CN117703678A

CN117703678A - Impeller assembling process for large-scale offshore wind driven generator

Info

Publication number: CN117703678A
Application number: CN202311670414.0A
Authority: CN
Inventors: 吴春寒; 沈锋; 郑为; 陈健; 郑马腾; 马骥
Original assignee: Ztt Marine Engineering Co ltd
Current assignee: Ztt Marine Engineering Co ltd
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-03-15
Anticipated expiration: 2043-12-07
Also published as: CN117703678B

Abstract

The invention discloses an impeller assembly process for a large-scale offshore wind turbine, which comprises the following steps of: (1) approach of a jack-up crane; (2) The hub is mounted on the hub mounting mechanism through a main crane; (3) Under the assistance of the first cable wind mechanism, the second cable wind mechanism and cable wind equipment on the right side of the main crane, the first blade is in butt joint and threaded connection with the hub through the main crane; (4) the first vane rotates clockwise to 2m from the 4# leg; (5) Repeating the steps to enable the second blade to be in butt joint and threaded connection with the hub; (6) The third blade is in butt joint and threaded connection with the hub through the matching of the main crane and the small crane; (7) The impeller is longitudinally moved to the right side by the cooperation of the main crane and the small crane; (8) The small crane is switched into an auxiliary crane, and the main crane and the auxiliary crane are matched to turn over and mount the impeller; (9) off-shore crane ship. The invention can safely and efficiently complete the impeller assembly and solve the problem of the impeller assembly of the large-scale wind turbine generator.

Description

Impeller assembling process for large-scale offshore wind driven generator

Technical Field

The invention relates to the technical field of offshore wind power foundations, in particular to an impeller assembly process for a large offshore wind power generator.

Background

The offshore wind turbine is developed to 16-20 WM from 8MW in a jumping manner, and the diameter of a fan impeller is also enlarged to 300m from 145m, so that the traditional impeller assembly process is not suitable for impeller assembly of a large-scale wind turbine due to interference, influence of factors exceeding a hoisting range and the like; if the impeller is assembled by using the cranes of 2 ships, the construction cost is increased. Therefore, the above problems need to be solved.

Disclosure of Invention

The invention aims to solve the technical problem of providing an impeller assembly process for a large-scale offshore wind turbine, which can safely and efficiently complete impeller assembly by matching a main crane, an auxiliary crane and a small crane and assisting the first cable wind mechanism and the second cable wind mechanism, thereby solving the problem of impeller assembly of a large-scale wind turbine.

In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to an impeller assembly process for a large-scale offshore wind turbine, which is characterized by comprising the following steps of:

(1) A small crane is arranged at the position, close to the 1# pile leg, of the self-elevating crane ship, an auxiliary crane is arranged at the position, close to the 2# pile leg, of the self-elevating crane ship, and a main crane is arranged at the position, close to the 4# pile leg, of the self-elevating crane ship; a hub mounting mechanism is horizontally embedded in the middle position between the 2# pile leg and the 4# pile leg on a deck of the self-elevating crane ship, and the hub mounting mechanism performs lifting and horizontal rotation actions through a lifting assembly and a rotation assembly;

(2) The self-elevating crane ship is also provided with a first cable wind mechanism and a second cable wind mechanism which are horizontally and freely rotated relative to the front side and the rear side of the 3# spud leg, and the first cable wind mechanism is arranged on one side close to the stern; the first cable wind mechanism is provided with 1 group of cable wind ropes, and the second cable wind mechanism is provided with 2 groups of cable wind ropes;

(3) The three blades are horizontally stacked up and down in parallel through the matching of the first hoisting support and the second hoisting support, then the three blades are hoisted by a main crane and horizontally placed on a bailey beam at the outer side of the port of the self-elevating crane along the head-tail direction, and the hub and the tripod are hoisted and placed on a deck; then the jack-up crane enters the field;

(4) Hoisting the hub through a main crane and installing the hub on a hub installation mechanism;

(5) Connecting a cable rope of a first cable mechanism and a cable rope of a second cable mechanism to the root of a first blade respectively, and simultaneously connecting the other cable rope of the second cable mechanism and a cable rope of cable equipment on the right side of a main crane to the end part of the first blade respectively;

(6) The method comprises the steps of controlling a cable rope of a second cable mechanism and a cable rope of cable equipment on the right side of a main crane to be in a non-force-exerting state, and simultaneously controlling the cable rope of a first cable mechanism and the other cable rope of the second cable mechanism to be in a tensioning state;

(7) The main crane lifts the end stress point and the root stress point of the first blade through the lifting beam, and the first blade is changed from horizontal and transverse state movement to horizontal and longitudinal state between the 1# pile leg and the 3# pile leg under the assistance of the first cable wind mechanism and the second cable wind mechanism;

(8) In order to avoid interference with the 3# pile leg, one cable rope of the second cable mechanism is controlled to be in a tensioning state, and simultaneously the cable rope of the first cable mechanism is automatically unhooked, so that the first blade can be longitudinally moved towards the hub under the assistance of the cable rope of the second cable mechanism and the other cable rope;

(9) When the working range of the other cable rope of the second cable wind mechanism is about to exceed, the cable rope of the cable wind equipment on the right side of the main crane is controlled to be in a tensioning state, and meanwhile, the other cable rope of the second cable wind mechanism is automatically unhooked, so that the first blade can be continuously moved towards the direction of the hub under the assistance of the cable rope of the second cable wind mechanism and the cable rope of the cable wind equipment on the right side of the main crane, and is in butt joint and screw connection with the corresponding position of the hub;

(10) After the first blade is installed, a cable rope of the second cable mechanism and a cable rope of cable equipment on the right side of the main crane are automatically unhooked, and a steel wire rope on the hanging beam is separated from the first blade; then, under the drive of the rotary component, the first blade rotates clockwise to a position 2m away from the 4# pile leg, so that an installation space is vacated for the second blade;

(11) Repeating the actions of the steps (5) to (9), and butt-jointing and screwing the second blade and the corresponding position of the hub;

(12) The main crane lifts the root stress point of the third blade through the steel wire rope, and the small crane lifts the end stress point of the third blade through the steel wire rope, so that the third blade can be lifted and is in butt joint and threaded connection with the corresponding position of the hub;

(13) Connecting a small crane with a roller at one end of a tripod through a steel wire rope, connecting the roller at the other end of the tripod with a third blade stress point of an impeller through the steel wire rope, and connecting a main crane with a hub stress point of the impeller through the steel wire rope;

(14) Then, the impeller is lifted and separated from the hub mounting mechanism by the cooperation of the main crane and the small crane, and moves along the longitudinal direction towards the starboard side direction, and the impeller is slightly turned over in the moving process;

(15) When the working range of the small crane is exceeded, the auxiliary crane is manually connected with the roller at the third end of the tripod through the steel wire rope, then the steel wire rope of the auxiliary crane is gradually tensioned in the process that the impeller continues to move towards the right side, and meanwhile, the steel wire rope of the small crane is gradually loosened, so that the auxiliary crane can be switched into the auxiliary crane to work in the rotation process of the tripod;

(16) When the steel wire rope of the auxiliary crane is in a fully tensioned state, unhooking the steel wire rope of the small crane, and turning over and mounting the impeller through the cooperation of the main crane and the auxiliary crane;

(17) After the impeller is installed, the auxiliary crane vertically places the tripod on the deck, and the self-elevating crane is off-site.

Preferably, in the step (1), the hub mounting mechanism, the swivel assembly and the lifting assembly are sequentially arranged from top to bottom, and the swivel assembly and the lifting assembly are embedded in a deck of the jack-up crane; the lifting end of the lifting assembly is vertically upwards arranged and is fixedly connected with the fixed end of the rotary assembly in a coaxial manner, so that the rotary assembly is driven to vertically move up and down; the rotating end of the rotary assembly is upwards arranged and is in threaded connection with the fixed end of the hub mounting mechanism, so that the hub mounting mechanism is driven to horizontally rotate.

Preferably, the deck of the jack-up crane does not interfere the lifting and rotating actions of the hub mounting mechanism, and the hub mounting mechanism comprises an upper connecting plate, a stand column, a lower connecting plate, a first rubber pad and a rib plate; the lower connecting plate is of a circular structure which is horizontally arranged, an upright post is further vertically arranged in the middle of the upper surface of the lower connecting plate, the upright post is of a round table-shaped structure, and the diameter of the lower surface of the upright post is larger than that of the upper surface of the lower connecting plate and smaller than that of the lower connecting plate; the lower surface of the upright post is welded and fixed with the lower connecting plate, an upper connecting plate is horizontally attached and welded on the upper surface of the upright post, the upper connecting plate is of a round structure matched with the connecting end of the main shaft of the wheel hub, the diameter of the upper connecting plate is larger than that of the upper surface of the upright post, and the upper connecting plate and the upright post are coaxially arranged; the upper surface of the upper connecting plate is also horizontally and fixedly provided with a first rubber pad, and the first rubber pad is of a circular structure matched with the upper connecting plate; a plurality of circles of mounting holes with different outer circle diameters are further vertically embedded in the upper surface of the first rubber pad, each mounting hole vertically extends downwards to the lower surface of the upper connecting plate, each mounting hole is matched with a spindle connecting end bolt hole of the hub, and the arrangement positions of the mounting holes are corresponding to the arrangement positions of the spindle connecting end bolt holes of the hub; the hub mounting mechanism is abutted against and attached to the main shaft connecting end of the hub through a first rubber pad and is fixedly connected with the main shaft connecting end of the hub through a mounting hole in a threaded manner; a plurality of rib plates are vertically arranged between the outer surface of the upright post and the lower surface of the upper connecting plate along the circumferential direction of the upright post at intervals, each rib plate is arranged in a non-interference manner with each mounting hole, and the upper connecting plate is supported and reinforced through the rib plates; the upper surface of lower connecting plate is still equipped with four first lugs vertically along its circumferencial direction equipartition interval for the stand outside, and then hoist and mount wheel hub installation mechanism through first lug.

Preferably, the lifting assembly comprises a cylinder body, an upper supporting plate, a lower supporting plate and a hydraulic cylinder; the lower support plate is horizontally arranged in a round structure and is embedded and installed in the middle position between the deck of the jack-up crane relative to the No. 2 pile leg and the No. 4 pile leg through a cylinder; an upper supporting plate with a circular structure is arranged right above the lower supporting plate at intervals in a horizontal direction, the section of the upper supporting plate is in an inverted T shape, and the lower end of the upper supporting plate is a large-diameter end; a plurality of hydraulic cylinders are vertically arranged on the lower surface of the lower support plate relative to the outer side of the cylinder body at intervals in the circumferential direction, and piston rods of all the hydraulic cylinders act synchronously; the piston rod of each hydraulic cylinder vertically extends upwards out of the upper surface of the lower supporting plate, is fixedly connected with the corresponding position of the lower surface of the upper supporting plate in a threaded manner, and drives the upper supporting plate to vertically move up and down.

Preferably, the swivel assembly comprises an upper top plate, a lower bottom plate, a swivel ring, a main gear, a swivel gearbox and a second motor; the upper top plate and the lower bottom plate are of round structures which are horizontally arranged and are arranged in parallel at intervals up and down; a rotary ring is horizontally and parallelly arranged between the upper top plate and the lower bottom plate, the rotary ring and the lower bottom plate are coaxially arranged, the diameter of the upper top plate is larger than the outer diameter of the rotary ring, the diameter of the lower bottom plate is larger than the outer diameter of the rotary ring, the upper surface of the inner ring of the rotary ring is fixedly connected with the upper top plate in a threaded manner, and the lower surface of the outer ring of the rotary ring is fixedly connected with the lower bottom plate in a threaded manner; the lower surface of the lower bottom plate is fixedly connected with the upper surface of the upper supporting plate in a coaxial way, and the upper supporting plate does not interfere the screw connection of the lower bottom plate and the swivel ring; the lower surface of the lower connecting plate is coaxially and horizontally attached to the upper surface of the upper top plate, and the lower surface of the lower connecting plate and the upper surface of the upper top plate are fixedly connected in a threaded manner; a second motor and a convolution gear box are vertically arranged on one side, far away from the upper supporting plate, of the lower surface of the lower bottom plate, the second motor is in linkage connection with the convolution gear box, the second motor is fixedly connected with the lower surface of the lower bottom plate in a threaded manner through the convolution gear box, and the output end of the convolution gear box vertically extends upwards to the upper surface of the lower bottom plate and is in meshed connection with the outer ring of the convolution ring through a main gear; under the drive of the second motor, the upper top plate horizontally rotates through the meshing cooperation of the main gear and the rotary ring, so as to drive the hub mounting mechanism to horizontally rotate, and the hub mounting mechanism is driven by the hydraulic cylinder to vertically move up and down.

Preferably, in the step (2), the first cable wind mechanism includes a first base plate, a first rotating shaft, a roller group, a first bracket, a second rotating shaft, a roller, a first motor, a second bracket, a cylinder, a pressing claw and a pressing roller; the first bottom plates are horizontally arranged on the deck of the jack-up crane at intervals and are opposite to the rear side of the 3# pile leg, and a first rotating shaft is further arranged between the lower surface of the first bottom plates and the deck of the jack-up crane in a vertical and coaxial mode, so that the first bottom plates can horizontally and freely rotate around the first rotating shaft in the axial direction; a plurality of circles of roller groups which are abutted against the first bottom plate are further connected and arranged on the deck of the jack-up crane relative to the position right below the first bottom plate, the plurality of circles of roller groups are coaxially arranged with the first rotating shaft and are arranged on the outer ring of the first rotating shaft, each roller group is conical, one end, close to the first rotating shaft, of each roller group is a small end, the other end of each roller group is a large end, and therefore the linear speed, close to the first rotating shaft, of the roller group is smaller when the roller group is adapted to the rotation of the first bottom plate; a first bracket is vertically arranged on one side of the upper surface of the first bottom plate, and the upper end of the first bracket is of a U-shaped structure; the second rotating shaft is horizontally arranged in the upper end of the first bracket, and two ends of the second rotating shaft are respectively and rotatably connected with two side surfaces of the upper end of the first bracket; one end of the second rotating shaft vertically extends out of the outer side surface of the first bracket and is in linkage connection with the output end of the first motor through a coupler; a roller is sleeved and fixed on the second rotating shaft relative to the inner part of the upper end of the first bracket in a coaxial manner, and a cable rope is wound on the roller and driven by the first motor to perform cable operation; a second bracket is further vertically arranged on the upper surface of the first bottom plate relative to the other side of the first bracket, an air cylinder is horizontally arranged at the upper end of the second bracket, and the telescopic end of the air cylinder is horizontally arranged towards the direction of the roller and is fixedly connected with the pressing claw; the pressing claws are of triangular structures which are vertically arranged, one ends of the pressing claws, which are far away from the roller, are fixedly connected with the telescopic ends of the air cylinders, the two sides of the pressing claws, which are close to the roller, are arranged in the same vertical plane up and down, pressing rollers are respectively sleeved on the pressing claws in a coaxial rotation mode, and the cable ropes are pressed against and wound on the roller through the pressing rollers; each press roller is matched with the inner circumferential surface of the roller, and the length of each press roller corresponds to the longitudinal width of the inner circumferential surface of the roller, so that the press rollers are communicated to prevent the cable ropes from loosening.

Preferably, in the step (2), the second cable wind mechanism is disposed between the 3# pile leg and the 1# pile leg on the deck of the jack-up crane ship and on a side close to the 3# pile leg; the structure of the second cable wind mechanism is similar to that of the first cable wind mechanism, and the second cable wind mechanism is provided with 2 rollers, so that 2 groups of cable wind ropes can be conveniently and respectively used for cable wind operation.

Preferably, in the step (3), the first lifting bracket is disposed at the root of the blade near the hub, and includes a second bottom plate, a first U-shaped plate, a first fixing plate, a first threaded rod, a second rubber pad, a third rubber pad, a first pressing plate, a locking nut, and a second lifting lug; the three first U-shaped plates are sequentially arranged in parallel horizontally from top to bottom, the opening ends of the first U-shaped plates are all arranged downwards, and the opening groove directions of the first U-shaped plates are ensured to be horizontally and transversely arranged; the two ends of each first U-shaped plate are horizontally turned over towards the outer side, first fixing plates matched with the turned-over edges are respectively and horizontally fixed at the positions, close to the top ends, of the two side surfaces of the two first U-shaped plates close to the lower side, and then the three first U-shaped plates are connected together in a threaded manner through the threaded connection of the first fixing plates and the corresponding turned-over edges; the lower surface of the lowest first U-shaped plate is also horizontally provided with a second bottom plate matched with the first U-shaped plate, and the second bottom plate is in threaded connection and fixed with the turned-over edge of the corresponding first U-shaped plate, so that three square areas with the same upper, middle and lower parts are formed by the three first U-shaped plates and the second bottom plate; the upper surface of the second bottom plate and four right angles of the upper surfaces of the two first U-shaped plates close to the lower side are respectively and symmetrically welded with first threaded rods vertically, and every two adjacent four first threaded rods are respectively arranged in corresponding square areas; the quadrilateral area surrounded by every adjacent four first threaded rods is matched with the outer surface area, close to the hub, of the root of each corresponding blade, and three blades are horizontally and transversely placed on the upper surface of the second bottom plate or the upper surfaces of the two first U-shaped plates close to the lower side respectively, and the root of each blade is placed in the quadrilateral area surrounded by the corresponding four first threaded rods close to the hub; a first pressing plate is horizontally arranged on the upper surface of each blade, and the arrangement position of each first pressing plate corresponds to the arrangement position of the corresponding four first threaded rods; the upper end of each first threaded rod vertically penetrates through the upper surface of the corresponding first pressing plate upwards, is locked and fixed through a locking nut respectively, and is abutted against the upper surface of the corresponding blade, so that the root of the blade is covered in the corresponding hub through a first U-shaped plate; a second rubber pad is horizontally abutted against and tightly combined between the lowest blade and the upper surface of the second bottom plate and between the rest two blades and the upper surface of the corresponding first U-shaped plate, and the upper surface of each second rubber pad is matched with the lower surface area of the corresponding blade root close to the hub; a third rubber pad is horizontally abutted and tightly fitted between each blade and the lower surface of the corresponding first pressing plate, and the lower surface of each third rubber pad is matched with the upper surface area of the corresponding blade root close to the hub; two second lifting lugs are further welded vertically at the left side and the right side of the top of each first U-shaped plate at intervals, and the corresponding blades are lifted through the second lifting lugs.

Preferably, in the step (3), the second lifting bracket is disposed at a stress point near the end of the blade, and the setting distance between the second lifting bracket and the first lifting bracket needs to be ensured to be matched with the bailey beam span on the outer side of the port; the second hoisting bracket comprises a third bottom plate, a second U-shaped plate, a second fixing plate, a second threaded rod, a fourth rubber pad, a fifth rubber pad, a second pressing plate, a locking nut and a third lifting lug; the three second U-shaped plates are sequentially arranged in parallel horizontally from top to bottom, the opening ends of the second U-shaped plates are all arranged downwards, and the opening groove directions of the second U-shaped plates are all horizontally and transversely arranged; the two ends of each second U-shaped plate are horizontally turned over towards the outer side, second fixing plates matched with the turned over edges are respectively and horizontally fixed at the positions, close to the top ends, of the two side surfaces of the two second U-shaped plates close to the lower side, and then the three second U-shaped plates are connected together in a threaded manner up and down through the threaded connection of the second fixing plates and the corresponding turned over edges; a third bottom plate matched with the second U-shaped plate is horizontally arranged on the lower surface of the lowest U-shaped plate, and the third bottom plate is screwed and fixed with the turned edge of the corresponding second U-shaped plate, so that three square areas with the same upper, middle and lower parts are formed by the three second U-shaped plates and the third bottom plate; the upper surface of the third bottom plate and four right angles of the upper surfaces of the two second U-shaped plates close to the lower side are respectively and symmetrically welded with a second threaded rod vertically, and every two adjacent four second threaded rods are respectively arranged in corresponding square areas; the quadrilateral areas surrounded by every two adjacent four second threaded rods are matched with the outer surface areas, close to the stress points, of the ends of the corresponding blades, the three blades are horizontally and transversely placed on the upper surface of the third bottom plate or the upper surfaces of the two second U-shaped plates close to the lower side respectively, and the ends of the blades are placed in the quadrilateral areas surrounded by the corresponding four second threaded rods close to the stress points respectively; a second pressing plate is horizontally arranged on the upper surface of each blade, and the arrangement position of each second pressing plate corresponds to the arrangement positions of the corresponding four second threaded rods; the upper end of each second threaded rod vertically penetrates through the upper surface of the corresponding second pressing plate upwards, is locked and fixed through a locking nut respectively, and is abutted against the upper surface of the corresponding blade, so that the position, close to a stress point, of the end part of the blade is covered in the second U-shaped plate; a fourth rubber pad is horizontally abutted against and tightly combined between the lowest blade and the upper surface of the third bottom plate and between the rest two blades and the upper surface of the corresponding second U-shaped plate, and the upper surface of each fourth rubber pad is matched with the lower surface area of the position, close to the stress point, of the corresponding blade end; a fifth rubber pad is horizontally abutted and tightly fitted between each blade and the lower surface of the corresponding second pressing plate, and the lower surface of each fifth rubber pad is matched with the upper surface area of the position, close to the stress point, of the end part of the corresponding blade; and two third lifting lugs are vertically welded at intervals on the left side and the right side of the top of each second U-shaped plate respectively, and the corresponding blades are lifted through the third lifting lugs.

Preferably, in the step (13), the tripod is in a triangular frame structure, and pulleys matched with the steel wire ropes are respectively sleeved and rotated at three end points of the tripod, so that the force applied by the small crane is switched into the force applied by the auxiliary crane through the tripod.

The invention has the beneficial effects that:

(1) According to the invention, through the matched use of the main crane, the auxiliary crane and the small crane and the assistance of the first cable wind mechanism and the second cable wind mechanism, the impeller assembly can be safely and efficiently completed, and the problem of the impeller assembly of the large-scale wind turbine generator is solved;

(2) According to the invention, the first cable wind mechanism and the second cable wind mechanism are arranged, so that the problem that the cable wind equipment on the main crane is influenced due to overlong pile legs is solved, the stability of the blade hoisting process is improved, and the assembly efficiency is improved;

(3) According to the invention, through the matched use of the first hoisting bracket and the second hoisting bracket, three blades are conveniently stacked on the outer side of the gunwale of the self-elevating crane ship up and down along the head-to-tail direction, so that the occupied space is saved, and a transport ship is not required to be additionally arranged for transporting the blades, thereby reducing the construction cost;

(4) The hub mounting mechanism can realize a lifting function, so that the mounting height of the hub can be reduced according to actual conditions, and overhead operation is reduced;

(5) The hub mounting mechanism can realize the turning function, solves the problem that the minimum turning radius is influenced by the overlong suspension arm of the main crane, and further, the first blade cannot be lifted to a designated position for mounting, and improves the assembly efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the approach of the jack-up vessel of the present invention.

Fig. 2 is a schematic view of the first blade according to the invention in a hoisted position.

FIG. 3 is a schematic view of an assembled angle adjustment of a first vane according to the present invention.

Fig. 4 is a schematic view of a second blade according to the invention in a hoisted position.

Fig. 5 is a schematic view of a third blade according to the present invention.

Fig. 6 is a schematic view of the lifting of the impeller of the present invention.

Fig. 7 is a schematic diagram of the switching between the small crane and the auxiliary crane according to the present invention.

Fig. 8 is a schematic view of the installation of the impeller of the present invention.

Fig. 9 is a schematic structural view of a first cable wind mechanism of the present invention.

FIG. 10 is a unitary stacked schematic view of a blade of the present invention.

Fig. 11 is a schematic view of A-A in fig. 10.

Fig. 12 is a schematic view of B-B in fig. 10.

FIG. 13 is a schematic view of the structure of the hub mounting mechanism portion of the present invention.

Wherein, 1-jack-up crane vessel; 2-a main crane; 3-an auxiliary crane; 4-a small crane; 5-a first cable mechanism; 6-a second cable mechanism; 7-a hub mounting mechanism; 8-blades; 9-a hub; 10-bailey beam; 11-pile legs; 12-tripod; 13-pulleys; 501-a first bottom plate; 502-a first rotating shaft; 503-roller group; 504-a first scaffold; 505-roller; 506-a first motor; 507-a guy rope; 508-a second scaffold; 509-cylinders; 510-pressing claws; 511-a press roll; 701-a cylinder; 702-an upper support plate; 703-a lower support plate; 704-upper top plate; 705-lower plate; 706-a swirl ring; 707—a main gear; 708-a swivel gearbox; 709-a second motor; 710-hydraulic cylinder; 711-upper connection plate; 712-upright posts; 713-lower connection plate; 714-rib plate; 715-a first rubber pad; 716-mounting holes; 81-a second bottom plate; 82-a first U-shaped plate; 83-a first fixing plate; 84-a first threaded rod; 85-a second rubber pad; 86-a third rubber pad; 87-a first platen; 88-locking nut; 89-a second lifting lug; 91-a third bottom plate; 92-a second U-shaped plate; 93-a second fixing plate; 94-a second threaded rod; 95-fourth rubber pad; 96-fifth rubber pad; 97-a second platen; 98-third lifting lug.

Detailed Description

The technical scheme of the present invention will be clearly and completely described in the following detailed description.

The invention relates to an impeller assembly process for a large-scale offshore wind turbine, which is shown in figures 1-13 and comprises the following steps:

(1) A small crane 4 is arranged at the position, close to the 1# pile leg, of the self-elevating crane ship 1, an auxiliary crane 3 is arranged at the position, close to the 2# pile leg, of the self-elevating crane ship 1, and a main crane 2 is arranged at the position, close to the 4# pile leg, of the self-elevating crane ship; the hub mounting mechanism 7 is horizontally embedded in the deck of the jack-up crane ship 1 relative to the middle position between the No. 2 pile leg and the No. 4 pile leg, and the hub mounting mechanism 7 performs lifting and horizontal rotation actions through the lifting assembly and the revolving assembly.

In the steps, the hub mounting mechanism 7, the rotary component and the lifting component are sequentially arranged from top to bottom, and the rotary component and the lifting component are embedded in the deck of the self-elevating crane ship 1, so that the height of the hub mounting mechanism 7 is reduced, and the overhead operation is reduced; the lifting end of the lifting assembly is vertically upwards arranged and is fixedly connected with the fixed end of the rotary assembly in a coaxial manner, so that the rotary assembly is driven to vertically move up and down; the rotating end of the rotary assembly is upwards arranged and is fixedly connected with the fixed end of the hub mounting mechanism 7 in a threaded manner, so that the hub mounting mechanism 7 is driven to horizontally rotate.

The deck of the self-elevating crane ship 1 does not interfere the lifting and rotating actions of the hub mounting mechanism 7, and the hub mounting mechanism 7 comprises an upper connecting plate 711, a column 712, a lower connecting plate 713, a first rubber pad 715 and a rib plate 714; as shown in fig. 13, the lower connecting plate 713 is of a circular structure horizontally arranged, and a vertical column 712 is vertically arranged in the middle of the upper surface of the lower connecting plate 713, wherein the vertical column 712 is of a circular truncated cone structure, and the diameter of the lower surface of the lower connecting plate 713 is larger than that of the upper surface of the lower connecting plate 713; the lower surface of the upright post 712 is welded and fixed with the lower connecting plate 713, the upper surface of the upright post 712 is also horizontally attached and welded with an upper connecting plate 711, the upper connecting plate 711 is of a circular structure matched with the main shaft connecting end of the hub 9, the diameter of the upper connecting plate is larger than that of the upper surface of the upright post 712, and the upper connecting plate 711 and the upright post 712 are coaxially arranged; the upper surface of the upper connecting plate 711 is also horizontally and fixedly provided with a first rubber pad 715, and the first rubber pad 715 is of a circular structure matched with the upper connecting plate 711;

as shown in fig. 13, a plurality of circles of mounting holes 716 with different outer circle diameters are vertically embedded in the upper surface of the first rubber pad 715, each mounting hole 716 vertically extends downwards to the lower surface of the upper connecting plate 711, each mounting hole 716 is respectively matched with a bolt hole of the main shaft connecting end of the hub 9, and the arrangement positions of the mounting holes are respectively corresponding to the arrangement positions of the bolt holes of the main shaft connecting end of the hub 9; the hub mounting mechanism 7 is abutted against and attached to the main shaft connecting end of the hub 9 through a first rubber pad 715 and is fixedly connected with the main shaft connecting end of the hub 9 through a mounting hole 716 in a threaded manner; a plurality of rib plates 714 are vertically arranged between the outer surface of the upright post 712 and the lower surface of the upper connecting plate 711 along the circumferential direction of the upright post, and each rib plate 714 is arranged in a non-interference way with each mounting hole 716 respectively, so that the upper connecting plate 711 is supported and reinforced through the rib plates 714; four first lifting lugs are vertically arranged on the upper surface of the lower connecting plate 713 at intervals which are uniformly distributed along the circumferential direction relative to the outer side of the upright post 712, and the hub mounting mechanism 7 is lifted through the first lifting lugs. According to the invention, through arranging the mounting holes 716 with different excircle diameters, the threaded fit of hubs 9 with different types or sizes is conveniently met, and when the hub mounting mechanism 7 cannot meet different hubs 9, the other hub mounting mechanism 7 can be hoisted through the first lifting lug.

The lifting assembly of the present invention comprises a cylinder 701, an upper support plate 702, a lower support plate 703 and a hydraulic cylinder 710; as shown in fig. 13, the lower support plate 703 is horizontally arranged in a circular structure and is embedded and mounted in the deck of the jack-up ship 1 at an intermediate position between the relative 2# spud leg and the 4# spud leg by the cylinder 701; an upper support plate 702 with a circular structure is horizontally arranged at intervals on the upper side of the lower support plate 703, the section of the upper support plate 702 is in an inverted T shape, and the lower end of the upper support plate 702 is a large-diameter end; a plurality of hydraulic cylinders 710 are vertically arranged on the lower surface of the lower supporting plate 703 relative to the outer side of the cylinder 701 at intervals uniformly distributed along the circumferential direction, and the piston rods of all the hydraulic cylinders 710 act synchronously; the piston rod of each hydraulic cylinder 710 extends vertically upwards out of the upper surface of the lower support plate 703, is screwed and fixed to the corresponding position of the lower surface of the upper support plate 702, and drives the upper support plate 702 to vertically move up and down.

The swivel assembly of the present invention includes an upper top plate 704, a lower bottom plate 705, a swivel ring 706, a main gear 707, a swivel gear box 708, and a second motor 709; as shown in fig. 13, the upper top plate 704 and the lower bottom plate 705 are both in a circular structure arranged horizontally and are arranged in parallel at intervals up and down; a swirl ring 706 is horizontally and parallelly arranged between the upper top plate 704 and the lower bottom plate 705, the swirl ring 706 and the lower bottom plate 705 are coaxially arranged, the diameter of the upper top plate 704 is larger than the outer diameter of the swirl ring 706, the diameter of the lower bottom plate 705 is larger than the outer diameter of the swirl ring 706, the upper surface of the inner ring of the swirl ring 706 is fixedly connected with the upper top plate 704 in a threaded manner, and the lower surface of the outer ring of the swirl ring is fixedly connected with the lower bottom plate 705 in a threaded manner; the lower surface of the lower bottom plate 705 is fixedly connected with the upper surface of the upper support plate 702 in a coaxial manner, and the upper support plate 702 does not interfere the screw connection of the lower bottom plate 705 and the swivel ring 706; the lower surface of the lower connecting plate 713 is coaxially and horizontally attached to the upper surface of the upper top plate 704, and the lower surface and the upper surface are fixedly connected in a threaded manner;

As shown in fig. 13, a second motor 709 and a convolution gear box 708 are vertically arranged on one side of the lower surface of the lower bottom plate 705 far away from the upper support plate 702, the second motor 709 is connected with the convolution gear box 708 in a linkage manner, and is fixed with the lower surface of the lower bottom plate 705 in a screwed manner through the convolution gear box 708, and the output end of the convolution gear box 708 vertically extends upwards out of the upper surface of the lower bottom plate 705 and is connected with the outer ring of the convolution ring 706 in a meshed manner through a main gear 707; under the drive of the second motor 709, the upper top plate 704 horizontally rotates through the meshing cooperation of the main gear 707 and the swivel ring 706, so as to drive the hub mounting mechanism 7 to horizontally rotate, and the hub mounting mechanism 7 is driven by the hydraulic cylinder 710 to vertically move up and down.

(2) The self-elevating crane ship 1 is also provided with a first cable wind mechanism 5 and a second cable wind mechanism 6 which are horizontally and freely rotated on the front side and the rear side of the 3# spud leg, and the first cable wind mechanism 5 is arranged on the side close to the stern; the first guy mechanism 5 has 1 set of guy wires 507 and the second guy mechanism 6 has 2 sets of guy wires 507.

In the above steps, the first cable mechanism 5 includes the first base plate 501, the first rotation shaft 502, the roller group 503, the first bracket 504, the second rotation shaft, the drum 505, the first motor 506, the second bracket 508, the cylinder 509, the pressing claw 510, and the pressing roller 511; as shown in fig. 9, the first bottom plates 501 are horizontally arranged at intervals on the deck of the jack-up crane 1 at the rear side relative to the 3# pile leg, and a first rotating shaft 502 is also vertically and coaxially arranged between the lower surface of the first bottom plates and the deck of the jack-up crane 1, so that the first bottom plates 501 can horizontally and freely rotate around the axial direction of the first rotating shaft 502; a plurality of circles of roller groups 503 which are abutted against the first bottom plate 501 are further connected and arranged on the deck of the jack-up crane ship relative to the position right below the first bottom plate 501, the plurality of circles of roller groups 503 and the first rotating shaft 502 are coaxially arranged and are arranged on the outer ring of the first rotating shaft 502, each roller group 503 is conical, one end, close to the first rotating shaft 502, of each roller group 503 is a small end, the other end is a large end, and the linear speed, close to the first rotating shaft 502, of each roller group 503 is smaller when the jack-up crane ship is adapted to the rotation of the first bottom plate 501; a first bracket 504 is vertically arranged on one side of the upper surface of the first bottom plate 501, and the upper end of the first bracket 504 is of a U-shaped structure; the second rotating shaft is horizontally arranged in the upper end of the first bracket 504, and two ends of the second rotating shaft are respectively and rotatably connected with two side surfaces of the upper end of the first bracket 504; one end of the second rotating shaft vertically extends out of the outer side surface of the first bracket 504 and is in linkage connection with the output end of the first motor 506 through a coupler; a roller 505 is sleeved and fixed on the second rotating shaft relative to the inner part of the upper end of the first bracket 504 in a coaxial manner, and a cable rope 507 is wound on the roller 505 and is driven by a first motor 506 to perform cable operation;

As shown in fig. 9, a second bracket 508 is further vertically arranged on the upper surface of the first bottom plate 501 opposite to the first bracket 504, an air cylinder 509 is horizontally arranged at the upper end of the second bracket 508, and the telescopic end of the air cylinder 509 is horizontally arranged towards the direction of the roller 505 and is fixedly connected with a pressing claw 510; the pressing claws 510 are of a triangle structure which is vertically arranged, one end of each pressing claw far away from the roller 505 is fixedly connected with the telescopic end of the air cylinder 509, two sides of each pressing claw 510 close to the roller 505 are vertically arranged in the same vertical plane, pressing rollers 511 are respectively sleeved on the pressing claws in a coaxial rotation mode, and the cable ropes 507 are pressed against and wound on the roller 505 through the pressing rollers 511; wherein each press roller 511 is matched with the inner circumferential surface of the drum 505 and has a length corresponding to the longitudinal width of the inner circumferential surface of the drum 505, and the press rollers 511 are used to prevent the cable 507 from being loosened.

The second cable mechanism 6 is arranged between the 3# pile leg and the 1# pile leg on the deck of the self-elevating crane ship 1 and is arranged at one side close to the 3# pile leg; the structure of the second cable wind mechanism 6 is similar to that of the first cable wind mechanism 5, and is equivalent to that of arranging 2 sets of rollers 505 and 2 sets of corresponding rollers 511 on the upper surface of the bottom plate, so that 2 sets of cable wind ropes 507 are respectively wound on the corresponding rollers 505, and the 2 sets of cable wind ropes 507 are convenient to perform cable wind operation respectively.

(3) The three blades 8 are horizontally stacked up and down in parallel through the matching of the first hoisting support and the second hoisting support, the three blades 8 are hoisted through the main crane 2 and horizontally placed on the bailey beam 10 on the left outboard side of the jack-up crane ship 1 along the head-to-tail direction, and the hub 9 and the tripod 12 are hoisted and placed on the deck; the jack-up vessel 1 is then launched.

Firstly, in the description, fig. 10 to 12 are schematic views, and the widths of the first hoisting bracket and the second hoisting bracket are not as wide as those shown in the drawings, and are determined according to practical situations, so that the drawings are more visual and are intended.

The first hoisting bracket is arranged at the root of the blade 8 near the hub 9 and comprises a second bottom plate 81, a first U-shaped plate 82, a first fixing plate 83, a first threaded rod 84, a second rubber pad 85, a third rubber pad 86, a first pressing plate 87, a locking nut 88 and a second lifting lug 89; as shown in fig. 10 and 11, the three first U-shaped plates 82 are horizontally arranged in parallel in sequence from top to bottom, and the open ends thereof are all arranged downward, and ensure that the open slot directions thereof are all horizontally and transversely arranged; the two ends of each first U-shaped plate 82 are horizontally turned over towards the outer side, and first fixing plates 83 matched with the turned over edges are horizontally and fixedly arranged at the positions, close to the top ends, of the two side surfaces of the two first U-shaped plates 82 at the lower side respectively, so that the three first U-shaped plates 82 are connected together in an up-and-down screwed mode through the screw connection of the first fixing plates 83 and the corresponding turned over edges; the lower surface of the lowest first U-shaped plate 82 is also horizontally provided with a second bottom plate 81 matched with the lowest first U-shaped plate, the second bottom plate 81 is screwed and fixed with the turned-over edge of the corresponding first U-shaped plate 82, and then three square areas with the same upper, middle and lower parts are formed by the three first U-shaped plates 82 and the second bottom plate 81;

As shown in fig. 10 and 11, four right angles on the upper surface of the second bottom plate 81 and the upper surfaces of the two first U-shaped plates 82 on the lower side are also respectively and symmetrically welded with first threaded rods 84 vertically, and each adjacent four first threaded rods 84 are respectively arranged in corresponding square areas; the quadrilateral area surrounded by every adjacent four first threaded rods 84 is matched with the outer surface area of the root of the corresponding blade 8 near the hub 9, and the three blades 8 are horizontally and transversely placed on the upper surface of the second bottom plate 81 or the upper surfaces of the two first U-shaped plates 82 near the lower side respectively, and the root of each blade is placed in the quadrilateral area surrounded by the corresponding four first threaded rods 84 near the hub 9 respectively; a first pressing plate 87 is horizontally arranged on the upper surface of each blade 8, and the arrangement position of each first pressing plate 87 corresponds to the arrangement position of the corresponding four first threaded rods 84; the upper end of each first threaded rod 84 vertically penetrates through the upper surface of the corresponding first pressing plate 87 upwards, is locked and fixed through a locking nut 88 respectively, and enables each first pressing plate 87 to be abutted against the upper surface of the corresponding blade 8, and further covers the root of the blade 8 in the corresponding hub 9 through the first U-shaped plate 82;

As shown in fig. 10 and 11, a second rubber pad 85 is horizontally abutted against and fitted between the lowermost one blade 8 and the upper surface of the second bottom plate 81 and between the remaining two blades 8 and the upper surface of the corresponding first U-shaped plate 82, and the upper surface of each second rubber pad 85 is matched with the lower surface area of the root of the corresponding blade 8 near the hub 9; a third rubber pad 86 is horizontally abutted against and tightly combined with the lower surface of each blade 8 and the corresponding first pressing plate 87, and the lower surface of each third rubber pad 86 is matched with the upper surface area of the root of the corresponding blade 8 close to the hub 9; two second lifting lugs 89 are further welded vertically at intervals on the left and right sides of the top of each first U-shaped plate 82, and lifting of the corresponding blade 8 is carried out through the second lifting lugs 89.

The second hoisting bracket is arranged at a stress point near the end part of the blade 8, and the arrangement distance between the second hoisting bracket and the first hoisting bracket is required to ensure that the second hoisting bracket is matched with the span of the bailey beam 10 at the outer side of the port; the second hoisting bracket comprises a third bottom plate 91, a second U-shaped plate 92, a second fixing plate 93, a second threaded rod 94, a fourth rubber pad 95, a fifth rubber pad 96, a second pressing plate 97, a locking nut 88 and a third lifting lug 98; as shown in fig. 10 and 12, the three second U-shaped plates 92 are horizontally arranged in parallel in sequence from top to bottom, and the open ends thereof are all arranged downwards, and ensure that the open slot directions thereof are all horizontally and transversely arranged; the two ends of each second U-shaped plate 92 are horizontally turned over towards the outer side, and second fixing plates 93 matched with the turned over edges are horizontally and fixedly arranged at the positions, close to the top ends, of the two side surfaces of the two second U-shaped plates 92 at the lower side respectively, so that the three second U-shaped plates 92 are connected together in an up-and-down screwed mode through the screw connection of the second fixing plates 93 and the corresponding turned over edges; a third bottom plate 91 matched with the second U-shaped plate 92 is horizontally arranged on the lower surface of the lowest second U-shaped plate 92, the third bottom plate 91 is screwed and fixed with the turned edge of the corresponding second U-shaped plate 92, and then three square areas with the same upper, middle and lower parts are formed by the three second U-shaped plates 92 and the third bottom plate 91;

As shown in fig. 10 and 12, four right angles on the upper surface of the third bottom plate 91 and the upper surfaces of the two second U-shaped plates 92 at the lower side are also respectively and symmetrically welded with a second threaded rod 94 vertically, and each adjacent four second threaded rods 94 are respectively arranged in corresponding square areas; the quadrilateral area enclosed by every adjacent four second threaded rods 94 is matched with the outer surface area of the end part of the corresponding blade 8 close to the stress point, and the three blades 8 are horizontally and transversely placed on the upper surface of the third bottom plate 91 or the upper surfaces of the two second U-shaped plates 92 close to the lower side respectively, and the end parts of the three blades are placed in the quadrilateral area enclosed by the corresponding four second threaded rods 94 close to the stress point respectively; the upper surface of each blade 8 is also horizontally provided with a second pressing plate 97, and the setting position of each second pressing plate 97 corresponds to the setting position of the corresponding four second threaded rods 94; the upper end of each second threaded rod 94 vertically penetrates through the upper surface of the corresponding second pressing plate 97 upwards, is locked and fixed through the locking nut 88 respectively, and enables each second pressing plate 97 to be abutted against the upper surface of the corresponding blade 8, and then the position of the end part of the blade 8 close to the stress point is covered in the position through the second U-shaped plate 92;

As shown in fig. 10 and 12, a fourth rubber pad 95 is horizontally abutted against and fitted between the lowermost one blade 8 and the upper surface of the third bottom plate 91 and between the remaining two blades 8 and the upper surface of the corresponding second U-shaped plate 92, and the upper surface of each fourth rubber pad 95 is matched with the lower surface area of the corresponding blade 8 at the point where the end is abutted against the stress; a fifth rubber pad 96 is horizontally abutted against and tightly combined with the lower surface of each blade 8 and the lower surface of the corresponding second pressing plate 97, and the lower surface of each fifth rubber pad 96 is matched with the upper surface area of the position, close to the stress point, of the end part of the corresponding blade 8; two third lifting lugs 98 are vertically welded on the left and right sides of the top of each second U-shaped plate 92 at intervals, and the corresponding blades 8 are lifted through the third lifting lugs 98.

(4) The hub 9 is then hoisted by the main crane 2 and mounted on the hub mounting mechanism 7.

(5) Then the corresponding first U-shaped plate 82, the second U-shaped plate 92, the first pressing plate 87 and the second pressing plate 97 of the uppermost layer are sequentially detached, the cable ropes 507 of the first cable mechanism 5 and the cable ropes 507 of the second cable mechanism 6 are respectively connected with the root parts of the first blades 8, and simultaneously the other cable rope 507 of the second cable mechanism 6 and the cable ropes 507 of the cable devices on the right side of the main crane 2 are respectively connected with the end parts of the first blades 8.

(6) The cable rope 507 of the second cable mechanism 6 and the cable rope 507 of the cable device on the right side of the main crane 2 are controlled to be in a state of not exerting force, and the cable rope 507 of the first cable mechanism 5 and the other cable rope 507 of the second cable mechanism 6 are controlled to be in a state of being tensioned.

(7) The main crane 2 lifts the end stress point and the root stress point of the first blade 8 through the hanging beam, and the first blade 8 is changed from horizontal and transverse state movement to horizontal and longitudinal state between the 1# pile leg and the 3# pile leg with the aid of the first cable wind mechanism 5 and the second cable wind mechanism 6.

(8) In order to avoid interference with the 3# pile leg, one cable rope 507 of the second cable mechanism 6 is controlled to be in a tensioning state, and simultaneously the cable rope 507 of the first cable mechanism 5 is automatically unhooked, so that the first blade 8 can be longitudinally moved towards the hub 9 under the assistance of the cable rope 507 of the second cable mechanism 6 and the other cable rope 507.

(9) When the working range of the other cable rope 507 of the second cable wind mechanism 6 is about to be exceeded, the cable rope 507 of the cable wind equipment on the right side of the main crane 2 is controlled to be in a tensioning state, and meanwhile, the other cable rope 507 of the second cable wind mechanism 6 is automatically unhooked, so that the first blade 8 can be continuously moved towards the direction of the hub 9 under the assistance of the cable rope 507 of the second cable wind mechanism 6 and the cable rope 507 of the cable wind equipment on the right side of the main crane 2, and is in butt joint and screwed with the corresponding position of the hub 9.

(10) After the first blade 8 is installed, a cable rope 507 of the second cable mechanism 6 and a cable rope 507 of cable equipment on the right side of the main crane 2 are automatically unhooked, and a steel wire rope on a hanging beam is separated from the first blade 8; then, the first blade 8 is rotated clockwise to a position 2m away from the 4# pile leg under the driving of the rotary assembly, so that the installation space is reserved for the second blade 8.

According to the invention, as the boom of the large jack-up ship 1 is overlong and the elevation angle of the boom is 45-78 degrees, the minimum turning radius reaches more than 26m, so that the first blade 8 cannot be directly hoisted to a required position for butt joint installation, and after the first blade 8 is installed, the first blade 8 is required to be rotated clockwise, so that space is reserved for installing the second blade 8.

(11) Then the corresponding first U-shaped plate 82, the second U-shaped plate 92, the first pressing plate 87 and the second pressing plate 97 of the middle layer are disassembled in sequence, the actions of the steps (5) to (9) are repeated, and the second blade 8 is in butt joint and threaded connection with the corresponding position of the hub 9.

(12) Then dismantle corresponding first U-shaped board 82, second U-shaped board 92, first clamp plate 87 and the second clamp plate 97 of the one deck of bottommost in proper order, then main loop wheel machine 2 is through the root stress point department of wire rope hoist third blade 8, and little loop wheel machine 4 is through wire rope hoist third blade 8's tip stress point department, alright hoist third blade 8 to with wheel hub 9 corresponding position butt joint spiro union.

(13) The small crane 4 is connected with a roller at one end of the tripod 12 through a steel wire rope, the roller at the other end of the tripod 12 is connected with a third blade 8 stress point of the impeller through the steel wire rope, and the main crane 2 is connected with a hub 9 stress point of the impeller through the steel wire rope.

As shown in fig. 7, the tripod 12 is a triangle frame structure, and pulleys 13 matched with the steel wire ropes are respectively sleeved and rotated at three end points of the tripod, so that the force applied by the small crane 4 is switched to the force applied by the auxiliary crane 3 through the tripod 12, and the problem that the impeller can not be turned over and installed due to the fact that the working range of the small crane 4 is exceeded is solved.

In addition, the tripod 12 can be provided with a pop-up structure, so that when the tripod 12 is not needed, the pop-up structure can be popped up, and the tripod 12 can be vertically placed on the deck of the jack-up crane 1.

(14) The impeller is then lifted off the hub mounting mechanism 7 by the cooperation of the main crane 2 and the small crane 4, and is moved in the longitudinal direction in the starboard side direction, and is slightly turned during the movement.

(15) When the working range of the small crane 4 is about to be exceeded, the auxiliary crane 3 is manually connected with the roller at the third end of the tripod 12 through the steel wire rope, then in the process that the impeller continues to move towards the right side direction, the steel wire rope of the auxiliary crane 3 is gradually tensioned, and meanwhile, the steel wire rope of the small crane 4 is gradually loosened, so that the auxiliary crane 3 can be switched into working in the rotating process of the tripod 12.

(16) When the steel wire rope of the auxiliary crane 3 is in a fully tensioned state, the steel wire rope of the small crane 4 is unhooked, and the turning over and the installation of the impeller can be performed through the matching of the main crane 2 and the auxiliary crane 3.

(17) After the impeller is installed, the auxiliary crane 3 vertically places the tripod 12 on the deck, and the jack-up crane 1 leaves the field.

The invention has the beneficial effects that:

(1) According to the invention, through the matched use of the main crane 2, the auxiliary crane 3 and the small crane 4 and the assistance of the first cable wind mechanism 5 and the second cable wind mechanism 6, the impeller assembly can be safely and efficiently completed, and the problem of the impeller assembly of the large-scale wind turbine generator is solved;

(2) According to the invention, the first cable wind mechanism 5 and the second cable wind mechanism 6 are arranged, so that the problem that the use of cable wind equipment on the main crane 2 is influenced due to overlong pile legs is solved, the stability of the hoisting process of the blades 8 is improved, and the assembly efficiency is improved;

(3) According to the invention, through the matched use of the first hoisting bracket and the second hoisting bracket, three blades 8 are conveniently stacked on the outer side of the gunwale of the self-elevating crane ship 1 up and down along the head-to-tail direction, so that the occupied space is saved, and a transport ship is not required to be additionally arranged for transporting the blades 8, thereby reducing the construction cost;

(4) The hub mounting mechanism 7 can realize a lifting function, so that the mounting height of the hub 9 can be reduced according to actual conditions, and overhead operation is reduced;

(5) The hub mounting mechanism 7 can realize the rotation function, solves the problem that the minimum rotation radius is influenced by the overlong suspension arm of the main crane 2, and further the first blade 8 cannot be lifted to a designated position for mounting, and improves the assembly efficiency.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the present invention is not limited to the above embodiments, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the design concept of the present invention should fall within the protection scope of the present invention, and the claimed technical content of the present invention is fully described in the claims.

Claims

1. An impeller assembly process for a large-scale offshore wind turbine is characterized by comprising the following steps of:

2. An impeller assembly process for a large offshore wind turbine according to claim 1, wherein: in the step (1), the hub mounting mechanism, the rotary assembly and the lifting assembly are sequentially arranged from top to bottom, and the rotary assembly and the lifting assembly are embedded in a deck of the jack-up crane; the lifting end of the lifting assembly is vertically upwards arranged and is fixedly connected with the fixed end of the rotary assembly in a coaxial manner, so that the rotary assembly is driven to vertically move up and down; the rotating end of the rotary assembly is upwards arranged and is in threaded connection with the fixed end of the hub mounting mechanism, so that the hub mounting mechanism is driven to horizontally rotate.

3. An impeller assembly process for a large offshore wind turbine according to claim 2, wherein: the deck of the jack-up crane does not interfere the lifting and rotating actions of the hub mounting mechanism, and the hub mounting mechanism comprises an upper connecting plate, a stand column, a lower connecting plate, a first rubber pad and a rib plate; the lower connecting plate is of a circular structure which is horizontally arranged, an upright post is further vertically arranged in the middle of the upper surface of the lower connecting plate, the upright post is of a round table-shaped structure, and the diameter of the lower surface of the upright post is larger than that of the upper surface of the lower connecting plate and smaller than that of the lower connecting plate; the lower surface of the upright post is welded and fixed with the lower connecting plate, an upper connecting plate is horizontally attached and welded on the upper surface of the upright post, the upper connecting plate is of a round structure matched with the connecting end of the main shaft of the wheel hub, the diameter of the upper connecting plate is larger than that of the upper surface of the upright post, and the upper connecting plate and the upright post are coaxially arranged; the upper surface of the upper connecting plate is also horizontally and fixedly provided with a first rubber pad, and the first rubber pad is of a circular structure matched with the upper connecting plate; a plurality of circles of mounting holes with different outer circle diameters are further vertically embedded in the upper surface of the first rubber pad, each mounting hole vertically extends downwards to the lower surface of the upper connecting plate, each mounting hole is matched with a spindle connecting end bolt hole of the hub, and the arrangement positions of the mounting holes are corresponding to the arrangement positions of the spindle connecting end bolt holes of the hub; the hub mounting mechanism is abutted against and attached to the main shaft connecting end of the hub through a first rubber pad and is fixedly connected with the main shaft connecting end of the hub through a mounting hole in a threaded manner; a plurality of rib plates are vertically arranged between the outer surface of the upright post and the lower surface of the upper connecting plate along the circumferential direction of the upright post at intervals, each rib plate is arranged in a non-interference manner with each mounting hole, and the upper connecting plate is supported and reinforced through the rib plates; the upper surface of lower connecting plate is still equipped with four first lugs vertically along its circumferencial direction equipartition interval for the stand outside, and then hoist and mount wheel hub installation mechanism through first lug.

4. A process for assembling an impeller for a large offshore wind turbine according to claim 3, wherein: the lifting assembly comprises a cylinder body, an upper supporting plate, a lower supporting plate and a hydraulic cylinder; the lower support plate is horizontally arranged in a round structure and is embedded and installed in the middle position between the deck of the jack-up crane relative to the No. 2 pile leg and the No. 4 pile leg through a cylinder; an upper supporting plate with a circular structure is arranged right above the lower supporting plate at intervals in a horizontal direction, the section of the upper supporting plate is in an inverted T shape, and the lower end of the upper supporting plate is a large-diameter end; a plurality of hydraulic cylinders are vertically arranged on the lower surface of the lower support plate relative to the outer side of the cylinder body at intervals in the circumferential direction, and piston rods of all the hydraulic cylinders act synchronously; the piston rod of each hydraulic cylinder vertically extends upwards out of the upper surface of the lower supporting plate, is fixedly connected with the corresponding position of the lower surface of the upper supporting plate in a threaded manner, and drives the upper supporting plate to vertically move up and down.

5. The impeller assembly process for a large offshore wind turbine of claim 4, wherein: the rotary assembly comprises an upper top plate, a lower bottom plate, a rotary ring, a main gear, a rotary gear box and a second motor; the upper top plate and the lower bottom plate are of round structures which are horizontally arranged and are arranged in parallel at intervals up and down; a rotary ring is horizontally and parallelly arranged between the upper top plate and the lower bottom plate, the rotary ring and the lower bottom plate are coaxially arranged, the diameter of the upper top plate is larger than the outer diameter of the rotary ring, the diameter of the lower bottom plate is larger than the outer diameter of the rotary ring, the upper surface of the inner ring of the rotary ring is fixedly connected with the upper top plate in a threaded manner, and the lower surface of the outer ring of the rotary ring is fixedly connected with the lower bottom plate in a threaded manner; the lower surface of the lower bottom plate is fixedly connected with the upper surface of the upper supporting plate in a coaxial way, and the upper supporting plate does not interfere the screw connection of the lower bottom plate and the swivel ring; the lower surface of the lower connecting plate is coaxially and horizontally attached to the upper surface of the upper top plate, and the lower surface of the lower connecting plate and the upper surface of the upper top plate are fixedly connected in a threaded manner; a second motor and a convolution gear box are vertically arranged on one side, far away from the upper supporting plate, of the lower surface of the lower bottom plate, the second motor is in linkage connection with the convolution gear box, the second motor is fixedly connected with the lower surface of the lower bottom plate in a threaded manner through the convolution gear box, and the output end of the convolution gear box vertically extends upwards to the upper surface of the lower bottom plate and is in meshed connection with the outer ring of the convolution ring through a main gear; under the drive of the second motor, the upper top plate horizontally rotates through the meshing cooperation of the main gear and the rotary ring, so as to drive the hub mounting mechanism to horizontally rotate, and the hub mounting mechanism is driven by the hydraulic cylinder to vertically move up and down.

6. An impeller assembly process for a large offshore wind turbine according to claim 1, wherein: in the step (2), the first cable wind mechanism comprises a first bottom plate, a first rotating shaft, a roller group, a first bracket, a second rotating shaft, a roller, a first motor, a second bracket, an air cylinder, a pressing claw and a pressing roller; the first bottom plates are horizontally arranged on the deck of the jack-up crane at intervals and are opposite to the rear side of the 3# pile leg, and a first rotating shaft is further arranged between the lower surface of the first bottom plates and the deck of the jack-up crane in a vertical and coaxial mode, so that the first bottom plates can horizontally and freely rotate around the first rotating shaft in the axial direction; a plurality of circles of roller groups which are abutted against the first bottom plate are further connected and arranged on the deck of the jack-up crane relative to the position right below the first bottom plate, the plurality of circles of roller groups are coaxially arranged with the first rotating shaft and are arranged on the outer ring of the first rotating shaft, each roller group is conical, one end, close to the first rotating shaft, of each roller group is a small end, the other end of each roller group is a large end, and therefore the linear speed, close to the first rotating shaft, of the roller group is smaller when the roller group is adapted to the rotation of the first bottom plate; a first bracket is vertically arranged on one side of the upper surface of the first bottom plate, and the upper end of the first bracket is of a U-shaped structure; the second rotating shaft is horizontally arranged in the upper end of the first bracket, and two ends of the second rotating shaft are respectively and rotatably connected with two side surfaces of the upper end of the first bracket; one end of the second rotating shaft vertically extends out of the outer side surface of the first bracket and is in linkage connection with the output end of the first motor through a coupler; a roller is sleeved and fixed on the second rotating shaft relative to the inner part of the upper end of the first bracket in a coaxial manner, and a cable rope is wound on the roller and driven by the first motor to perform cable operation; a second bracket is further vertically arranged on the upper surface of the first bottom plate relative to the other side of the first bracket, an air cylinder is horizontally arranged at the upper end of the second bracket, and the telescopic end of the air cylinder is horizontally arranged towards the direction of the roller and is fixedly connected with the pressing claw; the pressing claws are of triangular structures which are vertically arranged, one ends of the pressing claws, which are far away from the roller, are fixedly connected with the telescopic ends of the air cylinders, the two sides of the pressing claws, which are close to the roller, are arranged in the same vertical plane up and down, pressing rollers are respectively sleeved on the pressing claws in a coaxial rotation mode, and the cable ropes are pressed against and wound on the roller through the pressing rollers; each press roller is matched with the inner circumferential surface of the roller, and the length of each press roller corresponds to the longitudinal width of the inner circumferential surface of the roller, so that the press rollers are communicated to prevent the cable ropes from loosening.

7. The impeller assembly process for a large offshore wind turbine of claim 6, wherein: in the step (2), the second cable wind mechanism is arranged between the 3# pile leg and the 1# pile leg on the deck of the jack-up crane ship and is arranged at one side close to the 3# pile leg; the structure of the second cable wind mechanism is similar to that of the first cable wind mechanism, and the second cable wind mechanism is provided with 2 rollers, so that 2 groups of cable wind ropes can be conveniently and respectively used for cable wind operation.

8. An impeller assembly process for a large offshore wind turbine according to claim 1, wherein: in the step (3), the first hoisting bracket is arranged at the root of the blade near the hub and comprises a second bottom plate, a first U-shaped plate, a first fixing plate, a first threaded rod, a second rubber pad, a third rubber pad, a first pressing plate, a locking nut and a second lifting lug; the three first U-shaped plates are sequentially arranged in parallel horizontally from top to bottom, the opening ends of the first U-shaped plates are all arranged downwards, and the opening groove directions of the first U-shaped plates are ensured to be horizontally and transversely arranged; the two ends of each first U-shaped plate are horizontally turned over towards the outer side, first fixing plates matched with the turned-over edges are respectively and horizontally fixed at the positions, close to the top ends, of the two side surfaces of the two first U-shaped plates close to the lower side, and then the three first U-shaped plates are connected together in a threaded manner through the threaded connection of the first fixing plates and the corresponding turned-over edges; the lower surface of the lowest first U-shaped plate is also horizontally provided with a second bottom plate matched with the first U-shaped plate, and the second bottom plate is in threaded connection and fixed with the turned-over edge of the corresponding first U-shaped plate, so that three square areas with the same upper, middle and lower parts are formed by the three first U-shaped plates and the second bottom plate; the upper surface of the second bottom plate and four right angles of the upper surfaces of the two first U-shaped plates close to the lower side are respectively and symmetrically welded with first threaded rods vertically, and every two adjacent four first threaded rods are respectively arranged in corresponding square areas; the quadrilateral area surrounded by every adjacent four first threaded rods is matched with the outer surface area, close to the hub, of the root of each corresponding blade, and three blades are horizontally and transversely placed on the upper surface of the second bottom plate or the upper surfaces of the two first U-shaped plates close to the lower side respectively, and the root of each blade is placed in the quadrilateral area surrounded by the corresponding four first threaded rods close to the hub; a first pressing plate is horizontally arranged on the upper surface of each blade, and the arrangement position of each first pressing plate corresponds to the arrangement position of the corresponding four first threaded rods; the upper end of each first threaded rod vertically penetrates through the upper surface of the corresponding first pressing plate upwards, is locked and fixed through a locking nut respectively, and is abutted against the upper surface of the corresponding blade, so that the root of the blade is covered in the corresponding hub through a first U-shaped plate; a second rubber pad is horizontally abutted against and tightly combined between the lowest blade and the upper surface of the second bottom plate and between the rest two blades and the upper surface of the corresponding first U-shaped plate, and the upper surface of each second rubber pad is matched with the lower surface area of the corresponding blade root close to the hub; a third rubber pad is horizontally abutted and tightly fitted between each blade and the lower surface of the corresponding first pressing plate, and the lower surface of each third rubber pad is matched with the upper surface area of the corresponding blade root close to the hub; two second lifting lugs are further welded vertically at the left side and the right side of the top of each first U-shaped plate at intervals, and the corresponding blades are lifted through the second lifting lugs.

9. An impeller assembly process for a large offshore wind turbine according to claim 1, wherein: in the step (3), the second hoisting bracket is arranged at a stress point near the end part of the blade, and the arrangement distance between the second hoisting bracket and the first hoisting bracket needs to be ensured to be matched with the bailey beam span at the outer side of the port; the second hoisting bracket comprises a third bottom plate, a second U-shaped plate, a second fixing plate, a second threaded rod, a fourth rubber pad, a fifth rubber pad, a second pressing plate, a locking nut and a third lifting lug; the three second U-shaped plates are sequentially arranged in parallel horizontally from top to bottom, the opening ends of the second U-shaped plates are all arranged downwards, and the opening groove directions of the second U-shaped plates are all horizontally and transversely arranged; the two ends of each second U-shaped plate are horizontally turned over towards the outer side, second fixing plates matched with the turned over edges are respectively and horizontally fixed at the positions, close to the top ends, of the two side surfaces of the two second U-shaped plates close to the lower side, and then the three second U-shaped plates are connected together in a threaded manner up and down through the threaded connection of the second fixing plates and the corresponding turned over edges; a third bottom plate matched with the second U-shaped plate is horizontally arranged on the lower surface of the lowest U-shaped plate, and the third bottom plate is screwed and fixed with the turned edge of the corresponding second U-shaped plate, so that three square areas with the same upper, middle and lower parts are formed by the three second U-shaped plates and the third bottom plate; the upper surface of the third bottom plate and four right angles of the upper surfaces of the two second U-shaped plates close to the lower side are respectively and symmetrically welded with a second threaded rod vertically, and every two adjacent four second threaded rods are respectively arranged in corresponding square areas; the quadrilateral areas surrounded by every two adjacent four second threaded rods are matched with the outer surface areas, close to the stress points, of the ends of the corresponding blades, the three blades are horizontally and transversely placed on the upper surface of the third bottom plate or the upper surfaces of the two second U-shaped plates close to the lower side respectively, and the ends of the blades are placed in the quadrilateral areas surrounded by the corresponding four second threaded rods close to the stress points respectively; a second pressing plate is horizontally arranged on the upper surface of each blade, and the arrangement position of each second pressing plate corresponds to the arrangement positions of the corresponding four second threaded rods; the upper end of each second threaded rod vertically penetrates through the upper surface of the corresponding second pressing plate upwards, is locked and fixed through a locking nut respectively, and is abutted against the upper surface of the corresponding blade, so that the position, close to a stress point, of the end part of the blade is covered in the second U-shaped plate; a fourth rubber pad is horizontally abutted against and tightly combined between the lowest blade and the upper surface of the third bottom plate and between the rest two blades and the upper surface of the corresponding second U-shaped plate, and the upper surface of each fourth rubber pad is matched with the lower surface area of the position, close to the stress point, of the corresponding blade end; a fifth rubber pad is horizontally abutted and tightly fitted between each blade and the lower surface of the corresponding second pressing plate, and the lower surface of each fifth rubber pad is matched with the upper surface area of the position, close to the stress point, of the end part of the corresponding blade; and two third lifting lugs are vertically welded at intervals on the left side and the right side of the top of each second U-shaped plate respectively, and the corresponding blades are lifted through the third lifting lugs.

10. An impeller assembly process for a large offshore wind turbine according to claim 1, wherein: in the step (13), the tripod is of a triangular frame structure, and pulleys matched with the steel wire ropes are respectively sleeved and rotated at three end points of the tripod, so that the force application of the small crane is switched into the force application of the auxiliary crane through the tripod.