CN118188507A - Horizontal middle open type slurry pump - Google Patents
Horizontal middle open type slurry pump Download PDFInfo
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- CN118188507A CN118188507A CN202410500950.4A CN202410500950A CN118188507A CN 118188507 A CN118188507 A CN 118188507A CN 202410500950 A CN202410500950 A CN 202410500950A CN 118188507 A CN118188507 A CN 118188507A
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- pump
- impeller
- cover plate
- outer layer
- metal outer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a horizontal middle-open slurry pump, which comprises: a bearing housing assembly; a spindle rotatably disposed on the bearing housing assembly; an impeller portion connected to a first end of the main shaft; the pump body and the pump cover are connected in a vertically covered mode to form a horizontally middle open structure, the pump body forms the lower half part of the horizontally middle open structure, the pump cover forms the upper half part of the horizontally middle open structure, the pump body and the pump cover both comprise a metal outer layer and a ceramic lining layer arranged on the inner wall of the metal outer layer, the ceramic lining layer of the pump body and the pump cover forms a volute chamber, and one side, close to a bearing box assembly, of the metal outer layer of the pump body and the pump cover forms a sealing cavity capable of containing a sealing assembly.
Description
Technical Field
The invention relates to the technical field of slurry pumps, in particular to a horizontal middle-open slurry pump.
Background
The slurry pump is a pump for conveying a solid-liquid mixture, in particular a heavy slurry pump, and is widely applied to the technical fields of mines, power plants, dredging, metallurgy, chemical industry, building materials and the like and is used for conveying slurry containing abrasive and corrosive solid particles. The industry, especially a mine concentrating mill, has a severe service condition, the conveying medium is highly abrasive and corrosive slurry, and the overflow parts of the slurry pump are easily damaged, so that the service life of the common heavy slurry pump is shortened, the common heavy slurry pump is replaced frequently, time and labor are wasted, and the maintenance cost of equipment is increased. The overflow component is used as a core component of the slurry pump, is in direct contact with a medium during operation, and mainly comprises an impeller, a volute, a front guard plate and a rear guard plate. In the prior art, the heavy slurry pump mainly has the following defects:
(1) The traditional slurry pump is not horizontally opened, so that maintenance is difficult, the working environment of the slurry pump is severe, the conveyed medium has abrasiveness and corrosiveness, and sealing materials are easy to damage, so that the sealing materials need to be replaced periodically. When the sealing material is replaced by the traditional slurry pump, the whole bearing box is required to be opened, the transmission shaft is taken out, and the damaged sealing material can be taken out after the sealing gland is disassembled. The maintenance difficulty is high, the maintenance cost is high, and the working efficiency is low.
(2) The assembly surface precision of backplate and the pump body is difficult to control around traditional sediment stuff pump, and the thick liquids is easy ooze to the metal level from the assembly surface, must adopt labyrinth seal and rubber circle dual seal just can prevent the medium leakage, and the sealing requirement is higher, and the operation degree of difficulty is big, wastes time and energy.
Disclosure of Invention
The present invention aims to solve the above-mentioned drawbacks and disadvantages of the prior art by providing a horizontal split slurry pump.
The technical problems solved by the invention can be realized by adopting the following technical scheme:
a horizontal mid-open slurry pump comprising:
A bearing housing assembly;
a spindle rotatably disposed on the bearing housing assembly;
an impeller portion connected to a first end of the main shaft;
the pump body and the pump cover are connected in a vertically covered mode to form a horizontally middle open structure, the pump body forms the lower half part of the horizontally middle open structure, the pump cover forms the upper half part of the horizontally middle open structure, the pump body and the pump cover both comprise a metal outer layer and a ceramic lining layer arranged on the inner wall of the metal outer layer, the ceramic lining layer of the pump body and the pump cover forms a volute chamber, and one side, close to a bearing box assembly, of the metal outer layer of the pump body and the pump cover forms a sealing cavity capable of containing a sealing assembly.
In a preferred embodiment of the present invention, the ceramic liner comprises a hot pressed silicon nitride ceramic liner.
In a preferred embodiment of the present invention, a gap is left between the ceramic inner liner and the metal outer layer, and the gap is filled with an adhesive, so that the ceramic inner liner and the metal outer layer are tightly combined.
In a preferred embodiment of the invention, the middle open face of the horizontal middle open structure is provided with a polytetrafluoroethylene sealing layer.
In a preferred embodiment of the invention, the seal assembly comprises a stuffing seal or a mechanical seal.
In a preferred embodiment of the present invention, the seal assembly includes an auxiliary impeller friction auxiliary seal body, the auxiliary impeller friction auxiliary seal body includes an auxiliary impeller rotatably disposed on a shaft section corresponding to the seal cavity, an inner annular groove is disposed in a middle portion of one end of the auxiliary impeller facing the impeller portion, an outer annular groove is disposed at an outer periphery of one end of the auxiliary impeller facing the impeller portion, a water inlet and a water outlet are disposed at positions between the inner annular groove and the outer annular groove of the metallic outer layer or/and the metallic outer layer of the pump cover, a first friction pair is disposed on the inner annular groove through a first elastic assembly, a second friction pair is disposed on the outer annular groove through a second elastic assembly, a first lower semi-annular cover plate corresponding to the first friction pair is disposed at one end of the metallic outer layer facing the auxiliary impeller of the pump body, a first upper semi-annular cover plate corresponding to the first friction pair is disposed at one end of the metallic outer layer facing the auxiliary impeller, a first lower semi-annular cover plate corresponding to the first friction pair is disposed at one end of the metallic outer layer facing the auxiliary impeller, a second upper semi-annular cover plate corresponding to the first friction pair is disposed at one end of the metallic outer layer facing the first friction pair, a second semi-annular cover plate corresponding to the second friction pair is disposed at one end of the metallic outer layer facing the second friction pair, and a second semi-annular cover plate corresponding to the second friction pair is disposed at one end of the metallic outer layer facing the second friction pair corresponding to the first friction pair, and a second annular cover plate corresponding to the metallic outer semi-annular cover plate corresponding to the first friction pair cover plate, and a second annular cover plate corresponding upper semi-annular cover plate corresponding to the second friction pair cover plate corresponding upper ring cover plate corresponding to the second friction pair outer ring and.
In a preferred embodiment of the present invention, a first annular retainer ring is disposed on a side, close to the high-pressure cavity, of one end of the first friction pair facing the first annular cover plate, a second annular retainer ring is disposed on a side, close to the high-pressure cavity, of one end of the second friction pair facing the second annular cover plate, a first arc-shaped surface recessed toward the impeller portion is disposed on a side, facing the high-pressure cavity, of the first annular cover plate, and a second arc-shaped surface recessed toward the impeller portion is disposed on a side, facing the high-pressure cavity, of the second annular cover plate.
In a preferred embodiment of the invention, the secondary impeller is removably connected to a secondary impeller hub that is keyed to the spindle.
In a preferred embodiment of the invention, the pump body is connected with the bracket body of the bearing box assembly through a bolt assembly, and support legs are arranged at the bottom of the pump body.
In a preferred embodiment of the present invention, the impeller portion is made of a metal skeleton and a hot-pressed silicon nitride ceramic bonded by a polymer resin composite ceramic adhesive.
Due to the adoption of the technical scheme, the slurry pump adopts a horizontal middle-open structure, so that the impeller is convenient to detach, the sealing device is maintained, and the condition in the pump can be checked only by opening the pump cover during maintenance. In addition, the front guard plate and the rear guard plate of the traditional slurry pump are omitted, an integrated inner layer structure is adopted, the sealing of the joint surfaces of the front guard plate and the rear guard plate of the traditional slurry pump and the pump body is not required to be considered, slurry is prevented from seeping out of the assembly surface to the metal layer, the sealing difficulty is reduced, and the sealing performance is further improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is an enlarged view at I of fig. 1.
Fig. 3 is a front view of an embodiment of the present invention.
Fig. 4 is a schematic structural view of another embodiment of the present invention.
Fig. 5 is an enlarged view at I of fig. 4.
Fig. 6 is a front view of another embodiment of the present invention.
Detailed Description
The invention is further described below in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Example 1
Referring to fig. 1 to 3, a horizontal center-opening slurry pump includes a bearing housing assembly 100, a main shaft 200, an impeller portion 300, a pump body 400, and a pump cover 500.
The bearing housing assembly 100 includes a bracket body 110 and a bearing housing 120 provided on the bracket body 110, and a central portion of the main shaft 200 is rotatably provided on a bearing 130 of the bearing housing 120.
The first end 210 of the main shaft 200 is connected to the impeller portion 300, and the second end 220 is connected to the driving device. The main shaft 200 mainly transmits torque, and transmits the torque of the drive unit to the impeller 300, thereby rotating the impeller 300, and bringing the pump into an operating state.
The pump body 400 and the pump cover 500 are in matched connection in an upper cover-to-lower cover mode to form a horizontal middle-open structure, the pump body 400 forms the lower half part of the horizontal middle-open structure, and the pump cover 500 forms the upper half part of the horizontal middle-open structure. The pump body 400 and the pump cover 500 each include a metal outer layer 410, 510 and a ceramic liner 420, 520 disposed on an inner wall of the metal outer layer 410, 510. The ceramic liners 420, 520 of the pump body 400 and pump cover 500 form a volute 600, and the metallic outer layers 410, 510 of the pump body 400 and pump cover 500 form a seal cavity 700 on the side of the pump body 400 and pump cover 500 adjacent the bearing housing assembly 100 that accommodates the seal assembly. The ceramic inner liners 420 and 520 of the pump body 400 and the pump cover 500 comprise the whole volute 600, no splicing surface exists except the middle opening surface, the volute 600 is formed into a closed vortex cavity after the ceramic inner liners 420 and 520 are installed, the volume loss of a medium from a high-pressure cavity to a low-pressure cavity is reduced, the efficiency of the pump is improved, and zero contact between the medium and a metal material is truly realized.
The ceramic inner liners 420, 520 in this embodiment comprise a hot pressed silicon nitride ceramic inner liner, the ceramic inner liners 420, 520 being inner flow paths in direct contact with a medium, and the metal outer layers 410, 510 being portions connected to other parts. Silicon carbide has high strength and hardness, but has high brittleness, and the traditional molding method is only grouting molding, so that the mechanical processing is difficult. The hot-pressed silicon nitride ceramic lining layer has low density, high strength, high temperature resistance and good wear resistance and corrosion resistance, and is widely applied to the field of fluid transportation. The hot-pressed silicon nitride ceramic lining layer has stable chemical property, does not react with metal in a natural state, has high strength and hardness and has general shock resistance. But the metal outer layer and the hot-pressed silicon nitride ceramic are combined for use, so that the impact resistance of the hot-pressed silicon nitride ceramic lining layer is improved, the service life is prolonged, the corrosion of slurry with high abrasion and high corrosion to metal parts is prevented, the service life of the slurry pump is prolonged, the frequent replacement of the slurry pump in field use is avoided, and the cost of manpower and material resources is saved. And the surface of the hot-pressed silicon nitride ceramic lining layer is smooth, and the hot-pressed silicon nitride ceramic lining layer formed by pouring does not need to be machined, so that the machining cost is saved.
The thickness of the metal outer layers 410, 510 and the ceramic inner liners 420, 520 is selected according to the size and pressure of the bore of the slurry pump. The metal outer layers 410 and 510 are embedded with the ceramic inner liners 420 and 520, and certain gaps are reserved between the metal outer layers 410 and 510 and the ceramic inner liners 420 and 520 for preventing errors caused by production and processing, and macromolecule resin composite ceramic adhesives are filled in the gaps for adhesion, so that the metal outer layers 410 and 510 are tightly combined with the ceramic inner liners 420 and 520. The pump body 400 and the pump cover 500 are connected by the stud 10, so that the impeller is convenient to detach, and the sealing device is maintained. The middle open face 20 of the horizontal middle open structure is provided with a polytetrafluoroethylene sealing layer 30, and the polytetrafluoroethylene sealing layer 30 has excellent corrosion resistance.
The pump body 400 is connected with the bracket body 110 of the bearing housing assembly 100 through the bolt assembly 40, and the support legs 50 are arranged at the bottom of the pump body 400, so that the pump body 400 has a stable support structure, and the pump body 400 can be independently and fixedly supported after the pump cover 500 is opened.
The impeller 300 is made of a metal skeleton and a hot-pressed silicon nitride ceramic, and the metal skeleton and the hot-pressed silicon nitride ceramic are bonded by a polymer resin composite ceramic adhesive. The impeller 300 is a core of the pump, and transmits energy input from the motor to the slurry, so that the slurry obtains energy and is discharged from the pump to a designated place. The inlet of the slurry flow passage 310 of the impeller part 300 is in butt joint with a pump port, the pump port is connected with an inlet pipeline 70 by using a bolt member 60, the inlet pipeline 70 consists of an inlet flange 71, an outlet flange 73 and a middle taper pipe 72, wherein the flow passage in the middle taper pipe 72 is brushed with a polymer resin composite ceramic layer, and the wear resistance of the slurry flow passage is improved. The metal outer layers 410, 510 of the pump body 400 and the pump cover 500 connecting the inlet pipe 70 need to be thickened, and then the outer layers of the pump body 400 and the pump cover 500 are added with reinforcing ribs, so that the strength of the reinforcing ribs is increased, and the corresponding thickness of the reinforcing ribs is selected according to the pressure.
In this embodiment, the seal assembly includes a secondary impeller friction secondary seal 800, the secondary impeller friction secondary seal 800 includes a secondary impeller 810 rotatably disposed on a shaft section of the main shaft 200 corresponding to the seal cavity 700, an inner annular groove 820 is disposed in a middle portion of an end of the secondary impeller 810 facing the impeller portion 300, and an outer annular groove 840 is disposed in an outer periphery of an end of the secondary impeller 810 facing the impeller portion 300. The metal outer layer 410 of the pump body 400 and/or the metal outer layer 510 of the pump cover 500 are provided with a water inlet 851 and a water outlet (not shown) at positions between the inner annular groove 820 and the outer annular groove 840, and the water inlet 851 is connected with the water inlet pipe 852. The inner annular groove 820 is provided with a first friction pair 861 through a first elastic component 860, the outer annular groove 840 is provided with a second friction pair 871 through a second elastic component 870, one end of the metal outer layer 410 of the pump body 400 facing the secondary impeller 810 is provided with a first lower semi-annular cover plate 881 corresponding to the first friction pair 861, one end of the metal outer layer 510 of the pump cover 500 facing the secondary impeller 810 is provided with a first upper semi-annular cover plate 882 corresponding to the first friction pair 861, and the first lower semi-annular cover plate 881 and the first upper semi-annular cover plate 882 form a first annular cover plate corresponding to the first friction pair 861. The end of the metal outer layer 410 of the pump body 400 facing the secondary impeller 810 is provided with a second lower semi-annular cover plate 883 corresponding to the second friction pair 871, the end of the metal outer layer 510 of the pump cover 500 facing the secondary impeller 810 is provided with a second upper semi-annular cover plate 884 corresponding to the second friction pair 871, and the second lower semi-annular cover plate 883 and the second upper semi-annular cover plate 884 form a second annular cover plate corresponding to the second friction pair 871. The area surrounded by the metal outer layer 410 of the pump body 400, the metal outer layer 510 of the pump cover 500, the secondary impeller 810, the first friction pair 861, the second friction pair 871, the first annular cover plate and the second annular cover plate forms a high-pressure cavity H.
The first friction pair 861 is provided with first annular retaining ring 8611 towards one side that is close to high-pressure cavity H of the one end of first annular apron, and the one end that is close to high-pressure cavity H of second annular apron towards second friction pair 871 is provided with second annular retaining ring 8711, and one side that is towards high-pressure cavity H of first annular apron is provided with the first arcwall face 885 towards the sunken orientation of impeller portion 300, and one side that is towards high-pressure cavity H of second annular apron is provided with the second arcwall face 886 towards the sunken orientation of impeller portion 300.
The auxiliary impeller 810 is detachably connected with the auxiliary impeller hub 811 which is in key connection with the main shaft 200, and a high polymer resin composite ceramic layer is arranged on the outer surface of the auxiliary impeller 810, so that the wear resistance of the auxiliary impeller is improved.
The first friction pair 861 and the side wall of the inner annular groove 820 are provided with a sealing ring 821, and the second friction pair 871 and the side wall of the outer annular groove 840 are provided with a sealing ring 841. The sealing ring acts as a seal to prevent slurry from entering the inner annular groove 820 or the outer annular groove 840 and affecting the proper operation of the friction pair. The first elastic component 860 and the second elastic component 870 comprise springs, the springs are sleeved on the guide posts at the tail parts of the friction pairs, and movable grooves for the guide posts to move are correspondingly arranged at the positions where the friction pairs are arranged.
The metal outer layers 410, 510 of the pump body 400 and the pump cover 500 are provided with a protective cover 890 through a bolt member 80 on one side close to the bearing housing assembly 100, the protective cover 890 is mainly used for protecting the auxiliary impeller friction auxiliary sealing body 800, and the bolt member 80 is fixed on the outer sides of the metal outer layers 410, 510 of the pump body 400 and the pump cover 500 by half-type assembly, so that disassembly is convenient.
The working principle of this embodiment is as follows:
In operation, the water inlet pipe 852 is connected first, and the high-pressure cavity H is filled with high-pressure water through the water inlet 851, and the liquid pressure in the high-pressure cavity H is higher than the pressure of the working point when the impeller part 300 works normally. Then the driving device drives the main shaft 200 to rotate, the impeller part 300 starts to rotate, centrifugal force is generated by the high-speed rotation of the impeller part 300, pressure is increased for the slurry, the slurry is thrown into the volute 600 to be discharged from the outlet pipe under the action of the centrifugal force, and the purpose of delivering the slurry is achieved. When the main shaft 200 rotates, the auxiliary impeller 810 is driven to rotate together, and then the first friction pair 861 and the second friction pair 871 are driven to rotate, because the liquid pressure in the high-pressure cavity H is higher than the working point pressure when the impeller portion 300 works normally, the slurry environment in the pump body forms relatively low pressure, the environment of the high-pressure cavity H forms relatively high pressure, the slurry in the pump body cannot leak through the high-pressure cavity H, and the injected high-pressure water can also form lubrication and cooling effects. In addition, when high-pressure water is injected into the high-pressure cavity H, the high-pressure water applies a part of axial pressure to the first annular retainer ring 8611 and the second annular retainer ring 8711, so that the axial pressure of the first friction pair 861 and the second friction pair 871 is increased, and the tightness is further ensured. The high-pressure water applies partial axial pressure to the first arc-shaped surface 885 and the second arc-shaped surface 886, so that the axial pressure of the first annular cover plate and the second annular cover plate is increased, and the tightness is further ensured.
When the auxiliary impeller friction pair sealing body 800 needs to be maintained, only the protective cover 890 needs to be removed, and the friction pair can be taken out by removing the connecting bolt of the auxiliary impeller hub 811. When the impeller part 300 is detached and the auxiliary impeller friction pair sealing body 800 is replaced by detaching the stud 10 with the middle opening surface and installing a suspension screw above the pump cover 500 and suspending the pump cover 500.
Example 2
Referring to fig. 4 to 6, a horizontal center-opening slurry pump includes a bearing housing assembly 100, a main shaft 200, an impeller portion 300, a pump body 400, and a pump cover 500.
The bearing housing assembly 100 includes a bracket body 110 and a bearing housing 120 provided on the bracket body 110, and a central portion of the main shaft 200 is rotatably provided on a bearing 130 of the bearing housing 120.
The first end 210 of the main shaft 200 is connected to the impeller portion 300, and the second end 220 is connected to the driving device. The main shaft 200 mainly transmits torque, and transmits the torque of the drive unit to the impeller 300, thereby rotating the impeller 300, and bringing the pump into an operating state.
The pump body 400 and the pump cover 500 are in matched connection in an upper cover-to-lower cover mode to form a horizontal middle-open structure, the pump body 400 forms the lower half part of the horizontal middle-open structure, and the pump cover 500 forms the upper half part of the horizontal middle-open structure. The pump body 400 and the pump cover 500 each include a metal outer layer 410, 510 and a ceramic liner 420, 520 disposed on an inner wall of the metal outer layer 410, 510. The ceramic liners 420, 520 of the pump body 400 and pump cover 500 form a volute 600, and the metallic outer layers 410, 510 of the pump body 400 and pump cover 500 form a seal cavity 700 on the side of the pump body 400 and pump cover 500 adjacent the bearing housing assembly 100 that accommodates the seal assembly. The ceramic inner liners 420 and 520 of the pump body 400 and the pump cover 500 comprise the whole volute 600, no splicing surface exists except the middle opening surface, the volute 600 is formed into a closed vortex cavity after the ceramic inner liners 420 and 520 are installed, the volume loss of a medium from a high-pressure cavity to a low-pressure cavity is reduced, the efficiency of the pump is improved, and zero contact between the medium and a metal material is truly realized.
The ceramic inner liners 420, 520 in this embodiment comprise a hot pressed silicon nitride ceramic inner liner, the ceramic inner liners 420, 520 being inner flow paths in direct contact with a medium, and the metal outer layers 410, 510 being portions connected to other parts. Silicon carbide has high strength and hardness, but has high brittleness, and the traditional molding method is only grouting molding, so that the mechanical processing is difficult. The hot-pressed silicon nitride ceramic lining layer has low density, high strength, high temperature resistance and good wear resistance and corrosion resistance, and is widely applied to the field of fluid transportation. The hot-pressed silicon nitride ceramic lining layer has stable chemical property, does not react with metal in a natural state, has high strength and hardness and has general shock resistance. But the metal outer layer and the hot-pressed silicon nitride ceramic are combined for use, so that the impact resistance of the hot-pressed silicon nitride ceramic lining layer is improved, the service life is prolonged, the corrosion of slurry with high abrasion and high corrosion to metal parts is prevented, the service life of the slurry pump is prolonged, the frequent replacement of the slurry pump in field use is avoided, and the cost of manpower and material resources is saved. And the surface of the hot-pressed silicon nitride ceramic lining layer is smooth, and the hot-pressed silicon nitride ceramic lining layer formed by pouring does not need to be machined, so that the machining cost is saved.
The thickness of the metal outer layers 410, 510 and the ceramic inner liners 420, 520 is selected according to the size and pressure of the bore of the slurry pump. The metal outer layers 410 and 510 are embedded with the ceramic inner liners 420 and 520, and certain gaps are reserved between the metal outer layers 410 and 510 and the ceramic inner liners 420 and 520 for preventing errors caused by production and processing, and macromolecule resin composite ceramic adhesives are filled in the gaps for adhesion, so that the metal outer layers 410 and 510 are tightly combined with the ceramic inner liners 420 and 520. The pump body 400 and the pump cover 500 are connected by the stud 10, so that the impeller is convenient to detach, and the sealing device is maintained. The middle open face 20 of the horizontal middle open structure is provided with a polytetrafluoroethylene sealing layer 30, and the polytetrafluoroethylene sealing layer 30 has excellent corrosion resistance.
The pump body 400 is connected with the bracket body 110 of the bearing housing assembly 100 through the bolt assembly 40, and the support legs 50 are arranged at the bottom of the pump body 400, so that the pump body 400 has a stable support structure, and the pump body 400 can be independently and fixedly supported after the pump cover 500 is opened.
The impeller 300 is made of a metal skeleton and a hot-pressed silicon nitride ceramic, and the metal skeleton and the hot-pressed silicon nitride ceramic are bonded by a polymer resin composite ceramic adhesive. The impeller 300 is a core of the pump, and transmits energy input from the motor to the slurry, so that the slurry obtains energy and is discharged from the pump to a designated place. The inlet of the slurry flow passage 310 of the impeller part 300 is in butt joint with a pump port, the pump port is connected with an inlet pipeline 70 by using a bolt member 60, the inlet pipeline 70 consists of an inlet flange 71, an outlet flange 73 and a middle taper pipe 72, wherein the flow passage in the middle taper pipe 72 is brushed with a polymer resin composite ceramic layer, and the wear resistance of the slurry flow passage is improved. The metal outer layers 410, 510 of the pump body 400 and the pump cover 500 connecting the inlet pipe 70 need to be thickened, and then the outer layers of the pump body 400 and the pump cover 500 are added with reinforcing ribs, so that the strength of the reinforcing ribs is increased, and the corresponding thickness of the reinforcing ribs is selected according to the pressure.
In this embodiment, the seal assembly includes a packing seal 800', and the packing seal 800' in this embodiment includes a secondary impeller 810 'and a packing 820'. The sub-impeller 810' is fixed to a side of the rotation shaft 200 near the impeller portion 300, and the packing 820' is disposed between the sub-impeller 810' and the bearing housing assembly 100. The sub-impeller 810' is connected to the rotation shaft 200 by a key. The water seal ring 821 'and the packing 822' are placed inside the packing body 820', the flushing part 823' is connected to the outside, and the packing cover 824 'is fastened on the packing 822' by bolts 825', so as to compress the packing 822', and prevent the medium from leaking. The outer surface of the secondary impeller 810' is provided with a polymer resin composite ceramic layer to increase the wear resistance thereof. The primary function of the secondary impeller 810' is to cooperate with a packing seal to reduce the flow of media into the seal member and to extend the seal member life.
The working principle of this embodiment is as follows:
When the device works, the driving device drives the main shaft 200 to rotate, the impeller part 300 starts to rotate, centrifugal force is generated by high-speed rotation of the impeller part 300, pressure is increased for slurry, the slurry is thrown into the volute 600 to be discharged from the outlet pipe under the action of the centrifugal force, and the purpose of delivering the slurry is achieved. When the main shaft 200 rotates, the auxiliary impeller 810 'is driven to rotate together, and the auxiliary impeller 810' mainly acts to match with the packing seal, so that the medium flowing into the sealing part is reduced, and the service life of the sealing part is prolonged.
When in maintenance, the condition in the pump can be checked by only opening the pump cover, and the packing gland is only required to be detached when the packing seal is replaced. Of course, the packing seal can also be replaced by a mechanical seal.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. Horizontal open slurry pump, its characterized in that includes:
A bearing housing assembly;
a spindle rotatably disposed on the bearing housing assembly;
an impeller portion connected to a first end of the main shaft;
the pump body and the pump cover are connected in a vertically covered mode to form a horizontally middle open structure, the pump body forms the lower half part of the horizontally middle open structure, the pump cover forms the upper half part of the horizontally middle open structure, the pump body and the pump cover both comprise a metal outer layer and a ceramic lining layer arranged on the inner wall of the metal outer layer, the ceramic lining layer of the pump body and the pump cover forms a volute chamber, and one side, close to a bearing box assembly, of the metal outer layer of the pump body and the pump cover forms a sealing cavity capable of containing a sealing assembly.
2. The horizontal mid-open slurry pump of claim 1, wherein the ceramic liner comprises a hot pressed silicon nitride ceramic liner.
3. The horizontal split slurry pump according to claim 1, wherein a gap is left between the ceramic inner liner and the metal outer layer, and an adhesive is filled in the gap, so that the ceramic inner liner and the metal outer layer are tightly combined.
4. The horizontal mid-open slurry pump of claim 1, wherein the mid-open face of the horizontal mid-open structure is provided with a polytetrafluoroethylene seal layer.
5. The horizontal split slurry pump of claim 1, wherein the seal assembly comprises a packing seal or a mechanical seal.
6. The horizontal split slurry pump according to claim 1, wherein the seal assembly comprises an auxiliary impeller friction auxiliary seal body, the auxiliary impeller friction auxiliary seal body comprises an auxiliary impeller rotatably arranged on a shaft section corresponding to the main shaft and the seal cavity, an inner annular groove is arranged in the middle of one end of the auxiliary impeller facing the impeller part, an outer annular groove is arranged on the periphery of one end of the auxiliary impeller facing the impeller part, a water inlet and a water outlet are arranged at positions between the inner annular groove and the outer annular groove of the metal outer layer or/and the metal outer layer of the pump cover, a first friction pair is arranged on the inner annular groove through a first elastic assembly, a second friction pair is arranged on the outer annular groove through a second elastic assembly, a first lower semi-annular cover plate corresponding to the first friction pair is arranged at one end of the metal outer layer facing the auxiliary impeller of the pump body, a first upper semi-annular cover plate corresponding to the first friction pair is arranged at one end of the metal outer layer facing the auxiliary impeller, a first lower semi-annular cover plate corresponding to the first friction pair is formed at one end of the metal outer layer facing the first auxiliary impeller of the pump body, a second semi-annular cover plate corresponding to the first friction pair is arranged at one end of the metal outer layer facing the first semi-annular cover plate of the first impeller of the pump, a second semi-annular cover plate corresponding to the first friction pair is arranged at one end of the first semi-annular cover plate corresponding to the first friction pair of the first impeller upper semi-annular cover plate, the area surrounded by the second annular cover plate forms a high-pressure cavity.
7. The horizontal split slurry pump according to claim 6, wherein a first annular retainer ring is arranged on one side, close to the high-pressure cavity, of one end of the first friction pair facing the first annular cover plate, a second annular retainer ring is arranged on one side, close to the high-pressure cavity, of one end of the second friction pair facing the second annular cover plate, a first arc-shaped surface recessed towards the impeller portion is arranged on one side, facing the high-pressure cavity, of the first annular cover plate, and a second arc-shaped surface recessed towards the impeller portion is arranged on one side, facing the high-pressure cavity, of the second annular cover plate.
8. The horizontal split slurry pump of claim 6 wherein the secondary impeller is removably connected to a secondary impeller hub that is keyed to the spindle.
9. The horizontal split slurry pump according to claim 1, wherein the pump body is connected to the bracket body of the bearing housing assembly by a bolt assembly, and a support leg is provided at the bottom of the pump body.
10. The horizontal split slurry pump according to claim 1, wherein the impeller portion is made of a metal skeleton and a hot-pressed silicon nitride ceramic, and the metal skeleton and the hot-pressed silicon nitride ceramic are bonded by a polymer resin composite ceramic adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410500950.4A CN118188507A (en) | 2024-04-24 | 2024-04-24 | Horizontal middle open type slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410500950.4A CN118188507A (en) | 2024-04-24 | 2024-04-24 | Horizontal middle open type slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118188507A true CN118188507A (en) | 2024-06-14 |
Family
ID=91396952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410500950.4A Pending CN118188507A (en) | 2024-04-24 | 2024-04-24 | Horizontal middle open type slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118188507A (en) |
-
2024
- 2024-04-24 CN CN202410500950.4A patent/CN118188507A/en active Pending
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