CN112727716A

CN112727716A - Become oar slide bearing, become oar device and wind generating set

Info

Publication number: CN112727716A
Application number: CN201910974175.5A
Authority: CN
Inventors: 黄琨; 彭云; 郑国龙
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Goldwind Science and Technology Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2021-04-30

Abstract

The embodiment of the application provides a become oar slide bearing, become oar device and wind generating set. This become oar slide bearing includes: a sliding collar and a sliding pad; the sliding ferrule is provided with a first embedding part which is used for embedding a corresponding structure corresponding to the hub; one of the opposite surfaces of the slide pad is fitted with the first fitting portion, and the other of the opposite surfaces of the slide pad is adapted to be fitted with the hub. Compared with a rolling bearing, the variable-pitch bearing adopting the unilateral sliding ferrule structure has the advantages that the inside of the bearing is in surface contact, the contact area is larger, and the impact resistance is high; the vibration of the bearing during operation is small and is quieter; by adopting the structure of the single-side sliding ferrule, the manufacturing difficulty of the variable pitch bearing is simplified, and the manufacturing cost of the variable pitch bearing is reduced.

Description

Become oar slide bearing, become oar device and wind generating set

Technical Field

The application relates to the technical field of wind power generation, in particular to a variable-pitch sliding bearing, a variable-pitch device and a wind generating set.

Background

The wind generating set usually needs to be pitched to change the aerodynamic characteristics of the wind generating set, so as to optimize the starting and braking performance, improve the wind energy utilization rate, stabilize the output power and the like. The pitch variation is that the blades rotate around the mounting shafts thereof relative to the hub by virtue of a pitch variation bearing, so as to change the pitch angle of the blades.

The existing pitch bearing is usually a rolling bearing and has the following defects: the impact resistance is poor; the vibration is large, and the noise is large; the bearing is difficult to manufacture and install. And with the increasing of the single machine power of the wind generating set, the higher and higher requirements are provided for the pitch bearing, the manufacturing difficulty of the rolling bearing for pitch changing is higher and higher, and the manufacturing cost is higher and higher.

Disclosure of Invention

The utility model provides a shortcoming to current mode provides a become oar slide bearing, becomes oar device and wind generating set for at least one technical problem in the above-mentioned defect that solves prior art and exists.

In a first aspect, an embodiment of the present application provides a pitch sliding bearing, including: a sliding collar and a sliding pad;

the sliding ferrule is provided with a first embedding part which is used for embedding a corresponding structure corresponding to the hub;

one of the opposite surfaces of the slide pad is fitted with the first fitting portion, and the other of the opposite surfaces of the slide pad is adapted to be fitted with the hub.

In a second aspect, an embodiment of the present application provides a pitch device, including: a hub and a pitch slide bearing as provided in the first aspect above;

the hub is provided with a second embedding part;

the first embedding part of the sliding ferrule in the variable-pitch sliding bearing is embedded with the second embedding part of the hub, and the other surface of the two opposite surfaces of the sliding gasket in the variable-pitch sliding bearing is matched with the second embedding part of the hub.

In a third aspect, an embodiment of the present application provides a wind turbine generator system, including a blade, the wind turbine generator system further includes: a pitch device as provided in the second aspect above;

the blade is connected with a sliding ferrule of a variable pitch sliding bearing in the variable pitch device.

The technical scheme provided by the embodiment of the application has the following beneficial technical effects:

1. compared with a conventional rolling bearing, the variable-pitch bearing adopting the sliding bearing structure has the advantages that point contact or line contact is changed into surface contact in the bearing, the contact area is larger, and the impact resistance is greatly improved;

2. the variable-pitch bearing adopting the sliding bearing structure has small vibration and is quieter when the bearing runs;

3. the variable pitch bearing adopts a single-side sliding ferrule structure, so that the number of ferrules is reduced, and the manufacturing cost of the variable pitch bearing is reduced; the variable-pitch bearing is embedded with the corresponding structure corresponding to the hub through the first embedding part, so that connecting bolts of the bearing and the hub are saved, parts are further reduced, and the use cost of the variable-pitch bearing is reduced;

4. the pitch bearing adopting the sliding bearing structure does not need to adopt an integral structure, is easy to realize a sectional structure, can reduce the volume during transportation, and reduces the transportation difficulty.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a first embodiment of a pitch control device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second embodiment of a pitch control device provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a third embodiment of a pitch control device provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a sliding ring in a pitch sliding bearing provided by an embodiment of the present application, which adopts a segmented structure;

FIG. 5 is a cross-sectional view taken along plane A-A of FIG. 4;

fig. 6 is a schematic structural diagram of a fourth implementation manner of a pitch control device provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a fifth implementation manner of a pitch control device provided in an embodiment of the present application;

in the figure, the position of the upper end of the main shaft,

100-pitch sliding bearings;

110-a sliding collar; 110 a-a first mating portion; 110a 1-first side; 110a 2-second side; 110a 3-third face; 111-ferrule section;

120-a sliding liner;

200-a hub; 200 a-a second mating portion; 210-a hub body; 220-a flange; 230-flange bolts;

300-blades; 300 a-blade bolt.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features and/or components, but do not preclude the presence or addition of one or more other features, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The inventor of the application researches and discovers that the existing variable pitch bearing is usually a rolling bearing, the rolling bearing generally consists of four parts, namely an inner ring, an outer ring, a rolling body and a retainer, and the inner ring is matched with the blades and rotates together with the blades; the outer ring is matched with the hub to play a supporting role; the retainer helps the rolling bodies to be evenly distributed between the inner ring and the outer ring, and the rolling bodies are guided to rotate for lubrication. However, the rolling elements of the rolling bearing have small contact area with the pipe on the inner ring or the outer ring, and are only in point contact (such as ball bearings) or line contact (such as cylindrical bearings), so that the impact resistance is poor; in order to adapt to the installation requirement of the rolling body, the rolling bearing has larger radial play, so that the rolling bearing has large vibration and large noise during operation; the inner ring and the outer ring of the rolling bearing are of an integral structure, and can not adopt a split structure, so that the bearing in the middle of the long shaft is difficult to install. And along with the increasing of the single machine power of the wind generating set, the manufacturing difficulty of the rolling bearing is increased more and more.

The application provides a become oar slide bearing, become oar device and wind generating set aims at solving prior art as above technical problem.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

The embodiment of the present application provides a variable pitch sliding bearing 100, and the structural schematic diagram of the variable pitch sliding bearing 100 is shown in fig. 1 to 7, and includes: a sliding collar 110 and a sliding pad 120;

the sliding collar 110 has a first fitting portion 110a, and the first fitting portion 110a is adapted to be fitted to a corresponding structure of the hub 200;

one of the opposite surfaces of the sliding pad 120 is fitted with the first fitting portion 110a, and the other of the opposite surfaces of the sliding pad 120 is used to be fitted with the hub 200.

According to the pitch sliding bearing 100 provided by the embodiment, a single-side sliding sleeve ring 110 structure is adopted, the first embedding part 110a on the sliding sleeve ring 110 is embedded with the corresponding structure of the hub 200, so that the positioning between the sliding sleeve ring 110 and the hub 200 is realized, and the sliding fit between the sliding sleeve ring 110 and the hub 200 is realized with the help of the sliding pad 120. The sliding collar 110 is used for connecting a blade 300 of a wind turbine generator system, and the sliding collar 110 and the hub 200 are driven to slide and rotate, so that the blade 300 can rotate around the installation shaft relative to the hub 200, the pitch angle of the blade 300 is changed, and the pitch change is realized.

Alternatively, the sliding pad 120 may be fixedly fitted on the first fitting portion 110a of the sliding collar 110; the sliding pad 120 may also be fixedly arranged on a corresponding structure of the hub 200; of course, the slide spacer 120 may be freely fitted between the first fitting portion 110a and the hub 200 without being fixed to the slide bearing ring 110 and the hub 200.

Compared with a conventional rolling bearing, the variable-pitch bearing provided by the embodiment has the advantages that the point contact or line contact is changed into surface contact in the bearing, the contact area is larger, and the impact resistance is greatly improved.

The variable-pitch bearing adopting the sliding bearing structure has small vibration and is quieter when the bearing runs.

The variable pitch bearing adopts a structure of the single-side sliding ferrule 110, the number of ferrules is reduced, the manufacturing cost of the variable pitch bearing is reduced, the material of the hub 200 is much cheaper than that of the ferrules, and even if the cost of the hub 200 matched with the single-side sliding ferrule 110 is calculated, the total manufacturing cost is lower than that of the variable pitch bearing with a double-ferrule structure; the variable pitch bearing is embedded with the corresponding structure corresponding to the hub 200 through the first embedding part 110a, so that a first connecting bolt of the bearing and the hub 200 is saved, parts are further reduced, and the use cost of the variable pitch bearing is reduced.

The pitch bearing adopting the sliding bearing structure does not need to adopt an integral structure, is easy to realize a sectional structure, can reduce the volume during transportation, and reduces the transportation difficulty.

The inventors of the present application consider that the first fitting portion 110a needs to be fitted to a corresponding structure corresponding to the hub 200. For this reason, the present application provides one possible implementation manner for the first fitting portion 110a of the sliding ferrule 110:

the first fitting portion 110a of the sliding ferrule 110 of the embodiment of the present application is an annular projection (as shown in fig. 1 to 7) or an annular groove coaxial with the sliding ferrule 110.

It is understood that the corresponding structure of the hub 200 is an annular groove corresponding to the first engaging portion 110a of the annular protrusion structure, or the corresponding structure of the hub 200 is an annular protrusion corresponding to the first engaging portion 110a of the annular groove structure.

The sliding ferrule 110 adopts the structure of the first engaging portion 110a provided by this embodiment, so that the sliding fit between the sliding ferrule 110 and the hub 200 is easier to position, the sliding pad 120 is easier to position and place, the effective engagement between the first engaging portion 110a of the sliding ferrule 110 and the hub 200 is ensured, and the installation difficulty is also reduced.

Alternatively, if the first engaging portion 110a of the sliding ferrule 110 is an annular protrusion coaxial with the sliding ferrule 110, the annular protrusion includes a plurality of protruding ring segments arranged at intervals. The material consumption of the first embedding part 110a can be reduced, and the weight of the sliding ring 110 is reduced, namely the weight of the whole pitch sliding bearing 100 is reduced.

It can be understood that if the first engaging portion 110a of the sliding sleeve 110 is an annular groove coaxial with the sliding sleeve 110, i.e. the corresponding structure of the hub 200 is an annular protrusion, the annular protrusion of the hub 200 may include several spaced-apart ring segments. The material consumption of the corresponding structure of the hub 200 can be reduced, and the weight of the hub 200 is reduced.

The inventors of the present application considered that the slide packing 120 needs to be fitted to the first fitting portion 110a of the slide collar 110 as well as to the hub 200. To this end, the present application provides one possible implementation for the sliding collar 110 as follows:

as shown in FIGS. 1 and 3, in the sliding ferrule 110 of the embodiment of the present application, the first engaging portion 110a has at least a first face 110a1 and a second face 110a2, the first face 110a1 and the second face 110a2 are arranged at an angle α, 0 ° ≦ α < 180 °, and the first face 110a1 and the second face 110a2 are respectively engaged with the sliding pad 120.

If 0 ° < α < 180 °, the first fitting portion 110a has a triangular or trapezoidal shape in the axial cross section of the sliding bush 110, and the sliding pad 120 receives radial and axial loads from between the sliding bush 110 and the hub 200.

If α is 0 °, the first fitting portion 110a has a rectangular shape or includes a rectangular portion in the axial cross section of the slide ring 110, and the slide packing 120 receives a radial load from between the slide ring 110 and the hub 200.

Alternatively, as shown in fig. 2 and 3, in the sliding ferrule 110 according to the embodiment of the present invention, the first engaging portion 110a further has a third surface 110a3, and the third surface 110a3 connects the first surface 110a1 and the second surface 110a 2. The first fitting portion 110a has a trapezoidal, or rectangular, or a shape including a rectangular portion in the axial section of the slide collar 110. That is, the sharpness of the annular protrusion or the annular groove of the first fitting portion 110a (i.e., the annular protrusion corresponding to the hub 200) is blunted, the stress concentration at the fitting portion of the sliding ferrule 110 and the hub 200 is reduced, the failure rate is reduced, and the service life is prolonged.

The inventors of the present application considered that, in the case where the first fitting portion 110a further includes the third surface 110a3, the sliding fit between the slide bearing ring 110 and the hub 200 can be further strengthened. To this end, the present application provides one possible implementation for the sliding collar 110 as follows:

as shown in fig. 2 and 3, in the first fitting portion 110a of the sliding collar 110 of the embodiment of the present application, the third face 110a3 is fitted to the sliding pad 120;

and/or the third face 110a3 is a plane or a curved face.

In this embodiment, the sliding gasket 120 on the third surface 110a3 can share the load borne by the sliding gasket 120 on the first surface 110a1 and the second surface 110a2, which is beneficial to reducing stress concentration and prolonging the service life of the component.

Optionally, when the third surface 110a3 is a curved surface, a joint between the third surface 110a3 and the first surface 110a1 and/or the second surface 110a2 is subjected to arc chamfering (e.g., rounding), so as to relieve stress concentration at the joint. Further, the third surface 110a3 is curved from two ends respectively connected with the first surface 110a1 and the second surface 110a2 to the middle, for example, the third surface 110a3 is a circular arc surface, the transition area is larger, and the transition surface can be more gradual.

The inventors of the present application have considered that the structure of the sliding collar 110 of the pitch sliding bearing 100 needs to facilitate a fitting installation with a corresponding structure on the hub 200. To this end, the present application provides one possible implementation for the sliding collar 110 as follows:

as shown in fig. 4 and 5, the sliding collar 110 of the embodiment of the present application includes a plurality of collar segments 111, and all the collar segments 111 are connected end to form a closed circular ring.

In this embodiment, the sliding collar 110 is of a sectional structure, so that all the collar segments 111 can be sequentially fitted with corresponding structures on the hub 200, thereby reducing the assembly difficulty.

Moreover, with the maximization of the wind generating set, the variable-pitch bearing is also bigger and bigger, and the problem of difficult transportation is brought by the overlarge volume of the variable-pitch bearing. The sliding ring 110 is of a sectional structure, so that the variable-pitch sliding bearing 100 can be stored or transported in the form of the ring section 111, the volume during storage or transportation can be reduced, and the storage area or the transportation difficulty can be reduced. And the sliding ferrule 110 adopts a sectional structure, so that only the abrasion section needs to be replaced during maintenance, and the use cost is greatly reduced.

Alternatively, the adjacent two sets of ring segments 111 of the sliding ring 110 may adopt a male port and female port matching manner, and may be fixed by a pin or a second connecting bolt penetrating through the corresponding male port and female port. For example, one connection end of one of the two adjacent collar segments 111 is a protrusion connection structure, the corresponding connection end of the other collar segment 111 is a groove connection structure matched with the protrusion, and the protrusion connection structure and the groove connection structure are both provided with mounting holes for fixing a plug pin or a second connecting bolt. When two adjacent sets of ring segments 111 are connected and spliced, the convex connecting structure at the connecting end of one set of ring segments 111 is matched with the concave connecting structure at the connecting end of the other set of ring segments 111, and the bolt is inserted into the mounting holes corresponding to the convex connecting structure and the concave connecting structure, or the second connecting bolt is spirally arranged in the mounting holes corresponding to the convex connecting structure and the concave connecting structure, so that further fastening is realized.

Based on the same inventive concept, an embodiment of the present application provides a pitch apparatus, a schematic structural diagram of the pitch apparatus is shown in fig. 1 to 3, 6 and 7, and the pitch apparatus includes: hub 200, and pitch slide bearing 100 as provided in any of the embodiments above;

the hub 200 has a second fitting portion 200 a;

the first fitting portion 110a of the sliding collar 110 in the pitch sliding bearing 100 is fitted with the second fitting portion 200a of the hub 200, and the other of the two opposite surfaces of the sliding pad 120 in the pitch sliding bearing 100 is fitted with the second fitting portion 200a of the hub 200.

In the pitch device provided in this embodiment, the pitch bearing employs the single-side sliding collar 110, and the corresponding structure of the hub 200 is matched, so that the blade 300 connected to the sliding collar 110 rotates around the mounting shaft thereof relative to the hub 200, thereby changing the pitch angle of the blade 300, that is, realizing pitch variation. The structure of the bearing is simplified, and the manufacturing difficulty and the manufacturing cost of the variable pitch bearing are reduced.

The inventors of the present application considered that the corresponding structure of the hub 200 needs to be fitted and slidably connected to the first fitting portion 110a of the sliding ferrule 110. For this reason, the present application provides one possible implementation manner for the corresponding structure of the hub 200 as follows:

as shown in fig. 6 and 7, the hub 200 of the embodiment of the present application includes a hub body 210 and a flange 220, wherein the hub body 210 and the flange 220 are coaxially sleeved and detachably connected;

the second fitting portion 200a is formed between the hub body 210 and the flange 220.

In the present embodiment, the second engaging portion 200a is formed between the hub body 210 and the flange 220, that is, the hub body 210 has an engaging structure capable of engaging with a portion of the first engaging portion 110a of the sliding collar 110 near the flange 200, the flange 220 also has an engaging structure capable of engaging with another portion of the first engaging portion 110a of the sliding collar 110 near the hub body 210, and the hub body 210 and the flange 220 cooperate to realize a sliding engagement with the first engaging portion 110a of the sliding collar 110 in the pitch sliding bearing 100. The hub body 210 and the flange 220 are manufactured separately, which can reduce the manufacturing difficulty of the hub 200.

Alternatively, the flange 220 may be coupled to the hub body 210 using flange bolts 230.

The inventor of the present application considers that, in order to change the pitch angle of the blade 300, the pitch device needs to provide not only the pitch sliding bearing 100 with the pitch degree of freedom, but also a pitch driving mechanism for providing the pitch driving force, and a pitch control mechanism for controlling the pitch process. Therefore, the application provides the following possible implementation mode for the variable-pitch device:

the pitch control device of the embodiment of the application further comprises: the variable-pitch driving mechanism and the variable-pitch control mechanism;

the pitch control mechanism includes: an angular proximity switch and a controller; the angle proximity switch comprises a detection piece and a detected piece, the detection piece is fixedly connected with the hub body 210 and is in communication connection with the controller, and the detected piece is fixedly connected with the sliding ferrule 110 of the variable-pitch sliding bearing 100; the pitch drive mechanism comprises: a servo motor, a gear and a gear ring; the servo motor is fixedly connected with the hub body 210, an output shaft of the servo motor is fixedly connected with a gear, the gear is meshed with a gear ring, the gear ring is fixedly connected with a sliding ferrule 110 of the variable-pitch sliding bearing 100, and the servo motor is in communication connection with the controller;

or, the pitch control mechanism comprises: an angular proximity switch and a controller; the angle proximity switch comprises a detection piece and a detected piece, the detection piece is fixedly connected with the hub body 210 and is in communication connection with the controller, and the detected piece is fixedly connected with the sliding ferrule 110 of the variable-pitch sliding bearing 100; the pitch drive mechanism comprises: a hydraulic cylinder and a hydraulic pump; the cylinder body of pneumatic cylinder is articulated mutually with wheel hub body 210, and the piston rod of pneumatic cylinder is articulated mutually with the slip lasso 110 of becoming oar slide bearing 100, and the hydraulic pump passes through hydraulic line and pneumatic cylinder intercommunication, and the hydraulic pump is connected with the controller communication.

In this embodiment, the controller of the pitch control mechanism may be a CPU, an MCU, or a TLC, and the controller controls the pitch drive mechanism to complete a pitch change operation, and communicates with the main controller of the wind turbine generator system through a fieldbus. The detecting member and the detected member of the angle proximity switch are respectively mounted on the hub body 210 (of course, the flange 220) and the sliding ferrule 110, and the controller determines the pitch state according to the detection result of the detecting member on the detected member.

When the variable pitch driving mechanism adopts a servo motor driving mode, the servo motor drives the gear to rotate, the gear is meshed with the gear ring, so that the gear ring is driven to rotate, the rotation of the gear ring drives the sliding ring 110 of the variable pitch sliding bearing 100 to rotate, so that the blade 300 connected with the sliding ring 110 rotates around the installation shaft of the blade relative to the hub 200, the pitch angle of the blade 300 is changed, and the variable pitch is realized.

Alternatively, the gear can be directly fixedly connected to the output shaft of the servo motor; the gear can also be an output gear of a gear box, an output shaft of the servo motor is in transmission connection with the gear box, and the gear box can adjust output torque.

When the variable pitch driving mechanism adopts a hydraulic driving mode, the hydraulic pump outputs pressure liquid into the hydraulic cylinder, so that a piston rod of the hydraulic cylinder pushes the sliding ring 110 of the variable pitch sliding bearing 100 to rotate relative to the hub 200, the blade 300 connected with the sliding ring 110 rotates around the installation shaft relative to the hub 200, and the pitch angle of the blade 300 is changed, namely, the variable pitch is realized.

Based on the same inventive concept, the wind turbine generator system provided in the embodiments of the present application includes a blade 300, and the wind turbine generator system further includes: a pitch arrangement as provided in any of the above embodiments;

the blade 300 is connected with the sliding collar 110 of the pitch sliding bearing 100 in the pitch arrangement.

Alternatively, the blade 300 and the sliding collar 110 are connected by a blade bolt 300 a.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

3. the variable pitch bearing adopts a structure of the single-side sliding ferrule 110, the number of ferrules is reduced, the manufacturing cost of the variable pitch bearing is reduced, the material of the hub 200 is much cheaper than that of the ferrules, and even if the cost of the hub 200 matched with the single-side sliding ferrule 110 is calculated, the total manufacturing cost is lower than that of the variable pitch bearing with a double-ferrule structure; the variable-pitch bearing is embedded with a corresponding structure corresponding to the hub 200 through the first embedding part 110a, so that a first connecting bolt of the bearing and the hub 200 is saved, parts are further reduced, and the use cost of the variable-pitch bearing is reduced;

4. the variable-pitch bearing adopting the sliding bearing structure does not need to adopt an integral structure, so that a sectional structure is easier to realize, the volume during transportation can be reduced, and the transportation difficulty is reduced;

5. the first tabling part 110a of the sliding ferrule 110 adopts the structure of the annular bulge or the annular groove which is coaxial with the sliding ferrule 110, so that the sliding fit between the sliding ferrule 110 and the hub 200 is easier to position, the sliding gasket 120 is easier to position and place, the effective tabling between the first tabling part 110a of the sliding ferrule 110 and the hub 200 is ensured, and the installation difficulty is also reduced;

6. if the first engaging portion 110a of the sliding sleeve 110 is an annular protrusion coaxial with the sliding sleeve 110, the annular protrusion includes a plurality of protruding ring segments arranged at intervals, so that the material consumption of the first engaging portion 110a can be reduced, the weight of the sliding sleeve 110 is reduced, that is, the weight of the entire pitch sliding bearing 100 is reduced;

7. the first face 110a1 and the second face 110a2 of the first fitting portion 110a are arranged at an angle α, and if 0 ° < α < 180 °, the first fitting portion 110a has a triangular or trapezoidal shape in the axial section of the sliding bush 110, and the sliding pad 120 will receive the radial and axial loads from between the sliding bush 110 and the hub 200; if α is 0 °, the first fitting portion 110a has a rectangular shape or includes a rectangular portion in the axial cross section of the sliding ring 110, and the sliding pad 120 receives a radial load from between the sliding ring 110 and the hub 200;

8. the first engaging portion 110a further has a third surface 110a3 connecting the first surface 110a1 and the second surface 110a2, and the third surface 110a3 can passivate the sharpness of the annular protrusion or the annular groove of the first engaging portion 110a (i.e., the annular protrusion corresponding to the hub 200), so as to reduce stress concentration at the matching position of the sliding ferrule 110 and the hub 200, reduce failure rate, and prolong service life;

9. the sliding ferrule 110 is of a sectional structure, so that all ferrule sections 111 can be sequentially embedded and mounted with corresponding structures on the hub 200, and the assembly difficulty is reduced; the variable-pitch sliding bearing 100 can be stored or transported in the form of the ferrule section 111, so that the volume during storage or transportation can be reduced, and the storage area or the transportation difficulty can be reduced. And the sliding ferrule 110 adopts a sectional structure, so that only the abrasion section needs to be replaced during maintenance, and the use cost is greatly reduced.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A pitch sliding bearing (100), characterized in that, comprising: a sliding collar (110) and a sliding gasket (120);

The sliding ferrule (110) has a first fitting portion (110a), and the first fitting portion (110a) is used for fitting with a corresponding structure corresponding to the wheel hub (200);

One of the two opposing surfaces of the sliding pad (120) is matched with the first fitting portion (110a), and the other surface of the two opposing surfaces of the sliding pad (120) is used for engaging with the wheel hub (200) FIT.

2 . The pitch sliding bearing ( 100 ) according to claim 1 , wherein the first fitting portion ( 110 a ) of the sliding ferrule ( 110 ) is coaxial with the sliding ferrule ( 110 ). 3 . The annular protrusion or annular groove.

3. The pitch sliding bearing (100) according to claim 2, characterized in that, if the first fitting part (110a) of the sliding ferrule (110) is the same as the sliding ferrule (110) The annular protrusion of the shaft includes several convex ring segments arranged at intervals.

4. The pitch sliding bearing (100) according to claim 1, wherein the first fitting portion (110a) has at least a first surface (110a1) and a second surface (110a2), the first surface (110a2) One surface (110a1) and the second surface (110a2) are arranged at an angle of α, 0°≤α<180°, the first surface (110a1) and the second surface (110a2) are respectively connected to the sliding bushing Pad (120) fits.

5. The pitch sliding bearing (100) according to claim 4, wherein the first fitting portion (110a) further has a third surface (110a3), and the third surface (110a3) is connected to the Describe the first surface (110a1) and the second surface (110a2).

6. The pitch sliding bearing (100) according to claim 5, wherein the third surface (110a3) cooperates with the sliding pad (120);

And/or, the third surface (110a3) is a plane or a curved surface.

7. The pitch sliding bearing (100) according to any one of claims 1-6, wherein the sliding ring (110) comprises several ring segments (111), all of which are (111) are connected end to end to form a closed ring.

8. A pitching device, characterized in that it comprises: a wheel hub (200), and the pitch sliding bearing (100) according to any one of the preceding claims 1-7;

The hub (200) has a second fitting portion (200a);

The first fitting portion (110a) of the sliding collar (110) in the pitch sliding bearing (100) is fitted with the second fitting portion (200a) of the wheel hub (200). In combination, the other surface of the two opposite surfaces of the sliding pad (120) in the pitch sliding bearing (100) is matched with the second fitting portion (200a) of the wheel hub (200).

9. The pitch device according to claim 8, wherein the hub (200) comprises a hub body (210) and a flange (220), the hub body (210) and the flange (220) ) coaxial sleeve and detachable connection;

The second fitting portion (200a) is formed between the hub body (210) and the flange (220).

10 . The pitch device according to claim 9 , wherein the pitch device further comprises: a pitch drive mechanism and a pitch control mechanism; 10 .

The pitch control mechanism includes: an angle proximity switch and a controller; the angle proximity switch includes a detection piece and a detected piece, the detection piece is fixedly connected with the hub body (210), and the detection piece is connected to the The controller is communicatively connected, and the detected piece is fixedly connected with the sliding ferrule (110) of the pitch sliding bearing (100); the pitch driving mechanism includes: a servo motor, a gear and a ring gear; The servo motor is fixedly connected with the hub body (210), the output shaft of the servo motor is fixedly connected with the gear, the gear is meshed with the ring gear, and the ring gear is connected with the pitch sliding bearing The sliding ferrule (110) of (100) is fixedly connected, and the servo motor is connected in communication with the controller;

Or, the pitch control mechanism includes: an angle proximity switch and a controller; the angle proximity switch includes a detection piece and a detected piece, the detection piece is fixedly connected with the hub body (210), and the detection piece is connected in communication with the controller, and the detected piece is fixedly connected with the sliding collar (110) of the pitch sliding bearing (100); the pitch driving mechanism includes: a hydraulic cylinder and a hydraulic pump; The cylinder body of the hydraulic cylinder is hinged with the hub body (210), the piston rod of the hydraulic cylinder is hinged with the sliding collar (110) of the pitch sliding bearing (100), and the hydraulic pump It communicates with the hydraulic cylinder through a hydraulic pipeline, and the hydraulic pump communicates with the controller.

11. A wind power generator set, comprising a blade (300), characterized in that, the wind power generator set further comprises: the pitch device according to any one of the preceding claims 8-10;

The blade (300) is connected with the sliding collar (110) of the pitch sliding bearing (100) in the pitch device.