CN214577554U - Bearing device and wind power generation equipment - Google Patents

Abstract

The bearing device comprises a bearing seat and a rotating shaft, wherein the bearing seat is provided with a mounting hole, the bearing seat comprises a first supporting end and a second supporting end which are sequentially distributed along the axial direction of the mounting hole, the first supporting end is provided with a first bearing assembly, and the second supporting end is provided with a second bearing assembly; the rotating shaft is arranged in the mounting hole, the axial direction of the rotating shaft is consistent with the axial direction of the mounting hole, the rotating shaft comprises a first connecting end and a second connecting end which are sequentially distributed along the axial direction of the rotating shaft, the first connecting end is rotatably connected with the first bearing assembly, the second connecting end is rotatably connected with the second bearing assembly, and the diameter of the first connecting end is larger than that of the second connecting end. The diameter of the first connecting end of the rotating shaft is larger than that of the second connecting end, so that the moment arm of a stress point on the rotating shaft is prolonged, the rotating shaft can bear larger bending moment, and the problem that one end of the rotating shaft of the bearing device is easy to deform after bearing larger bending moment is avoided.

Description

Bearing device and wind power generation equipment

Technical Field

The application relates to the technical field of wind power generation, in particular to a bearing device and wind power generation equipment.

Background

With the continuous decrease of non-renewable energy sources such as petroleum and minerals, the search for clean renewable energy sources becomes an important issue in the modern world. Wind energy has gained more and more attention as renewable and pollution-free natural energy, and wind power generation equipment is increasingly widely applied.

The bearing device is an important part of the wind power generation equipment, the service life of the bearing device directly influences the service life of the wind power generation equipment, the bearing device generally comprises a bearing seat, a bearing and a rotating shaft rotatably installed in the bearing seat, and one end of the rotating shaft is connected with a fan blade of the wind power generation equipment through a hub.

Wherein, the gravity of flabellum can act on the pivot, makes the pivot bear great moment of flexure, appears the problem of deformation easily.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a bearing device and wind power generation equipment, and aims to solve the problem that one end of a rotating shaft of the bearing device is easy to deform after bearing a large bending moment.

The embodiment of the present application provides a bearing device, bearing device includes:

the bearing seat is provided with a mounting hole and comprises a first supporting end and a second supporting end which are sequentially distributed along the axial direction of the mounting hole, the first supporting end is provided with a first bearing assembly, and the second supporting end is provided with a second bearing assembly;

the rotating shaft is arranged in the mounting hole, the axial direction of the rotating shaft is consistent with the axial direction of the mounting hole, the rotating shaft comprises a first connecting end and a second connecting end which are sequentially distributed along the axial direction of the rotating shaft, the first connecting end is rotatably connected with the first bearing assembly, the second connecting end is rotatably connected with the second bearing assembly, and the diameter of the first connecting end is larger than that of the second connecting end.

Optionally, the rotating shaft includes a first shaft section, a middle shaft section and a second shaft section, which are sequentially connected in a direction from the first connecting end to the second connecting end, and a diameter of the first shaft section is larger than a diameter of the second shaft section;

the first bearing assembly comprises a plurality of first sliding bearing pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of first sliding bearing pads are in sliding abutting joint with the outer circumferential surface of the first shaft section; and/or the second bearing assembly comprises a plurality of second sliding bearing pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of second sliding bearing pads are in sliding abutting joint with the outer circumferential surface of the second shaft section.

Optionally, the first connection end of the rotating shaft is connected with a first abutting portion, one side of the first abutting portion in the direction from the first connection end to the second connection end is provided with a first sliding surface, and the first sliding surface extends along the circumferential direction of the rotating shaft to form an annular structure; the first bearing assembly comprises a plurality of first thrust pads which are sequentially distributed along the circumferential direction of the mounting hole, and the first thrust pads are in sliding abutting joint with the first sliding surface.

Optionally, a second connecting end of the rotating shaft is connected to a second abutting portion, a second sliding surface is arranged on one side of the second abutting portion along a direction from the second connecting end to the first connecting end, and the second sliding surface extends along the circumferential direction of the rotating shaft to form an annular structure; the second bearing assembly comprises a plurality of second thrust pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of second thrust pads are in sliding abutting joint with the second sliding surface.

Optionally, a ratio of the diameters of the first connection end and the second connection end is greater than or equal to 1.3 and less than or equal to 1.8.

Optionally, the ratio of the diameter of the first connection end to the length of the rotating shaft is greater than or equal to 0.6 and less than or equal to 1; the ratio of the diameter of the second connecting end to the length of the rotating shaft is greater than or equal to 0.6 and less than or equal to 1.

Optionally, a through hole is formed in the rotating shaft, and the through hole penetrates through the rotating shaft along the axial direction of the rotating shaft.

Optionally, the first connecting end of the rotating shaft is provided with a first reinforcing part, and the first reinforcing part is convexly arranged on the inner surface of the through hole and extends along the circumferential direction of the through hole.

Optionally, a second reinforcing portion is disposed at the second connecting end of the rotating shaft, and the second reinforcing portion is convexly disposed on the inner surface of the through hole and extends along the circumferential direction of the through hole.

An embodiment of the present application further provides a wind power generation device, including:

a mounting seat;

a bearing device as described above, the bearing device comprising:

the bearing seat is arranged on the mounting seat and provided with a mounting hole, the bearing seat comprises a first supporting end and a second supporting end which are sequentially distributed along the axial direction of the mounting hole, the first supporting end is provided with a first bearing assembly, and the second supporting end is provided with a second bearing assembly;

the rotating shaft is arranged in the mounting hole, the axial direction of the rotating shaft is consistent with the axial direction of the mounting hole, the rotating shaft comprises a first connecting end and a second connecting end which are sequentially distributed along the axial direction of the rotating shaft, the first connecting end is rotatably connected with the first bearing assembly, the second connecting end is rotatably connected with the second bearing assembly, and the diameter of the first connecting end is larger than that of the second connecting end;

the blade is connected with a rotating shaft of the bearing device;

the generator comprises a stator and a rotor, wherein the stator is connected with the bearing seat, and the rotor is connected with the rotating shaft.

The bearing device provided by the embodiment of the application can enable the stress point of the first bearing assembly of the first connecting end of the rotating shaft to be far away from the rotating axis of the rotating shaft by enabling the diameter of the first connecting end of the rotating shaft to be larger than that of the second connecting end, so that the force arm of the stress point on the rotating shaft is prolonged, the rotating shaft can bear larger bending moment, and the problem that one end of the rotating shaft of the bearing device is easy to deform after bearing larger bending moment is avoided.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of an embodiment of a wind power plant provided by an embodiment of the present application, the cross-sectional view being taken along an axial direction of a rotating shaft;

FIG. 2 is a schematic structural diagram illustrating an embodiment of a bearing assembly according to an embodiment of the present disclosure;

fig. 3 is an enlarged view of a portion a in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application provides a bearing device and wind power generation equipment. The following are detailed below.

Firstly, the embodiment of the application provides a bearing device, which comprises a bearing seat and a rotating shaft, wherein the bearing seat is provided with a mounting hole, the bearing seat comprises a first supporting end and a second supporting end which are sequentially distributed along the axial direction of the mounting hole, the first supporting end is provided with a first bearing assembly, and the second supporting end is provided with a second bearing assembly; the rotating shaft is arranged in the mounting hole, the axial direction of the rotating shaft is consistent with the axial direction of the mounting hole, the rotating shaft comprises a first connecting end and a second connecting end which are sequentially distributed along the axial direction of the rotating shaft, the first connecting end is rotatably connected with the first bearing assembly, the second connecting end is rotatably connected with the second bearing assembly, and the diameter of the first connecting end is larger than that of the second connecting end.

FIG. 1 is a cross-sectional view of an embodiment of a wind power plant provided by an embodiment of the present application, the cross-sectional view being taken along an axial direction of a rotating shaft. As shown in fig. 1, the wind power generation apparatus 100 includes a mounting base (not shown), a bearing device 120, a blade (not shown), and a generator 110.

As shown in fig. 1 and 2, the bearing device 120 includes a bearing housing 121 and a rotating shaft 122, the bearing housing 121 has a mounting hole 1211, the rotating shaft 122 is mounted in the mounting hole 1211, an axial direction of the rotating shaft 122 is identical to an axial direction of the mounting hole 1211, and the rotating shaft 122 is rotatably supported in the mounting hole 1211 through the bearing structure 125. When the bearing device 120 is used in the wind power generation apparatus 100, the bearing housing 121 of the bearing device 120 is mounted on the mounting seat, the blades of the wind power generation apparatus 100 are connected to the rotating shaft 122 of the bearing device 120, the generator 110 includes the stator 111 and the rotor 112, the stator 111 of the generator 110 is connected to the bearing housing 121, and the rotor 112 is connected to the rotating shaft 122. When the wind pushes the blades, the wind drives the rotating shaft 122 to rotate, and the rotating shaft 122 drives the rotor 112 in the generator 110 to rotate relative to the stator 111 to generate electricity, so as to realize the conversion from wind energy to electric energy.

The generator 110 is an outer rotor generator, that is, the rotor 112 of the generator 110 is located radially outside the stator 111, so that the connection between the generator 110 and the bearing device 120 is more convenient, and the structure is more compact after the generator 110 and the bearing device 120 are connected together. Of course, the generator 110 may be an internal rotor generator or other type of generator, and is not limited herein.

It should be noted that the bearing device 120 of the embodiment of the present application may be used in a hydro-power generation plant or any other plant requiring the bearing device 120 of the embodiment of the present application, besides the wind power generation plant 100. The technical solution of the bearing device 120 for the wind power generation equipment 100 is only one use scenario of the bearing device 120, and the bearing device 120 is not limited to be used only in the wind power generation equipment 100.

In some embodiments, as shown in fig. 2, bearing housing 121 includes first and second support ends 1212 and 1213 sequentially distributed along an axial direction of mounting bore 1211, bearing structure 125 includes first and second bearing assemblies 1251 and 1252, first support end 1212 is provided with first bearing assembly 1251, second support end 1213 is provided with second bearing assembly 1252, shaft 122 includes first and second connection ends 1221 and 1222 sequentially distributed along an axial direction thereof, first connection end 1221 of shaft 122 corresponds in position to first support end 1212 of bearing housing 121, second connection end 1222 of shaft 122 corresponds in position to second support end 1213 of bearing housing 121, first connection end 1221 is rotatably connected to first bearing assembly 1251, and second connection end 1222 is rotatably connected to second bearing assembly 1252.

When the bearing device 120 is used in the wind power generation apparatus 100, the first connection end 1221 of the rotation shaft 122 is connected to the blade through the hub (not shown in the figure), the load applied to the rotation shaft 122 by the blade and the hub is mainly a bending moment, and the rotation shaft 122 can be more stably rotatably connected to the bearing housing 121 by providing the first bearing assembly 1251 and the second bearing assembly 1252 at the first connection end 1221 and the second connection end 1222 of the bearing housing 121 to rotatably support the first connection end 1221 and the second connection end 1222 of the rotation shaft 122, respectively.

In this case, the diameter of the first connection end 1221 may be made larger than the diameter of the second connection end 1222.

It can be understood that the main load of the rotating shaft 122 of the bearing device 120 is a bending moment, and by making the diameter of the first connecting end 1221 larger than the diameter of the second connecting end 1222, the force bearing point of the first bearing assembly 1251 of the first connecting end 1221 of the rotating shaft 122 can be far away from the rotating shaft 122 line of the rotating shaft 122, so that the moment arm of the force bearing point on the rotating shaft 122 is extended, the rotating shaft 122 can bear a larger bending moment, and the problem that one end of the rotating shaft 122 of the bearing device 120 is easy to deform after bearing a larger bending moment is avoided.

It should be noted that in the present application, the diameter of the first connection end 1221 of the rotating shaft 122 refers to the minimum diameter of the rotating shaft 122 rotatably connected to the first bearing assembly 1251, and the diameter of the second connection end 1222 of the rotating shaft 122 refers to the minimum diameter of the rotating shaft 122 rotatably connected to the second bearing assembly 1252.

Alternatively, the ratio of the diameters of the first connection end 1221 and the second connection end 1222 of the rotating shaft 122 may be greater than or equal to 1.3 and less than or equal to 1.8, so that the rotating shaft 122 can bear a large bending moment while avoiding the overall weight or volume of the bearing device 120 from being affected by an excessive load or volume of the shaft. The ratio of the diameters of the first connection end 1221 and the second connection end 1222 of the rotating shaft 122 may be specifically 1.4, 1.5, 1.6, and the like, which is not limited herein.

Alternatively, the ratio of the diameter of the first connection end 1221 of the rotating shaft 122 to the length of the rotating shaft 122 in the axial direction thereof may be greater than or equal to 0.6, so as to avoid that the length of the bearing is too long relative to the diameter of the first connection end 1221, which results in an excessively long overall length of the bearing device 120, which is inconvenient to install into the wind power generation apparatus 100. Meanwhile, the ratio of the diameter of the first connection end 1221 of the rotating shaft 122 to the length of the rotating shaft 122 in the axial direction thereof may be smaller than or equal to 1, so as to avoid that the first connection end 1221 and the second connection end 1222 of the rotating shaft 122 are too close to each other, and the connection stability of the rotating shaft 122 and the bearing seat 121 is affected.

Likewise, the ratio of the diameter of the second connecting end 1222 of the rotating shaft 122 to the length of the rotating shaft 122 in the axial direction thereof may be greater than or equal to 0.6, so as to avoid the length of the bearing being too long relative to the diameter of the second connecting end 1222, resulting in an excessively long overall length of the bearing device 120, which is inconvenient to install into the wind power generating apparatus 100. Meanwhile, the ratio of the diameter of the second connecting end 1222 of the rotating shaft 122 to the length of the rotating shaft 122 in the axial direction thereof may be smaller than or equal to 1, so as to avoid that the first connecting end 1221 and the second connecting end 1222 of the rotating shaft 122 are too close to affect the connection stability of the rotating shaft 122 and the bearing seat 121.

Alternatively, as shown in fig. 2, the rotation shaft 122 may include a first shaft section 1224, an intermediate shaft section 1225, and a second shaft section 1226 connected in sequence in a direction from the first connection end 1221 to the second connection end 1222, the first shaft section 1224 having a diameter larger than that of the second shaft section 1226, the first bearing assembly 1251 abutting a surface of the first connection end 1221 of the rotation shaft 122 and rotatably supporting the first connection end 1221 of the rotation shaft 122, and the second bearing assembly 1252 abutting a surface of the second connection end 1222 of the rotation shaft 122 and rotatably supporting the second connection end 1222 of the rotation shaft 122.

Among them, the first bearing assembly 1251 may include a plurality of first sliding bearing shoes 1251a sequentially distributed in a circumferential direction of the mounting hole 1211, and the plurality of first sliding bearing shoes 1251a slidably abut against an outer circumferential surface of the first connection end 1221 of the rotation shaft 122 to rotatably support the first connection end 1221 of the rotation shaft 122.

Alternatively, the first bearing assembly 1251 may include an annular sliding bearing shoe or rolling bearing. Of course, when the first bearing assembly 1251 includes a plurality of first sliding bearing shoes 1251a, the life of the first bearing assembly 1251 can be made longer, the assembly can be made more convenient, and the rotating shaft 122 can be supported more stably.

Similarly, the second bearing assembly 1252 includes a plurality of second sliding bearing shoes 1252a distributed in sequence along the circumferential direction of the mounting hole 1211, the plurality of second sliding bearing shoes 1252a slidably abutting against the outer circumferential surface of the second connecting end 1222 of the rotating shaft 122 to rotatably support the second connecting end 1222 of the rotating shaft 122.

Alternatively, the second bearing assembly 1252 may include an annular sliding bearing shoe or rolling bearing. Of course, when the second bearing assembly 1252 includes a plurality of second sliding bearing shoes 1252a, the life of the second bearing assembly 1252 can be made longer, the assembly can be made more convenient, and the rotating shaft 122 can be supported more stably.

It should be noted that the first bearing assembly 1251 can be comprised of a plurality of first sliding bearing shoes 1251a and the second bearing assembly 1252 can be comprised of a plurality of second sliding bearing shoes 1252a, the first bearing assembly 1251 can be comprised of a plurality of first sliding bearing shoes 1251a and the second bearing assembly 1252 can be another type of bearing, or the first bearing assembly 1251 can be another type of bearing and the second bearing assembly 1252 can be comprised of a plurality of second sliding bearing shoes 1252 a.

As shown in fig. 2, the first connection end 1221 of the rotating shaft 122 is further connected to a first abutting portion 123, the first abutting portion 123 has a first sliding surface 1231 along one side of the first connection end 1221 to the second connection end 1222, the first sliding surface 1231 extends along the circumferential direction of the rotating shaft 122 to form an annular structure, and the first sliding surface 1231 is used for directly or indirectly abutting against an end surface of the first support end 1212 of the bearing seat 121 to limit the rotating shaft 122 from moving along the direction of the first connection end 1221 to the second connection end 1222 relative to the bearing seat 121.

Similarly, the second connection end 1222 of the rotation shaft 122 is further connected with a second contact portion 124, the second contact portion 124 has a second sliding surface 1241 along one side of the second connection end 1222 in the direction of the first connection end 1221, the second sliding surface 1241 extends in a ring shape along the circumferential direction of the rotation shaft 122, and the second sliding surface 1241 is used for directly or indirectly contacting with the end surface of the second support end 1213 of the bearing seat 121 so as to limit the rotation shaft 122 from moving in the direction of the second connection end 1222 in the direction of the first connection end 1221 relative to the bearing seat 121.

As shown in fig. 2, the first bearing assembly 1251 may further include a plurality of first thrust shoes 1251b sequentially distributed along the circumferential direction of the mounting hole 1211, and the plurality of first thrust shoes 1251b are slidably abutted against the first sliding surface 1231 to limit the movement of the rotating shaft 122 relative to the bearing seat 121 along the direction from the first connecting end 1221 to the second connecting end 1222.

In addition, the second bearing assembly 1252 may include a plurality of second thrust shoes 1252b distributed in sequence along the circumferential direction of the mounting hole 1211, the plurality of second thrust shoes 1252b slidably abutting the second sliding surface 1241 to restrict the movement of the rotating shaft 122 relative to the bearing housing 121 in the direction from the second connecting end 1222 to the first connecting end 1221.

In the embodiment of the present invention, the plurality of first thrust tiles 1251b are provided at the first support end 1212 of the bearing housing 121, so that the plurality of first thrust tiles 1251b are slidably abutted against the first sliding surface 1231 of the rotating shaft 122, and the plurality of second thrust tiles 1252b are provided at the second support end 1213 of the bearing housing 121, so that the plurality of second thrust tiles 1252b are slidably abutted against the second sliding surface 1241 of the rotating shaft 122, thereby restricting the sliding direction of the rotating shaft 122 relative to the bearing housing 121 along the axial direction of the rotating shaft 122, and preventing the rotating shaft 122 from coming out of the mounting hole 1211 of the bearing housing 121.

As shown in fig. 2, a first positioning protrusion 1232 is convexly disposed on a side surface of the first abutting portion 123 facing away from the bearing seat 121, the first positioning protrusion 1232 extends along a circumferential direction of the rotating shaft 122 to form an annular structure, correspondingly, a second positioning groove is disposed at a position corresponding to a hub (not shown in the figure) of the wind turbine 100, when the first connecting end 1221 of the rotating shaft 122 is connected to the hub, the first positioning protrusion 1232 is inserted into the second positioning groove to position the rotating shaft 122 and the hub, so as to prevent the hub from moving along a radial direction of the rotating shaft 122 relative to the rotating shaft 122, thereby facilitating connection between the rotating shaft 122 and the hub.

Alternatively, as shown in fig. 2, a through hole 1227 is formed in the rotating shaft 122, and the through hole 1227 penetrates through the rotating shaft 122 along the axial direction of the rotating shaft 122, so as to reduce the weight of the rotating shaft 122 while ensuring the strength of the rotating shaft 122.

The first connection end 1221 of the rotating shaft 122 may be provided with a first reinforcing portion 1228, the first reinforcing portion 1228 is protruded from an inner surface of the through hole 1227 and extends along a circumferential direction of the through hole 1227, so as to improve strength of the first connection end 1221 of the rotating shaft 122, and make connection between the first connection end 1221 of the rotating shaft 122 and the hub more stable.

In addition, a second reinforcing portion 1229 may be disposed at the second connecting end 1222 of the rotating shaft 122, and the second reinforcing portion 1229 is protruded at an inner surface of the through hole 1227 and extends along a circumferential direction of the through hole 1227, so that the connection between the second connecting end 1222 of the rotating shaft 122 and the second abutting portion 124 is more stable.

It should be noted that, the first reinforcing portion 1228 may be provided at the first connection end 1221 of the rotation shaft 122, the second reinforcing portion 1229 may be provided at the second connection end 1222 of the rotation shaft 122, the first reinforcing portion 1228 may be provided only at the first connection end 1221 of the rotation shaft 122, or the second reinforcing portion 1229 may be provided only at the second connection end 1222 of the rotation shaft 122, which may further improve the structural strength of the rotation shaft 122.

The embodiment of the utility model provides a still provide a wind power generation equipment, this wind power generation equipment includes bearing device, and above-mentioned embodiment is referred to this bearing device's concrete structure, because this wind power generation equipment has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The bearing device and the wind power generation equipment provided by the embodiment of the present application are described in detail above, and the principle and the embodiment of the present application are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. A bearing device, characterized in that the bearing device comprises:

the bearing seat is provided with a mounting hole and comprises a first supporting end and a second supporting end which are sequentially distributed along the axial direction of the mounting hole, the first supporting end is provided with a first bearing assembly, and the second supporting end is provided with a second bearing assembly;

the rotating shaft is arranged in the mounting hole, the axial direction of the rotating shaft is consistent with the axial direction of the mounting hole, the rotating shaft comprises a first connecting end and a second connecting end which are sequentially distributed along the axial direction of the rotating shaft, the first connecting end is rotatably connected with the first bearing assembly, the second connecting end is rotatably connected with the second bearing assembly, and the diameter of the first connecting end is larger than that of the second connecting end.

2. The bearing device according to claim 1, wherein the rotating shaft includes a first shaft section, a middle shaft section and a second shaft section connected in sequence in a direction from the first connecting end to the second connecting end, the first shaft section having a diameter larger than that of the second shaft section;

the first bearing assembly comprises a plurality of first sliding bearing pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of first sliding bearing pads are in sliding abutting joint with the outer circumferential surface of the first shaft section; and/or the second bearing assembly comprises a plurality of second sliding bearing pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of second sliding bearing pads are in sliding abutting joint with the outer circumferential surface of the second shaft section.

3. The bearing device according to claim 1, wherein the first connecting end of the rotating shaft is connected with a first abutting portion, the first abutting portion has a first sliding surface along one side in the direction from the first connecting end to the second connecting end, and the first sliding surface extends in the circumferential direction of the rotating shaft to form an annular structure; the first bearing assembly comprises a plurality of first thrust pads which are sequentially distributed along the circumferential direction of the mounting hole, and the first thrust pads are in sliding abutting joint with the first sliding surface.

4. The bearing device according to claim 3, wherein a second abutting portion is connected to the second connecting end of the rotating shaft, and the second abutting portion has a second sliding surface along one side in a direction from the second connecting end to the first connecting end, and the second sliding surface extends in a ring-shaped configuration along a circumferential direction of the rotating shaft; the second bearing assembly comprises a plurality of second thrust pads which are sequentially distributed along the circumferential direction of the mounting hole, and the plurality of second thrust pads are in sliding abutting joint with the second sliding surface.

5. The bearing assembly of any one of claims 1 to 4, wherein a ratio of the diameters of the first connection end to the second connection end is greater than or equal to 1.3 and less than or equal to 1.8.

6. The bearing apparatus of claim 5, wherein a ratio of a diameter of the first connection end to a length of the rotation shaft is greater than or equal to 0.6 and less than or equal to 1; the ratio of the diameter of the second connecting end to the length of the rotating shaft is greater than or equal to 0.6 and less than or equal to 1.

7. The bearing device according to any one of claims 1 to 4, wherein a through hole is formed in the rotating shaft, and the through hole penetrates through the rotating shaft in an axial direction of the rotating shaft.

8. The bearing device as claimed in claim 7, wherein the first connection end of the rotation shaft is provided with a first reinforcing portion which is protruded on an inner surface of the through hole and extends in a circumferential direction of the through hole.

9. The bearing device according to claim 7, wherein the second connecting end of the rotating shaft is provided with a second reinforcing portion which is provided to protrude from an inner surface of the through hole and extends in a circumferential direction of the through hole.

10. A wind power plant, characterized in that it comprises:

a mounting seat;

a bearing device as claimed in any one of claims 1 to 9, the bearing housing of the bearing device being mounted on the mounting block;

the blade is connected with a rotating shaft of the bearing device;

the generator comprises a stator and a rotor, wherein the stator is connected with the bearing seat, and the rotor is connected with the rotating shaft.

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