Variable pitch bearing assembly of wind turbine
By changing the ball bearing cavity distribution and adding an arc-shaped section and buffer assembly in the pitch bearing of the wind turbine, the bearing damage caused by pitch blade vibration was solved, the bearing service life was extended and the reliability was improved.
Patent Information
- Application Number
- CN202520575858.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-03-31
AI Technical Summary
When the pitch bearing of a wind turbine is in pitch operation, the vibration of the pitch blades causes the upper and lower sides of the inner and outer ring ball cavities to collide and be subjected to force. Over time, this accelerates bearing damage and affects bearing quality.
The traditional left-right distributed ball bearing cavities are changed to a top-bottom distributed cavities, and arc-shaped parts are set at the collision points of the outer and inner rings with the ball bearings. Combined with a buffer assembly consisting of a fixed frame, sliding frame, buffer plate and spring, the impact force is reduced.
It effectively extends the service life of bearings, reduces the force of direct impact, and improves the reliability and durability of bearings.
Smart Images
Figure CN223814132U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fan variable pitch technical field, concretely is a kind of wind turbine variable pitch bearing assembly. BACKGROUND
[0002] The working environment of wind turbine variable pitch bearing is mostly wind sand, rain, humidity and low temperature and other adverse conditions, plus installation and maintenance are very inconvenient, therefore, variable pitch bearing not only needs enough strength to bear combined load, simultaneously also requires that it has good sealing property and high reliability.In recent years, many domestic and foreign enterprises have reached the requirements of scale, standard and other aspects in the production of wind power bearing.The products of traditional bearing enterprise company enjoy great fame in the global wind power bearing industry, and the main performance indicators of the products, such as reliability and service life, all meet the use requirements of wind turbine generator system.After ten years of development, domestic wind power special bearing field has made great progress, and certain achievements have been made in bearing self-production, research and development design, but compared with foreign well-known bearing companies, there is still a big gap in market share and basic research, and China still needs continuous exploration and innovation in basic technology research and later production and manufacturing.
[0003] When the fan is in variable pitch action, the variable pitch blade is connected with the fan through the variable pitch bearing, and the variable pitch blade is driven to rotate through the rotation of the variable pitch bearing, so as to adjust the angle of the variable pitch blade.In actual use process, the variable pitch blade will vibrate slightly by itself, which drives the outer ring of the bearing to vibrate back and forth, and then causes the upper and lower sides of the ball cavity of the inner and outer rings to contact and collide with the ball (such as Figure 4 ), which accelerates the damage of the bearing for a long time, seriously affects the quality of the bearing, therefore, a kind of wind turbine variable pitch bearing assembly is proposed for the above problems. CONTENT OF UTILITY MODEL
[0004] The utility model aims at providing a kind of wind turbine variable pitch bearing assembly to solve the problems raised in the above background technology.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] As an optional scheme of the wind turbine variable pitch bearing assembly of the utility model, the wind turbine variable pitch bearing assembly comprises an outer ring and an inner ring,
[0007] The outer ring is provided with the inner ring on one side, and the outer ring and the inner ring are connected with the ball in rolling connection, the ball is provided with the buffer assembly on both sides, and the buffer assemblies on both sides are respectively fixedly connected with the outer ring and the inner ring.
[0008] The ball is provided with the arc-shaped part on both sides, and the outer side of the arc-shaped part is respectively fixedly connected with the outer ring and the inner ring.
[0009] As an optional scheme of the wind turbine variable pitch bearing assembly, one side of the arc-shaped part is arranged in an arc surface.
[0010] When the fan is in the variable pitch action, the variable pitch blade is connected with the fan through the variable pitch bearing, the variable pitch blade is driven to rotate through the variable pitch bearing, and then the angle of the variable pitch blade is adjusted. In actual use, the variable pitch blade may vibrate slightly, the outer ring of the bearing vibrates back and forth, and then the upper and lower sides of the ball cavity of the inner and outer rings are in contact and collision with the ball, which causes stress, accelerates the damage of the bearing for a long time, seriously affects the quality of the bearing, the left and right distributed ball cavities arranged in the outer ring and the inner ring are changed into the upper and lower distributed ball cavities, when the variable pitch blade vibrates to drive the outer ring and the inner ring to vibrate back and forth, the force between the outer ring, the inner ring and the ball can be effectively reduced, the normal service life of the bearing is effectively ensured, and the arc-shaped part is arranged at the collision position of the outer ring, the inner ring and the ball, so that the direct collision force can be effectively reduced and a certain buffering effect is achieved.
[0011] As an optional scheme of the wind turbine variable pitch bearing assembly, the buffer assembly comprises a fixed frame and a sliding frame, the outer side of the fixed frame on one side is fixedly connected with the outer ring, the outer side of the fixed frame on the other side is fixedly connected with the inner ring, the sliding frame is slidably connected in the fixed frame, and the other side of the sliding frame is fixedly connected with a buffer plate.
[0012] As an optional scheme of the wind turbine variable pitch bearing assembly, the sliding frame is fixedly connected with a spring, and the other end of the spring is fixedly connected with the fixed frame.
[0013] As an optional scheme of the wind turbine variable pitch bearing assembly, the upper and lower sides of the sliding frame are provided with sliding grooves, the sliding frame is slidably connected with a limiting block through the sliding grooves, and the outer side of the limiting block is fixedly connected with the fixed frame.
[0014] In addition, the fixed frame, the sliding frame and the buffer plate are further arranged in the outer ring and the inner ring, when the arc-shaped part of the outer ring and the inner ring moves, the buffer plate on one side of the sliding frame in the fixed frame is contacted, the spring can play a buffering role, the limiting block is arranged to ensure that the sliding frame stably slides, and the sliding frame and the fixed frame are prevented from being separated.
[0015] Compared with the prior art, the wind turbine variable pitch bearing assembly has the advantages that:
[0016] The utility model discloses a traditional left and right distribution's ball chamber that sets in the outside ring and the inside ring is changed to the ball chamber of upper and lower distribution, when the outside ring and the inside ring come and go the tremble, can effectively alleviate the force of action of the outside ring and the inside ring and the ball, effectively guarantee the normal service life of bearing.
[0017] And the arc shape of the arc part of the outside ring and the inside ring and the ball collision part is set, at this time, the acting force of direct collision can be effectively reduced, and a certain buffering effect is achieved.
[0018] And the fixed frame, sliding frame and buffer plate are further arranged in the inside of the outside ring and the inside ring, when the arc part of the outside ring and the inside ring moves, the buffer plate on one side of the sliding frame in the fixed frame is contacted, the spring is arranged and can achieve the buffering purpose, and the limiting block is arranged and guarantees the stable sliding of the sliding frame. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the whole structure schematic diagram of the utility model;
[0020] Figure 2 It is the structure schematic diagram of the A place of the utility model; Figure 1
[0021] Figure 3 It is the buffer assembly structure schematic diagram of the utility model;
[0022] Figure 4 It is the installation structure schematic diagram of the traditional bearing of the utility model.
[0023] In the drawing: 1, outside ring;2, inside ring;3, ball;4, arc part;5, buffer assembly;501, fixed frame;502, sliding frame;503, buffer plate;504, spring;505, limiting block. DETAILED DESCRIPTION
[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0025] Embodiment 1
[0026] Please refer to Figure 1 And Figure 4 The utility model provides a technical scheme:
[0027] A wind turbine variable pitch bearing assembly, comprising an outside ring 1 and an inside ring 2,
[0028] The outer ring 1 is provided with an inner ring 2, and a rolling ball 3 is connected between the outer ring 1 and the inner ring 2. The rolling ball 3 is provided with a buffer assembly 5 on both sides, and the buffer assembly 5 on both sides is fixedly connected with the outer ring 1 and the inner ring 2 respectively.
[0029] The rolling ball 3 is provided with an arc-shaped part 4 on both sides, and the arc-shaped part 4 is fixedly connected with the outer ring 1 and the inner ring 2 respectively.
[0030] One side of the arc-shaped part 4 is provided with an arc surface.
[0031] When the fan performs a variable pitch action, the variable pitch blade is connected with the fan through a variable pitch bearing, and the variable pitch bearing is driven to rotate to drive the variable pitch blade to rotate, thereby adjusting the angle of the variable pitch blade. In actual use, the variable pitch blade will vibrate slightly, which will drive the outer ring of the bearing to vibrate back and forth, thereby causing the upper and lower sides of the rolling ball cavity of the inner and outer rings to contact and collide with the rolling ball Figure 4 , which will accelerate the damage of the bearing over a long period of time, seriously affecting the quality of the bearing. The left and right distributed rolling ball cavities inside the outer ring 1 and the inner ring 2 are changed to upper and lower distributed rolling ball cavities. At this time, when the variable pitch blade vibrates to drive the outer ring 1 and the inner ring 2 to vibrate back and forth, the force between the outer ring 1 and the inner ring 2 and the rolling ball 3 can be effectively reduced, thereby effectively ensuring the normal service life of the bearing. In addition, the arc-shaped part 4 is arranged at the collision position of the outer ring 1 and the inner ring 2 and the rolling ball 3, which can effectively reduce the force of direct collision and play a certain buffering effect.
[0032] Embodiment 2
[0033] This embodiment is an improvement on embodiment 1. Please refer to Figure 2 and Figure 3 . Specifically, the buffer assembly 5 includes a fixed frame 501 and a sliding frame 502. One side of the fixed frame 501 is fixedly connected with the outer ring 1, and the other side of the fixed frame 501 is fixedly connected with the inner ring 2. The sliding frame 502 is slidingly connected inside the fixed frame 501, and the other side of the sliding frame 502 is fixedly connected with a buffer plate 503.
[0034] The inside of the sliding frame 502 is fixedly connected with a spring 504, and the other end of the spring 504 is fixedly connected with the fixed frame 501.
[0035] The upper and lower sides of the sliding frame 502 are provided with sliding grooves, and the sliding frame 502 is slidingly connected with a limiting block 505 through the sliding grooves. The outer side of the limiting block 505 is fixedly connected with the fixed frame 501.
[0036] And inside the outer ring 1 and the inner ring 2, there are also fixed frame 501, sliding frame 202 and buffer plate 203, when the arc-shaped part 4 of the outer ring 1 and the inner ring 2 moves, it will contact with the buffer plate 503 on one side of the sliding frame 502 inside the fixed frame 501, and the spring 504 arranged can play the purpose of buffering, and the limiting block 505 arranged ensures the stable sliding of the sliding frame 502, at the same time avoids the separation of the sliding frame 502 and the fixed frame 501.
[0037] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A wind turbine variable pitch bearing assembly, characterized in that: it comprises an outer ring (1) and an inner ring (2), one side of the outer ring (1) is provided with the inner ring (2), and rolling connection is provided between the outer ring (1) and the inner ring (2); both sides of the rolling ball (3) are provided with a buffer assembly (5), and the buffer assemblies (5) on both sides are respectively fixedly connected with the outer ring (1) and the inner ring (2); both sides of the rolling ball (3) are provided with an arc-shaped part (4), and the outer sides of the arc-shaped parts (4) are respectively fixedly connected with the outer ring (1) and the inner ring (2).
2. A wind turbine variable pitch bearing assembly according to claim 1, characterised in that: One side of the arc-shaped part (4) is provided with an arc surface.
3. A wind turbine variable pitch bearing assembly according to claim 1, characterized in that: The buffer assembly (5) comprises a fixed frame (501) and a sliding frame (502), one side of the fixed frame (501) is fixedly connected with the outer ring (1), the other side of the fixed frame (501) is fixedly connected with the inner ring (2), the sliding frame (502) is slidably connected inside the fixed frame (501), and the other side of the sliding frame (502) is fixedly connected with a buffer plate (503).
4. A wind turbine variable pitch bearing assembly according to claim 3, characterised in that: The inner side of the sliding frame (502) is fixedly connected with a spring (504), and the other end of the spring (504) is fixedly connected with the fixed frame (501).
5. A wind turbine variable pitch bearing assembly according to claim 3, wherein: Both sides of the sliding frame (502) are provided with a sliding groove, the sliding frame (502) is slidably connected with a limiting block (505) through the sliding groove, and the outer side of the limiting block (505) is fixedly connected with the fixed frame (501).