CN113175421A

CN113175421A - Pitch bearing self-lubricating device for wind turbine generator system

Info

Publication number: CN113175421A
Application number: CN202110477961.1A
Authority: CN
Inventors: 沈忠协; 孙峰; 唐广林; 周炳伟; 张伟; 顾明浩
Original assignee: Jiangyin Hengrun Transmission Technology Co ltd
Current assignee: Jiangyin Hengrun Transmission Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-27
Anticipated expiration: 2041-04-30
Also published as: CN113175421B

Abstract

The invention relates to the technical field of variable pitch bearings, in particular to a self-lubricating device of a variable pitch bearing for a wind turbine generator. It includes becomes oar bearing body and installs become the inside lubricating oil output mechanism of oar bearing body, it includes the outer loop to become oar bearing body, the outer loop inboard is provided with the internal connection groove, the outer loop inboard is provided with the inner ring, a plurality of oil outlet have been seted up to the inner ring side, lubricating oil output mechanism includes the go-between, the go-between side is provided with a plurality of oily devices of flourishing, flourishing oily device includes the oil tank, the oil tank side is provided with a plurality of defeated oil pipes, defeated oil pipe with the oil outlet intercommunication. According to the invention, through the arranged lubricating oil output mechanism, when the variable pitch bearing operates, lubricating oil in the oil tank flows into the oil outlet hole under the action of centrifugal force, so that the lubricating oil is sprayed on the surface of the clamping tooth, the self-lubricating function of the variable pitch bearing is completed, and the abnormal rotation of the variable pitch bearing is prevented from influencing the normal use of the wind turbine generator.

Description

Pitch bearing self-lubricating device for wind turbine generator system

Technical Field

The invention relates to the technical field of variable pitch bearings, in particular to a self-lubricating device of a variable pitch bearing for a wind turbine generator.

Background

The variable pitch bearing is one of core parts of a control system of a large wind turbine generator and plays an important role in safe, stable and efficient operation of the generator. The stable variable pitch control becomes one of the hot spots and difficulties in the current research of the control technology of the large-scale wind generating set, and the variable pitch bearing controls the position angle of the blade relative to the rotating plane. The variable pitch control enables the fan to obtain electric energy at low wind speed and capture wind energy with fixed size when the wind speed is higher than rated wind speed.

As is well known, in the process of rotating a bearing, because the rotating speed is high and the bearing has high friction force, lubricating oil needs to be coated to reduce the friction force and maintain the normal operation of the bearing, most of the existing variable-pitch bearings need to be continuously added with the lubricating oil from the outside, the variable-pitch bearings need to be disassembled after running for a period of time, and then the lubricating oil is coated, so that the operation is very complicated and the workload is high.

Disclosure of Invention

The invention aims to provide a variable-pitch bearing self-lubricating device for a wind turbine generator, which aims to solve the problem that lubricating oil needs to be continuously added from the outside in the background technology.

In order to realize the above-mentioned purpose, provide a wind turbine generator system with becoming oar bearing self-lubricating arrangement, including becoming oar bearing body and installing become the inboard lubricating oil output mechanism of oar bearing body, it includes at least to become oar bearing body:

the inner side of the outer ring is provided with an internal connecting groove, and the cross-sectional dimension of the internal connecting groove is 1/2 of that of the outer ring;

the inner ring is arranged on the inner side of the outer ring, a plurality of clamping teeth are arranged on the inner side of the inner ring, a plurality of oil outlets are formed in the side surface of the inner ring, and the oil outlets are uniformly arranged;

the lubricating oil delivery mechanism includes at least:

the cross section size of the inner side of the connecting ring is consistent with the cross section size of the outer side of the inner ring, the connecting ring is installed on the outer side of the inner ring in a fitting mode, a plurality of connecting holes are formed in the side face of the connecting ring, the cross section size of each connecting hole is consistent with the cross section size of the oil outlet hole, the center of a circle of each connecting hole is kept to be horizontal and consistent, an oil containing groove is formed in the connecting ring, and the cross section size of the oil containing groove is 1/2 of the cross section size of the connecting ring;

the oil containing device is provided with a plurality of oil containing devices, each oil containing device comprises an oil tank, an oil conveying pipe is arranged on one side of each oil tank, and the oil conveying pipes are communicated with the outer sides of the connecting holes.

As a further improvement of the technical scheme, a pair of clamping rings is arranged on the inner side of the outer ring, and the clamping rings are positioned at the upper end and the lower end of the connecting ring to limit the position of the connecting ring.

As a further improvement of the technical scheme, a plurality of partition plates are arranged at the inner ends of the connecting holes, the cross-sectional sizes of the partition plates are consistent with that of the oil containing groove, and the partition plates divide the interior of the oil containing groove into a plurality of areas in a halving mode.

As a further improvement of the technical scheme, the two ends of the inner side of the oil outlet are both provided with a filter plate, and the filter plates are of a net structure.

As a further improvement of the technical scheme, a plurality of balls are arranged on the inner side of the oil outlet, the cross section of each ball is 3/4 of the cross section of the inner part of the oil outlet, and the balls are in rolling connection with the oil outlet.

As a further improvement of the technical scheme, a clamping ring is arranged on the other side of the oil tank, the clamping ring is communicated with the inside of the oil tank, an external groove is formed in the outer side of the outer ring, a plurality of oil conveying holes are formed in the external groove, the oil conveying holes are communicated with the clamping ring, a sealing piece is arranged in the clamping ring, a plurality of side blocks are arranged on the side surface of the sealing piece, and the sealing piece is matched with the clamping ring in an inserting manner.

As a further improvement of the technical solution, an external thread is arranged on the outer side of the sealing element, an internal thread is arranged on the inner side of the clamping ring, and the sealing element is in threaded connection with the clamping ring.

As a further improvement of the technical scheme, the sealing piece is composed of a plurality of fan-shaped plates, the fan-shaped plates are densely connected without gaps, and the cambered surface position of the sealing piece is fixedly connected with the inner side of the clamping ring.

As a further improvement of the technical scheme, a side sealing device is arranged in the external groove and comprises a plurality of side rings, a cavity is arranged on the inner side of each side ring, an arc plate is connected between the side rings, the arc plate is connected with the side rings in a sliding manner, the side rings are connected with the arc plates to form a circular ring, a connector is arranged on one side of each side ring, a slot is formed in the side surface of the connector, a plug is arranged on one side of each arc plate, and the plug is inserted into the slot and matched with the slot.

As a further improvement of the technical scheme, one end of the side surface of the arc plate is provided with an embedded groove which is of an arc structure.

Compared with the prior art, the invention has the beneficial effects that:

1. in this wind turbine generator system is with becoming oar bearing self-lubricating device, the lubricating oil output mechanism that sets up, when becoming the oar bearing function, the inside lubricating oil of oil tank flows into the oil outlet hole through centrifugal force effect this moment, makes it spray on the latch surface, accomplishes and becomes oar bearing self-lubricating function, prevents to become oar bearing rotation abnormity, influences wind turbine generator system normal use.

2. This wind turbine generator system is with becoming among the oar bearing self-lubricating device, through the grip ring that sets up, carry out the rigidity with both ends about its go-between, make its become oar bearing operation in-process, translocation appears in the go-between, lead to the unable oil outlet of aiming at of connecting hole, thereby lead to the lubricating oil inflow internal connection groove that flows out in the oil tank, cause the wasting of resources, internal connection inslot inner space is limited simultaneously, flow in excessive lubricating oil can lead to lubricating oil to spill over from the outer loop top, very easily lead to external equipment to receive the harm.

3. This wind turbine generator system is with becoming among the oar bearing self-lubricating device, through the ball that sets up, when lubricating oil flowed into the oil outlet downthehole, the ball can roll along with lubricating oil flow through gradually this moment, grinds its silt piece that forms in the oil outlet inside, makes its silt piece volume diminish, causes the silt stifled when preventing to flow into the latch surface.

4. In this wind turbine generator system is with becoming oar bearing self-lubricating device, through side ring and the arc board that sets up, make its external groove outside can realize covering, when need carry out lubricating oil and supply simultaneously, only need slide the arc board, make its arc board slide in the annular intracavity of side ring, make its oil delivery hole expose outside to lubricating oil can supply.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a pitch bearing body of the present invention;

FIG. 3 is a schematic diagram of an outer ring structure of the present invention;

FIG. 4 is a cross-sectional view of the inner ring of the present invention;

FIG. 5 is a cross-sectional view of the lubricant delivery mechanism of the present invention;

FIG. 6 is a schematic view of an oil container according to the present invention;

FIG. 7 is a second schematic structural view of the oil container according to the present invention;

FIG. 8 is a third schematic view of the structure of the oil container of the present invention;

FIG. 9 is an exploded view of the side seal arrangement of the present invention;

fig. 10 is an enlarged view of the structure at a in fig. 9 according to the present invention.

The various reference numbers in the figures mean:

10. a pitch bearing body;

110. an outer ring; 111. an interconnecting slot; 112. an external connection groove; 113. an oil transfer hole; 114. a clamp ring;

120. an inner ring; 121. clamping teeth; 122. an oil outlet hole; 123. a filter plate; 124. a ball bearing;

20. a lubricating oil output mechanism;

210. a connecting ring; 211. connecting holes; 212. an oil containing groove; 213. a partition plate;

220. an oil containing device; 221. an oil tank; 222. an oil delivery pipe; 223. a snap ring; 224. a closure;

30. a side sealing device;

310. a side ring; 311. a connector; 312. a slot;

320. an arc plate; 321. a plug; 322. and a groove is embedded.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

In the description of the present invention, 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, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example 1

Referring to fig. 1 to 6 and fig. 9 to 10, an object of the present embodiment is to provide a self-lubricating device for a pitch bearing of a wind turbine generator, including a pitch bearing body 10 and a lubricating oil output mechanism 20 installed inside the pitch bearing body 10, where the pitch bearing body 10 at least includes:

the inner side of the outer ring 110 is provided with an inner connecting groove 111, and the cross section of the inner connecting groove 111 is 1/2 which is equal to the cross section of the outer ring 110;

the oil outlet structure comprises an inner ring 120, wherein the inner ring 120 is arranged on the inner side of an outer ring 110, a plurality of clamping teeth 121 are arranged on the inner side of the inner ring 120, a plurality of oil outlet holes 122 are formed in the side surface of the inner ring 120, and the oil outlet holes 122 are uniformly arranged;

the lubricant delivery mechanism 20 includes at least:

the cross section size of the inner side of the connecting ring 210 is consistent with the cross section size of the outer side of the inner ring 120, the connecting ring 210 is installed on the outer side of the inner ring 120 in a fitting mode, the side face of the connecting ring 210 is provided with a plurality of connecting holes 211, the cross section size of each connecting hole 211 is consistent with the cross section size of the oil outlet 122, the circle centers of the connecting holes 211 and the oil outlet 122 are kept to be consistent horizontally, an oil containing groove 212 is arranged inside the connecting ring 210, and the cross section size of the oil containing groove 212 is 1/2 of the cross section size of the connecting ring 210;

the oil containing device 220 is provided with a plurality of oil containing devices 220, each oil containing device 220 comprises an oil tank 221, one side of each oil tank 221 is provided with an oil conveying pipe 222, and the oil conveying pipes 222 are communicated with the outer sides of the connecting holes 211.

When the variable-pitch bearing is used specifically, when the variable-pitch bearing operates, the outer ring 110 and the inner ring 120 start to rotate at the moment, due to the action of centrifugal force, lubricating oil contained in the oil tank 221 flows into the connecting hole 211 through the oil conveying pipe 222 to reach the inside of the oil containing groove 212, and then the lubricating oil flows into the oil outlet 122 through the connecting hole 211 on the other side, so that the surface of the latch 121 is sprayed, the self-lubricating function of the variable-pitch bearing is completed, and when the latch 121 and the connecting device rotate, the high-speed stable rotation can be kept between the latch 121 and the connecting device, so that the abnormal rotation of the variable-pitch bearing is prevented, and the normal use of a wind turbine generator is influenced.

In addition, a pair of clamping rings 114 are arranged inside the outer ring 110, and the clamping rings 114 are positioned at the upper and lower ends of the connecting ring 210 to limit the position of the connecting ring 210. When the variable-pitch bearing is used specifically, the upper end and the lower end of the connecting ring 210 are fixed through the arranged clamping ring 114, so that the connecting ring 210 is dislocated in the operation process of the variable-pitch bearing, the connecting hole 211 cannot be aligned to the oil outlet hole 122, lubricating oil flowing out of the oil tank 221 flows into the internal connecting groove 111, resource waste is caused, meanwhile, the internal space of the internal connecting groove 111 is limited, the lubricating oil can overflow from the top end of the outer ring 110 due to excessive lubricating oil flowing in, and external equipment is easily damaged.

Furthermore, a plurality of partition plates 213 are arranged at the inner end of the connecting hole 211, the cross-sectional dimension of each partition plate 213 is consistent with that of the oil containing groove 212, and each partition plate 213 divides the interior of the oil containing groove 212 into a plurality of areas in a halving manner. When specifically using, through the baffle 213 that sets up, equally divide the processing with its flourishing oil groove 212 inside, make the inside lubricating oil that flows in of its each oil tank 221 can the assigned region to evenly distributed when can guaranteeing lubricating oil inflow latch 121 guarantees that each position homoenergetic of latch 121 sprays the lubrication, avoids rotating the in-process, and certain region fails to spray lubricating oil for a long time, easily leads to the latch 121 to appear the friction damage.

Still further, the inboard both ends of oil outlet 122 all are provided with the filter 123, and the filter 123 is network structure. Through the filter 123 that sets up, when the lubricating oil stream goes through oil outlet 122, because lubricating oil flows for a long time, lead to forming a large amount of silt pieces in the lubricating oil, if directly scribble the foam at its latch 121, long-term accumulation can lead to latch 121 gap department to save the silt piece, latch 121 and the unable meshing of its connecting gear when very easily leading to rotating, the gear appears and drops, pass through the filter 123 this moment, carry out filtration treatment to its silt piece, thereby can reduce its silt piece quantity that flows into latch 121, guarantee its latch 121 normal operating.

Specifically, a plurality of balls 124 are arranged on the inner side of the oil outlet 122, the cross section of each ball 124 is 3/4 of the cross section of the inner portion of the oil outlet 122, and the balls 124 are in rolling connection with the oil outlet 122. Through the ball 124 that sets up, when lubricating oil flowed into in the oil outlet 122, ball 124 can roll along with lubricating oil flow through gradually this moment, grinds its silt piece that forms in oil outlet 122 inside, makes its silt piece volume diminish, prevents to cause the silt when flowing into latch 121 surface.

In addition, a clamping ring 223 is arranged on the other side of the oil tank 221, the clamping ring 223 is communicated with the inside of the oil tank 221, an external groove 112 is arranged on the outer side of the outer ring 110, a plurality of oil conveying holes 113 are formed in the external groove 112, the oil conveying holes 113 are communicated with the clamping ring 223, a sealing element 224 is arranged in the clamping ring 223, a plurality of side blocks are arranged on the side face of the sealing element 224, and the sealing element 224 is matched with the clamping ring 223 in an inserting mode. The limit piece is preferred to adopt rubber materials, when specifically using, can realize through snap ring 223 that the lubricating oil in the oil tank 221 fills, guarantees that its lubricating oil is sufficient, and the closure 224 that sets up simultaneously can guarantee that the oil tank 221 realizes the free switch, conveniently carries out the packing of lubricating oil, guarantees the inside leakproofness of oil tank 221 at the rotation in-process, prevents the reverse outflow oil tank 221 outer end of lubricating oil.

Further, be provided with side sealing device 30 in external groove 112, side sealing device 30 includes a plurality of side rings 310, side ring 310 inboard is provided with the cavity, be connected with arc board 320 between the ring 310 of both sides, arc board 320 and side ring 310 sliding connection, side ring 310 is connected with arc board 320 and is constituted the ring, side ring 310 one side is provided with connector 311, connector 311 side is provided with slot 312, arc board 320 one side is provided with plug 321, plug 321 is joined in marriage with slot 312 grafting. The outer side of the external groove 112 can be covered by the side ring 310 and the arc plate 320, and when lubricating oil needs to be supplemented, the arc plate 320 only needs to be slid, so that the arc plate 320 slides into the cavity of the side ring 310, the oil conveying hole 113 is exposed, and lubricating oil can be supplemented.

Still further, an embedded groove 322 is formed at one end of the side surface of the arc plate 320, and the embedded groove 322 is of an arc structure. When specifically using, through the embedded groove 322 that sets up, the staff of being convenient for slides.

Example 2

Referring to fig. 7, in order to further enhance the sealing performance of the oil tank 221 and facilitate the detachment by a worker, an external thread is provided on the outer side of the sealing element 224, an internal thread is provided on the inner side of the snap ring 223, and the sealing element 224 is screwed with the snap ring 223. During specific use, the sealing piece 224 is arranged, so that the internal sealing performance of the oil tank 221 is improved, and the sealing piece 224 is convenient for workers to take out from the clamping ring 223 through threaded connection, so that the situation that the oil tank 221 cannot be pulled out due to the fact that the sealing piece 224 is embedded too tightly is avoided, and the oil tank 221 needs to be replaced.

Example 3

Referring to fig. 8, in order to automate the sealing member 224 and reduce the workload, the sealing member 224 is composed of a plurality of sector plates, the sector plates are densely connected without gaps, and the arc position of the sealing member 224 is fixedly connected with the inner side of the snap ring 223. The closing piece 224 is preferably made of rubber materials, the softness is high, the plasticity is strong, when the sealing piece is used specifically, when lubricating oil flows into the clamping ring 223, the lubricating oil flowing into the clamping ring 223 extrudes the closing piece 224 through self-generated gravity, the sector plates are inwards bent after being extruded, a cavity is formed, the lubricating oil flows into the oil tank 221 through the cavity, when the lubricating oil completely flows into the oil tank 221 in a dropping mode, the closing piece 224 loses pressure and can restore to the original state again, the internal sealing of the oil tank 221 is kept, through the arranged closing piece 224, the oil tank 221 does not need to be manually opened or closed by a worker, automatic treatment is achieved, and meanwhile the sealing performance of the oil tank can be guaranteed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a wind turbine generator system is with becoming oar bearing self-lubricating arrangement, includes to become oar bearing body (10) and install become inboard lubricating oil output mechanism (20) of oar bearing body (10), its characterized in that: the pitch bearing body (10) comprises at least:

the inner side of the outer ring (110) is provided with an inner connecting groove (111), and the cross-sectional dimension of the inner connecting groove (111) is 1/2 of that of the outer ring (110);

the oil filter comprises an inner ring (120), wherein the inner ring (120) is arranged on the inner side of the outer ring (110), a plurality of clamping teeth (121) are arranged on the inner side of the inner ring (120), a plurality of oil outlets (122) are formed in the side surface of the inner ring (120), and the oil outlets (122) are uniformly arranged;

the lubricant delivery mechanism (20) includes at least:

the cross-sectional dimension of the inner side of the connecting ring (210) is consistent with the cross-sectional dimension of the outer side of the inner ring (120), the connecting ring (210) is attached to the outer side of the inner ring (120), a plurality of connecting holes (211) are formed in the side face of the connecting ring (210), the cross-sectional dimension of each connecting hole (211) is matched with the cross-sectional dimension of the oil outlet hole (122), the circle centers of the connecting holes and the oil outlet hole are kept consistent horizontally, an oil containing groove (212) is formed in the connecting ring (210), and the cross-sectional dimension of the oil containing groove (212) is 1/2 of the cross-sectional dimension of the connecting ring (210);

contain oily device (220), it is provided with a plurality of to contain oily device (220), it includes oil tank (221) to contain oily device (220), oil tank (221) one side is provided with defeated oil pipe (222), defeated oil pipe (222) with the connecting hole (211) outside keeps the intercommunication.

2. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 1, characterized in that: the inner side of the outer ring (110) is provided with a pair of clamping rings (114), and the clamping rings (114) are positioned at the upper end and the lower end of the connecting ring (210) and limit the position of the connecting ring (210).

3. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 1, characterized in that: the inner end of the connecting hole (211) is provided with a plurality of partition plates (213), the cross-sectional dimension of each partition plate (213) is consistent with that of the oil containing groove (212), and each partition plate (213) divides the interior of the oil containing groove (212) into a plurality of areas in a halving manner.

4. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 1, characterized in that: the filter plate (123) are arranged at two ends of the inner side of the oil outlet (122), and the filter plate (123) is of a net structure.

5. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 4, wherein: a plurality of balls (124) are arranged on the inner side of the oil outlet hole (122), the cross section of each ball (124) is 3/4 of the cross section of the inner part of the oil outlet hole (122), and the balls (124) are in rolling connection with the oil outlet hole (122).

6. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 2, characterized in that: oil tank (221) opposite side is provided with snap ring (223), snap ring (223) with oil tank (221) inside keeps the intercommunication, outer loop (110) outside is provided with outer groove (112), be provided with a plurality of oil transmission holes (113) in outer groove (112), oil transmission hole (113) with snap ring (223) keep the intercommunication, be provided with closure (224) in snap ring (223), closure (224) side is provided with a plurality of limit pieces, closure (224) with snap ring (223) are pegged graft and are joined in marriage.

7. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 6, wherein: the outer side of the closing piece (224) is provided with external threads, the inner side of the clamping ring (223) is provided with internal threads, and the closing piece (224) is in threaded connection with the clamping ring (223).

8. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 6, wherein: the closing piece (224) is composed of a plurality of sector plates, the sector plates are densely connected without gaps, and the cambered surface position of the closing piece (224) is fixedly connected with the inner side of the clamping ring (223).

9. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 6, wherein: be provided with side sealing device (30) in outer groove (112), side sealing device (30) include a plurality of side rings (310), side ring (310) inboard is provided with the cavity, two be connected with arc board (320) between side ring (310), arc board (320) with side ring (310) sliding connection, side ring (310) with arc board (320) are connected and are constituted the ring, side ring (310) one side is provided with connector (311), connector (311) side is provided with slot (312), arc board (320) one side is provided with plug (321), plug (321) with slot (312) are pegged graft and are joined in marriage.

10. The pitch bearing self-lubricating device for the wind turbine generator set according to claim 9, wherein: an embedded groove (322) is formed in one end of the side face of the arc plate (320), and the embedded groove (322) is of an arc-shaped structure.