Noise reduction type sliding bearing for wind turbine generator

Abstract

The utility model relates to the technical field of bearings, in particular to a noise reduction type sliding bearing for a wind turbine generator, which comprises a first bearing seat and a second bearing seat, connecting supports are arranged on the inner side of the first bearing seat and the inner side of the second bearing seat, and an upper bearing bush and a lower bearing bush are fixedly connected to the inner surfaces of the two connecting supports respectively. The arc-shaped cavities in the first bearing seat and the second bearing seat are matched with the communicating mechanism composed of the first communicating pipe and the second communicating pipe, the first oil cavity is communicated with the second oil cavity, the first oil cavity is communicated with the second oil cavity through the communicating mechanism composed of the first communicating pipe and the second communicating pipe, and the oil cavity is communicated with the second oil cavity through the connecting support. The first oil cavity and the second oil cavity are prevented from being provided with openings and directly butted and communicated through the openings to cause oil leakage at the joint, and the situation that the service life of the bearing is affected by aggravation of friction due to direct contact friction of the metal surface caused by rapid loss of lubricating oil can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, concretely is a kind of noise reduction type sliding bearing for wind turbine. BACKGROUND

[0002] Sliding bearing bears key support and power transmission function in wind turbine, and is one of indispensable components in wind turbine.

[0003] In prior art, such as the noise reduction type sliding bearing applied to wind power equipment in patent application number "CN202010460903.3", wherein it is recorded that "oil cavity is arranged between upper connecting shell and upper bearing bush, and between lower bearing bush and lower connecting shell", and lubricating oil in the upper and lower oil cavities is used for bearing lubrication.

[0004] However, in the above patent application, the upper and lower oil cavities need to be directly connected together, and the two oil cavities have openings on the side close to each other, when the bearing seat and bearing seat cover are fixed together, the two oil cavities are directly connected through the openings, which may cause rapid loss of lubricating oil affecting the lubrication performance of the bearing, and the lost lubricating oil may also absorb dust to invade the generator winding to form a conductive path, causing short circuit risk. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a noise reduction type sliding bearing for wind turbine to solve the problems in the above background technology.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A noise reduction type sliding bearing for wind turbine, comprising a first bearing seat and a second bearing seat, the inner side of the first bearing seat and the second bearing seat is provided with a connecting bracket, the inner surface of the two connecting brackets is respectively fixedly connected with an upper bearing bush and a lower bearing bush; the inside of the connecting bracket is fixedly connected with a partition plate, the inner side of the connecting bracket and between the partition plate and the upper bearing bush form a first oil cavity, and the inner side of the connecting bracket and between the partition plate and the lower bearing bush form a second oil cavity;

[0008] The inside of the first bearing seat and the second bearing seat is provided with an arc-shaped cavity, a communication mechanism is arranged between the first bearing seat and the second bearing seat, the communication mechanism is used for communicating the two arc-shaped cavities, the inner wall of the two arc-shaped cavities is fixedly connected with an input oil pipe, and the two input oil pipes respectively extend to the inside of the first oil cavity and the second oil cavity.

[0009] Preferably, the inner surface of the first bearing seat and the second bearing seat is respectively fixedly connected with an upper connecting shell and a lower connecting shell, and the upper connecting shell and the lower connecting shell are fixedly connected with the connecting bracket.

[0010] Preferably, the top of the first bearing seat is provided with an oil injection pipe, which is connected with an oil input pipe inside the first bearing seat.

[0011] Preferably, the inside of the connecting support is fixedly connected with sound-absorbing sponge, and the inside of the connecting support and above and below the sound-absorbing sponge are fixedly connected with closed-cell foam aluminum.

[0012] Preferably, the inside of the connecting support and above the closed-cell foam aluminum is provided with a sound-absorbing layer filled with polyurethane foaming material, and the sound-absorbing layer is formed with honeycomb cavities through foaming process.

[0013] Preferably, the communication mechanism comprises a gap provided at the connecting position of the first bearing seat and the second bearing seat, the gap is provided with a first communication pipe and a second communication pipe, the top of the second communication pipe is fixedly connected with a connecting port, the bottom of the inner wall of the connecting port is fixedly connected with a sealing ring, the sealing ring is attached to the bottom of the first communication pipe, and the connecting position of the first communication pipe and the second communication pipe is wound with a raw material belt.

[0014] The utility model discloses beneficial effects:

[0015] In the utility model, the first oil cavity and the second oil cavity in the first bearing seat and the second bearing seat are not directly communicated, but the first oil cavity and the second oil cavity are communicated through the communication mechanism composed of the first communication pipe and the second communication pipe by the cooperation of the arc-shaped cavities on the first bearing seat and the second bearing seat, the opening of the first oil cavity and the second oil cavity is avoided, and the direct butt joint communication through the opening is avoided to cause the leakage of the connecting position, not only can prevent the rapid loss of lubricating oil to cause the direct contact friction of the metal surface, aggravate the friction and affect the service life of the bearing, but also can prevent the lubricating oil dirt from absorbing the dust to invade the generator winding to form the conductive path and cause the short circuit risk. ACCURATE DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings;

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the whole structure schematic diagram of the utility model; Figure 1 It is the sectional view of the first bearing seat and the second bearing seat in the utility model;

[0019] Figure 3 It is the enlarged view of A in the utility model; Figure 2

[0020] ​Figure 4 is the utility model Figure 1 is the utility model

[0021] The reference signs in the drawings are as follows:

[0022] 1, first bearing seat; 101, oil filling pipe; 2, second bearing seat; 5, upper connecting shell; 6, lower connecting shell; 7, connecting support; 8, upper bearing bush; 9, lower bearing bush; 10, partition plate; 11, first oil cavity; 12, second oil cavity; 13, arc cavity; 14, input oil pipe; 15, sound-absorbing sponge; 16, closed-cell foam aluminum; 17, sound-absorbing layer; 18, first communication pipe; 19, second communication pipe; 20, connecting port; 21, sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than 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 protection scope of the utility model.

[0024] As Figure 1 and Figure 4 , a noise reduction type sliding bearing for a wind turbine generator, comprising a first bearing seat 1 and a second bearing seat 2, the first bearing seat 1 and the second bearing seat 2 are symmetrical up and down and are fixed together through a bolt structure, the second bearing seat 2 is fixed on a wind power equipment, the inner surfaces of the first bearing seat 1 and the second bearing seat 2 are all arc surfaces, the inner sides of the first bearing seat 1 and the second bearing seat 2 are both provided with a connecting support 7, the inner surfaces of the two connecting supports 7 are respectively fixedly connected with an upper bearing bush 8 and a lower bearing bush 9; the upper bearing bush 8 and the lower bearing bush 9 are both made of PEEK (polyether ether ketone) and have the advantages of high temperature resistance and strong self-lubricating property,

[0025] The connecting support 7 is fixedly connected with a partition plate 10 inside, a first oil cavity 11 is formed between the partition plate 10 and the upper bearing bush 8 inside the connecting support 7, a second oil cavity 12 is formed between the partition plate 10 and the lower bearing bush 9 inside the connecting support 7, the first oil cavity 11 and the second oil cavity 12 are both closed and not directly communicated, the upper bearing bush 8 and the lower bearing bush 9 have oil holes, when the rotating shaft of the wind turbine generator passes between the upper bearing bush 8 and the lower bearing bush 9, the lubricating oil inside the first oil cavity 11 and the second oil cavity 12 can enter the rotating shaft to lubricate;

[0026] As Figure 1 , Figure 2 and Figure 4The inner part of the first bearing seat 1 and the second bearing seat 2 is provided with an arc-shaped cavity 13, a communication mechanism is arranged between the first bearing seat 1 and the second bearing seat 2, the communication mechanism is used for communicating the two arc-shaped cavities 13, the inner wall of the two arc-shaped cavities 13 is fixedly connected with an input oil pipe 14, and the two input oil pipes 14 extend into the first oil cavity 11 and the second oil cavity 12 respectively, so that the arc-shaped cavities 13 of the first bearing seat 1 and the second bearing seat 2 and the corresponding first oil cavity 11 and the second oil cavity 12 can be communicated.

[0027] As Figure 1 and Figure 4 The inner surface of the first bearing seat 1 and the second bearing seat 2 is fixedly connected with an upper connecting shell 5 and a lower connecting shell 6 respectively, the upper connecting shell 5 and the lower connecting shell 6 are fixedly connected with the connecting support 7, and the fixed mode between the upper connecting shell 5, the lower connecting shell 6 and the connecting support 7 includes riveting, bolt fixing and welding fixing.

[0028] As Figure 1 and Figure 4 The top of the first bearing seat 1 is provided with an oil injection pipe 101, the oil injection pipe 101 is communicated with the input oil pipe 14 in the first bearing seat 1, and an external oil injection mechanism is communicated with the oil injection pipe 101, so that the lubricating oil can be injected into the input oil pipe 14 in the first bearing seat 1 through the oil injection pipe 101.

[0029] As Figure 1 and Figure 4 The inner part of the connecting support 7 is fixedly connected with a sound-absorbing sponge 15, and the inner part of the connecting support 7 and above and below the sound-absorbing sponge 15 are fixedly connected with closed-cell foam aluminum 16, the sound-absorbing sponge 15 and the closed-cell foam aluminum 16 can be used for silencing and noise reduction of the bearing, and the closed-cell foam aluminum 16 has pressure resistance and shock resistance while silencing.

[0030] As Figure 1 and Figure 4 The inner part of the connecting support 7 and above the closed-cell foam aluminum 16 is provided with a sound-absorbing layer 17 filled with polyurethane foaming material, the sound-absorbing layer 17 is formed into a honeycomb cavity through a foaming process, and sound waves are absorbed and consumed due to the pore friction and reflection in the honeycomb cavity after entering, so that the middle and high frequency noise is significantly reduced.

[0031] As Figure 2 and Figure 3The connecting mechanism comprises a gap provided at the connecting position of the first bearing seat 1 and the second bearing seat 2, a first connecting pipe 18 and a second connecting pipe 19 are arranged in the gap, the first connecting pipe 18 is fixed on the first bearing seat 1 and communicates with the arc-shaped cavity 13 thereon, the second connecting pipe 19 is fixed on the second bearing seat 2 and communicates with the arc-shaped cavity 13 thereon, the top of the second connecting pipe 19 is fixedly connected with a connecting port 20, the bottom of the inner wall of the connecting port 20 is fixedly connected with a sealing ring 21, the sealing ring 21 is attached to the bottom of the first connecting pipe 18, the sealing between the first connecting pipe 18 and the second connecting pipe 19 is realized, meanwhile, the gap can be operated, and the raw material belt is wound at the connecting position of the first connecting pipe 18 and the second connecting pipe 19, so that the sealing between the first connecting pipe 18 and the second connecting pipe 19 is further improved.

[0032] The working principle of the noise reduction type sliding bearing for the wind turbine generator provided by the utility model is as follows:

[0033] The rotating shaft of the wind turbine generator can pass between the upper bearing bush 8 and the lower bearing bush 9, the upper bearing bush 8 and the lower bearing bush 9 have self-lubricating performance, and lubricating oil can be injected through the oil injection pipe 101, the lubricating oil is injected into the input oil pipe 14 in the first bearing seat 1, then enters the first oil cavity 11 and the arc-shaped cavity 13 inside the first bearing seat 1 respectively, then enters the arc-shaped cavity 13 inside the second bearing seat 2 through the first connecting pipe 18 and the second connecting pipe 19, and finally enters the second oil cavity 12 through the input oil pipe 14 inside the second bearing seat 2, the lubricating oil in the first oil cavity 11 and the second oil cavity 12 can lubricate the rotating shaft of the wind turbine generator through the oil holes in the upper bearing bush 8 and the lower bearing bush 9.

[0034] Compared with the related art, the noise reduction type sliding bearing for the wind turbine generator has the following beneficial effects:

[0035] In the utility model, the first oil cavity 11 and the second oil cavity 12 inside the first bearing seat 1 and the second bearing seat 2 are not directly connected, but are connected through the connecting mechanism composed of the first connecting pipe 18 and the second connecting pipe 19 and the arc-shaped cavities 13 on the first bearing seat 1 and the second bearing seat 2, so that the first oil cavity 11 and the second oil cavity 12 are connected, the opening of the first oil cavity 11 and the second oil cavity 12 is avoided, and the oil leakage at the connecting position caused by the direct butt joint connection through the opening is avoided, not only the rapid loss of lubricating oil can be prevented to cause the direct contact friction of the metal surface and aggravate the friction and affect the service life of the bearing, but also the lubricating oil pollution can be prevented from absorbing dust to invade the generator winding to form a conductive path and cause the short circuit risk.

[0036] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A noise-reducing plain bearing for a wind turbine generator, comprising a first bearing seat (1) and a second bearing seat (2), characterized in that The inner side of the first bearing seat (1) and the second bearing seat (2) is provided with a connecting bracket (7), the inner surface of the two connecting brackets (7) is fixedly connected with an upper bearing bush (8) and a lower bearing bush (9) respectively; the inner part of the connecting bracket (7) is fixedly connected with a partition plate (10), the inner side of the connecting bracket (7) and between the partition plate (10) and the upper bearing bush (8) forms a first oil cavity (11), the inner side of the connecting bracket (7) and between the partition plate (10) and the lower bearing bush (9) forms a second oil cavity (12); The inner part of the first bearing seat (1) and the second bearing seat (2) is provided with an arc-shaped cavity (13), a communication mechanism is arranged between the first bearing seat (1) and the second bearing seat (2), the communication mechanism is used for communicating the two arc-shaped cavities (13), the inner wall of the two arc-shaped cavities (13) is fixedly connected with an input oil pipe (14), and the two input oil pipes (14) extend into the first oil cavity (11) and the second oil cavity (12) respectively.

2. A noise reducing plain bearing for a wind turbine generator according to claim 1, characterized in that The inner surface of the first bearing seat (1) and the second bearing seat (2) is fixedly connected with an upper connecting shell (5) and a lower connecting shell (6) respectively, and the upper connecting shell (5) and the lower connecting shell (6) are fixedly connected with the connecting bracket (7).

3. A noise reducing plain bearing for a wind turbine generator according to claim 1, characterized in that The top of the first bearing seat (1) is provided with an oil injection pipe (101), and the oil injection pipe (101) is in communication with the input oil pipe (14) in the first bearing seat (1).

4. A noise reducing plain bearing for a wind turbine generator according to claim 1, characterized in that The inner part of the connecting bracket (7) is fixedly connected with a sound-absorbing sponge (15), and the connecting bracket (7) is fixedly connected with a closed-cell aluminum foam (16) above and below the sound-absorbing sponge (15).

5. A noise reducing plain bearing for a wind turbine generator according to claim 4, characterized in that The inner part of the connecting bracket (7) and above the closed-cell aluminum foam (16) is provided with a sound-absorbing layer (17) filled with polyurethane foaming material, and the sound-absorbing layer (17) forms a honeycomb cavity through a foaming process.

6. A noise reducing plain bearing for a wind turbine generator according to claim 1, characterized in that The communication mechanism comprises a notch arranged at the connecting part of the first bearing seat (1) and the second bearing seat (2), the notch is provided with a first communication pipe (18) and a second communication pipe (19), the top of the second communication pipe (19) is fixedly connected with a connecting port (20), the bottom of the inner wall of the connecting port (20) is fixedly connected with a sealing ring (21), the sealing ring (21) is attached to the bottom of the first communication pipe (18), and the connecting part of the first communication pipe (18) and the second communication pipe (19) is wound with a raw tape.

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