Yaw system brake assembly and wind generating set

Abstract

The utility model discloses a yaw system brake assembly and a wind generating set, and relates to the technical field of wind power generation, the yaw system brake assembly comprises a guide bushing, a pre-tightening assembly, a fixing piece, a first connecting piece and a second connecting piece, the first end of the guide bushing is provided with a positioning boss used for being installed with a rack in a positioning mode, and the pre-tightening assembly is arranged in the guide bushing; the fixing piece is arranged at the second end of the guide bush and provided with a first connecting hole and a second connecting hole, the first connecting piece penetrates through the first connecting hole and is used for pressing the pre-tightening assembly on the brake disc, the second connecting piece penetrates through the second connecting hole and is used for pressing the pre-tightening assembly on the brake disc, and the second connecting piece penetrates through the second connecting hole and is used for pressing the pre-tightening assembly on the brake disc. And the base is fixedly connected with a rack. According to the utility model, the acting force conduction path from the pre-tightening assembly to the rack is added, the conduction path does not comprise a guide bushing, and the guide bushing is only used for separating the pre-tightening assembly from the rack and is not subjected to the acting force of the pre-tightening assembly, so that the risk of fracture and failure of the guide bushing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and more specifically to a yaw system braking component and a wind power generator set. Background Art

[0002] The yaw system of a wind turbine is a key component to ensure the efficient operation of the wind turbine. It can keep the wind rotor consistent with the wind direction at all times, thereby maximizing the efficiency of wind energy absorption. The yaw system usually includes a base, a tower, a yaw drive, a yaw bearing, and a yaw brake. The function of the yaw brake is to provide braking force to prevent the nacelle from deviating from the target position due to inertia or external loads during the operation of the wind turbine when the nose is facing the incoming wind direction or other specified positions, thereby ensuring the safe and reliable operation of the wind turbine. The braking damping torque is obtained by adjusting the pre-tightening torque of the bolt to achieve precise control of the braking effect.

[0003] However, there are some problems with the prestressed bolt brake assembly of the yaw system of the wind turbine generator set in the prior art: Figure 1 , the bushing 1-3 is installed in the bushing 1-2 through the threaded plug 1-1, and the bushing 1-2 is then installed on the frame 3-1. During use, the bushing 1-2 needs to withstand the pressure exerted by the wind turbine cabin, and it is very easy to be damaged or broken. Once the bushing 1-2 is damaged or broken, due to the limitation of the structural space design, the head needs to be disassembled simultaneously when replacing the bushing 1-2, which makes disassembly and assembly difficult and time-consuming, and thus affects the normal operation of the wind turbine.

[0004] Therefore, how to reduce the impact of maintenance of the yaw system brake assembly on the normal operation of the wind turbine generator set has become a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a yaw system brake assembly to reduce the impact of maintenance of the yaw system brake assembly on the normal operation of a wind turbine.

[0006] Another object of the utility model is to provide a wind turbine generator set including the above-mentioned yaw system braking assembly.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A yaw system brake assembly, comprising:

[0009] A guide bushing, wherein a first end of the guide bushing is provided with a positioning boss for positioning and mounting with the frame;

[0010] A pre-tightening assembly is arranged inside the guiding bushing and has a friction surface exposed outside the guiding bushing, and the friction surface is used to abut against the brake disc.

[0011] A fixing member is arranged at the second end of the guiding bushing and is provided with a first connection hole and a second connection hole.

[0012] A first connecting member passes through the first connection hole and is used to press the pre-tightening assembly in the direction of the brake disc.

[0013] A second connecting member passes through the second connection hole and is used to connect with the machine frame.

[0014] Optionally, in the above-mentioned yaw system braking assembly, one end of the fixing member facing the guiding bushing is provided with an adjustment hole communicating with the first connection hole, and the pre-tightening assembly is embedded in the adjustment hole.

[0015] Optionally, in the above-mentioned yaw system braking assembly, the fixing member is provided with a positioning hole communicating with the adjustment hole. The positioning hole is arranged at one end of the adjustment hole far from the first connection hole and is for the second end of the guiding bushing to be embedded.

[0016] Optionally, in the above-mentioned yaw system braking assembly, the pre-tightening assembly includes:

[0017] A fixed-distance shaft is arranged inside the guiding bushing;

[0018] An elastic member is arranged inside the guiding bushing and sleeved on the fixed-distance shaft, and the first connecting member is used to press the elastic member in the direction of the brake disc;

[0019] A friction plate is arranged at one end of the elastic member far from the first connecting member, with one end arranged inside the guiding bushing and the other end face being the friction surface.

[0020] Optionally, in the above-mentioned yaw system braking assembly, the pre-tightening assembly further includes a first pressing plate, and the first pressing plate is arranged between the elastic member and the first connecting member and abuts against the first connecting member.

[0021] Optionally, in the above-mentioned yaw system braking assembly, the pre-tightening assembly further includes a second pressing plate, and the second pressing plate is arranged between the elastic member and the friction plate.

[0022] Optionally, in the above-mentioned yaw system braking assembly, the first connecting member and the pre-tightening assembly are respectively provided with a first oil injection hole and a second oil injection hole which are communicated, and an oil cup for covering the first oil injection hole is arranged on the first connecting member.

[0023] Optionally, in the above-mentioned yaw system braking assembly, the first connecting member is a pre-tightening bolt, and a lock nut for screwing with the fixing member is threadedly provided on the first connecting member.

[0024] Optionally, in the above-mentioned yaw system braking assembly, the second connecting holes are a plurality of circumferentially and uniformly arranged around the first connecting hole, and the second connecting members are a plurality of corresponding to the second connecting holes one by one.

[0025] A wind turbine generator set includes a frame, a brake disc and the above-mentioned yaw system braking assembly. An installation hole is provided on the frame, the guiding bush is arranged in the installation hole, and the positioning boss is in positioning fit with the step surface of the installation hole. The brake disc abuts against the friction surface.

[0026] The yaw system braking assembly provided by the present invention includes a guiding bush, a pre-tightening assembly, a fixing member, a first connecting member and a second connecting member. A positioning boss for positioning and installing with the frame is provided at the first end of the guiding bush. The pre-tightening assembly is arranged in the guiding bush and has a friction surface exposed outside the guiding bush. This friction surface is used to abut against the brake disc to achieve braking. The fixing member is arranged at the second end of the guiding bush and is provided with a first connecting hole and a second connecting hole. The first connecting member passes through the first connecting hole and abuts against the pre-tightening assembly for pressing the pre-tightening assembly against the brake disc. The second connecting member passes through the second connecting hole and is used to connect with the frame to realize the fixation of the fixing member and the frame. The acting force of the brake disc is applied to the pre-tightening assembly through the friction surface, and then transmitted to the first connecting member by the pre-tightening assembly. The first connecting member can transmit the acting force to the fixing member for dispersion. Finally, the fixing member transmits the acting force to the frame through the second connecting member.

[0027] Compared with the prior art, the yaw system braking assembly provided by the present invention increases the acting force conduction path from the pre-tightening assembly to the frame, and this conduction path does not include the guiding bush. The guiding bush only serves as an installation part to separate the pre-tightening assembly and the frame, and does not receive the axial acting force of the pre-tightening assembly, reducing the risk of fracture and failure of the guiding bush. When the yaw system braking assembly is subjected to excessive force, the fixing member, the first connecting member and the second connecting member will deform or fail prior to the guiding bush. At the same time, when the fixing member, the first connecting member or the second connecting member needs to be repaired and replaced, the disassembly and assembly operations can be directly carried out from the side of the frame facing away from the brake disc and with a large operating space, rather than from the side of the frame facing the brake disc with many components and difficult disassembly and assembly operations. The maintenance is simpler, reducing the impact on the normal operation of the wind turbine generator set, thereby effectively increasing the power generation of the wind farm and improving the economic benefits of the wind farm.

[0028] The wind turbine provided by the present utility model comprises a frame, a brake disc and the above-mentioned yaw system braking assembly. An installation hole is formed in the frame, and the installation hole is a stepped hole. A guiding bush is arranged in the installation hole, and the positioning boss of the guiding bush is positioned and fitted with the stepped surface of the installation hole. The brake disc abuts against the friction surface. Due to the above-mentioned yaw system braking assembly, it also has the above-mentioned structure and beneficial effects. Other structures refer to the prior art and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Schematic diagram of the installation of the yaw system braking assembly and the frame in the prior art;

[0031] Figure 2 Top view of the yaw system braking assembly disclosed in the embodiment of the present utility model;

[0032] Figure 3 For Figure 2 Cross-sectional view taken along line A-A in

[0033] Figure 4 Schematic diagram of the installation of the yaw system braking assembly, the frame and the brake disc disclosed in the embodiment of the present utility model.

[0034] Among them, 1-1 is a threaded plug, 1-2 is a bushing, and 1-3 is a friction member;

[0035] 2-1 is an oil cup, 2-2 is a first connecting member, 2-3 is a locknut, 2-4 is a second connecting member, 2-5 is a fastening nut, 2-6 is a washer, 2-7 is a fixing member, 2-8 is a guiding bush, 2-9 is a friction plate, 2-10 is a second pressing plate, 2-11 is a spacer shaft, 2-12 is an elastic member, and 2-13 is a first pressing plate;

[0036] 3-1 is a frame, and 3-2 is a brake disc. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The core of the present utility model lies in disclosing a yaw system braking assembly to reduce the impact of the maintenance of the yaw system braking assembly on the normal operation of the wind turbine.

[0038] Another core of the present utility model lies in disclosing a wind turbine comprising the above-mentioned yaw system braking assembly.

[0039] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the utility model content recited in the claims. Further, all the contents of the configurations shown in the following embodiments are not necessarily essential for the solution of the utility model recited in the claims. It should be noted that for ease of description, only parts related to the utility model are shown in the accompanying drawings. Without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0040] Combined with Figure 2 and Figure 3 ( Figure 3 The installation structure of the yaw system brake assembly and the frame 3-1 is also shown), the yaw system brake assembly disclosed in the present utility model includes a guide bushing 2-8, a preloading assembly, a fixing member 2-7, a first connecting member 2-2 and a second connecting member 2-4. A positioning boss for positioning and installing with the frame 3-1 is provided at the first end of the guide bushing 2-8. The preloading assembly is arranged inside the guide bushing 2-8 and has a friction surface exposed outside the guide bushing 2-8. This friction surface is used to abut against the brake disc 3-2 to achieve braking. The fixing member 2-7 is arranged at the second end of the guide bushing 2-8 and is provided with a first connection hole and a second connection hole. The first connecting member 2-2 passes through the first connection hole and abuts against the preloading assembly, and is used to press the preloading assembly against the brake disc 3-2. The second connecting member 2-4 passes through the second connection hole and is used to connect with the frame 3-1 to realize the fixation of the fixing member 2-7 and the frame 3-1.

[0041] Combined with Figure 4 , the acting force of the brake disc 3-2 is applied to the preloading assembly through the friction surface, and then transmitted from the preloading assembly to the first connecting member 2-2. The first connecting member 2-2 can transmit the acting force to the fixing member 2-7 for dispersion, and finally the fixing member 2-7 transmits the acting force to the frame 3-1 through the second connecting member 2-4.

[0042] Compared with the prior art, the utility model adds a force conduction path from the preloading component to the frame, and this conduction path does not include the guiding bushing 2-8. The guiding bushing 2-8 only serves as a mounting part to separate the preloading component and the frame 3-1, and does not receive the axial force of the preloading component, reducing the risk of fracture and failure of the guiding bushing 2-8. When the braking component of the yaw system is subjected to excessive force, the fixing part 2-7, the first connecting part 2-2, and the second connecting part 2-4 will deform or fail prior to the guiding bushing 2-8. At the same time, when the fixing part 2-7, the first connecting part 2-2, or the second connecting part 2-4 needs to be repaired and replaced, the disassembly and assembly operations can be directly carried out from the side of the frame 3-1 facing away from the brake disc 3-2 and with a large operating space, rather than from the side of the frame 3-1 facing the brake disc 3-2 with many components and difficult disassembly and assembly operations. The maintenance is simpler, reducing the impact on the normal operation of the wind turbine, thereby effectively increasing the power generation of the wind farm and improving the economic benefits of the wind farm.

[0043] In a specific embodiment disclosed by the utility model, an adjustment hole communicating with the first connection hole is provided at one end of the fixing part 2-7 facing the guiding bushing 2-8. The adjustment hole can be embedded with the preloading component to facilitate the adaptive adjustment of the axial dimension (exemplarily, the number of disc springs, in combination with the following text) and the installation position of the preloading component.

[0044] Further, in combination with Figure 3 , a positioning hole communicating with the adjustment hole is provided at one end of the fixing part 2-7 facing the guiding bushing 2-8. The positioning hole is arranged at the end of the adjustment hole far from the first connection hole, and the second end of the guiding bushing 2-8 can be embedded into the positioning hole to realize the positioning installation of the fixing part 2-7 and the guiding bushing 2-8.

[0045] In combination with Figure 3 , the preloading component includes a spacing shaft 2-11, an elastic member 2-12, and a friction plate 2-9. The spacing shaft 2-11 and the elastic member 2-12 are both arranged inside the guiding bushing 2-8, and the elastic member 2-12 is sleeved on the spacing shaft 2-11. The spacing shaft 2-11 is used to limit the extreme degree of compression deformation of the elastic member 2-12, and the first connecting part 2-2 is used to press the elastic member 2-12 towards the direction where the brake disc 3-2 is located. The friction plate 2-9 is arranged at one end of the elastic member 2-12 far from the first connecting part 2-2. One end of the friction plate 2-9 is arranged inside the guiding bushing 2-8, and the other end face serves as the above-mentioned friction surface and is exposed outside the guiding bushing 2-8 to abut against the brake disc 3-2.

[0046] Among them, the elastic member 2-12 is usually multiple disc springs, and can also be a helical spring, etc. The friction plate 2-9 can be a polyamide friction plate, etc.

[0047] In combination with Figure 1, the first end of the guiding bushing 2-8 is completely embedded within the frame 3-1, and the end face is flush with the surface of the frame 3-1. The friction surface is exposed outside the guiding bushing 2-8, that is, the friction plate 2-9 protrudes from the surface of the frame 3-1, and at the same time, a preset gap is provided between the brake disc 3-2 and the frame 3-1.

[0048] Further, in order to ensure the uniform pressing effect of the first connecting member 2-2 on the elastic member 2-12, in combination with Figure 3 , the pre-tightening assembly further includes a first pressing plate 2-13. The outer diameter of the first pressing plate 2-13 matches the inner diameter of the guiding bushing 2-8. The first pressing plate 2-13 is arranged between the fixed-distance shaft 2-11, the elastic member 2-12 and the first connecting member 2-2, and the elastic member 2-12 is in contact with the first pressing plate 2-13. By making the end of the first connecting member 2-2 in contact with and pressing the first pressing plate 2-13, the uniform pressing of the first pressing plate 2-13 on the elastic member 2-12 can be ensured.

[0049] Among them, the first pressing plate 2-13 can be a plate-like member with a circular cross-section.

[0050] In order to ensure the uniform force on the friction plate 2-9, the pre-tightening assembly further includes a second pressing plate 2-10. The outer diameter of the second pressing plate 2-10 matches the inner diameter of the guiding bushing 2-8 and can be a plate-like member with a circular cross-section. The second pressing plate 2-10 is arranged between the fixed-distance shaft 2-11, the elastic member 2-12 and the friction plate 2-9, and both the elastic member 2-12 and the friction plate 2-9 are in contact with the second pressing plate 2-10 to uniformly transfer the acting force of the elastic member 2-12 to the friction plate 2-9.

[0051] In order to reduce the wear of the friction plate 2-9, in some embodiments, a first oil injection hole and a second oil injection hole are respectively formed through the first connecting member 2-2 and the pre-tightening assembly, and the first oil injection hole and the second oil injection hole are communicated. An oil cup 2-1 for covering the first oil injection hole is arranged on the first connecting member 2-2. By removing the oil cup 2-1 from the first connecting member 2-2, lubricating grease can be injected into the first oil injection hole, thereby lubricating the mutually contacting surfaces of the brake disc 3-2 and the friction plate 2-9, reducing the wear of the friction plate 2-9, and improving the braking performance.

[0052] In combination with Figure 2 , a plurality of second connection holes are uniformly arranged circumferentially around the first connection hole, and a plurality of second connecting members 2-4 are in one-to-one correspondence with the second connection holes to ensure the reliable fastening of the fixing member 2-7 to the frame 3-1 and the uniformity of the force on the fixing member 2-7.

[0053] In a specific embodiment disclosed by the present utility model, the first connecting member 2-2 is a pre-tightening bolt, and a lock nut 2-3 for tightening with the fixing member 2-7 is threadedly arranged on the first connecting member 2-2. The setting of the lock nut 2-3 enables the pre-tightening of the first connecting member 2-2 on the pre-tightening assembly according to the actual installation situation, and fastens the first connecting member 2-2 and the fixing member 2-7. The second connecting member 2-4 is a stud bolt, its first end is in threaded fit with the machine frame 3-1, the non-threaded section in the middle is in fit with the second connecting hole, and the threaded section at the second end is fastened to the fixing member 2-7 through a fastening nut 2-5 and a washer 2-6. The fixing member 2-7 is a columnar structural member with a cross-section larger than that of the guide bushing 2-8, ensuring the reliability of the connection with the machine frame 3-1.

[0054] When the yaw system braking assembly is stressed, the second connecting member 2-4, the fastening nut 2-5, the washer 2-6 and the fixing member 2-7 replace the guide bushing 2-8 to bear the load, and can transfer the pressure to the machine frame 3-1 to protect the guide bushing 2-8.

[0055] During assembly, first install the guide bushing 2-8 onto the machine frame 3-1, and then sequentially install the friction plate 2-9, the second pressing plate 2-10, the elastic member 2-12, the spacer shaft 2-11, and the first pressing plate 2-13 into the guide bushing 2-8; align the fixing member 2-7 with the guide bushing 2-8 and install it onto the machine frame 3-1, screw in the first connecting member 2-2 to press the friction plate 2-9 against the brake disc 3-2, and make the gap between the machine frame 3-1 and the brake disc 3-2 meet the requirements. Finally, tighten the fixing member 2-7 and the machine frame 3-1 through the second connecting member 2-4; after installation is completed, inject grease by unscrewing the grease cup 2-1.

[0056] Combined Figure 4 With

[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Specific technical means in some embodiments can be partially or wholly incorporated into other embodiments on the premise that they are not explicitly excluded by another embodiment. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A yaw system brake assembly, characterized in that: include: A guide bushing (2-8), wherein a first end of the guide bushing (2-8) is provided with a positioning boss for positioning and mounting with the frame (3-1); A pre-tightening component is arranged in the guide bushing (2-8) and has a friction surface exposed outside the guide bushing (2-8), wherein the friction surface is used to abut against the brake disc (3-2); A fixing member (2-7) is arranged at the second end of the guide bushing (2-8) and is provided with a first connecting hole and a second connecting hole; A first connecting member (2-2) passes through the first connecting hole and is used to press the pre-tightening assembly in the direction where the brake disc (3-2) is located; A second connecting member (2-4) passes through the second connecting hole and is used to be connected to the frame (3-1); An adjustment hole communicating with the first connection hole is provided at one end of the fixing member (2-7) facing the guide bushing (2-8), and the adjustment hole is for the pre-tightening component to be embedded in; a positioning hole communicating with the adjustment hole is provided on the fixing member (2-7), and the positioning hole is provided at one end of the adjustment hole away from the first connection hole, and is for the second end of the guide bushing (2-8) to be embedded in; The first connecting member (2-2) and the pre-tightening assembly are respectively provided with a first oil filling hole and a second oil filling hole, the first oil filling hole is connected to the second oil filling hole, and the first connecting member (2-2) is provided with an oil cup (2-1) for sealing the first oil filling hole.

2. The yaw system brake assembly according to claim 1, characterized in that: The preload assembly comprises: A distance shaft (2-11) is arranged in the guide bushing (2-8); An elastic member (2-12) is arranged in the guide bushing (2-8) and sleeved on the distance shaft (2-11), and the first connecting member (2-2) is used to press the elastic member (2-12) in the direction where the brake disc (3-2) is located; The friction plate (2-9) is arranged at one end of the elastic member (2-12) away from the first connecting member (2-2), one end of which is arranged in the guide bushing (2-8), and the end surface of the other end is the friction surface.

3. The yaw system brake assembly according to claim 2, characterized in that: The pre-tightening assembly further comprises a first pressing plate (2-13), wherein the first pressing plate (2-13) is arranged between the elastic member (2-12) and the first connecting member (2-2), and abuts against the first connecting member (2-2).

4. The yaw system brake assembly according to claim 2, characterized in that: The pre-tightening assembly also includes a second pressing plate (2-10), wherein the second pressing plate (2-10) is arranged between the elastic member (2-12) and the friction plate (2-9).

5. The yaw system brake assembly according to claim 1, characterized in that: The first connecting member (2-2) is a pre-tightening bolt, and a locking nut (2-3) for tightening with the fixing member (2-7) is threadedly provided on the first connecting member (2-2).

6. The yaw system brake assembly according to claim 1, characterized in that: The second connection holes are multiple and evenly arranged in the circumferential direction around the first connection hole, and the second connection members (2-4) are multiple and correspond one to one with the second connection holes.

7. A wind turbine generator set, characterized in that: The invention comprises a frame (3-1), a brake disc (3-2) and a yaw system brake assembly according to any one of claims 1 to 6, wherein a mounting hole is provided on the frame (3-1), the guide bushing (2-8) is arranged in the mounting hole, the positioning boss is positioned and fitted with a step surface of the mounting hole, and the brake disc (3-2) is in contact with the friction surface.

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