Impeller locking device of wind generating set and wind generating set

Abstract

The utility model relates to an impeller locking device of a wind generating set and the wind generating set, the impeller locking device comprises a brake disc, a driving piece, a first brake assembly and a second brake assembly, and the driving piece is in transmission connection with the first brake assembly and the second brake assembly; the brake disc is used for being arranged on a rotating shaft connected with an impeller of the wind generating set. The first braking assembly comprises a limiting plate, the limiting plate can be driven by the driving part to detachably abut against the circumferential face of the braking disc, the second braking assembly comprises an abutting part, and the abutting part can be driven by the driving part to detachably abut against the end face of the braking disc. Thus, when the impeller is locked, the brake disc can be subjected to radial abutting force and axial abutting force, so that the friction force borne by the brake disc when the impeller is locked is increased, and the locking effect is improved.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, specifically to a rotor locking device for a wind turbine generator set and a wind turbine generator set. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind power generation is very environmentally friendly, and wind energy reserves are huge, so it is receiving increasing attention from countries around the world.

[0003] Wind turbine generators typically employ rotor locking mechanisms to secure the rotor and prevent it from continuing to rotate in the locked state under high wind speeds or special circumstances. However, common rotor locking mechanisms usually lock the rotor in place using a limiting force in one direction. This limiting force in one direction provides limited support for the rotor in the locked position, making it prone to locking failure. Utility Model Content

[0004] The purpose of this disclosure is to provide a rotor locking device for a wind turbine generator set and a wind turbine generator set to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, as a first aspect of this disclosure, this disclosure provides a rotor locking device for a wind turbine generator set, including a brake disc, a drive member, a first braking assembly, and a second braking assembly. The drive member is pulsatorically connected to the first braking assembly and the second braking assembly, respectively. The brake disc is used to be mounted on a rotating shaft connected to the rotor of the wind turbine generator set.

[0006] The first braking assembly includes a limiting plate, which is configured to detachably press against the circumferential surface of the brake disc under the drive of the driving member. The second braking assembly includes a pressing member, which is configured to detachably press against the end face of the brake disc under the drive of the driving member.

[0007] Optionally, the number of limiting plates is at least two, the two limiting plates are arranged opposite to each other, and the two limiting plates are configured to move radially toward each other along the brake disc under the drive of the driving member, so that the two limiting plates respectively abut against the circumferential surface of the brake disc.

[0008] Optionally, the limiting plate includes an arc-shaped plate, and the two arc-shaped plates have a pressing surface on the side near the brake disc. The pressing surface is an arc-shaped surface, which is used to detachably abut against the circumferential surface of the brake disc.

[0009] Optionally, the limiting plate further includes an anti-slip layer, the side of which near the brake disc is configured as the pressure surface.

[0010] Optionally, the first braking assembly further includes a rack extending radially along the brake disc, one end of which is connected to the limiting plate, and the other end of which is connected to the output end of the driving member, so that the rack can drive the limiting plate to move radially along the brake disc.

[0011] Optionally, the second braking assembly further includes a brake pad disposed at one end along the axial direction of the brake disc. The side of the brake pad near the brake disc is a first surface, and the side of the brake pad away from the brake disc is a second surface. The pressing member is configured to press against the second surface so that the first surface of the brake pad contacts the end face of the brake disc.

[0012] Optionally, the second braking assembly further includes a transmission rod extending radially along the brake disc, with the pressing member disposed at one end of the transmission rod and the other end of the transmission rod being connected to the output end of the driving member to drive the pressing member to rotate circumferentially along the brake disc.

[0013] Optionally, there are two brake pads, two pressing members, and two transmission rods. The two brake pads are symmetrically arranged along the brake disc, and the two transmission rods are respectively arranged corresponding to the two brake pads. The pressing members are respectively provided at the ends of the two transmission rods away from the driving member so as to press against the corresponding brake pads.

[0014] Optionally, the impeller locking device further includes a mounting bracket for installation inside the nacelle of the wind turbine generator set, wherein the drive component, the first braking assembly, and the second braking assembly are all mounted on the mounting bracket.

[0015] As a second aspect of this disclosure, this disclosure provides a wind turbine generator set, including a shaft, an impeller, and the aforementioned impeller locking device, wherein both the brake disc and the impeller are disposed and circumferentially fixed on the shaft.

[0016] Through the above technical solution, while the limiting plate of the first braking component presses against the circumferential surface of the brake disc, the pressing member of the second braking component presses against the end face of the brake disc. This allows the brake disc to be subjected to radial and axial pressing forces respectively when locking the impeller, thereby increasing the frictional force on the brake disc during impeller locking and improving the locking effect. Furthermore, the pressing forces from different directions can supplement the other if one fails, improving the reliability of the locking device.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a front view schematic diagram of an impeller locking device provided in one embodiment of the present disclosure;

[0020] Figure 2 This is a top view schematic diagram of a partial structure of an impeller locking device provided in one embodiment of the present disclosure, wherein a first braking component is shown, but a second braking component is not shown;

[0021] Figure 3 This is a top view schematic diagram of an impeller locking device provided in one embodiment of the present disclosure, wherein the impeller locking device is in a locked state;

[0022] Figure 4 This is a top view schematic diagram of an impeller locking device provided in one embodiment of the present disclosure, wherein the impeller locking device is not in a locked state.

[0023] Explanation of reference numerals in the attached figures

[0024] 100-Impeller locking device; 1-Brake disc; 2-Drive component; 21-Drive sleeve; 3-First braking assembly; 31-Limiting plate; 311-Anti-slip layer; 312-Arc plate; 313-Extension plate; 32-Rack; 33-Gear; 4-Second braking assembly; 41-Pressure component; 411-First pressure surface; 412-Second pressure surface; 42-Brake pad; 421-First surface; 422-Second surface; 43-Transmission rod; 431-First section; 432-Second section; 44-Connecting arm. Detailed Implementation

[0025] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0026] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" are generally defined based on the state of the impeller locking device during normal operation. They are used only for the convenience of describing this disclosure and for simplification, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational construction and operation, and therefore should not be construed as limiting this disclosure. "Inner" and "outer" refer to the inside and outside of the outline of the corresponding component. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0028] As a first aspect of this disclosure, such as Figures 1 to 4 As shown, this disclosure provides a rotor locking device 100 for a wind turbine generator set, including a brake disc 1, a drive component 2, a first brake assembly 3, and a second brake assembly 4. The drive component 2 is connected to the first brake assembly 3 and the second brake assembly 4 respectively. The brake disc 1 is used to be mounted on the rotating shaft connected to the rotor of the wind turbine generator set.

[0029] The first braking assembly 3 includes a limiting plate 31, which is configured to be able to detachably press against the circumferential surface of the brake disc 1 under the drive of the driving member 2. The second braking assembly 4 includes a pressing member 41, which is configured to be able to detachably press against the end face of the brake disc 1 under the drive of the driving member 2.

[0030] A wind turbine generator set includes an rotor and a shaft connected to the rotor. The shaft transmits the rotation of the rotor to the generator, driving the generator to rotate and generate electricity. A brake disc 1 is mounted on the shaft between the rotor and the generator to restrict the rotation of the shaft.

[0031] Through the above technical solution, while the limiting plate 31 of the first braking assembly 3 presses against the circumferential surface of the brake disc 1, the pressing member 41 of the second braking assembly 4 presses against the end face of the brake disc 1. This allows the brake disc 1 to be subjected to radial and axial pressing forces respectively when locking the impeller, thereby increasing the frictional force on the brake disc 1 when locking the impeller and improving the locking effect. Furthermore, the pressing forces from different directions can supplement the other if one fails, improving the reliability of the locking device.

[0032] To further increase the contact area between the limiting plate 31 and the brake disc 1, optionally, such as Figure 1 and Figure 2As shown, there are at least two limiting plates 31, which are arranged opposite to each other. The two limiting plates 31 are configured to move radially toward each other under the drive of the drive member 2, so that the two limiting plates 31 press against the circumferential surface of the brake disc 1 respectively. Under the drive of the drive member 2, the two limiting plates 31 can move radially along the brake disc 1, that is, closer to the brake disc 1 or farther away from the brake disc 1. When braking the impeller, the two limiting plates 31 can press against the circumferential surface of the brake disc 1 respectively, thereby applying a pressure to stop the rotation of the brake disc 1 at different radial positions, increasing the locking force of the first braking assembly 3 on the brake disc 1, and further improving the locking effect of the impeller locking device 100 on the impeller.

[0033] This disclosure does not limit the shape of the limiting plate 31. In one embodiment provided in this disclosure, such as Figure 2 As shown, the limiting plate 31 includes arc-shaped plates 312. The two arc-shaped plates 312 have a pressing surface on the side near the brake disc 1. This pressing surface is arc-shaped and is used to separably abut against the circumferential surface of the brake disc 1. Since the brake disc 1 is a disc, the limiting plate 31 locks the impeller connected to the brake disc 1 by contacting the circumferential surface of the brake disc 1. By setting the limiting plate 31 as an arc-shaped plate 312 and the pressing surface of the limiting plate 31 against the brake disc 1 as an arc-shaped surface, the contact area between the limiting plate 31 and the circumferential surface of the brake disc 1 can be increased, thereby increasing the friction between the limiting plate 31 and the brake disc 1 when locking the impeller and improving the locking effect.

[0034] Optionally, such as Figure 2 As shown, the limiting plate 31 also includes an anti-slip layer 311, the side of the anti-slip layer 311 near the brake disc 1 being constructed as a pressure-bearing surface. Since the limiting plate 31 achieves the effect of locking the brake disc 1 and thus locking the impeller by applying pressure to the brake disc 1, providing the anti-slip layer 311 on the side of the limiting plate 31 near the brake disc 1 increases the friction between the limiting plate 31 and the brake disc 1, thereby improving the braking effect. Simultaneously, the anti-slip layer 311 also serves as a protective layer between the brake disc and the limiting plate 31, reducing wear on the limiting plate 31 from the brake disc 1 when locking the impeller.

[0035] It should be noted that this disclosure does not limit the material of the anti-slip layer 311. For example, the anti-slip layer 311 can be a rubber anti-slip layer 311 or a metal anti-slip layer 311, as long as it can achieve the effect of increasing the friction between the limit plate 31 and the brake disc 1.

[0036] This disclosure does not limit the driving method of the first braking component 3. In one embodiment provided in this disclosure, such as Figure 2As shown, the first braking assembly 3 may further include a rack 32, which extends radially along the brake disc 1. One end of the rack 32 is connected to a limiting plate 31, and the other end is connected to the output end of the drive unit 2, so that the rack 32 can drive the limiting plate 31 to move radially along the brake disc 1. The drive unit 2 may be a motor, and a gear 33 is fitted on the output end of the motor. The gear 33 meshes with the rack 32, and the rack 32 can move radially along the brake disc 1 as the gear 33 rotates. Since the other end of the rack 32 is connected to the limiting plate 31, when the rack 32 moves, it can also drive the limiting plate 31 to move, thereby enabling the limiting plate 31 to also move radially along the brake disc 1, thus clamping the brake disc 1 and locking the impeller.

[0037] Optionally, such as Figure 2 As shown, the limiting plate 31 may include a connected arc-shaped plate 312 and an extension plate 313, wherein the arc-shaped plate 312 extends along the circumference of the brake disc 1, the extension plate 313 extends along the radial direction of the brake disc 1, one end of the extension plate 313 is connected to the arc-shaped plate 312, and the other end of the extension plate 313 is connected to the rack 32, so as to drive the arc-shaped plate 312 to move radially along the brake disc 1.

[0038] To improve the locking effect of the impeller locking device 100, optionally, such as Figure 1 , Figure 3 and Figure 4 As shown, the second braking assembly 4 also includes a brake pad 42, which is disposed at one end along the axial direction of the brake disc 1. The side of the brake pad 42 facing the brake disc 1 is a first surface 421, and the side of the brake pad 42 facing away from the brake disc 1 is a second surface 422. The pressing member 41 is configured to press against the second surface 422 so that the first surface 421 of the brake pad 42 contacts the end face of the brake disc 1. When the wind turbine rotor rotates normally, there is a gap between the brake pad 42 and the end face of the brake disc 1 to ensure normal rotor rotation. When the rotor locking device 100 starts to work, the driving member 2 drives the pressing member 41 so that the pressing member 41 can press against the second surface 422 of the brake pad 42.

[0039] Due to the compression of the pressing member 41, the brake pad 42 shifts and moves towards the brake disc 1, reducing the gap between the brake pad 42 and the brake disc 1 until the first surface 421 of the brake pad 42 comes into contact with the end face of the brake disc 1, thereby stopping the rotation of the brake disc 1 through friction. When the impeller needs to resume rotation, the pressing member 41 can separate from the second surface 422 of the brake pad 42 under the drive of the driving member 2, and the brake pad 42 can return to a state where there is a gap between it and the brake disc 1.

[0040] Optionally, such as Figure 3 and Figure 4As shown, the second braking assembly 4 may also include a connecting arm 44, with a brake pad 42 disposed at one end of the connecting arm 44, and the other end of the connecting arm 44 used to connect to the mounting bracket of the impeller locking device 100 to fix the brake pad 42 to one side of the end face of the brake disc 1.

[0041] To provide resistance to pressure, alternatively, such as Figure 1 , Figure 3 and Figure 4 As shown, the second braking assembly 4 also includes a transmission rod 43, which extends radially along the brake disc 1. A pressing member 41 is disposed at one end of the transmission rod 43, and the other end of the transmission rod 43 is connected to the output end of the drive member 2 to drive the pressing member 41 to rotate circumferentially along the brake disc 1. The drive member 2 can be a drive motor, with one end of the transmission rod 43 connected to the output end of the drive motor, and the pressing member 41 disposed at the other end of the transmission rod 43. When the impeller locking device 100 starts working, the drive motor can drive the transmission rod 43 to rotate circumferentially along the brake disc 1, and the brake pad 42 is located at a point in the circumferential direction of the brake disc 1. As the transmission rod 43 rotates, the pressing member 41 located at one end of the transmission rod 43 can contact and press the second surface 422 of the brake pad 42, thereby causing the first surface 421 of the brake pad 42 to contact the end face of the brake disc 1.

[0042] When the impeller needs to resume rotation, the drive motor can drive the transmission rod 43 to rotate in the opposite direction to the previous direction along the circumference of the brake disc 1, thereby separating the pressing member 41 and the brake pad 42, so that the brake pad 42 can be restored to a state where there is a gap between it and the brake disc 1.

[0043] Optionally, such as Figure 1 The output end of the drive motor can be fitted with a drive sleeve 21, and one end of the transmission rod 43 is connected to the drive sleeve 21. The drive sleeve 21 can rotate as the output end of the drive motor rotates, thereby driving the transmission rod 43 to rotate.

[0044] Optionally, such as Figure 1 As shown, the transmission rod 43 can be an L-shaped transmission rod 43. The L-shaped transmission rod 43 may include a first section 431 extending radially along the brake disc 1 and a second section 432 extending axially along the brake disc 1. Since the pressing member 41 presses against the brake pad 42 located on one side of the end face of the brake disc 1, the impeller is locked by the brake disc 1. The first section 431 extending radially along the brake disc 1 transmits the torque of the drive motor to the second section 432 extending axially along the transmission rod 43. The second section 432 extending axially allows the pressing member 41 to be positioned close to the end face of the brake disc 1, thereby locking the brake disc 1 by the brake pad 42.

[0045] Optionally, such as Figure 1As shown, the pressing member 41 has a first pressing surface 411 and a second pressing surface 412 connected together, wherein the first pressing surface 411 is an inclined surface, and the second pressing surface 412 is used to abut against the second surface 422 of the brake pad 42. The brake pad 42 is disposed on a circumference close to the brake disc 1 and whose center is coaxial with the center of the brake disc 1, and the first pressing surface 411 is disposed at one end of the pressing member 41 close to the brake pad 42.

[0046] When the pressing member 41 rotates around the brake disc 1 under the drive of the transmission rod 43, the first pressing surface 411 first contacts the brake pad 42. Since the first pressing surface 411 is an inclined surface, as the pressing member 41 moves around the brake disc 1, the inclined surface can guide the pressing member 41 to cover the second surface 422 of the brake pad 42, so that the second pressing surface 412 abuts against the second surface 422, thereby making the first surface 421 of the brake pad 42 fit against the end face of the brake disc 1.

[0047] Optionally, such as Figure 3 and Figure 4 As shown, there are two brake pads 42, two pressing members 41, and two transmission rods 43. The two brake pads 42 are symmetrically arranged along the brake disc 1, and the two transmission rods 43 are respectively arranged corresponding to the two brake pads 42. The ends of the two transmission rods 43 away from the drive member 2 are respectively provided with pressing members 41 to press against the corresponding brake pads 42. The two brake pads 42 are located at different positions forming a circle along the circumference of the brake disc 1, thereby pressing against the brake disc 1 at different positions on the end face of the brake disc 1, improving the stability of the locking. The pressing members 41 and transmission rods 43, which are arranged corresponding to the brake pads 42, can provide pressing force to the two brake pads 42 respectively, so that the second surface 422 of the brake pads 42 is in contact with the end face of the brake disc 1.

[0048] Optionally, the impeller locking device 100 further includes a mounting bracket for installation within the nacelle of the wind turbine generator set. The drive component 2, the first braking assembly 3, and the second braking assembly 4 are all mounted on the mounting bracket. The mounting bracket may include a support frame and a mounting body. The mounting body is mounted at one end of the support frame, and the other end of the support frame is located on the bottom surface of the nacelle of the wind turbine generator set. The drive motor is mounted on the support frame. The mounting body may have a through hole. The drive motor is located on one side of the mounting body, and its output end passes through the through hole and is connected to the rack 32 and transmission rod 43 located on the other side of the mounting body.

[0049] The mounting body also has a groove extending radially along the brake disc 1, and a slider is provided on the side of the extension plate 313 away from the brake disc 1, and the slider is slidably disposed in the groove.

[0050] Optionally, the mounting bracket can also be installed at one end of the wind turbine generator set's gearbox. Since the brake disc 1 is typically installed on the shaft at the gearbox inlet or outlet, installing the mounting bracket at one end of the gearbox allows the impeller locking device 100 to be connected to the gearbox, thereby providing locking force for the first braking assembly 3 and the second braking assembly 4 when locking the impeller.

[0051] As a second aspect of this disclosure, this disclosure also provides a wind turbine generator set, including a shaft, an impeller and the aforementioned impeller locking device 100, wherein both the brake disc 1 and the impeller are provided and circumferentially fixed on the shaft.

[0052] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0053] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0054] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A rotor locking device for a wind turbine generator set, characterized in that, It includes a brake disc, a drive component, a first brake assembly, and a second brake assembly. The drive component is connected to the first brake assembly and the second brake assembly respectively. The brake disc is used to be mounted on a rotating shaft connected to the rotor of the wind turbine generator set. The first braking assembly includes a limiting plate, which is configured to detachably press against the circumferential surface of the brake disc under the drive of the driving member. The second braking assembly includes a pressing member, which is configured to detachably press against the end face of the brake disc under the drive of the driving member.

2. The impeller locking device according to claim 1, characterized in that, The number of limiting plates is at least two, the two limiting plates are arranged opposite to each other, and the two limiting plates are configured to move towards each other radially along the brake disc under the drive of the driving member, so that the two limiting plates respectively abut against the circumferential surface of the brake disc.

3. The impeller locking device according to claim 2, characterized in that, The limiting plate includes an arc-shaped plate, and the two arc-shaped plates have a pressing surface on the side near the brake disc. The pressing surface is an arc-shaped surface, which is used to detachably abut against the circumferential surface of the brake disc.

4. The impeller locking device according to claim 3, characterized in that, The limiting plate also includes an anti-slip layer, and the side of the anti-slip layer near the brake disc is configured as the pressure surface.

5. The impeller locking device according to claim 1, characterized in that, The first braking assembly further includes a rack extending radially along the brake disc. One end of the rack is connected to the limiting plate, and the other end of the rack is connected to the output end of the drive member, so that the rack can drive the limiting plate to move radially along the brake disc.

6. The impeller locking device according to any one of claims 1-5, characterized in that, The second braking assembly further includes a brake pad disposed at one end along the axial direction of the brake disc. The side of the brake pad close to the brake disc is a first surface, and the side of the brake pad away from the brake disc is a second surface. The pressing member is configured to press against the second surface so that the first surface of the brake pad contacts the end face of the brake disc.

7. The impeller locking device according to claim 6, characterized in that, The second braking assembly further includes a transmission rod that extends radially along the brake disc. The pressing member is disposed at one end of the transmission rod, and the other end of the transmission rod is connected to the output end of the driving member to drive the pressing member to rotate circumferentially along the brake disc.

8. The impeller locking device according to claim 7, characterized in that, There are two brake pads, two pressing members, and two transmission rods. The two brake pads are symmetrically arranged along the brake disc, and the two transmission rods are respectively arranged corresponding to the two brake pads. The pressing members are respectively provided at the ends of the two transmission rods away from the driving member so as to press against the corresponding brake pads.

9. The impeller locking device according to any one of claims 1-5, characterized in that, The impeller locking device also includes a mounting bracket, which is used to be installed inside the nacelle of the wind turbine generator set. The drive component, the first braking component, and the second braking component are all installed on the mounting bracket.

10. A wind turbine generator set, characterized in that, The device includes a rotating shaft, an impeller, and an impeller locking device according to any one of claims 1-9, wherein the brake disc and the impeller are both disposed on and circumferentially fixed on the rotating shaft.

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