Transmission and wind turbine

Abstract

The application discloses a transmission and a wind driven generator. The transmission comprises a housing, a low-speed shaft, a high-speed shaft, a transmission assembly, a brake disc, a brake and a locking assembly. The brake disc is sleeved on the high-speed shaft. The brake is connected to the housing. The locking assembly is connected to the housing. The brake and the locking assembly are separated from each other. The transmission provided by the application is characterized in that the locking assembly is directly connected to the housing, and the limiting force borne by the locking assembly during operation can be directly transmitted to the housing, without being transmitted through the brake. Therefore, the design freedom of the locking assembly can be improved.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a transmission and a wind turbine. Background Technology

[0002] The gearbox in a wind turbine is equipped with a brake and a locking assembly. The brake and locking assembly work together to lock the brake disc (wind rotor) when needed.

[0003] Currently, the brake is located in the gearbox housing, and the locking component is located in the brake. When designing the locking component, the brake must be considered, resulting in limited design freedom for the locking component. Utility Model Content

[0004] The purpose of this application is to provide a transmission and a wind turbine that increase the design freedom of the locking components.

[0005] To achieve the above objectives, this application provides a transmission, which includes a housing, a low-speed shaft, a high-speed shaft, a transmission assembly, a brake disc, a brake, and a locking assembly. The low-speed shaft is rotatably mounted on the housing and is used to connect to the rotor of a wind turbine. The high-speed shaft is rotatably mounted on the housing and is used to connect to the generator of the wind turbine. The transmission assembly is connected to both the low-speed and high-speed shafts and is used to adjust the speed ratio between the two shafts. The brake disc is fitted onto the high-speed shaft. The brake is connected to the housing and is used to contact the brake disc to resist rotation of the brake disc through friction. The locking assembly is connected to the housing and is used to limit the position of the brake disc in its circumferential direction. The brake and the locking assembly are separate from each other.

[0006] Optionally, the locking assembly includes a mounting base and a first locking pin. The mounting base is connected to the housing. The first locking pin is disposed on the mounting base. The brake disc has an axially extending locking hole, into which the first locking pin is detachably inserted.

[0007] Optionally, the mounting base includes a fixing part, a first mounting part, and a second mounting part. The fixing part is connected to the housing. The first mounting part protrudes from the fixing part and has a first mounting hole extending axially. The second mounting part protrudes from the fixing part, and the first and second mounting parts are respectively disposed on opposite sides of the brake disc in the axial direction. The second mounting part has a second mounting hole extending axially. A first locking pin is detachably inserted into both the first and second mounting holes.

[0008] Optionally, the first locking pin includes a first segment and a second segment. The first segment is detachably inserted into the first mounting hole, the locking hole, and the second mounting hole. The second segment is disposed at one axial end of the first segment and protrudes from the first segment in a direction perpendicular to the axial direction. The second segment is used to abut against the first mounting portion along the axial direction.

[0009] Optionally, the first locking pin is a stepped shaft structure, the first sub-segment and the second sub-segment are two coaxial cylindrical segments, and the diameter of the second sub-segment is larger than the diameter of the first sub-segment, so that a shoulder is formed at the connection between the first sub-segment and the second sub-segment, and the second sub-segment abuts against the first mounting part along the first direction through the shoulder.

[0010] Optionally, the locking assembly also includes a limiting member, which is detachably disposed on the first locking pin for axially abutting against the second mounting portion.

[0011] Optionally, the limiting member includes a main body and a limiting part. The limiting part can selectively be in a first state and a second state relative to the main body. In the first state, the limiting part and the main body form a closed annular structure. In the second state, a notch is formed between the limiting part and the main body. The first locking pin has a through hole and is fitted onto the limiting part through the through hole. The first locking pin can disengage from the limiting part through the notch. The main body and / or the limiting part is used to abut against the second mounting part axially.

[0012] Optionally, the locking assembly also includes a sensor disposed on the mounting base for detecting whether the first locking pin is located at a predetermined position on the mounting base.

[0013] Optionally, the first locking pin is a rotating body with its central axis parallel to the axial direction of the brake disc.

[0014] Optionally, the locking assembly further includes a second locking pin, which is disposed on the mounting base and spaced circumferentially from the first locking pin on the brake disc. Multiple locking holes are arranged circumferentially on the brake disc, with the first locking pin detachably inserted into one of the locking holes and the second locking pin detachably inserted into another locking hole.

[0015] On the other hand, this application also provides a wind turbine, which includes a wind turbine, a generator, and a transmission. The wind turbine is used to rotate under the action of wind. The generator is used to convert mechanical energy into electrical energy. The transmission is connected between the wind turbine and the generator and is used to transmit the power of the wind turbine to the generator. The transmission is any of the transmissions described above.

[0016] The technical solution described in this application has the following advantages over the prior art: The locking component is directly connected to the housing, and the limiting force it bears during operation can be directly transmitted to the housing without the need for a brake. This eliminates the need to increase the structural strength of the brake to accommodate the load-bearing requirements of the locking component, thus avoiding excessive brake performance. The locking component can be independently designed with parameters such as load-bearing capacity and installation location. This application increases the design freedom of the locking component. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the wind turbine generator of this application; Figure 2 yes Figure 1 A three-dimensional structural diagram of the brake disc in the wind turbine generator from a first-view perspective; Figure 3 yes Figure 1 A three-dimensional structural diagram of the brake disc in the wind turbine generator from a second perspective; Figure 4 yes Figure 1 A cross-sectional view of the locking assembly in the wind turbine with the brake disc locked. Figure 5 yes Figure 1 The diagram shows the switching of the limit component in the wind turbine from the first state to the second state.

[0019] Explanation of reference numerals in the attached figures: 1-Wind turbine; 10-Wind rotor; 110-Hub; 20-Gearbox; 210-Housing; 220-Low-speed shaft; 230-High-speed shaft; 240-Brake disc; 241-Locking hole; 250-Brake; 260-Locking assembly; 261-Mounting base; 2611-Fixing part; 2612-First mounting part; 2613-Second mounting part; 2614-First mounting hole; 2615-Second mounting hole; 262-First locking pin; 2621-First sub-segment; 2622-Second sub-segment; 2623-Shoulder; 2624-Through hole; 263-Second locking pin; 264-Sensor; 265-Limiting component; 2651-Main body; 2652-Limiting component; 2653-Notch; 266-Lifting component; 30-Generator; 310-Input shaft; 320-Generator main body; 40-Main shaft; 50-Bearing; 60-Coupling; L1-Reference axis; L2-Central axis. Detailed Implementation

[0020] The wind turbine rotor is a rotating component. To ensure personal safety, maintenance personnel must lock the rotor when entering it to work or maintain the transmission chain components to prevent injury from its mechanical rotation. The gearbox in the wind turbine is equipped with a brake and a locking assembly. The brake and locking assembly work together to lock the brake disc (wind turbine rotor) when necessary.

[0021] Currently, the brake is housed in the gearbox housing, while the locking assembly is located within the brake. When the locking assembly engages with the brake disc for restraint, the forces it experiences are transmitted to the housing via the brake. Increasing the load-bearing capacity of the locking assembly requires correspondingly increasing the structural strength of the brake; however, in some cases, increasing the brake's structural strength is excessive. Therefore, the design freedom for the locking assembly is limited.

[0022] In the following embodiments of this application, the brake and the locking assembly are separated so that they are each connected to the housing. When designing the locking assembly, the brake does not need to be considered, which increases the design freedom of the locking assembly.

[0023] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the wind turbine generator 1 of this application.

[0024] The wind turbine 1 includes a wind rotor 10, a generator 30, and a gearbox 20.

[0025] The wind turbine 10 is used to rotate under the action of wind power. The wind turbine 10 is used to convert wind energy into mechanical energy. The wind turbine 10 includes a hub 110 and blades (not shown). The hub 110 connects the blades to the main shaft 40. The main shaft 40 is rotatably mounted via two bearings 50.

[0026] Generator 30 is used to convert mechanical energy into electrical energy.

[0027] The gearbox 20 is connected between the wind turbine 10 and the generator 30, and is used to transmit the power of the wind turbine 10 to the generator 30.

[0028] Specifically, the transmission 20 includes a housing 210, a low-speed shaft 220, a high-speed shaft 230, and a transmission assembly (not shown).

[0029] The low-speed shaft 220 is rotatably mounted on the housing 210 and is used to connect the wind turbine 10 of the wind turbine generator 1. Specifically, the low-speed shaft 220 of the gearbox 20 is connected to the main shaft 40, and the power of the wind turbine 10 is transmitted to the low-speed shaft 220 through the main shaft 40.

[0030] The transmission assembly is connected to the low-speed shaft 220 and the high-speed shaft 230 respectively, and is used to adjust the speed ratio between the low-speed shaft 220 and the high-speed shaft 230. The power of the low-speed shaft 220 is transmitted to the high-speed shaft 230 through the transmission assembly.

[0031] A high-speed shaft 230 is rotatably mounted on the housing 210 for connecting to the generator 30 of the wind turbine generator 1. Specifically, the generator 30 includes a generator body 320 and an input shaft 310. The high-speed shaft 230 of the gearbox 20 is connected to the input shaft 310 of the generator 30 via a coupling 60. Power from the high-speed shaft 230 is transmitted to the input shaft 310 of the generator 30 via the coupling 60.

[0032] Please refer to the following: Figure 2 and Figure 3 , Figure 2 yes Figure 1 A three-dimensional structural diagram of the brake disc at position 240 in the wind turbine generator 1, viewed from a first-person perspective. Figure 3 yes Figure 1 A three-dimensional structural schematic diagram of the brake disc 240 in the wind turbine generator 1 from a second perspective. Figure 2 and Figure 3 The housing 210 is not shown in the diagram.

[0033] Brake disc 240 is mounted on high-speed shaft 230. Driven by high-speed shaft 230, brake disc 240 rotates around reference axis L1. Brake disc 240 has axial, radial, and circumferential directions. Axial direction is the direction of extension of reference axis L1. In the following text, unless otherwise specified, axial direction refers to the axial direction of brake disc 240, radial direction refers to the radial direction of brake disc 240, and circumferential direction refers to the circumferential direction of brake disc 240. In the figure, the third direction D3 is the circumferential direction.

[0034] The outer peripheral edge of the brake disc 240 is toothed for rotation. Rotation specifically refers to the process of manually engaging the teeth of the brake disc 240 with a special device while the equipment is stopped, thereby rotating the brake disc 240 to a predetermined position.

[0035] The brake 250 is connected to the housing 210 and is used to contact the brake disc 240 to resist the rotation of the brake disc 240 by friction.

[0036] In some embodiments, the brake 250 includes an actuator and a drive unit. The actuator includes a brake caliper (fixed to the housing 210) and brake pads, which are friction contact components and are replaceable. The drive unit is primarily a hydraulic system, which uses hydraulic oil pressure to push a piston, causing the brake pads to clamp the brake disc 240.

[0037] The working process of brake 250 is as follows.

[0038] The control system activates the brake 250 based on a stop command, fault signal, or manual operation.

[0039] The hydraulic system is pressurized, and the piston pushes the brake pads toward the brake disc 240 until they are in close contact.

[0040] The friction between the brake pads and the brake disc 240 prevents the brake disc 240 from rotating. This friction is transmitted through the high-speed shaft 230 to the transmission assembly and the low-speed shaft 220, ultimately causing the impeller 10 to stop rotating.

[0041] After braking is completed, the hydraulic system is depressurized, the return spring drives the brake pads back to their original position, and the brake disc 240 returns to a rotatable state.

[0042] Locking assembly 260 is connected to housing 210 and is used to limit the position of brake disc 240 in its circumferential direction. Specifically, locking assembly 260 is used to restrict the circumferential rotation of brake disc 240 by means of a physical limiting structure.

[0043] In one application scenario, the brake 250 works in conjunction with the locking assembly 260 to lock the brake disc 240 as follows.

[0044] The brake 250 clamps the brake disc 240, causing the high-speed shaft 230 (and the impeller 10) to decelerate and come to a complete stop, providing a stable basis for locking.

[0045] If the limiting structure of the brake disc 240 is not aligned with the locking component 260, the limiting structure of the brake disc 240 can be adjusted to be aligned with the locking component 260 by rotating the shaft system through the cranking operation.

[0046] When the locking component 260 is engaged with the brake disc 240, the locking component 260 and the limiting structure of the brake disc 240 form a rigid block, directly restricting the circumferential rotation of the brake disc 240.

[0047] After maintenance, the limiting engagement structure between the locking component 260 and the brake disc 240 is released, thereby removing the circumferential restriction on the brake disc 240; subsequently, the brake 250 is released, and the brake disc 240 returns to a rotatable state.

[0048] The brake 250 and the locking assembly 260 are separate from each other.

[0049] The brake 250 and the locking assembly 260 are separate, meaning they are independent in terms of structural installation, functional implementation, and force transmission, with no direct connection or dependency. Specifically, each is directly connected to the housing 210 of the transmission 20, without any mechanical fixing or linkage structure. Functionally, the brake 250 achieves shaft deceleration or temporary braking solely through the friction between the brake pads and the brake disc 240, while the locking assembly 260 achieves circumferential positioning and locking of the brake disc 240 solely through a physical limiting structure. Their functions do not interfere with or depend on each other. In terms of force transmission, the frictional load generated by the brake 250 during braking and the circumferential force borne by the locking assembly 260 during limiting are both directly transmitted to the housing 210 through their respective installation structures, without needing to pass through each other, and without transmitting loads to each other and affecting their respective working states.

[0050] If the brake disc 240 is subjected to external forces such as wind load and tends to rotate, the force will be directly transmitted to the locking component 260 through the limiting structure, and then transmitted to the housing 210 by the locking component 260, without passing through the brake 250.

[0051] In this embodiment, the locking component 260 is directly connected to the housing 210, and the limiting force it bears during operation can be directly transmitted to the housing 210 without the need for the brake 250 as an intermediary. This eliminates the need to increase the structural strength of the brake 250 to meet the load-bearing requirements of the locking component 260, thus avoiding overkill in the brake 250. The locking component 260 can be independently designed with parameters such as load-bearing capacity and installation position. This application increases the design freedom of the locking component 260.

[0052] Please see Figure 4 , Figure 4 yes Figure 1 A cross-sectional view of the locking assembly 260 of the wind turbine generator 1 in the locked brake disc 240 state.

[0053] The locking assembly 260 includes a mounting base 261 and a first locking pin 262. The mounting base 261 is connected to the housing 210. The first locking pin 262 is disposed on the mounting base 261. The brake disc 240 has an axially extending locking hole 241, in which the first locking pin 262 is detachably inserted.

[0054] When the first locking pin 262 is inserted into the locking hole 241, it prevents the brake disc 240 from rotating in the circumferential direction, thereby limiting the brake disc 240. When it is necessary to release the limitation on the brake disc 240, the first locking pin 262 can be pulled out from the locking hole 241.

[0055] In this embodiment, the locking component 260 locks the brake disc 240 as follows.

[0056] After the brake disc 240 comes to a stop, the shaft system is rotated by manual or automatic rotator operation to drive the brake disc 240 to make circumferential fine adjustments until the locking hole 241 is aligned with the first locking pin 262. The first locking pin 262 is then extended axially and passes through the locking hole 241 of the brake disc 240.

[0057] In this embodiment, the first locking pin 262 and the axially penetrating locking hole 241 of the brake disc 240 form a mechanical limiting structure. The contact area is large and the limiting gap is small, which can effectively resist the impact of external forces such as wind load and prevent the brake disc 240 from moving around in the circumferential direction after locking.

[0058] Please continue reading. Figure 4 In some embodiments, the mounting base 261 includes a fixing portion 2611, a first mounting portion 2612, and a second mounting portion 2613. The fixing portion 2611 is connected to the housing 210. The first mounting portion 2612 protrudes from the fixing portion 2611 and has a first mounting hole 2614 extending axially. The second mounting portion 2613 protrudes from the fixing portion 2611. The first mounting portion 2612 and the second mounting portion 2613 are respectively disposed on both sides of the brake disc 240 in the axial direction. The second mounting portion 2613 has a second mounting hole 2615 extending axially. A first locking pin 262 is detachably inserted into the first mounting hole 2614 and the second mounting hole 2615, respectively.

[0059] Specifically, the mounting base 261 is generally C-shaped and is fitted onto the outer edge of the brake disc 240.

[0060] In this embodiment, the first locking pin 262 adopts a uniform axial insertion fit method, forming a separable fit relationship with the first mounting hole 2614, the second mounting hole 2615 of the mounting base 261, and the locking hole 241 of the brake disc 240, respectively. The fit reference of the three is the central axis L2 of the first locking pin 262, and the fit form is completely consistent. This design allows the installation and removal of the first locking pin 262 to be completed simply by linear movement along its own axial direction, without the need to adapt to different connection methods or adjust the operating angle, making the operation path uniform and simple.

[0061] In addition, the mounting base 261 is located on both sides of the axial direction of the brake disc 240 through the first mounting part 2612 and the second mounting part 2613 respectively. It is engaged with the outer edge of the brake disc 240 in conjunction with the "C" shaped structure. Compared with the design of setting a single mounting part on only one side of the brake disc 240, this double-sided support structure allows both ends of the first locking pin 262 to obtain rigid support from the mounting base 261, forming a stable "two-end support" mode, rather than a "cantilever support" installed on one side. This structure not only effectively restricts the radial movement of the first locking pin 262, but also disperses the circumferential impact load on the brake disc 240 borne by the first locking pin 262, preventing bending deformation of the first locking pin 262 due to unilateral force. At the same time, the first mounting part 2612 and the second mounting part 2613 evenly distribute the load transmitted by the first locking pin 262 to the entire mounting base 261, and then smoothly transmit it to the housing 210 through the fixing part 2611, reducing local stress concentration and significantly improving the support rigidity and load-bearing stability of the mounting base 261 for the first locking pin 262.

[0062] Please continue reading. Figure 4 In some embodiments, the first locking pin 262 includes a first segment 2621 and a second segment 2622. The first segment 2621 is detachably inserted into the first mounting hole 2614, the locking hole 241, and the second mounting hole 2615. The second segment 2622 is disposed at one axial end of the first segment 2621 and protrudes from the first segment 2621 in a direction perpendicular to the axial direction. The second segment 2622 is used to axially abut against the first mounting portion 2612.

[0063] Specifically, the second segment 2622 is used to abut against the first mounting portion 2612 along the first direction D1 to restrict the degree of freedom of the first locking pin 262 relative to the mounting base 261 in the first direction D1. The first direction D1 is parallel to the axial direction of the brake disc 240.

[0064] When the brake disc 240 experiences a slight axial displacement of the shaft system (such as thermal expansion and contraction or vibration during operation), causing the first segment 2621 to tend to move axially, the rigid contact between the second segment 2622 and the first mounting part 2612 will form a clear axial limit, preventing the first segment 2621 from accidentally dislodging from the first mounting hole 2614, the locking hole 241, or the second mounting hole 2615, ensuring that the first locking pin 262 always maintains effective locking of the brake disc 240, thus structurally eliminating the risk of locking failure caused by axial displacement.

[0065] In addition, the first segment 2621 needs to be inserted into the first mounting hole 2614, the locking hole 241, and the second mounting hole 2615 simultaneously, while the second segment 2622 can serve as an axial positioning reference. When the first segment 2621 is inserted axially until the second segment 2622 abuts against the first mounting part 2612, it can be visually confirmed that the first locking pin 262 has been inserted to the preset depth (no additional detection device is required), ensuring that the mating length of the first segment 2621 with the first mounting hole 2614, the locking hole 241, and the second mounting hole 2615 respectively meets the standard.

[0066] Please continue reading. Figure 4 In some embodiments, the first locking pin 262 is a stepped shaft structure, the first sub-segment 2621 and the second sub-segment 2622 are two coaxial cylindrical segments, and the diameter of the second sub-segment 2622 is larger than the diameter of the first sub-segment 2621, so that a shoulder 2623 is formed at the connection between the first sub-segment 2621 and the second sub-segment 2622, and the second sub-segment 2622 abuts against the first mounting portion 2612 along the first direction D1 through the shoulder 2623.

[0067] The first segment 2621 and the second segment 2622 are coaxially arranged and both are cylindrical structures. They can be formed in one step by turning during processing, which is easy to process and easy to control the tolerance. This can reduce the assembly error of the first locking pin 262 with the first mounting hole 2614, the locking hole 241 and the second mounting hole 2615 respectively, and improve the fit accuracy of the overall structure.

[0068] Please continue reading. Figure 4 In some embodiments, the locking assembly 260 further includes a limiting member 265, which is detachably disposed on the first locking pin 262 for axially abutting against the second mounting portion 2613.

[0069] Specifically, when the limiting member 265 is disposed on the first locking pin 262, it abuts against the second mounting portion 2613 along the second direction D2 to restrict the degree of freedom of the first locking pin 262 relative to the mounting base 261 in the second direction D2. The second direction D2 is parallel to the axial direction of the brake disc 240. When the limiting member 265 is removed from the first locking pin 262, the first locking pin 262 can be pulled out from the first mounting hole 2614, the locking hole 241, and the second mounting hole 2615 along the second direction D2, thereby releasing the locking of the brake disc 240.

[0070] When the brake disc 240 causes the first segment 2621 to move axially due to a slight axial displacement of the shaft system (such as thermal expansion and contraction, vibration, etc. during operation), the rigid contact between the limiting member 265 and the second mounting part 2613 will form a clear axial limit, preventing the first segment 2621 from accidentally coming out of the first mounting hole 2614, the locking hole 241 or the second mounting hole 2615, and ensuring that the first locking pin 262 always maintains effective locking of the brake disc 240, thus structurally eliminating the risk of locking failure caused by axial displacement.

[0071] Please see Figure 5 , Figure 5 yes Figure 1 The diagram shows the limit component 265 in the wind turbine generator 1 switching from the first state to the second state. Figure 5 Is Figure 4 The attached diagram is viewed from right to left. The dotted line in the diagram represents gap 2653.

[0072] In some embodiments, the limiting member 265 includes a main body portion 2651 and a limiting portion 2652. The limiting portion 2652 can selectively be in a first state and a second state relative to the main body portion 2651. In the first state, the limiting portion 2652 and the main body portion 2651 form a closed annular structure. In the second state, a notch 2653 is formed between the limiting portion 2652 and the main body portion 2651. The first locking pin 262 has a through hole 2624 (see...). Figure 4 The first locking pin 262 is sleeved on the limiting part 2652 through the through hole 2624. The first locking pin 262 can be disengaged from the limiting part 2652 through the notch 2653. The main body part 2651 and / or the limiting part 2652 are used to abut against the second mounting part 2613 along the axial direction.

[0073] The limiting part 2652 is generally U-shaped, and in the first state, the main body part 2651 is connected to both ends of the limiting part 2652.

[0074] like Figure 5 As shown in part (a), in the first state, the first locking pin 262 is sleeved outside the limiting part 2652. Since the limiting part 2652 and the main body part 2651 form a closed ring structure, the limiting part 2652 will not separate from the first locking pin 262.

[0075] like Figure 5 As shown in part (b), in the second state, the limiting part 2652 can be moved relative to the first locking pin 262, so that the notch 2653 moves to the first locking pin 262, thereby separating the limiting part 2652 from the first locking pin 262, and then removing the limiting member 265 from the first locking pin 262.

[0076] exist Figure 1In the wind turbine generator 1 shown, the limiting member 265 abuts against the second mounting part 2613, restricting the first locking pin 262 from moving relative to the mounting base 261 along the second direction D2. The shoulder 2623 of the first locking pin 262 abuts against the first mounting part 2612, restricting the first locking pin 262 from moving relative to the mounting base 261 along the first direction D1. Thus, the axial position of the first locking pin 262 in the brake disc 240 is limited to a predetermined range, so that the first locking pin 262 will not accidentally disengage from the mounting base 261.

[0077] Please see Figure 2 In some embodiments, the locking assembly 260 further includes a sensor 264 disposed on the mounting base 261 for detecting whether the first locking pin 262 is located at a predetermined position on the mounting base 261.

[0078] In some embodiments, sensor 264 is a limit switch. The first locking pin 262 moves axially to trigger the mechanical contacts of the limit switch to operate, and the mechanical contacts close or open to output an electrical signal.

[0079] In some other embodiments, sensor 264 is a photoelectric sensor 264. The transmitter and receiver are located on opposite sides of the mounting base 261. When the first locking pin 262 is in position, it blocks the light, and the receiver outputs a signal.

[0080] Sensor 264 directly detects whether the first locking pin 262 is inserted into the predetermined position (i.e., fully inserted into the first mounting hole 2614, locking hole 241, and second mounting hole 2615), avoiding errors caused by manual visual inspection (such as misjudgment due to insufficient light or limited space), and completely eliminating the safety risk of the wind turbine 10 rotating unexpectedly during maintenance due to the first locking pin 262 not being fully inserted but being misjudged as fully inserted.

[0081] Sensor 264 continuously monitors the position of the first locking pin 262, rather than just detecting it at the moment of insertion. During the maintenance of the wind turbine 1, if the first locking pin 262 experiences abnormalities such as axial movement or partial dislodgement due to vibration, sensor 264 can promptly capture the signal and provide feedback, allowing maintenance personnel to troubleshoot the fault in advance.

[0082] Please see Figure 4 In some embodiments, the first locking pin 262 is a rotating body, and its central axis L2 is parallel to the axial direction of the brake disc 240.

[0083] The rotating body structure has circumferential symmetry. When the brake disc 240 is subjected to external forces such as wind load and has a tendency to rotate circumferentially, the impact force will be evenly transmitted to the rotating surface of the first locking pin 262 through the inner wall of the locking hole 241, avoiding local stress concentration (such as the corners of non-rotating bodies are prone to cracking under stress).

[0084] Please see Figure 4In some embodiments, the locking assembly 260 further includes a pull member 266 connected to the first locking pin 262. The pull member 266 is generally annular. Maintenance personnel can insert their fingers into the space enclosed by the pull member 266 to facilitate the movement of the first locking pin 262.

[0085] The lifting component 266 is annular and forms a handle space, allowing maintenance personnel to directly insert their fingers into it to apply force without relying on additional tools such as wrenches or pin pullers. Maintenance personnel can drive the first locking pin 262 to move axially (insertion or extraction) with one hand, significantly reducing the difficulty of operation.

[0086] Please see Figure 2 The locking assembly 260 also includes a second locking pin 263, which is disposed on the mounting base 261 and spaced circumferentially from the first locking pin 262 on the brake disc 240. Multiple locking holes 241 are arranged circumferentially on the brake disc 240. The first locking pin 262 is detachably inserted into one of the locking holes 241, and the second locking pin 263 is detachably inserted into another locking hole 241.

[0087] The specific structure of the second locking pin 263 and its connection method with the mounting base 261 can be referred to the first locking pin 262, and will not be repeated here.

[0088] The first locking pin 262 and the second locking pin 263 are circumferentially spaced on the brake disc 240 and are inserted into different locking holes 241, which can disperse the circumferential force on the brake disc 240. Compared with a single locking pin bearing the load alone, the force on each locking pin is significantly reduced, which can effectively prevent bending, breakage, or wear of the locking hole 241 caused by overload of a single locking pin. Even if one locking pin fails (such as jamming, incomplete insertion), is excessively worn, or is accidentally dislodged, the other locking pin can still cooperate with the locking hole 241 to achieve circumferential limiting, avoiding the risk of brake disc 240 rotation due to the failure of a single locking pin.

[0089] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0090] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0091] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A transmission characterized by, include: case; A low-speed shaft, rotatably mounted on the housing, is used to connect to the wind turbine rotor of the wind turbine generator; A high-speed shaft, rotatably mounted on the housing, is used to connect to the generator of the wind turbine. A speed change assembly, which is connected to the low-speed shaft and the high-speed shaft respectively, for adjusting the speed ratio between the low-speed shaft and the high-speed shaft; A brake disc, wherein the brake disc is sleeved on the high-speed shaft; A brake, connected to the housing, for contacting the brake disc to impede rotation of the brake disc through friction; as well as A locking assembly connected to the housing, the locking assembly being used to engage with the brake disc to limit the position of the brake disc in its circumferential direction; The brake and the locking assembly are separate from each other.

2. The transmission of claim 1, wherein, The locking component includes: Mounting base, the mounting base being connected to the housing; A first locking pin is disposed on the mounting base; The brake disc has an axially penetrating locking hole, and the first locking pin is detachably inserted into the locking hole.

3. The transmission according to claim 2, characterized in that, The mounting base includes: The fixing part is connected to the housing; A first mounting portion protrudes from the fixed portion and has a first mounting hole that extends through the axial direction. The second mounting part protrudes from the fixed part, and the first mounting part and the second mounting part are respectively disposed on both sides of the brake disc in the axial direction. The second mounting part has a second mounting hole that passes through the axial direction. The first locking pin is detachably inserted into the first mounting hole and the second mounting hole, respectively.

4. The transmission of claim 3, wherein, The first locking pin includes: The first segment is detachably inserted into the first mounting hole, the locking hole, and the second mounting hole; The second sub-segment is disposed at one end of the first sub-segment along the axial direction and protrudes from the first sub-segment in a direction perpendicular to the axial direction. The second sub-segment is used to abut against the first mounting portion along the axial direction.

5. The transmission according to claim 4, characterized in that, The first locking pin is a stepped shaft structure. The first sub-segment and the second sub-segment are two coaxial cylindrical segments, and the diameter of the second sub-segment is larger than the diameter of the first sub-segment, so that a shoulder is formed at the connection between the first sub-segment and the second sub-segment. The second sub-segment abuts against the first mounting part along the axial direction through the shoulder.

6. The transmission according to claim 3, characterized in that, The locking component also includes: A limiting member, which is detachably disposed on the first locking pin, is used to abut against the second mounting portion along the axial direction.

7. The transmission of claim 6 wherein, The limiting component includes: Main body; The limiting part is selectively positioned relative to the main body in a first state and a second state. In the first state, the limiting part and the main body form a closed annular structure. In the second state, a gap is formed between the limiting part and the main body. The first locking pin has a through hole and is sleeved on the limiting part through the through hole. The first locking pin can disengage from the limiting part through the notch. The main body and / or the limiting part are used to abut against the second mounting part along the axial direction.

8. The transmission of claim 2, wherein, The locking component also includes: A sensor, disposed on the mounting base, is used to detect whether the first locking pin is located at a predetermined position on the mounting base.

9. The transmission of claim 2, wherein, The first locking pin is a rotating body, and its central axis is parallel to the axial direction of the brake disc.

10. The transmission according to claim 2, characterized in that, The locking component also includes: The second locking pin is disposed on the mounting base and is spaced apart from the first locking pin in the circumferential direction of the brake disc; The number of locking holes is multiple, and the multiple locking holes are arranged at intervals in the circumference of the brake disc. The first locking pin is detachably inserted into one of the locking holes, and the second locking pin is detachably inserted into the other locking hole.

11. A wind driven electric power generator, characterised in that, The wind turbine includes: A wind turbine, which is used to rotate under the action of wind power; A generator for converting mechanical energy into electrical energy; A transmission, connected between the wind turbine and the generator, for transmitting power from the wind turbine to the generator, wherein the transmission is the transmission according to any one of claims 1-10.

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