Wind turbine gearbox with impact protection structure

Abstract

The utility model relates to the technical field of wind power equipment manufacturing technique discloses a wind power gear box with impact protection structure, including main part assembly, including gear box, the main shaft is inserted in gear box inner wall, buffer assembly is set up on the main shaft, including buffer piece, and the buffer piece includes the shock absorber fixed on the gear box, the inner wall of shock absorber is provided with piston rod, and the one end of piston rod is fixed with the pressing plate, and the one end of pressing plate is fixed with the sliding block. The utility model has the beneficial effect that: the structure that possesses the buffer anti -impact effect and the buffer progress that can adjust is added between planetary axle and main shaft, can weaken the direct action of impact load to gear meshing surface, shafting component and bearing through buffer energy absorption, reduces the invalidation risk such as tooth surface wear, resonance fracture and prolongs the life of transmission system.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment manufacturing technology, and in particular to a wind power gearbox with an impact protection structure. Background Technology

[0002] During the operation of a wind turbine generator set, the natural speed of the wind turbine is much lower than the rated speed required by the generator to generate electricity. The speed adjustment is achieved by the wind turbine gearbox to ensure that the generator outputs electrical energy that meets the requirements. As the core transmission component of the unit, the wind turbine gearbox plays a key supporting role in the stable operation of the entire wind power equipment. The wind turbine and blades are deployed in a high-altitude environment, and the airflow at high altitudes has significant instability. When the airflow direction changes abruptly, it will create impact loads on the blades and wind turbine. If the impact load reaches a certain intensity, it will directly cause damage to the internal components of the gearbox, thereby seriously shortening the overall service life of the equipment.

[0003] The wind force from the fan blades acts directly on the main shaft, which is directly connected to the planetary shaft. When subjected to gusts, grid fluctuations, or the impact of the unit's start-up and shutdown, the lack of a buffer energy absorption mechanism means that the impact load is directly transmitted to the gear meshing surface and shaft components. This can easily lead to fatigue wear of the gear teeth, shaft resonance, or even fracture failure, exacerbate impact damage to bearings and other auxiliary components, shorten the service life of the overall transmission system, reduce transmission accuracy, increase operating noise and vibration, and increase the frequency and cost of unit maintenance. In severe cases, it can even affect the safe and stable operation of the wind turbine generator. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above and / or existing wind turbine gearboxes with impact protection structures, this utility model is proposed.

[0006] Therefore, the problem that this invention aims to solve is the lack of a buffering effect.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a wind turbine gearbox with an impact protection structure, comprising a main body assembly including a gearbox, wherein a main shaft is inserted into the inner wall of the gearbox;

[0008] A buffer assembly, disposed on the main shaft, includes a buffer component, the buffer component including a shock absorber fixed to the gearbox, a piston rod disposed on the inner wall of the shock absorber, a pressure plate fixed to one end of the piston rod, and a slider fixed to one end of the pressure plate.

[0009] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, the buffer assembly further includes a support member, which includes a slide rail sleeved on the outside of the slider, and the slide rail is sleeved on the main shaft.

[0010] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, the inner wall of the slide rail is provided with multiple slots, and the inner wall of the slots is provided with locking blocks.

[0011] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, one end of the locking block is fixed with a spring, and one end of the spring is fixed to the inner wall of the slider.

[0012] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, the inner wall of the card block is provided with an extrusion groove.

[0013] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, the buffer assembly further includes a release component, which includes a compression rod disposed in the compression groove.

[0014] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, the inner wall of the extrusion rod is provided with a fixing groove, and the outer side of the extrusion rod is fitted with a movable frame.

[0015] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, a locking rod is provided on the fixing groove.

[0016] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, wherein: a telescopic rod is fixed on the shock absorber, and a straight plate is fixed at one end of the telescopic rod.

[0017] As a preferred embodiment of the wind turbine gearbox with impact protection structure described in this utility model, wherein: a wedge block is fixed at one end of the gearbox.

[0018] The beneficial effects of this utility model are as follows: by adding a structure with buffering and shock-resistant effect and adjustable buffering progress between the planetary shaft and the main shaft, the impact load can be reduced to weaken the direct effect of the impact load on the gear meshing surface, shaft components and bearings through buffering and energy absorption, thereby reducing the risk of failure such as tooth surface wear and resonance fracture and extending the service life of the transmission system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is an overall structural diagram of a wind turbine gearbox with impact protection.

[0021] Figure 2 This is a structural diagram of a shock absorber for a wind turbine gearbox with impact protection.

[0022] Figure 3 For wind turbine gearboxes with impact protection structure Figure 2 Enlarged view of the structure at point A in the middle.

[0023] Figure 4 This is a diagram of a straight plate structure for a wind turbine gearbox with impact protection.

[0024] Figure 5 This is a diagram of the spring structure of a wind turbine gearbox with impact protection.

[0025] In the diagram: 1 Main component; 11 Gearbox; 12 Main shaft; 2 Buffer assembly; 21 Buffer component; 211 Shock absorber; 212 Piston rod; 213 Pressure plate; 214 Slider; 22 Support component; 221 Slide rail; 221-1 Slot; 222 Slot block; 223 Spring; 222-1 Extrusion groove; 23 Release component; 231 Extrusion rod; 231-1 Fixing groove; 232 Moving frame; 233 Engaging rod; 234 Telescopic rod; 235 Straight plate; 236 Inclined block. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1

[0030] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a wind turbine gearbox with an impact protection structure. The wind turbine gearbox with an impact protection structure includes a main body component 1 and a buffer component 2. The two components work together to reduce torsional fatigue of the main shaft 12 and the planetary shaft and increase the buffering and impact resistance effect.

[0031] The main component 1 includes a gearbox 11, and a main shaft 12 is inserted into the inner wall of the gearbox 11.

[0032] The inner wall of the wind turbine gearbox 11 is provided with planetary gears, and planetary shafts are inserted into the inner wall of the planetary gears. The main shaft 12 is inserted into the planetary shafts.

[0033] The wind turbine gearbox 11 is the core transmission component of the wind turbine. Its function is to transfer the low-speed, high-torque mechanical energy generated by the wind turbine after capturing wind energy to the generator through gear meshing to increase speed and torque, or through direct drive models without speed increase, converting it into high-speed mechanical energy that meets the generator's power generation requirements. At the same time, it bears and buffers the impact of sudden changes in wind load, ensuring the stable operation of the power generation system. The main shaft 12 inserted into the inner wall of the gearbox 11 is mainly used to support the blades. The wind acts on the blades to form aerodynamic thrust, which drives the blades to rotate around the axis of the main shaft 12. The blades are rigidly connected to the main shaft 12 through the hub or indirectly connected through the pitch bearing. The rotational torque of the blades is directly transmitted to the main shaft 12, driving the main shaft 12 to rotate synchronously. The rotation of the main shaft 12 will then drive the planetary shaft on the inner wall of the gearbox 11 to rotate.

[0034] This is existing technology, and this solution will not be described in detail. Moreover, those skilled in the art can clearly understand its working principle.

[0035] The buffer assembly 2 is mounted on the main shaft 12 and includes a buffer component 21. The buffer component 21 includes a shock absorber 211 fixed to the gearbox 11. A piston rod 212 is provided on the inner wall of the shock absorber 211. A pressure plate 213 is fixed to one end of the piston rod 212 and a slider 214 is fixed to one end of the pressure plate 213.

[0036] The piston rod 212 drives the piston to reciprocate within the cylinder of the shock absorber 211, forcing the oil to be throttled through the damping valve assembly to generate damping force, converting the impact kinetic energy into heat energy for dissipation, thus achieving buffering.

[0037] When the main shaft 12 rotates, it drives the slider 214 to rotate synchronously. During the rotation of the slider 214, it forms a periodic squeezing action on the pressure plate 213. After being squeezed, the pressure plate 213 generates axial displacement, which drives the piston rod 212 to move along the inner wall of the shock absorber 211, thereby driving the shock absorber 211 to rotate as a whole. The rotational torque of the shock absorber 211 is transmitted to the planetary shaft, which drives the planetary shaft to rotate synchronously. The dual paths convert kinetic energy into heat energy and disperse the load, thereby achieving buffering and attenuation.

[0038] Example 2

[0039] Reference Figures 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0040] Specifically, the buffer assembly 2 also includes a support member 22, which includes a slide rail 221 sleeved on the outside of the slider 214 and the slide rail 221 sleeved on the main shaft 12.

[0041] The rotation of the main shaft 12 drives the slide rail 221 to rotate, and the rotation of the slide rail 221 drives the slider 214 to rotate synchronously.

[0042] Specifically, the inner wall of the slide rail 221 is provided with multiple slots 221-1, and the inner wall of the slots 221-1 is provided with a block 222.

[0043] In the initial state, the locking block 222 engages with the slot 221-1. The rotation of the main shaft 12 drives the slide rail 221 to rotate. The rotation of the slide rail 221 causes the slot 221-1 to squeeze the locking block 222, which in turn causes the slider 214 to rotate synchronously.

[0044] When the slider 214 moves close to the shock absorber 211, the locking block 222 will separate from the locking groove 221-1, allowing the slider 214 to slide on the inner wall of the slide rail 221. This releases some pressure from the piston rod 212, preventing structural damage to the shock absorber 211 caused by continuous overload compression. At the same time, the pressure release achieves flexible buffering, improving the stability of impact protection and the service life of the components.

[0045] Specifically, one end of the locking block 222 is fixed with a spring 223, and the other end of the spring 223 is fixed to the inner wall of the slider 214.

[0046] The spring force of the spring 223 will cause the locking block 222 to continuously engage with the slot 221-1, so when the slide rail 221 rotates, it will drive the locking block 222 to rotate synchronously.

[0047] Specifically, the inner wall of the card block 222 is provided with an extrusion groove 222-1.

[0048] When the slider 214 moves close to the shock absorber 211, the compression rod 231 will compress the compression groove 222-1. At this time, the locking block 222 will compress the spring 223 and separate from the locking groove 221-1, so that the slider 214 can slide on the inner wall of the slide rail 221, allowing the piston rod 212 to release some pressure.

[0049] Example 3

[0050] Reference Figure 4 and Figure 5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0051] Specifically, the buffer assembly 2 also includes a release member 23, which includes a compression rod 231 disposed in the compression groove 222-1.

[0052] When the slider 214 moves to the position near the shock absorber 211, the extrusion rod 231 exerts an extrusion force on the extrusion groove 222-1, driving the locking block 222 to compress the spring 223 and disengage from the locking groove 221-1; after the locking block 222 disengages, the slider 214 can slide freely along the inner wall of the slide rail 221, thereby enabling the piston rod 212 to release pressure.

[0053] Specifically, a fixing groove 231-1 is provided on the inner wall of the extrusion rod 231, and a movable frame 232 is sleeved on the outer side of the extrusion rod 231.

[0054] The movable frame 232 is provided with an elastic piece. When the movable frame 232 rotates, it will come into contact with the inclined block 236 and be squeezed by the inclined block 236. The displacement of the movable frame 232 will slide on the outside of the squeezing rod 231. The elastic piece will drive the movable frame 232 to keep parallel to the fixed groove 231-1, so that the locking rod 233 can be easily inserted into the inner wall of the fixed groove 231-1.

[0055] When the slider 214 does not drive the locking rod 233 to contact the straight plate 235, the locking rod 233 and slider 214 are located on the inner wall of the slider 214 and do not contact the moving frame 232 and the fixing groove 231-1.

[0056] The rotation of slider 214 drives the pressing rod 231 and the moving frame 232 to rotate synchronously. The rotation of slider 214 drives the locking rod 233 to move. After the locking rod 233 moves to the side of the straight plate 235, it will be pressed, and the straight plate 235 will also move. The movement of the straight plate 235 drives the telescopic rod 234 to extend and retract, providing displacement buffer and automatic reset function for the straight plate 235. At this time, the locking rod 233 will engage with the fixing groove 231-1, thereby connecting the moving frame 232 and the pressing rod 231. Then, the continuous rotation of the main shaft 12 will drive the moving frame 232 to move. The moving frame 232 contacts the inclined block 236, and the inclined block 236 squeezes the moving frame 232. The movement of the moving frame 232 will drive the pressing rod 231 to move through the locking rod 233. The pressing rod 231 moves and squeezes the pressing groove 222-1, causing the locking block 222 to separate from the groove 221-1. This causes the slider 214 to drive the piston rod 212 to release pressure. At this time, the slider 214 will move away from the shock absorber 211, which will drive the locking rod 233 to separate from the straight plate 235. At this time, the locking rod 233 will return to its original position through the elastic washer.

[0057] Specifically, a locking rod 233 is provided on the fixing groove 231-1.

[0058] An elastic washer is fitted on the outside of the locking rod 233, with one end fixed inside the moving frame 232 and the other end fixed to the surface of the locking rod 233.

[0059] When the slider 214 rotates, it drives the pressing rod 231 to rotate synchronously with the moving frame 232, and at the same time drives the locking rod 233 to move. When the locking rod 233 moves to the side of the straight plate 235, it is pressed by it, pushing the straight plate 235 to move and driving the telescopic rod 234 to extend and retract. The telescopic rod 234 provides displacement buffer and automatic reset function for the straight plate 235. At this time, the locking rod 233 engages with the fixed groove 231-1, realizing the connection between the moving frame 232 and the pressing rod 231.

[0060] As the slider 214 moves away from the shock absorber 211, it causes the locking rod 233 to separate from the straight plate 235. The locking rod 233 returns to its initial position with the help of the elastic force of the elastic washer.

[0061] Specifically, a telescopic rod 234 is fixed on the shock absorber 211, and a straight plate 235 is fixed to one end of the telescopic rod 234.

[0062] When the locking rod 233 moves to one side of the straight plate 235, it is squeezed by it, which pushes the straight plate 235 to move and drives the telescopic rod 234 to extend and retract. The telescopic rod 234 provides displacement buffer and automatic reset function for the straight plate 235.

[0063] Specifically, a wedge block 236 is fixed at one end of the gearbox 11.

[0064] The main shaft 12 rotates continuously, causing the moving frame 232 to contact the inclined block 236. The inclined block 236 squeezes the moving frame 232. The displacement of the moving frame 232 drives the extrusion rod 231 to move through the locking rod 233. After the extrusion rod 231 moves, it exerts a squeezing effect on the extrusion groove 222-1, causing the locking block 222 to disengage from the locking groove 221-1, thereby causing the slider 214 to drive the piston rod 212 to release pressure.

[0065] When the slider 214 releases pressure, it slides outside the slide rail 221. At this time, because the extrusion rod 231 returns to its original position, the extrusion rod 231 returns to its original position and separates from the extrusion groove 222-1. At this time, the force of the spring 223 rebounding causes the locking block 222 to engage with the next locking groove 221-1.

[0066] In use, the rotation of the main shaft 12 drives the slider 214 to rotate synchronously. The slider 214 forms periodic compression on the pressure plate 213. The pressure plate 213 is compressed and generates axial displacement, which drives the piston rod 212 to move along the inner wall of the shock absorber 211. The piston at the end of the piston rod 212 forces the oil in the shock absorber 211 to be throttled through the damping valve group, converting the impact kinetic energy into heat energy for dissipation, forming hydraulic damping buffer. The movement of the piston rod 212 drives the shock absorber 211 to rotate as a whole. Its torque is transmitted to the planetary shaft and drives the planetary shaft to rotate synchronously. Impact attenuation is achieved through the dual path of "hydraulic damping + planetary gear load distribution".

[0067] The rotation of the main shaft 12 drives the slide rail 221 to rotate, the slot 221-1 presses against the locking block 222, and drives the slider 214 to rotate synchronously with the slide rail 221. When the slider 214 moves to the position near the shock absorber 211, the pressure needs to be released. The movement of the slider 214 drives the pressing rod 231 and the moving frame 232 to rotate synchronously, and at the same time drives the locking rod 233 to move. When the locking rod 233 moves to the side of the straight plate 235, it is pressed, pushing the straight plate 235 to move and driving the telescopic rod 234 to extend and retract. The locking rod 233 engages with the fixing groove 231-1 on the inner wall of the pressing rod 231, realizing the connection between the moving frame 232 and the pressing rod 231. After the pressing rod 231 moves, it presses against the locking block 222. The extrusion groove 222-1 on the inner wall of 22 forces the locking block 222 to separate from the slot 221-1. The slider 214 slides along the slide rail 221. At this time, the piston rod 212 will release pressure to avoid the shock absorber 211 from sealing failure and piston rod 212 wear due to continuous overload extrusion. The slider 214 moves and drives the locking rod 233 to separate from the straight plate 235. With the help of the elastic washer, it returns to the initial position. After the extrusion rod 231 is reset, it disengages from the extrusion groove 222-1. The spring 223 rebounds and drives the locking block 222 to engage with the next slot 221-1, completing one buffer cycle. This reduces the torsional fatigue of the main shaft 12 and planetary shaft and significantly extends the service life of key components of the gearbox.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A wind turbine gearbox with an impact protection structure, characterized in that: include, The main component (1) includes a gearbox (11) with a main shaft (12) inserted into the inner wall of the gearbox (11). The buffer assembly (2) is disposed on the main shaft (12) and includes a buffer component (21). The buffer component (21) includes a shock absorber (211) fixed on the gearbox (11). A piston rod (212) is disposed on the inner wall of the shock absorber (211). A pressure plate (213) is fixed at one end of the piston rod (212), and a slider (214) is fixed at one end of the pressure plate (213).

2. The wind turbine gearbox with impact protection structure as described in claim 1, characterized in that: The buffer assembly (2) further includes a support member (22), which includes a slide rail (221) sleeved on the outside of the slider (214) and the slide rail (221) sleeved on the main shaft (12).

3. The wind turbine gearbox with impact protection structure as described in claim 2, characterized in that: The inner wall of the slide rail (221) is provided with multiple slots (221-1), and the inner wall of the slots (221-1) is provided with a block (222).

4. The wind turbine gearbox with impact protection structure as described in claim 3, characterized in that: One end of the card block (222) is fixed with a spring (223), and one end of the spring (223) is fixed to the inner wall of the slider (214).

5. The wind turbine gearbox with impact protection structure as described in claim 4, characterized in that: The inner wall of the card block (222) is provided with a compression groove (222-1).

6. The wind turbine gearbox with impact protection structure as described in claim 5, characterized in that: The buffer assembly (2) further includes a release member (23), which includes a compression rod (231) disposed in the compression groove (222-1).

7. The wind turbine gearbox with impact protection structure as described in claim 6, characterized in that: The inner wall of the extrusion rod (231) is provided with a fixing groove (231-1), and a moving frame (232) is sleeved on the outer side of the extrusion rod (231).

8. The wind turbine gearbox with impact protection structure as described in claim 7, characterized in that: A locking rod (233) is provided on the fixing groove (231-1).

9. The wind turbine gearbox with impact protection structure as described in claim 8, characterized in that: A telescopic rod (234) is fixed on the shock absorber (211), and a straight plate (235) is fixed to one end of the telescopic rod (234).

10. The wind turbine gearbox with impact protection structure as described in claim 9, characterized in that: One end of the gearbox (11) is fixed with a wedge block (236).

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