Strength testing device for a wind turbine main shaft bearing

Abstract

This utility model discloses a strength testing device for wind turbine main shaft bearings, belonging to the field of wind turbine bearing testing technology. It includes a frame, a support platform fixed to the frame, and a pressure applying mechanism installed on the upper end of the frame. A hydraulic cylinder drives a connecting plate, and through the sequential linkage of rotating frames one, two, and three, ultimately drives a clamping plate to rotate and clamp the bearing on the support platform. The pressure applying mechanism includes a hydraulic cylinder two, a mounting frame, a rotating frame four, a housing, a limiting post, a slider, and a pressure plate. Hydraulic cylinder two drives the mounting frame, and rotating frame four drives the slider to slide along the limiting post fixed to the housing, causing the pressure plate to apply pressure to the bearing. This utility model achieves automatic clamping and pressure testing through two sets of hydraulically driven linkage mechanisms, solving the problems of cumbersome fixing operations and low automation in existing technologies. It achieves rapid and accurate positioning and efficient testing, with a high degree of structural integration.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine bearing testing technology, and in particular to a strength testing device for wind turbine main shaft bearings. Background Technology

[0002] Wind turbine main shaft bearings are key load-bearing components of wind turbine generator sets. They operate in harsh environments and bear huge and complex loads. Therefore, their strength, rigidity, and fatigue resistance are crucial to the overall safety and stable operation of wind turbine generator sets. To ensure the quality and reliability of the bearings, rigorous strength tests must be conducted on them after manufacturing and during subsequent maintenance. In the existing strength testing process, a necessary step is to firmly fix the main shaft bearing to be tested on the test platform. Due to the huge size and heavy weight of wind turbine main shaft bearings, traditional fixing methods often rely on manual use of large bolts, pressure plates, or other tooling for locking.

[0003] This manual or semi-automatic fixing method has obvious shortcomings: First, the operation process is cumbersome, time-consuming, labor-intensive, and has a high labor intensity; second, manual operation makes it difficult to ensure the positioning accuracy and clamping force consistency of each installation, resulting in deviations in test data; third, some existing clamping devices have complex structures, are inconvenient to cooperate with subsequent pressure mechanisms, have low automation, and seriously affect the overall testing efficiency.

[0004] Therefore, this utility model proposes a strength testing device for wind turbine main shaft bearings to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems existing in the strength testing device for wind turbine main shaft bearings, such as cumbersome and laborious operation when fixing the bearing, difficulty in ensuring the consistency of positioning accuracy and clamping force, low degree of automation, and low testing efficiency, this utility model aims to provide a wind turbine main shaft bearing strength testing device with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a strength testing device for wind turbine main shaft bearings, including: a frame, a bearing platform, a pressure applying mechanism; and a hydraulic cylinder, a connecting plate, a rotating frame, a rotating frame, a fixed frame, a rotating frame, a fixed frame, and a clamping plate.

[0007] The support platform is fixedly connected to the middle of the frame; the pressure applying mechanism is installed at the upper end of the frame and is located directly above the support platform.

[0008] Furthermore, hydraulic cylinder one is mounted on the frame; one end of the connecting plate is movably connected to the output end of hydraulic cylinder one; rotating frame one is rotatably connected to the frame and rotatably connected to the other end of the connecting plate; one end of rotating frame two is rotatably connected to rotating frame one; fixed frame one is fixed to the frame, and the middle part of rotating frame two is rotatably connected to fixed frame one; one end of rotating frame three is rotatably connected to the other end of rotating frame two; fixed frame two is fixed to the frame; clamping plate is rotatably connected to fixed frame two and rotatably connected to the other end of rotating frame three. This complete linkage mechanism is used to make the clamping plate move under the drive of hydraulic cylinder one, thereby clamping the bearing.

[0009] Preferably, the pressure applying mechanism includes a fixed base, a second hydraulic cylinder, a mounting frame, a fourth rotating frame, a housing, a limiting post, a slider, and a pressure plate. The fixed base is fixed to the upper end of the frame; the second hydraulic cylinder is mounted on the fixed base; the mounting frame is connected to the output end of the second hydraulic cylinder and is used for longitudinal movement under the drive of the second hydraulic cylinder; one end of the fourth rotating frame is rotatably connected to the mounting frame, and the other end is rotatably connected to the frame; the housing is fixed to the frame; the limiting post is fixed to the outer wall of the housing; one end of the slider is rotatably connected to the middle of the fourth rotating frame and slides against the outer wall of the limiting post; the pressure plate is fixedly connected to the other end of the slider.

[0010] Preferably, the output end of hydraulic cylinder one abuts against the connecting plate.

[0011] Preferably, the fixed frame one has a shaft hole for the rotating frame two to be rotatably mounted, providing stable rotational support for the rotating frame two.

[0012] Preferably, the fixing frame 2 and the card plate are rotatably connected by a pin, so that the card plate can rotate around the pin.

[0013] Preferably, the end of the piston rod of the second hydraulic cylinder is fixedly connected to the mounting bracket to directly drive the movement of the mounting bracket.

[0014] Preferably, the slider has a groove that matches the shape of the limiting post. The slider slides onto the limiting post through the groove, ensuring the guidance and stability of the slider's movement.

[0015] Preferably, the pressure plate is a pressure plate that can contact the outer ring of the bearing, used to apply test pressure to the bearing.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problems of manual operation, inaccurate positioning, uncontrollable clamping force, or complex structure in the prior art when fixing bearings by setting up a linkage clamping mechanism composed of a connecting plate driven by a hydraulic cylinder, a rotating frame one, a rotating frame two, a rotating frame three, and a clamping plate. It achieves the effects of automatic clamping, accurate positioning, reliable clamping, and ingenious structure.

[0017] 2. This utility model solves the problems of existing technologies, such as the separation of pressure testing function and clamping function, low degree of automation, and the need to transfer the bearing between different devices, by setting up a pressure application mechanism consisting of a mounting frame driven by a hydraulic cylinder, a rotating frame, a slider, and a pressure plate, and integrating it with the bearing clamping mechanism on the same frame. It achieves the technical effect of automatically performing pressure testing after one clamping, improving testing efficiency and automation level, and simplifying the operation process.

[0018] 3. This utility model uses two independent hydraulic drive linkage mechanisms to achieve clamping and pressure respectively, and cleverly utilizes the rotating frame and slider components to transmit motion, which solves the problems of large structure, complex transmission chain and difficult maintenance of traditional testing devices, making the overall structure more compact, the transmission clear, and the operation stable and reliable. Attached Figure Description

[0019] Figure 1 This is a front perspective view of a strength testing device for a wind turbine main shaft bearing proposed in this utility model. Figure 2 This is a partial structural breakdown diagram of the support platform of the strength testing device for wind turbine main shaft bearings proposed in this utility model; Figure 3 This invention presents a partial structural diagram of the rotating frame of a strength testing device for wind turbine main shaft bearings.

[0020] Legend: 1. Frame; 2. Pressure applying mechanism; 201. Outer shell; 202. Limiting post; 203. Slider; 204. Rotating frame four; 205. Mounting frame; 206. Pressure plate; 207. Fixed seat; 208. Hydraulic cylinder two; 3. Hydraulic cylinder one; 4. Connecting plate; 5. Rotating frame one; 6. Rotating frame two; 7. Fixed frame one; 8. Rotating frame three; 9. Support platform; 10. Fixed frame two; 11. Clamping plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figures 1 to 3This utility model provides a strength testing device for wind turbine main shaft bearings. The strength testing device for wind turbine main shaft bearings includes a frame 1 and a support platform 9 fixedly connected to the middle of the frame 1. The frame 1 serves as the mounting base for the entire device, and the support platform 9 is used to place the bearing to be tested. A pressure applying mechanism 2 is installed at the upper end of the frame 1. The pressure applying mechanism 2 is located directly above the support platform 9 and is used to apply pressure to the bearing placed on the support platform 9.

[0023] To achieve automatic clamping of the bearing, the device also includes a clamping mechanism consisting of multiple interconnected components. Specifically, a hydraulic cylinder 3 is mounted on the frame 1. The output end of the hydraulic cylinder 3 is movably connected to one end of a connecting plate 4. The other end of the connecting plate 4 is rotatably connected to a rotating frame 5. The rotating frame 5 is rotatably connected to the frame 1, and its other end is also rotatably connected to one end of a rotating frame 6. The middle part of the rotating frame 6 is rotatably connected to a fixed frame 7 fixed to the frame 1. The other end of the rotating frame 6 is rotatably connected to one end of a rotating frame 8. The other end of the rotating frame 8 is rotatably connected to a clamping plate 11. The clamping plate 11 is rotatably connected to a fixed frame 10 fixed to the frame 1. By driving the linkage of this series of linkage mechanisms through the hydraulic cylinder 3, the clamping plate 11 is finally rotated and clamped on the bearing placed on the support platform 9.

[0024] Hydraulic cylinder 3 serves as the power source for clamping action. Its output end abuts against the connecting plate 4 and pushes the entire mechanism to move through extension and retraction. The connecting plate 4 serves as a transmission link, converting the linear motion output by hydraulic cylinder 3 into the rotational motion of rotating frame 5. Rotating frame 5 is a linkage member, with one end rotatably connected to the connecting plate 4 and the other end rotatably connected to rotating frame 6. It itself rotates around frame 1 as the fulcrum. Fixed frame 7 is fixed on frame 1, and has a shaft hole for rotating frame 2 6 to be rotatably installed. Rotating frame 2 6 uses fixed frame 7 as the fulcrum for rotation, thereby stably transmitting the motion of rotating frame 5 to rotating frame 3 8. Rotating frame 3 8 is connected between rotating frame 2 6 and clamping plate 11, and is responsible for transmitting rotational action. Fixed frame 2 10 provides a rotation fulcrum for clamping plate 11. Clamping plate 11 and fixed frame 2 10 are rotatably connected by a pin. Under the push of rotating frame 3 8, clamping plate 11 will rotate around the pin, thereby realizing the clamping or loosening action of bearing.

[0025] To solve the above-mentioned technical problems, the technical solution of this embodiment is that the strength testing device for wind turbine main shaft bearings further includes a pressure applying mechanism 2, and the pressure applying mechanism 2 forms a specific structural fit and connection relationship with the aforementioned frame 1 and bearing platform 9 to realize the pressure test of the bearing.

[0026] Please refer to Figure 1 and Figure 3The pressure applying mechanism 2 includes a fixed seat 207, which is fixed to the upper end of the frame 1. A hydraulic cylinder 208 is mounted on the fixed seat 207. The end of the piston rod of the hydraulic cylinder 208 is fixedly connected to the mounting frame 205. The mounting frame 205 is used to move longitudinally under the drive of the hydraulic cylinder 208. One end of the rotating frame 204 is rotatably connected to the mounting frame 205. The other end of the rotating frame 204 is rotatably connected to the frame 1. The pressure applying mechanism 2 also includes a housing 201 fixed to the frame 1. A limit post 202 is fixed on the outer wall of the housing 201. One end of the slider 203 is rotatably connected to the middle of the rotating frame 204. The slider 203 has a groove that matches the shape of the limit post 202. The slider 203 slides on the limit post 202 through the groove, thereby slidingly engaging with the outer wall of the limit post 202. A pressure plate 206 is fixedly connected to the other end of the slider 203. The pressure plate 206 is a pressure plate that can contact the outer ring of the bearing. It is used to move downward under the drive of the slider 203 and apply pressure to the bearing.

[0027] In a preferred embodiment, the output end of the hydraulic cylinder 3 abuts against the connecting plate 4.

[0028] As another preferred embodiment, the fixed frame 7 is provided with a shaft hole for the rotating frame 6 to be rotatably mounted.

[0029] In another preferred embodiment, the fixing frame 10 and the card plate 11 are rotatably connected by a pin.

[0030] In another preferred embodiment, the end of the piston rod of the hydraulic cylinder 208 is fixedly connected to the mounting bracket 205.

[0031] As another preferred embodiment, the slider 203 is provided with a groove that matches the shape of the limiting post 202, and the slider 203 is slidably sleeved on the limiting post 202 through the groove.

[0032] As another preferred embodiment, the pressure plate 206 is a pressure plate that can contact the outer ring of the bearing.

[0033] Working principle: The hydraulic cylinder 3 pushes the mechanism to finally clamp the bearing with the clamping plate 11, thus fixing the bearing. The output of the hydraulic cylinder 3 pushes the connecting plate 4. The moving connecting plate 4 drives the rotating frame 5 to rotate. The rotation of the rotating frame 5 drives the rotating frame 6 to rotate. The rotation of the rotating frame 6 drives the rotating frame 8 to rotate. The fixed frame 7 is used to install and cooperate with the rotation of the rotating frame 6. The bearing platform 9 is used to place the bearing. The fixed frame 10 is used to cooperate with the rotating frame 8 to drive the clamping plate 11 to rotate. The upper end of the frame 1 is provided with a pressure mechanism 2, which is used to test the bearing strength. The hydraulic cylinder 208 is activated, which drives the mounting bracket 205 to move longitudinally. The longitudinal movement of the mounting bracket 205 drives the rotating bracket 204 to rotate. The rotation of the rotating bracket 204 causes the slider 203 to slide on the outer wall of the limiting post 202 fixed on the outer wall of the outer shell 201. The slider 203 slides and the pressure plate 206 locks the bearing. The fatigue strength is tested by continuous pressure or repeated periodic impact. The fixed seat 207 is used to install the hydraulic cylinder 208.

Claims

1. A strength testing device for a windmill main shaft bearing, comprising: Frame (1); support platform (9), fixedly connected to the middle of the frame (1); pressure application mechanism (2), installed at the upper end of the frame (1) and located directly above the support platform (9), for applying pressure to the bearing placed on the support platform (9); The device is characterized in that it further includes: a hydraulic cylinder (3) mounted on the frame (1); A connecting plate (4) is movably connected at one end to the output end of the hydraulic cylinder (3). A rotating frame (5) is rotatably connected to the frame (1) and rotatably connected to the other end of the connecting plate (4). A rotating frame (6) is rotatably connected at one end to the rotating frame (5). A fixed frame (7) is fixed to the frame (1). The middle part of the rotating frame (6) is rotatably connected to the fixed frame (7). Rotating frame three (8), one end of which is rotatably connected to the other end of rotating frame two (6), fixed frame two (10), fixed on the frame (1), clamping plate (11), rotatably connected to the fixed frame two (10), and rotatably connected to the other end of rotating frame three (8), the clamping plate (11) is used to clamp the bearing under the drive of the hydraulic cylinder one (3).

2. The strength testing device of a windmill spindle bearing according to claim 1, wherein The pressure applying mechanism (2) includes: a fixed base (207) fixed to the upper end of the frame (1); Hydraulic cylinder two (208) is mounted on the fixed base (207); The mounting bracket (205) is connected to the output end of the second hydraulic cylinder (208) and is used to move longitudinally under the drive of the second hydraulic cylinder (208); Rotating frame four (204), one end of which is rotatably connected to the mounting frame (205) and the other end of which is rotatably connected to the frame (1), outer shell (201), fixed to the frame (1), and limiting post (202), fixed to the outer wall of the outer shell (201); The slider (203) is rotatably connected at one end to the middle of the rotating frame (204) and slidably fitted to the outer wall of the limiting post (202); The pressure plate (206) is fixedly connected to the other end of the slider (203).

3. The strength testing device of a windmill spindle bearing according to claim 1, wherein The output end of the hydraulic cylinder (3) abuts against the connecting plate (4).

4. The strength testing device of a windmill spindle bearing according to claim 1, wherein The fixed frame one (7) has a shaft hole for the rotating frame two (6) to be rotatably installed.

5. The strength testing device of a windmill spindle bearing according to claim 1, wherein The second fixing frame (10) and the card plate (11) are rotatably connected by a pin.

6. The strength testing device of a windmill spindle bearing according to claim 2, wherein The end of the piston rod of the second hydraulic cylinder (208) is fixedly connected to the mounting bracket (205).

7. The strength testing device of a windmill spindle bearing according to claim 2, wherein The slider (203) has a groove that matches the shape of the limiting post (202), and the slider (203) slides on the limiting post (202) through the groove.

8. The strength testing device of a windmill spindle bearing according to claim 2, wherein The pressure plate (206) is a pressure plate that can contact the outer ring of the bearing.

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