Resetting tool for elastic supporting shaft of wind power gear box

Abstract

The utility model discloses a kind of reset tool of wind power gear box elastic support shaft, belong to wind power technical field, including mutually parallel pull plate and top plate, the top plate is connected with pull plate by at least two opposite tensioning screw rods, the side of top plate towards pull plate is equipped with jack, the working end of jack is abutted with top plate, the base of jack is equipped with sleeve, the sleeve one end is closed and the base of jack is detachably connected with closed end. The beneficial effects of the present application are: the working end of jack pushes the top plate, the sleeve provides support for the base of jack, the top plate pulls the pull plate, and the pull plate slowly resets the elastic support shaft. The problem of narrow space of wind turbine nacelle, inconvenient installation of jack and lack of stress point is solved, which can be used in narrow space, has simple structure and is easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of wind power technology, specifically to a reset tool for the elastic support shaft of a wind turbine gearbox. Background Technology

[0002] In the field of wind power generation, the gearbox of a wind turbine is installed in the nacelle and transmits power between the rotor and the generator. Due to the force transmitted by the rotor rotation, the gearbox is in a working state of alternating load impact for a long time, and the failure and wear rate of mechanical parts is relatively high. Therefore, it needs elastic support to reduce vibration.

[0003] The flexible support shaft is a component used to provide vibration damping support for wind turbine gearboxes. It has an interference fit with the gearbox housing's torque arm shaft hole and, together with the flexible support seat, reduces vibration and impact during gearbox transmission, thereby minimizing damage to the mechanical equipment. However, during actual gearbox operation, the flexible support shaft often protrudes towards the motor end. In the current wind turbine nacelle environment, the space is relatively narrow, making it difficult to reposition the flexible support shaft. If the gearbox needs to be removed from the tower for repair due to the flexible support shaft protruding, it will result in significant economic losses. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to quickly reset the elastic support shaft in the environment of wind turbine nacelle.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a reset fixture for a wind turbine gearbox elastic support shaft, comprising a pull plate and a top plate that are parallel to each other, the top plate being connected to the pull plate by at least two tie rods, a jack being provided on the side of the top plate facing the pull plate, the working end of the jack abutting against the top plate, and a sleeve being provided on the base of the jack, one end of the sleeve being closed and the closed end being detachably connected to the base of the jack.

[0006] The beneficial effects of this solution are as follows: the working end of the jack pushes the top plate, the sleeve provides support for the jack base, the top plate pulls the pull plate, and the pull plate slowly resets the elastic support shaft; it solves the problems of narrow space in the wind turbine nacelle, inconvenient jack installation, and lack of force points, and can be used in narrow spaces. The structure is simple and easy to operate.

[0007] Preferably, the pull screw is a double-ended screw, and the pull plate and the top plate are both clearance-fitted with the double-ended screw; both ends of the double-ended screw are threaded with limit nuts.

[0008] The advantages of adopting the above preferred solution are: the initial relative distance between the pull plate and the top plate can be adjusted by the limiting nut, which is suitable for elastic support shafts of different lengths and has a wider range of applications.

[0009] Preferably, there are six tie rods, all located near the edges of the pull plate and the top plate, and evenly distributed around the sleeve.

[0010] The advantages of adopting the above preferred solution are: forming a stable and uniform stress structure, preventing the elastic support shaft from being eccentric during reset, resulting in wear or tear on the outer wall.

[0011] Preferably, the sleeve length is greater than or equal to the maximum extension length of the jack.

[0012] The advantage of adopting the above-mentioned preferred solution is that it ensures that the elastic support shaft has sufficient space for reset movement when the jack is extended.

[0013] Preferably, a sealing plate is fixedly provided at one end of the sleeve facing the base of the jack.

[0014] The beneficial effect of adopting the above preferred solution is that the sealing plate increases the contact area between the end face of the sleeve and the base of the jack, thereby reducing the pressure. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the resetting fixture of this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the repositioned and fixed state of this utility model;

[0017] Appendix Figure 3 This is a schematic diagram of the elastic support base of this utility model;

[0018] Appendix Figure 4 This is a schematic diagram of the torque arm of this utility model;

[0019] Appendix Figure 5 This is a schematic diagram of Embodiment 2 of the present invention.

[0020] Explanation of reference numerals in the attached diagram: 1. Elastic support shaft; 2. Pull plate; 3. Jack; 4. Sleeve; 5. Torque arm; 6. Top plate; 7. Tie rod; 8. Elastic support seat; 9. Steel shock-absorbing bearing; 10. Fixing plate one; 11. Fixing plate two; 12. Elastic support bolt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] Example 1

[0023] like Figure 1 As shown, a reset fixture for a wind turbine gearbox elastic support shaft includes a pull plate 2 and a top plate 6 that are parallel to each other. The top plate 6 is connected to the pull plate 2 by at least two tie rods 7. A jack 3 is provided on the side of the top plate 6 facing the pull plate 2. The working end of the jack 3 abuts against the top plate 6. The base of the jack 3 is provided with a sleeve 4. One end of the sleeve 4 is closed and the closed end is detachably connected to the base of the jack 3.

[0024] In this embodiment, the gearbox is placed inside the nacelle of the wind turbine. The input shaft of the gearbox is connected to the impeller, and the output shaft is connected to the rotor of the generator. When the wind drives the impeller to rotate, the impeller adjusts its speed, transmits torque and power through the gearbox, and drives the rotor of the generator to rotate to generate electricity.

[0025] like Figure 3 and Figure 4 As shown, the gearbox operates under alternating load impacts for extended periods, making rigid screw connections unsuitable; therefore, flexible installation is required. Torque arms 5 are located on both sides of the gearbox. These two torque arms 5 are used to withstand reverse torque and dampen vibrations. Flexible support shafts 1 are horizontally mounted on each of the two torque arms 5, with an interference fit between the flexible support shafts 1 and the torque arms 5. The flexible support shafts 1 are held at both ends by two flexible support seats 8. Steel damping bearings 9 are installed inside the flexible support seats 8 to counteract vibrations. The flexible support seats 8 are fixedly installed inside the wind turbine nacelle using flexible support bolts 12.

[0026] When the elastic support shaft 1 moves out of the hole in the torque arm 5 toward the generator side; if both elastic support shafts 1 need to be reset, first use a pad to lift one side of the torque arm 5, remove the elastic support seat 8, remove its elastic support bolt 12 and place it aside, remove the elastic support seat 8 and the steel shock-absorbing bearing 9, leaving space for the installation of the reset tool, and the other side of the elastic support shaft 1 should be kept fixed and should not be disassembled.

[0027] like Figure 1 As shown, sleeve 4 is placed on the side of the elastic support shaft 1 that needs to be reset. The inner diameter of sleeve 4 is larger than the diameter of elastic support shaft 1, and the length of sleeve 4 is greater than half of elastic support shaft 1. One end of sleeve 4 abuts against the side wall of torque arm 5, and the other end abuts against the base of jack 3. The central axis of jack 3 is coaxial with elastic support shaft 1. Pull plate 2 and top plate 6 are located at both ends of elastic support shaft 1 and connected by tie rod 7. Pull plate 2 abuts against the end face of the end of elastic support shaft 1 that protrudes, and top plate 6 abuts against the working end of jack 3.

[0028] Finally, start jack 3. The working end of jack 3 pushes the top plate 6, and the sleeve 4 provides support for the base of jack 3. The top plate 6 pulls the pull plate 2, and the pull plate 2 slowly resets the elastic support shaft 1 in the direction of jack 3. Pay attention to the reset installation dimensions of the shaft to ensure that the dimensions at both ends are consistent; at the same time, be careful not to press too hard to prevent wear or damage.

[0029] Then reset the other side elastic support shaft 1 using the same steps.

[0030] This embodiment is mainly applied to the side where the elastic support shaft 1 extends outward (i.e., Figure 1 In cases where there is insufficient installation space on the side where the middle pull plate 2 is located.

[0031] In addition to this embodiment, there is also a fixing fixture:

[0032] like Figure 2 As shown, after the elastic support shaft 1 is reset; since each elastic support seat 8 is itself composed of two halves, the lower half is first placed in the installation position, the elastic support bolt 12 is inserted for positioning, and its position is adjusted; so that the gap between the side wall of the two lower halves facing the torque arm 5 and the side wall of the torque arm 5 is consistent.

[0033] Then, install the new steel shock-absorbing bearing 9. The steel shock-absorbing bearing 9 itself consists of multiple half-bearings on the upper and lower sides. Place the lower half-bearing on the lower half-seat and adjust it to be flush with the lower half-seat. Then remove the pad block so that the elastic support shaft 1 descends and presses down on the lower half-bearing. Then install the upper half-bearing and the upper half-seat to clamp the elastic support shaft 1.

[0034] Finally, L-shaped fixing plates 10 and 11 are installed on the top surfaces of the two elastic support seats 8 respectively. Fixing plates 10 and 11 are fixed by elastic support bolts 12 and tightened according to the Dacromet bolt torque of 2100 N·m. The lower ends of fixing plates 10 and 11 respectively block the two ends of the elastic support shaft 1 to prevent it from shifting back.

[0035] Based on this embodiment, the detachable connection can be a bolt connection or a pin connection.

[0036] like Figure 1 As shown, the pull screw 7 is a double-ended screw, and the pull plate 2 and the top plate 6 are both clearance-fitted with the double-ended screw; both ends of the double-ended screw are threaded with limit nuts.

[0037] In this embodiment, the initial relative distance between the pull plate 2 and the top plate 6 can be adjusted by turning the position of the limiting nut, which is applicable to elastic support shafts 1 of different lengths and has a wider range of applications.

[0038] like Figure 1 As shown, there are six tie rods 7, all close to the edges of the pull plate 2 and the top plate 6, and evenly distributed around the sleeve 4.

[0039] In this embodiment, the six tie rods 7 form a stable and uniform force-bearing structure to prevent the elastic support shaft 1 from being eccentric during reset, causing wear or tear on the outer wall.

[0040] like Figure 1 As shown, the length of the sleeve 4 is greater than or equal to the maximum extension length of the jack 3.

[0041] In this embodiment, when the jack 3 extends, the elastic support shaft 1 moves inside the sleeve 4. If the sleeve 4 is smaller than the extension length of the jack 3, it cannot be guaranteed that the elastic support shaft 1 can be fully reset.

[0042] Based on this embodiment, the length of the sleeve 4 is greater than or equal to half the total length of the elastic support shaft 1.

[0043] like Figure 1 As shown, a sealing plate is fixedly provided at one end of the sleeve 4 facing the base of the jack 3.

[0044] In this embodiment, one end of the sleeve 4 is open, and the other end is closed, with the closed end being a sealing plate. The sealing plate increases the contact area between the end face of the sleeve 4 and the base of the jack 3, thereby reducing the pressure.

[0045] Example 2

[0046] like Figure 5 As shown, as a parallel technical solution of Embodiment 1, a reset fixture for a wind turbine gearbox elastic support shaft includes a pull plate 2 and a top plate 6 that are parallel to each other. The pull plate 2 has a through hole to avoid the elastic support shaft 1. The top plate 6 is connected to the pull plate 2 by at least two tie rods 7. A jack 3 is provided on the side of the top plate 6 facing the pull plate 2, and the working end of the jack 3 abuts against the top plate 6.

[0047] This embodiment is mainly applicable to the side where the elastic support shaft 1 extends outward (i.e., Figure 5 In cases where there is sufficient installation space on the side where the top plate 6 is located.

[0048] Specifically, after the elastic support shaft 1 extends out of the hole in the torque arm 5 toward the generator side, the pull plate 2 is placed on the side of the elastic support shaft 1 that needs to be reset. The pull plate 2 is close to the side wall of the torque arm 5, and one end of the elastic support shaft 1 passes through the through hole. The base of the jack 3 is placed on the end face of the end of the elastic support shaft 1 that extends out. The working end of the jack 3 presses against the top plate 6. The top plate 6 and the pull plate 2 are connected by the tie rod 7.

[0049] When jack 3 is started, the working end of jack 3 pushes the top plate 6. Since the pull plate 2 is close to the side wall of the torque arm 5 and cannot move, the top plate 6 is pulled by the tie rod 7 and cannot move towards the generator side. Therefore, the base of jack 3 will apply the reaction force to the elastic support shaft 1, causing the elastic support shaft 1 to reset in the direction away from the top plate 6.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A reset fixture for a wind turbine gearbox elastic support shaft, characterized in that, It includes a pull plate (2) and a top plate (6) that are parallel to each other. The top plate (6) is connected to the pull plate (2) by at least two tie rods (7). A jack (3) is provided on the side of the top plate (6) facing the pull plate (2). The working end of the jack (3) abuts against the top plate (6). The base of the jack (3) is provided with a sleeve (4). One end of the sleeve (4) is closed and the closed end is detachably connected to the base of the jack (3).

2. The reset fixture for the elastic support shaft of a wind turbine gearbox according to claim 1, characterized in that, The pull screw (7) is a double-ended screw, and the pull plate (2) and the top plate (6) are both clearance-fitted with the double-ended screw; both ends of the double-ended screw are threaded with limit nuts.

3. The reset fixture for the elastic support shaft of a wind turbine gearbox according to claim 2, characterized in that, The number of the pull screws (7) is six, all close to the edges of the pull plate (2) and the top plate (6), and evenly distributed around the sleeve (4).

4. The reset fixture for the elastic support shaft of a wind turbine gearbox according to claim 1, characterized in that, The length of the sleeve (4) is greater than or equal to the maximum extension length of the jack (3).

5. The reset fixture for the elastic support shaft of a wind turbine gearbox according to claim 4, characterized in that, The sleeve (4) is fixed with a sealing plate at one end facing the base of the jack (3).

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