Mounting device for front end cover of main shaft assembly of wind generating set and using method of mounting device

Abstract

The invention discloses an installation device for a front end cover of a main shaft assembly of a wind generating set and a using method of the installation device. The installation device comprises an upper supporting frame, a sliding block, a lower support, a lower supporting rod, an adjusting screw rod, a base plate, a locking nut, a universal ball and a puller bolt. The two ends of the adjusting screw are in threaded connection with the upper supporting frame and the lower supporting base respectively, and the overall height of the device is adjusted by adjusting the screwing-in depth of the two ends of the screw. The bottom end of the lower supporting rod penetrates through any round hole of the main shaft front-end flange and is connected with the main shaft front flange through a base plate and a locking nut. The sliding block is slidably mounted at the top of the upper supporting frame, the universal ball is mounted at the top of the sliding block, and the sliding block can move to a preset mounting position, so that the top of the universal ball jacks the front end cover; the puller bolts are installed on the two sides of the sliding block in a pre-tightening mode and make contact with the upper supporting frame. Front end cover installation of various types is met, the front end cover is rotated, the front end cover and a bearing seat are installed in an aligned mode, overall installation is easy and convenient, efficiency is high, and universality is high.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine generator front end cover installation, and in particular to a wind turbine generator main shaft assembly front end cover and its usage method. Background Technology

[0002] Wind turbine main shaft assemblies typically employ a vertical assembly process: the main shaft is first placed vertically, and the front end cover, bearing housing, and other components are assembled sequentially. After the main shaft assembly is fully assembled, it is then flipped to a horizontal position to mate with other components of the nacelle. Following the assembly sequence, the front end cover must first be fitted onto the main shaft. After the bearing housing and associated parts are in place, the front end cover is then lifted upwards and secured to the bearing housing end face.

[0003] Because the front end of the main shaft has a composite shape with a rounded transition structure and an outer flange, there is no flat support surface under the front cover corresponding to the rounded neck section of the main shaft. Therefore, it is impossible to directly use jacks to push the front cover into place for installation on the main shaft flange. Currently, the industry generally uses a special mounting bracket with jacks to lift the front cover. However, due to the large differences in the front end structure of the main shaft of different models and the large range of height dimensions from the main shaft flange to the front cover mounting surface, the special mounting bracket has poor universality and low interchangeability. It needs to be designed and manufactured separately for each wind turbine model, resulting in high cost and long cycle time.

[0004] Meanwhile, the jack can only provide vertical lifting force and cannot drive the front cover to rotate circumferentially. During the installation process, it is difficult to quickly and accurately align the bolt holes of the front cover with the threaded holes of the bearing seat, resulting in bolt alignment difficulties, low assembly efficiency, and the risk of repeated adjustments and damage to the mating surfaces, which seriously affects the assembly quality and work efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a front cover for a wind turbine generator main shaft assembly and its usage method. This invention satisfies the installation requirements of front covers for various wind turbine generator models, while allowing direct rotation of the front cover to align the mounting holes of the front cover with the threaded holes on the bearing housing. This makes installation simple, efficient, and highly versatile.

[0006] To achieve the aforementioned first objective, the technical solution provided by this invention is as follows: a wind turbine generator main shaft assembly front cover mounting device, comprising an upper support frame, a slider, a lower support, a lower support rod, an adjusting screw, a pad, a locking nut, a universal ball joint, and a tightening bolt; the upper support frame, adjusting screw, lower support, and lower support rod are connected sequentially from top to bottom, wherein the two ends of the adjusting screw are threadedly connected to the upper support frame and the lower support respectively, and the overall height of the device is adjusted by adjusting the screw's screw depth; the bottom end of the lower support rod passes through any one of the circular holes of the main shaft front flange and is connected to the main shaft front flange through the pad and the locking nut; the slider is slidably mounted on the top of the upper support frame, the universal ball joint is mounted on the top of the slider, and the slider can move to a preset installation position so that the top of the universal ball joint supports the plane of the front cover; the tightening bolt is pre-tightly mounted on both sides of the slider and contacts the upper support frame, thus limiting the slider's position.

[0007] Furthermore, the upper support frame includes a sliding plate, a first reinforcing rib, a second reinforcing rib, a pipe fitting, and an upper threaded connecting block; one end of the pipe fitting is connected to the sliding plate, and the other end of the pipe fitting is connected to the upper threaded connecting block; the hollow inner wall surface of the upper threaded connecting block is provided with a first thread; the two ends of the first reinforcing rib and the second reinforcing rib are respectively connected to the sliding plate and the pipe fitting.

[0008] Furthermore, the bottom of the slider has a groove that matches the slide plate, through which a sliding connection is formed with the slide plate; the sides of the slider have tightening bolt holes for installing tightening bolts; the top of the slider has a universal ball mounting port for connecting with a universal ball.

[0009] Furthermore, the top surface of the adjusting screw is provided with a second thread that matches the first thread of the upper threaded connecting block, and the top of the adjusting screw and the upper threaded connecting block are threaded together by the second thread and the first thread; the bottom surface of the adjusting screw is provided with a third thread; the center part of the adjusting screw is provided with a flat opening for operating the adjustment screw to rotate.

[0010] Furthermore, the lower support includes a lower threaded connecting block and a mounting plate installed sequentially from top to bottom; the mounting plate has a circular hole in the middle for installing the lower threaded connecting block, and the mounting plate has a plurality of first bolt holes evenly distributed along the circumference of the circular hole; the lower threaded connecting block is installed in the circular hole, and the hollow inner wall surface of the lower threaded connecting block is provided with a fourth thread, and the bottom end of the adjusting screw is threadedly connected to the lower threaded connecting block through the fourth thread and the third thread.

[0011] Furthermore, the lower support rod includes a lower connecting plate, connecting bolts, and a support rod; the lower connecting plate is provided with a plurality of circumferentially distributed second bolt holes, and the second bolt holes are connected to the first bolt holes by connecting bolts; one end of the support rod is connected to the lower connecting plate, and the other end of the support rod is provided with a fifth thread for installing a pad and a locking nut.

[0012] A method of using the aforementioned wind turbine generator main shaft assembly front cover mounting device includes the following steps:

[0013] S1. Install several sets of wind turbine generator main shaft assembly front cover mounting devices on the front flange of the wind turbine generator main shaft.

[0014] S2. Rotate the adjusting screws of the front cover mounting devices of all wind turbine main shaft components to reduce the depth of screwing, so that all upper support frames are lowered to the preset lowest position. After the front cover is hoisted into the main shaft, slide all sliders to the preset installation position so that the top of all universal balls rests on the plane of the front cover. Then tighten the tightening bolts on both sides of all sliders to limit the sliders.

[0015] S3. After the other spindle components are installed, rotate all the adjusting screws to increase the screw depth to lift all the upper support frames, which will lift the front cover to the preset position. Then rotate the front cover horizontally to align the mounting hole of the front cover with the threaded hole of the bearing seat, and connect the front cover to the bearing seat with screws.

[0016] S4. Rotate all adjusting screws to their depth, lower all upper support frames away from the bearing seats, then remove all gaskets and lock nuts to detach all wind turbine main shaft assembly front cover mounting devices from the main shaft front flange, completing the installation of the wind turbine main shaft front cover.

[0017] Furthermore, step S1 includes:

[0018] Several sets of wind turbine generator main shaft assembly front cover mounting devices are evenly distributed around the front flange of the main shaft, and the lower support rod of each wind turbine generator main shaft assembly front cover mounting device is connected to the round hole of the front flange of the main shaft through a pad and a lock nut.

[0019] Furthermore, step S1 includes:

[0020] Three sets of wind turbine generator main shaft assembly front cover mounting devices were selected and installed on the front flange of the main shaft in a circumferentially distributed manner.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. This invention uses a rotating adjusting screw to adjust the height of the device to lift the front cover, which is suitable for the installation height of the front cover of different wind turbine generator models. After the front cover is installed, the upper support frame can also be lowered by rotating the adjusting screw for easy removal.

[0023] 2. The lower support rod only needs to be installed in any one of the round holes of the front flange of the main shaft, which avoids the influence of different hole spacings of the main shaft of various wind turbine generator models and solves the problem of different main shaft flanges of various models leading to incompatibility of different mounting bases.

[0024] 3. The slider can slide back and forth on the slide plate of the upper support frame, ensuring that the universal ball joint of the slider is on the plane of the front cover, which meets the needs of different front cover structures of various wind turbine generator models.

[0025] 4. A universal ball is installed on the slider. When the front end cover is lifted to the appropriate position and installed with the bearing seat, the universal ball rotates the front end cover so that the mounting hole of the front end cover is aligned with the threaded hole of the bearing seat, thus solving the problem of difficult hole alignment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the front cover mounting device for the main shaft assembly of a wind turbine generator set.

[0027] Figure 2 This is a schematic diagram of the upper support frame.

[0028] Figure 3 This is a schematic diagram of the slider's structure.

[0029] Figure 4 This is a schematic diagram of the lower support structure.

[0030] Figure 5 This is a schematic diagram of the lower support rod.

[0031] Figure 6 This is a schematic diagram of the adjusting screw.

[0032] Figure 7 This is a schematic diagram of the installation structure for step S1.

[0033] Figure 8 This is a schematic diagram of the installation structure for step S2.

[0034] Figure 9 This is a schematic diagram of the installation structure for step S3.

[0035] Figure 10 This is a schematic diagram of the installation structure for step S4. Detailed Implementation

[0036] The present invention will be further described below with reference to specific embodiments.

[0037] Example 1

[0038] See Figures 1 to 6 As shown, the wind turbine generator main shaft assembly front cover mounting device provided in this embodiment includes an upper support frame 1, a slider 2, a lower support 3, a lower support rod 4, an adjusting screw 5, a pad 6, a locking nut 7, a universal ball 8, and a tightening bolt 9.

[0039] The upper support frame 1, adjusting screw 5, lower support 3, and lower support rod 4 are connected sequentially from top to bottom. The two ends of the adjusting screw 5 are threaded to the upper support frame 1 and the lower support 3, respectively. The overall height of the device is adjusted by adjusting the depth of screw insertion at both ends of the adjusting screw 5. The bottom end of the lower support rod 4 passes through any one of the round holes of the front flange of the main shaft and is connected to the front flange of the main shaft through the pad 6 and the locking nut 7. The slider 2 is slidably installed on the top of the upper support frame 1, and the universal ball 8 is installed on the top of the slider 2. The slider 2 can move to the preset installation position so that the top of the universal ball 8 supports the plane of the front end cover. The tightening bolt 9 is pre-tightened and installed on both sides of the slider 2 and contacts the upper support frame 1 to limit the slider 2.

[0040] The upper support frame 1 includes a sliding plate 101, a first reinforcing rib 102, a second reinforcing rib 103, a pipe fitting 104, and an upper threaded connecting block 105; one end of the pipe fitting 104 is connected to the sliding plate 101, and the other end of the pipe fitting 104 is connected to the upper threaded connecting block 105. Preferably, the pipe fitting 104 is a steel pipe fitting; the hollow inner wall surface of the upper threaded connecting block 105 is provided with a first thread 106, which is a right-hand thread; the two ends of the first reinforcing rib 102 and the second reinforcing rib 103 are respectively connected to the sliding plate 101 and the pipe fitting 104.

[0041] The top surface of the adjusting screw 5 is provided with a second thread 501 that matches the first thread 106 of the upper threaded connecting block 105. The second thread 501 is a right-hand thread. The top of the adjusting screw 5 and the upper threaded connecting block 105 are connected by the second thread 501 and the first thread 106. The bottom surface of the adjusting screw 5 is provided with a third thread 502, which is a left-hand thread. The center of the adjusting screw 5 is provided with a flat opening 503 for operating the adjusting screw 5 to rotate in the horizontal direction.

[0042] The lower support 3 includes a lower threaded connecting block 301 and a mounting plate 302 installed sequentially from top to bottom; the middle part of the mounting plate 302 is provided with a circular hole 303 for installing the lower threaded connecting block 301, and the mounting plate 302 is provided with a plurality of first bolt holes 304 evenly distributed around the circular hole 303; the lower threaded connecting block 301 is installed in the circular hole 303, and the hollow inner wall surface of the lower threaded connecting block 301 is provided with a fourth thread 305, which is a left-hand thread, and the bottom end of the adjusting screw 5 is threadedly connected to the lower threaded connecting block 301 through the fourth thread 305 and the third thread.

[0043] The lower support rod 4 includes a lower connecting plate 401, a connecting bolt 10, and a support rod 402. The lower connecting plate 401 is provided with a plurality of circumferentially distributed second bolt holes 403. The second bolt holes 403 are connected to the first bolt holes 304 by connecting bolts 10, matching connecting nuts 11, and washers 12. One end of the support rod 402 is connected to the lower connecting plate 401, and the other end of the support rod 402 is provided with a fifth thread 404 for installing a pad 6 and a locking nut 7.

[0044] The bottom of the slider 2 has a groove 201 that matches the slide plate 101, and the slider 2 is slidably connected to the slide plate 101 through the groove 201; the sides of the slider 2 have tightening bolt holes 202 for installing tightening bolts 9; the top of the slider 2 has a universal ball mounting port 203 for connecting with the universal ball 8.

[0045] Example 2

[0046] This embodiment provides a method for using the wind turbine generator main shaft assembly front end cover mounting device according to Embodiment 1, including the following steps:

[0047] S1. Several sets of wind turbine main shaft assembly front cover mounting devices a are installed on the front flange c of the wind turbine main shaft b. The front flange c is supported by the main shaft support d; see also Figure 7 As shown, the three sets of wind turbine generator main shaft assembly front cover mounting devices a are evenly distributed in a circle on the main shaft front flange c of the main shaft b, and the lower support rod of each wind turbine generator main shaft assembly front cover mounting device a is connected to the circular hole of the main shaft front flange c through a pad and a locking nut.

[0048] S2, see also Figure 8 As shown, rotate the adjusting screws of the front cover mounting device a of all wind turbine main shaft assemblies to reduce their screw depth so that all upper support frames 1 are lowered to the preset lowest position. After the front cover e is hoisted and fitted into the main shaft b, slide all sliders 2 to the preset installation position so that the tops of all universal balls 8 are supported on the plane of the front cover e. Then tighten the tightening bolts on both sides of all sliders 2 to limit the sliders 2.

[0049] S3, see also Figure 9 As shown, after the other spindle components are installed, rotate all the adjusting screws 5 to increase their screw depth so that all the upper support frames 1 are raised, which in turn lifts the front cover e to the preset position. Then rotate the front cover e horizontally so that the mounting hole e1 of the front cover e is aligned with the threaded hole of the bearing seat f. The front cover e is then connected to the bearing seat f by screws.

[0050] S4, see also Figure 10 As shown, rotate all adjusting screws 5 to their screw depths, so that all upper support frames 1 are lowered away from bearing seats f. Then remove all gaskets and lock nuts (not shown in the figure) to detach all wind turbine main shaft assembly front cover mounting devices a from the main shaft front flange c, thus completing the installation of the wind turbine front cover e.

[0051] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A front end cover mounting device for a wind turbine generator main shaft assembly, characterized in that: The device includes an upper support frame, a slider, a lower support, a lower support rod, an adjusting screw, a pad, a lock nut, a universal ball joint, and a tightening bolt. The upper support frame, adjusting screw, lower support, and lower support rod are connected sequentially from top to bottom. The two ends of the adjusting screw are threaded to the upper support frame and the lower support, respectively, and the overall height of the device is adjusted by adjusting the depth of screw insertion. The bottom end of the lower support rod passes through any one of the round holes of the front flange of the main shaft and is connected to the front flange of the main shaft through the pad and the lock nut. The slider is slidably mounted on the top of the upper support frame, and the universal ball joint is mounted on the top of the slider. The slider can move to a preset installation position so that the top of the universal ball joint rests on the plane of the front cover. The tightening bolt is pre-tightly mounted on both sides of the slider and contacts the upper support frame, thus limiting the slider's movement.

2. The wind turbine generator main shaft assembly front end cover mounting device according to claim 1, characterized in that: The upper support frame includes a sliding plate, a first reinforcing rib, a second reinforcing rib, a pipe fitting, and an upper threaded connecting block; one end of the pipe fitting is connected to the sliding plate, and the other end of the pipe fitting is connected to the upper threaded connecting block; the hollow inner wall surface of the upper threaded connecting block is provided with a first thread; the two ends of the first reinforcing rib and the second reinforcing rib are respectively connected to the sliding plate and the pipe fitting.

3. The wind turbine generator main shaft assembly front end cover mounting device according to claim 2, characterized in that: The bottom of the slider has a groove that matches the slide plate, through which a sliding connection is formed with the slide plate; the sides of the slider have tightening bolt holes for installing tightening bolts; the top of the slider has a universal ball mounting port for connecting with a universal ball.

4. The wind turbine generator main shaft assembly front end cover mounting device according to claim 2, characterized in that: The top surface of the adjusting screw is provided with a second thread that matches the first thread of the upper threaded connecting block, and the top of the adjusting screw and the upper threaded connecting block are threaded together by the second thread and the first thread; the bottom surface of the adjusting screw is provided with a third thread; the center part of the adjusting screw is provided with a flat opening for operating the adjustment screw to rotate.

5. The wind turbine generator main shaft assembly front end cover mounting device according to claim 4, characterized in that: The lower support includes a lower threaded connecting block and a mounting plate installed sequentially from top to bottom; the mounting plate has a circular hole in the middle for installing the lower threaded connecting block, and the mounting plate has a plurality of first bolt holes evenly distributed along the circumference of the circular hole; the lower threaded connecting block is installed in the circular hole, and the hollow inner wall surface of the lower threaded connecting block is provided with a fourth thread, and the bottom end of the adjusting screw is threadedly connected to the lower threaded connecting block through the fourth thread and the third thread.

6. The wind turbine generator main shaft assembly front end cover mounting device according to claim 5, characterized in that: The lower support rod includes a lower connecting plate, connecting bolts, and a support rod; the lower connecting plate is provided with a plurality of circumferentially distributed second bolt holes, and the second bolt holes are connected to the first bolt holes by connecting bolts; one end of the support rod is connected to the lower connecting plate, and the other end of the support rod is provided with a fifth thread for installing a pad and a locking nut.

7. A method of using the front end cover mounting device for the main shaft assembly of a wind turbine generator set according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Install several sets of wind turbine generator main shaft assembly front cover mounting devices on the front flange of the wind turbine generator main shaft. S2. Rotate the adjusting screws of the front cover mounting devices of all wind turbine main shaft components to reduce the depth of screwing, so that all upper support frames are lowered to the preset lowest position. After the front cover is hoisted into the main shaft, slide all sliders to the preset installation position so that the top of all universal balls rests on the plane of the front cover. Then tighten the tightening bolts on both sides of all sliders to limit the sliders. S3. After the other spindle components are installed, rotate all the adjusting screws to increase the screw depth to lift all the upper support frames, which will lift the front cover to the preset position. Then rotate the front cover horizontally to align the mounting hole of the front cover with the threaded hole of the bearing seat, and connect the front cover to the bearing seat with screws. S4. Rotate all adjusting screws to their depth, lower all upper support frames away from the bearing seats, then remove all gaskets and lock nuts to detach all wind turbine main shaft assembly front cover mounting devices from the main shaft front flange, completing the installation of the wind turbine main shaft front cover.

8. The method of using the wind turbine generator main shaft assembly front end cover mounting device according to claim 7, characterized in that, Step S1 includes: Several sets of wind turbine generator main shaft assembly front cover mounting devices are evenly distributed around the front flange of the main shaft, and the lower support rod of each wind turbine generator main shaft assembly front cover mounting device is connected to the round hole of the front flange of the main shaft through a pad and a lock nut.

9. The method of using the wind turbine generator main shaft assembly front cover mounting device according to claim 8, characterized in that, Step S1 includes: Three sets of wind turbine generator main shaft assembly front cover mounting devices were selected and installed on the front flange of the main shaft in a circumferentially distributed manner.

Images