A method and structure for assembling a secondary output shaft of a wind turbine generator set

Abstract

The present invention provides a method and structure for assembling a secondary output shaft of a wind turbine generator set; wherein the method comprises: assembling the secondary output shaft by using a tool with a cushion block; the cushion block height is equal to the clearance height required between the secondary output shaft and the primary sun gear; inserting the tool into the inner hole of the secondary output shaft; placing the secondary output shaft together with the tool above the primary sun gear of the gear box, and the cushion block is arranged between the secondary output shaft and the primary sun gear; installing the generator; arranging a coupling on the outer shell of the secondary output shaft to fix the secondary output shaft; leaving a gap between the secondary output shaft and the cushion block by a push module; retracting the cushion block; taking out the tool; releasing the lifting of the push module, and completing the assembly of the secondary output shaft. The method can leave an accurate clearance height between the secondary output shaft and the primary sun gear, meet the installation clearance requirements of the secondary output shaft and the primary sun gear, and is conducive to improving assembly efficiency and reducing the labor intensity of operators.

Description

Technical Field

[0001] The invention relates to the technical field of wind generator assembly, and more specifically to an assembly method and structure of a secondary output shaft of a wind generator. Background Art

[0002] Semi-direct drive wind turbines have gearbox components due to their own structural characteristics. The gearbox has a primary sun gear, a secondary planetary gear, a secondary output shaft and other parts. The secondary output shaft is installed in the middle of a circle of secondary planetary gears and meshes with the gears of each secondary planetary gear. There is a gap between the secondary output shaft and the end face of the primary sun gear. The height of the gap varies in different models, and the height error requirements are extremely strict to ensure that the meshing length of the gears between the secondary output shaft and the secondary planetary gears meets the requirements.

[0003] The assembly of the secondary output shaft is usually carried out when the gearbox is in a vertical state. The crane lifts the secondary output shaft vertically and places it in the middle of the secondary planetary gear. However, the accuracy of the crane's lowering cannot be controlled and the gap between the secondary output shaft and the primary sun gear cannot be measured, resulting in the difficulty in quickly and accurately achieving the gap accuracy between the secondary output shaft and the primary sun gear, which slows down the assembly efficiency and increases the labor intensity of the assemblers.

[0004] Therefore, it is urgent to design an assembly method and assembly structure that can leave an accurate gap height between the secondary output shaft and the primary sun gear. Summary of the invention

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a method for assembling the secondary output shaft of a wind turbine generator set and its structure; this method can leave an accurate gap height between the secondary output shaft and the primary sun gear, meet the installation gap requirements between the secondary output shaft and the primary sun gear, and is conducive to improving assembly efficiency and reducing the labor intensity of operators.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented by the following technical scheme: a method for assembling the secondary output shaft of a wind turbine generator set, using a tool to assemble the secondary output shaft, the tool having a cushion block; the cushion block can be rotated on a horizontal plane to achieve a change between a retracted state and an open state; the height of the cushion block is equal to the required clearance height between the secondary output shaft and the primary sun gear; when the cushion block is in the retracted state, one end of the tool with the cushion block is inserted into the inner hole of the secondary output shaft, and then extends out of the inner hole of the secondary output shaft; after the cushion block is rotated to the open state, it is cushioned below the lower edge of the inner hole of the secondary output shaft;

[0007] Place the secondary output shaft together with the tooling above the primary sun gear of the gearbox, and place the pad between the secondary output shaft and the primary sun gear;

[0008] Install the generator so that the generator is supported on the gearbox housing; arrange a coupling on the outer shell of the secondary output shaft, and the coupling is supported on the generator; the coupling includes a coupling base and an expansion sleeve assembly connected to each other; hold and fix the expansion sleeve assembly to the secondary output shaft;

[0009] The expansion sleeve assembly drives the secondary output shaft to be raised in height through the push module of the expansion sleeve assembly, so that a gap is left between the secondary output shaft and the cushion block;

[0010] Rotate the cushion block to the retracted state; pass the cushion block through the inner hole of the secondary output shaft to remove the tooling; release the lifting of the push module, and lower the expansion sleeve assembly and the secondary output shaft until the expansion sleeve assembly is reset to connect with the coupling base, and the clearance height between the secondary output shaft and the primary sun gear is equal to the cushion block height, and the secondary output shaft assembly is completed.

[0011] The method of the present invention can leave an accurate gap height between the secondary output shaft and the primary sun gear, meet the installation gap requirement of the secondary output shaft and the primary sun gear, thereby ensuring that the gear meshing length between the secondary output shaft and the secondary planetary gear meets the requirement, and is beneficial to improving assembly efficiency; the operation is simple and convenient, and the labor intensity of operators can be reduced.

[0012] Preferably, different heights of pads are used to match different clearance height requirements between the secondary output shaft and the primary sun gear. Adjusting the clearance between the secondary output shaft and the primary sun gear by using pads of different heights is easy to implement and has high precision.

[0013] A secondary output shaft assembly structure of a wind turbine generator set is used to implement the secondary output shaft assembly method of the wind turbine generator set mentioned above; it includes a tool and a coupling for fixing the secondary output shaft; the tool includes a connecting assembly and at least two pull rods; each pull rod is rotatably inserted into the connecting assembly; the lower end of each pull rod is fixedly or detachably connected with a pad, so that the pad can be rotated in the horizontal plane to achieve the change between the retracted state and the open state, so that the pad can pass through the inner hole of the secondary output shaft in the retracted state and be padded between the secondary output shaft and the primary sun gear in the open state; the coupling includes a coupling base and an expansion sleeve assembly for clamping and fixing the secondary output shaft; the expansion sleeve assembly is connected to the coupling base; the expansion sleeve assembly is provided with a pushing module towards the coupling base to achieve the height lifting of the expansion sleeve assembly.

[0014] The assembly structure of the present invention can leave an accurate gap height between the secondary output shaft and the primary sun gear, meet the installation gap requirements of the secondary output shaft and the primary sun gear, thereby ensuring that the gear meshing length between the secondary output shaft and the secondary planetary gear meets the requirements and is conducive to improving assembly efficiency; the operation is simple and convenient, and the labor intensity of the operator can be reduced.

[0015] Preferably, the connection assembly includes an upper connection plate and a lower connection plate; the upper connection plate is mounted above the upper edge of the inner hole of the secondary output shaft; the lower connection plate is located in the inner hole of the secondary output shaft; each pull rod is respectively passed through the upper connection plate and the lower connection plate. The connection assembly can improve the stability of the tooling, thereby improving the convenience and smoothness of the pull rod rotation.

[0016] Preferably, each pull rod is provided with a retaining ring 1 on the upper and lower sides of the upper connecting plate for limiting the upper and lower limit positions of the upper connecting plate; each pull rod is provided with a retaining ring 2 on the upper and lower sides of the lower connecting plate for limiting the upper and lower limit positions of the lower connecting plate.

[0017] Preferably, the lower end of the pull rod is provided with a mounting protrusion with a T-shaped cross section; the cushion block is located on one side of the T-shaped mounting protrusion, and a connecting piece extends from the other side of the T-shaped mounting protrusion until it is connected to the cushion block to achieve a detachable connection between the cushion block and the pull rod, which can improve the accuracy of the cushion block installation angle and ensure the cushion block is installed with high accuracy.

[0018] Preferably, the push module is a plurality of push bolts; the expansion sleeve assembly is provided with a plurality of push screw holes; each push bolt is screwed to the push screw hole; when the expansion sleeve assembly is highly raised, the ends of each push bolt extend from the push screw hole and abut against the coupling base. The expansion sleeve assembly is raised by rotating the push bolts to increase the extension length of the push bolts; after the cushion block is rotated to the retracted state, the push bolts are rotated in the opposite direction to completely retract the ends of the push bolts into the push screw holes, and the coupling base and the expansion sleeve assembly are reconnected. The push module has a simple structure and can achieve the lifting of the expansion sleeve assembly.

[0019] Preferably, the expansion sleeve assembly comprises an inner expansion sleeve and an outer expansion sleeve; the inner expansion sleeve is sleeved outside the secondary output shaft, and the outer expansion sleeve is sleeved and locked outside the inner expansion sleeve, so that the inner expansion sleeve hugs and fixes the secondary output shaft.

[0020] Preferably, the connection assembly is provided with a hanging connection portion for hanging connection.

[0021] Preferably, the upper end of each pull rod has a bend, so that the pad can be folded or opened by pulling the pull rod.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] 1. The present invention can leave an accurate gap height between the secondary output shaft and the primary sun gear, meet the installation gap requirements of the secondary output shaft and the primary sun gear, thereby ensuring that the gear meshing length between the secondary output shaft and the secondary planetary gear meets the requirements, and is conducive to improving assembly efficiency; the operation is simple and convenient, and the labor intensity of the operator can be reduced;

[0024] 2. The present invention adjusts the gap between the secondary output shaft and the primary sun gear by using pads of different heights, which is easy to implement and has high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the secondary output shaft assembly structure of the wind turbine generator set of the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged view of

[0027] Figure 3 It is a structural schematic diagram of the tooling in the secondary output shaft assembly structure of the wind turbine generator set of the present invention;

[0028] Figure 4 It is a schematic diagram of the open state of the tooling in the secondary output shaft assembly structure of the wind turbine generator set of the present invention;

[0029] Figure 5 It is a schematic diagram of the stowed state of the tooling in the secondary output shaft assembly structure of the wind turbine generator set of the present invention;

[0030] Among them, 1 is a pull rod, 1.1 is a bend, 2 is an upper connecting plate, 3 is a lower connecting plate, 4 is a gasket, 5 is a retaining ring 1, 6 is a retaining ring 2, 7 is a secondary output shaft, 8 is a secondary planetary gear, 9 is a primary sun gear, 10 is an inner expansion sleeve, 11 is an outer expansion sleeve, 12 is a coupling base, 13 is a thrust bolt, and 14 is a supporting surface. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example

[0033] This embodiment provides a method for assembling a secondary output shaft of a wind generator set, and provides a secondary output shaft assembly structure of a wind generator set for implementing the method.

[0034] The assembly method is: Use tooling to assemble the secondary output shaft, such as Figure 1 and Figure 2 The tooling includes a connecting assembly and at least two tie rods 1, such as Figures 3 to 5 As shown; in this embodiment, there are two pull rods, but in actual application, there may be three, four, or even more pull rods. Each pull rod 1 is rotatably arranged in the connection assembly; the lower end of each pull rod 1 is fixedly or detachably connected to a cushion block 4, so that the cushion block 4 can be rotated on the horizontal plane to achieve the change of the retracted state and the open state. The upper end of each pull rod 1 has a bend 1.1, which is convenient for pulling the pull rod 1 to retract or open the cushion block 4.

[0035] The height of the cushion block 4 is equal to the required clearance height between the secondary output shaft 7 and the primary sun gear 9; when the cushion block 4 is in the retracted state, one end of the tooling with the cushion block 4 is inserted into the inner hole of the secondary output shaft 7, and then extends out from the inner hole of the secondary output shaft 7; after the cushion block 4 is rotated to the open state, it is placed below the lower edge of the inner hole of the secondary output shaft 7.

[0036] Put the secondary output shaft 7 together with the tooling onto the primary sun gear 9 of the gear box, and place the cushion block 4 between the secondary output shaft 7 and the primary sun gear 9 .

[0037] The generator is installed so that the generator is supported on the gearbox housing, for example, the generator is supported on the supporting surface 14 of the gearbox housing; a coupling is arranged on the outer surface of the secondary output shaft 7, and the coupling is supported on the generator; the coupling includes a coupling base 12 and an expansion sleeve assembly connected to each other; the expansion sleeve assembly is tightly held and fixed to the secondary output shaft 7. Specifically, the expansion sleeve assembly includes an inner expansion sleeve 10 and an outer expansion sleeve 11; the inner expansion sleeve 10 is sleeved on the outer surface of the secondary output shaft 7, and the outer expansion sleeve 11 is sleeved and locked on the outer surface of the inner expansion sleeve 10, so that the inner expansion sleeve 10 is tightly held and fixed to the secondary output shaft 7.

[0038] The expansion sleeve assembly drives the secondary output shaft 7 to be raised in height through the pushing module of the expansion sleeve assembly, so that a gap is left between the secondary output shaft 7 and the cushion block 4. Specifically, the expansion sleeve assembly is provided with a pushing module that pushes toward the coupling base 12, and the pushing module is a plurality of pushing bolts 13; the expansion sleeve assembly is provided with a plurality of pushing screw holes; each pushing bolt 13 is screwed with the pushing screw hole; when the expansion sleeve assembly is raised in height, the end of each pushing bolt 13 extends from the pushing screw hole and abuts against the coupling base 12. The extension length of the pushing bolt 13 is increased by rotating the pushing bolt 13, so that the expansion sleeve assembly is lifted; after the cushion block 4 is rotated to the retracted state, the pushing bolt 13 is rotated in the reverse direction so that the end of the pushing bolt 13 is completely retracted into the pushing screw hole, and the coupling base 12 and the expansion sleeve assembly are connected again.

[0039] Rotate the cushion block 4 to the retracted state; pass the cushion block 4 through the inner hole of the secondary output shaft 7 to remove the tooling; release the lifting of the push module, so that the expansion sleeve assembly and the secondary output shaft 7 are lowered until the expansion sleeve assembly is reset to connect with the coupling base 12, and the gap height between the secondary output shaft 7 and the primary sun gear 9 is equal to the height of the cushion block 4, and the assembly of the secondary output shaft 7 is completed.

[0040] The method of the present invention can leave an accurate gap height between the secondary output shaft 7 and the primary sun gear 9, meet the installation gap requirement of the secondary output shaft 7 and the primary sun gear 9, thereby ensuring that the gear meshing length of the secondary output shaft 7 and the secondary planetary gear 8 meets the requirement, and is beneficial to improving the assembly efficiency; the operation is simple and convenient, and the labor intensity of the operator can be reduced.

[0041] By using the spacers 4 of different heights, the different clearance height requirements between the secondary output shaft 7 and the primary sun gear 9 are matched. The clearance between the secondary output shaft 7 and the primary sun gear 9 is adjusted by using the spacers 4 of different heights, which is easy to implement and has high precision.

[0042] Further, the connection assembly includes an upper connection plate 2 and a lower connection plate 3; the upper connection plate 2 is mounted above the upper edge of the inner hole of the secondary output shaft 7; the lower connection plate 3 is located in the inner hole of the secondary output shaft 7; and each pull rod 1 is respectively passed through the upper connection plate 2 and the lower connection plate 3. The connection assembly can improve the stability of the tooling, thereby improving the convenience and smoothness of the rotation of the pull rod 1.

[0043] Each pull rod 1 is preferably provided with a retaining ring 5 on the upper and lower sides of the upper connecting plate 2 for limiting the upper and lower limit positions of the upper connecting plate 2; each pull rod 1 is preferably provided with a retaining ring 6 on the upper and lower sides of the lower connecting plate 3 for limiting the upper and lower limit positions of the lower connecting plate 3.

[0044] For easy installation, a mounting protrusion with a T-shaped cross section is provided at the lower end of the tie rod 1; the cushion block 4 is located on one side of the T-shaped mounting protrusion, and a connecting piece extends from the other side of the T-shaped mounting protrusion until it is connected to the cushion block 4, so that the cushion block 4 is detachably connected to the tie rod 1. This can improve the accuracy of the mounting angle of the cushion block 4 and ensure that the cushion block 4 is installed with high accuracy.

[0045] The connecting assembly is provided with a hanging connection part for hanging connection. For example, in this embodiment, a hanging hole is provided on the upper connecting plate 2.

[0046] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for assembling a secondary output shaft of a wind turbine generator set, characterized in that: The secondary output shaft is assembled by using a tooling, and the tooling is provided with a pad; the pad can be rotated in a horizontal plane to achieve a change between a retracted state and an open state; the pad height is equal to the required clearance height between the secondary output shaft and the primary sun gear; when the pad is in the retracted state, one end of the tooling with the pad is inserted into the inner hole of the secondary output shaft, and then extends out of the inner hole of the secondary output shaft; after the pad is rotated to the open state, it is placed below the lower edge of the inner hole of the secondary output shaft; Place the secondary output shaft together with the tooling above the primary sun gear of the gearbox, and place the pad between the secondary output shaft and the primary sun gear; Install the generator so that the generator is supported on the gearbox housing; arrange a coupling on the outer shell of the secondary output shaft, and the coupling is supported on the generator; the coupling includes a coupling base and an expansion sleeve assembly connected to each other; hold and fix the expansion sleeve assembly to the secondary output shaft; The expansion sleeve assembly drives the secondary output shaft to be raised in height through the push module of the expansion sleeve assembly, so that a gap is left between the secondary output shaft and the cushion block; Rotate the cushion block to the retracted state; pass the cushion block through the inner hole of the secondary output shaft to remove the tooling; release the lifting of the push module, and lower the expansion sleeve assembly and the secondary output shaft until the expansion sleeve assembly is reset to connect with the coupling base, and the clearance height between the secondary output shaft and the primary sun gear is equal to the cushion block height, and the secondary output shaft assembly is completed.

2. The method for assembling the secondary output shaft of a wind turbine generator set according to claim 1, characterized in that: By using spacers of different heights, different clearance height requirements between the secondary output shaft and the primary sun gear are matched.

3. A secondary output shaft assembly structure of a wind turbine generator set, characterized in that: Used to implement the secondary output shaft assembly method of a wind turbine generator set as described in claim 1 or 2; includes a tool and a coupling for fixing the secondary output shaft; the tool includes a connecting assembly and at least two pull rods; each pull rod is rotatably inserted into the connecting assembly; the lower end of each pull rod is fixedly or detachably connected with a pad, so that the pad can be rotated in the horizontal plane to achieve the change between the retracted state and the open state, so that the pad can pass through the inner hole of the secondary output shaft in the retracted state and be arranged between the secondary output shaft and the primary sun gear in the open state; the coupling includes a coupling base and an expansion sleeve assembly for clamping and fixing the secondary output shaft; the expansion sleeve assembly is connected to the coupling base; the expansion sleeve assembly is provided with a pushing module towards the coupling base to achieve the height lifting of the expansion sleeve assembly.

4. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3 is characterized in that: The connecting assembly comprises an upper connecting plate and a lower connecting plate; the upper connecting plate is mounted above the upper edge of the inner hole of the secondary output shaft; the lower connecting plate is located in the inner hole of the secondary output shaft; and each pull rod is respectively passed through the upper connecting plate and the lower connecting plate.

5. The secondary output shaft assembly structure of a wind turbine generator set according to claim 4, characterized in that: Each pull rod is provided with a retaining ring 1 on the upper and lower sides of the upper connecting plate for limiting the upper and lower limit positions of the upper connecting plate; each pull rod is provided with a retaining ring 2 on the upper and lower sides of the lower connecting plate for limiting the upper and lower limit positions of the lower connecting plate.

6. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3, characterized in that: The lower end of the pull rod is provided with a mounting protrusion with a T-shaped cross section; the pad is located on one side of the T-shaped mounting protrusion, and extends from the other side of the T-shaped mounting protrusion through a connecting piece until it is connected to the pad to achieve a detachable connection between the pad and the pull rod.

7. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3, characterized in that: The pushing module is a plurality of pushing bolts; the expansion sleeve assembly is provided with a plurality of pushing screw holes; each pushing bolt is screwed to the pushing screw hole; when the expansion sleeve assembly is highly raised, the ends of each pushing bolt extend out from the pushing screw hole and abut against the coupling base.

8. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3, characterized in that: The expansion sleeve assembly comprises an inner expansion sleeve and an outer expansion sleeve; the inner expansion sleeve is sleeved outside the secondary output shaft, and the outer expansion sleeve is sleeved and locked outside the inner expansion sleeve, so that the inner expansion sleeve hugs and fixes the secondary output shaft.

9. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3, characterized in that: The connection assembly is provided with a hanging connection portion for hanging connection.

10. The secondary output shaft assembly structure of a wind turbine generator set according to claim 3, characterized in that: The upper end of each pull rod is respectively provided with a bend.

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