A vertical assembly platform for wind turbine stator and rotor

Abstract

The present invention discloses a vertical assembly platform for the stator and rotor of a wind turbine generator. The assembly workbench of the vertical assembly platform is paved with an insulating plate with a circular hole in the middle. A support ring is disposed within the circular hole and placed on the assembly workbench. The support ring extends through the assembly workbench below the inner circle of the support ring. The inner surface of the support ring is provided with multiple legs. An assembly base is disposed below the support ring. The assembly base is provided with multiple positioning pins in a circular array. The assembly base is also provided with a fine-tuning mechanism. A cantilever crane is also provided next to the support ring. This vertical assembly platform enables rapid assembly of the stator and rotor. It features a high degree of integration and, compared to other horizontal assembly tools, requires less equipment investment, offers a simple and convenient assembly process, and boasts high precision, high efficiency, and safety and reliability.

Description

Technical Field

[0001] The invention belongs to the field of wind generator stator and rotor assembly, and particularly relates to a vertical assembly platform for wind generator stators and rotors. Background Art

[0002] A wind turbine is a type of power generation equipment that converts wind energy into mechanical energy and mechanical energy into electrical energy. The assembly of the stator and rotor is a critical step in the wind turbine production process. Due to their large size and tonnage, and the tendency of the stator and rotor to shift or tilt under the influence of magnetic forces and their own gravity, the assembly process requires a considerable amount of time for alignment and docking, resulting in low assembly efficiency and precision.

[0003] At present, the assembly of stators and rotors of large wind turbines adopts horizontal assembly method. The horizontal assembly tooling has a complex structure and requires the addition of casing stator support components and rotor support components. It is also necessary to ensure that the center lines of the casing stator assembly and the rotor assembly are completely aligned to ensure the assembly accuracy. The overall operation is complicated, the machining requirements are high, and the equipment cost is high.

[0004] Chinese patents with publication numbers CN108880140A and CN105871137B both relate to horizontal assembly tooling and both have the aforementioned problems. Summary of the Invention

[0005] Based on the above, the present invention discloses a vertical assembly platform for the stator and rotor of a wind turbine generator, comprising an assembly workbench, an insulating plate, a support ring, a support leg, an assembly base, a positioning pin and a fine-tuning mechanism;

[0006] An insulating plate is laid on the assembly workbench, a circular hole is opened in the middle of the insulating plate, and a support ring is provided in the circular hole. The support ring is placed on the assembly workbench, and the assembly workbench below the inner circle of the support ring passes through; a plurality of supporting feet are provided on the inner ring surface of the support ring, and the supporting feet can contact the outer wall of the rotor, support the outer wall of the rotor in the horizontal direction, adjust the inclination of the rotor to make the rotor as a whole horizontal, and fix the rotor radially to prevent the rotor from tipping over when assembling other components.

[0007] The assembled base is arranged below the support ring. A plurality of positioning pins are provided in a circular array on the assembled base. The positioning pins are connected to the assembled base through bosses. The positioning pins cooperate with the pin holes on the main shaft, so that the main shaft can be accurately placed on the assembled base.

[0008] The cooperation base is also provided with a fine adjustment mechanism.

[0009] Preferably, the fine-tuning mechanism includes a sleeve, an extension rod, a telescopic rod, a clamping block, and a nut sleeve. The sleeve is fixedly connected to the assembly base, one end of the extension rod is inserted into the sleeve, the extension rod is provided with a plurality of horizontally arranged first limiting holes, the sleeve is provided with a second limiting hole, the second limiting holes being engaged with the first limiting holes at different positions on the extension rod via bolts, nuts, fasteners, or latches, thereby enabling adjustment of the extension length of the extension rod. The other end of the extension rod is hinged to one end of the telescopic rod; the other end of the telescopic rod is fixed with a clamping block, which is connected to a nut sleeve, which engages with a screw on the stator component; specifically, the telescopic rod is a hydraulic cylinder, the extension rod is hinged to the cylinder end of the hydraulic cylinder, and the clamping block is fixed to the piston rod end of the hydraulic cylinder. When the piston rod of the hydraulic cylinder is pushed out, it can push the stator component to fine-tune the concentricity, thereby correcting the stator offset and improving the assembly accuracy of the stator.

[0010] Preferably, the support ring includes a ring plate, an inner ring portion and an outer ring portion, the inner ring portion and the outer ring portion are connected by the ring plate, and a plurality of reinforcing plates are provided between the inner ring portion and the outer ring portion; a plurality of sleeves are fixed on the side of the inner ring portion, and the support foot includes a screw portion and a support portion, the screw portion and the support portion are integrally connected, the screw portion of the support foot passes through the side of the inner ring portion and is arranged in the sleeve, and adjusting nuts are provided at both ends of the sleeve, and the adjusting nuts are screwed on the screw portion of the support foot; in this way, by rotating the adjusting nut and the screw portion of the support foot, the extension distance of the support foot support portion can be conveniently adjusted, thereby conveniently adjusting the inclination degree of the rotor.

[0011] Furthermore, a cantilever crane is provided next to the support ring, and the cantilever crane includes a column, a cantilever and a rotary drive device. The column passes through the assembly workbench and the insulating plate, and the bottom end of the column is fixed to the ground by an anchor bolt; the cantilever is connected to the upper end of the column through a rotary drive device and is located above the assembly workbench; the assembly workbench is also provided with a wiring bracket that cooperates with the cantilever crane; the rotary drive device is an existing known technology; the stator, rotor and other components can all be lifted to the vertical assembly platform for assembly by the cantilever crane.

[0012] Preferably, the assembling workbench is a frame structure, which can save materials. A plurality of pillars are connected to the bottom of the assembling workbench to support the assembling workbench. Guardrails are also provided around the assembling workbench.

[0013] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0014] The vertical assembly platform for the stator and rotor of a wind turbine generator can realize rapid assembly of the stator and rotor on the platform; the main bearing can be accurately placed on the assembly base through the locating pins, and the position of the stator components can be fine-tuned to find concentricity through the fine-adjustment mechanism, so as to improve the assembly accuracy of the stator; the inclination of the rotor can be conveniently adjusted through the support ring and the multiple legs on the inner ring surface, and the position can be aligned to make it horizontal, so as to improve the assembly accuracy of the rotor, and the rotor can be fixed radially to facilitate the assembly of other components; the vertical assembly platform has a high degree of integration and, compared with other horizontal assembly tooling, has a small equipment investment, a simple and convenient assembly process, high precision, high efficiency, and safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a vertical assembly platform for a wind turbine stator and rotor according to an embodiment of the present application;

[0016] Figure 2 This is a structural diagram of the assembled base in an embodiment of the present application;

[0017] Figure 3 This is a structural diagram of the support ring and an enlarged view of point A in an embodiment of the present application;

[0018] Figure 4 This is a schematic diagram of assembling the rotor, stator and other components on the vertical assembly platform in an embodiment of the present application;

[0019] Explanation of the accompanying drawings: 1 assembled workbench, 101 pillar, 102 guardrail, 2 insulating plate, 3 support ring, 301 ring plate, 302 inner ring portion, 303 outer ring portion, 304 reinforcing plate, 305 sleeve, 4 supporting leg, 401 screw portion, 402 supporting portion, 403 adjusting nut, 5 assembled base, 6 positioning pin, 601 boss, 7 fine-tuning mechanism, 701 sleeve, 7012 second limiting hole, 702 extension rod, 7021 first limiting hole, 703 telescopic rod (hydraulic cylinder), 7031 clamping block, 7032 nut sleeve, 8 cantilever crane, 801 column, 802 cantilever, 803 rotary drive device, 9 wiring bracket, 10 rotor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front" and "back" indicating directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] In the description of the invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0022] refer to Figure 1-4 A vertical assembly platform for a wind turbine stator and rotor comprises an assembly workbench 1, an insulating plate 2, a support ring 3, a support leg 4, an assembly base 5, a positioning pin 6, a fine-tuning mechanism 7 and a cantilever crane 8.

[0023] The assembly workbench 1 is a frame structure, which can save materials. Four pillars 101 are connected to the bottom of the assembly workbench 1, and the pillars 101 can support the assembly workbench 1. Guardrails 102 are also provided around the assembly workbench 1.

[0024] An insulating plate 2 is laid on the assembly workbench 1, and a circular hole is opened in the middle of the insulating plate 2. A support ring 3 is provided in the circular hole. The support ring 3 is placed on the assembly workbench 1, and the assembly workbench 1 below the inner circle of the support ring 3 passes through; a plurality of support legs 4 are provided on the inner ring surface of the support ring 3; the support legs 4 can contact the outer wall of the rotor 10, can support the outer wall of the rotor 10 in the horizontal direction, can adjust the inclination of the rotor 10 to make the rotor 10 as a whole horizontal, and can fix the rotor 10 radially to prevent the rotor 10 from tipping over when assembling other components.

[0025] The assembly base 5 is arranged below the support ring 3. Figure 2 , six positioning pins 6 are provided in a circular array on the assembled base 5, and the positioning pins 6 are connected to the assembled base 5 through the boss 601. The positioning pins 6 cooperate with the pin holes on the main shaft, so that the main shaft can be accurately placed on the assembled base 5.

[0026] Reference Figure 2 The cooperative base is also provided with a fine-tuning mechanism 7, which includes a sleeve 701, an extension rod 702, a telescopic rod 703, a clamping block 7031 and a nut sleeve 7032; the sleeve 701 is fixedly connected to the combined base 5, and one end of the extension rod 702 is inserted into the sleeve 701; the extension rod 702 is provided with a plurality of horizontally arranged first limiting holes 7021, and the sleeve 701 ... A second limiting hole 7012 is formed on the extension rod 702. This second limiting hole 7012 engages with first limiting holes 7021 at different locations on the extension rod 702 via bolts, nuts, or latches, allowing adjustment of the extension length of the extension rod 702. The other end of the extension rod 702 is hingedly connected to one end of the telescopic rod 703. A clamping block 7031 is fixed to the other end of the telescopic rod 703. A nut sleeve 7032 is attached to the clamping block 7031, which engages with a threaded rod on the stator assembly. Specifically, the telescopic rod 703 is a hydraulic cylinder 703. The extension rod 702 is hingedly connected to the barrel end of the hydraulic cylinder 703. The piston rod end of the hydraulic cylinder 703 is fixed with a clamping block 7031. When the piston rod of the hydraulic cylinder 703 is extended, it pushes the stator assembly to fine-tune the alignment, thereby correcting stator deviation and improving stator assembly accuracy.

[0027] Reference Figure 3 The support ring 3 includes a ring plate 301, an inner ring portion 302 and an outer ring portion 303. The inner ring portion 302 and the outer ring portion 303 are connected by the ring plate 301, and a plurality of reinforcing plates 304 are provided between the inner ring portion 302 and the outer ring portion 303; a plurality of sleeves 305 are fixed on the side of the inner ring portion 302, and the support leg 4 includes a screw portion 401 and a support portion 402. The screw portion 401 and the support portion 402 are integrally connected, and the screw portion 401 of the support leg 4 passes through the side of the inner ring portion 302 and is arranged in the sleeve 305. Adjustment nuts 403 are provided at both ends of the sleeve 305, and the adjustment nuts 403 are screwed on the screw portion 401 of the support leg 4; in this way, by rotating the adjusting nut 403 and the screw portion 401 of the support leg 4, the extension distance of the support portion 402 of the support leg 4 can be conveniently adjusted, thereby conveniently adjusting the inclination degree of the rotor 10.

[0028] Reference Figure 1A cantilever crane 8 is provided next to the support ring 3, and the cantilever crane 8 includes a column 801, a cantilever 802 and a rotary drive device 803. The column 801 passes through the assembly workbench 1 and the insulating plate 2, and the bottom end of the column 801 is fixed to the ground by an anchor bolt; the cantilever 802 is connected to the upper end of the column 801 through the rotary drive device 803 and is located above the assembly workbench 1; the assembly workbench 1 is also provided with a wiring bracket 9 that cooperates with the cantilever crane 8; the rotary drive device 803 is an existing known technology; the stator, rotor 10 and other components can all be lifted to the vertical assembly platform for assembly by the cantilever crane 8.

[0029] The above-mentioned vertical assembly platform for the stator and rotor of a wind turbine generator operates as follows:

[0030] Reference Figure 1 and Figure 4 , the main shaft is hoisted onto the assembly base 5 by the cantilever crane 8 and positioned by the locating pin 6; then the stator is hoisted and assembled with the main shaft, and the degree of deviation of the stator is detected by instruments such as distance meters, and the stator components are pushed by the fine-tuning mechanism 7 to fine-tune the concentricity so that the stator and the main shaft are coaxial; after the stator is assembled, the rotor 10 is hoisted for assembly, and the degree of inclination of the rotor 10 is detected by instruments such as distance meters, and the rotor 10 is adjusted by the support feet 4 on the inner ring surface of the support ring 3, and the position is aligned so that it is horizontal, and the rotor 10 is fixed radially, and then other components such as bearings, retaining rings, and end pieces are assembled.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertical assembly platform for a wind turbine stator and rotor, characterized by: It comprises an assembled workbench (1), an insulating plate (2), a support ring (3), a support leg (4), an assembled base (5), a positioning pin (6) and a fine-tuning mechanism (7); An insulating plate (2) is laid on the assembly workbench (1), a circular hole is opened in the middle of the insulating plate (2), a support ring (3) is provided in the circular hole, the support ring (3) is placed on the assembly workbench (1), and the assembly workbench (1) below the inner circle of the support ring (3) passes through; a plurality of supporting legs (4) are provided on the inner ring surface of the support ring (3); The assembled base (5) is arranged below the support ring (3), and a plurality of positioning pins (6) are provided in a circular array on the assembled base (5); a fine adjustment mechanism (7) is also provided on the assembled base; The fine-tuning mechanism (7) comprises a sleeve (701), an extension rod (702), a telescopic rod (703), a clamping block (7031) and a nut sleeve (7032); the sleeve (701) is fixedly connected to the assembled base (5); one end of the extension rod (702) is inserted into the sleeve (701); the other end of the extension rod (702) is hinged to one end of the telescopic rod (703); the other end of the telescopic rod (703) is fixed with a clamping block (7031), and the clamping block (7031) is connected to the nut sleeve (7032); The support ring (3) comprises a ring plate (301), an inner ring portion (302) and an outer ring portion (303), wherein the inner ring portion (302) and the outer ring portion (303) are connected via the ring plate (301), and a plurality of reinforcing plates (304) are provided between the inner ring portion (302) and the outer ring portion (303); a plurality of sleeves (305) are fixed on the side surface of the inner ring portion (302), and the support leg (4) comprises a screw portion (401) and a support portion (402), wherein the screw portion (401) and the support portion (402) are integrally connected, and the screw portion (401) of the support leg (4) passes through the side surface of the inner ring portion (302) and is provided in the sleeve (305), and an adjusting nut (403) is provided at both ends of the sleeve (305), and the adjusting nut (403) is screwed on the screw portion (401) of the support leg (4).

2. A vertical assembly platform for a wind turbine stator and rotor according to claim 1, characterized in that: A cantilever crane (8) is also provided next to the support ring (3), and the cantilever crane (8) includes a column (801), a cantilever (802) and a rotary drive device (803). The column (801) passes through the assembly workbench (1) and the insulating plate (2), and the bottom end of the column (801) is fixed to the ground by anchor bolts; the cantilever (802) is connected to the upper end of the column (801) by the rotary drive device (803) and is located above the assembly workbench (1); the assembly workbench (1) is also provided with a wiring bracket (9) that cooperates with the cantilever crane (8).

3. The vertical assembly platform for the stator and rotor of a wind turbine according to claim 1, characterized in that: The assembly workbench (1) is a frame structure. A plurality of pillars (101) are connected below the assembly workbench (1). Guardrails (102) are also provided around the assembly workbench (1).

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