Permanent magnet generator stator and rotor relative position maintaining and adjusting tool

Abstract

The utility model relates to a permanent magnet generator stator and rotor relative position maintaining and adjusting tool comprising a rotor fixing seat comprising a first cylinder section, one end of the first cylinder section is provided with a first annular end plate extending outwards along the circumferential direction, and the other end is provided with a second annular end plate extending inwards along the circumferential direction; the stator fixing seat comprises a second cylinder section sleeved on the outer wall of the first cylinder section; a plurality of fixing parts extending outwards in the circumferential direction are arranged at the end, facing the first annular end plate, of the second cylinder section; the front-back adjusting bolt group penetrates through the first annular end plate and abuts against the stator fixing seat; and the rotation adjusting mechanism is arranged on the first annular end plate and is used for driving the rotor fixing seat to rotate. Compared with the prior art, when the gear box and the generator are both in a horizontal state, the assembling of the generator and the gear box is directly completed, and the requirements for rotation and front-back position adjustment of a generator rotor in the butt joint process are met.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet generators, in particular to a relative position maintaining and adjusting tool for a stator and a rotor of a permanent magnet generator. Background Art

[0002] Permanent magnet wind turbine generator sets are mainly composed of blades, gearboxes and generators; wind drives the blades to rotate, and the blade shaft changes speed through the gearbox, driving the generator rotor to rotate, thereby generating electricity. Currently in the field of wind power generation, the docking installation of permanent magnet generators and gearboxes is mostly done in a vertical state.

[0003] Patent CN201910742012.4 discloses a stator rotor set device for a direct-drive permanent magnet wind turbine, including: a base, a guide column, a fixed axis support device, a rotor limit mechanism, a guide shaft and a guide sleeve; the base includes a bottom plate and a transition connection plate, the bottom plate is truncated, and a transition connection plate is provided in the middle of the upper end surface of the bottom plate; the guide column includes a guide rail and an upper connection bracket, the upper end surface of the upper connection bracket is provided with a guide rail, one end of the upper connection bracket is fixed on the transition connection plate, and the other end is fixed to the bottom plate by a connecting bolt; the fixed axis support device radially positions the fixed axis; the guide shaft sleeve is arranged on the fixed axis, and the fixed axis is assembled and connected with the stator; the guide sleeve is connected with the rotor, and the rotor and the stator are aligned by sleeve-arranging the guide sleeve on the guide shaft. This patent is an integral vertical assembly. After the assembly is completed, it needs to be turned over as a whole, requiring the workshop infrastructure to meet the capacity of hoisting more than 150t, and the vertical space to meet.

[0004] Patent CN202310024290.2 discloses an assembly method for a large permanent magnet wind semi-direct drive generator, which solves the problem of how to assemble the stator and rotor of the generator to the horizontal gearbox; it belongs to the technical field of wind turbines, and adopts a method of simulating the output shaft side housing of the gearbox to truly simulate an installation environment where the gearbox is placed vertically. After the stator and rotor of the generator are assembled vertically, the vertical assembly guide end cover is installed on the top of the stator and rotor assembled vertically, and the stator and rotor assembled vertically are fixedly connected into a whole with the end cover, and the clearance between the stator and rotor is ensured. After turning it over, it is docked with the horizontal gearbox, thereby overcoming the difficulty of horizontally assembling the stator and rotor of the generator, and realizing the horizontal docking of the generator and the gearbox, meeting the requirements of horizontal installation of the gearbox. The patent needs to completely and truly simulate an installation environment where the gearbox is placed vertically. After the vertical assembly is completed, the stator and rotor assembled vertically are fixedly connected into a whole, and then the generator is turned over to the horizontal state to dock the gearbox. The docking process is fixed and cannot be adjusted. Utility Model Content

[0005] The purpose of the utility model is to provide a relative position adjustment tool for the stator and rotor of a permanent magnet generator in order to overcome at least one of the defects of the above-mentioned prior art. The utility model solves the problem of directly completing the assembly of the generator and the gearbox when both the gearbox and the generator are in a horizontal state, and meets the needs of rotating the generator rotor and adjusting the front and rear position during the docking process.

[0006] Compared with patent CN201910742012.4, the utility model adopts overall horizontal assembly, and is ready for delivery after the horizontal assembly is completed, which significantly reduces the infrastructure requirements for the workshop. Compared with patent CN202310024290.2, the utility model can realize the rotation adjustment and front and rear position adjustment of the generator rotor during the docking process, and can be used in a variety of scenarios.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A relative position maintaining and adjusting tool for a permanent magnet generator stator and rotor, wherein the stator and rotor are arranged horizontally, and the rotor is located inside the stator, and the tool comprises:

[0009] The rotor fixing seat comprises a first cylindrical section, one end of which is provided with a first annular end plate extending outwardly along its circumference, and the other end of which is provided with a second annular end plate extending inwardly along its circumference; the second annular end plate is fixedly connected to the rotor;

[0010] The stator fixing seat comprises a second cylindrical section sleeved on the outer wall of the first cylindrical section; one end of the second cylindrical section facing the first annular end plate is provided with a plurality of fixing parts extending outwardly along the circumference thereof, and the fixing parts are fixedly connected to the stator;

[0011] A front-to-back adjustment bolt group, which passes through the first annular end plate and abuts against the stator fixing seat, and the front-to-back adjustment of the rotor relative to the stator is achieved by rotating the front-to-back adjustment bolt group;

[0012] The rotation adjustment mechanism is arranged on the first annular end plate and is used to drive the rotation of the rotor fixing seat, thereby driving the rotor to rotate and completing the phase adjustment of the rotor.

[0013] Furthermore, a wear-resistant layer is provided between the first cylindrical section and the second cylindrical section to isolate the two.

[0014] Furthermore, the tolerances of the first cylindrical section, the second cylindrical section and the wear-resistant layer therebetween are closely matched.

[0015] Furthermore, a locking and fixing bolt group is provided between the first annular end plate and the second cylindrical section for connecting the two. In order to prevent collision between the stator and the rotor during transportation, when the position between the stator and the rotor needs to be adjusted, the locking and fixing bolt group is removed to release the locking relationship between the stator and the rotor.

[0016] Furthermore, the first annular end plate is provided with transverse waist-shaped bolt through holes matching the bolts in the locking and fixing bolt group, so as to facilitate the locking between the second annular end plate and the second cylindrical section.

[0017] Furthermore, the bolts in the locking and fixing bolt group and the bolts in the front and rear adjusting bolt groups are arranged alternately.

[0018] Furthermore, the rotation adjustment mechanism includes a reducer, a T-type screw and a handwheel; a first mounting plate and a second mounting plate are provided on the first annular end plate; one end of the T-type screw is mounted on the first mounting plate, and the other end is mounted on the second mounting plate; the end of the T-type screw mounted on the first mounting plate is connected to the reducer, and the handwheel is connected to the reducer, and the handwheel drives the reducer to rotate the T-type screw.

[0019] Furthermore, there are multiple rotation adjustment mechanisms and they are evenly distributed on the second annular end plate along the circumferential direction.

[0020] Furthermore, a reinforcing rib is provided at the connection between the second cylindrical section and the fixing portion to enhance the strength of the structure there.

[0021] Furthermore, the second annular end plate is connected to the rotor via bolts; and the fixing portion is connected to the stator via bolts.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (1) The utility model provides a tool for maintaining and adjusting the relative position of the stator and rotor of a permanent magnet generator, which can complete the docking of a gear box and a large permanent magnet generator in a horizontal state; the tool of the utility model has two major functions of rotation adjustment and front and rear adjustment, which meets the working conditions in a horizontal state.

[0024] (2) The utility model provides a tool for maintaining and adjusting the relative position of the stator and rotor of a permanent magnet generator, the structural strength of which overcomes the influence of the magnetic pull between the stator and the rotor and the gravity of the rotor.

[0025] (3) The utility model provides a tool for maintaining and adjusting the relative position of the stator and rotor of a permanent magnet generator. A wear-resistant layer is designed between the rotor fixing seat and the stator fixing seat of the tool for isolation, thereby reducing the wear of the rotor fixing seat and the stator fixing seat after long-term use.

[0026] (4) The utility model provides a tool for maintaining and adjusting the relative position of the stator and rotor of a permanent magnet generator. The rotation adjustment mechanism of the tool is driven by a reducer and a screw, and can be manually driven and adjusted. It also has a self-locking function to avoid rotation or displacement during operation.

[0027] (5) The utility model provides a relative position maintaining and adjusting tool for the stator and rotor of a permanent magnet generator, which can complete the docking operation between the generator and the gearbox under the condition that there are restrictions on infrastructure conditions such as factory buildings and cranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a relative position maintaining and adjusting tool for the stator and rotor of a permanent magnet generator in an embodiment;

[0029] Figure 2 It is a side view of the relative position maintaining and adjusting tooling of the stator and rotor of the permanent magnet generator in the embodiment;

[0030] Figure 3 It is a schematic diagram of assembling a generator and a gearbox by using a permanent magnet generator stator and rotor relative position maintaining and adjusting tool in an embodiment;

[0031] Figure 4 is a schematic diagram of a rotation adjustment mechanism in an embodiment;

[0032] As shown in the figure: 1-front and rear adjustment bolt group; 2-locking and fixing bolt group; 3-rotation adjustment mechanism; 4-stator fixing seat; 41-second cylindrical section; 42-fixing part; 5-rotor fixing seat; 51-first cylindrical section; 52-first annular end plate; 53-second annular end plate; 7-transverse waist bolt through hole; 8-handwheel; 9-reinforcement rib; 10-first mounting plate; 11-second mounting plate; 12-T-type screw rod; 13-reducer; a-gear box; b-stator; c-rotor. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0034] Example

[0035] See also Figure 1-3 , a relative position maintaining and adjusting tool for a permanent magnet generator stator and rotor, wherein the stator and rotor are arranged horizontally, and the rotor is located inside the stator, and the tool comprises:

[0036] The rotor fixing seat 5 comprises a first cylindrical section 51, wherein one end of the first cylindrical section 51 is provided with a first annular end plate 52 extending outwardly along the circumference thereof, and the other end is provided with a second annular end plate 53 extending inwardly along the circumference thereof; the second annular end plate 53 is fixedly connected to the rotor, preferably by bolts;

[0037] The stator fixing seat 4 comprises a second cylindrical section 41 sleeved on the outer wall of the first cylindrical section 51; a plurality of fixing portions 42 extending outwardly along the circumferential direction of the second cylindrical section 41 are provided at one end thereof facing the first annular end plate 52, and the fixing portions 42 are fixedly connected to the stator, preferably by bolts; wherein a reinforcing rib 9 is provided at the connection between the second cylindrical section 41 and the fixing portions 42, so as to enhance the strength of the structure therein;

[0038] The front-to-back adjustment bolt group 1 passes through the first annular end plate 52 and abuts against the stator fixing seat 4. By rotating the front-to-back adjustment bolt group 1, the front-to-back adjustment of the rotor relative to the stator is achieved;

[0039] The rotation adjustment mechanism 3 is disposed on the first annular end plate 52 and is used to drive the rotor fixing seat 5 to rotate, thereby driving the rotor to rotate and completing the phase adjustment of the rotor.

[0040] See also Figure 2 In this embodiment, a wear-resistant layer 6 is provided between the first cylindrical section 51 and the second cylindrical section 41 to isolate the two. The material of the wear-resistant layer 6 is preferably copper. The first cylindrical section 51, the second cylindrical section 41 and the wear-resistant layer 6 located therebetween are closely matched in tolerance.

[0041] See also Figure 1 , 2 In this embodiment, a locking and fixing bolt group 2 for connecting the first annular end plate 52 and the second cylindrical section 41 is provided between the two. The stator and rotor are prone to collision during transportation, resulting in collision injuries. The first annular end plate 52 and the second cylindrical section 41 are locked by the locking and fixing bolt group 2, and then the rotor and the stator are locked; when the position between the stator and the rotor needs to be adjusted, the locking and fixing bolt group 2 is unlocked and then adjusted.

[0042] See also Figure 1 In this embodiment, the first annular end plate 52 is provided with transverse waist-shaped bolt through holes 7 matching the bolts in the locking and fixing bolt group 2 to facilitate locking between the second annular end plate 53 and the second cylindrical section 41 .

[0043] See also Figure 1 In this embodiment, the bolts in the locking and fixing bolt group 2 and the bolts in the front and rear adjusting bolt group 1 are arranged alternately.

[0044] See also Figure 4In this embodiment, the rotation adjustment mechanism 3 includes a reducer 13, a T-type screw rod 12 and a handwheel 8; a first mounting plate 10 and a second mounting plate 11 are provided on the first annular end plate 52; one end of the T-type screw rod 12 is mounted on the first mounting plate 10, and the other end is mounted on the second mounting plate 11; the end of the T-type screw rod 12 mounted on the first mounting plate 10 is connected to the reducer 13, and the handwheel 8 is connected to the reducer 13, and the handwheel 8 drives the reducer 13 to rotate the T-type screw rod 12.

[0045] Docking installation process of permanent magnet generator and gearbox:

[0046] like Figure 3 As shown, during the docking process, the gearbox a is in a horizontal position, so the generator also needs to be in a horizontal position before docking can be performed. The first cylindrical section 51 of the rotor fixing seat 5 is connected to the rotor c with bolts, and the second cylindrical section 41 of the stator fixing seat 4 is connected to the stator b with bolts. Under the action of the tooling provided in this embodiment, the stator b and the rotor c of the generator are connected into an integral state. When the generator is placed horizontally, the rotor fixing seat 5 and the stator fixing seat 4, as well as the wear-resistant layer 6 therebetween, are tightly matched with each other to overcome the magnetic pull between the stator b and the rotor c, and ensure that the air gap between the rotor c and the stator b is within the allowable range.

[0047] During the docking process, the phase of the rotor c and the gear box a is adjusted by the rotation adjustment mechanism 3. The rotation adjustment mechanism 3 uses the reducer and T-type screw for assistance. The operator can drive the rotation of the rotor fixing seat 5 by rotating the handwheel 8. The rotor fixing seat 5 drives the rotor c to rotate, completing the phase adjustment of the rotor c, thereby matching the phase of the gear box.

[0048] When connecting with the gearbox, it is necessary to ensure that the stator b is connected to the gearbox a first, and then the rotor c is connected to the gearbox a. The front and rear adjustment bolt group 1 of this tooling can be used to adjust the front and rear position of the rotor c to avoid contact before the stator b and the gearbox a are connected.

[0049] When the tooling provided in this embodiment performs rotation adjustment and front-back adjustment on the rotor C, the strength of the tooling ensures that the horizontality and verticality of the rotor C can be maintained while overcoming the magnetic pull. The tooling can be used to adapt to various working conditions that occur during the horizontal docking of the generator and the gearbox a, and can be adjusted to complete the docking of the generator and the gearbox a in a horizontal state.

[0050] Compared with the prior art, the tooling provided in this embodiment can be used to assemble a transmission chain with a total weight of more than 150t when there is only a 100t crane in the workshop. At this time, the vertical assembly cannot be turned over. With this tooling, the overall docking can be completed in the horizontal state of the gearbox a. After the docking is completed, it can directly enter the shipping state.

[0051] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A tool for maintaining and adjusting the relative position of a stator and a rotor of a permanent magnet generator, wherein the stator and the rotor are arranged horizontally, and the rotor is located inside the stator. It is characterized in that The tooling includes: A rotor fixing seat (5), comprising a first cylindrical section (51), one end of the first cylindrical section (51) being provided with a first annular end plate (52) extending outwardly along its circumference, and the other end of the first cylindrical section (51) being provided with a second annular end plate (53) extending inwardly along its circumference; the second annular end plate (53) being fixedly connected to the rotor; A stator fixing seat (4), comprising a second cylindrical section (41) sleeved on the outer wall of the first cylindrical section (51); one end of the second cylindrical section (41) facing the first annular end plate (52) is provided with a plurality of fixing portions (42) extending outwardly along its circumferential direction, and the fixing portions (42) are fixedly connected to the stator; A front-to-back adjustment bolt group (1) passes through the first annular end plate (52) and abuts against the stator fixing seat (4), and the front-to-back adjustment of the position of the rotor relative to the stator is achieved by rotating the front-to-back adjustment bolt group (1); The rotation adjustment mechanism (3) is arranged on the first annular end plate (52) and is used to drive the rotor fixing seat (5) to rotate, thereby driving the rotor to rotate and completing the phase adjustment of the rotor.

2. A permanent magnet generator stator and rotor relative position maintaining and adjusting tool according to claim 1, It is characterized in that A wear-resistant layer (6) is provided between the first cylindrical section (51) and the second cylindrical section (41) to isolate the two.

3. A relative position maintaining and adjusting tool for a permanent magnet generator stator and rotor according to claim 2, It is characterized in that The first cylindrical section (51), the second cylindrical section (41) and the wear-resistant layer (6) located therebetween are closely matched in tolerance.

4. A permanent magnet generator stator and rotor relative position maintaining and adjusting tool according to claim 1, It is characterized in that A locking and fixing bolt group (2) for connecting the first annular end plate (52) and the second cylindrical section (41) is provided between the two.

5. A relative position maintaining and adjusting tool for a permanent magnet generator stator and rotor according to claim 4, It is characterized in that The first annular end plate (52) is provided with transverse waist-shaped bolt through holes (7) matching the inner bolts of the locking and fixing bolt group (2).

6. A permanent magnet generator stator and rotor relative position maintaining and adjusting tool according to claim 4, It is characterized in that The bolts in the locking and fixing bolt group (2) and the bolts in the front and rear adjusting bolt group (1) are arranged alternately.

7. A permanent magnet generator stator and rotor relative position maintaining and adjusting tool according to claim 1, It is characterized in that The rotation adjustment mechanism (3) comprises a reducer (13), a T-shaped screw rod (12) and a hand wheel (8); The first annular end plate (52) is provided with a first mounting plate (10) and a second mounting plate (11); One end of the T-shaped screw rod (12) is mounted on the first mounting plate (10), and the other end is mounted on the second mounting plate (11); The end of a T-shaped screw rod (12) mounted on the first mounting plate (10) is connected to a reducer (13), a hand wheel (8) is connected to the reducer (13), and the hand wheel (8) drives the reducer (13) to rotate the T-shaped screw rod (12).

8. A tool for maintaining and adjusting the relative position of a stator and a rotor of a permanent magnet generator according to claim 1, It is characterized in that There are a plurality of the rotation adjustment mechanisms (3) which are evenly distributed along the circumferential direction on the second annular end plate (53).

9. A permanent magnet generator stator and rotor relative position maintaining and adjusting tool according to claim 1, It is characterized in that A reinforcing rib (9) is provided at the connection between the second cylindrical section (41) and the fixing portion (42).

10. A relative position maintaining and adjusting tool for a permanent magnet generator stator and rotor according to claim 1, It is characterized in that The second annular end plate (53) is connected to the rotor via bolts; and the fixing portion (42) is connected to the stator via bolts.

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