An assembly device and method for an electrical generator

Abstract

The application relates to a generator assembling device and an assembling method, and the generator assembling device comprises a slow descent driving unit which comprises a mounting base plate, an anti-rotation assembly, a slow descent piece and a slow descent control assembly; the anti-rotation assembly is arranged on the mounting base plate, one end of the slow descent piece is connected with the anti-rotation assembly, and the slow descent piece is arranged in an extending mode along a height direction; the slow descent control assembly is rotationally connected with the slow descent piece; a stator guiding unit comprises a pushing suspension piece, a stator shell assembly and a guiding assembly; the stator shell assembly comprises a stator shell, an upper end cover and a lower end cover, the upper end cover and the lower end cover are arranged at two ends of the stator shell respectively, and the lower end cover is detachably connected with the stator shell; and a stator is pre-installed in the stator shell. The application can solve the problem that the permanent magnet generator (especially the shaftless generator) is prone to be inclined and scraped due to strong magnetic attraction and a single-end cantilever state of a rotor during an assembling process, the generator assembling device has the advantages of compact structure, convenient operation, high universality and cost advantage.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing and assembly technology, and in particular to a generator assembly device and assembly method. Background Technology

[0002] In the manufacturing and R&D process of various small permanent magnet generators, the assembly stage affects the final performance and reliability of the product. For small permanent magnet generators with a central through-type shaftless structure, the assembly difficulty is usually high. The rotor of this type of motor is hollow ring-shaped or cylindrical, without a traditional central drive shaft. The working air gap between the stator and rotor is often designed to be at the millimeter level to maximize magnetic flux density and power density. However, before the stator and rotor are fully fitted together, the array of permanent magnets (usually high-performance neodymium iron boron material) densely distributed on the inner or outer wall of the rotor will generate extremely strong asymmetric magnetic attraction between the stator core and windings. This magnetic attraction not only manifests as radial lateral pulling but also includes an axial traction component, and its amplitude is often several times the rotor's own weight, increasing exponentially as the gap decreases. In existing technologies, generators are assembled using conventional and simple tooling. Alternatively, large-scale automated assembly equipment can also be used to assemble generators.

[0003] However, the shortcomings of existing technologies lie in the fact that existing tooling lacks a stable descent mechanism and concentric guidance throughout the process. At the moment of stator-rotor fitting, the rotor is prone to violent eccentric adsorption, which can easily damage the inner wall of the stator and bearings. If the motor application scenario has an isolation cover, it is very easy to scratch the fragile isolation cover, and it also poses a threat to the safety of operators. In addition, since the rotor of the shaftless generator can often only be in a cantilever beam state with one end fixed in the early stage of assembly, the lack of top limit further aggravates the risk of skew jamming, resulting in low overall assembly yield and high rework rate. While large-scale automated assembly settings are stable, they are expensive and bulky, making it difficult to meet the requirements of scientific research experiments or lightweight production lines for convenience and low cost. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a generator assembly device and assembly method to solve the problem that the strong magnetic attraction and the single-end cantilever state of the rotor can easily cause skew and scraping during the assembly of permanent magnet generators (especially shaftless generators). Furthermore, the generator assembly device has a compact structure, convenient operation, strong versatility, can smoothly overcome magnetic attraction and achieve high-precision concentric guidance, has economic cost advantages, and can flexibly adapt to generators of various specifications and models.

[0005] To solve the above-mentioned technical problems, the present invention provides a generator assembly device for assembling a generator, the generator including a stator and a rotor, the generator assembly device including, A slow-descent drive unit includes a mounting base, an anti-rotation component, a slow-descent member, and a slow-descent control component; the anti-rotation component is disposed on the mounting base, one end of the slow-descent member is connected to the anti-rotation component, and the slow-descent member extends along the height direction; the slow-descent control component is rotatably connected to the slow-descent member. A stator guide unit includes a push-and-hover component, a stator housing assembly, and a guide assembly. The stator housing assembly includes a stator housing, an upper end cover, and a lower end cover. The upper end cover and the lower end cover are respectively disposed at both ends of the stator housing, and the lower end cover is detachably connected to the stator housing. The stator is pre-installed inside the stator housing. The guide assembly is disposed along the height direction of the stator housing to guide and limit the movement of the stator housing assembly. The push-and-hover component is connected to the upper end cover and cooperates with the descent component. The rotor support unit includes an inner rotor assembly and a concentric guide assembly, wherein the concentric guide assembly presses and positions the inner rotor assembly; the lower end cover is fixedly assembled to the mounting base plate, the inner rotor assembly is nested in the lower end cover, and the concentric guide assembly is sleeved on the deceleration member and inserted into one end of the inner rotor assembly; During assembly, the slow-descent control assembly is rotated to lower the stator housing assembly, while the concentric guide assembly slides to the upper cover to provide double-end support for the inner rotor assembly along the height direction.

[0006] In one embodiment of the present invention, the descent control component is configured as a descent screw; the descent control assembly includes a hovering support nut and a descent control handwheel, the hovering support nut being coaxially embedded in the descent control handwheel, and the hovering support nut being screwed to the descent screw.

[0007] In one embodiment of the present invention, the mounting base plate is provided with an anti-rotation limiting groove in the middle, the anti-rotation limiting groove is matched with the anti-rotation component, and the anti-rotation component is snapped into the anti-rotation limiting groove; the end of the descent member is screwed into the anti-rotation component for fixation, forming a rigid guide along the height direction.

[0008] In one embodiment of the present invention, the inner rotor assembly includes an isolation cover, an upper bearing, and a lower bearing. The rotor is housed in the isolation cover. The upper bearing and the lower bearing are respectively disposed at the ends of the isolation cover and connected to the rotor. The isolation cover is connected to the sleeve portion of the lower end cover. The lower end cover is provided with a bearing boss to position the lower bearing.

[0009] In one embodiment of the present invention, the lower end cover is provided with a sleeve portion and a bearing boss, and the isolation cover is fixed to the sleeve portion; the bearing boss is connected to the lower bearing to position the lower bearing.

[0010] In one embodiment of the present invention, the concentric guide assembly includes an upper body, a lower body, and a central hole. The upper body and the lower body are coaxially arranged, and the central hole is disposed through the upper body and the lower body. The descent member passes through the central hole. The diameter of the upper body is larger than that of the lower body. The lower body cooperates with the inner rotor assembly for concentric positioning.

[0011] In one embodiment of the present invention, the flange fixing hole of the push-up suspension member is opposite to the top threaded hole of the upper end cover, and the push-up suspension member is assembled to the top end face of the upper end cover by fasteners.

[0012] In one embodiment of the present invention, the end face of the push-and-hover member is provided with a mounting hole, and the descent member passes through the mounting hole.

[0013] In one embodiment of the present invention, the guiding assembly includes a plurality of guide rods spaced circumferentially along the inner rotor assembly, and the plurality of guide rods are arranged vertically within the stator housing; the plurality of guide rods correspond one-to-one with the lower end cover guide hole located on the lower end cover and the support limiting hole located on the overhead support assembly along the height direction.

[0014] The present invention also provides a generator assembly method, which uses a generator assembly device as described above to assemble the stator and rotor of a generator. The generator assembly method includes, Step S1: Rotate the slow descent control component to make the stator descend smoothly along the slow descent component. As the concentric guide component slides into the upper cover, the force on the inner rotor assembly changes from a single-end vertical cantilever state to a double-end support state. Step S2: When the stator housing assembly is fully fitted with the end face of the lower end cover, so that the stator and rotor are concentrically covered, remove the push-hovering component, remove the concentric guide assembly, and replace the guide assembly with generator fasteners in sequence to complete the overall assembly.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: The generator assembly device of this invention includes a descent drive unit, a stator guide unit, and a rotor support unit. The mounting base of the descent drive unit is fixedly equipped with a vertical descent component. The inner rotor assembly is vertically fixedly mounted on the mounting base, and the top end of the rotor is limited by a concentric guide assembly fitted onto the descent component. The stator guide unit passes through the descent component and, in conjunction with the guide assembly, achieves vertical movement limitation. During assembly, rotating the descent control handwheel causes the stator assembly to overcome magnetic attraction and descend smoothly. The concentric guide assembly slides into the upper stator cover, instantly transforming the rotor into a stable double-end support state. Using the generator assembly device of this invention… This invention enables high-precision, non-destructive concentric fitting of the stator and rotor, thereby improving the assembly qualification rate. It provides adjustable damping descent capability throughout the fitting stroke to flexibly suppress sudden changes in magnetic attraction. During the relative movement of the stator and rotor, it maintains high-precision concentric guiding constraints throughout, eliminating sway at the cantilever end. Furthermore, the generator assembly device of this invention is easy to assemble and disassemble, convenient to operate, and has a certain degree of compatibility with different frame models. This solves the problems of skewing and scraping caused by strong magnetic attraction and the single-end cantilever state of the rotor during the assembly of permanent magnet generators (especially shaftless generators), as well as the problems of unstable generator assembly quality and high assembly costs. The generator assembly device of this invention utilizes the hollow structure of the shaftless generator rotor, introducing a descent damping component and a descent control component that works in conjunction with the damping component. This transforms the uncontrollable strong magnetic attraction into a smooth and stable mechanical descent thrust, eliminating the risk of scratching of the isolation cover and damage to components caused by the instantaneous attraction between the stator and rotor. Furthermore, the dual limiting design, combining a central concentric guide assembly with peripheral circumferential auxiliary guide rods, instantly transforms the rotor from a cantilever beam stress state to a double-end supported state during stator descent, ensuring absolute concentricity throughout the entire stroke. In addition, during the disassembly and fixing stages, a one-for-one guide rod replacement strategy effectively avoids relative displacement during assembly handover, ensuring the stability and consistency of the assembly. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0018] Figure 2 This is an exploded view of the stator housing assembly according to a preferred embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the push-and-hover component according to a preferred embodiment of the present invention.

[0020] Figure 4This is a schematic diagram of the structure of the guide assembly, mounting base plate, stator, inner rotor integration, descent device and descent control assembly cooperating with each other in a preferred embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the stator and stator spacer according to a preferred embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the concentric guide assembly according to a preferred embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of one of the supports of the overhead support assembly according to a preferred embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the overall structural assembly process of a preferred embodiment of the present invention.

[0025] Figure 9 This is a first-view schematic diagram of the stator housing according to a preferred embodiment of the present invention.

[0026] Figure 10 This is a second-view schematic diagram of the stator housing according to a preferred embodiment of the present invention.

[0027] Figure 11 This is a schematic diagram of the mounting base plate, overhead support assembly, and rotor support unit according to a preferred embodiment of the present invention.

[0028] Figure 12 This is a schematic diagram of the structure of the descent device and the mounting base plate in a preferred embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of the structure of the concentric guide assembly according to a preferred embodiment of the present invention.

[0030] Figure 14 This is a schematic diagram of the assembly process of a preferred embodiment of the present invention.

[0031] Figure 15 This is a cross-sectional view of the overall structure of the generator assembly device according to a preferred embodiment of the present invention.

[0032] Explanation of reference numerals on the accompanying drawings: 100. Stator; 101. Rotor; 1. Descent drive unit; 10. Overhead support assembly; 102. Support limiting hole; 11. Install the substrate; 12. Anti-rotation component; 13. Soft landing device; 14. Descent control assembly; 140. Hover support nut; 141. Descent control handwheel; 2. Stator guiding unit; 20. Push-and-hover component; 201. Center mounting hole; 202. Fixing hole; 21. Stator housing assembly; 210. Stator housing; 2100. Upper connecting hole; 2101. Lower connecting hole; 211. Upper end cover; 2110. Top threaded hole; 2111. Housing connecting hole; 212. Lower end cover; 2120. Sleeve part; 2121. Bearing boss; 2122. Lower end cover guide hole; 22. Guide assembly; 23. Stator spacer; 3. Rotor support unit; 30. Inner rotor assembly; 300. Isolation cover; 301. Upper bearing; 302. Lower bearing; 31. Concentric guide assembly; 310. Upper body; 311. Lower body; 312. Center hole. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example 1

[0034] Reference Figures 1 to 15 As shown, the present invention discloses a generator assembly device for assembling a generator, the generator including a stator 100 and a rotor 101.

[0035] The generator assembly includes a descent drive unit 1, which includes an overhead support assembly 10, a mounting base plate 11, an anti-rotation assembly 12, a descent component 13, and a descent control assembly 14. The overhead support assembly 10 is assembled at the bottom of the mounting base plate 11 to support the mounting base plate; The anti-rotation component 12 is disposed at the center of the mounting base plate 11, one end of the descent member 13 is connected to the anti-rotation component 12, the descent member 13 extends along the height direction to provide rigid guidance along the height direction; the descent control component 14 is rotatably connected to the descent member 13. The generator assembly device also includes a stator guide unit 2, which is a moving part that is suspended and performs a slow-descent assembly action. The stator guide unit 2 includes a push-suspending part 20, a stator housing assembly 21, and a guide assembly 22. The stator housing assembly 21 includes a stator housing 210, an upper end cover 211, and a lower end cover 212. The stator housing 210 has a receiving cavity inside. The upper end cover 211 and the lower end cover 212 are respectively disposed at both ends of the stator housing 210, and the lower end cover 212 is detachably connected to the stator housing 210. The stator 100 is pre-installed in the receiving cavity of the stator housing 210 and is fixedly connected to the stator housing 210. In detail, the stator housing 210 has an upper connecting hole 2100, through which the stator housing 210 is connected to the upper end cover 211; the stator housing 210 also has a lower connecting hole 2101, through which the stator housing 210 is connected to the lower end cover 212.

[0036] The guide assembly 22 is disposed on the stator housing 210 along the height direction to guide and limit the movement of the stator housing assembly 21; the push-stop component 20 is connected to the upper end cover 211; the push-stop component 20 has a central mounting hole 201, and the push-stop component 20 cooperates with the descent component 13 through the central mounting hole 201; The generator assembly device further includes a rotor support unit 3, which includes an inner rotor assembly 30 and a concentric guide assembly 31. The concentric guide assembly 31 presses and positions the inner rotor assembly 30. The lower end cover 212 is fixedly assembled to the mounting base plate 11, and the inner rotor assembly 30 is nested in the lower end cover 212. The concentric guide assembly 31 is connected to the descent member 13 and inserted into the top of the inner rotor assembly 30. During assembly, the slow-descent control component 14 is rotated to lower the stator housing assembly 21, while the concentric guide component 31 slides to the upper end cover 211 to provide double-end support for the inner rotor assembly 30 along the height direction.

[0037] Therefore, it can be understood that the generator assembly device protected by this invention includes a descent drive unit, a stator guide unit, and a rotor support unit. The mounting base of the descent drive unit is fixedly equipped with a vertical descent component. The inner rotor assembly is vertically fixedly mounted on the mounting base, and the rotor's top end is limited by a concentric guide assembly fitted onto the descent component. The stator guide unit passes through the descent component and, in conjunction with the guide assembly, achieves vertical movement limitation. During assembly, rotating the descent control handwheel causes the stator assembly to overcome magnetic attraction and descend smoothly. The concentric guide assembly slides into the upper stator cover, instantly transforming the rotor into a stable double-end support state. This generator assembly device of the present invention... The assembly device enables high-precision, non-destructive concentric fitting of the stator and rotor, thereby improving the assembly qualification rate. It provides adjustable damping descent capability throughout the fitting stroke to flexibly suppress sudden changes in magnetic attraction. During the relative movement of the stator and rotor, it maintains high-precision concentric guiding constraint throughout the process, eliminating sway at the cantilever end. At the same time, the generator assembly device of this invention is easy to disassemble and assemble, convenient to operate, and has a certain degree of compatibility with different frame models. This solves the problems of skewing and scraping caused by strong magnetic attraction and single-end cantilever state of the rotor in the assembly of permanent magnet generators (especially shaftless generators), as well as the problems of unstable generator assembly quality and high assembly cost.

[0038] The generator assembly device of the present invention utilizes the hollow characteristics of the shaftless generator rotor, and introduces a slow-descent component and a slow-descent control component that cooperates with the slow-descent component, thereby converting the uncontrollable strong magnetic attraction force into a smooth and stable mechanical descent thrust, eliminating the risk of scratching of the isolation cover and damage to components caused by instantaneous attraction between the stator and the rotor. Furthermore, by employing a dual-limiting design combining a central concentric guide component and peripheral circumferential auxiliary guide rods, the rotor is instantly transformed from a cantilever beam state to a double-end supported state during stator descent, ensuring absolute concentricity throughout the entire stroke. In addition, during the disassembly and fixing stages, a one-for-one guide rod replacement strategy effectively avoids relative displacement during assembly handover, ensuring assembly stability and consistency. The generator assembly device of this invention features a simplified structure, rigorous operating logic, and low manufacturing cost, greatly improving the generator assembly success rate.

[0039] Preferably, the push-hover component 20 is configured as a push-hover flange.

[0040] It should be noted that before being assembled with the descent drive unit 1 and the rotor support unit 3, the stator unidirectional unit 2 is pre-assembled first. The stator housing 210 has an upper end cover connection hole, and the upper end cover 211 has a housing connection hole 2111. The upper end cover connection hole is aligned with the housing connection hole 2111, and a fastening connection is achieved by bolts. In addition, the upper end cover 211 also has a top threaded hole 2110, and the push-up suspension member 20 has a fixing hole 202. The top threaded hole 2110 and the fixing hole 202 are aligned to further fasten the push-up suspension member 20 to the top end face of the upper end cover 211 by bolts.

[0041] Preferably, the descent control 13 is configured as a descent control screw; In a preferred embodiment, the descent control assembly 14 includes a hovering support nut 140 and a descent control handwheel 141. The hovering support nut is screwed to the descent member 13, and the hovering support nut 140 is coaxially embedded in the descent control handwheel 141.

[0042] Furthermore, the mounting base plate 11 has an anti-rotation limiting groove in the middle, the anti-rotation component 12 is snapped into the anti-rotation limiting groove, and the end of the deceleration member 13 is screwed into the anti-rotation component 12 for fixation, forming a rigid guide structure in the vertical direction. In a preferred embodiment, the anti-rotation component 12 specifically includes a positioning boss and an anti-rotation nut. The positioning boss is fitted to the center of the mounting base plate 11, and the positioning boss has a receiving groove. The anti-rotation nut is pre-set in the receiving groove, and the end of the deceleration member 13 is adapted to the anti-rotation nut, thereby allowing the deceleration member 13 to be limited within the anti-rotation component 12.

[0043] Furthermore, the inner rotor assembly 30 includes an isolation cover 300, an upper bearing 301, and a lower bearing 302. The rotor 101 is housed in the isolation cover 300. The upper bearing 301 and the lower bearing 302 are respectively disposed at the ends of the isolation cover 300 and connected to the rotor 101. The lower end cover 212 is provided with a sleeve part 2120 and a bearing boss 2121. The isolation cover 300 is fixed to the sleeve part 2120. The bearing boss 2121 is connected to the lower bearing 302 to position the lower bearing 301. The material of the isolation cover 300 includes, but is not limited to, PC.

[0044] In detail, the rotor 101 includes a blade assembly and a rotor base, and the blade assembly is mounted inside the isolation cover 300 through the rotor base.

[0045] In a preferred embodiment, the lower end cover 212 is provided with a base mounting hole, and the lower end cover is connected to the corresponding positioning hole on the mounting base plate 11 through the base mounting hole to vertically support the inner rotor assembly 30.

[0046] In detail, the bearing boss 2121 on the lower end cover 212 has a pre-drilled base mounting hole, which is aligned with the corresponding positioning hole on the mounting base plate 11 and fastened with bolts, thereby vertically supporting the inner rotor assembly 30. Furthermore, due to the through-hole structure of the shaftless turbine generator rotor, the centrally located descent member 13 can pass through the center of the inner rotor assembly 30 from bottom to top without interference. At this time, the inner rotor assembly 30 is in a cantilever beam state with its lower end fixed during the initial assembly stage. In a preferred embodiment, the concentric guide assembly 31 includes an upper body 310, a lower body 311, and a central hole 312. The upper body 310 and the lower body 311 are coaxially arranged, and the central hole 312 is provided through the geometric center of the upper body 310 and the lower body 311. The descent member 13 passes through the central hole 312. The diameter of the upper body 310 is larger than that of the lower body 311, thereby forming a stepped structure between the upper body 310 and the lower body 311. The lower body 311 cooperates with the interior of the inner rotor assembly 30 to achieve concentric positioning. The upper body 310 is used to concentrically guide the stator housing assembly 21 when it descends, thereby solving the concentric positioning problem of the cantilever end and the positioning problem of the upper bearing 301.

[0047] In detail, the flange fixing hole of the push-hover component 20 is opposite to the top threaded hole of the upper end cover 211, and the push-hover component 20 is assembled to the top end face of the upper end cover 211 by fasteners. In addition, the end face of the push-hover component 20 is provided with a mounting hole, and the deceleration component passes through the mounting hole.

[0048] In a preferred embodiment, the overhead support assembly 10 includes four supports, the mounting base 11 has base connection holes at the four bottom corners, and the supports have base connection holes at the top. The base connection holes and the base connection holes are aligned with each other and are fastened together by bolts.

[0049] In a preferred embodiment, the guide assembly 22 includes a plurality of guide rods spaced circumferentially along the inner rotor assembly 30, and a plurality of housing connection holes 2111 are provided, each guide rod being disposed in one of the housing connection holes 2111, and the plurality of guide rods being arranged in a vertical direction; Specifically, the lower end cover 212 is provided with a plurality of lower end cover guide holes 2122, and each of the supports is provided with a support limiting hole 102 at its top; The multiple guide rods correspond one-to-one with the guide holes of the lower end cover and the support limiting holes 102 along the height direction.

[0050] Preferably, the stator guide unit 2 further includes a stator spacer 23, which is coaxially arranged with the stator 100. One end of the stator spacer 23 is connected to the stator 100, and the other end of the stator spacer 23 is connected to the upper end cover 211 to position the stator 100 in the axial direction.

[0051] The process of concentrically assembling the generator stator and rotor using the assembly device of the present invention is as follows: First, the rotor support unit 3 and the descent drive unit 1 are fixed to their bases. Then, the concentric guide assembly 31 is fitted down along the descent member 13 to complete the double-end positioning of the top and bottom of the inner rotor assembly 30.

[0052] Subsequently, the hovering support nut 140 and the descent control handwheel 141 are screwed together into the upper middle part of the descent component 13.

[0053] At this time, the operator lifts up the pre-assembled stator guide unit 2 as a whole, so that the slow-descent component 13 passes through the central mounting hole 201, so that the bottom of the stator guide unit 2 is stably supported by the slow-descent control component 14 below and hovers on the hovering support nut 140, so that the stator 100 is suspended and stays directly above the rotor 101. Next, rotate the suspended stator guide unit 2 so that the four circumferential auxiliary guide rods at the bottom of the guide assembly 22 pass through the lower end cover guide hole 2122 of the lower end cover 212 in sequence and are initially aligned with the support limiting hole 102 at the top of the insertion support. Manually and slowly rotate the slow-descent control handwheel 141, and the suspension support nut 140 supporting the stator assembly will slowly descend on the slow-descent component 13. During this descent, the mechanical support force generated by the screw and nut will smoothly counteract the downward strong magnetic attraction force generated by the permanent magnet during the assembly process. At the same time, the upper body 310 of the concentric guide assembly 31 will precisely slide into the inner diameter of the bearing boss of the upper end cover 211 for inner guidance. At this time, the force model of the inner rotor assembly 30 will change from a cantilever beam state with one end fixed to a double-end support state with both ends reliably positioned. The structural rigidity will be greatly improved, and the rotor deflection and scraping caused by strong magnetic attraction force will be effectively prevented. Under the dual limiting action of the central concentric guide assembly 31 and the peripheral guide assembly 22 (multiple guide rods), the stator housing assembly 21 completely and smoothly covers the inner rotor assembly 30 until the end faces are fully fitted, ultimately achieving non-destructive, high-precision concentric assembly of the generator stator and rotor. Once the end faces of the motor stator and rotor are fully engaged, the assembly process is complete, and the process then proceeds to the tooling disassembly and final motor connection stage. First, remove the positioning component located at the top, unscrew the fastening bolts connecting the push-up suspension component 20 and the upper end cover 211, and remove the push-up suspension component 20 from the top of the motor; then, rotate upward along the descent component 13 and remove the descent control handwheel 141 and the suspension support nut 140. Next, slide the descent member 13 upwards and remove the concentric guide assembly 31 to release its positioning limit on the upper bearing 301. Subsequently, in order to make room for the subsequent motor fastening bolts, the bottom descent drive unit 1 is separated. The fixing bolts connecting the lower end cover 212 and the mounting base plate 11 are unscrewed, the connection between the motor body and the overhead support assembly 10 is released, and the generator body is lifted off the descent drive unit 1 below.

[0054] At this time, thanks to the bearing boss 2121 provided on the lower end cover 212 being fully fitted with the lower end inner diameter of the stator housing assembly 21, reliable concentric positioning and locking have been achieved between the motor stator and rotor, and eccentric lateral displacement will not occur due to magnetic attraction. Finally, replace the four guide rods with the actual motor fastening bolts in turn; To prevent slight axial movement during assembly, the guide rods are removed one by one. After each guide rod is pulled out, the actual motor fastening bolts are immediately inserted into the bolt holes of the stator housing and the guide holes 2122 of the lower end cover and tightened. After all the guide rods have been replaced and tightened, the motor stator housing assembly 21 and the lower end cover 212 are fully rigidly connected.

[0055] At this point, the high-precision assembly of the generator is complete. Example 2

[0056] The present invention also discloses a generator assembly method, which uses a generator assembly device as described in Embodiment 1 to assemble the stator 100 and rotor 101 of a generator. The generator assembly method includes, Step S1: Rotate the slow descent control component 14 to make the stator 100 descend smoothly along the slow descent component 13. As the concentric guide component 31 slides into the upper end cover 211, the force on the inner rotor assembly 30 changes from a single-end vertical cantilever state to a double-end support state. Step S2: When the stator housing assembly 21 is fully fitted with the end face of the lower end cover 212, so that the stator 100 and the rotor 101 are concentrically covered, the guide assembly 22 is replaced with generator fasteners in sequence to complete the overall assembly.

[0057] The generator assembly device mainly consists of three parts: stator guide unit 2, rotor support unit 3 and descent drive unit 1. The descent drive unit 1 includes a mounting base plate 11, anti-rotation component 12, descent component 13 and descent control component 14. The bottom end of the descent component 13 is fixed to the middle of the mounting base plate 11 to form a vertically upward rigid center guide rail.

[0058] The stator guide unit 2 includes a pre-assembled stator housing assembly 21, an upper end cover 211, a lower end cover 212, and a push-and-hover component. Four guide rods are vertically inserted at the bottom of the stator housing assembly 21. The central opening sleeve of the push-and-hover component 20 passes through the descent component 13 and is stably supported on the lower suspension support nut 140.

[0059] The rotor support unit 3 includes an inner rotor assembly 30 fixed on the mounting base plate 11 and nested in the lower end cover 212, and a concentric guide assembly 31 sleeved on the descent member 13 and inserted into the top of the inner rotor assembly 30. The concentric guide assembly 31 realizes the pressing and positioning limit of the upper bearing 301 of the rotor.

[0060] During actual assembly, the entire stator guide unit 2 is smoothly lowered along the descent member 13 and the peripheral circumferential auxiliary guide rods by slowly rotating the slow-descent control handwheel 141 manually. The strong magnetic attraction between the stator and rotor is overcome by pure mechanical support. As the concentric guide assembly 31 slides into the inner diameter of the upper end cover 211, the force model of the inner rotor assembly 30 is reliably transformed from a single-end vertical cantilever state to a stable double-end support state. This continues until the stator housing assembly 21 and the end face of the lower end cover 212 are completely fitted together, thereby achieving precise concentric fitting of the stator and rotor 101. Finally, the circumferential auxiliary guide rods are replaced one by one with the formal motor fastening bolts, thus completing the overall assembly.

[0061] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A generator assembly device, characterized in that: For assembling a generator, the generator including a stator and a rotor, the generator assembly device includes, A slow-descent drive unit includes a mounting base, an anti-rotation component, a slow-descent member, and a slow-descent control component; the anti-rotation component is disposed on the mounting base, one end of the slow-descent member is connected to the anti-rotation component, and the slow-descent member extends along the height direction; the slow-descent control component is rotatably connected to the slow-descent member. A stator guide unit includes a push-and-hover component, a stator housing assembly, and a guide assembly. The stator housing assembly includes a stator housing, an upper end cover, and a lower end cover. The upper and lower end covers are respectively disposed at both ends of the stator housing, and the lower end cover is detachably connected to the stator housing. The stator is pre-installed inside the stator housing. The guide assembly is disposed along the height direction of the stator housing to guide and limit the movement of the stator housing assembly. The push-and-hover component is connected to the upper end cover and cooperates with the descent component. The rotor support unit includes an inner rotor assembly and a concentric guide assembly, wherein the concentric guide assembly presses and positions the inner rotor assembly; the lower end cover is fixedly assembled to the mounting base plate, the inner rotor assembly is nested in the lower end cover, and the concentric guide assembly is sleeved on the deceleration member and inserted into one end of the inner rotor assembly; During assembly, the slow-descent control assembly is rotated to lower the stator housing assembly, while the concentric guide assembly slides to the upper cover to provide double-end support for the inner rotor assembly along the height direction.

2. The generator assembly device according to claim 1, characterized in that: The descent control component is configured as a descent screw; the descent control assembly includes a hovering support nut and a descent control handwheel, the hovering support nut is coaxially embedded in the descent control handwheel, and the hovering support nut is screwed to the descent screw.

3. The generator assembly device according to claim 1, characterized in that: The mounting base plate has an anti-rotation limiting groove in the middle, which matches the anti-rotation component. The anti-rotation component is snapped into the anti-rotation limiting groove. The end of the descent member is screwed into the anti-rotation component for fixation, forming a rigid guide along the height direction.

4. The generator assembly device according to claim 1, characterized in that: The inner rotor assembly includes an isolation cover, an upper bearing, and a lower bearing. The rotor is housed within the isolation cover. The upper bearing and the lower bearing are respectively disposed at the ends of the isolation cover and connected to the rotor. The isolation cover is connected to the sleeve portion of the lower end cover. The lower end cover has a bearing boss to position the lower bearing.

5. A generator assembly device according to claim 4, characterized in that: The lower end cover is provided with a sleeve and a bearing boss, and the isolation cover is fixed to the sleeve; the bearing boss is connected to the lower bearing to position the lower bearing.

6. A generator assembly device according to claim 4, characterized in that: The concentric guide assembly includes an upper body, a lower body, and a central hole. The upper body and the lower body are coaxially arranged, and the central hole is disposed through the upper body and the lower body. The descent member passes through the central hole. The diameter of the upper body is larger than that of the lower body. The lower body cooperates with the inner rotor assembly for concentric positioning.

7. A generator assembly device according to claim 1, characterized in that: The flange fixing hole of the push-up suspension component is opposite to the top threaded hole of the upper end cover, and the push-up suspension component is assembled to the top end face of the upper end cover by fasteners.

8. A generator assembly device according to claim 1, characterized in that: The end face of the push-and-hover component is provided with a mounting hole, and the descent component passes through the mounting hole.

9. A generator assembly device according to claim 8, characterized in that: The guiding assembly includes a plurality of guide rods spaced circumferentially along the inner rotor assembly, and the plurality of guide rods are arranged vertically inside the stator housing; the plurality of guide rods correspond one-to-one with the lower end cover guide hole located on the lower end cover and the support limiting hole located on the overhead support assembly along the height direction.

10. A generator assembly method, characterized in that: Using a generator assembly apparatus as described in any one of claims 1-9, the stator and rotor of a generator are assembled, the generator assembly method comprising, Step S1: Rotate the slow descent control component to make the stator descend smoothly along the slow descent component. As the concentric guide component slides into the upper cover, the force on the inner rotor assembly changes from a single-end vertical cantilever state to a double-end support state. Step S2: When the stator housing assembly is fully fitted with the end face of the lower end cover, making the stator and rotor concentrically fitted, remove the push-mounted suspension component, remove the concentric guide assembly, and replace the guide assembly with generator fasteners in sequence to complete the overall assembly.

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