Anti-deformation tool for stator core of semi-direct-driven wind driven generator

Abstract

The utility model relates to the technical field of hoisting devices in motor assembly, and discloses an anti-deformation tool for a stator core of a semi-direct-driven wind driven generator, which comprises an upper annular plate and a lower annular plate, the upper annular plate and the lower annular plate are connected through a rib plate, and two ends of the rib plate are connected with the upper annular plate and the lower annular plate in a welding manner; the lower annular plate is provided with a positioning spigot used for supporting a stator core. And the radial fixation of the stator iron core is realized through clearance fit or a radial jacking mechanism between the stator iron core and the upper ring plate and between the stator iron core and the lower ring plate. The tool is a whole, rigidity is better, fastening pieces do not need to be disassembled and assembled in batch production, the problem that the fastening pieces are damaged does not exist, efficiency is higher, radial fixation of the iron core is achieved by selecting proper machining fit tolerance or arranging a radial jacking mechanism, therefore, cylindricity of the iron core is limited, and the anti-deformation effect of the iron core is better.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting devices in motor assembly, and more specifically to a stator core deformation prevention tooling for a semi-direct-drive wind turbine generator. Background Art

[0002] The stator core of a semi-direct-drive wind turbine has a weak rigidity and is easily deformed when hoisted and turned over after assembly. If anti-deformation measures are not taken during stator assembly and VPI, it is easy to cause the stator inner diameter size to be unqualified and the air gap to be uneven after the motor is assembled, which may cause large vibration during the operation of the unit, which is not conducive to the safe and stable operation of the unit in batches.

[0003] The utility model patent with publication number CN201922367U discloses a universal tooling for the stator of a semi-direct-drive wind turbine, including an upper roller and a lower roller with rigging holes on the outer circle, the lower roller being fixed directly below the upper roller, and the upper roller and the lower roller being fixedly connected to the workpiece by fasteners. The stator can be turned over multiple times, and only some auxiliary parts on the tooling need to be disassembled, while the rolling operation of the workpiece can be realized, and the strength of the workpiece can be improved after the tooling is assembled, and it is convenient to lift; and a set of tooling of the utility model can be used for multiple processes, the lifting point is easy to disassemble, and the work efficiency is improved, and the strength of the workpiece is improved, the deformation of the workpiece during each process is reduced, and the difficulty caused by the deformation of the core when the core is heat-fitted is reduced.

[0004] In batch operation, the screws of the above structure are frequently disassembled and assembled, which is labor-intensive. At the same time, due to the bolt assembly method, the overall rigidity is weaker, which will affect the anti-deformation effect. In addition, after the stator VPI (vacuum pressure impregnation of insulating resin), insulating glue penetrates into the threads, causing thread rot, making disassembly difficult and inefficient. Summary of the invention

[0005] In order to solve the problems and shortcomings existing in the above-mentioned prior art, the utility model proposes a semi-direct-drive wind turbine stator core anti-deformation tooling. The entire tooling is designed as a whole. By selecting a suitable fitting tolerance, the core is fixed as a whole in the tooling, thereby achieving the effect of enhancing the rigidity of the core.

[0006] In order to achieve the above-mentioned invention object, the technical solution of the utility model is as follows:

[0007] The utility model discloses a semi-direct-drive wind turbine stator core deformation prevention tooling, comprising an upper ring plate and a lower ring plate, wherein the upper ring plate and the lower ring plate are connected via rib plates, and the rib plates are welded to the upper ring plate and the lower ring plate; a positioning stop for supporting the stator core is arranged on the lower ring plate; the stator core and the upper ring plate and the lower ring plate are radially fixed at the upper and lower ends of the stator core via clearance fit or a radial supporting mechanism.

[0008] Furthermore, as a preferred solution of the utility model, when the radial fixation of the stator core is achieved by gap fitting between the stator core and the upper ring plate and the lower ring plate, the diameter fitting clearance between the inner circle of the upper ring plate and the positioning stop of the lower ring plate and the stator core is between 0.04 and 0.5 mm.

[0009] Further, as a preferred solution of the utility model, the radial fixing method of the stator core can also be that the stator core and the lower ring plate are matched with each other in clearance, and the upper ring plate and the upper ring plate are fixed radially at both ends of the stator core through a radial supporting mechanism. The specific solution is: the diameter matching clearance between the positioning stop of the lower ring plate and the stator core is 0.04~0.5mm, the inner circle size of the upper ring plate is larger than the outer diameter of the stator core by more than 0.5mm, and the upper ring plate is provided with a radial supporting mechanism, which includes a top screw, one end of which is fixed to the upper ring plate through a support seat, and the other end is radially abutted against the outer wall of the stator core. The radial supporting mechanism is evenly arranged on the upper ring plate along the circumferential direction.

[0010] Furthermore, as a preferred solution of the utility model, the radial fixing method of the stator core can also be that the stator core and the upper ring plate and the lower ring plate are radially fixed by radial supporting mechanisms at the upper and lower ends of the stator core. The specific solution is: the upper ring plate and the lower ring plate are respectively provided with radial supporting mechanisms, and the radial supporting mechanisms include a top screw, one end of the top screw is fixed to the ring plate through a support seat, and the other end is radially abutted against the outer wall of the stator core. The radial supporting mechanisms are evenly arranged on the upper ring plate and the lower ring plate along the circumferential direction.

[0011] Further, as a preferred solution of the utility model, compared with the above solution, the structure of the radial support mechanism is different. Specifically, the radial support mechanism includes a wedge plate, and the upper ring plate and the lower ring plate are respectively provided with key slots matching the wedge plate in the axial direction, and the wedge plate is clamped in the key slot, and the plane of the wedge plate abuts against the outer wall of the stator core. In the utility model, the wedge plate clamped in the key slots of the upper and lower ring plates can be one, that is, the wedge plates on the upper and lower ring plates are integrated, and their two ends are respectively clamped in the key slots of the upper and lower ring plates, and the upper and lower key slots must be concentric at this time; or the wedge plates can be respectively provided in the key slots of the upper and lower ring plates, and the wedge plates on the upper and lower ring plates are independent.

[0012] Furthermore, as a preferred solution of the utility model, the upper ring plate is also provided with a movable pressure plate, one end of which is fixedly connected to the upper ring plate by a bolt, and the other end of which extends radially to press the stator core. The movable pressure plates are evenly arranged on the upper ring plate along the circumferential direction.

[0013] Furthermore, as a preferred solution of the utility model, the upper ring plate and the lower ring plate are provided with paint leakage holes and hanger handle holes.

[0014] Furthermore, as a preferred solution of the utility model, the ribs are evenly distributed between the upper ring plate and the lower ring plate.

[0015] Based on the above anti-deformation tooling, the method of hoisting the stator core using the anti-deformation tooling in the utility model is as follows:

[0016] a. The stator core is inserted into the anti-deformation tooling, and the positioning stop on the lower ring plate holds and fixes the stator core. Through the diameter clearance between the stator core and the upper and lower ring plates, or the radial support mechanism set on the ring plate, the radial limit fixation of the stator core is realized, the cylindricality of the core is limited, and the support stiffness is ensured;

[0017] b. Lifting to the offline workstation and inserting wire (due to the reasonable design of the lifting process hole, the deformation caused by directly lifting the core can be avoided, and the quality loss caused by touching the end of the stator coil can also be avoided);

[0018] c. Lift to the test station and conduct a test;

[0019] d. Lift to the wiring station and weld the joints;

[0020] e. Lift to the test station and conduct secondary test;

[0021] f. Lift to VPI station, turn over, impregnate and bake for the first time (by reasonably setting paint leakage holes on the mating surface, it is effectively avoided that the resin blocks the ventilation groove of the core, etc., causing quality rework; by reasonably designing the turning process holes, the stator can be turned in vain, which can avoid the deformation of the core and the collision of the coil caused by turning over);

[0022] g. Turn over, dip and bake for the second time;

[0023] h. The stator is disengaged from the anti-deformation tooling.

[0024] Beneficial effects of the utility model:

[0025] (1) The core anti-deformation tooling of the utility model is a whole, has better rigidity, does not require disassembly and assembly of fasteners in mass production, and does not cause the problem of fastener damage, which is more efficient.

[0026] (2) The upper and lower ring plates of the utility model are welded into a whole, which can solve the problem of eccentricity of the upper and lower roller plates in the prior art. By selecting appropriate processing tolerances, the cylindricality of the core is limited, and the core deformation prevention effect is better. During the assembly process, the rigidity of the stator core is enhanced until it is hot-fitted into the stator frame.

[0027] (3) The upper and lower ring plates of the utility model limit the cylindricity of the core by evenly tightening the circumferential top screw, thereby achieving a better effect in preventing the core from being deformed.

[0028] (4) The upper and lower ring plates of the utility model limit the cylindricity of the core by evenly tightening the circumferential wedge plates, thereby achieving a better effect in preventing the core from being deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and following detailed description of the present invention will become more clear when read in conjunction with the following drawings, in which:

[0030] Figure 1 It is a three-dimensional schematic diagram of the tooling of the utility model;

[0031] Figure 2 This is a sectional view of the tooling of Embodiment 1 of the utility model;

[0032] Figure 3 This is a sectional view of the tooling of Embodiment 2 of the utility model;

[0033] Figure 4 This is a schematic diagram of the radial supporting mechanism of Example 4 of the utility model.

[0034] In the figure:

[0035] 1. Upper ring plate; 2. Lower ring plate; 3. Rib plate; 4. Movable pressure plate; 5. Stator core; 6. Top screw; 7. Wedge plate; 8. Positioning stop. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions for achieving the invention purpose of the utility model will be further described below through several specific embodiments. It should be noted that the technical solutions claimed for protection by the utility model include but are not limited to the following embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the utility model.

[0037] The embodiment of the utility model provides a semi-direct-drive wind turbine stator core anti-deformation tooling to achieve anti-deformation during hoisting in various processes such as the stator core and the stator offline machine VPI. In the structural design process of the stator core anti-deformation tooling, the utility model designs it as a whole, and fixes the core as a whole in the tooling by selecting a suitable matching tolerance, thereby achieving the effect of enhancing the rigidity of the core. The structure of the tooling of the utility model will be explained and illustrated in combination with a specific implementation method.

[0038] Example 1

[0039] This embodiment discloses a semi-direct drive wind turbine stator core deformation prevention tooling, refer to the attached manual Figure 1-Figure 2 As shown, the anti-deformation tooling includes an upper ring plate 1 and a lower ring plate 2 located below the upper ring plate 1, wherein the thickness of the upper ring plate 1 is not less than 40 mm, and the thickness of the lower ring plate 2 is not less than 60 mm. A certain number of ribs 3 are evenly arranged along the circumference between the upper ring plate 1 and the lower ring plate 2, and the thickness of the ribs 3 is generally 20-30 mm. The position of the ribs 3 cannot be too close to the stator core to prevent resin accumulation. The two ends of the ribs 3 are respectively connected to the bottom surface of the upper ring plate 1 and the surface of the lower ring plate 2 by welding, and finally the upper ring plate 1, the lower ring plate 2 and the ribs 3 are welded into a whole, annealed according to the relevant standard heat treatment process, and then the inner circles of the upper and lower ring plates are finely machined and chamfered, and at the same time, the positioning stop 8 on the lower ring plate 2 is machined. The positioning stop 8 is a step structure, consisting of a circumferential surface and a plane. The circumferential surface is radially positioned with the core to ensure matching, and the plane is used to support the core. After the upper and lower ring plates are machined in place, the matching tolerance between the inner circle size of the upper ring plate and the circumferential size of the positioning stop 8 and the outer diameter of the stator core 5 is between 0.04 and 0.5 mm. Furthermore, according to the structure of the stator core 5, the paint leakage holes and the hanger handle holes are machined at the corresponding positions on the upper ring plate 1 and the lower ring plate 2 at the same time.

[0040] In the embodiment described in the present invention, the paint leakage hole and the hanger handle hole are arranged on the plane of the ring plate; wherein, the paint leakage hole is arranged close to the inner circle; the hanger handle hole needs to avoid the coil end to avoid friction and is arranged relatively close to the outer circle.

[0041] When in use, before the stator core 5 is offline, the stator core 5 is hoisted into the anti-deformation tooling to complete the stator offline, end wiring, VPI and baking, so that the stator core does not deform during the entire assembly process. At the same time, as a preferred implementation of this embodiment, if the stator core needs to be turned over and dipped and baked, a movable pressure plate 4 can be added, and a movable pressure plate 4 is added to the upper ring plate 1 to close the hole and the turning over lifting hole, and then the tooling is used to turn over, complete the VPI with the driving end facing up, and then turn over to complete the VPI with the non-driving end facing up, so that the stator core does not deform during the turning over process. The movable pressure plate 4 is evenly arranged on the upper surface of the upper ring plate 1 in the circumferential direction, and one end of the movable pressure plate 4 is fixedly connected to the upper ring plate 1 by a closing bolt, and the other end extends radially to the top of the stator core 5, thereby pressing the stator core 5 to prevent it from falling out during turning over.

[0042] Example 2

[0043] This embodiment discloses a semi-direct drive wind turbine stator core deformation prevention tooling, refer to the attached manual Figure 3As shown, the anti-deformation fixture includes an upper ring plate 1 and a lower ring plate 2 located below the upper ring plate 1, wherein the thickness of the upper ring plate 1 is not less than 40 mm, and the thickness of the lower ring plate 2 is not less than 60 mm. A certain number of ribs 3 are evenly arranged along the circumference between the upper ring plate 1 and the lower ring plate 2. The thickness of the ribs 3 is generally 20-30 mm. The ribs 3 cannot be too close to the stator core to prevent resin accumulation. The two ends of the ribs 3 are respectively connected to the bottom surface of the upper ring plate 1 and the surface of the lower ring plate 2 by welding, and finally the upper ring plate 1 and the lower ring plate 2 are connected. 2 and rib plate 3 are welded as a whole, annealed according to relevant standard heat treatment process, and then the inner circle of lower ring plate 2 is finely processed and chamfered, and positioning stop 8 is processed on lower ring plate 2, and the clearance between the circumference of positioning stop 8 and stator core 5 is set to 0.04~0.5mm, the inner circle size of upper ring plate 1 is larger than the outer diameter of stator core 5 by more than 0.5mm, and the end face of upper ring plate 1 is evenly provided with a number of top screws 6 along the circumferential direction, and top screws 6 are fixed on upper ring plate 1 through a support seat, and threaded holes matching with top screws are provided on the support seat. At the same time, paint leakage holes and turning sling holes are processed in corresponding positions on upper ring plate 1 and lower ring plate 2 according to the structure of stator core 5.

[0044] When in use, before the stator core 5 is taken off the assembly line, the stator core 5 is hoisted into the fixture, and the end surface of the upper ring plate 1 tightens the top screw 6 evenly along the circumference, and the end of the top screw 6 is radially pressed against the outer wall of the stator core 5, thereby improving the overall rigidity of the core and effectively preventing the stator core from deforming during the off-assembly and VPI processes.

[0045] Similarly, as a preferred implementation of this embodiment, if the stator core 5 needs to be turned over for dipping and drying, a movable pressure plate 4 can be added, and a movable pressure plate 4 is added to the upper ring plate 1 to engage the hole and the turning lifting hole, and then the tooling is used to turn it over, complete the VPI with the driving end facing up, and then turn it over again to complete the VPI with the non-driving end facing up, so that the stator core does not deform during the turning process. The movable pressure plate 4 is evenly arranged on the upper surface of the upper ring plate 1 in the circumferential direction, one end of the movable pressure plate 4 is fixedly connected to the upper ring plate 1 by engaging the bolts, and the other end extends radially to the top of the stator core 5, thereby pressing the stator core 5 to prevent it from falling out during turning over.

[0046] Example 3

[0047] The present embodiment discloses a semi-direct-drive wind turbine stator core anti-deformation tooling. The difference between the present embodiment and the second embodiment is that the circumferential size of the positioning stop 8 of the lower ring plate 2 and the inner circle size of the upper ring plate 1 are both larger than the outer diameter of the stator core 5 by more than 0.5 mm. The upper ring plate 1 and the lower ring plate 2 are respectively provided with a top screw 6. The top screws on the upper ring plate 1 and the lower ring plate 2 respectively tighten the upper and lower ends of the stator core 5, thereby improving the overall rigidity of the core.

[0048] Example 4

[0049] This embodiment discloses a semi-direct drive wind turbine stator core deformation prevention tooling, refer to the attached manual Figure 4 As shown, the anti-deformation tooling includes an upper ring plate 1 and a lower ring plate 2 located below the upper ring plate 1, wherein the thickness of the upper ring plate 1 is not less than 40 mm, and the thickness of the lower ring plate 2 is not less than 60 mm. A certain number of ribs 3 are evenly arranged along the circumference between the upper ring plate 1 and the lower ring plate 2. The thickness of the ribs 3 is generally 20-30 mm. The position of the ribs 3 cannot be too close to the stator core to prevent the accumulation of resin. The two ends of the ribs 3 are respectively connected to the bottom surface of the upper ring plate 1 and the lower ring plate 2 by welding. The surface of the plate 2 is connected, and finally the upper ring plate 1, the lower ring plate 2 and the rib plate 3 are welded into a whole, annealed according to the relevant standard heat treatment process, and then the inner circle of the lower ring plate 2 is finely processed and chamfered, and the positioning stop 8 is processed on the lower ring plate 2. The clearance between the circumference of the positioning stop 8 and the stator core 5 is set to 0.04~0.5mm. The inner circle size of the upper ring plate 1 is larger than the outer diameter of the stator core 5 by more than 0.5mm, and the upper ring plate 1 is provided with a number of axial keyways along the circumferential direction. At the same time, according to the structure of the stator core 5, the paint leakage holes and the turning sling holes are processed in the corresponding positions on the upper ring plate 1 and the lower ring plate 2. When in use, before the stator core 5 is taken off the assembly line, the stator core 5 is hoisted into the tooling, and the wedge plate 7 is evenly tightened in the axial keyway of the upper ring plate 1. The flat surface of the wedge plate 7 is pressed against the outer wall of the core to fix the stator core 5. Under the action of the wedge plate 7, the stator core can be effectively prevented from deformation during the process of taking off the assembly line and VPI.

[0050] Similarly, as a preferred implementation of this embodiment, if the stator core 5 needs to be turned over for dipping and drying, a movable pressure plate 4 can be added, and a movable pressure plate 4 engagement hole and an overturning lifting hole can be added to the upper ring plate 1, and then the tooling is used to turn it over, complete the VPI with the driving end facing up, and then turn it over again to complete the VPI with the non-driving end facing up, so that the stator core 5 does not deform during the overturning process. The movable pressure plate 4 is evenly arranged on the upper surface of the upper ring plate 1 in the circumferential direction, one end of the movable pressure plate 4 is fixedly connected to the upper ring plate 1 by the engagement bolt, and the other end extends radially to the top of the stator core 5, thereby pressing the stator core 5 to prevent it from falling out during the overturning.

[0051] Example 5

[0052] The present embodiment discloses a semi-direct-drive wind turbine stator core deformation prevention tooling. The difference between the present embodiment and embodiment 4 is that the positioning stop 8 of the lower ring plate 2 and the inner circle size of the upper ring plate 1 are both larger than the outer diameter of the stator core 5 by more than 0.5 mm, and the two ring plates are provided with a plurality of axial key grooves along the circumferential direction, and wedge plates 7 are provided in the axial key grooves of the upper and lower ring plates.

[0053] In this embodiment, when the keyways provided on the upper and lower ring plates are concentric, the wedge plate 7 provided in the pair of concentric keyways is one, which is inserted into the upper ring plate 1 and extends axially downward to the keyway of the lower ring plate 1. If the keyways are not concentric, the wedge plates 7 are provided in the keyways of the upper and lower ring plates respectively, and the upper and lower wedge plates are independent.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A semi-direct drive wind turbine stator core anti-deformation tooling, characterized in that: The invention comprises an upper ring plate (1) and a lower ring plate (2), wherein the upper ring plate (1) and the lower ring plate (2) are connected via a rib plate (3), and the rib plate (3) is welded to the upper ring plate (1) and the lower ring plate (2); a positioning stop (8) for supporting a stator core (5) is provided on the lower ring plate (2); and the stator core (5) is radially fixed to the upper ring plate (1) and the lower ring plate (2) via a clearance fit or a radial support mechanism.

2. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1 is characterized in that: The diameter matching clearance between the inner circle of the upper ring plate (1), the positioning stop (8) of the lower ring plate (2) and the stator core (5) is between 0.04 and 0.5 mm.

3. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1 is characterized in that: The diameter matching clearance between the positioning stop (8) of the lower ring plate (2) and the stator core (5) is 0.04-0.5 mm. The upper ring plate (1) is provided with a radial supporting mechanism, which comprises a top screw (6). One end of the top screw (6) is fixed to the upper ring plate (1) through a support seat, and the other end is radially abutted against the outer wall of the stator core (5).

4. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1 is characterized in that: The upper ring plate (1) and the lower ring plate (2) are respectively provided with radial supporting mechanisms, the radial supporting mechanisms comprising a supporting screw (6), one end of the supporting screw (6) being fixed to the ring plate via a supporting seat, and the other end being radially abutted against the outer wall of the stator core (5).

5. The stator core anti-deformation tooling for a semi-direct-drive wind turbine generator according to claim 1, characterized in that: The diameter matching clearance between the positioning stop (8) of the lower ring plate (2) and the stator core (5) is 0.04-0.5 mm. The upper ring plate (1) is provided with a radial supporting mechanism, which comprises a wedge plate (7). The upper ring plate (1) is provided with a keyway matching the wedge plate (7) in the axial direction. The wedge plate (7) is clamped in the keyway, and the plane of the wedge plate (7) abuts against the outer wall of the stator core (5).

6. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1, characterized in that: The upper ring plate (1) and the lower ring plate (2) are respectively provided with radial supporting mechanisms, the radial supporting mechanisms comprising a wedge plate (7), key slots matching the wedge plate (7) are respectively provided on the upper ring plate (1) and the lower ring plate (2) along the axial direction, the wedge plate (7) is clamped in the key slot, and the plane of the wedge plate (7) abuts against the outer wall of the stator core (5).

7. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1, characterized in that: A movable pressure plate (4) is provided on the upper ring plate (1), one end of the movable pressure plate (4) is fixedly connected to the upper ring plate (1) by means of a bolt, and the other end of the movable pressure plate (4) extends radially to press the stator core (5).

8. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1, characterized in that: The upper ring plate (1) and the lower ring plate (2) are provided with paint leakage holes and hanger handle engagement holes.

9. The stator core anti-deformation tooling for a semi-direct drive wind turbine according to claim 1, characterized in that: The ribs (3) are evenly distributed between the upper ring plate (1) and the lower ring plate (2).

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