Integrated processing device for forming skewed slot stator core by using fanning strips

Abstract

The utility model belongs to the field of processing and manufacturing of wind driven generator components, and particularly discloses an integrated processing device for forming a skewed slot stator core by using fanning strips, which is characterized in that the fanning strips are spliced and laminated on a lower pressing plate, a guide key is adjusted to control the skewed slot angle of the iron core, then a main tire body is connected with the lower pressing plate through a double-thread screw, and the skewed slot stator core is formed by using the fanning strips. After the fanning strip is fixed, the fanning strip is pressurized through a nut until the design requirement is met, and then the fanning strip and the whole device are transferred to a lathe through a hoisting rib for alignment machining; the technical problems that the inner hole size of the fanning strip structure is difficult to guarantee, the iron core chute angle is difficult to control, the structural rigidity is poor, the follow-up machining difficulty is large and the like are solved, operation is convenient, machining efficiency is high, and the production period is shortened.

Description

Technical Field

[0001] The utility model belongs to the field of processing and manufacturing wind turbine components, and in particular relates to an integrated processing device for forming a skew slot stator core by utilizing fan-shaped sheets. Background Art

[0002] The motor of a wind turbine generator consists of two parts, a stator and a rotor. The stator core is an important component of the stator, which is formed by stacking silicon steel sheets of magnetic conductive material. In the field of wind turbine manufacturing, in order to reduce the production cost of the whole machine, reduce the failure rate, increase the capacity of a single machine, and eliminate harmful harmonics, a large outer circular fan-shaped sheet bevel slot structure core structure is adopted. The stator core is generally spliced ​​with 0.5mm fan-shaped silicon steel sheets. This structure makes it difficult to ensure the inner hole size of the core, the angle of the core bevel slot is difficult to control, the structural rigidity is poor, and the subsequent mechanical processing is difficult.

[0003] In view of this, this utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide an integrated processing device for forming a stator core with inclined slots using sector-shaped sheets. The utility model first splices and stacks the sector-shaped sheets on the main carcass, uses guide keys to control the angle of the inclined slot, and then connects the main carcass to the lower pressure plate through a double-headed screw. After the sector-shaped sheets are fixed, they are pressurized to meet the design requirements and then stacked. Then, the whole device is transferred to a lathe through lifting ribs for alignment processing. The technical problems such as the difficulty in ensuring the inner hole size of the sector-shaped sheet structure, the difficulty in controlling the angle of the core inclined slot, the poor structural rigidity and the difficulty of subsequent mechanical processing are solved. The utility model is easy to operate, has high processing efficiency, and shortens the production cycle.

[0005] The purpose of the utility model is to solve the problem through the following technical solutions:

[0006] The utility model provides an integrated processing device for forming a skewed slot stator core by using a sector sheet, comprising a main carcass in a hollow cylindrical shape, a top plate is arranged above the main carcass, an upper pressing plate is arranged on the circumference of the main carcass, a lower pressing plate is connected to the bottom of the main carcass, the top plate and the lower pressing plate are both annular structures, and the outer diameters of the top plate and the lower pressing plate are both larger than the outer diameter of the main carcass, a skewed slot stator core assembly consisting of multiple layers of sector sheets and a stator pressing ring is arranged on the circumference of the main carcass and between the upper pressing plate and the lower pressing plate, and a plurality of equal-height blocks are evenly arranged between the top plate and the upper pressing plate, the top plate and the lower pressing plate are detachably connected by a plurality of annularly distributed fasteners, and are used to apply pressure to the skewed slot stator core assembly to make it overlap;

[0007] It also includes a plurality of ribs arranged on the circumferential surface of the main carcass, a keyway is arranged on any one of the ribs, a guide key is placed in the keyway, and the guide key is used to control the skew angle of the sector piece in the skew stator core assembly.

[0008] Furthermore, an annular convex stop is provided at the outer diameter of the bottom of the main carcass, and an annular groove matching the convex stop is provided on the lower pressure plate just below the convex stop. The lower pressure plate and the main carcass are connected through the convex stop and the annular groove stop, and the stop is fastened by annularly arranged fastening screws.

[0009] Furthermore, the fastener includes a double-headed screw and a nut matched with the double-headed screw, and a plurality of threaded holes matching with the double-headed screw are evenly distributed in an annular manner on the lower pressure plate, and through holes for the double-headed screw to pass through are provided on the main carcass and the upper pressure plate, one end of the double-headed screw is connected to the threaded hole on the lower pressure plate, and the other end passes through the top plate and is fixed by the nut.

[0010] Furthermore, a plurality of lifting ribs are welded on the inner wall of the main carcass, and the plurality of lifting ribs are arranged in a criss-cross pattern, so as to cooperate with the lifting equipment to transfer the device together with the skew slot stator core assembly as a whole to the machining equipment to perform mechanical processing on the outer circle of the skew slot stator core assembly.

[0011] Furthermore, there are two stator pressing rings, which are respectively arranged at the upper and lower ends of the multi-layer sector sheet, and the two stator pressing rings are respectively embedded in the lower surface of the upper pressing plate and the upper surface of the lower pressing plate.

[0012] Furthermore, the upper pressing plate and the lower pressing plate are both stepped circular rings, and the stator pressing ring is embedded on the step surface of the stepped circular ring.

[0013] Furthermore, the guide key is tiltedly arranged in the key slot according to the slot angle required by the skew slot stator core assembly.

[0014] Furthermore, a leveling reference surface and a rounding reference surface both in semicircular ring structures are also provided on the top of the main carcass, and both ends of the leveling reference surface and the rounding reference surface are connected to each other.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model is an integrated processing device for forming a stator core with skewed slots using sector-shaped sheets. The outer diameter size of the main carcass and the rib plate are reasonably set to control the inner hole size of the sector-shaped sheet, and then a guide key is set in the keyway of the main carcass to fix the skewed slot angle of the core, thereby avoiding the difficulty in controlling the skewed slot angle of the core and increasing the difficulty of processing.

[0017] 2. The utility model is an integrated processing device for forming a skewed slot stator core using a sector-shaped sheet. By installing lifting ribs at the inner hole of the main carcass, the entire device is conveniently transported to the vertical lathe position, and is aligned according to the leveling reference surface and the rounding reference surface set in the inner hole of the main carcass. After the mechanical processing is completed, the lifting ribs are used to transport the device to the tire withdrawal area to lift the processed core out of the main carcass. The structure is reasonable and the operation is simple. The integrated design of stacking and processing makes the device easy to use, and can meet the mechanical processing technical difficulties brought about by the large outer diameter circular sector-shaped sheet skewed slot stator core structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic structural cross-sectional view of an integrated processing device for forming a skewed slot stator core using a sector-shaped sheet according to the utility model;

[0021] Figure 2 It is a top view of the main body of the integrated processing device for forming the skew slot stator core by using the sector-shaped pieces of the utility model;

[0022] Figure 3 It is a schematic diagram of the guide key structure of the integrated processing device for forming the skew slot stator core by using the sector-shaped pieces of the utility model;

[0023] in:

[0024] 1 is the main carcass; 11 is the rib plate; 12 is the lifting rib; 13 is the upper fixing plate; 14 is the lower fixing plate;

[0025] 2 is the top plate;

[0026] 3 is an upper pressing plate;

[0027] 4 is a lower pressure plate; 41 is an annular groove; 42 is a fastening screw;

[0028] 5 is equal height block;

[0029] 6 is a fastener; 61 is a double-headed screw; 62 is a nut;

[0030] 7 is a guide key;

[0031] 8-1 is the leveling reference surface; 8-2 is the circular reference surface;

[0032] A is the skew slot stator core assembly; A1 is the sector piece; A2 is the stator pressure ring. DETAILED DESCRIPTION

[0033] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices consistent with some aspects of the utility model as detailed in the attached claims.

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] See also Figures 1 to 3The embodiment of the utility model provides an integrated processing device for forming a skewed slot stator core using a fan-shaped piece, comprising a main carcass 1, a plurality of rib plates 11 are further arranged on the circumferential surface of the main carcass 1, a plurality of lifting ribs 12 are arranged on the inner wall of the main carcass 1, and a leveling reference surface 8-1 and a rounding reference surface 8-2, both of which are semi-circular ring structures, are respectively arranged at the two ends of the top of the main carcass 1. The top of the main carcass 1 is used as an upper fixing plate 13, and the bottom is used as a lower fixing plate 14. A convex stop is also arranged at the bottom outer diameter of the main carcass 1. The top plate 2 is a circular ring structure, and the inner diameter of the top plate 2 is larger than the inner diameter of the main carcass 1, and the outer diameter is larger than the outer diameter of the main carcass 1. The lower pressing plate 4 is also a circular ring structure, and the inner diameter of the lower pressing plate 4 is larger than the inner diameter of the main carcass 1, and the outer diameter is larger than the outer diameter of the main carcass 1. 1, and the lower pressing plate 4 is also provided with an annular groove 41 which cooperates with the convex stopper at the bottom of the main carcass 1, and the main carcass 1 and the lower pressing plate 4 are connected by the cooperation of the convex stopper and the stopper of the annular groove 41, and the skewed slot stator core assembly A of the stator core is made, including a sector piece A1 and a stator pressing ring A2, wherein the stator pressing ring A2 is respectively embedded on the step surface of the upper pressing plate 3 with a step shape at the bottom and the step surface of the lower pressing plate 4 with a step shape at the top, and the bottom of the stator pressing ring A2 embedded on the step surface at the bottom of the upper pressing plate 3 is flush with the bottom of the upper pressing plate 3, and the top of the stator pressing ring A2 embedded on the step surface at the top of the lower pressing plate 4 is flush with the top of the lower pressing plate 4, and the sector piece A1 is placed between the upper pressing plate 3 and the lower pressing plate 4, and the upper pressing plate 3 is placed on the sector piece. Above the sheet A1, the equal-height blocks 5 are arranged between the top plate 2 and the upper pressure plate 3. It should be noted that the top plate 2, the upper pressure plate 3, the lower pressure plate 4, the stator pressure ring A2, and the sector sheet A1 are all circular structures, and the equal-height blocks 5 are rectangular structures and are arranged at equal intervals between the top plate 2 and the upper pressure plate 3. The fastener 6 includes a double-headed screw 61 and a nut 62 matched with the double-headed screw 61. One end of the double-headed screw 61 passes through the main carcass 1 and extends into the threaded hole on the lower pressure plate 4 for fastening, and the other end passes through the top plate 2 and connects the top plate 2, the lower pressure plate 4 and the main carcass 1 into a whole through the nut 9. A plurality of ribs 11 that are close to the main carcass 1 are also arranged on the circumferential surface of the main carcass 1, and a keyway is also arranged on any rib 11. A guide key 7 with an outward convex structure is provided, and the outward convex part of the guide key 7 passes through the sector piece A1, and the inclined groove angle of the sector piece A1 is controlled by the inclination angle of the guide key 7. A lifting rib 12 is also provided at the upper end of the inner wall of the main carcass 1. The lifting rib 12 is a double-layer structure, and a lifting hole is also opened on the upper structure of the lifting rib 12. One end of the upper structure of the lifting rib 12 is welded to the bottom of the upper fixed plate 13, and the other end is welded to one end of another lifting rib 12. One end of the lower structure of the lifting rib 12 is welded to the lower fixed plate 14, and the other end is welded to one end of another lifting rib 12. After the stacking of the sector piece A1 is completed, the entire device and the sector piece A1 are lifted through the lifting hole on the lifting rib 12 and transported to a processing lathe for mechanical processing.

[0036] Specifically, a plurality of fasteners 6 are arranged at equal intervals. Preferably, the present invention arranges 18 fasteners 6 , and the equal-height blocks 5 are staggered with the fasteners 6 , and the number of the equal-height blocks 5 is the same as the number of the fasteners 6 .

[0037] The method of using the integrated processing device for forming the skew slot stator core using the sector piece is as follows:

[0038] During lamination, firstly, the main carcass 1 and the lower pressing plate 4 are connected by cooperating the convex stop at the bottom of the main carcass 1 with the stop of the annular groove 41 on the lower pressing plate, ensuring the coaxiality of the annular groove 41 of the lower pressing plate 4 with the outer diameter of the main carcass 1, and then the stop is tightened by the fastening screw 42 to fix the lower pressing plate 4 on the carcass 1, wherein the fastening screw 42 is arranged in a ring at the stop, and then one end of the double-headed screw 61 in the fastener 6 is passed through the main carcass 1 and extended into the threaded hole of the lower pressing plate 4, so that the lower pressing plate 4 and the main carcass 1 are connected as a whole, and then the stator pressure ring A2 engaged with the lower pressing plate 4 is installed, and then the guide key 7 is placed in the keyway in the main carcass 1, and then the guide key 7 is placed in the keyway in the main carcass 1. Adjust the inclination angle of the guide key 7 according to the position and angle of the inclined slot of the stator core, and then place the fan-shaped piece A1 on the lower pressure plate 4 for stacking. When the stacking work is completed, place the stator pressure ring A2, upper pressure plate 3, equal height block 5 and top plate 2 engaged with the upper pressure plate 3 on the stacking in sequence, and then use the nut 62 to preliminarily tighten the double-headed screw 61, and then use a torque wrench to symmetrically and staggeredly tighten the nut 62 according to the process torque. By tightening the nut 62, a certain pressure is applied to the top plate 2, the equal height block 5 and the upper pressure plate 3, thereby achieving the purpose of applying pressure to the fan-shaped piece A1 for stacking, and then the ribs 11 are symmetrically and staggeredly welded under the pressure maintaining state.

[0039] When machining is performed after lamination, the entire device and the laminated sector A1 are transported to the vertical lathe position by using the lifting device and the lifting bars 13 provided on the main carcass 1, and then the plane of the sector A1 is aligned by the leveling reference surface 8-1 and the rounding reference surface 8-2 provided at both ends of the upper fixed plate 13 on the main carcass 1 to ensure the concentricity and verticality of the outer diameter and the inner diameter of the processed iron core, and then the outer circle of the sector A1 is machined after the vertical lathe chuck is tightened. After the machining is completed, the entire device and the processed stator core are transported to the tire removal area by using the lifting device and the lifting bars 13, and the nut 62, the double-headed screw 61, the top plate 2, the equal height block 5, and the upper pressure plate 3 are removed in turn, and then the processed stator core is lifted out of the main carcass 1 to complete the lamination and machining of the skewed slot stator core.

[0040] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0041] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An integrated processing device for forming a skewed slot stator core using a sector sheet, characterized in that: The invention comprises a main carcass (1) in the shape of a hollow cylinder, wherein a top plate (2) is arranged above the main carcass (1), an upper pressure plate (3) is arranged on the circumference of the main carcass (1), and a lower pressure plate (4) is connected to the bottom of the main carcass (1), wherein the top plate (2) and the lower pressure plate (4) are both annular structures, and the outer diameters of the top plate (2) and the lower pressure plate (4) are both larger than the outer diameter of the main carcass (1), and an inclined slot stator core assembly (A) composed of multiple layers of fan-shaped sheets (A1) and stator pressure rings (A2) is arranged on the circumference of the main carcass (1) and between the upper pressure plate (3) and the lower pressure plate (4), and a plurality of equal-height blocks (5) are evenly arranged between the top plate (2) and the upper pressure plate (3), and the top plate (2) and the lower pressure plate (4) are detachably connected by a plurality of annularly distributed fasteners (6) for applying pressure to the inclined slot stator core assembly (A) to make it overlap; It also includes a plurality of ribs (11) arranged on the circumferential surface of the main carcass (1), a keyway is arranged on any one of the ribs (11), a guide key (7) is placed in the keyway, and the guide key (7) is used to control the skew angle of the sector piece (A1) in the skew stator core assembly (A).

2. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 1, characterized in that: An annular convex stop is provided at the outer diameter of the bottom of the main carcass (1), and an annular groove (41) matching the convex stop is provided on the lower pressure plate (4) just below the convex stop. The lower pressure plate (4) and the main carcass (1) are connected by the convex stop and the stop of the annular groove (41), and the stop is fastened by a ring-shaped fastening screw (42).

3. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 1, characterized in that: The fastener (6) comprises a double-headed screw (61) and a nut (62) matched with the double-headed screw (61); a plurality of threaded holes matched with the double-headed screw (61) are evenly distributed in an annular pattern on the lower pressure plate (4); and through holes for the double-headed screw (61) to pass through are provided on the main carcass (1) and the upper pressure plate (3); one end of the double-headed screw (61) is connected to the threaded hole on the lower pressure plate (4), and the other end passes through the top plate (2) and is fixed by the nut (62).

4. The integrated processing device for forming a skewed slot stator core using a sector sheet according to any one of claims 1 to 3, characterized in that: A plurality of lifting ribs (12) are welded on the inner wall of the main carcass (1), and the plurality of lifting ribs (12) are arranged in a crisscross pattern, and are used to cooperate with lifting equipment to transport the device together with the skewed slot stator core assembly (A) as a whole to a machining device to perform mechanical processing on the outer circle of the skewed slot stator core assembly (A).

5. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 4, characterized in that: The number of the stator pressure rings (A2) is two, which are respectively arranged at the upper and lower ends of the multi-layer sector sheet (A1), and the two stator pressure rings (A2) are respectively embedded in the lower surface of the upper pressure plate (3) and the upper surface of the lower pressure plate (4).

6. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 5, characterized in that: The upper pressing plate (3) and the lower pressing plate (4) are both stepped circular rings, and the stator pressing ring (A2) is embedded on the step surface of the stepped circular ring.

7. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 4, characterized in that: The guide key (7) is arranged in a tilted manner in the key slot according to the tilted slot angle required by the tilted slot stator core assembly (A).

8. The integrated processing device for forming a skewed slot stator core using a sector sheet according to claim 1, characterized in that: The top of the main carcass (1) is also provided with a leveling reference surface (8-1) and a rounding reference surface (8-2) both of which are semicircular ring structures, and the two ends of the leveling reference surface (8-1) and the rounding reference surface (8-2) are connected to each other.

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