A stator core

Abstract

The present invention discloses a stator core, which relates to the technical field of stator structures and includes a plurality of iron cores, a support frame, a fixing sleeve, and slot wedges; the plurality of iron cores are arranged on the support frame, the fixing sleeve is arranged outside the support frame, and the slot wedges fix the plurality of iron cores between the support frame and the fixing sleeve. It solves the problem of the structural fixation of the iron cores assembled into a complete circular iron core, and the coils of the concentrated winding can be wound on the iron cores, which not only facilitates automatic winding to improve production efficiency, but also makes the conductors arranged neatly in the iron core slots, thus greatly improving the slot filling factor; the stator core in the present invention can avoid the axial magnetic pull generated by the permanent magnets on the rotor during the application process of the stator core, resulting in axial displacement of some silicon steel sheet layers, and prevent the stator core from delaminating; the cage-type fixing structure is beneficial to the improvement of the motor power level; the stator core is closely matched with the support frame radiation ribs and there are sleeves inside and outside, increasing the heat dissipation area of the stator core, combined with the potting treatment of the thermal conductive adhesive, which is thus beneficial to heat dissipation.

Description

Technical Field

[0001] The present invention relates to the technical field of stator structures, and particularly to a stator core. Background Art

[0002] The air-gap magnetic field of a disc motor is axially distributed, and both the stator and the rotor are arranged in a disc structure. The single-stator double-rotor structure is one of the commonly used structural forms of disc motors. The single-stator double-rotor structure features placing the stator in the middle, with two rotors respectively placed on both sides of the stator. The magnetic circuit enters from one end of the stator core and exits from the other end into the air gap. Multiple stator cores (without a stator yoke) are fixed in a split-block manner. Relatively speaking, there are problems such as difficult fixation of the split-block cores and difficult heat dissipation, which limit the further improvement of its power. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a stator core to solve the problems of stator core fixation and heat dissipation.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a stator core, comprising a plurality of iron cores, a support frame, a fixing sleeve, and slot wedges; the plurality of iron cores are arranged on the support frame, the fixing sleeve is arranged outside the support frame, and the slot wedges are used to fix the plurality of iron cores between the support frame and the fixing sleeve.

[0006] Optionally, the iron core comprises multiple layers of silicon steel sheets laminated radially.

[0007] Optionally, both ends of the iron core are provided with clamping portions protruding outward, and fixing grooves are arranged in the middle of both sides of the iron core. The fixing grooves are clamped and connected with the support frame, and the slot wedges are arranged between the clamping portions of adjacent iron cores.

[0008] Optionally, the support frame comprises an annular support body, and an annular boss is arranged in the middle of the outer wall of the support body. A plurality of support bars are arranged circumferentially on the annular boss, and the iron cores are arranged between adjacent support bars.

[0009] Optionally, a plurality of slot holes are arranged at both ends of the support body.

[0010] Optionally, the fixing sleeve is of a cylindrical structure, and a plurality of support holes are arranged in the middle of the fixing sleeve. A plurality of slot holes are arranged at both ends of the fixing sleeve.

[0011] Optionally, the fixing sleeve comprises a plurality of arc fixing pieces, and the plurality of arc fixing pieces are spliced into a cylindrical structure along the circumference.

[0012] Optionally, the slot wedge is a strip-shaped body with a T-shaped cross-section.

[0013] The present invention has achieved the following technical effects compared with the prior art:

[0014] 1. Solved the problem of the structural fixation of the assembled split iron cores into a complete circular iron core. At the same time, the coils of the concentrated winding can be wound on the small iron cores in advance, which not only facilitates automatic winding and improves production efficiency, but also enables the conductors to be neatly arranged in the iron core slots, thus greatly increasing the slot filling factor;

[0015] 2. The stator iron core in the present invention can avoid the axial displacement of some silicon steel sheet layers caused by the axial magnetic pulling force generated by the permanent magnet on the rotor during the application process of the stator iron core, ensure that the back surface of the stator iron core remains flat, and prevent the stator iron core from delaminating;

[0016] 3. With a reliable cage-type fixing structure design, multiple dispersed iron cores form a cage-type fixing structure by means of an intermediate bracket, metal slot wedges on both sides, a fixing bracket, and an outer protective sleeve, which is beneficial for the motor to withstand greater torque and improve the motor power density;

[0017] 4. The middle of the stator iron core is closely fitted with the support bars, and there are sleeves inside and outside, increasing the heat dissipation area of the stator iron core. Combined with the potting treatment of the thermal conductive adhesive, it is thus beneficial for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the stator iron core of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the iron core in the stator iron core of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the support frame in the stator iron core of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the fixing sleeve in the stator iron core of the present invention; Figure 5 It is a schematic half-sectional structural diagram of the stator iron core of the present invention.

[0023] Description of the reference numerals: 1. Iron core; 2. Fixed groove; 3. Support bar; 4. Ring-shaped boss; 5. Slot hole; 6. Bracket body; 7. Slot wedge; 8. Bracket hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 shown, this embodiment provides a stator core, which includes a plurality of iron cores 1, a support frame, a fixing sleeve, and a slot wedge 7; the plurality of iron cores 1 are arranged on the support frame, the fixing sleeve is arranged outside the support frame, and the slot wedge 7 is used to fix the plurality of iron cores 1 between the support frame and the fixing sleeve.

[0026] In this specific embodiment, as Figure 1 shown in -5, the iron core 1 includes multiple layers of silicon steel sheets laminated radially. Both ends of the iron core 1 are provided with clamping portions protruding outward, and fixing grooves 2 are provided in the middle of both sides of the iron core 1. The fixing grooves 2 are clamped and connected to the support frame, and the slot wedge 7 is arranged between the clamping portions of adjacent iron cores 1.

[0027] The support frame includes an annular support body 6. A circular boss 4 is provided in the middle of the outer wall of the support body 6. A plurality of support bars 3 are arranged circumferentially on the circular boss 4. The iron core 1 is arranged between adjacent support bars 3. A plurality of slot holes 5 are provided at both ends of the support body 6.

[0028] The fixing sleeve is of a cylindrical structure. A plurality of support holes 8 are provided in the middle of the fixing sleeve. A plurality of slot holes 5 are provided at both ends of the fixing sleeve.

[0029] The fixing sleeve includes four fixing pieces. The four fixing pieces are spliced into a cylindrical structure and welded into one body.

[0030] The slot wedge 7 is a strip-shaped body with a T-shaped cross-section.

[0031] Both the fixing sleeve and the support frame are made of non-magnetic materials, and the slot wedge 7 is made of metal.

[0032] During assembly, a plurality of iron cores 1 are placed in the support frame so that the iron cores 1 are located between the support bars 3. The fixing grooves 2 of the iron cores 1 are clamped with the support bars 3. Then, the four fixing pieces are sleeved outside the support frame so that the support bars 3 are located in the support holes 8. The four fixing pieces are welded into a fixing sleeve by welding. After that, the slot wedge 7 is sequentially inserted into the slot holes 5 in the fixing sleeve and the support frame, and the slot wedge 7 is welded and fixed to the fixing sleeve and the support frame by welding.

[0033] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] Specific examples are used in this specification to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A stator core, characterized in that, It includes multiple iron cores, a support frame, a fixing sleeve and a slot wedge; the multiple iron cores are arranged on the support frame, the fixing sleeve is arranged outside the support frame, and the slot wedge is used to fix the multiple iron cores between the support frame and the fixing sleeve; Both ends of the iron core are provided with clamping portions protruding outward, and the slot wedge is arranged between the clamping portions of adjacent iron cores; The support frame includes an annular support body, a ring-shaped boss is arranged in the middle of the outer wall of the support body, a plurality of support bars are arranged circumferentially on the ring-shaped boss, the iron core is arranged between adjacent support bars, and fixing grooves are arranged in the middle of both sides of the iron core, and the fixing grooves are clamped with the support bars; The slot wedge is a strip-shaped body with a T-shaped cross section, and a plurality of slot holes are arranged at both ends of the support body; The fixing sleeve is of a cylindrical structure, a plurality of support holes are arranged in the middle of the fixing sleeve, a plurality of slot holes are arranged at both ends of the fixing sleeve, the support bars are located in the support holes, the slot wedge is sequentially inserted into the slot holes in the fixing sleeve and the support frame, and the slot wedge is welded and fixed to the fixing sleeve and the support frame.

2. The stator core according to claim 1, wherein The iron core includes multiple layers of silicon steel sheets laminated radially.

3. The stator core according to claim 1, characterized in that, The fixing sleeve includes a plurality of arc fixing pieces, and the plurality of arc fixing pieces are spliced into a cylindrical structure along the circumference.

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