CN214479873U - Stator, motor, compressor and refrigeration plant - Google Patents
Stator, motor, compressor and refrigeration plant Download PDFInfo
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- CN214479873U CN214479873U CN202023229173.0U CN202023229173U CN214479873U CN 214479873 U CN214479873 U CN 214479873U CN 202023229173 U CN202023229173 U CN 202023229173U CN 214479873 U CN214479873 U CN 214479873U
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Abstract
The utility model relates to the technical field of motors, concretely relates to stator, motor, compressor and refrigeration plant. The stator comprises a stator core, a stator winding, outgoing lines and a retaining piece, the stator core comprises a yoke part and stator teeth, a stator slot gap is defined between each two adjacent stator teeth and the yoke part, and the body is provided with a first end face and a second end face; the stator winding comprises a first part, a second part and a third part, and the first part and the second part are positioned outside the stator slot; the outgoing line is electrically connected with the first part; the holder includes a first holding portion provided on the first end face, a second holding portion provided on the second end face, one of the first holding portion and the second holding portion being provided with a heat dissipating portion, and a third holding portion having both ends connected to the first holding portion and the second holding portion, respectively. Utilize the utility model discloses a stator can reduce the vibration noise of the motor including the stator, improve the efficiency of the motor including the stator.
Description
Technical Field
The utility model relates to the technical field of motors, concretely relates to stator, motor, compressor and refrigeration plant.
Background
In the related art, the motor of the rotary compressor generally adopts the interior permanent magnet motor, and in recent years, with the improvement of the power density of the motor, higher requirements are provided for the vibration noise of the motor, while the prior motor cannot meet the requirement of silence more and more.
SUMMERY OF THE UTILITY MODEL
The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:
at present, a stator core of a motor is compressed by stator punching sheets and various fasteners to form a whole, for example, the stator punching sheets are connected in an axial direction by rivets. The vibration noise generated by the motor has the following reasons:
1. because the rigidity of connection between each stator punching is low, lead to stator core's rigidity low, and then lead to the motor operation including the stator to produce great vibration noise.
2. When electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer edge of the stator core, which also causes a large noise radiation during operation of the motor including the stator.
3. In the manufacturing process of the stator, for example, when the stator is in interference fit with a compressor shell, assembly stress can be generated, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of a stator core, and cause the uneven clearance between the stator and a rotor of the motor, and finally cause the deterioration of vibration noise of the motor comprising the stator during operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
To this end, an aspect of the present invention provides a stator to reduce vibration noise of a motor including the stator, to improve efficiency of the motor including the stator.
Another aspect of the utility model provides a motor to reduce the vibration noise of motor, improve the efficiency of motor.
The utility model discloses a still another aspect provides the compressor to reduce the vibration noise of compressor, improve the efficiency of compressor.
The utility model discloses a further aspect provides refrigeration plant to reduce refrigeration plant's vibration noise, improve refrigeration plant's efficiency.
The stator comprises a stator core, the stator core comprises a body, the body comprises a yoke part and a plurality of stator teeth, a stator slot is defined between every two adjacent stator teeth and the yoke part, and the body is provided with a first end face and a second end face which are opposite in the axial direction of the stator core;
the stator winding is wound on the stator teeth and comprises a first part, a second part and a third part, the first part and the second part are positioned outside the stator slot, and the third part is positioned in the stator slot;
an outlet wire electrically connected with the first portion;
a holder, the holder comprising:
a first holding portion and a second holding portion, the first holding portion being provided on the first end surface, the second holding portion being provided on the second end surface, wherein the first holding portion covers at least a part of the first portion of the stator winding, the second holding portion covers at least a part of the second portion of the stator winding, at least one of the first holding portion and the second holding portion is provided with a heat dissipation portion, the heat dissipation portion being a heat dissipation groove or a heat dissipation hole; and
a third holding portion, at least a portion of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
Through utilizing the utility model discloses the stator to can reduce the vibration noise of the motor including the stator, improve the efficiency of the motor including the stator and improve the stability of the motor including the stator.
In some embodiments, the heat dissipating portion penetrates the at least one of the first holding portion and the second holding portion in the inside-outside direction.
In some embodiments, each of the first holding portion and the second holding portion has a third end surface and a fourth end surface opposed in an axial direction of the stator core, the heat dissipation portion is provided on the third end surface, the fourth end surface of the first holding portion is in contact with the first end surface, and the fourth end surface of the second holding portion is in contact with the second end surface.
In some embodiments, the heat dissipation part has a first edge and a second edge opposite to each other in the circumferential direction of the stator core, and the height of the heat dissipation part increases and then decreases from the first edge to the second edge in the circumferential direction of the stator core;
or each stator tooth is provided with a symmetrical plane parallel to the axial direction of the stator core, and the height of the heat dissipation part is increased and then reduced from the symmetrical plane of the stator tooth to the symmetrical plane of the adjacent stator tooth along the circumferential direction of the stator core.
In some embodiments, the number of the heat dissipation portions is multiple, the plurality of the heat dissipation portions are opposite to the plurality of the stator slots in the axial direction of the stator core one by one, the size of the first portion of each of the heat dissipation portions in the axial direction of the stator core is larger than the size of the remaining portion of the corresponding heat dissipation portion in the axial direction of the stator core, the first portion of each of the heat dissipation portions is opposite to the first center line of the corresponding stator slot in the axial direction of the stator core, and the first center line extends along the axial direction of the stator core.
In some embodiments, each of the heat dissipation portions is symmetrical with respect to the first center line of the corresponding stator slot.
In some embodiments, the third retaining portion encases at least a portion of the third portion;
optionally, the number of the third retaining portions is multiple, and the multiple stator slots are filled with the multiple third retaining portions in a one-to-one correspondence so as to cover the third portion.
The motor comprises a stator, the stator comprises a stator core, the stator core comprises a body, the body comprises a yoke part and a plurality of stator teeth, a stator slot is defined between every two adjacent stator teeth and the yoke part, and the body is provided with a first end face and a second end face which are opposite in the axial direction of the stator core;
the stator winding is wound on the stator teeth and comprises a first part, a second part and a third part, the first part and the second part are positioned outside the stator slot, and the third part is positioned in the stator slot;
an outlet wire electrically connected with the first portion;
a holder, the holder comprising:
a first holding portion and a second holding portion, the first holding portion being provided on the first end surface, the second holding portion being provided on the second end surface, wherein the first holding portion covers at least a part of the first portion of the stator winding, the second holding portion covers at least a part of the second portion of the stator winding, at least one of the first holding portion and the second holding portion is provided with a heat dissipation portion, the heat dissipation portion being a heat dissipation groove or a heat dissipation hole; and
a third holding portion, at least a portion of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
According to the utility model discloses the motor has advantages such as vibration noise is low, efficient and stability is good.
In some embodiments, the heat dissipating portion penetrates the at least one of the first holding portion and the second holding portion in the inside-outside direction.
In some embodiments, each of the first holding portion and the second holding portion has a third end surface and a fourth end surface opposed in an axial direction of the stator core, the heat dissipation portion is provided on the third end surface, the fourth end surface of the first holding portion is in contact with the first end surface, and the fourth end surface of the second holding portion is in contact with the second end surface
In some embodiments, the heat dissipation part has a first edge and a second edge opposite to each other in the circumferential direction of the stator core, and the height of the heat dissipation part increases and then decreases from the first edge to the second edge in the circumferential direction of the stator core;
or each stator tooth is provided with a symmetrical plane parallel to the axial direction of the stator core, and the height of the heat dissipation part is increased and then reduced from the symmetrical plane of the stator tooth to the symmetrical plane of the adjacent stator tooth along the circumferential direction of the stator core.
In some embodiments, the number of the heat dissipation portions is multiple, the plurality of the heat dissipation portions are opposite to the plurality of the stator slots in the axial direction of the stator core one by one, the size of the first portion of each of the heat dissipation portions in the axial direction of the stator core is larger than the size of the remaining portion of the corresponding heat dissipation portion in the axial direction of the stator core, the first portion of each of the heat dissipation portions is opposite to the first center line of the corresponding stator slot in the axial direction of the stator core, and the first center line extends along the axial direction of the stator core.
In some embodiments, each of the heat dissipation portions is symmetrical with respect to the first center line of the corresponding stator slot.
In some embodiments, the third retaining portion encases at least a portion of the third portion;
optionally, the number of the third retaining portions is multiple, and the multiple stator slots are filled with the multiple third retaining portions in a one-to-one correspondence so as to cover the third portion.
The compressor comprises a motor, the motor comprises a stator, the stator comprises a stator core, the stator core comprises a body, the body comprises a yoke part and a plurality of stator teeth, a stator slot is defined between every two adjacent stator teeth and the yoke part, and the body is provided with a first end face and a second end face which are opposite in the axial direction of the stator core;
the stator winding is wound on the stator teeth and comprises a first part, a second part and a third part, the first part and the second part are positioned outside the stator slot, and the third part is positioned in the stator slot;
an outlet wire electrically connected with the first portion;
a holder, the holder comprising:
a first holding portion and a second holding portion, the first holding portion being provided on the first end surface, the second holding portion being provided on the second end surface, wherein the first holding portion covers at least a part of the first portion of the stator winding, the second holding portion covers at least a part of the second portion of the stator winding, at least one of the first holding portion and the second holding portion is provided with a heat dissipation portion, the heat dissipation portion being a heat dissipation groove or a heat dissipation hole; and
a third holding portion, at least a portion of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
According to the utility model discloses compressor has advantages such as vibration noise is low, efficient and stability is good.
In some embodiments, the heat dissipating portion penetrates the at least one of the first holding portion and the second holding portion in the inside-outside direction.
In some embodiments, each of the first holding portion and the second holding portion has a third end surface and a fourth end surface opposed in an axial direction of the stator core, the heat dissipation portion is provided on the third end surface, the fourth end surface of the first holding portion is in contact with the first end surface, and the fourth end surface of the second holding portion is in contact with the second end surface.
In some embodiments, the heat dissipation part has a first edge and a second edge opposite to each other in the circumferential direction of the stator core, and the height of the heat dissipation part increases and then decreases from the first edge to the second edge in the circumferential direction of the stator core;
or each stator tooth is provided with a symmetrical plane parallel to the axial direction of the stator core, and the height of the heat dissipation part is increased and then reduced from the symmetrical plane of the stator tooth to the symmetrical plane of the adjacent stator tooth along the circumferential direction of the stator core.
In some embodiments, the number of the heat dissipation portions is multiple, the plurality of the heat dissipation portions are opposite to the plurality of the stator slots in the axial direction of the stator core one by one, the size of the first portion of each of the heat dissipation portions in the axial direction of the stator core is larger than the size of the remaining portion of the corresponding heat dissipation portion in the axial direction of the stator core, the first portion of each of the heat dissipation portions is opposite to the first center line of the corresponding stator slot in the axial direction of the stator core, and the first center line extends along the axial direction of the stator core.
In some embodiments, each of the heat dissipation portions is symmetrical with respect to the first center line of the corresponding stator slot.
In some embodiments, the third retaining portion encases at least a portion of the third portion;
optionally, the number of the third retaining portions is multiple, and the multiple stator slots are filled with the multiple third retaining portions in a one-to-one correspondence so as to cover the third portion.
According to the utility model discloses refrigeration plant includes the compressor, the compressor includes the motor, the motor includes the stator, the stator includes stator core, stator core includes the body, the body includes yoke portion and a plurality of stator tooth, delimits the stator slot between two adjacent stator teeth and the yoke portion, wherein the body has relative first terminal surface and second terminal surface in stator core's axial;
the stator winding is wound on the stator teeth and comprises a first part, a second part and a third part, the first part and the second part are positioned outside the stator slot, and the third part is positioned in the stator slot;
an outlet wire electrically connected with the first portion;
a holder, the holder comprising:
a first holding portion and a second holding portion, the first holding portion being provided on the first end surface, the second holding portion being provided on the second end surface, wherein the first holding portion covers at least a part of the first portion of the stator winding, the second holding portion covers at least a part of the second portion of the stator winding, at least one of the first holding portion and the second holding portion is provided with a heat dissipation portion, the heat dissipation portion being a heat dissipation groove or a heat dissipation hole; and
a third holding portion, at least a portion of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
According to the utility model discloses refrigeration plant has advantages such as vibration noise is low, efficient and stability is good.
In some embodiments, the heat dissipating portion penetrates the at least one of the first holding portion and the second holding portion in the inside-outside direction.
In some embodiments, each of the first holding portion and the second holding portion has a third end surface and a fourth end surface opposed in an axial direction of the stator core, the heat dissipation portion is provided on the third end surface, the fourth end surface of the first holding portion is in contact with the first end surface, and the fourth end surface of the second holding portion is in contact with the second end surface.
In some embodiments, the heat dissipation part has a first edge and a second edge opposite to each other in the circumferential direction of the stator core, and the height of the heat dissipation part increases and then decreases from the first edge to the second edge in the circumferential direction of the stator core;
or each stator tooth is provided with a symmetrical plane parallel to the axial direction of the stator core, and the height of the heat dissipation part is increased and then reduced from the symmetrical plane of the stator tooth to the symmetrical plane of the adjacent stator tooth along the circumferential direction of the stator core.
In some embodiments, the number of the heat dissipation portions is multiple, the plurality of the heat dissipation portions are opposite to the plurality of the stator slots in the axial direction of the stator core one by one, the size of the first portion of each of the heat dissipation portions in the axial direction of the stator core is larger than the size of the remaining portion of the corresponding heat dissipation portion in the axial direction of the stator core, the first portion of each of the heat dissipation portions is opposite to the first center line of the corresponding stator slot in the axial direction of the stator core, and the first center line extends along the axial direction of the stator core.
In some embodiments, each of the heat dissipation portions is symmetrical with respect to the first center line of the corresponding stator slot.
In some embodiments, the third retaining portion encases at least a portion of the third portion;
optionally, the number of the third retaining portions is multiple, and the multiple stator slots are filled with the multiple third retaining portions in a one-to-one correspondence so as to cover the third portion.
Drawings
Fig. 1 is a schematic structural view of a stator according to an embodiment of the present invention (a holder is not shown).
Fig. 2 is a perspective view of a stator core according to an embodiment of the present invention.
Fig. 3 is a top view of a stator core according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a stator according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of another view angle of the stator according to an embodiment of the present invention
Fig. 6 is a schematic structural diagram of a compressor according to an embodiment of the present invention.
Reference numerals: a stator 1; a stator core 10; a body 110; a yoke 101; an outer edge 1011; stator teeth 102; a tooth 1021; tooth shoes 1022; an inner edge 1023; a stator slot 103; first end face 104 (1101); second end face 105 (1102); a stator winding 20; a first portion 201; a second portion 202; a third portion 203; a holder 30; an inner edge 3001; an outer rim 3002; a first holding portion 301; a third end face 3011; a fourth end face 3012; a heat dissipation portion 3013; an outer edge 3014; a first edge 30131; a second edge 30132; a second holding portion 302; an outer rim 3021; a third holding portion 303; a first end portion 3031; a second end portion 3032; an inner edge 3033; an outlet 40; a compressor 100; a motor 1000; a housing 1001; a rotor 1002; a crankshaft 1003; a main bearing 1004; a cylinder 1005; a piston 1006; the sub-bearing 1007.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 to 5, a stator 1 according to an embodiment of the present invention includes a stator core 10, a stator winding 20, lead-out wires 40, and a holder 30. The stator core 10 includes a body 110, the body 110 includes a yoke portion 101 and a plurality of stator teeth 102, a stator slot 103 is defined between two adjacent stator teeth 102 and the yoke portion 101, and the stator winding 20 is wound on the stator teeth 102. The body 110 has a first end face 104 and a second end face 105 opposed to each other in the axial direction of the stator core 10. The stator winding 20 comprises a first portion 201, a second portion 202 and a third portion 203, the first portion 201 and the second portion 202 being located outside the stator slot 103, the third portion 203 being located inside the stator slot 103. The lead-out wire 40 is electrically connected to the first portion 201.
As shown in fig. 4 and 5, the holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, the first holding portion 301 being provided on the first end face 104, and the second holding portion 302 being provided on the second end face 105. The first holding portion 301 covers at least a part of the first portion 201 of the stator winding 20, and the second holding portion 302 covers at least a part of the second portion 202 of the stator winding 20. At least one of the first holding portion 301 and the second holding portion 302 is provided with a heat dissipation portion 3013, and the heat dissipation portion 3013 is a heat dissipation groove or a heat dissipation hole.
At least a part of the third holding portion 303 is provided in the stator slot 103. The third holding portion 303 has a first end portion 3031 and a second end portion 3032 opposite in the axial direction of the stator core 10, the first end portion 3031 of the third holding portion 303 is connected to the first holding portion 301, and the second end portion 3032 of the third holding portion 303 is connected to the second holding portion 302.
In the prior art, a stator core is formed by compressing stator laminations and various fasteners into a whole, for example, the stator laminations are connected in an axial direction by rivets. Firstly, the rigidity of the stator core is low due to the low connection rigidity between the stator punching sheets, and further, a motor including the stator generates large vibration noise when running. Secondly, when electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer edge of the stator core, which also causes large noise radiation during operation of the motor including the stator. Finally, assembly stress can be generated during the manufacturing process of the stator, for example, when the stator is in interference fit with a compressor shell, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of the stator core, and cause the uneven gap between the stator and the rotor of the motor, and finally cause the vibration noise of the motor comprising the stator to be worsened during the operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.
The stator 1 according to the embodiment of the present invention is configured such that the first holding portion 301 and the second holding portion 302 are connected by the third holding portion 303 so that the holder 30 is integrated by providing the first holding portion 301 on the first end surface 104 of the body 110 of the stator core 10 and the second holding portion 302 on the second end surface 105. The first holding portion 301 covers at least a part of the first portion 201 of the stator winding 20, the second holding portion 302 covers at least a part of the second portion 202 of the stator winding 20, and at least a part of the third holding portion 303 is disposed in the stator slot 103, so that the first holding portion 301, the second holding portion 302, and the third holding portion 303 can be effectively ensured to have a certain thickness, and thus, the first holding portion 301 and the second holding portion 302 can be used for clamping (pressing) a plurality of stator laminations of the stator core 10 in the axial direction of the stator core 10, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be remarkably improved, and the rigidity of the stator core 10 is remarkably improved.
Thus, not only vibration noise generated due to low connection rigidity of the plurality of stator segments of the stator core 10, but also noise radiation generated due to deformation of the yoke portion 101 by electromagnetic force (e.g., deformation of the outer circumferential surface of the stator core 10) and vibration noise generated due to deformation caused by assembling the stator 1 (e.g., deformation of the inner diameter of the stator core 10, i.e., deformation of the inner circumferential surface of the stator core 10) can be significantly reduced or even eliminated.
Furthermore, by significantly improving the rigidity of the stator core 10, the deformation of the stator core 10 can be significantly reduced or even eliminated, so that the stress core loss due to the deformation of the stator core 10 can be significantly reduced or even eliminated, so as to significantly improve the efficiency of the motor including the stator 1.
Since the end portion of the stator winding 20 close to the lead-out wire 40 generally has a higher winding temperature, by providing the heat dissipation portion 3013 (heat dissipation groove or heat dissipation hole) on one of the first holding portion 201 and the second holding portion 202, it is possible to facilitate heat dissipation of the end portion of the stator winding 20 close to the lead-out wire 40, and to avoid the end portion of the stator winding 20 close to the lead-out wire 40 from being overheated to affect reliable operation of the motor. Wherein the respective one of the first portion 201 and the second portion 202 of the stator winding 20 is close to the lead-out wire 40, i.e. the respective one of the first portion 201 and the second portion 202 of the stator winding 20 comprises the end of the stator winding 20 close to the lead-out wire 40. The respective one of the first portion 201 and the second portion 202 of the stator winding 20 refers to: one of the first portion 201 and the second portion 202 that is covered by the one of the first holding portion 201 and the second holding portion 202.
Therefore, by using the stator 1 according to the embodiment of the present invention, it is possible to reduce vibration noise of the motor including the stator 1, improve efficiency of the motor including the stator 1, and improve stability of the motor including the stator 1.
As shown in fig. 1 to 5, a stator 1 according to an embodiment of the present invention includes a stator core 10, a stator winding 20, and a holder 30.
The stator core 10 includes a body 110, and the body 110 includes a yoke portion 101 and a plurality of stator teeth 102. The stator teeth 102 include a tooth portion 1021 and a tooth shoe 1022. The first end face 104 and the second end face 105 of the body 10 are end faces of the stator core 10 that are opposite in the axial direction thereof. That is, the stator core 10 has a first end face 1101 and a second end face 1102 opposed in the axial direction thereof. The first end 1101 of the body 110 is the first end 104 of the stator core 10, and the second end 1102 of the body 110 is the second end 105 of the stator core 10. The axial direction of the stator core 10 is indicated by an arrow a in fig. 1.
Alternatively, a plurality of stator teeth 102 are provided on the yoke portion 101 at intervals in the circumferential direction of the stator core 10. A stator slot 103 is defined between two adjacent stator teeth 102 and the yoke 101, i.e., the stator core 10 has a plurality of stator slots 103. The lead-out wire 40 is electrically connected to the first portion 201.
The stator winding 20 is wound on the stator teeth 102, and the stator winding 20 includes a first portion 201, a second portion 202, and a third portion 203. Wherein the first portion 201 and the second portion 202 are located outside the stator slot 103 and the third portion 203 is located inside the stator slot 103. For example, the first portion 201 protrudes upward out of the stator slot 103, the second portion 202 protrudes downward out of the stator slot 103, the first end face 104 is an upper surface of the stator core 10 (the body 110), the second end face 105 is a lower surface of the stator core 10 (the body 110), and an axial direction of the stator core 10 coincides with an up-down direction. The up-down direction is shown by arrow B in fig. 2.
As shown in fig. 4 and 5, the holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, the first holding portion 301 being provided on the first end face 104, and the second holding portion 302 being provided on the second end face 105. The third holding portion 303 has a first end portion 3031 and a second end portion 3032 opposite in the axial direction of the stator core 10, the first end portion 3031 of the third holding portion 303 is connected to the first holding portion 301, and the second end portion 3032 of the third holding portion 303 is connected to the second holding portion 302.
For example, the first holding portion 301 is located above the second holding portion 302, the first holding portion 301 is provided on the upper end surface of the stator core 10, and the second holding portion 302 is provided on the lower end surface of the stator core 10. The upper end of the third holding portion 303 is connected to the first holding portion 301, and the lower end of the third holding portion 303 is connected to the second holding portion 302. The lead wires 40 are disposed adjacent to the first holding portion 301, the first portions 201 of the stator windings 40 are disposed adjacent to the lead wires 40, and accordingly, the heat dissipation portion 3013 is disposed on the first holding portion 301.
In some embodiments, the retainer 30 is integrally injection molded, i.e., the first retaining portion 301, the second retaining portion 302, and the third retaining portion 303 are integrally injection molded. The integral injection molding of the retainer 30 is beneficial to further improving the connection rigidity of the plurality of stator laminations of the stator core 10, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.
Since the resin material is mixed by an optimum compounding ratio of the specific material, it is possible to achieve a more desirable material rigidity and injection flow effect, and therefore, it is preferable that the holder 30 is a resin material.
Specifically, the stator core 10 may be formed by laminating a plurality of stator laminations, winding the stator winding 20 around the stator core 10, and injection molding the holder 30 on the stator core 10 and the stator winding 20.
As shown in fig. 4 and 5, in some embodiments, the heat dissipation portion 3013 penetrates at least one of the first holding portion 301 and the second holding portion 302 in the inside-outside direction. That is, the heat dissipation portion 3013 is a through groove or a through hole. Not only can the thickness of the portion of the one of the first holding portion 301 and the second holding portion 302 that covers the stator winding 20 be further reduced, so that the end portion of the stator winding 20 near the lead wires 40 can be more effectively radiated to further improve the reliability of the motor including the stator 1, but also when the holder 30 is integrally injection-molded, the heat radiating portion 3013 penetrates through at least one of the first holding portion 301 and the second holding portion 302 in the inside-outside direction, so that the difficulty of injection-molding of the holder 30 can be reduced.
Here, inward refers to a direction adjacent to the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10, and outward refers to a direction away from the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10. The inward and outward directions are indicated by arrows C in fig. 3. When the stator 1 is assembled with the rotor, the inner edge is adjacent to the rotor with respect to the outer edge.
As shown in fig. 4 and 5, in some embodiments, one of the first holding portion 301 and the second holding portion 302 has a third end face 3011 and a fourth end face 3012 that are opposed in the axial direction of the stator core 10, the heat dissipation portion 3013 is provided on the third end face 3011, the fourth end face 3012 of the first holding portion 301 is in contact with the first end face 104, and the fourth end face of the second holding portion 302 is in contact with the second end face 105. In other words, the end portion of the heat dissipation portion 3013 remote from the stator core 10 is open, so that the end portion of the stator winding 20 close to the lead wires 40 can dissipate heat through the end portion of the heat dissipation portion 3013 remote from the stator core 10, further contributing to heat dissipation at the end portion of the stator winding 20 close to the lead wires 40. Further, when the holder 30 is integrally injection-molded, an end of the heat dissipation portion 3013 remote from the body 110 is open. Thereby, not only can the partial thickness of the one of the first holding portion 301 and the second holding portion 302 covering the stator winding 20 be further reduced, so that the end portion of the stator winding 20 close to the lead wire 40 can be more effectively radiated to further improve the reliability of the motor including the stator 1, but also when the holder 30 is integrally injection-molded, the end portion of the heat radiating portion 3013 away from the stator core 10 is opened, so that the difficulty of injection-molding the holder 30 can be further reduced.
For example, the first holding portion 301 is provided above the second holding portion 302, and the first holding portion 301 has a third end surface 3011 (upper end surface) and a fourth end surface 3012 (lower end surface) that are opposed to each other in the axial direction of the stator core 10. The fourth end surface 3012 of the first holding portion 301 is in contact with the first end surface 104 (upper end surface) of the stator core 10, the heat dissipation portion 3013 is provided on the third end surface 3011, and the upper end portion of the heat dissipation portion 3013 is open.
As shown in fig. 4 and 5, in some embodiments, the heat dissipation part 3013 has a first edge (first edge) 30131 and a second edge (second edge) 30132 opposite to each other in the circumferential direction of the stator core 10, and the height of the heat dissipation part 3013 increases and then decreases from the first edge 30131 to the second edge 30132 in the circumferential direction of the stator core 10.
In some embodiments, each stator tooth 102 has a plane of symmetry parallel to the axial direction of the stator core 10, and the height of the heat sink portion increases and then decreases from the plane of symmetry of the stator tooth 102 to the plane of symmetry of the stator tooth 102 adjacent to the stator tooth 102 in the circumferential direction of the stator core 10.
The height of the heat dissipation portion 3013 means: the heat dissipation portion 3013 has a dimension in the axial direction of the stator core 10. The height of the heat dissipation portion 3013 increases and then decreases from the first edge 30131 to the second edge 30132 in the circumferential direction of the stator core 10, or the height of the heat dissipation portion increases and then decreases from the plane of symmetry of the stator tooth 102 to the plane of symmetry of the stator tooth 102 adjacent to the stator tooth 102 in the circumferential direction of the stator core 10, so that the heat dissipation portion 3013 is substantially a V-shaped groove or a triangular hole.
This can ensure that the one of the first holding portion 301 and the second holding portion 302 covers the corresponding one of the first portion 201 and the second portion 202 while maximally increasing the size of the heat dissipation portion 3013. Thereby, not only can the thickness of the portion of the one of the first holding portion 301 and the second holding portion 302 that covers the stator winding 20 be further reduced, so that the end portion of the stator winding 20 near the lead wires 40 can be more effectively radiated to further improve the reliability of the motor including the stator 1, but also when the holder 30 is integrally injection molded, the difficulty of injection molding of the holder 30 can be further reduced.
As shown in fig. 4 and 5, in some embodiments, the heat dissipation portion 3013 is a plurality of heat dissipation portions 3013, the plurality of heat dissipation portions 3013 are in one-to-one correspondence with the plurality of stator slots 103 in the axial direction of the stator core 10, and a dimension of a first portion of each heat dissipation portion 3013 in the axial direction of the stator core 10 is larger than a dimension of the remaining portion of the corresponding heat dissipation portion 3013 in the axial direction of the stator core 10. In other words, for the same heat dissipation portion 3013, the dimension of the first portion of the heat dissipation portion 3013 in the axial direction of the stator core 10 is larger than the dimension of the remaining portion of the heat dissipation portion 3013 in the axial direction of the stator core 10.
The first portion of each heat dissipation portion 3013 is opposed to a first center line of the corresponding stator slot 103 (the stator slot 103 opposed to the heat dissipation portion 3013 in the axial direction of the stator core 10) in the axial direction of the stator core 10, the first center line of the stator slot 103 extending in the axial direction of the stator core. This first centre line of the stator slot 103 is located between (in the middle of) two adjacent stator teeth 102 in the circumferential direction of the stator core 10, i.e. the first centre line of the stator slot 103 is equidistant from the two stator teeth 102 corresponding to this stator slot 103 in the circumferential direction of the stator core 10. This first portion of the heat dissipation portion 3013 is located between (in the middle of) two adjacent stator windings 20 in the circumferential direction of the stator core 10.
Thereby, not only can the thickness of the portion of the one of the first holding portion 301 and the second holding portion 302 that covers the stator winding 20 be further reduced, so that the end portion of the stator winding 20 near the lead wires 40 can be more effectively radiated to further improve the reliability of the motor including the stator 1, but also when the holder 30 is integrally injection molded, the difficulty of injection molding of the holder 30 can be further reduced.
As shown in fig. 4 and 5, in some embodiments, each heat sink portion 3013 is symmetrical about a first centerline of the corresponding stator slot 103. Thereby, not only can the partial thickness of the one of the first holding portion 301 and the second holding portion 302 covering the stator winding 20 be further reduced, so that the end portion of the stator winding 20 near the lead-out wire 40 can be more effectively radiated to further improve the reliability of the motor including the stator 1, but also when the holder 30 is integrally injection-molded, each of the heat radiating portions 3013 is symmetrical with respect to the first center line of the corresponding stator slot 103, and the difficulty of injection-molding the holder 30 can be further reduced.
As shown in fig. 4 and 5, in some embodiments, third retainer 303 encases at least a portion of third portion 203. Alternatively, the third holding portion 303 is plural, and the plural third holding portions 303 fill the plural stator slots 103 in one-to-one correspondence so as to cover the third portion 203. In this way, the thickness of the third holding portion 303 can be significantly increased in the inward and outward directions of the stator core 10, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved. Further, when the holder 30 is integrally injection molded, the injection molding difficulty of the holder 30 can be reduced by filling the third holding portion 303 with the stator slot 103.
As shown in fig. 4 and 5, the outer edge 3014 (outer edge) of the first holding portion 301 is located inside the outer edge 1011 of the yoke portion 101, and the outer edge 3021 (outer edge) of the second holding portion 302 is located inside the outer edge 1011 of the yoke portion 101. When the stator 1 is assembled with the compressor shell, the outer edge 101 of the yoke part 101 of the stator core 10 is in contact with the shell of the compressor, so that the outer edge 3014 of the first holding part 301 is positioned inside the outer edge 1011 of the yoke part 101, and the outer edge 3021 of the second holding part 302 is positioned inside the outer edge 1011 of the yoke part 101, when the stator 1 is assembled with the shell of the compressor, the outer edge 3014 of the first holding part 301 and the outer edge 3021 of the second holding part 302 are prevented from being in direct contact with the shell of the compressor, and therefore, the situation that the retainer 30 is cracked and generates powder scraps during assembly, further the pump body of the compressor is locked, faults occur and the refrigeration effect of the compressor is influenced is avoided.
Alternatively, each of the first holding portion 301 and the second holding portion 302 is annular, the outer diameter of the first holding portion 301 is smaller than the outer diameter of the yoke portion 101, and the outer diameter of the second holding portion 302 is smaller than the outer diameter of the yoke portion 101. That is, the outer edge 3013 of the first holding portion 301 is located inside the outer edge 1011 of the yoke portion 101, and the outer edge 3021 of the second holding portion 302 is located inside the outer edge 1011 of the yoke portion 101.
By making each of the first holding portion 301 and the second holding portion 302 annular, the plurality of stator laminations of the stator core 10 can be sandwiched better in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be significantly improved, and the rigidity of the stator core 10 can be significantly improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved. Further, when the retainer 30 is integrally injection-molded, each of the first holding portion 301 and the second holding portion 302 is annular in shape, and the difficulty of injection-molding the retainer 30 can be reduced.
Alternatively, the inner edge 3033 (inner edge) of the third holding portion 303 is located outside the inner edge 1023 (inner edge) of the tooth shoe 1022 of the stator tooth 102. Thus, the inner edge 1023 of the stator tooth 102 is not covered by the third holding part 303, so that the third holding part 303 can be prevented from influencing the assembly of the rotor, the motor can be better cooled, and the heat accumulation in the motor and the influence on the motor insulation system can be avoided.
As shown in fig. 6, the present invention further provides a motor 1000. According to the utility model discloses motor 1000 includes according to the utility model discloses the stator 1 of above-mentioned embodiment. Therefore, according to the utility model discloses motor 1000 has advantages such as vibration noise is low, efficient and stability is good.
It will be appreciated by those skilled in the art that the motor 1000 according to embodiments of the present invention further includes a rotor 1002. With the number of stator slots 104 of the stator 1 being Z, the number of pole pairs of the rotor 1002 being P, the ratio of Z to 2P is equal to 3/2 or 6/5 or 6/7. The proportional relation between the number Z of the stator slots 104 and the number P of the pole pairs of the rotor is defined, and then the pole slot matching of the motor 1000 is defined, wherein when the number P of the pole pairs of the rotor 1002 is defined, then the number of the pole pairs of the rotor 1002 is 2P, that is, the motor 1000 can be a 6-pole 9-slot motor, a 4-pole 6-slot motor, an 8-pole 12-slot motor, a 10-pole 12-slot motor, and the motor 1000 of the above type can effectively reduce armature iron loss, promote magnetic flux, and further promote the efficiency of the motor 1000.
Preferably, the inner diameter of the stator core 10 is Di, the rated torque of the motor 1000 is T, and the unit volume torque of the rotor 1002 is TPV, which satisfy the following relation: t × Di of 5.18 × 10-7 ≤-3×TPV-1≤1.17×10-6，5kN·m·m-3≤TPV≤45kN·m·m-3(ii) a The rated torque T of the motor 1000 is expressed in N · m, the inner diameter Di of the stator core 10 is expressed in mm, and the unit volume torque TPV of the rotor 1002 is expressed in kN · m ″-3。
In this embodiment, the rated torque of the motor 1000 is T, the inner diameter of the stator core 10 is Di, and the torque per unit volume of the rotor 1002 is TPV, and satisfies the condition that T × Di is not less than 5.18 × 10-7-3×TPV-1≤1.17×10-6The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3By defining the rated torque T of the motor 1000The value range of the internal diameter Di of the stator core 10 and the unit volume torque TPV of the rotor 1002 enables the motor 1000 to meet the power requirement of the compressor, and in addition, the motor 1000 and the compressor 100 which adopt the rotor 1002 can effectively reduce the magnetic leakage of the rotor 1002, increase the utilization rate of the permanent magnet and improve the efficiency of the motor 1000.
Preferably, a side of the plurality of tooth shoes 103 facing the rotor encloses an inner circumferential surface of the stator 1, and a ratio of a diameter of the inner circumferential surface of the stator 1 to a diameter of an outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.58.
In this embodiment, the ratio of the diameter of the inner peripheral surface of the stator 1 to the diameter of the outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.57 so that the motor has high cost performance.
The utility model discloses still provide compressor 100. The compressor 100 according to the embodiment of the present invention includes the motor 1000 according to the above embodiment of the present invention.
Therefore, the compressor 100 according to the embodiment of the present invention has the advantages of low vibration noise, high efficiency, good stability, etc.
It can be understood by those skilled in the art that the compressor 100 according to the embodiment of the present invention further includes a housing 1001, a crankshaft 1022, a main bearing 102, a cylinder 103, a piston 104, and a sub-bearing 105, as shown in fig. 6. The components of the housing, crankshaft 1022, main bearing 102, cylinder 103, piston 104, and secondary bearing 105 may be known and are not relevant to the inventive aspects of the present application and therefore will not be described in detail.
The utility model discloses still provide refrigeration plant. According to the utility model discloses refrigeration plant includes according to the above-mentioned embodiment of the utility model discloses compressor 100.
Therefore, according to the utility model discloses refrigeration plant has advantages such as vibration noise is low, efficient and stability is good.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A stator, comprising:
the stator core comprises a body, the body comprises a yoke part and a plurality of stator teeth, and a stator slot is defined between every two adjacent stator teeth and the yoke part, wherein the body is provided with a first end face and a second end face which are opposite in the axial direction of the stator core;
the stator winding is wound on the stator teeth and comprises a first part, a second part and a third part, the first part and the second part are positioned outside the stator slot, and the third part is positioned in the stator slot;
an outlet wire electrically connected with the first portion;
a holder, the holder comprising:
a first holding portion and a second holding portion, the first holding portion being provided on the first end surface, the second holding portion being provided on the second end surface, wherein the first holding portion covers at least a part of the first portion of the stator winding, the second holding portion covers at least a part of the second portion of the stator winding, at least one of the first holding portion and the second holding portion is provided with a heat dissipation portion, the heat dissipation portion being a heat dissipation groove or a heat dissipation hole; and
a third holding portion, at least a portion of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion.
2. The stator according to claim 1, wherein the heat radiating portion penetrates the at least one of the first holding portion and the second holding portion in an inside-outside direction.
3. The stator according to claim 1 or 2, wherein each of the first holding portion and the second holding portion has a third end face and a fourth end face that are opposite in an axial direction of the stator core, the heat dissipation portion is provided on the third end face, the fourth end face of the first holding portion is in contact with the first end face, and the fourth end face of the second holding portion is in contact with the second end face.
4. The stator according to claim 1 or 2, wherein the heat dissipation part has first and second opposite edges in a circumferential direction of the stator core, and a height of the heat dissipation part increases and then decreases from the first edge to the second edge in the circumferential direction of the stator core;
or each stator tooth is provided with a symmetrical plane parallel to the axial direction of the stator core, and the height of the heat dissipation part is increased and then reduced from the symmetrical plane of the stator tooth to the symmetrical plane of the adjacent stator tooth along the circumferential direction of the stator core.
5. The stator according to claim 4, wherein the plurality of heat dissipation portions are provided, the plurality of heat dissipation portions are arranged in one-to-one correspondence with the plurality of stator slots in the axial direction of the stator core, a first portion of each heat dissipation portion has a dimension in the axial direction of the stator core that is larger than a dimension in the axial direction of the stator core of a remaining portion of the corresponding heat dissipation portion, the first portion of each heat dissipation portion is arranged in correspondence with a first center line of the corresponding stator slot in the axial direction of the stator core, and the first center line extends in the axial direction of the stator core.
6. The stator as claimed in claim 5 wherein each of the heat sink portions is symmetrical with respect to the first center line of the corresponding stator slot.
7. The stator according to claim 1 or 2, wherein the third holding portion covers at least a part of the third portion;
optionally, the number of the third retaining portions is multiple, and the multiple stator slots are filled with the multiple third retaining portions in a one-to-one correspondence so as to cover the third portion.
8. An electrical machine comprising a stator according to any one of claims 1-7.
9. Compressor, characterized in that it comprises an electric motor, said electric motor being according to claim 8.
10. Refrigeration device, characterized in that it comprises a compressor, said compressor being a compressor according to claim 9.
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|---|---|---|---|
| CN202023229173.0U CN214479873U (en) | 2020-12-28 | 2020-12-28 | Stator, motor, compressor and refrigeration plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023229173.0U CN214479873U (en) | 2020-12-28 | 2020-12-28 | Stator, motor, compressor and refrigeration plant |
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| CN214479873U true CN214479873U (en) | 2021-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142464A1 (en) * | 2020-12-28 | 2022-07-07 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and refrigeration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142464A1 (en) * | 2020-12-28 | 2022-07-07 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and refrigeration device |
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