CN221227234U - Rotor assembly and compressor with same - Google Patents

Abstract

The utility model relates to a rotor assembly and a compressor with the same, wherein the rotor assembly comprises a rotor iron core, an upper balance weight, a lower balance weight, an upper rivet and a lower rivet, and upper concave parts and lower concave parts are respectively arranged on the upper end surface and the lower end surface of the rotor iron core; the upper balancing weight is provided with an upper convex part, the upper convex part is arranged in the upper concave part in an interference mode, the upper balancing weight is fixed on the upper end face of the rotor core through an upper rivet, and an included angle between two ends of the upper balancing weight in the circumferential direction and the circle center of the upper balancing weight is smaller than 180 degrees; the lower balancing weight is provided with a lower convex part, the lower convex part is arranged in the lower concave part in an interference mode, the lower balancing weight is fixed on the lower end face of the rotor core through a lower rivet, and an included angle between two ends of the lower balancing weight in the circumferential direction and the circle center of the lower balancing weight is smaller than 180 degrees. The rotor assembly has a simple structure, and can effectively reduce the material cost of the balance weight and the rivet.

Description

Rotor assembly and compressor with same

Technical Field

The utility model relates to the technical field of compressors, in particular to a rotor assembly and a compressor with the rotor assembly.

Background

The motor of the compressor mainly comprises a stator fixed with the compressor shell and a rotor fixed with the compressor pump body. The rotor mainly comprises a rotor core, an upper balance block, a lower balance block and rivets, wherein end plates are respectively arranged at the upper end and the lower end of the rotor core, the upper balance block and the lower balance block are respectively arranged on the end plates at the upper part and the lower part of the rotor core, the upper balance block and the lower balance block are of circular arc structures larger than 1/2 circle, the upper balance block and the lower balance block are symmetrically arranged relative to the axis of the rotor core, the projections of the two ends of the upper balance block and the lower balance block in the axial direction of the rotor core are overlapped, the upper balance block penetrates through the two ends of the upper balance block, the two ends of the rotor core and the two ends of the lower balance block through two rivets and fixes the upper balance block, the middle part of the upper balance block and the rotor core through one rivet and fixes the upper balance block and the lower balance block through the middle part of the rotor core and the rotor core.

Therefore, the number of rivets of the rotor structure of the existing compressor is as large as four, so that the number of through holes formed in the axial direction of the rotor core is also as large as four, the cost of the rivets and materials is high, the number of through holes formed in the rotor core is also large, and the processing cost of the rotor core is increased; in addition, because the upper and lower balance weights are larger than 1/2 circle, the material cost of the upper and lower balance weights is correspondingly increased.

Disclosure of utility model

Based on the above, the utility model aims to overcome the defects of the prior art, and provides a rotor assembly which has a simple structure and can effectively reduce the material cost of a balance weight and a rivet.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The rotor assembly comprises a rotor core, an upper balance weight, a lower balance weight, an upper rivet and a lower rivet, wherein an upper concave part and a lower concave part are respectively arranged on the upper end surface and the lower end surface of the rotor core; the upper balancing weight is provided with an upper convex part, the upper convex part is arranged in the upper concave part in an interference mode, the upper balancing weight is fixed on the upper end face of the rotor core through an upper rivet, and an included angle between two ends of the upper balancing weight in the circumferential direction and the circle center of the upper balancing weight is smaller than 180 degrees; the lower balancing weight is provided with a lower convex part, the lower convex part is arranged in the lower concave part in an interference mode, the lower balancing weight is fixed on the lower end face of the rotor core through a lower rivet, and an included angle between two ends of the lower balancing weight in the circumferential direction and the circle center of the lower balancing weight is smaller than 180 degrees.

As one embodiment, the upper end surface of the rotor core is respectively provided with two upper concave parts at intervals, the bottom of the upper balancing block is respectively provided with the upper convex parts at positions corresponding to the two upper concave parts, and the two upper convex parts are respectively arranged in the two upper concave parts in an interference manner; the rotor core comprises a rotor core body, wherein the rotor core body is characterized in that two concave parts are respectively arranged on the lower end face of the rotor core at intervals, lower convex parts are respectively arranged at positions, corresponding to the two concave parts, of the top of a lower balancing weight, and the two lower convex parts are respectively arranged in the two concave parts in an interference mode.

As an implementation manner, the upper balancing weight is provided with an upper through hole in a penetrating manner along an axial direction parallel to the rotor core, the rotor core is provided with an upper mounting hole in a penetrating manner at a position corresponding to the upper through hole, and the upper rivet penetrates through the upper through hole and the upper mounting hole and fixes the upper balancing weight on the upper end face of the rotor core.

As one embodiment, the two upper protruding parts are respectively positioned at two sides of the upper through hole, and the two upper protruding parts are symmetrically arranged relative to the upper through hole; the two upper concave parts are respectively positioned at two sides of the upper mounting hole, and the two upper concave parts are symmetrically arranged relative to the upper mounting hole.

As one embodiment, the rotor core has a height H, the upper concave portion has a depth L, the upper convex portion has a height D, and the relationship between D and L satisfies: d is less than or equal to L and less than H.

In one embodiment, the upper concave part and the lower concave part are cylindrical or square groove structures, and the upper convex part and the lower convex part are cylindrical or square convex structures.

In one embodiment, the upper weight has a circular arc shape, and the lower weight has a circular arc shape.

As one embodiment, the projection of the upper weight on the lower end surface of the rotor core in the axial direction of the rotor core is disposed opposite to the lower weight in the circumferential direction of the lower end surface of the rotor core.

As one embodiment, an upper end plate is disposed between the rotor core and the upper counterweight, a lower end plate is disposed between the rotor core and the lower counterweight, and a rotor magnet is disposed inside the rotor core.

Compared with the prior art, the rotor assembly has the beneficial effects that:

The upper concave part and the lower concave part are respectively arranged on the upper end face and the lower end face of the rotor core, the upper concave part is used for fixing the upper convex part of the upper balance weight in an interference manner, and the lower concave part is used for fixing the lower convex part of the lower balance weight in an interference manner, so that the upper balance weight can be fixed on the upper end face of the rotor core through only one upper rivet, and the lower balance weight can be fixed on the lower end face of the rotor core through only one lower rivet; in the rotating process, the upper balance weight can be effectively prevented from being displaced by the combined action of the upper rivet and the upper convex part, and the lower balance weight can be effectively prevented from being displaced by the combined action of the lower rivet and the lower convex part; therefore, the upper rivet does not need to pass through the lower balance weight, and the lower rivet does not need to pass through the upper balance weight, so that the heights of the upper rivet and the lower rivet can be effectively reduced, and the quantity and the material consumption of the upper rivet and the lower rivet can be reduced. In addition, the upper balance weight and the lower balance weight are fixed without sharing the same rivet, so that the included angle between the two ends of the upper balance weight in the circumferential direction and the circle center of the upper balance weight is smaller than 180 degrees, and the included angle between the two ends of the lower balance weight in the circumferential direction and the circle center of the lower balance weight is smaller than 180 degrees, thereby effectively reducing the material consumption of the upper balance weight and the lower balance weight.

In addition, the utility model also provides a compressor which comprises the rotor assembly. According to the compressor, through structural optimization and improvement of the rotor assembly, the material cost of the upper balance weight, the lower balance weight, the upper rivet and the lower rivet can be effectively reduced.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

Drawings

FIG. 1 is an exploded view of a rotor assembly of the present utility model;

FIG. 2 is a schematic illustration of a rotor assembly according to the present utility model;

FIG. 3 is a second schematic diagram of the rotor assembly of the present utility model;

FIG. 4 is a schematic cross-sectional view of a rotor assembly of the present utility model;

fig. 5 is a schematic structural view of an upper counterweight of a rotor assembly according to the utility model.

Reference numerals illustrate: 10. a rotor core; 11. an upper mounting hole; 12. an upper concave portion; 20. an upper balance block; 21. applying a rivet; 22. an upper convex part; 23. an upper through hole; 30. a lower balance block; 31. and (5) lower rivets.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible implementations and advantages of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.

Please refer to fig. 1 to 5; the embodiment provides a rotor assembly, which comprises a rotor core 10, an upper balance weight 20, a lower balance weight 30, an upper rivet 21 and a lower rivet 31, wherein an upper concave part 12 and a lower concave part are respectively arranged on the upper end surface and the lower end surface of the rotor core 10; the upper balance block 20 is provided with an upper convex part 22, the upper convex part 22 is arranged in the upper concave part 12 in an interference manner, the upper balance block 20 is fixed on the upper end face of the rotor core 10 through an upper rivet 21, and an included angle between two ends of the upper balance block 20 in the circumferential direction and the circle center of the upper balance block is smaller than 180 degrees; the lower balancing weight 30 is provided with a lower protruding portion, the lower protruding portion is arranged in the lower recessed portion in an interference mode, the lower balancing weight 30 is fixed to the lower end face of the rotor core 10 through a lower rivet 31, and an included angle between two ends of the lower balancing weight 30 in the circumferential direction and the circle center of the lower balancing weight is smaller than 180 degrees.

Alternatively, the upper end surface of the rotor core 10 is provided with two upper concave parts 12 at intervals, the bottom of the upper balancing weight 20 is provided with two upper convex parts 22 respectively at positions corresponding to the two upper concave parts 12, and the two upper convex parts 22 are arranged in the two upper concave parts 12 in an interference manner respectively; the lower end face of the rotor core 10 is provided with two lower concave portions at intervals, the top of the lower balancing weight 30 is provided with two lower convex portions at positions corresponding to the two lower concave portions, and the two lower convex portions are arranged in the two lower concave portions in an interference mode.

In this embodiment, the upper balance weight 20 is provided with an upper through hole 23 in a manner of being parallel to the axial direction of the rotor core 10, the rotor core 10 is provided with an upper mounting hole 11 in a manner of being penetrated by a position corresponding to the upper through hole 23, and the upper rivet 21 penetrates through the upper through hole 23 and the upper mounting hole 11 and fixes the upper balance weight 20 on the upper end surface of the rotor core 10. Similarly, the lower balance weight 30 of the present embodiment is provided with a lower through hole in a penetrating manner along the axial direction parallel to the rotor core 10, the rotor core 10 is provided with a lower mounting hole in a penetrating manner at a position corresponding to the lower through hole, and the lower rivet 31 penetrates through the lower through hole and the lower mounting hole and fixes the lower balance weight 30 on the lower end surface of the rotor core 10.

Alternatively, the two upper protrusions 22 of the present embodiment are respectively located at both sides of the upper through hole 23, and the two upper protrusions 22 are symmetrically disposed with respect to the upper through hole 23; the two upper concave parts 12 are respectively positioned at two sides of the upper mounting hole 11, and the two upper concave parts 12 are symmetrically arranged relative to the upper mounting hole 11. Similarly, the two lower convex parts are respectively positioned at two sides of the lower through hole, and the two lower convex parts are symmetrically arranged relative to the lower through hole; the two lower concave parts are respectively positioned at two sides of the lower mounting hole, and the two lower concave parts are symmetrically arranged relative to the lower mounting hole.

Therefore, the upper balance weight 20 of the present embodiment can be fixed on the upper end surface of the rotor core 10 only by one upper rivet 21, and the two upper protrusions 22 are respectively in interference fit with the upper concave portion 12 on the rotor core 10, so that the upper balance weight 20 can be limited in the circumferential direction, and thus, when the rotor core 10 rotates, the upper balance weight 20 is ensured not to be thrown or displaced under the limiting action of the two upper protrusions 22. Similarly, the lower balance weight 30 can be fixed on the lower end surface of the rotor core 10 by only one lower rivet 31, and the lower balance weight 30 can be limited in the circumferential direction by performing interference fit with the lower concave part on the rotor core 10 through the two lower convex parts.

In this embodiment, the upper concave portion 12 and the lower concave portion have a cylindrical or square groove structure, and correspondingly, the upper convex portion 22 and the lower convex portion have a cylindrical or square convex structure. It should be noted that, the upper concave portion 12 and the lower concave portion may also be triangular or other shaped groove structures, and the upper convex portion 22 and the lower convex portion may be triangular or other shaped convex structures, so long as the upper convex portion 22 and the upper concave portion 12 are in interference fit, and the lower convex portion and the lower concave portion are in interference fit.

Further, the rotor core 10 has a height H, the upper concave portion 12 has a depth L, the upper convex portion 22 has a height D, and the relationship between D and L satisfies: d is less than or equal to L and less than H. In the present embodiment, the height D of the upper convex portion 22 is equal to the depth L of the upper concave portion 12, so that when the upper counterweight 20 is connected to the rotor core 10, when the upper convex portion 22 is interference-fitted in the upper concave portion 12 of the rotor core 10, the bottom of the upper counterweight 20 abuts against the upper end face of the rotor core 10, so that the connection therebetween is more compact.

Alternatively, the upper balance weight 20 has an arc-shaped structure, and the lower balance weight 30 has an arc-shaped structure. The included angles formed between the two ends of the upper balancing weight 20 and the axis of the rotor core 10 may be 120 °, 135 °, 150 °, and the like, and the included angles formed between the two ends of the lower balancing weight 30 and the axis of the rotor core 10 may be 120 °, 135 °, 150 °, and the like. In this embodiment, an included angle formed between the two ends of the upper weight 20 and the axis of the rotor core 10 is preferably 135 °, an included angle formed between the two ends of the lower weight 30 and the axis of the rotor core 1010 is preferably 135 °, and a projection of the upper weight 20 onto the lower end face of the rotor core 10 along the axial direction of the rotor core 10 is disposed opposite to the lower weight 30 in the circumferential direction of the lower end face of the rotor core 10.

Optionally, an upper end plate is disposed between the rotor core 10 and the upper balance weight 20, a lower end plate is disposed between the rotor core 10 and the lower balance weight 30, and rotor magnets are disposed inside the rotor core 10.

Thus, in this embodiment, the upper concave portion 12 and the lower concave portion are respectively provided on the upper and lower end surfaces of the rotor core 10, the upper concave portion 12 is used for interference-fixing the upper convex portion 22 of the upper counterweight 20, and the lower concave portion is used for interference-fixing the lower convex portion of the lower counterweight 30, so that the upper counterweight 20 can be fixed on the upper end surface of the rotor core 10 only by one upper rivet 21, and the lower counterweight 30 can be fixed on the lower end surface of the rotor core 10 only by one lower rivet 31; in the rotating process, the upper balance weight 20 can be effectively prevented from being displaced by the combined action of the upper rivet 21 and the upper convex part 22, and the lower balance weight 30 can be effectively prevented from being displaced by the combined action of the lower rivet 31 and the lower convex part; in this way, the upper rivet 21 does not need to pass through the lower balance weight 30, the lower rivet 31 does not need to pass through the upper balance weight 20, and the heights of the upper rivet 21 and the lower rivet 31 can be effectively reduced, so that the utility model can reduce the quantity and the material consumption of the upper rivet 21 and the lower rivet 31. In addition, the upper balance weight 20 and the lower balance weight 30 of the utility model do not need to be fixed by sharing the same rivet, so that the included angle between the two ends of the upper balance weight 20 in the circumferential direction and the circle center of the upper balance weight is smaller than 180 degrees, and the included angle between the two ends of the lower balance weight 30 in the circumferential direction and the circle center of the lower balance weight is smaller than 180 degrees, thereby effectively reducing the material consumption of the upper balance weight 20 and the lower balance weight 30.

In other embodiments, two lower mounting holes are formed through the lower balance block 30 and the rotor core 10, so that two lower rivets 31 respectively pass through the lower mounting holes and fix the two lower mounting holes together, so that a lower concave part is not required to be formed on the lower end surface of the rotor core 10, the lower balance block 30 can be fixed on the lower end surface of the rotor core 10, and an included angle between two ends of the lower balance block 30 in the circumferential direction and the center of the circle of the lower balance block can be smaller than 180 degrees.

In addition, the embodiment also provides a compressor, which comprises the rotor assembly. According to the compressor, through structural optimization and improvement of the rotor assembly, the material cost of the upper balance weight 20, the lower balance weight 30, the upper rivet 21 and the lower rivet 31 can be effectively reduced.

The above examples merely represent several embodiments of the present utility model, which are described in more detail and detail, but are not to be construed as limiting the scope of the inventive rotor assembly and compressor having the same. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (10)

1. A rotor assembly, characterized in that:

The upper end face and the lower end face of the rotor iron core are respectively provided with an upper concave part and a lower concave part;

The upper balancing weight is provided with an upper convex part, the upper convex part is arranged in the upper concave part in an interference mode, the upper balancing weight is fixed on the upper end face of the rotor core through an upper rivet, and an included angle between two ends of the upper balancing weight in the circumferential direction and the circle center of the upper balancing weight is smaller than 180 degrees; the lower balancing weight is provided with a lower convex part, the lower convex part is arranged in the lower concave part in an interference mode, the lower balancing weight is fixed on the lower end face of the rotor core through a lower rivet, and an included angle between two ends of the lower balancing weight in the circumferential direction and the circle center of the lower balancing weight is smaller than 180 degrees.

2. The rotor assembly of claim 1, wherein:

The upper end face of the rotor core is provided with two upper concave parts at intervals respectively, the positions of the bottoms of the upper balancing weights corresponding to the two upper concave parts are provided with upper convex parts respectively, and the two upper convex parts are arranged in the two upper concave parts in an interference mode respectively; the rotor core comprises a rotor core body, wherein the rotor core body is characterized in that two concave parts are respectively arranged on the lower end face of the rotor core at intervals, lower convex parts are respectively arranged at positions, corresponding to the two concave parts, of the top of a lower balancing weight, and the two lower convex parts are respectively arranged in the two concave parts in an interference mode.

3. The rotor assembly of claim 2, wherein:

The upper balance weight is provided with an upper through hole in a penetrating manner along the axial direction parallel to the rotor core, the position of the rotor core corresponding to the upper through hole is provided with an upper mounting hole in a penetrating manner, and the upper rivet penetrates through the upper through hole and the upper mounting hole and fixes the upper balance weight on the upper end face of the rotor core.

4. A rotor assembly as claimed in claim 3, wherein:

The two upper convex parts are respectively positioned at two sides of the upper through hole, and the two upper convex parts are symmetrically arranged relative to the upper through hole; the two upper concave parts are respectively positioned at two sides of the upper mounting hole, and the two upper concave parts are symmetrically arranged relative to the upper mounting hole.

5. The rotor assembly of claim 1, wherein:

The height of the rotor core is H, the depth of the upper concave part is L, the height of the upper convex part is D, and the relation between D and L satisfies the following conditions: d is less than or equal to L and less than H.

6. The rotor assembly of claim 1, wherein:

The upper concave part and the lower concave part are cylindrical or square groove structures, and the upper convex part and the lower convex part are cylindrical or square convex structures.

7. The rotor assembly of claim 1, wherein:

the upper balance weight is of an arc-shaped structure, and the lower balance weight is of an arc-shaped structure.

8. The rotor assembly of claim 7, wherein:

the projection of the upper balancing weight on the lower end face of the rotor core along the axial direction of the rotor core is opposite to the circumferential direction of the lower balancing weight on the lower end face of the rotor core.

9. The rotor assembly of claim 1, wherein:

An upper end plate is arranged between the rotor core and the upper balance weight, a lower end plate is arranged between the rotor core and the lower balance weight, and a rotor magnet is arranged inside the rotor core.

10. A compressor, characterized in that: a rotor assembly as claimed in any one of claims 1 to 9.