CN213402603U

CN213402603U - Motor rotor and compressor

Info

Publication number: CN213402603U
Application number: CN202022501729.0U
Authority: CN
Inventors: 黄之敏; 周韬
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-08
Anticipated expiration: 2030-11-02

Abstract

The utility model provides an electric motor rotor and compressor, wherein, electric motor rotor includes: a rotor core; the rotor core is provided with a plurality of vent holes and at least one silencing cavity, the vent holes are arranged around the axial direction of the rotor core and penetrate through the two opposite ends of the rotor core, and the silencing cavity is arranged beside the vent holes and is a closed columnar cavity; the two ends of the columnar cavity are sealed in the rotor core; or at least one end of the columnar cavity is an open end, and the open end is sealed by a component on the end face of the rotor core. In the motor rotor and the compressor that this application provided, through set up the amortization chamber on rotor core, and will the amortization chamber sets up to confined column cavity, not only can avoid the pump body because of setting up the structure that the amortization chamber caused and interfere, can reduce the air current noise of compressor moreover, improves the noise and the vibration of compressor effectively.

Description

Motor rotor and compressor

Technical Field

The application relates to the technical field of compressors, in particular to a motor rotor and a compressor.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, is a heart of a refrigeration system, sucks low-temperature low-pressure refrigerant gas from an air suction pipe, utilizes a motor to operate and drive a piston to compress the low-temperature low-pressure refrigerant gas, and then discharges the high-temperature high-pressure refrigerant gas to an exhaust pipe, thereby providing power for a refrigeration cycle.

The existing compressor generally comprises a shell, a motor assembly and a pump body assembly, wherein the motor assembly and the pump body assembly are in driving connection and are arranged in the shell. The motor assembly comprises a stator and a rotor, and the rotor is fixed in the stator through a rotating shaft.

At present, the running noise of the compressor is an index which is very concerned by refrigeration product enterprises and consumers, low noise and low vibration are inevitable trends of the compressor, and the noise requirement of the compressor in the market is higher and higher. For this reason, compressors are generally provided with a resonant muffling chamber on the pump body to reduce the noise of the air flow.

However, the pump body is provided with a large number of screw holes, vent holes, rivet avoiding holes, core adjusting screw counter bores and the like, so that the space for arranging the resonance silencing cavity is very limited, and the structural interference is easy to occur by adding the resonance silencing cavity.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims to provide an electric motor rotor and compressor has overcome prior art's difficulty and has improved, not only can improve the air current noise, can avoid the pump body to cause the structure to interfere because of setting up the resonance amortization chamber moreover.

According to an aspect of the present invention, there is provided an electric motor rotor, comprising: a rotor core;

the rotor core is provided with a plurality of vent holes and at least one silencing cavity, the vent holes are arranged around the axial direction of the rotor core and penetrate through the two opposite ends of the rotor core, and the silencing cavity is arranged beside the vent holes and is a closed columnar cavity;

the two ends of the columnar cavity are sealed in the rotor core; or

At least one end of the columnar cavity is an open end, and the open end is sealed by a component on the end face of the rotor core.

Optionally, in the motor rotor, the component on the end face of the rotor core is a rotor end plate and/or a balance weight.

Optionally, in the motor rotor, a single sound-deadening chamber communicates with at least one of the vent holes.

Optionally, in the motor rotor, a single vent hole communicates with a plurality of the noise reduction chambers.

Optionally, in the motor rotor, at least one communicating groove is provided between the silencing cavity and the vent hole, and the silencing cavity and the vent hole are communicated with each other through the communicating groove.

Optionally, in the motor rotor, the plurality of communication grooves have the same size or different sizes.

Optionally, in the rotor of the electric machine, the individual sound-deadening chambers have the same radial section or different radial sections.

Optionally, in the motor rotor, the plurality of sound-deadening chambers have the same size or different sizes.

Optionally, in the motor rotor, the compressor is a constant speed compressor, and the sound-deadening chamber is in a skew shape.

According to another aspect of the present invention, there is provided a compressor including the motor rotor as described above.

The utility model provides an among electric motor rotor and the compressor, through set up the amortization chamber on rotor core, and incite somebody to action the amortization chamber sets up to confined column cavity, not only can avoid the pump body because of setting up the structure that the amortization chamber caused and interfere, can reduce the air current noise of compressor moreover, improves the noise and the vibration of compressor effectively.

Drawings

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so that the features and advantages of the present invention will be more apparent.

Fig. 1 is a schematic structural view of a lower end surface of a rotor core according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an upper end surface of a rotor core according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B' of FIG. 1;

FIG. 5 is a cross-sectional view taken along line C-C' of FIG. 3;

FIG. 6 is a cross-sectional view taken along line D-D' of FIG. 3;

fig. 7 is a schematic structural view of a rotor core according to another embodiment of the present invention;

fig. 8 is a schematic structural view of a rotor core according to another embodiment of the present invention;

fig. 9 is a cross-sectional view of a rotor core according to yet another embodiment of the present invention;

fig. 10 is a schematic cross-sectional view of a rotor core according to another embodiment of the present invention without a silencing chamber and a silencing chamber passage;

fig. 11 is a schematic cross-sectional view of a rotor core having a sound-deadening chamber according to another embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of a rotor core having a silencing chamber and a silencing chamber passage according to another embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along line A-A' of FIG. 12;

fig. 14 is a cross-sectional view taken along line D-D' of fig. 12.

Detailed Description

Detailed descriptions will be given below of embodiments of the present invention. Although the invention will be described and illustrated in connection with certain specific embodiments, it should be understood that the invention is not limited to these embodiments. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components have not been described in detail so as not to obscure the present invention.

Please refer to fig. 1 to fig. 6, which are schematic structural diagrams of a rotor core according to an embodiment of the present invention. As shown in fig. 1 to 6, the rotor of the motor includes: a rotor core 10; the rotor core 10 is provided with a plurality of vent holes 1 and at least one silencing cavity 4, the vent holes 1 are arranged around the axial direction of the rotor core 10 and penetrate through the two opposite ends of the rotor core 10, and the silencing cavity 4 is arranged beside the vent holes 1 and is a closed columnar cavity; both ends of the columnar cavity are sealed in the rotor core 10; or at least one end of the columnar cavity is an open end, and the open end is sealed by a component on the end face of the rotor core 10.

Specifically, the central axis position of rotor core 10 has seted up the shaft hole (reference numeral is not shown in the figure), rivet hole 2 and magnet groove 3 have been seted up to the border position of rotor core 10, rivet hole 2 with a plurality of air vents 1 have been seted up between the shaft hole, specifically be provided with on a terminal surface of rotor core 10 with the endocentric counter bore in shaft hole, the counter bore with form a step between the shaft hole, air vent 1 sets up in on the step. Shaft hole, air vent 1, rivet hole 2 and magnet groove 3 all center on rotor core 10's axial setting and run through in rotor core 10's relative both ends, the shaft hole is used for connecting the pivot of motor, air vent 1 is favorable to oil-gas separation and refrigerator oil ground to flow back, rivet hole 2 is used for interlude the rivet with the constitute part of fixed end plate, motor rotor such as balancing piece, magnet groove 3 is used for the holding busbar (not shown in the figure).

Still seted up amortization chamber 4 on rotor core 10, amortization chamber 4 is located magnet groove 3 with between the shaft hole and be close to air vent 1, amortization chamber 4 is confined column cavity for improve the air current noise of compressor.

In this embodiment, the muffling cavity 4 is opened inside the rotor core 10, and both ends of the muffling cavity are sealed in the rotor core 10, that is, both ends of the muffling cavity 4 do not extend to the opposite ends of the rotor core 10.

In other embodiments, one end of the sound-deadening chamber 4 is enclosed in the rotor core 10, and the other end of the sound-deadening chamber 4 is located on the end face of the rotor core 10 and is enclosed by a component on the end face of the rotor core 10. Or, two ends of the sound-deadening cavity 4 penetrate through two opposite ends of the rotor core 10, and two ends of the sound-deadening cavity 4 are both closed by the component on the end face of the rotor core 10. That is, one or both ends of the sound-deadening chamber 4 are open ends, and the open ends are closed by members on the end surfaces of the rotor core 10. The components on the end face of the rotor core 10 are rotor end plates, balance blocks or a combination of the rotor end plates and the balance blocks.

In this embodiment, at least one communication groove 5 is provided between the sound-deadening chamber 4 and the vent hole 1, and the sound-deadening chamber 4 can only communicate with the vent hole 1 through the communication groove 5. In other embodiments, the communication groove 5 may not be provided between the sound-deadening chamber 4 and the vent hole 1, that is, the two may not communicate with each other.

In this embodiment, the silencing cavity 4 is a cylindrical cavity, the axial direction of the silencing cavity 4 is consistent with the extending direction of the vent hole 1, and the radial sections (i.e. the cross sections) of the silencing cavity 4 are circular and have the same size. In another embodiment, the radial cross section of the sound-deadening chamber 4 is circular, but the area of the radial cross section may be gradually increased or decreased along the axial direction of the sound-deadening chamber 4. In other embodiments, the cross-section of the sound-deadening chamber 4 may have other shapes, and the cross-sectional shapes and sizes may be the same or different.

In this embodiment, only one muffling cavity 4 is opened on the rotor core 10, and the muffling cavity 4 is communicated with only one vent hole 1. In other embodiments, two, three or more sound-deadening chambers 4 may be formed in the rotor core 10, a single vent hole 1 communicates with at least one sound-deadening chamber 4, and a single sound-deadening chamber 4 may also communicate with at least one vent hole 1. That is, at least one vent hole 1 of the plurality of vent holes 1 communicates with the sound-deadening chamber 4, a single vent hole 1 may communicate with a plurality of sound-deadening chambers 4, and a plurality of vent holes 1 may share one sound-deadening chamber 4.

As shown in fig. 7, two sound-deadening chambers 4 are opened on the rotor core 10, and the two sound-deadening chambers 4 are respectively located on two opposite sides of one of the vent holes 1 and are respectively communicated with the vent hole 1 through a communication groove 5. As shown in fig. 8, a sound-deadening chamber 4 is opened on the rotor core 10, and the sound-deadening chamber 4 is located between the two vent holes 1 and is respectively communicated with the two vent holes 1 through a communicating groove 5.

In this embodiment, only one communication groove 5 is provided between the sound-deadening chamber 4 and the vent hole 1. In other embodiments, two, three or more communication grooves 5 may be provided between the sound-deadening chamber 4 and the vent hole 1. As shown in fig. 9, two communication grooves 5 are provided between the sound-deadening chamber 4 and the vent hole 1, and the sound-deadening chamber 4 and the vent hole 1 communicate with each other through the two communication grooves 5.

In this embodiment, the silencing cavity 4 is vertically arranged, and the communicating groove 5 is horizontally arranged.

The cross-sectional shapes, the dimensions and the axial heights of the sound-deadening chamber 4 and the communication groove 5 can be set according to actual needs. When two or more muffling chambers 4 are provided, the cross sections of the muffling chambers 4 may be the same or different, and the axial heights of the muffling chambers 4 may be the same or different. The cross sections of the communication groove 5 and the sound-deadening cavity 4 can be the same or different. When a plurality of communication grooves 5 are provided, the axial heights of the communication grooves 5 may be the same or different.

Preferably, the plurality of ventilation holes 1 are uniformly distributed along the circumferential direction of the rotor core 10, the axial height of each sound-deadening chamber 4 is equal, and the axial height of each communication groove 5 is equal.

Preferably, the rotor core 1 is formed by sequentially laminating a plurality of rotor sheets (not shown in the figure) from top to bottom.

In this embodiment, the sound-deadening chamber 4 is vertical. In other embodiments, the muffling chamber 4 may be skewed and the motor rotor used in a fixed speed compressor.

Please refer to fig. 10 to 14, which are schematic structural diagrams of rotor cores according to other embodiments of the present invention. As shown in fig. 10 to 14, in other embodiments, the rotor core may be composed of stamped skew rivets, and the sound-deadening chamber 4 of the rotor core is tilted in a skew shape with respect to the axial direction of the rotor core.

Correspondingly, the embodiment also provides a compressor, and the compressor comprises the motor rotor. Please refer to the above, which is not described herein.

When the refrigerant discharged from the compressor pump body passes through the vent hole 1 of the rotor core 10, the muffling cavity 4 on the rotor core 10 can play a role in reducing airflow noise.

In the compressor that this embodiment provided, because the amortization chamber sets up on motor rotor, but not on the pump body, consequently can avoid the pump body because of setting up the structure that the amortization chamber caused and interfere.

Therefore, the utility model discloses an electric motor rotor and compressor, through set up the amortization chamber on rotor core, and will the amortization chamber sets up to confined column cavity, not only can avoid the pump body because of setting up the structure that the amortization chamber caused and interfere, can reduce the air current noise of compressor moreover, improves the noise and the vibration of compressor effectively.

The foregoing is a more detailed description of the present application in connection with specific preferred embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. An electric machine rotor, comprising: a rotor core;

the two ends of the columnar cavity are sealed in the rotor core; or

2. An electric machine rotor according to claim 1, characterised in that the component on the end face of the rotor core is a rotor end plate and/or a counterweight.

3. An electric machine rotor as claimed in claim 1, wherein a single said muffling chamber communicates with at least one said vent.

4. The electric machine rotor as recited in claim 1, wherein a single of the vent holes communicates with a plurality of the sound-muffling chambers.

5. The electric machine rotor as recited in claim 3 or 4, characterized in that at least one communication groove is provided between the sound-deadening chamber and the vent hole, and the sound-deadening chamber and the vent hole are communicated with each other through the communication groove.

6. The electric machine rotor as recited in claim 5, wherein a plurality of the communication grooves have the same size or different sizes.

7. An electric machine rotor, as claimed in claim 1, characterised in that the single silencing chambers have the same radial section or different radial sections.

8. An electric machine rotor as claimed in claim 1, characterised in that a plurality of said muffling chambers are of the same size or of different sizes.

9. A compressor, comprising: an electric machine rotor as claimed in any one of claims 1 to 8.

10. The compressor of claim 9, wherein said compressor is a fixed speed compressor and said muffling chamber is skewed.