CN220354048U - Balance weight, motor assembly and compressor - Google Patents

Abstract

The application relates to the technical field of compressors and discloses a balance weight. The balance weight is arranged on the first end face of the rotor, the rotor is provided with a rotor inner hole, the first end face comprises an inner contour, the balance weight is symmetrically arranged along a first axis, and the first axis extends along the radial direction of the balance weight; the balance weight comprises an inner cambered surface and an outer cambered surface which are oppositely arranged, and the inner cambered surface is close to the inner hole of the rotor when the balance weight is installed on the rotor; wherein, the inner cambered surface of the balance weight is sunken towards the side of the outer cambered surface, and the orthographic projection of the inner cambered surface on the first end surface is a first arc; and in the direction from the windward end of the first arc line to the first axis, the curvature of the first arc line is gradually increased, and the curvature of any point on the first arc line is larger than or equal to the curvature of the inner contour. The balance block is beneficial to reducing the friction between the inner cambered surface of the balance block and the gas refrigerant and reducing the power consumption of the compressor. The application also discloses a motor assembly and a compressor.

Description

Balance weight, motor assembly and compressor

Technical Field

The application relates to the technical field of compressors, for example, to a balance weight, a motor assembly and a compressor.

Background

In the rotary compressor, weights are generally arranged on the upper end face and the lower end face of a motor rotor to balance the eccentric weight of a crankshaft eccentric part and a roller so as to achieve the design of static balance and dynamic balance, thereby reducing the vibration noise of the compressor. The rotating speed of the motor rotor is higher and higher, and the relative rotating speed of the balance weight and the high-temperature high-pressure refrigerant in the compressor is higher and higher, so that the generated wind resistance and air flow disturbance are increased, the power consumption of the compressor is increased, and meanwhile, the flow stability of the refrigerant in the compressor and the oil-gas separation efficiency of the compressor are also influenced.

The related art provides a motor balance weight of a compressor, and as shown in fig. 1, the motor balance weight includes a first surface and a second surface; an inner arc surface and an outer arc surface; the projection of the inner arc surface on the end surface of the rotor is an arc line segment a, the projection of the outer arc surface on the end surface of the rotor is an arc line segment b, and the distance between the arc line segment a and the arc line segment b is W along any radius direction of the arc line segment a; the arc line segment a and the arc line segment b have symmetrical structures, and W sequentially decreases along the symmetrical axis of the symmetrical structures to the circumferential direction of the windward side. The inner arc surface is concentric with the motor rotor, and the projection of the arc line segment a on the end surface of the rotor coincides with the inner contour of the inner hole of the rotor.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the inner arc surface of the balance weight is concentric with the motor rotor, and in the rotating process of the rotor, the rotating direction of the balance weight is opposite to the rotating direction of the gaseous refrigerant in the inner hole of the rotor, and the inner arc surface and the gaseous refrigerant move in opposite directions. Therefore, larger friction force can be generated between the inner arc surface of the balance block and the gas refrigerant, and the power consumption of the compressor is not reduced.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a balance block, a motor assembly and a compressor, which are beneficial to reducing friction between an intrados of the balance block and a gaseous refrigerant and reducing power consumption of the compressor.

In some embodiments, the weight is disposed on a first end face of the rotor, the rotor is provided with a rotor bore, the first end face includes an inner contour, the weight is symmetrically disposed along a first axis, the first axis extends in a radial direction of the weight; the balance weight comprises an inner cambered surface and an outer cambered surface which are oppositely arranged, and the inner cambered surface is close to the inner hole of the rotor when the balance weight is installed on the rotor; wherein, the inner cambered surface of the balance weight is sunken towards the side of the outer cambered surface, and the orthographic projection of the inner cambered surface on the first end surface is a first arc; and in the direction from the windward end of the first arc line to the first axis, the curvature of the first arc line is gradually increased, and the curvature of any point on the first arc line is larger than or equal to the curvature of the inner contour.

In some embodiments, the outer arc surface of the counterweight projects away from the inner arc surface, and an orthographic projection of the outer arc surface on the first end surface falls into the first end surface and does not coincide with an outer contour of the first end surface.

In some embodiments, the orthographic projection of the extrados on the first end face is a second arc; and in the direction from the windward end of the second arc line to the first axis, the curvature of the second arc line is gradually increased, and the curvature of any point on the second arc line is smaller than or equal to the curvature of the outer contour of the first end surface.

In some embodiments, the counterweight further comprises a windward end face connected to the windward end of the intrados and the windward end of the extrados; wherein, the windward end face is set to be a plane.

In some embodiments, the length of the windward end surface is less than the length of the first axis.

In some embodiments, the windward end of the counterweight is configured with a first mounting hole and the leeward end of the counterweight is configured with a second mounting hole.

In some embodiments, the weight further includes opposing first and second sides, the first side for contacting the first end of the rotor.

In some embodiments, the motor assembly includes: a rotor including a first end face; and the balance weight is arranged on the first end face, and under the condition that the balance weight is mounted on the first end face, the orthographic projection of the balance weight on the first end face falls into the first end face.

In some embodiments, with the weight mounted to the first end face, the windward end and the leeward end of the first arc of the weight both fall into the inner contour of the first end face.

In some embodiments, the compressor includes the motor assembly described above.

The balancing piece, the motor assembly and the compressor provided by the embodiment of the disclosure can realize the following technical effects:

the balancing piece that this disclosed embodiment provided sets up in the first terminal surface of rotor, and the balancing piece is including intrados and the extrados of relative setting, under the circumstances that the balancing piece was installed to the rotor, intrados is close to the rotor hole. The inner cambered surface of the balance weight is sunken towards the side where the outer cambered surface is located, and the orthographic projection of the inner cambered surface on the first end face is a first arc. In the direction from the windward end of the first arc line to the first axis, the curvature of the first arc line is gradually increased, and the curvature of any point on the first arc line is larger than or equal to the curvature of the inner contour, namely the inner cambered surface of the balance weight is concave relative to the inner contour of the first end surface. In this way, in the rotating process of the rotor, the inner cambered surface and the gaseous refrigerant are separated to move, positive pressure can be prevented from being generated between the inner cambered surface and the gaseous refrigerant by the separation movement, and the friction force between the inner cambered surface and the gaseous refrigerant is greatly reduced, so that the power consumption of the compressor is reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic structural view of a weight provided in the related art;

FIG. 2 is a schematic diagram of a weight provided by an embodiment of the present disclosure;

FIG. 3 is a schematic illustration of an orthographic projection of a counterweight on a first end surface provided by an embodiment of the disclosure;

fig. 4 is a schematic structural view of another weight provided in an embodiment of the present disclosure.

Reference numerals:

10. a rotor inner bore; 20. a first end face; 21. an inner profile; 22. an outer contour;

100. an intrados surface; 101. a first arc;

200. an outer cambered surface; 201. a second arc;

300. a windward end face;

400. a leeward end face;

500. a first mounting hole; 600. and a second mounting hole.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

Referring to fig. 1, a related art provides a motor balance weight of a compressor, the motor balance weight including a first surface and a second surface; an inner arc surface and an outer arc surface; the projection of the inner arc surface on the end surface of the rotor is an arc line segment a, the projection of the outer arc surface on the end surface of the rotor is an arc line segment b, and the distance between the arc line segment a and the arc line segment b is W along any radius direction of the arc line segment a; the arc line segment a and the arc line segment b have symmetrical structures, and W sequentially decreases along the symmetrical axis of the symmetrical structures to the circumferential direction of the windward side. The inner arc surface is concentric with the motor rotor, and the projection of the arc line segment a on the end surface of the rotor coincides with the inner contour of the rotor inner hole 10.

However, in the related art, the inner arc surface of the balance weight is concentric with the motor rotor, and in the rotation process of the rotor, the rotation direction of the balance weight is opposite to the rotation direction of the gaseous refrigerant in the inner hole 10 of the rotor, the inner arc surface and the gaseous refrigerant move in opposite directions, and the positive pressure between the inner arc surface and the gaseous refrigerant is large, so that a large friction force is generated between the inner arc surface of the balance weight and the gaseous refrigerant, which is not beneficial to reducing the power consumption of the compressor.

The embodiment of the disclosure provides a balance block, a motor assembly and a compressor, which are beneficial to reducing friction between an intrados of the balance block and a gaseous refrigerant and reducing power consumption of the compressor.

In a first aspect, embodiments of the present disclosure provide a weight.

The weight provided in the disclosed embodiment is provided at a first end face 20 of a rotor provided with a rotor bore 10, the first end face 20 comprising an inner contour 21. It will be appreciated that the rotor bore 10 is provided in the middle of the rotor and extends in the axial direction of the rotor so as to give the rotor a cylindrical shape. Accordingly, as shown in fig. 2, the first end surface 20 is annular, the inner edge of the annular shape is the inner contour 21 of the first end surface 20, and the outer edge of the annular shape is the outer contour 22 of the first end surface 20.

As shown in connection with fig. 2 and 3, the weights provided in the embodiments of the present disclosure are symmetrically disposed along a first axis l extending in a radial direction of the weights. The balancing weight includes an intrados 100 and an extrados 200 that are disposed opposite to each other, and when the balancing weight is mounted to the rotor, the intrados 100 is close to the rotor bore and the extrados 200 is distant from the rotor bore.

Wherein, the intrados 100 of the balance weight is concave toward the side of the extrados 200, and the orthographic projection of the intrados 100 on the first end surface 20 is the first arc line 101. In the direction from the windward end of the first arc line 101 to the first axis l, the curvature of the first arc line 101 gradually increases, and the curvature of any point on the first arc line 101 is greater than or equal to the curvature of the inner contour 21. As shown in connection with fig. 3, the curvature of the point corresponding to the windward end of the first arc 101 is equal to the curvature of the inner contour 21; accordingly, the curvature of the point corresponding to the leeward end of the first arc 101 is equal to the curvature of the inner contour 21; in addition, the curvature of the remaining points on the first arc 101 is greater than the curvature of the inner contour 21.

The weight provided in the embodiment of the present disclosure is disposed on the first end surface 20 of the rotor, and the weight includes an intrados surface 100 and an extrados surface 200 that are disposed opposite to each other, and in the case that the weight is mounted to the rotor, the intrados surface 100 is close to the inner hole of the rotor. The intrados 100 of the counterweight is concave toward the side of the extrados 200, and the orthographic projection of the intrados 100 on the first end surface 20 is the first arc 101. In the direction from the windward end of the first arc line 101 to the first axis l, the curvature of the first arc line 101 gradually increases, and the curvature of any point on the first arc line 101 is greater than or equal to the curvature of the inner contour 21, that is, the inner arc surface 100 of the balance weight is concave relative to the inner contour 21 of the first end surface 20. In this way, in the rotation process of the rotor, the intrados 100 and the gaseous refrigerant are separated, so that positive pressure between the intrados 100 and the gaseous refrigerant can be prevented by the separation, and the friction between the intrados 100 and the gaseous refrigerant is greatly reduced, thereby being beneficial to reducing the power consumption of the compressor.

Here, the concave intrados 100 of the weight relative to the inner contour 21 of the first end face 20 means: since the curvature of the first arc line 101 is greater than or equal to the curvature of the inner contour, the degree of curvature of the first arc line 101 is greater than the degree of curvature of the inner contour 21, and although both the intrados 100 and the inner contour 21 are recessed toward the side of the extrados 200, the degree of recess of the intrados 100 is greater, and thus the intrados 100 of the weight is recessed relative to the inner contour 21 of the first end surface 20.

In some embodiments, the outer camber surface 200 of the counterweight projects away from the inner camber surface 100, and the orthographic projection of the outer camber surface 200 onto the first end surface 20 falls into the first end surface 20 and does not coincide with the outer contour of the first end surface 20. By dropping the orthographic projection of the extrados 200 onto the first end face 20 into the first end face 20, the weight is located in the area defined by the first end face 20 of the rotor with the weight mounted to the rotor, and interference of the weight with parts such as the motor stator or crankshaft can be avoided. The orthographic projection of the outer arc surface 200 on the first end surface 20 does not coincide with the outer contour of the first end surface 20, which is beneficial to reducing the windage of the balance weight.

In some embodiments, as shown in connection with fig. 3, the orthographic projection of extrados 200 on first end face 20 is second arc 201. In a direction along the windward end of the second arc 201 to the first axis l, the curvature of the second arc 201 gradually increases, and the curvature of any point on the second arc 201 is smaller than or equal to the curvature of the outer contour 22 of the first end surface 20. By this arrangement, the gas pressure resistance of the extrados 200 can be reduced, thereby reducing the air flow noise and reducing the compressor oil yield.

Alternatively, as shown in connection with fig. 3, at the intersection of the second arc 201 and the first axis l, the curvature is equal to the curvature of the outer contour 22. At other points of the second arc 201, the curvature is less than or equal to the curvature of the outer contour 22 of the first end face 20.

In some embodiments, as shown in connection with fig. 2, the weight further includes a windward end surface 300, the windward end surface 300 being connected to the windward end of the intrados surface 100 and the windward end of the extrados surface 200. Wherein the windward end surface 300 is provided as a plane. Accordingly, since the weights are symmetrically disposed along the first axis l, the weights further include a leeward end face 400 disposed opposite the windward end face 300. The leeward end face 400 is arranged to be planar.

In some embodiments, as shown in connection with fig. 3, the length of the windward end surface 300 is less than the length of the first axis l. The length of the windward end 300 refers to the radial dimension of the windward end 300 along the weight. By the arrangement, the length of the windward end face can be properly reduced, the gas pressure resistance of the windward end face is reduced, the air flow noise is reduced, and the oil yield of the compressor is reduced.

In some embodiments, as shown in connection with fig. 4, the windward end of the counterweight is configured with a first mounting hole 500 and the leeward end of the counterweight is configured with a second mounting hole 600. By providing the first and second mounting holes 500 and 600, the weight is conveniently mounted to the rotor.

It will be appreciated that the first mounting hole 500 and the second mounting hole 600 are symmetrically disposed along the first axis l.

In some embodiments, the counterweight further includes opposing first and second sides, the first side for contacting the first end face 20 of the rotor. The second side faces the side of the first side remote from the first end face 20 with the counterweight mounted to the rotor. The first side, the second side, the intrados 100, the extrados 200, the windward end face 300 and the leeward end face 400 are surrounded to form a counterweight.

In a second aspect, embodiments of the present disclosure provide a motor assembly.

Embodiments of the present disclosure provide a motor assembly including a rotor and a counterweight in any of the embodiments described above. The rotor includes a first end face 20. The counterweight is disposed on the first end surface 20, and an orthographic projection of the counterweight on the first end surface 20 falls into the first end surface 20 when the counterweight is mounted to the first end surface 20.

The motor assembly provided by the embodiment of the disclosure includes the above-mentioned balancing weight, the balancing weight is disposed on the first end face 20 of the rotor, the balancing weight includes an intrados surface 100 and an extrados surface 200 which are disposed oppositely, and under the condition that the balancing weight is mounted to the rotor, the intrados surface 100 is close to the inner hole of the rotor. The intrados 100 of the counterweight is concave toward the side of the extrados 200, and the orthographic projection of the intrados 100 on the first end surface 20 is the first arc 101. In the direction from the windward end of the first arc line 101 to the first axis l, the curvature of the first arc line 101 gradually increases, and the curvature of any point on the first arc line 101 is greater than or equal to the curvature of the inner contour 21, that is, the inner arc surface 100 of the balance weight is concave relative to the inner contour 21 of the first end surface 20. In this way, in the rotation process of the rotor, the intrados 100 and the gaseous refrigerant are separated, so that positive pressure between the intrados 100 and the gaseous refrigerant can be prevented by the separation, and the friction between the intrados 100 and the gaseous refrigerant is greatly reduced, thereby being beneficial to reducing the power consumption of the compressor.

In some embodiments, as shown in connection with fig. 3, with the weight mounted to the first end face 20, both the windward and leeward ends of the first arc 101 of the weight fall into the inner contour 21 of the first end face 20. By the arrangement, the inner cambered surface 100 of the balance block is recessed relative to the inner contour 21 of the first end face 20, so that friction between the inner cambered surface 100 and the gas refrigerant is greatly reduced, and the power consumption of the compressor is reduced. In addition, the weight is located in the region defined by the first end face 20 of the rotor, and interference between the weight and parts such as the motor stator or the crankshaft can be avoided.

Optionally, the rotor further comprises a second end surface arranged opposite to the first end surface. The motor assembly comprises two balancing weights which are respectively arranged on the first end face and the second end face. By this arrangement, the power consumption of the compressor can be further reduced.

In a third aspect, embodiments of the present disclosure provide a compressor.

The compressor provided by the embodiment of the disclosure comprises the motor assembly provided by any one of the embodiments.

The motor assembly of the compressor provided by the embodiment of the disclosure comprises a rotor and a balance weight, wherein the balance weight is arranged on a first end face 20 of the rotor, the balance weight comprises an intrados surface 100 and an extrados surface 200 which are oppositely arranged, and the intrados surface 100 is close to an inner hole of the rotor under the condition that the balance weight is arranged on the rotor. The intrados 100 of the counterweight is concave toward the side of the extrados 200, and the orthographic projection of the intrados 100 on the first end surface 20 is the first arc 101. In the direction from the windward end of the first arc line 101 to the first axis l, the curvature of the first arc line 101 gradually increases, and the curvature of any point on the first arc line 101 is greater than or equal to the curvature of the inner contour 21, that is, the inner arc surface 100 of the balance weight is concave relative to the inner contour 21 of the first end surface 20. In this way, in the rotation process of the rotor, the intrados 100 and the gaseous refrigerant are separated, so that positive pressure between the intrados 100 and the gaseous refrigerant can be prevented by the separation, and the friction between the intrados 100 and the gaseous refrigerant is greatly reduced, thereby being beneficial to reducing the power consumption of the compressor.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. The balance weight is arranged on the first end face of the rotor, the rotor is provided with a rotor inner hole, and the first end face comprises an inner contour, and the balance weight is characterized in that the balance weight is symmetrically arranged along a first axis, and the first axis extends along the radial direction of the balance weight; the balance weight comprises an inner cambered surface and an outer cambered surface which are oppositely arranged, and the inner cambered surface is close to the inner hole of the rotor when the balance weight is installed on the rotor;

wherein, the inner cambered surface of the balance weight is sunken towards the side of the outer cambered surface, and the orthographic projection of the inner cambered surface on the first end surface is a first arc; and in the direction from the windward end of the first arc line to the first axis, the curvature of the first arc line is gradually increased, and the curvature of any point on the first arc line is larger than or equal to the curvature of the inner contour.

2. The weight of claim 1, wherein the outer arcuate surface of the weight projects away from the inner arcuate surface, and wherein an orthographic projection of the outer arcuate surface onto the first end surface falls into the first end surface and does not overlap an outer contour of the first end surface.

3. The weight of claim 1, wherein the orthographic projection of the extrados on the first end face is a second arc; and in the direction from the windward end of the second arc line to the first axis, the curvature of the second arc line is gradually increased, and the curvature of any point on the second arc line is smaller than or equal to the curvature of the outer contour of the first end surface.

4. A counterweight according to any one of claims 1 to 3 wherein the counterweight further comprises a windward end face connected to the windward end of the intrados and the windward end of the extrados; wherein, the windward end face is set to be a plane.

5. The weight of claim 4, wherein a length of the windward end surface is less than a length of the first axis.

6. A counterweight according to any one of claims 1 to 3 wherein the windward end of the counterweight is configured with a first mounting hole and the leeward end of the counterweight is configured with a second mounting hole.

7. A counterweight according to any one of claims 1 to 3 wherein the counterweight further comprises opposed first and second sides, the first side being for contact with the first end face of the rotor.

8. An electric motor assembly, comprising:

a rotor including a first end face; and, a step of, in the first embodiment,

a counterweight according to any of claims 1 to 7, disposed at the first end face, the orthographic projection of the counterweight on the first end face falling into the first end face when the counterweight is mounted to the first end face.

9. The motor assembly of claim 8, wherein, with the counterweight mounted to the first end face, the windward end and the leeward end of the first arc of the counterweight both fall within the inner contour of the first end face.

10. A compressor comprising a motor assembly as claimed in claim 8 or 9.