CN216241308U

CN216241308U - Rotor subassembly and compressor

Info

Publication number: CN216241308U
Application number: CN202122829375.7U
Authority: CN
Inventors: 张肃; 叶容君; 陈晓育
Original assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-08
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a rotor assembly and a compressor, and relates to the technical field of compressors, wherein the rotor assembly comprises a rotor, a balance block, damping particles and a cover plate, the balance block is fixedly connected to at least one end of the rotor along the axial direction, and the balance block is provided with at least one accommodating cavity; damping particles are contained in the containing cavity; the cover plate is fixedly connected with the balance block to seal the containing cavity. According to the utility model, the rotor assembly comprising the balance block, the damping particles and the cover plate is arranged, the balance block is provided with the containing cavity and is sealed by the cover plate, the damping particles are filled in the containing cavity, the rotor assembly vibrates in a shaft system during operation and radiates to the rotor and transmits to the damping particles in the balance block, and the damping particles collide and rub with the wall surface of the containing cavity, so that the vibration energy of the rotor is consumed, the vibration of the rotor assembly is reduced, and the operation stability of the compressor is improved.

Description

Rotor subassembly and compressor

Technical Field

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

Background

In the related art, the vibration of the shaft system of the compressor can cause the air gap of the motor to be uneven, thereby causing the vibration of the rotor to be intensified. Therefore, vibration reduction of the rotor is particularly important to improve the operational stability of the compressor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the rotor assembly which can effectively reduce the vibration of the rotor and improve the operation stability of the compressor.

The utility model also provides a compressor with the rotor assembly.

A rotor assembly according to an embodiment of the first aspect of the utility model, comprising: a rotor; the balance block is fixedly connected to at least one end of the rotor along the axial direction and is provided with at least one containing cavity; damping particles accommodated in the accommodating cavity; and the cover plate is fixedly connected with the balance block so as to seal the containing cavity.

The rotor assembly provided by the embodiment of the utility model has at least the following beneficial effects:

through setting up the rotor subassembly including balancing piece, damping granule and apron, the balancing piece is equipped with and holds the chamber and seal through the apron, it fills the damping granule to hold the intracavity, rotor subassembly operation time shafting vibration and radiation to the rotor to transmit the damping granule in the balancing piece, between the damping granule, collision each other and friction between damping granule and the wall that holds the chamber, thereby consume the vibration energy of rotor, reduce the vibration of rotor subassembly, reduce the amplitude of oscillation of rotor subassembly, the operating stability of compressor has been improved.

According to some embodiments of the present invention, along the axial direction of the rotor, the depth of the cavity is H, and the thickness of the balance weight is H, so that: h is less than or equal to 0.8H.

According to some embodiments of the present invention, the balancing block is provided with a first mounting hole, the cover plate is provided with a second mounting hole, and the rotor assembly further includes a fastener penetrating through the first mounting hole and the second mounting hole so that the cover plate and the balancing block are fixedly connected to the rotor.

According to some embodiments of the present invention, the cavity is provided with a plurality of cavities, the plurality of cavities are arranged at intervals, and the cavities are filled with the damping particles.

According to some embodiments of the utility model, the weight is provided with two first mounting holes, and the cavity is located between the two first mounting holes.

According to some embodiments of the utility model, the opening of the cavity is formed in an end surface of an end of the weight away from the rotor.

According to some embodiments of the utility model, the volume of the cavity is V, the density of the damping particles is ρ, and the mass of the balance weight is M, which satisfy: rho V/M is more than or equal to 0.05 and less than or equal to 0.15.

According to some embodiments of the present invention, the total volume of the damping particles in the cavity is V1, and the volume of the cavity is V, which satisfies the following conditions: V1/V is more than or equal to 0.7 and less than or equal to 0.9.

According to some embodiments of the utility model, the cross-sectional area of the cavity is S, the diameter of the damping particles is d, and the following are satisfied: 15 is less than or equal to 4S/pi d ^2 is less than or equal to 30.

A compressor according to an embodiment of the second aspect of the present invention includes the rotor assembly described in the above embodiments.

The compressor provided by the embodiment of the utility model has at least the following beneficial effects:

adopt the rotor subassembly of the first aspect embodiment, the rotor subassembly is through setting up the rotor subassembly including the balancing piece, damping granule and apron, the balancing piece is equipped with holds the chamber and seals through the apron, it fills damping granule to hold the intracavity, the shafting vibration and radiation to the rotor during rotor subassembly operation to transmit the damping granule in the balancing piece, between the damping granule, collision and friction each other between damping granule and the wall that holds the chamber, thereby consume the vibration energy of rotor, reduce the vibration of rotor subassembly, reduce the amplitude of oscillation of rotor subassembly, the operating stability of compressor has been improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

fig. 1 is a partial structural view of a compressor according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a rotor assembly according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is an exploded view at one angle of FIG. 2;

FIG. 5 is an exploded view from another angle of FIG. 2;

FIG. 6 is a schematic structural diagram of a weight according to another embodiment of the present invention;

FIG. 7 is a graph of the ratio of the mass of damping particles to the weight of a compressor versus the vibration attenuation ratio of the compressor and the cost increase according to one embodiment of the present invention;

FIG. 8 is a graph of the packing fraction of dampening particles in a compressor versus the vibration attenuation ratio of the compressor in accordance with one embodiment of the present invention;

FIG. 9 is a graph of the ratio of the cross-sectional area of the pocket to the cross-sectional area of the dampening particles in a compressor versus the vibration attenuation ratio of the compressor in accordance with one embodiment of the present invention.

Reference numerals:

a housing 100;

a motor part 200; a rotor assembly 210; a rotor 211; a weight 212; a first mounting hole 2121; a chamber 213; damping particles 214; a cover plate 215; a second mounting hole 2151; a limit table 2152; a rivet member 216; a stator assembly 220;

a pump body member 300; a cylinder 310; a compression chamber 311; a main bearing 320; a secondary bearing 330; a crankshaft 340; a piston 350.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality means two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, a compressor according to an embodiment of the present invention is used in a refrigeration system or a heat pump system, such as an air conditioner, a refrigerator, an air-powered water heater, and the like. For example, in a refrigeration system cycle of an air conditioner, a compressor is used as a power component of refrigerant cycle, the compressor compresses low-temperature and low-pressure gaseous refrigerant to form high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant passes through a condenser to release heat, a throttling device to reduce pressure, an evaporator to absorb heat, and then the high-temperature and low-pressure gaseous refrigerant enters the compressor again to perform the next refrigerant cycle.

Referring to fig. 1, a compressor according to an embodiment of the present invention includes a housing 100, a motor part 200, and a pump body part 300. The motor part 200 and the pump body part 300 are located inside the housing 100. It is understood that the motor assembly 200 includes a rotor assembly 210 and a stator assembly 220, and the stator assembly 220 and the pump body assembly 300 are fixed to the inner wall of the casing 100. The pump body part 300 includes a cylinder 310, a main bearing 320, a sub bearing 330, and a crankshaft 340. The cylinder 310 is formed with a compression chamber 311, and the main bearing 320 and the sub bearing 330 are respectively coupled to both ends of the cylinder 310 in the axial direction, thereby covering both ends of the compression chamber 311 in the axial direction. The liquid reservoir provides gaseous refrigerant for the pump body component 300, the rotor component 210 is connected with the crankshaft 340, so that the crankshaft 340 is driven to rotate through the motor component 200, the crankshaft 340 stably rotates under the supporting action of the main bearing 320 and the auxiliary bearing 330, the piston 350 is sleeved outside the crankshaft 340, the piston 350 is arranged in the cylinder 310 and eccentrically rotates relative to the center of the cylinder 310, so that the compression cavity 311 generates periodic change, the pump body component 300 completes the processes of air suction, compression and exhaust, and the compressed gaseous refrigerant enters the refrigeration system to circulate through the exhaust pipe.

Referring to fig. 2 and 3, a rotor assembly 210 according to an embodiment of the present invention includes a rotor 211 and a weight 212, and the weight 212 may be fixed to the rotor 211 by a rivet 216. Two balance weights 212 are arranged, the two balance weights 212 are respectively connected with two ends of the rotor 211 along the axial direction, one of the two balance weights 212 is provided with a containing cavity 213, or the two balance weights 212 are both provided with containing cavities 213. The number of the cavities 213 provided for each weight 212 may be one, two or more. It is understood that the rotor assembly 210 according to an embodiment of the present invention may also be provided with only one weight 212, the weight 212 may be disposed at one end of the rotor 211 along the axial direction, and the weight 212 is provided with at least one cavity 213.

Referring to fig. 2 and 3, a rotor assembly 210 according to an embodiment of the present invention further includes damping particles 214 and a cover plate 215, wherein the damping particles 214 are filled in a cavity 213. The damping particles 214 may be metallic particles or non-metallic particles, or a collection of metallic and non-metallic particles. The damping particles 214 may be the same size or different sizes, and are not particularly limited herein. The cover plate 215 is fixedly connected to an end of the weight 212 facing the opening of the cavity 213, and covers the opening of the cavity 213, so that the cavity 213 is sealed, and the damping particles 214 are prevented from being separated from the cavity 213, which affects the operation safety of the compressor. It is understood that the cover plate 215 may be coupled to the weight 212 by welding, riveting, screwing, or the like. When there are a plurality of cavities 213, a manner of simultaneously covering the plurality of cavities 213 with the cover plate 215 may be adopted, or a manner of one-to-one covering the plurality of cover plates 215 and the plurality of cavities 213 may be adopted.

According to the rotor assembly 210 of the embodiment of the utility model, the balance weight 212 comprises the balance weight 212, the damping particles 214 and the cover plate 215, the balance weight 212 is provided with the containing cavity 213 and is sealed by the cover plate 215, the damping particles 214 are filled in the containing cavity 213, axial system vibration is radiated to the rotor 211 when the rotor assembly 210 operates and is transmitted to the damping particles 214 in the balance weight 212, and the damping particles 214 and the wall surfaces of the containing cavity 213 collide and rub with each other, so that vibration energy of the rotor 211 is consumed, vibration of the rotor assembly 210 is reduced, swing amplitude of the rotor assembly 210 is reduced, and stability of operation of the compressor is improved.

It is understood that, in order to obtain better damping effect in a limited space, the damping particles 214 are metal particles having a density greater than or equal to 2 x 10^3kg/m ^ 3. The vibration damping effect of the weight 212 increases as the density of the metal particles increases, and the greater the density of the metal particles, the greater the energy of collision and friction loss, thereby ensuring the vibration damping effect of the damping particles 214.

It can be understood that two balance weights 212 are arranged, the two balance weights 212 are respectively and fixedly connected to two ends of the rotor 211 in the axial direction, the two balance weights 212 are respectively provided with a containing cavity 213, and damping particles 214 are filled in the containing cavity 213, so that the vibration damping performance of the rotor assembly 210 can be further improved, and the stability of the operation of the compressor can be further improved.

Referring to fig. 3, it can be understood that the depth H of the cavity 213 in the axial direction of the rotor 211 is defined as H, the thickness of the weight 212 in the axial direction of the rotor 211 is defined as H, and the depth H of the cavity 213 is less than or equal to 0.8 times the thickness H of the weight 212. When the relation that H is less than or equal to 0.8H is satisfied, the balance weight 212 can satisfy the requirement of strength, and the reliability of the rotor assembly 210 is further ensured. On the premise that the relation that H is less than or equal to 0.8H is satisfied, the larger the depth H of the cavity 213 along the axial direction of the rotor 211 is, the more the number of the damping particles 214 can be filled, the more the damping particles 214 collide with each other and rub against the wall surface of the cavity 213, so that the more the vibration energy of the rotor 211 is consumed, the vibration of the rotor assembly 210 is further reduced, and the stability of the operation of the compressor is improved.

Referring to fig. 4 and 5, it can be understood that the weight 212 is provided with two first mounting holes 2121, the cover plate 215 is provided with two second mounting holes 2151, and the two first mounting holes 2121 and the two second mounting holes 2151 are respectively correspondingly provided. The rotor assembly 210 is provided with two fasteners such as the rivet 216, and the two rivet 216 are respectively inserted into the corresponding first mounting hole 2121 and the second mounting hole 2151, so that the cover plate 215 and the balance block 212 can be fixedly connected to the rotor 211, the installation is more convenient, and the structure is more stable. The receiving cavity 213 is located between the two first mounting holes 2121, so that the cover plate 215 has a better sealing effect on the receiving cavity 213.

It is understood that the first mounting hole 2121 and the second mounting hole 2151 may be correspondingly provided with one, three or more.

Referring to fig. 4 and 5, it can be understood that a limiting table 2152 is disposed at an end of the cover plate 215 facing the opening of the cavity 213, and the cover plate 215 can be positioned by positioning and connecting the limiting table 2152 with the cavity 213, so as to further improve the sealing performance of the cavity 213 and improve the assembly efficiency of the cover plate 215.

Referring to fig. 3 and 4, it can be understood that an end surface of one end of the weight 212 away from the rotor 211 is provided with an opening of the receiving cavity 213, thereby further improving the filling efficiency of the damping particles 214 and improving the installation convenience of the cover plate 215.

Referring to fig. 6, in a rotor assembly 210 according to another embodiment of the present invention, a weight 212 is provided with a plurality of cavities 213, the plurality of cavities 213 are spaced apart from each other, and the plurality of cavities 213 are independent from each other. The cavities 213 may be filled with damping particles 214 of different densities, so that the weight 212 may eliminate vibration of a wider frequency, and the weight 212 may eliminate vibration noise of a wider frequency range, thereby improving the noise reduction performance of the compressor.

It will be appreciated that the density of damping particles 214 is defined as ρ and the mass of counterbalance 212 is defined as M. The ratio of the mass of the damping particles 214 in the cavity 213 to the mass of the corresponding weight 212 may be expressed by ρ V/M, and is set in the range of 0.05 to 0.15. Referring to fig. 7, fig. 7 is a graph illustrating a ratio of a mass of damping particles 214 to a weight 212 in a compressor according to an embodiment of the present invention, as a function of a vibration damping ratio of the compressor and a cost increase. As can be seen from the figure, the cost increase curve is along a straight line where the mass fraction of the damping particles 214 increases gradually, and the vibration attenuation ratio curve is along a curve where the mass fraction of the damping particles 214 increases gradually, and the slope of the curve decreases gradually. Therefore, by balancing the vibration attenuation ratio and the cost increment, and setting ρ V/M in the range of 0.05 to 0.15, the compressor has a good vibration damping effect, and the space occupied by the cavity 213 of the weight 212 and the cost of the damping particles 214 are relatively friendly and have high cost performance.

Referring to fig. 8, fig. 8 is a graph illustrating a filling rate of damping particles 214 in a compressor according to an embodiment of the present invention in relation to a vibration damping ratio of the compressor. It is understood that, by defining the total volume of the damping particles 214 in the cavity 213 as V1, and setting the ratio between the total volume V1 of the damping particles 214 in the cavity 213 and the volume V of the cavity 213 in the range of 0.7 to 0.9, the filling rate of the damping particles 214 can be ensured, so that the damping particles 214 have enough space for collision and friction, and the filling rate of the damping particles 214 cannot be too small, which would affect the damping effect. It can be shown from the figure that, in the case where the above-mentioned ratio is in the range of 0.7 to 0.9 under otherwise constant conditions, the vibration damping ratio of the compressor is relatively high and the stability of the compressor is higher. When the above ratio is less than 0.7, the vibration damping ratio of the compressor is reduced as the filling ratio is reduced. When the above ratio is greater than 0.9, the vibration damping ratio of the compressor is decreased as the filling rate is increased, and the damping particles 214 do not have enough movement space due to the limited space of the cavity 213, so that it is not guaranteed that the damping particles 214 can lose the energy of the vibration by friction or collision.

Referring to fig. 9, fig. 9 is a graph illustrating a ratio of a cross-sectional area of a cavity 213 to a cross-sectional area of damping particles 214 in a compressor according to an embodiment of the present invention, as a function of a vibration damping ratio of the compressor. It will be appreciated that the cross-sectional area defining cavity 213 is S, the diameter of dampening particles 214 is d, and the cross-sectional area of dampening particles 214 can be expressed by 1/4 π d ^ 2. It is understood that when the damping particles 214 have an irregular spherical structure, the diameter d of the damping particles 214 should be understood as the longest line segment among line segments formed by connecting any two points on the outer surface of the damping particles 214. Setting the ratio of the cross-sectional area of the cavity 213 to the cross-sectional area of the damping particles 214 in the range of 15 to 30 ensures that the damping particles 214 can form a laminar flow state in the cavity 213 and the damping effect of the weight 212 is optimized in this state. It can be shown from the figure that, in the case where the above-mentioned ratio is in the range of 15 to 30, the vibration damping ratio of the compressor is relatively high and the stability of the compressor is higher, all other conditions being unchanged. When the above ratio is less than 15, the vibration damping ratio of the compressor is reduced as the cross-sectional area of the damping particles 214 is reduced. When the above ratio is greater than 30, the vibration damping ratio of the compressor decreases as the cross-sectional area of the damping particles 214 increases.

Referring to fig. 1, a compressor according to an embodiment of the present invention includes a rotor assembly 210 according to the above embodiment. The compressor may be a rotary compressor, or a scroll compressor, etc., and is not particularly limited herein. The compressor of the embodiment of the present invention adopts the rotor assembly 210 of the first aspect embodiment, the rotor assembly 210 is provided with the rotor assembly 210 including the balance weight 212, the damping particles 214 and the cover plate 215, the balance weight 212 is provided with the cavity 213 and is sealed by the cover plate 215, the cavity 213 is filled with the damping particles 214, axial system vibration is radiated to the rotor 211 when the rotor assembly 210 operates, and is transmitted to the damping particles 214 in the balance weight 212, and collision and friction are generated between the damping particles 214 and the wall surface of the cavity 213, so that vibration energy of the rotor 211 is consumed, vibration of the rotor assembly 210 is reduced, swing amplitude of the rotor assembly 210 is reduced, and operation stability of the compressor is improved.

Since the compressor adopts all the technical solutions of the rotor assembly 210 of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A rotor assembly, comprising:

a rotor;

the balance block is fixedly connected to at least one end of the rotor along the axial direction and is provided with at least one containing cavity;

damping particles accommodated in the accommodating cavity;

and the cover plate is fixedly connected with the balance block so as to seal the containing cavity.

2. The rotor assembly of claim 1, wherein: along the axial of rotor, the degree of depth that holds the chamber is H, the thickness of balancing piece is H, satisfies: h is less than or equal to 0.8H.

3. The rotor assembly of claim 1, wherein: the balancing piece is provided with a first mounting hole, the cover plate is provided with a second mounting hole, the rotor assembly further comprises a fastener, and the fastener penetrates through the first mounting hole and the second mounting hole so that the cover plate and the balancing piece are fixedly connected to the rotor.

4. The rotor assembly of claim 1, wherein: the cavity is equipped with a plurality ofly, and a plurality ofly it sets up to hold the cavity interval, it all fills in the cavity damping granule.

5. The rotor assembly of claim 4, wherein: the balance block is provided with two first mounting holes, and the accommodating cavity is located between the two first mounting holes.

6. The rotor assembly of claim 1, wherein: the opening of the containing cavity is formed in the end face of one end, far away from the rotor, of the balance block.

7. The rotor assembly of claim 1, wherein: the volume of the containing cavity is V, the density of the damping particles is rho, the mass of the balance block is M, and the requirements are met: rho V/M is more than or equal to 0.05 and less than or equal to 0.15.

8. The rotor assembly of claim 1, wherein: the total volume of the damping particles in the cavity is V1, the volume of the cavity is V, and the following requirements are met: V1/V is more than or equal to 0.7 and less than or equal to 0.9.

9. The rotor assembly of claim 1, wherein: the cross-sectional area of the containing cavity is S, the diameter of the damping particles is d, and the requirements are met: 15 is less than or equal to 4S/pi d ^2 is less than or equal to 30.

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