CN113726080B

CN113726080B - Bearing vibration damper and motor

Info

Publication number: CN113726080B
Application number: CN202110964732.2A
Authority: CN
Inventors: 张芳; 龚高; 李广海; 张宗杰; 张勐
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2023-05-16
Anticipated expiration: 2041-08-20
Also published as: CN113726080A

Abstract

The invention discloses a bearing vibration damper and a motor, which are used for solving the problems that the stability of a rotor is influenced by large vibration easily generated when the rotor of the motor runs at a high rotating speed for a long time, and lubrication failure is easily caused by too high temperature of a bearing. The bearing vibration damper of the present invention includes: the bearing mounting body is provided with a bearing chamber; the outer ring of the bearing is embedded into the bearing chamber; the elastic tube is arranged between the outer ring of the bearing and the bearing chamber in a surrounding mode, a fluid inlet and a fluid outlet are arranged on the elastic tube, the fluid inlet is used for introducing fluid into the elastic tube, and the fluid outlet is used for discharging the fluid in the elastic tube. The elastic tube provided by the invention can absorb heat and vibration of the bearing and keep the rotor running stably.

Description

Bearing vibration damper and motor

Technical Field

The invention relates to the technical field of motors, in particular to a bearing vibration damper and a motor.

Background

In a motor using a bearing support, the stability of high-speed operation of a rotor is greatly affected by the vibration state of the bearing, and the high-speed operation of the bearing for a long time is also prone to the problem of excessive temperature. In motor ball bearing support systems, bearing vibrations are transmitted directly to the motor through the bearing housing, resulting in increased mechanical noise and affecting rotor stability and service life.

Disclosure of Invention

In view of the above, the invention discloses a bearing vibration damper and a motor, which are used for solving the problems that the stability of a rotor is influenced by large vibration easily generated when the rotor of the motor runs at a high rotating speed for a long time, and lubrication failure is easily caused by too high temperature of a bearing.

The invention adopts the technical proposal to realize the aim that:

the first aspect of the present invention discloses a bearing vibration damping device, comprising:

the bearing mounting body is provided with a bearing chamber;

the outer ring of the bearing is embedded into the bearing chamber;

the elastic tube is provided with a cooling medium, is arranged between the outer ring of the bearing and the bearing chamber in a surrounding mode, and is provided with a fluid inlet and a fluid outlet, wherein the fluid inlet is used for introducing fluid into the elastic tube, and the fluid outlet is used for discharging the fluid in the elastic tube.

Further, the elastic tube is a continuous annular tube.

Further, the elastic tube has at least two annular fluid passages, and two adjacent annular fluid passages are communicated with each other, and the annular fluid passages are arranged along the axial direction of the bearing.

Further, the fluid inlet and the fluid outlet are correspondingly positioned on the two annular fluid passages closest to the two end surfaces of the bearing, and the fluid inlet and the fluid outlet are respectively communicated with the outside of the bearing chamber.

Further, two adjacent annular fluid channels are communicated through a plurality of holes which are uniformly distributed along the circumferential direction of the annular fluid channels.

Further, the bearing mounting body is provided with a fluid inlet channel and a fluid outlet channel which are communicated with the bearing chamber, the fluid inlet channel is opposite to the fluid inlet, and the fluid outlet channel is opposite to the fluid outlet.

Further, the fluid inlet and the fluid outlet are connected to a pipeline pressure control system for providing a fluid medium of a desired pressure into the elastic tube.

Further, the pipeline pressure control system is provided with a heat exchanger for adjusting the inflow or outflow temperature of the elastic pipe fluid.

Further, the pipeline pressure control system, the heat exchanger and the elastic pipe form a circulating cooling heat exchange system.

A second aspect of the invention discloses an electric machine comprising a rotor and a bearing vibration damper according to the first aspect, said rotor being rotatably mounted on said bearing of the bearing vibration damper.

The beneficial effects are that: according to the invention, fluid with certain pressure is introduced into the fluid inlet of the elastic tube and flows out from the fluid outlet, vibration generated by the shaft is transmitted to the bearing, the bearing transmits the vibration to the elastic tube, the fluid in the elastic tube absorbs the vibration, so that the temperature of the fluid is increased, meanwhile, heat generated during the operation of the bearing is also absorbed, the heat converted by the vibration and the heat generated during the operation of the bearing are discharged from the fluid outlet by taking the fluid of the elastic tube as a carrier, the vibration and the temperature increase of the bearing are effectively reduced, and the stable operation of the rotor can be maintained.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely examples of the present disclosure and other drawings may be made from these drawings by one of ordinary skill in the art without inventive effort.

Fig. 1 shows a schematic diagram of embodiments 1 and 2 of the present invention;

fig. 2 shows a partially enlarged view of fig. 1.

Fig. 3 is a view showing the positional relationship of the connection of the bearing mounting body and the bearing end cap in embodiment 1;

FIG. 4 shows a cross-sectional view of the outermost annular fluid channel of example 1;

FIG. 5 shows a schematic diagram of a line pressure control system in an embodiment.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

To further illustrate the technical solution of the present invention, the following specific embodiments are provided with reference to fig. 1 to 5.

Example 1

In this embodiment, there is provided a bearing vibration damping device, as shown in fig. 1, including: a bearing mounting body 10, the bearing mounting body 10 being provided with a bearing chamber 11; a bearing 20, wherein an outer ring of the bearing 20 is embedded into the bearing chamber 11; the elastic tube 30 is circumferentially arranged between the outer ring of the bearing 20 and the bearing chamber 11, a fluid inlet 31 and a fluid outlet 32 are arranged on the elastic tube 30, the fluid inlet 31 is used for introducing fluid into the elastic tube 30, and the fluid outlet 32 is used for discharging the fluid in the elastic tube 30.

Alternatively, the elastic tube 30 may be made of thermoplastic polyurethane elastomer rubber (TPU for short), which is resistant to oil, high temperature and aging.

As an implementation manner of this embodiment, as shown in fig. 1 and 3, a bearing mounting hole is formed on one side of a bearing mounting body 10, and a bearing end cover 40 is mounted, a space surrounded by the bearing end cover 40 and the bearing mounting hole forms a bearing chamber 11, an outer ring portion of the bearing 20 is embedded in the bearing chamber 11, an elastic tube 30 surrounding the outer ring of the bearing 20 is disposed between the bearing 20 and the bearing chamber 11, a fluid inlet 31 and a fluid outlet 32 are disposed on the elastic tube 30, a fluid with a certain pressure is injected into the fluid inlet 31, the elastic tube 30 bulges around to support the bearing 20, and by adjusting the pressure of the fluid, the acting force of the elastic tube 30 on the bearing 10 can be adjusted, so that the bearing 10 is prevented from tilting, and the fluid can adopt a fluid such as oil or water as a cooling and shock absorbing medium.

As an alternative implementation manner of this embodiment, the elastic tube 30 may be a spiral tube wound around the outer ring of the bearing 20, so that the effects of absorbing vibration and absorbing heat may be achieved, and the spiral tube may be used to sufficiently exchange heat and absorb vibration.

As an alternative implementation of this embodiment, the elastic tube 30 is a continuous annular tube, and the cross section of the annular tube may be an oblate shape, so as to increase the contact area between the elastic tube 30 and the bearing chamber 11 and the bearing 20, so that the bearing 20 may be supported more stably. When the heat of the bearing 20 and the generated vibration are relatively large, the shortened fluid flow can be used to quickly reduce the temperature of the bearing and quickly take away the heat of the vibration.

As a preferred implementation manner of this embodiment, as shown in fig. 2, the elastic tube 30 has at least two annular fluid channels 33, and two adjacent annular fluid channels 33 are mutually communicated, the annular fluid channels 33 are arranged along the axial direction of the bearing 20, and a plurality of side-by-side annular fluid channels 33 are adopted to fill fluid into the interior, so that stable support of the bearing 20 can be realized, and the problem of deflection of the bearing 20 due to single-side support can be prevented.

Alternatively, the annular fluid channel 33 in this embodiment may be formed by connecting a plurality of elastic tubes 30 side by side, or may be an integrally formed structure.

Further, the fluid inlet 31 and the fluid outlet 32 are correspondingly positioned on two annular fluid passages 33 closest to both end surfaces of the bearing 20, and the fluid inlet 31 and the fluid outlet 32 are respectively communicated with the outside of the bearing chamber 11. The arrangement of the fluid inlet 31 and the fluid outlet 32 on the outermost two annular fluid channels 33 facilitates a uniform distribution of the medium pressure within the annular fluid channels 33, while at the same time facilitating the absorption of vibrations and heat.

Specifically, as shown in fig. 4, two adjacent annular fluid passages 33 are communicated through a plurality of holes a uniformly distributed along the circumferential direction of the annular fluid passages 33, so that fluid can uniformly flow from one annular fluid passage 33 into the other annular fluid passage 33, and the flow resistance of the fluid is reduced.

The bearing mounting body 10 is provided with a fluid inlet channel c and a fluid outlet channel d which are communicated with the bearing chamber 11, the fluid inlet channel c is opposite to the fluid inlet 31, the fluid outlet channel d is opposite to the fluid outlet 32, and the cooling medium is conveniently introduced into the elastic tube 30 by accessing an external pipeline.

Further, the fluid inlet 31 and the fluid outlet 32 are connected to a line pressure control system for providing a fluid medium of a desired pressure into the elastic tube 30.

In order to take out the heat energy absorbed by vibration and the heat energy absorbed by the bearing from the elastic tube 30 and radiate the heat to form circulated cooling, the pipeline pressure control system is provided with a heat exchanger for adjusting the inflow or outflow temperature of the fluid of the elastic tube, and the heat exchanger is used for radiating the heat generated by the cooling medium.

In this embodiment, the cooling medium may be oil, water or air, and in this embodiment, oil or water is preferred, so that heat is more easily taken away, and a good cooling effect is achieved.

Optionally, as shown in fig. 5, the pipeline pressure control system at least includes a pump 61, a fluid inflow pipeline 62, a fluid outflow pipeline 63, a pressure regulating valve 64 and a tank 65, where the tank 65 is filled with a cooling medium, the fluid inflow pipeline 62 and the fluid outflow pipeline 63 are respectively communicated with the tank 65, the fluid inflow pipeline 62 or the fluid outflow pipeline 63 is provided with the pump 61 and the pressure regulating valve 64, the fluid inflow pipeline 62 is communicated with the fluid inlet 31, the fluid outflow pipeline 63 is communicated with the fluid outlet 32, and the heat exchange tube of the heat exchanger 66 is connected into the fluid outflow pipeline 63 to dissipate heat of the cooling medium. By adjusting the pressure of the pressure adjusting valve 64, the output pressure of the fluid medium can be adjusted, and thus the acting force of the elastic tube 30 on the bearing 20 can be adjusted, so as to adjust the supporting position of the bearing 10.

The pipeline pressure control system, the heat exchanger and the elastic pipe form a circulating cooling heat exchange system.

The embodiment can be applied to motors, but is not limited to the field of motors, and can also be applied to other occasions with vibration without departing from the protection scope of the invention.

Example 2

The present embodiment provides an electric motor comprising a rotor 50 and a bearing vibration damping device as described in embodiment 1, said rotor 50 being rotatably mounted on said bearing 20.

The bearing vibration reduction device of embodiment 1 is applied to a motor, and can reduce vibration of the motor rotor 50 during high-speed operation.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A bearing vibration damper comprising:

the bearing mounting body is provided with a bearing chamber;

the outer ring of the bearing is embedded into the bearing chamber;

an elastic tube filled with a cooling medium and circumferentially arranged between the outer ring of the bearing and the bearing chamber, wherein the elastic tube is provided with a fluid inlet and a fluid outlet, the fluid inlet is used for introducing fluid into the elastic tube, and the fluid outlet is used for discharging the fluid in the elastic tube;

the elastic tube is provided with at least two annular fluid channels, and the two adjacent annular fluid channels are communicated with each other, and the annular fluid channels are arranged along the axial direction of the bearing;

and two adjacent annular fluid channels are communicated through a plurality of holes uniformly distributed along the circumferential direction of the annular fluid channels.

2. A bearing vibration damper according to claim 1, wherein said elastic tube is a continuous annular tube.

3. A bearing vibration damping device as claimed in claim 1, wherein said fluid inlet and said fluid outlet are located in correspondence of two of said annular fluid passages closest to both end surfaces of the bearing, said fluid inlet and said fluid outlet communicating with the outside of said bearing chamber, respectively.

4. A bearing vibration damping device according to any one of claims 1 to 3, wherein the bearing mounting body is provided with a fluid inlet passage and a fluid outlet passage communicating with the bearing chamber, the fluid inlet passage being disposed opposite the fluid inlet, the fluid outlet passage being disposed opposite the fluid outlet.

5. A bearing vibration damping device as defined in claim 4 wherein said fluid inlet and said fluid outlet are connected to a line pressure control system for providing a fluid medium of a desired pressure into said elastomeric tube.

6. A bearing vibration damper according to claim 5 wherein said line pressure control system is provided with a heat exchanger for regulating the inflow or outflow temperature of said elastomeric tube fluid.

7. A bearing vibration damper according to claim 6 wherein said line pressure control system, said heat exchanger and said elastomeric tube form a recirculating cooling heat exchange system.

8. An electric machine comprising a rotor and a bearing vibration damper according to any one of claims 1-7, said rotor being rotatably mounted on said bearing of said bearing vibration damper.