CN215445980U

CN215445980U - Motor and bearing lubricating and cooling device thereof

Info

Publication number: CN215445980U
Application number: CN202122130402.1U
Authority: CN
Inventors: 张见宝; 付强; 易四明; 唐杰; 刘福刚; 彭小明; 刘为露
Original assignee: Shandong Wind Amperex Technology Ltd
Current assignee: Shandong Wind Amperex Technology Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-01-07
Anticipated expiration: 2031-09-03

Abstract

The utility model provides a motor and a bearing lubricating and cooling device thereof, wherein the bearing lubricating and cooling device is arranged on the motor, and a bearing of the motor is accommodated in a lubricating cavity with lubricating oil; the bearing lubricating and cooling device comprises an oil tank, a gear pump, a first cooling oil pipe, a second cooling oil pipe and a third cooling oil pipe; the oil tank is arranged on the motor and used for containing lubricating oil; the gear pump is in transmission connection with the rotating shaft, and the rotating shaft drives the gear pump to operate; the first cooling oil pipe is communicated with the oil tank and an inlet of the gear pump; the second cooling oil pipe is communicated with the outlet of the gear pump and the lubricating cavity; the third cooling oil pipe is communicated with the lubricating cavity and the oil tank; lubricating oil of oil tank is through first cooling oil pipe pump income gear pump in, and the rethread gear pump is pumped to lubricated intracavity through second cooling oil pipe, and lubricating oil in the lubricated intracavity flows back to the oil tank through third cooling oil pipe. The motor and the bearing lubricating and cooling device thereof have simple structures, effectively lubricate the bearing, reduce the temperature of the bearing and ensure the safe operation of the motor.

Description

Motor and bearing lubricating and cooling device thereof

Technical Field

The utility model relates to the technical field of motors, in particular to a motor and a bearing lubricating and cooling device thereof.

Background

The motor is a power source which converts electric energy into torque according to the electromagnetic induction principle, is widely applied to airplanes, ships and automobiles, and is small in size, such as washing machines, fans, electric toothbrushes and the like, and cannot be applied to motors.

However, in the rotating process of the motor, along with the gradual increase of the rotating speed of the motor, the temperature of the bearing rises, on one hand, the lubricating oil in the bearing is deteriorated due to the rise of the temperature, the lubricating effect is reduced, the abrasion of the bearing is aggravated, the bearing is damaged, the machine is stopped, and the service life of the motor is influenced. On the other hand, the lubricating oil temperature is increased, so that the fluidity is increased, the quality of an oil film of the bearing is damaged, the oil film is easy to break down by shaft current, the high-frequency discharge phenomenon is generated, the bearing is failed, and the motor is stopped due to failure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bearing lubricating and cooling device which can effectively lubricate a bearing, reduce the temperature of the bearing and prolong the service life of a motor in the operation process of the motor.

It is another object of the present invention to provide an electric machine including a bearing lubrication cooling arrangement.

In order to solve the technical problems, the utility model adopts the following technical scheme:

according to one aspect of the present invention, the present invention provides a bearing lubrication cooling device, which is disposed on a motor, a bearing of the motor is mounted on a rotating shaft, the bearing is accommodated in a lubrication cavity with lubricating oil, the bearing lubrication cooling device includes an oil tank, a gear pump, a first cooling oil pipe, a second cooling oil pipe and a third cooling oil pipe; the oil tank is used for containing lubricating oil and arranged on the motor; the gear pump is in transmission connection with the rotating shaft, and the rotating shaft drives the gear pump to operate; the first cooling oil pipe is communicated with the oil tank and an inlet of the gear pump; the second cooling oil pipe is communicated with the outlet of the gear pump and the lubricating cavity; the third cooling oil pipe is communicated with the lubricating cavity and the oil tank; lubricating oil in the oil tank is pumped into the gear pump through the first cooling oil pipe and then pumped into the lubricating cavity through the gear pump and the second cooling oil pipe, and the lubricating oil in the lubricating cavity flows back to the oil tank through the third cooling oil pipe.

In some embodiments, the bearing lubrication cooling device further comprises an overflow valve, an inlet of the overflow valve is communicated with the second cooling oil pipe, and an outlet of the overflow valve is communicated with the third cooling oil pipe.

In some embodiments, the relief valve is provided with an adjusting piece for adjusting the opening degree of the relief valve and a pressure gauge for detecting a pressure value.

In some embodiments, a cooling fan is disposed on an end of the rotating shaft facing the oil tank, and the cooling fan is in transmission connection with the rotating shaft.

In some embodiments, the oil tank is disposed in a ring shape with the axis of the rotating shaft as the center, the cooling fan is located in the ring shape of the oil tank, and the oil tank is located at the periphery of an air channel formed by the cooling fan.

In some embodiments, the inlet of the oil tank is disposed above the oil tank, the outlet of the oil tank is disposed below the oil tank, and the inlet of the oil tank is disposed opposite to the outlet of the oil tank.

In some embodiments, a liquid level meter and an air filter are arranged on the oil tank, and a magnetic filter is arranged in the oil tank.

In some embodiments, the motor comprises a motor and a bearing lubrication cooling device arranged on the motor; the motor comprises a rotating shaft, a bearing and a lubricating cavity; the rotating shaft is arranged in the motor and rotates around the axis of the rotating shaft; the bearing is arranged on the rotating shaft; lubricating oil is stored in the lubricating cavity, and the bearing is contained in the lubricating cavity with the lubricating oil.

In some embodiments, the inlet of the lubrication chamber is disposed above the shaft and the outlet of the lubrication chamber is disposed below the shaft.

In some embodiments, the lubrication cavities include a first lubrication cavity disposed at one end of the motor and a second lubrication cavity disposed at the other end of the motor.

According to the technical scheme, the utility model has at least the following advantages and positive effects:

in the utility model, the bearing lubricating and cooling device is arranged on the motor, and the gear pump is in transmission connection with the rotating shaft of the motor. When the motor rotates, the motor shaft drives the gear pump to operate, the gear pump is communicated with the first cooling oil pipe to pump lubricating oil in the oil tank into the gear pump, the gear pump pumps the lubricating oil into the lubricating cavity through the second cooling oil pipe, the lubricating oil in the lubricating cavity flows through the bearing again and then flows back to the oil tank through the third cooling oil pipe from the outlet of the lubricating cavity, and the circulating cooling of the lubricating oil is completed. Simultaneously, along with the constantly changing of motor shaft rotational speed, the quantity of oil of gear pump income lubricating oil changes thereupon, and when motor shaft rotational speed rose, the lubricating oil quantity that the gear pump was gone into improved thereupon. The bearing lubricating and cooling device is simple in structure, effectively guarantees safe and stable operation of the motor when the lubricating and cooling efficiency of the bearing is improved, and prolongs the service life of the motor.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the motor and a bearing lubricating and cooling device thereof.

Fig. 2 is a schematic structural diagram of another angle of an embodiment of the motor and its bearing lubrication cooling device of the present invention.

Fig. 3 is a flow diagram of an embodiment of the motor and its bearing lubrication cooling device of the present invention.

Fig. 4 is a schematic structural diagram of a second lubrication chamber of an embodiment of the motor and the bearing lubrication cooling device thereof.

The reference numerals are explained below: 100. an oil tank; 200. a gear pump; 310. a first lubrication chamber; 320. a second lubrication chamber; 410. a first cooling oil pipe; 420. a second cooling oil pipe; 421. overflowing into an oil pipe; 422. an overflow oil return pipe; 430. a third cooling oil pipe; 440. a second branch oil pipe; 450. a third branch oil pipe; 500. a cooling fan; 610. an overflow valve; 611. an adjustment member; 620. a pressure gauge; 630. a liquid level meter; 640. a magnetic filter; 650. an air filter.

Detailed Description

Exemplary embodiments that embody features and advantages of the utility model are described in detail below in the specification. It is to be understood that the utility model is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the utility model and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, the state of the motor in use is taken as a reference, and the up-down direction of the motor is the following up-down direction.

Fig. 1 is a schematic structural diagram of an embodiment of the motor and a bearing lubricating and cooling device thereof. Fig. 2 is a schematic structural diagram of another angle of an embodiment of the motor and its bearing lubrication cooling device of the present invention.

Referring to fig. 1 and 2, the present invention provides a bearing lubrication cooling device, which is disposed on a motor and is communicated with a lubrication cavity outside a bearing of the motor. The bearing lubricating and cooling device guides the lubricating oil in the lubricating cavity out of the oil tank, cooling circulation is achieved, meanwhile, the lubricating oil after cooling is continuously provided for the lubricating cavity, so that the bearing is effectively lubricated, the temperature of the bearing is reduced, the service life of the motor is prolonged, and the fault occurrence rate of the motor is reduced.

Referring to fig. 1 to 3, the present invention also provides a motor including a bearing lubrication cooling device.

The motor comprises a rotating shaft, a bearing and a lubricating cavity.

The pivot is the drive shaft of motor, sets up in the motor inside, rotates along self axis to turn into mechanical energy with the electric energy.

The bearing is arranged on the rotating shaft to support the rotating shaft to rotate.

The lubricating cavity is arranged between the rotating shaft and the motor shell and surrounds the periphery of the bearing, and lubricating oil is stored in the lubricating cavity to lubricate the bearing and reduce the abrasion of the bearing caused in the rotating process.

The bearing lubricating and cooling device is used for providing cooled lubricating oil for the lubricating cavity, so that the lubricating oil absorbs the heat of the bearing when flowing through the bearing, and the temperature of the bearing is reduced. The bearing lubricating and cooling device is arranged outside the motor.

In the present embodiment, the bearing lubrication cooling device includes an oil tank 100, a gear pump 200, a first cooling oil pipe 410, a second cooling oil pipe 420, and a third cooling oil pipe 430.

The oil tank 100 is used to store lubricating oil. The gear pump 200 is in transmission connection with the rotating shaft. The first cooling oil pipe 410 communicates the oil tank 100 and the gear pump 200. The second cooling oil pipe 420 communicates the gear pump 200 and the lubrication cavity. The third cooling oil pipe 430 communicates the lubrication chamber and the oil tank 100.

When the motor operates, the rotating shaft is in transmission connection with the gear pump 200 to drive the gear pump 200 to operate, and the lubricating oil in the oil tank 100 is pumped into the gear pump 200 through the first cooling oil pipe 410. The lubricating oil enters the gear pump 200 and is pumped into the lubricating cavity through the second cooling oil pipe 420, and the lubricating oil in the lubricating cavity returns to the oil tank 100 through the third cooling oil pipe 430 communicated with the oil outlet of the lubricating cavity. The bearing lubricating and cooling device can realize cooling of lubricating oil and continuously provide the cooled lubricating oil for the lubricating cavity; meanwhile, the bearing can be lubricated and cooled, so that the service life of the motor is prolonged, and the fault rate of the motor is reduced.

In the present embodiment, the oil tank 100 is disposed at one end of the motor shaft in the axial direction to supply the gear pump 200 and the lubrication chamber with lubricating oil. In some embodiments, the inlet of the oil tank 100 is disposed at the top of the oil tank 100, and the outlet of the oil tank 100 is disposed at the bottom of the oil tank 100, which facilitates cooling of the oil in the oil tank 100 and outputting the cooled oil to the first cooling oil pipe 410. In this embodiment, the oil tank 100 is disposed at one end of the rotating shaft in a ring shape with the axis of the rotating shaft as a center.

In this embodiment, the gear pump 200 is disposed at one end of the rotating shaft, and the gear pump 200 is in transmission connection with the rotating shaft. The rotation of the motor shaft drives the gear pump 200 to pump lubricating oil. The inlet of the gear pump 200 communicates with the oil tank 100 through the first cooling oil pipe 410 to pump the lubricating oil out of the oil tank 100 through the first cooling oil pipe 410. The outlet of the gear pump 200 is communicated with the lubrication chamber through a second cooling oil pipe 420 to continuously pump the lubrication chamber with the lubricating oil. In some embodiments, the gear pump 200 is disposed at an end of the rotating shaft facing the oil tank 100.

In some embodiments, the rotation speed of the rotating shaft is positively correlated with the amount of lubricant pumped by the gear pump 200, and when the rotation speed of the rotating shaft is increased, the amount of lubricant pumped by the gear pump 200 is increased.

In this embodiment, the second cooling oil pipe 420 communicates with the gear pump 200 and the lubrication cavity, which are disposed around the periphery of the oil tank to extend the cooling pipeline of the lubricating oil and increase the cooling efficiency of the lubricating oil. In some embodiments, a second cooling oil pipe 420 is disposed around the periphery of the electric machine.

Fig. 4 is a schematic structural diagram of a second lubrication chamber of an embodiment of the motor and a bearing lubrication cooling device thereof.

Referring to fig. 2, 3 and 4, in the present embodiment, the inlet of the lubrication cavity is disposed above the motor shaft, and the outlet of the lubrication cavity is disposed below the motor shaft; so that the lubricating oil flows through the rotating shaft and the bearing under the action of gravity, and the bearing can be lubricated and cooled to the maximum extent. In some embodiments, the inlet and outlet of the lubrication chamber are symmetrically disposed. In some embodiments, the inlet of the lubrication chamber is disposed at the top of the lubrication chamber and the outlet of the lubrication chamber is disposed at the bottom of the lubrication chamber.

In other embodiments, the lubrication chamber is divided into a first lubrication chamber 310 and a second lubrication chamber 320, which are connected in parallel to a second cooling oil pipe 420 and a third cooling oil pipe 430. The first lubrication chamber 310 is disposed at one end of the motor shaft near the gear pump 200, and has an inlet communicated with the second cooling oil pipe 420 and an outlet communicated with the third cooling oil pipe 430. The second lubrication cavity 320 is disposed at an end of the motor shaft away from the gear pump 200, an inlet of the second lubrication cavity is connected to a second branch oil pipe 440, the second branch oil pipe 440 is communicated with the second cooling oil pipe 420, an outlet of the second lubrication cavity is connected to a third branch oil pipe 450, and the third branch oil pipe 450 is communicated with the third cooling oil pipe 430.

In the present embodiment, the cooled lubricant flows through the first lubrication chamber 310 and the second lubrication chamber 320, and the bearings are accommodated in the lubrication chambers. On one hand, the lubricating oil in the lubricating cavity can lubricate the bearing so as to reduce the abrasion of the bearing in the rotating process; on the other hand, the lubricating oil flowing through the bearing can also absorb heat generated by the bearing in the rotating process and carry the heat out of the motor so as to keep the viscosity of the lubricating oil in the lubricating cavity.

In the present embodiment, an inlet of the third cooling oil pipe 430 is connected to an outlet of the first lubrication chamber 310, and an outlet of the third cooling oil pipe 430 is connected to an inlet of the oil tank 100. In some embodiments, the conduit of the third cooling oil pipe 430 is extended and disposed at the periphery of the oil tank 100.

In the present embodiment, an inlet of the second branch oil pipe 440 is connected to an end of the second cooling oil pipe 420 near the inlet of the first lubrication chamber 310, and an outlet of the second branch oil pipe 440 is connected to an inlet of the second lubrication chamber 320. In some embodiments, the conduit of the second branch oil pipe 440 extends along the length of the motor and is disposed above the motor.

In the present embodiment, an inlet of the third branch oil pipe 450 is connected to an outlet of the second lubrication chamber 320, and an outlet of the third branch oil pipe 450 is connected to an end of the third cooling oil pipe 430 near the first lubrication chamber 310. In some embodiments, the conduit of the third branch oil pipe 450 extends along the length of the motor and is disposed at the lower portion of the motor.

Referring to fig. 1 and 2, in the present embodiment, a cooling fan 500 is further disposed at an end of the rotating shaft of the motor close to the oil tank 100, and the cooling fan 500 is in transmission connection with the rotating shaft, so that when the rotating shaft rotates at an increased speed, the rotating speed of the cooling fan 500 is increased accordingly.

In some embodiments, when the oil tank 100 is annular, the cooling fan 500 is disposed within the annular oil tank 100. When the cooling fan 500 rotates, cooling air generated therefrom flows through the inner circumference of the annular oil tank 100 to improve the cooling efficiency of the oil tank. In the present embodiment, the cooling fan 500 is disposed between the gear pump 200 and the first lubrication chamber 310 to cool the gear pump 200. In some embodiments, the oil tank 100 is located at the periphery of the cooling air duct formed by the cooling fan 500.

In this embodiment, a relief valve 610 is further disposed on the bearing lubrication cooling device, and the relief valve 610 is connected in parallel with the lubrication cavity to adjust the oil pressure of the lubrication oil when the amount of the lubrication oil is excessive during the operation of the gear pump 200.

The inlet of the overflow valve 610 is connected to one end of the second cooling oil pipe 420 close to the gear pump 200, and the pipeline communicated between the overflow valve 610 and the second cooling oil pipe 420 is an overflow oil pipe 421.

The outlet of the overflow valve 610 is connected to one end of the third cooling oil pipe 430 close to the inlet of the oil tank 100, and the pipeline communicated between the overflow valve 610 and the third cooling oil pipe 430 is the overflow return pipe 422. In some embodiments, the overflow oil inlet pipe 421 and the overflow oil return pipe 422 are disposed on the periphery of the oil tank 100.

In some embodiments, the relief valve 610 is provided with an adjusting member 611, and the adjusting member 611 can adjust the opening degree of the relief valve 610, so that a user can further adjust the oil supply pressure of the lubricating oil in the bearing lubrication cooling device according to actual requirements.

In some embodiments, the relief valve 610 is further provided with a pressure gauge 620, and the pressure gauge 620 is used for displaying the pressure value of the lubricating oil in the bearing lubrication cooling device. The user can adjust the pressure value of the lubricating oil in the bearing lubrication cooling device through the overflow valve 610 according to the data displayed by the pressure gauge 620.

In the present embodiment, a liquid level meter 630 is provided on the oil tank 100 for displaying the amount of lubricating oil stored in the oil tank 100. In some embodiments, the level gauge 630 is disposed at the bottom periphery of the fuel tank 100.

In this embodiment, an air filter 650 is further disposed on the oil tank 100 to ensure the balance of the internal pressure and the external pressure of the oil tank 100.

In the present embodiment, a magnetic filter 640 is provided in the oil tank 100 to purify the lubricant oil flowing into the oil tank 100 from the inlet of the oil tank 100. In some embodiments, the magnetic filter 650 is disposed below the inlet of the fuel tank 100.

Referring to fig. 1 to 4, in the present invention, when the motor starts to operate, the gear pump 200 starts to operate along with the rotation shaft of the motor, and the lubricant in the oil tank 100 enters the gear pump 200 from the first cooling oil pipe 410 under the influence of the suction force of the gear pump 200. The gear pump 200 pumps the lubricating oil pumped in from the oil tank 100 to the first lubrication chamber 310 through the second cooling oil pipe 420. The lubricating oil in the first lubricating chamber 310 is returned to the oil tank through the third cooling oil pipe 430.

A second branch oil pipe 440 is also connected to the second cooling oil pipe 420 to pump the lubricating oil pumped out by the gear pump 200 into the second lubricating chamber 320. The lubricating oil in the second lubricating cavity 320 flows back to the third cooling oil pipe 430 through the third branch oil pipe 450, and finally flows back to the oil tank.

When lubricating oil flowed through lubricated chamber, lubricating oil not only can accomplish the cooling effect to the bearing, can also absorb the heat in the bearing to bring the heat out of the motor, with the temperature of continuous reduction bearing, the cooling cycle of lubricating oil is accomplished to the lubricated cooling device of rethread bearing.

When the lubricant in the third cooling oil pipe 430 flows back into the oil tank 100, it passes through the air filter 650 and the magnetic filter 640, so that the balance of the internal pressure and the external pressure of the oil tank 100 is ensured, and the lubricant is purified.

When the gear pump 200 increases the pumping amount of the lubricating oil with the increase of the rotation speed of the rotating shaft, in order to prevent the pressure of the lubricating oil in the lubricating cavity from being too high, the user adjusts the opening degree of the overflow valve 610 by adjusting the adjusting member 611 of the overflow valve 610 according to the data of the pressure gauge 620, so that the excessive lubricating oil flows through the overflow valve 610 and flows back from the overflow oil return pipe 422 to the third cooling oil pipe 430, and then returns to the oil tank 200 through the third cooling oil pipe 430.

In the utility model, the bearing lubricating and cooling device is arranged on the motor, and the gear pump 200 is in transmission connection with the rotating shaft of the motor. When the motor is operated, the gear pump 200 pumps the lubricating oil in the oil tank 100 into the lubricating cavity through the first cooling oil pipe 410 and the second cooling oil pipe 420. After flowing through the lubrication chamber, the lubricant oil flows back to the oil tank 100 through the third cooling oil pipe 430 to complete the cooling cycle of the lubricant oil. The bearing lubricating and cooling device provides lubricating oil with lower temperature for the lubricating cavity outside the motor bearing, and the lubricating oil can effectively reduce the abrasion of the motor bearing and can also absorb the heat of the bearing so as to reduce the temperature of the bearing. And when the lubricating cavity is internally filled with the cooled lubricating oil, the fluidity of the lubricating oil is low, the quality of a formed oil film is high, the shaft current of the rotating shaft is not easy to break through the oil film, so that the bearing fails and the motor is damaged, the effective operation of the motor is ensured, and the service life of the motor is prolonged. While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. The utility model provides a bearing lubrication cooling device, sets up on the motor, its characterized in that, the bearing of motor is installed in the pivot, the bearing is acceptd in the lubricated chamber that has lubricating oil, bearing lubrication cooling device includes:

the oil tank is used for containing lubricating oil and arranged on the motor;

the gear pump is in transmission connection with the rotating shaft, and the rotating shaft drives the gear pump to operate;

the first cooling oil pipe is communicated with the oil tank and an inlet of the gear pump;

the second cooling oil pipe is communicated with the outlet of the gear pump and the lubricating cavity;

the third cooling oil pipe is communicated with the lubricating cavity and the oil tank;

and lubricating oil in the lubricating cavity flows back to the oil tank through the third cooling oil pipe.

2. The bearing lubrication cooling device according to claim 1, further comprising an overflow valve, an inlet of the overflow valve being in communication with the second cooling oil pipe, and an outlet of the overflow valve being in communication with the third cooling oil pipe.

3. The bearing lubricating and cooling device according to claim 2, wherein the relief valve is provided with an adjusting member for adjusting the opening degree of the relief valve and a pressure gauge for detecting a pressure value.

4. The bearing lubrication cooling device of claim 1, wherein a cooling fan is disposed on an end of the rotating shaft facing the oil tank, and the cooling fan is in transmission connection with the rotating shaft.

5. The bearing lubrication cooling device according to claim 4, wherein the oil tank is disposed in a ring shape centering on the axis of the rotating shaft, the cooling fan is disposed in the ring shape of the oil tank, and the oil tank is disposed at the periphery of an air passage formed by the cooling fan.

6. A bearing lubrication and cooling arrangement as claimed in claim 1 wherein the inlet of the oil tank is located above the oil tank and the outlet of the oil tank is located below the oil tank, the inlet of the oil tank being located opposite the outlet of the oil tank.

7. The bearing lubrication cooling device of claim 1, wherein a liquid level gauge and an air filter are disposed on the oil tank, and a magnetic filter is disposed in the oil tank.

8. An electric machine using the bearing lubrication cooling device of claim 1, comprising an electric machine and a bearing lubrication cooling device provided on the electric machine;

the motor comprises a rotating shaft, a bearing and a lubricating cavity; the rotating shaft is arranged in the motor and rotates around the axis of the rotating shaft; the bearing is arranged on the rotating shaft; lubricating oil is stored in the lubricating cavity, and the bearing is contained in the lubricating cavity with the lubricating oil.

9. The electric machine of claim 8, wherein the lubrication cavity inlet is disposed above the shaft and the lubrication cavity outlet is disposed below the shaft.

10. The electric machine of claim 8, wherein the lubrication cavities include a first lubrication cavity disposed at one end of the electric machine and a second lubrication cavity disposed at another end of the electric machine.