CN114157078B

CN114157078B - Oil storage mechanism of high-rotation-speed motor and high-rotation-speed motor

Info

Publication number: CN114157078B
Application number: CN202111442385.3A
Authority: CN
Inventors: 范佳伦; 程勇; 张平平
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-08-29
Anticipated expiration: 2041-11-30
Also published as: CN114157078A; WO2023098171A1

Abstract

The embodiment of the application provides an oil storage mechanism of a high-rotation-speed motor and the high-rotation-speed motor, and belongs to the field of bearing lubrication. The oil storage mechanism includes: the front half shell (1) of the speed reducer is clamped at the front end of the motor (2), a hole (10) for a rotor of the motor (2) to pass through is formed in the front half shell (1) of the speed reducer, and one end, far away from the motor (2), of the hole (10) is inwards recessed to form a first bearing chamber (11) for accommodating a first bearing (20) of the motor (2); the front bearing oil baffle plate (3) is connected with the bottom of the first bearing chamber (11), and the front bearing oil baffle plate (3) is used for forming a first oil storage groove (30) with the first bearing chamber (11). The oil storage mechanism can ensure that the bearing is in a lubrication state, and the damage of dry grinding of the bearing is avoided.

Description

Oil storage mechanism of high-rotation-speed motor and high-rotation-speed motor

Technical Field

The application relates to the technical field of bearing lubrication, in particular to an oil storage mechanism of a high-rotation-speed motor and the high-rotation-speed motor.

Background

With the rapid development of new energy automobiles, the requirements of the market on the rotating speed of an electric system are higher and higher, the rotating speed of a main-stream motor at present is up to 16000RPM, and the rotating speed of a high-rotating-speed motor is up to 20000 RPM. With the increase of the rotating speed, the lubrication and cooling of the bearing are required to be higher, and compared with the traditional grease lubrication scheme. Special oil ducts are needed to be designed for the high-rotation-speed motor bearings for lubrication and cooling. However, if the driver starts the automobile immediately after the oil pump starts to spray oil into the bearing, the motor bearing rotates at a high speed in a dry grinding way under the condition of not lubricating and cooling, so that serious loss is caused to the bearing, and the service life of the motor is reduced.

The existing bearing cooling of the oil-cooled motor is generally only designed with a bearing oil duct or an oil collecting structure above the bearing, so that the bearing can be lubricated and cooled under the condition of sufficient oil. However, at the moment of starting the motor, the cooling oil does not reach the bearing chamber, so that dry friction of the bearing is caused, and particularly at high rotating speed, the bearing is easily subjected to dry friction, so that the bearing raceway is lost, and the electric driving life is reduced.

Disclosure of Invention

The embodiment of the application aims to provide an oil storage mechanism of a high-rotation-speed motor and the high-rotation-speed motor, oil can be accumulated in a bearing chamber through sealing fit of a baffle plate and the bearing chamber, and when the motor is restarted, the bearing can be ensured to be in a lubrication condition, and dry grinding damage of the bearing is avoided.

In order to achieve the above object, in one aspect, an embodiment of the present application provides an oil storage mechanism of a high-rotation-speed motor, the oil storage mechanism including:

the front half shell of the speed reducer is clamped at the front end of the motor, a hole for a rotor of the motor to pass through is formed in the front half shell of the speed reducer, and one end of the hole, far away from the motor, is inwards recessed to form a first bearing chamber for accommodating a first bearing of the motor;

the front bearing oil baffle is connected with the bottom of the first bearing chamber and is used for forming a first oil storage groove with the first bearing chamber.

Optionally, the motor further comprises a second bearing;

one end of the hole, which is close to the motor, is recessed inwards to form a second bearing chamber for accommodating the second bearing;

the front bearing oil baffle has a height that is higher than at least a portion of the second bearing.

Optionally, the motor further comprises a third bearing arranged at the rear end;

the oil storage mechanism further includes:

the rear end cover is internally provided with a round hole for accommodating the rotor of the motor and the third bearing to rotate;

the rear bearing oil baffle is arranged at the bottom of the round hole and forms a second oil storage tank with the bottom of the round hole.

Optionally, the rear bearing oil baffle is annular and is connected with the coaxial center of the round hole, and the rear bearing oil baffle is connected with the rear end cover through a bolt.

Optionally, the oil storage mechanism further comprises a motor shell, the motor shell is arranged on the periphery of the main body of the motor, and a first oil filling hole is formed in the top of the motor shell.

Optionally, the front half-shell of the speed reducer is connected with the motor housing, and the front half-shell of the speed reducer includes:

the second oil filling hole is arranged at the joint of the front half shell of the speed reducer and the motor shell and is connected with the first oil filling hole through an oil way arranged in the motor shell;

the front bearing chamber oil collecting port is arranged near the top of the second bearing chamber and is connected with the second oil filling hole through an oil way arranged in the front half shell of the speed reducer.

Optionally, the rear end cap includes:

the third oil filling hole is arranged at the joint of the rear end cover and the motor shell and is connected with the first oil filling hole through an oil way arranged in the motor shell;

the rear bearing oil spraying hole is arranged near the top of the round hole and is connected with the third oil spraying hole through an oil way arranged in the rear end cover.

Optionally, the front bearing oil baffle is semicircular, the semicircular arc-shaped portion is connected with the bottom of the first bearing chamber, and the height of the semicircular straight line portion is higher than the axial width of the first bearing.

Optionally, the front bearing oil baffle is connected with the first bearing chamber through bolts.

On the other hand, the application also provides a high-rotation-speed motor, which comprises the oil storage mechanism and the motor.

Through the technical scheme, the oil storage mechanism of the high-rotation-speed motor and the high-rotation-speed motor are characterized in that the front half shell of the speed reducer is clamped at the front end of the motor, and the front half shell of the speed reducer is provided with the first bearing chamber for accommodating the first bearing of the motor. The arc-shaped part of the front bearing oil baffle is connected with the bottom of the first bearing chamber to form a first oil storage tank, so that cooling oil can be accumulated in the first oil storage tank, and the bearing can be ensured to be under the condition of lubrication when the motor is restarted, thereby avoiding damage of dry grinding of the bearing.

Additional features and advantages of embodiments of the application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the embodiments of the application. In the drawings:

FIG. 1 is a cross-sectional view of an oil reservoir mechanism of a high speed motor according to one embodiment of the present application;

FIG. 2 is a front bearing oil baffle of an oil reservoir mechanism of a high speed motor according to one embodiment of the present application;

FIG. 3 is a schematic illustration of a front bearing oil deflector and a rear bearing oil deflector of an oil reservoir mechanism of a high speed motor according to one embodiment of the present application;

FIG. 4 is a schematic view of a rear end cap of an oil reservoir mechanism of a high speed motor according to one embodiment of the present application;

fig. 5 is a schematic diagram of a front half-shell of a speed reducer of an oil storage mechanism of a high-speed motor according to an embodiment of the present application.

Description of the reference numerals

Detailed Description

The following describes the detailed implementation of the embodiments of the present application with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.

Fig. 1 is a cross-sectional view of an oil reservoir of a high-speed motor according to an embodiment of the present application. Fig. 2 is a front bearing oil baffle of an oil reservoir of a high speed motor according to one embodiment of the present application. Fig. 3 is a schematic view of a front bearing oil baffle and a rear bearing oil baffle of an oil reservoir mechanism of a high speed motor according to an embodiment of the present application. The oil storage mechanism may include: a front half shell 1 of the speed reducer, a motor 2 and a front bearing oil baffle plate 3. The front half-shell of the speed reducer may include: a bore 10 and a first bearing chamber 11. The motor 2 may comprise a first bearing 20. The front half-shell 1 of the speed reducer can be clamped at the front end of the motor 2, and a hole 10 for the rotor of the motor 2 to pass through can be formed in the front half-shell 1 of the speed reducer. The end of the bore 10 remote from the motor 2 may be recessed inwardly to form a first bearing chamber 11 which may receive a first bearing 20 of the motor 2. A front bearing oil deflector 3 may be provided at the bottom of the first bearing chamber 11. The front bearing oil deflector 3 may form a first oil reservoir 30 with the bottom of the first bearing chamber 11. The first bearing 20 can be arranged on the side surface of the first oil storage tank 30, after the first oil storage tank 30 accumulates cooling oil, even if the motor drive stops working, the first oil storage tank 30 can accumulate a certain oil amount, so that the first bearing 20 is always immersed in the cooling oil, and when the motor drive starts working again, the damage of the first bearing 20 caused by dry grinding can be avoided.

In one embodiment of the application, as shown in fig. 1, the motor 2 may further comprise a second bearing 21. At the end of the bore 10 adjacent to the motor 2 may be recessed inwardly to form a second bearing chamber 12 for receiving a second bearing 21. The second bearing chamber 21 is provided in the second bearing chamber 12, and the second bearing chamber 12 communicates with the first bearing chamber 11. The height of the front bearing oil baffle 3 can be higher than at least one part of the second bearing 21, after the first oil storage tank 30 formed by the front bearing oil baffle 3 and the first bearing chamber 11 accumulates oil, the second bearing chamber 12 is communicated with the first bearing chamber 11, and because the height of the front bearing oil baffle 3 is higher than at least one part of the second bearing 21, the second bearing 21 can be lubricated by the accumulated cooling oil in the first oil storage tank 30, so that the second bearing 21 is prevented from being damaged by dry grinding when the motor drive works again.

In one embodiment of the application, as shown in fig. 1, the motor 2 may further comprise a third bearing 22 placed at the rear end. The oil reservoir may also include a rear end cap 4 and a rear bearing oil baffle 5. The rear end cap 4 may be provided with a circular hole 40 for accommodating rotation of the rotor of the motor 2 and the third bearing 22. When the rear end cover 4 is connected with the motor 2, the round hole 40 of the rear end cover 4 is sleeved on the rotor of the motor 2. The rear bearing oil baffle 5 may be disposed at the bottom of the circular hole 40 so that a second oil reservoir 50 may be formed with the bottom of the circular hole 40. The third bearing 22 may be disposed at a side of the second oil reservoir 50 and communicate with the second oil reservoir 50. When the motor drive starts to operate, the second oil reservoir 50 can store a certain amount of cooling oil, and then the third bearing 22 can be immersed in the cooling oil accumulated in the second oil reservoir 50, so that the third bearing 22 can be always in lubrication. When the motor drive is operated again, since the third bearing 22 is always in a lubricated state, the third bearing 22 is not dry-ground due to the fact that the oil does not reach the third bearing 22 at the initial start-up.

In one embodiment of the present application, as shown in fig. 3, the rear bearing oil baffle 5 may be circular and coaxially connected with the circular hole 40. The inner circle of the rear bearing oil deflector 5 is slightly larger than the size of the third bearing 22, so that the oil level of the cooling oil is higher than the bottom of the third bearing 22 when the cooling oil is accumulated in the second oil reservoir 50 formed by the rear bearing oil deflector 5 and the circular hole 40. In summary, the rear bearing oil baffle 5 does not affect the rotation of the motor 2, and can make the third bearing 22 always infiltrate into the cooling oil accumulated in the second oil storage tank 50 formed by the rear bearing oil baffle 5 and the round hole 40, so as to avoid dry grinding of the third bearing 22 due to lack of lubrication.

In one embodiment of the application, the oil reservoir may also comprise a motor housing 6, as shown in fig. 1. The motor housing 6 may be disposed at the periphery of the main body of the motor 2, and a first oil injection hole 60 may be provided at the top of the motor housing 6. At the start of operation of the motor 2, the cooling oil may be injected into the motor 2 through the first oil injection hole 60.

In one embodiment of the application, the front half-shell 1 of the reducer can be connected to a motor housing 6, as shown in fig. 1 and 5. The front half casing 1 of the speed reducer may include a second oil filler hole 13 and a front bearing chamber oil collecting port 14. The second oil injection hole 13 may be provided at a junction of the front half-shell 1 of the reduction gear and the motor housing 6, and connected to the first oil injection hole 60 through an oil passage in the motor housing 6. The front bearing chamber oil collecting port 14 may be disposed near the top of the second bearing chamber 12, and below the front bearing chamber oil collecting port 14 is a second bearing 21. When the cooling oil needs to be injected into the motor 2, the cooling oil can enter from the first oil injection hole 60, then flow to the second oil injection hole 13 through an oil path in the motor housing 6, flow to the front bearing chamber oil collecting port 14 from the second oil injection hole 13 through an oil path in the front half shell 1 of the speed reducer, finally flow to the second bearing 21, and lubricate the second bearing 21. After flowing through the second bearing 21, since the second bearing chamber 12 communicates with the first bearing chamber 11, the cooling oil also flows to the first bearing chamber 11 to lubricate the first bearing 20 and a part of the cooling oil is accumulated in the first oil reservoir 30. When the cooling oil flows from the second oil injection hole 13 to the front bearing chamber oil collecting port 14, the cooling oil falls from the second oil injection hole 13 to the top of the second bearing chamber 12 along with gravity, the top of the second bearing chamber 12 has a certain inclination, the top of the second bearing chamber 12 may have an inclined surface, the front bearing chamber oil collecting port 14 is below the inclined surface of the top of the second bearing chamber 12, and the cooling oil flows downward along the inclined surface, flows from the front bearing chamber oil collecting port 14 to the second bearing 21 and lubricates it.

In one embodiment of the present application, as shown in fig. 1 and 4, the rear cover 4 may include a third oil injection hole 41 and a rear bearing oil drain hole 42. The third oil injection hole 41 may be provided at a junction of the rear cover 4 and the motor housing 6, and then connected to the first oil injection hole 60 through an oil passage provided in the motor housing 6. The rear bearing oil drain hole 42 may be provided near the top of the circular hole 40, and the rear bearing oil drain hole 42 may be connected to the third oil drain hole 41 through an oil passage provided inside the rear end cap 4. The third bearing 22 may be disposed below the rear bearing oil drain hole 42, after the cooling oil is injected into the first oil injection hole 60, the cooling oil flows to the third oil injection hole 41 along the oil path in the motor housing 6, and then flows to the rear bearing oil drain hole 42 along the oil path in the rear end cover 4, so that the cooling oil may flow to the third bearing 22 to lubricate the same, and a certain amount of cooling oil is accumulated in the second oil storage groove 50, so that the third bearing 22 is always in a lubricated state.

In one embodiment of the present application, as shown in fig. 3, the front bearing oil deflector 3 may be semicircular, and a semicircular arc portion is connected to the bottom of the first bearing chamber 11, and a height of the semicircular straight portion is higher than an axial width of the first bearing 20. After the front bearing oil baffle 3 and the first bearing chamber 11 form the oil reservoir 30, since the height of the straight portion of the front bearing oil baffle 3 is higher than the axial width of the first bearing 20, the height of the liquid surface of the cooling oil accumulated in the oil reservoir 30 is also higher than the axial width of the first bearing 20, and the first bearing 20 can be immersed in the cooling oil.

In one embodiment of the present application, as shown in fig. 1, the front bearing oil deflector 3 may be connected to the first bearing chamber 11 by bolts 7 so that the front bearing oil deflector 3 may serve as a pressing plate of the first bearing 20 to fix the first bearing 20. The rear bearing oil baffle 5 can be connected with the rear end cover 4 through the bolts 7, and the rear bearing oil baffle 5 can serve as a pressing plate of the third bearing 22 to fix the third bearing 22, so that the whole structure of the oil storage mechanism is more compact.

In another aspect, the present application also provides a high rotational speed motor comprising an oil storage mechanism as described in any one of the above and a motor 2.

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 process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. An oil storage mechanism of a high-rotation-speed motor, characterized in that the oil storage mechanism comprises:

the front half shell (1) of the speed reducer is clamped at the front end of the motor (2), a hole (10) for a rotor of the motor (2) to pass through is formed in the front half shell (1) of the speed reducer, and one end, far away from the motor (2), of the hole (10) is inwards recessed to form a first bearing chamber (11) for accommodating a first bearing (20) of the motor (2);

the front bearing oil baffle plate (3) is connected with the bottom of the first bearing chamber (11), and the front bearing oil baffle plate (3) is used for forming a first oil storage tank (30) with the first bearing chamber (11);

the motor (2) further comprises a second bearing (21);

one end of the hole (10) close to the motor (2) is recessed inwards to form a second bearing chamber (12) for accommodating the second bearing (21);

the front bearing oil baffle (3) is higher than at least a part of the second bearing (21);

the oil storage mechanism further comprises a motor shell (6) which is arranged on the periphery of the main body of the motor (2), and a first oil injection hole (60) is formed in the top of the motor shell (6);

the front half-shell (1) of the speed reducer is connected with the motor shell (6), and the front half-shell (1) of the speed reducer comprises:

the second oil filling hole (13) is arranged at the joint of the front half shell (1) of the speed reducer and the motor shell (6) and is connected with the first oil filling hole (60) through an oil way arranged in the motor shell (6);

the front bearing chamber oil collecting port (14) is arranged near the top of the second bearing chamber (12) and is connected with the second oil filling hole (13) through an oil way arranged in the front half shell (1) of the speed reducer;

the top of the second bearing chamber (12) is provided with a certain inclination, the cooling oil falls to the top of the second bearing chamber (12) along with gravity from the second oil injection hole (13), and the front bearing chamber oil collecting port (14) is arranged below the inclined plane of the top of the second bearing chamber (12).

2. -oil storage mechanism according to claim 1, characterised in that the motor (2) also comprises a third bearing (22) arranged at the rear end;

the oil storage mechanism further includes:

a rear end cover (4), wherein a round hole (40) for accommodating the rotor of the motor (2) and the rotation of the third bearing (22) is formed in the rear end cover (4);

the rear bearing oil baffle (5) is arranged at the bottom of the round hole (40), and a second oil storage groove (50) is formed between the rear bearing oil baffle and the bottom of the round hole (40).

3. -oil storage mechanism according to claim 2, characterised in that the rear bearing oil deflector (5) is ring-shaped and is connected coaxially with the circular hole (40), and that the rear bearing oil deflector (5) is connected with the rear end cap (4) by means of a bolt (7).

4. -oil storage mechanism according to claim 3, characterised in that the rear end cap (4) comprises:

the third oil filling hole (41) is arranged at the joint of the rear end cover (4) and the motor shell (6) and is connected with the first oil filling hole (60) through an oil way arranged in the motor shell (6);

the rear bearing oil spraying hole (42) is arranged near the top of the round hole (40) and is connected with the third oil spraying hole (41) through an oil way arranged in the rear end cover (4).

5. -oil storage mechanism according to claim 1, characterised in that the front bearing oil deflector (3) is semi-circular, the semi-circular arc-shaped part is connected with the bottom of the first bearing chamber (11), and the height of the semi-circular straight part is higher than the axial width of the first bearing (20).

6. -oil storage mechanism according to claim 1, characterised in that the front bearing oil deflector (3) is connected with the first bearing chamber (11) by means of bolts (7).

7. A high rotational speed electric motor, characterized by comprising an oil reservoir according to any one of claims 1 to 6 and an electric motor (2).