CN219287271U - Bearing systems for high-speed motors - Google Patents

Abstract

The utility model belongs to the field of high-speed motors, and discloses a bearing system of a high-speed motor, which comprises bearings arranged between a motor rotor and a bearing seat, a spacer sleeve and a distance sleeve, wherein the spacer sleeve and the distance sleeve are positioned on two sides of the bearings and the bearings are positioned, the spacer sleeve, the distance sleeve and the bearing seat enclose a lubricating oil chamber, and the bearings are immersed in lubricating oil; the bearing seat is internally provided with a bearing seat oil inlet passage and a bearing seat oil return passage which are respectively communicated with the lubricating oil chamber, and the motor shell is provided with an oil inlet pipe communicated with the bearing seat oil inlet passage and an oil return pipe communicated with the bearing seat oil return passage; the lubricating oil circularly flows along the oil inlet pipe, the bearing seat oil inlet passage, the lubricating oil chamber, the bearing seat oil return passage and the oil return pipe, and the circularly flowing lubricating oil can timely take away heat of the bearing and nearby parts, so that the temperature of the bearing is reduced, a bearing system keeps allowable working temperature, the highest running rotating speed, reliability and service life of the bearing are improved, and further the reliability and service life of the high-speed motor are improved.

Description

Bearing systems for high-speed motors

technical field

The utility model relates to the technical field of high-speed motors, in particular to a bearing system of a high-speed motor.

Background technique

The permanent magnet high-speed motor has many advantages such as high speed (motor speed exceeds 10,000 revolutions per minute, up to tens of thousands to hundreds of thousands of revolutions), high power density, no need for variable speed structure, low noise, fast dynamic response and many other advantages. It is used in mines, ships, etc. , Aerospace and other fields are widely used. Due to the high speed of the motor and the high heat generated, higher requirements are put forward for the lubrication and heat dissipation performance of the bearing system. The grease lubrication and heat dissipation setting methods of traditional bearings are difficult to meet the requirements of high-speed motors. Therefore, it is preferable to use oil lubrication to lubricate and dissipate heat from high-speed motor bearings. For example, in the Chinese invention patent application with the publication number CN103633781A and titled "Cooling of Motor Stator", lubricating oil is used to dissipate heat from the bearing and the motor stator. It is discharged through the discharge hole at the bottom, although it meets the lubrication requirements of the bearing, but its shortcomings are: since the bearing adopts an open lubrication method, in order to prevent the lubricating oil from approaching the motor rotor, a rotor end is installed on the motor rotor. The cover is equipped with a shield with a large radial size between the motor stator and the motor rotor. The structure is complex, and it cannot ensure the complete isolation of the lubricating oil from the motor rotor, which affects the reliability and life of the motor. Therefore it is necessary to improve it.

Contents of the invention

In view of this, the technical problem to be solved by the utility model is: to provide a bearing system of a high-speed motor, improve the lubrication and heat dissipation performance of the bearing, and improve the reliability and life of the bearing and the motor.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: the bearing system of the high-speed motor, including:

A bearing, the bearing inner ring of the bearing is installed on the motor rotor, the bearing outer ring of the bearing is installed on the bearing seat, and the bearing seat is installed on the motor housing;

A spacer sleeve and a distance sleeve, the spacer sleeve and the distance sleeve are respectively located on both sides of the bearing and position the inner ring of the bearing, the spacer sleeve, the distance sleeve, and the bearing seat are surrounded by Lubricating oil chamber, the bearing is located in the lubricating oil chamber, and the bearing seat is provided with an oil inlet passage and an oil return passage of the bearing seat respectively connected with the lubricating oil chamber;

An oil inlet pipe and an oil return pipe, the oil inlet pipe and the oil return pipe are arranged on the motor housing, the oil inlet pipe communicates with the oil inlet passage of the bearing seat, and the oil return pipe and the oil return pipe of the bearing seat The road is connected.

The following are multiple further improvements to the bearing system of the high-speed motor of the present invention:

Wherein, one end of the spacer sleeve is against the inner ring of the bearing, and the other end of the spacer is against the shaft shoulder. The outer circumference of the spacer sleeve is provided with a spacer sleeve conical surface, and the small-diameter end of the spacer sleeve conical surface is Adjacent to the inner ring of the bearing.

Wherein, the end of the spacer sleeve against the shaft shoulder is provided with a spacer collar groove, and the spacer collar groove is located outside the shaft shoulder; the inside of the lubricating oil chamber is provided with an inner sealing cover plate, the The inner sealing cover plate is engaged with the spacer ring groove.

Wherein, the outer peripheral surface of the distance sleeve is set as the cone surface of the distance sleeve, the positioning step surface, and the cylindrical surface of the distance sleeve in sequence, and the inner ring of the bearing is installed on the cylindrical surface of the distance sleeve and is against the positioning A stepped surface, the small-diameter end of the spacer taper surface is adjacent to the inner ring of the bearing.

Wherein, the end surface of the large-diameter end of the distance sleeve is provided with a distance collar groove; the outer side of the lubricating oil chamber is provided with an outer sealing cover plate, and the outer sealing cover plate is engaged with the distance collar groove.

Wherein, the oil inlet passage of the bearing housing includes a radial section of the oil inlet passage of the bearing housing and an axial section of the oil inlet passage of the bearing housing, and the oil inlet pipe is connected with the radial section of the oil inlet passage of the bearing housing.

Wherein, the outer side of the bearing seat is provided with a sealing seat, and the sealing seat is sleeved on the outer periphery of the distance sleeve, and the sealing seat is provided with an oil inlet channel inside the sealing seat, and the oil inlet channel of the bearing seat passes through the seal The seat inlet oil passage communicates with the lubricating oil chamber.

Wherein, the oil inlet passage of the seal seat includes an axial section of the oil inlet passage of the seal seat and an oblique section of the oil inlet passage of the seal seat, and the axial section of the oil inlet passage of the seal seat is connected to the shaft of the oil inlet passage of the bearing seat. The oblique section of the oil inlet passage of the sealing seat communicates with the lubricating oil chamber.

Wherein, the oil return channel of the bearing seat is located at the bottom of the bearing seat, and the inner wall of the bearing seat is provided with a bearing seat confluence groove communicating with the oil return channel of the bearing seat.

Wherein, the bearing adopts a high-speed ceramic ball bearing.

After adopting the above technical solution, the utility model has at least the following beneficial effects:

Because the bearing system of the high-speed motor of the present invention includes the bearing installed between the motor rotor and the bearing seat, the spacer sleeve and the distance sleeve which are respectively located on both sides of the bearing and position the inner ring of the bearing, the spacer sleeve, the distance sleeve, and the bearing seat The lubricating oil chamber of the bearing is surrounded, and the bearing is soaked in the lubricating oil; the bearing seat is provided with an oil inlet passage and an oil return passage of the bearing seat respectively connected with the lubricating oil chamber, and the motor housing is provided with a The oil inlet pipe connected to the oil inlet passage and the oil return pipe connected to the oil return passage of the bearing seat; when working, the lubricating oil circulates along the oil inlet pipe, the oil inlet passage of the bearing seat, the lubricating oil chamber, the oil return passage of the bearing seat, and the oil return pipe , while lubricating the bearing, the circulating lubricating oil can take away the heat of the bearing and nearby parts in time, reduce the bearing temperature, keep the bearing system at the allowable working temperature, improve the maximum operating speed, reliability and life of the bearing, and then improve The reliability and life of the high-speed motor are guaranteed.

Description of drawings

Fig. 1 is the structural representation of the bearing system of the high-speed motor of the utility model embodiment;

Fig. 2 is a schematic diagram of the structure of the sealing cover plate in Fig. 1;

Fig. 3 is a schematic diagram of the structure of the sealing seat in Fig. 1;

Fig. 4 is a schematic diagram of the structure of the sealing sleeve in Fig. 1;

Fig. 5 is a schematic diagram of the structure of the distance sleeve in Fig. 1;

Fig. 6 is a schematic diagram of the structure of the spacer sleeve in Fig. 1;

In the figure: 1. Motor rotor; 2. Bearing; 3. Bearing seat; 31. Radial section of oil inlet passage of bearing seat; 32. Axial section of oil inlet passage of bearing seat; 33. Oil return passage of bearing seat; 34. Bearing Seat confluence groove; 4, sealing sleeve; 41, sealing sleeve ring groove; 5, distance sleeve; 51, distance sleeve cylindrical surface; 52, positioning step surface; 53, distance sleeve cone table surface; 54, distance sleeve ring Groove; 6. Spacer sleeve; 61. Cone table surface of spacer sleeve; 62. Spacer ring groove; 7. Seal seat; 71. Axial section of oil inlet passage of seal seat; 72. Inclined section of oil inlet passage of seal seat; 8a. Outer sealing cover plate; 8b, inner sealing cover plate; 81, outer ring wall; 82, inner ring wall; 83, sealing cover plate confluence groove; 9, sealing ring; 10, sealing ring; 11, oil inlet pipe; 12, return tubing.

Detailed ways

It should be noted that in the description herein, unless otherwise specified or limited, the terms "connected", "connected", and "connected" should be interpreted in a broad sense, which may be a direct connection between two elements, or a Indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

The embodiments of the present utility model will be further detailed and non-limiting description in conjunction with the accompanying drawings.

As shown in Figures 1 to 6, the bearing system of the high-speed motor of the embodiment of the present invention includes: a bearing 2 installed between the motor rotor 1 and the bearing seat 3, and the bearing seat 3 is installed on the motor housing; The distance sleeve 5, the spacer sleeve 6, which are located on both sides of the bearing and position the inner ring of the bearing on the rotor 1 of the motor, the distance sleeve 5, the spacer sleeve 6, and the bearing seat 3 enclose a lubricating oil chamber, and the bearing 2 is located in the lubricating oil chamber , the bearing seat 3 is provided with a bearing seat oil inlet passage and a bearing seat oil return passage 33 respectively connected with the lubricating oil chamber; the oil inlet pipe 11 and the oil return pipe 12 are arranged in the motor housing, and the oil inlet pipe 11 is connected to the bearing seat. The oil passages are connected, and the oil return pipe 12 is connected with the oil return passage 33 of the bearing seat.

As shown in Figure 1, the optimized design is that the oil return passage 33 of the bearing seat is located at the bottom of the bearing seat, and the inner wall of the bearing seat 3 is provided with a bearing seat confluence groove 34 communicating with the oil return passage 33 of the bearing seat; the oil inlet passage of the bearing seat includes The radial section 31 of the oil inlet passage of the bearing seat is connected with the axial section 32 of the oil inlet passage of the bearing seat, and the oil inlet pipe 11 is connected with the radial section 31 of the oil inlet passage of the bearing seat.

Wherein, further, both sides of the lubricating oil chamber are also provided with sealing covers, which are respectively recorded as outer sealing covers 8a and inner sealing covers 8b for the convenience of description. The inner sealing covers 8b are fixed on the inside of the bearing housing 3, and the outer The sealing cover plate 8 a is arranged in the sealing seat 7 , and the sealing seat 7 is fixed on the outer side of the bearing seat 3 , and the contact surface between the sealing seat 7 and the bearing seat 3 is provided with a sealing ring 10 .

As shown in Figure 1 and Figure 3, the sealing seat 7 is set on the periphery of the distance sleeve 5, and the sealing seat 7 is further provided with an oil inlet passage for the sealing seat. The optimal design is that the oil inlet passage of the bearing seat passes through the sealing seat The oil inlet passage communicates with the lubricating oil chamber. Among them, the oil inlet passage of the seal seat includes an axial section 71 of the oil inlet passage of the seal seat and an oblique section 72 of the oil inlet passage of the seal seat, and the axial section 71 of the oil inlet passage of the seal seat is connected with the axial section 32 of the oil inlet passage of the bearing seat. Connected, the oblique section 72 of the oil inlet passage of the sealing seat communicates with the lubricating oil chamber.

As shown in Figure 6, and with reference to Figure 1, one end of the spacer sleeve 6 is against the bearing inner ring, the other end of the spacer sleeve 6 is against the shaft shoulder, and the outer circumference of the spacer sleeve 6 is provided with a spacer sleeve cone table 61, the spacer sleeve The small diameter end of the taper surface 61 is adjacent to the inner ring of the bearing. Further, the end of the spacer sleeve 6 abutting against the shaft shoulder is provided with a spacer collar groove 62 located outside the shaft shoulder, and the spacer collar groove 62 is used for clamping connection with the inner sealing cover plate 8b.

As shown in Figure 5, and with reference to Figure 1, wherein, the outer peripheral surface of the distance sleeve 5 is sequentially set as a distance sleeve cylindrical surface 51, a positioning step surface 52, and a distance sleeve cone surface 53, and the inner ring of the bearing is installed on the distance sleeve The cylindrical surface 51 (making the bearing 2 easy to assemble and disassemble and reduce wear) is against the positioning step surface 52, and the small-diameter end of the distance sleeve taper surface 53 is adjacent to the inner ring of the bearing. Further, the end surface of the large-diameter end of the spacer sleeve 5 is provided with a spacer collar groove 54, which is used for clamping connection with the outer sealing cover plate 8a.

The structure of the spacer sleeve 6 and the distance sleeve 5 is simple, and the design concept is ingenious. On the one hand, it plays a positioning role for the inner ring of the bearing to prevent axial movement; on the other hand, the spacer sleeve cone table surface 61, the spacer sleeve cone table surface 53 and the bearing seat 3 jointly enclose the lubricating oil chamber, and the bearing 2 is in the lubricating oil The room is soaked in lubricating oil, and when rotating at high speed, the spacer sleeve cone table surface 61 and the fixed distance sleeve cone table surface 53 become oil throwing plates with inclined plane structure. Compared with the traditional grease lubrication method, the circulating lubricating oil can take away the heat of the bearing and nearby parts in time, keep the bearing system at the allowable working temperature, improve the maximum operating speed, reliability and life of the bearing, and meet the high-speed The motor needs to rotate at high speed.

As shown in Figure 4, and with reference to Figure 1, wherein, further, the end face of the large diameter end of the spacer sleeve 5 is also abutted against the sealing sleeve 4, and the outer peripheral surface of the sealing sleeve 4 is provided with a sealing collar groove 41, the sealing collar A sealing ring 9 is arranged in the groove 41, and the outer sealing cover plate 8a abuts against the sealing ring 9, providing a reliable guarantee for the effective sealing of the lubricating oil chamber of the bearing.

As shown in Figures 2 and 3, and with reference to Figure 1, the side of the sealing cover facing the bearing 2 is provided with an outer ring wall 81 and an inner ring wall 82, and a seal is formed between the inner ring wall 82 and the outer ring wall 81. The cover confluence groove 83, the sealing cover step surface is formed between the outer ring wall 81 and the outer peripheral surface of the sealing cover plate; the contact surface between the sealing seat 7 and the outer sealing cover plate 8a is set as a sealing seat step surface, and the sealing seat step A labyrinth seal is formed between the bearing seat 3 and the sealing cover plate step surface; the contact surface between the bearing seat 3 and the inner sealing cover plate 8b is set as a bearing seat step surface, and a labyrinth seal is formed between the bearing seat step surface and the sealing cover plate step surface. Further, the end of the inner ring wall 82 of the sealing cover is set as a clamping protrusion, the clamping protrusion of the outer sealing cover 8a is engaged with the distance collar groove 54 of the distance sleeve 5, and the inner sealing cover 8b The engaging protrusion of the spacer is engaged with the spacer collar groove 62 of the spacer sleeve 6 . Among them, the motor rotor 1 is provided with a rotor ring groove, and the rotor ring groove is provided with a seal ring 9, and the inner sealing cover plate 8b is against the seal ring 9, providing a reliable guarantee for the effective sealing of the bearing lubricating oil chamber.

In the embodiment of the utility model, the lubricating oil chamber is surrounded by the spacer sleeve, the spacer sleeve, and the bearing seat. The arrangement of the sealing cover and the sealing seat creates a prerequisite for the formation of a good seal in the lubricating oil chamber, which can effectively prevent oil leakage from the lubricating oil chamber. Improve bearing sealing and negative pressure resistance; the seal sleeve and the outer sealing cover are sealed by a sealing ring, the outer sealing cover and the sealing seat are sealed by a labyrinth, and the sealing seat and the bearing seat are sealed by a sealing ring; the inner The sealing cover and the bearing seat are sealed by a labyrinth, and the inner sealing cover and the motor rotor are sealed by a sealing ring; multiple seal settings ensure the sealing and negative pressure resistance of the high-speed motor sealing system. The reliability and life of the high-speed motor are guaranteed.

Among them, the bearing 2 is preferably a high-speed ball bearing, for example, the 6004-2RSLTN9/HC5C3WT type high-speed bearing of SKF company, the speed is as high as 70000r/min, the ball is made of ceramic material, good wear resistance, suitable for oil lubrication, ball bearing and fixed distance The sleeve fits without backlash to extend ball bearing life while being easy to install and balance.

The bearing system of the high-speed motor of the utility model embodiment, when the high-speed motor is working (for example, the high-speed motor is used on the electric compressor as the drive motor for driving the compressor impeller, and the electric compressor is applied to the engine, and the lubricating oil of the engine lubrication system is used ), the lubricating oil enters the lubricating oil chamber along the oil inlet pipe 11, the oil inlet passage of the bearing seat, and the oil inlet passage of the sealing seat. Road 33, oil return pipe 12 flow out. The other part of the lubricating oil is thrown to the side wall of the sealing cover due to the effect of the rotating centrifugal force by the oil throwing plate of the inclined plane structure. The seat confluence groove 34 confluences to the oil return pipe 12 . Very little lubricating oil will flow to the junction of the spacer sleeve or the sealing sleeve and the sealing cover plate, and the amount of lubricating oil flowing to the seal ring 9 can be reduced under the action of centrifugal force and labyrinth seal, and finally sealed by the seal ring 9. The setting of multiple seals improves the sealing and negative pressure resistance of the bearing system, and creates preconditions for the lubrication and cooling of the bearings. While lubricating the bearing, the circulating lubricating oil can take away the heat of the bearing and nearby parts in time, reduce the temperature of the bearing, keep the bearing system at the allowable working temperature, increase the maximum operating speed, reliability and life of the bearing, and further improve the Reliability and longevity of high-speed motors.

The above description is an example of the preferred implementation of the present utility model, wherein the parts not mentioned in detail are all known technologies in the art, and the protection scope of the present utility model is based on the content of the claims, and any based on the utility model Equivalent transformations based on technical inspiration are all within the protection scope of the present utility model.

Claims (10)

1. A bearing system for a high speed motor, comprising:

the bearing inner ring of the bearing is arranged on the motor rotor, the bearing outer ring of the bearing is arranged on the bearing seat, and the bearing seat is arranged on the motor shell;

the spacer sleeve and the distance sleeve are respectively positioned at two sides of the bearing and are used for positioning the bearing inner ring, the lubricating oil chamber is enclosed by the spacer sleeve, the distance sleeve and the bearing seat, the bearing is positioned in the lubricating oil chamber, and a bearing seat oil inlet passage and a bearing seat oil return passage which are respectively communicated with the lubricating oil chamber are arranged in the bearing seat;

the oil inlet pipe and the oil return pipe, the oil inlet pipe the oil return pipe set up in the motor casing, the oil inlet pipe with the bearing frame advances oil passage and is linked together, the oil return pipe with the bearing frame returns oil passage and is linked together.

2. The bearing system of a high-speed motor according to claim 1, wherein one end of the spacer abuts against the bearing inner ring, the other end of the spacer abuts against the shaft shoulder, a spacer cone table surface is provided on the periphery of the spacer, and a small diameter end of the spacer cone table surface is adjacent to the bearing inner ring.

3. The bearing system of a high-speed motor according to claim 2, wherein a spacer sleeve groove is formed in one end of the spacer sleeve, which abuts against the shaft shoulder, and the spacer sleeve groove is located outside the shaft shoulder; an inner sealing cover plate is arranged on the inner side of the lubricating oil chamber and is clamped with the spacing sleeve ring groove.

4. The bearing system of the high-speed motor according to claim 1, wherein the outer peripheral surface of the distance sleeve is sequentially provided with a distance sleeve cone table surface, a positioning step surface and a distance sleeve cylindrical surface, the bearing inner ring is mounted on the distance sleeve cylindrical surface and abuts against the positioning step surface, and the small-diameter end of the distance sleeve cone table surface is adjacent to the bearing inner ring.

5. The bearing system of a high-speed motor according to claim 4, wherein an end face of the large diameter end of the distance sleeve is provided with a distance sleeve groove; an outer sealing cover plate is arranged on the outer side of the lubricating oil chamber, and is clamped with the fixed-distance sleeve ring groove.

6. The bearing system of a high-speed motor according to claim 1, wherein the bearing block oil inlet passage comprises a bearing block oil inlet passage radial section and a bearing block oil inlet passage axial section which are communicated, and the oil inlet pipe is connected with the bearing block oil inlet passage radial section.

7. The bearing system of the high-speed motor according to claim 6, wherein a sealing seat is arranged on the outer side of the bearing seat, the sealing seat is sleeved on the periphery of the distance sleeve, a sealing seat oil inlet passage is arranged in the sealing seat, and the bearing seat oil inlet passage is communicated with the lubricating oil chamber through the sealing seat oil inlet passage.

8. The high-speed motor bearing system according to claim 7, wherein the seal holder oil inlet passage comprises a seal holder oil inlet passage axial section and a seal holder oil inlet passage oblique section which are communicated, the seal holder oil inlet passage axial section is connected with the bearing holder oil inlet passage axial section, and the seal holder oil inlet passage oblique section is communicated with the lubricating oil chamber.

9. The bearing system of a high-speed motor according to claim 1, wherein the bearing seat oil return passage is located at the bottom of the bearing seat, and the inner wall of the bearing seat is provided with a bearing seat sink communicated with the bearing seat oil return passage.

10. The bearing system of a high speed motor according to claim 1, wherein the bearings are high speed ball bearings.

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