CN220732496U - Bearing sealing structure for high-speed motor - Google Patents
Bearing sealing structure for high-speed motor Download PDFInfo
- Publication number
- CN220732496U CN220732496U CN202322461389.7U CN202322461389U CN220732496U CN 220732496 U CN220732496 U CN 220732496U CN 202322461389 U CN202322461389 U CN 202322461389U CN 220732496 U CN220732496 U CN 220732496U
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- Prior art keywords
- bearing
- cover plate
- seal
- oil
- speed motor
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- 238000007789 sealing Methods 0.000 title claims abstract description 32
- 230000003068 static effect Effects 0.000 claims description 5
- 239000000565 sealant Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 106
- 230000000694 effects Effects 0.000 description 10
- 230000001050 lubricating effect Effects 0.000 description 9
- 238000005461 lubrication Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Sealing Of Bearings (AREA)
Abstract
The utility model discloses a bearing sealing structure for a high-speed motor, which comprises a main shaft, a bearing, an outer cover plate, an inner cover plate and a bearing seat, wherein the bearing is arranged on the main shaft; dynamic seals are respectively arranged between the inner cover plate and the main shaft, and the diameters of the dynamic seals are smaller than the outer diameter of the bearing.
Description
Technical Field
The utility model belongs to the technical field of high-speed motors, and particularly relates to a bearing sealing structure for a high-speed motor.
Background
The rotating speed of the high-speed motor is higher than that of a common motor, the bearing of the high-speed motor needs to work at a higher rotating speed, and the sealing and lubricating requirements of the bearing under the working condition of high rotating speed are higher than those of the bearing under the working condition of low rotating speed.
Preferably, the bearings of the high speed motor are lubricated with oil gas or oil. For oil and gas lubrication, the lubrication medium is required to be continuously injected during the operation of the bearing, so that the injected lubrication medium must be considered to possibly leak outside the bearing chamber to cause pollution or other negative effects. For high speed motors, the motor compartment is on one side of the bearing, called the inboard side, which contains electrical components such as coils, silicon steel, etc., and grease in the lubrication medium if attached to the electrical components is likely to cause an unacceptable change in electrical performance. While the other side of the high-speed motor bearing, i.e. the side to which the load is connected, is called the outer side, there are several common connecting means if the outer side of the bearing is not a direct drive load, but the load is driven by the connecting means: 1. if a gearbox is used as the connecting means, the gearbox is also lubricated, and the lubrication medium of the bearing leaks into the gearbox without any problem. However, if a gear box is used for connection, the motor does not need to be at high speed, and a low-speed motor can be used for speed regulation through the gear box and then driving the load.
2. If a coupling is used as the connecting means, the coupling also needs to be lubricated, so that leakage of the lubricating medium from the motor bearing housing into the coupling is not feared. If the coupler is used for connecting loads, the coupler often cannot work well under high-speed working conditions, and is generally used for connecting low-speed equipment.
3. If a belt or a chain is used as the connecting device, the lubricating medium can be directly discharged to the external environment or can be recycled. But under the high-speed working condition, the belt and the chain are easy to fall off, so that the equipment is invalid. Whether it is the gearbox, coupling, belt or chain, is resistant to leakage of lubricating medium.
High speed motors are generally used to drive loads directly, rather than connecting the load through an intermediate mechanism. The outside of the bearing directly drives the load, and if the lubricating medium leaks to the outside, the lubricating medium enters the load equipment, so that the abnormal operation of the load equipment can be caused. For example, an air compressor is a typical load, which requires air to be supplied downstream to meet the cleanliness requirements, but the lubrication medium once leaked into the air compressor does not supply air to meet the cleanliness requirements.
The high-speed bearings used in the high-speed motor must take into consideration the injection, recovery and sealing problems of the lubricating medium, and must be sealed on both sides, and in addition, the high-speed motor must directly drive the load, leaving a very limited structural space for the bearings to seal, and must be easy to assemble, and ensure the sealing effect and the lubricating effect.
The conventional bearing sealing structure for the high-speed motor generally has the following problems:
the dynamic seal, especially the dynamic seal between the inner cover plate and the main shaft is directly larger than the outer diameter of the bearing, so that the linear speed of the guide actuation seal is high in the working state, and the abrasion of the sealing ring is high, thereby the sealing effect cannot be durable, and the maintenance burden is increased.
In addition, since the bearing for the high-speed motor is fast in rotation speed and easy to generate heat, the cooling effect needs to be ensured, the existing bearing sealing structure for the high-speed motor is conducted by utilizing a lubricating oil path of the bearing and an oil path on a bearing seat, the cooling effect is insufficient for the bearing for the high-speed motor due to the circulation of the oil path, and the bearing balls expand along with the increase of temperature during operation, so that the bearing balls and the bearing rings are blocked, and the system cannot work normally. Therefore, it is an important issue to develop a bearing seal structure for a high-speed motor that is easy to assemble, has a sealing effect, a lubricating effect and a cooling effect.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a bearing sealing structure for a high-speed motor, which adopts the following technical scheme: the bearing sealing structure for the high-speed motor comprises a main shaft, a bearing, an outer cover plate, an inner cover plate and a bearing seat, wherein the bearing is arranged on the main shaft; dynamic seals are respectively arranged between the inner cover plate and the main shaft, and the diameters of the dynamic seals are smaller than the outer diameter of the bearing.
The utility model is further characterized in that:
the inner side surface of the outer cover plate or the outer side surface of the bearing seat is provided with an avoidance counter bore for accommodating a bolt head of the long bolt, the bearing seat is provided with a through hole for a screw rod of the long bolt to pass through, and the inner cover plate is provided with a through hole or a blind hole with internal threads, which is matched with the screw rod of the long bolt; the outer cover plate is provided with a through hole for the screw rod of the short bolt to pass through, the outer side surface of the outer cover plate is provided with a receiving counter bore for receiving the bolt head of the short bolt, and the outer side of the bearing seat is provided with a through hole or a blind hole with internal threads and matched with the screw rod of the short bolt.
The static seal is a piston seal, a piston rod seal, a triangular groove seal, an end face seal, a sealing gasket or sealant.
The dynamic seal is a dry gas seal, an oil seal, an air seal, a labyrinth seal or a tooth seal.
The bearing outer ring is provided with an oil inlet hole, an annular oil inlet groove communicated with the oil inlet hole of the bearing outer ring is arranged in the bearing mounting hole of the bearing seat or on the bearing outer ring, and the annular oil inlet groove is communicated with an oil inlet oil way on the bearing seat; the oil return device is characterized in that oil return grooves are formed in the inner cover plate and the outer cover plate, oil return oil collecting grooves are formed in the bearing seat, and are communicated with the oil return oil collecting grooves, and the oil return oil collecting grooves are communicated with an oil return path.
And the main shaft is provided with bearing inner ring limiting auxiliary parts on the inner side and the outer side of the bearing.
And a dynamic seal is arranged between the limit auxiliary part on the outer side of the bearing and the outer cover plate.
The coverage area of the oil return grooves on the inner cover plate and the outer cover plate in the circumferential direction is smaller than half circle.
The coverage area of the oil return grooves on the inner cover plate and the outer cover plate in the circumferential direction is smaller than 1/4 circle.
The beneficial effects of the utility model are as follows:
the utility model has simple structure, and can install the bearing sealing structure in a very limited space from inside to outside. Firstly, the inner side surface of the outer cover plate or the outer side surface of the bearing seat is provided with an avoidance counter bore for accommodating a long bolt head, and the outer side surface of the outer cover plate is provided with an accommodating counter bore for accommodating a short bolt head, so that the axial size of the sealing structure can be reduced, and the assembly is easier to realize under the condition of small assembly space; dynamic seals are respectively arranged between the inner cover plate and the main shaft and between the outer cover plate and the main shaft, and the diameters of the dynamic seals are smaller than the outer diameter of the bearing, so that the linear speed of the dynamic seals is small in the working state, and the abrasion of the sealing rings is slow, so that the sealing effect is good; because the circumferential positioning device is not arranged between the bearing and the bearing seat, an oil inlet oil way on the bearing seat is not easy to be communicated with an oil inlet hole of the outer ring of the bearing, an annular oil inlet groove communicated with the oil inlet hole of the outer ring of the bearing is arranged in a bearing mounting hole of the bearing seat or on the outer ring of the bearing, and the annular oil inlet groove is communicated with the oil inlet oil way on the bearing seat; in addition, owing to be provided with the oil return groove on inboard apron and the outside apron, be provided with the oil return oil sump in the bearing frame, oil return groove and oil return oil sump switch on, oil return oil sump and oil return oil circuit switch on, oil return groove and oil sump's setting makes the oil return speed accelerate, and the oil return is more smooth and easy, and the oil mass that the oil feed oil circuit unit time was supplied with like this also can be more, and whole oil circuit flow can all increase, and the flow is big, can take away more heat, and the lubrication and the cooling effect of bearing also can be better, can prolong the life of bearing, has also alleviateed maintenance's work load like this.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present utility model in one direction;
FIG. 2 is a cross-sectional view of the embodiment of FIG. 1 in another orientation;
FIG. 3 is a cross-sectional view of the embodiment of FIG. 1 in a third direction;
FIG. 4 is a perspective view of the bearing of FIG. 1;
FIG. 5 is a perspective view of the bearing housing of FIG. 1;
FIG. 6 is a perspective view of the inner cover plate of FIG. 1;
fig. 7 is a perspective view of the outside cover plate of fig. 1.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, a bearing sealing structure for a high-speed motor comprises a main shaft 1, a bearing 2, an outer cover plate 3, an inner cover plate 4 and a bearing seat 5, wherein the bearing 2 is arranged on the main shaft, the bearing seat 5 is provided with a bearing mounting hole 51, an oil inlet oil path 52 and an oil return oil path 53, the outer cover plate 3 is connected with the bearing seat 5 through a short bolt 6, the inner cover plate 4 is connected with the bearing seat 5 through a long bolt 7, a first sealing ring 33 and a second sealing ring 41 are respectively arranged on the outer cover plate 3 and the inner cover plate 4, an end face sealing type static seal is formed between corresponding bonding faces on the first sealing ring 33 and the bearing seat, and a triangular groove type static seal is formed between corresponding bonding faces on the second sealing ring 41 and the bearing seat; the novel bearing is characterized in that bearing inner ring limiting auxiliary parts 11 are arranged on the main shaft on the inner side and the outer side of the bearing, third sealing rings 12 are arranged on the limiting auxiliary parts 11 on the outer side of the bearing, oil seal type dynamic seals are formed between the combining surfaces of the third sealing rings 12 and the outer cover plate, fourth sealing rings 13 are further arranged on the main shaft 1, oil seal type dynamic seals are formed between the combining surfaces of the fourth sealing rings 13 and the inner cover plate 4, and the diameters of the dynamic seals are smaller than the outer diameter of the bearing.
In this embodiment, the inner side surface of the outer cover plate is provided with a counter bore 31 for accommodating the bolt head of the long bolt, the bearing seat 5 is provided with a through hole for the screw rod of the long bolt 7 to pass through, and the inner cover plate is provided with a blind hole with internal threads, which is matched with the screw rod of the long bolt; the outside apron 3 is last to be provided with the through-hole that supplies the screw rod of short bolt 6 to pass, outside apron 3 lateral surface is provided with the accommodation counter bore 32 that holds short bolt head, the bearing frame 5 outside is provided with the through-hole or the blind hole that take the internal thread and the screw rod assorted of short bolt, can effectively shorten seal structure's axial distance like this, realizes the assembly more easily under the little condition of assembly space.
In addition, in the present embodiment, the outer ring of the bearing 2 is provided with an oil inlet 21, and the outer ring of the bearing is provided with an annular oil inlet groove 22 communicated with the oil inlet of the outer ring of the bearing, and the annular oil inlet groove 22 is communicated with an oil inlet oil path 52 on the bearing seat; the inner cover plate 4 and the outer cover plate 3 are provided with oil return grooves 9, the bearing seat 5 is internally provided with oil return oil collecting grooves 54, the oil return grooves 9 and the oil return oil collecting grooves 54 are communicated, and the oil return oil collecting grooves 54 are communicated with an oil return oil way 53. Because the circumferential positioning device is not arranged between the bearing 2 and the bearing seat 5, the oil inlet channel 52 on the bearing seat is not easy to be communicated with the oil inlet hole of the bearing outer ring, for this purpose, the annular oil inlet groove 22 communicated with the oil inlet hole of the bearing outer ring is arranged on the bearing outer ring, the annular oil inlet groove 22 is communicated with the oil inlet channel 52 on the bearing seat, and because of the existence of the annular oil inlet groove 22, even if the bearing rotates in the circumferential direction, the oil inlet hole 21 on the bearing outer ring can ensure continuous supply of oil; in addition, owing to be provided with oil return groove 9 on inboard apron 4 and the outside apron 3, be provided with oil return oil sump 54 in the bearing frame, oil return groove 9 and oil return oil sump 54 switch on, oil return oil sump 54 switches on with oil return oil circuit 53, and oil return groove 10 and oil return oil sump 54's setting makes the oil return speed accelerate, and the oil return is more smooth and easy, and the oil mass that oil feed oil circuit 52 unit time supplied also can be more like this, and whole oil circuit flow can all increase, and the flow is big, can take away more heat, and the lubrication and the cooling effect of bearing also can be better, and the life of bearing must be prolonged, has alleviateed maintenance's work load like this also.
In addition, in the present embodiment, the coverage of the oil return groove 54 on the inner cover plate and the outer cover plate in the circumferential direction is less than 1/4 turn. In practical application, the coverage area of the oil return grooves 9 on the inner cover plate and the outer cover plate in the circumferential direction is smaller than half a circle, and the positioning failure of the bearing 1 can be caused by the oversized oil return grooves.
In practical application, the avoidance counter bore 31 for accommodating the bolt head of the long bolt can also be arranged on the outer side surface of the bearing seat; the annular oil inlet groove can also be arranged in the bearing mounting hole of the bearing seat, and is communicated with the oil inlet hole 21 of the bearing outer ring and simultaneously communicated with the oil inlet oil way 52 on the bearing seat 5.
The static seal can also adopt piston seal, piston rod seal, sealing gasket or sealant. .
The dynamic seal can also be a dry gas seal, a labyrinth seal or a tooth seal.
While the technical content and features of the present utility model have been disclosed above, it will be understood that various changes and modifications to the above-described structure, including combinations of technical features individually disclosed or claimed herein, and other combinations of these features obviously will be included, can be made by those skilled in the art without departing from the spirit of the utility model, i.e., the idea of creation. Such variations and/or combinations fall within the technical field to which the utility model relates and fall within the scope of the claims of the utility model.
Claims (9)
1. The bearing sealing structure for the high-speed motor comprises a main shaft, a bearing, an outer cover plate, an inner cover plate and a bearing seat, wherein the bearing is arranged on the main shaft; dynamic seals are respectively arranged between the inner cover plate and the main shaft, and the diameters of the dynamic seals are smaller than the outer diameter of the bearing.
2. The bearing sealing structure for the high-speed motor according to claim 1, wherein the inner side surface of the outer cover plate or the outer side surface of the bearing seat is provided with an avoidance counter bore for accommodating a long bolt head, the bearing seat is provided with a through hole for a screw rod of the long bolt to pass through, and the inner cover plate is provided with a through hole or a blind hole with internal threads, which is matched with the screw rod of the long bolt; the outer cover plate is provided with a through hole for the screw rod of the short bolt to pass through, the outer side surface of the outer cover plate is provided with a receiving counter bore for receiving the bolt head of the short bolt, and the outer side of the bearing seat is provided with a through hole or a blind hole with internal threads and matched with the screw rod of the short bolt.
3. The bearing seal structure for a high-speed motor according to claim 1, wherein the static seal is a piston seal, a piston rod seal, a delta groove seal, an end face seal, a gasket or a sealant.
4. The bearing seal structure for a high-speed motor according to claim 1, wherein: the dynamic seal is a dry gas seal, an oil seal, an air seal, a labyrinth seal or a tooth seal.
5. A bearing seal structure for a high-speed motor according to claim 1 or claim 2 or claim 3 or claim 4, characterized in that: the bearing outer ring is provided with an oil inlet hole, an annular oil inlet groove communicated with the oil inlet hole of the bearing outer ring is arranged in the bearing mounting hole of the bearing seat or on the bearing outer ring, and the annular oil inlet groove is communicated with an oil inlet oil way on the bearing seat; the oil return device is characterized in that oil return grooves are formed in the inner cover plate and the outer cover plate, oil return oil collecting grooves are formed in the bearing seat, and are communicated with the oil return oil collecting grooves, and the oil return oil collecting grooves are communicated with an oil return path.
6. The bearing seal structure for a high-speed motor according to claim 5, wherein the main shaft is provided with bearing inner race limit auxiliaries on both inner and outer sides of the bearing.
7. The bearing seal structure for a high-speed motor according to claim 6, wherein a dynamic seal is provided between the limit auxiliary member outside the bearing and the outside cover plate.
8. The bearing seal structure for a high-speed motor according to claim 5, wherein the oil return grooves on the inner cover plate and the outer cover plate have a coverage area of less than half a turn in the circumferential direction.
9. The bearing seal structure for a high-speed motor according to claim 8, wherein the coverage area of the oil return grooves on the inner cover plate and the outer cover plate in the circumferential direction is less than 1/4 turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322461389.7U CN220732496U (en) | 2023-09-11 | 2023-09-11 | Bearing sealing structure for high-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322461389.7U CN220732496U (en) | 2023-09-11 | 2023-09-11 | Bearing sealing structure for high-speed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220732496U true CN220732496U (en) | 2024-04-05 |
Family
ID=90494027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322461389.7U Active CN220732496U (en) | 2023-09-11 | 2023-09-11 | Bearing sealing structure for high-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220732496U (en) |
-
2023
- 2023-09-11 CN CN202322461389.7U patent/CN220732496U/en active Active
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