CN117722443A - High-speed bearing assembly - Google Patents
High-speed bearing assembly Download PDFInfo
- Publication number
- CN117722443A CN117722443A CN202311760774.XA CN202311760774A CN117722443A CN 117722443 A CN117722443 A CN 117722443A CN 202311760774 A CN202311760774 A CN 202311760774A CN 117722443 A CN117722443 A CN 117722443A
- Authority
- CN
- China
- Prior art keywords
- bearing
- spacer ring
- bearing seat
- outer spacer
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 125000006850 spacer group Chemical group 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000036316 preload Effects 0.000 abstract description 10
- 230000020169 heat generation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Support Of The Bearing (AREA)
Abstract
The invention discloses a high-speed bearing assembly, which comprises a bearing seat, wherein the inner diameter of the bearing seat is of a through hole structure, an outer spacer ring is arranged in an inner cavity of the bearing seat, an inner spacer ring used for sleeving a rotating shaft is arranged in a central hole of the outer spacer ring, a bearing III and a bearing I are arranged back to back at one end of the outer spacer ring in the inner cavity of the bearing seat, and the outer ring of the bearing III is provided with a flange; the other end of the outer spacer ring in the inner cavity of the bearing seat is provided with a bearing II, two ends of the bearing seat are respectively provided with a clamp spring groove, clamp springs are arranged in the clamp spring grooves, and the clamp springs at the two ends are respectively used for axially positioning a bearing III and a bearing II. The invention can improve the precision of the bearing seat of the bearing assembly, improve the bearing performance and rigidity of the bearing assembly, and reduce the influence of high-speed thermal expansion on bearing preload.
Description
Technical Field
The invention belongs to the technical field of bearings, and particularly relates to a high-speed bearing assembly.
Background
The precision of the bearing assembly is one of important parameters affecting the high-speed performance of the bearing assembly, and when the precision is too low, vibration and heating increase during bearing rotation, so that early failure of the bearing is caused. When the bearing is in interference fit with the bearing seat, the precision of the bearing seat can directly influence the precision of the bearing. Another important parameter affecting high speed performance is bearing preload, where heat generation of the bearing tends to change the magnitude of the bearing preload, and excessive preload at high temperature of the bearing aggravates heat generation of the bearing, and excessive preload causes slipping and wear of the bearing, and in order to improve the bearing capacity, rigidity and high speed performance of the bearing assembly, the invention proposes a flange bearing-based bearing assembly, which is different from the existing bearing assembly.
Disclosure of Invention
The invention provides a high-speed bearing assembly, which improves the precision of a bearing seat of the bearing assembly, improves the bearing performance and rigidity of the bearing assembly, and reduces the influence of high-speed thermal expansion on bearing preload.
The invention is realized by the following technical scheme:
the high-speed bearing assembly comprises a bearing seat, wherein the inner diameter of the bearing seat is of a through hole structure, an outer spacer ring is arranged in an inner cavity of the bearing seat, an inner spacer ring used for sleeving a rotating shaft is arranged in a central hole of the outer spacer ring, a bearing III and a bearing I are arranged back to back at one end of the outer spacer ring in the inner cavity of the bearing seat, and an outer ring of the bearing III is provided with a flange;
the other end of the outer spacer ring in the inner cavity of the bearing seat is provided with a bearing II, two ends of the bearing seat are respectively provided with a clamp spring groove, clamp springs are arranged in the clamp spring grooves, and the clamp springs at the two ends are respectively used for axially positioning a bearing III and a bearing II.
Further, the outer spacer is coaxially arranged with the bearing III, the bearing I and the bearing II.
Furthermore, the bearing I, the bearing II and the bearing III are all angular contact ball bearings.
Furthermore, adjusting gaskets are arranged between the clamping springs at the two ends and the bearing III and the bearing II respectively.
Further, a wave spring is arranged between the outer space ring and the bearing II.
Furthermore, the outer diameter of the bearing II is in small clearance fit with the inner diameter of the bearing seat.
Furthermore, the outer diameters of the bearing I and the bearing III are in small interference fit with the bearing seat.
Further, the outer spacer ring is provided with a grease injection hole, and the outer spacer ring is in transition fit with the bearing seat.
Further, the bearing seat, the rotating shaft, the bearings, the inner spacer ring and the outer spacer ring are made of the same material.
Further, the outer spacer ring and the bearing seat are detachably connected or integrally formed.
The invention has the beneficial effects that:
1. the bearing seat has the advantages that the inner diameter of the bearing seat is of a through hole structure, the inner diameter machining precision is high, the coaxiality of the inner diameter surfaces of the bearing mounting positions at the two ends of the bearing seat is high, and the coaxiality of the mounting of three sets of bearings is improved. The two ends of the bearing seat are provided with snap spring grooves which are matched with the adjustment gaskets for grinding the height for axial positioning of the corresponding bearing;
2. in order to realize the axial positioning of the bearing, the invention uses a set of flange bearing which is matched with a clamp spring (after the rotating shaft is installed to axially clamp the inner ring of the bearing), and realizes the axial position positioning of a pair of angle contact ball bearings which are installed back to back. In order to improve the matching precision and the high-speed performance, the outer diameters of the bearing I and the bearing III are in small interference fit with the bearing seat. The back-to-back bearing is positioned and pre-tightened by grinding the end face of the bearing ring;
3. the wave spring of the invention carries out fixed pressure pre-tightening on the single set angular contact ball bearing II at the floating end, and the fixed pressure pre-tightening force is realized by grinding the height of the inner spacer ring. The outer diameter of the floating end angular contact ball bearing II is in small clearance fit with the inner diameter of the bearing seat, so that the wave spring can effectively reduce the influence of axial expansion of the inner spacer ring on the bearing preload change during high-speed and high-temperature operation, the bearing load-shedding slipping caused by thermal expansion is avoided, and meanwhile, the axial rigidity of a shafting can be improved by the floating end bearing II and the wave spring;
4. the bearing assembly provided by the invention uses three sets of angular contact ball bearings, has higher axial rigidity, and can bear larger axial force;
5. the outer spacer ring is provided with the grease injection holes, so that lubrication can be supplemented, and the outer spacer ring is in transition fit with the bearing seat;
6. the bearing seat, the rotating shaft, the bearings, the inner spacer ring and the outer spacer ring are made of the same material, and the same material has the same expansion coefficient at high temperature, so that the influence of high temperature on bearing preload and play is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the outer spacer ring structure of the present invention;
reference numerals: 1. the device comprises a clamp spring, 2 parts of an adjusting gasket, 3 parts of a flange bearing, 4 parts of a bearing I, 5 parts of a bearing seat, 6 parts of an outer space ring, 7 parts of an inner space ring, 8 parts of a wave spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention.
It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
As shown in the figure, the high-speed bearing assembly comprises a bearing seat 5, wherein an outer spacer ring 6 is arranged in an inner cavity of the bearing seat 5, an inner spacer ring 7 used for sleeving a rotating shaft is arranged in a central hole of the outer spacer ring 6, a bearing III 3 and a bearing I4 are arranged back to back at one end of the outer spacer ring 6 in the inner cavity of the bearing seat 5, and an outer ring of the bearing III 3 is provided with a flange which is arranged close to a port of the inner cavity of the bearing seat 5; the other end of the outer spacer ring 6 in the inner cavity of the bearing seat 5 is provided with a bearing II 9, and the bearing I4, the bearing II 9 and the bearing III 3 are preferably angular contact ball bearings and can also be bearings with other specifications.
The inner diameter of the bearing seat 5 is of a through hole structure, the processing precision of the inner diameter of the bearing seat is high, the coaxiality of the inner diameter surfaces of the mounting positions of the bearings at the two ends of the bearing seat is high, and the coaxiality of the mounting of three sets of bearings is improved. Namely, the outer spacer ring 6 is coaxially arranged with the bearing III 3, the bearing I4 and the bearing II 9. The assembly has a higher axial stiffness and can carry a greater axial force.
The two ends of the bearing seat 5 are respectively provided with a clamp spring groove, clamp springs 1 are arranged in the clamp spring grooves, and an adjusting gasket 2 is further arranged between the clamp springs 1 at the two ends and the bearing III 3 and the bearing II 9 respectively.
The clamping springs 1 at the two ends are matched with the adjustment gaskets 2 for grinding the height for use and are respectively used for axially positioning the bearing III 3 and the bearing II 9.
The flange bearing is matched with the clamp spring 1, and the axial position positioning of a pair of angle contact ball bearings which are installed back to back is realized (after the rotating shaft is installed and the bearing inner ring is axially clamped). In order to improve the matching precision and the high-speed performance, the outer diameters of the bearing III 3 and the bearing I4 are in small interference fit with the bearing seat 5. The back-to-back bearing is positioned and pre-tightened by grinding the end face of the bearing ring.
Further, a wave spring 8 is further arranged between the outer spacer ring 6 and the bearing II 9, the wave spring 8 carries out fixed pressure pre-tightening on the single-set angular contact ball bearing II 9 at the floating end, and the fixed pressure pre-tightening force is realized by grinding the height of the inner spacer ring. The outer diameter of the floating end angular contact ball bearing II 9 is in small clearance fit with the inner diameter of the bearing seat 5, and when the bearing runs at high speed and high temperature, the wave spring 8 can effectively reduce the influence of axial expansion of the inner spacer on bearing preload change, and bearing load shedding and slipping caused by thermal expansion are avoided. Meanwhile, the axial rigidity of the shafting can be improved by the floating end bearing and the wave spring.
Furthermore, the outer spacer ring 6 is provided with a grease injection hole which can supplement lubrication, and the outer spacer ring 6 is in transition fit with the bearing seat 5.
Further, the bearing seat 5, the rotating shaft, the bearings, the inner spacer 7 and the outer spacer 6 are made of the same material, and the same material has the same expansion coefficient at high temperature, so that the influence of high temperature on bearing preload and play is reduced.
The concrete assembly mode is as follows:
heating the bearing seat 5, loading the angle contact flange bearing III 3 and the angle contact ball bearing I4 which are installed back to back into the bearing seat 5 by using a tool mandrel, loading the polished adjusting gasket 2 into the bearing seat 5, and loading the clamp spring 1 at the left end into a clamp spring groove; the outer spacer ring 6 is arranged in the bearing seat 5, the inner spacer ring 7 with the polished height is arranged in the bearing seat, the wave spring 8 is arranged in the bearing seat, the floating end angular contact ball bearing II 9 is arranged in the bearing seat, the polished adjusting gasket 2 is arranged in the bearing seat, and the clamp spring 1 at the right end is arranged in the clamp spring groove, so that the installation is completed.
When the bearing assembly is used, the rotating shaft is installed, the rotating shaft is in small clearance fit with the bearing III 3, the bearing I4, the bearing II 9 and the inner spacer ring 7, and then the retracting nut is pressed tightly, and at the moment, the inner spacer ring 7 is tightly attached to the inner ring of the angular contact ball bearing II 9. The bearing assembly can bear axial forces Fa and Fb in two directions, and is more suitable for working conditions of Fa > Fb.
While the basic principles, principal features and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (10)
1. A high speed bearing assembly, characterized by: the bearing comprises a bearing seat (5), wherein the inner diameter of the bearing seat (5) is of a through hole structure, an outer spacer ring (6) is arranged in an inner cavity of the bearing seat (5), an inner spacer ring (7) for sleeving a rotating shaft is arranged in a central hole of the outer spacer ring (6), a bearing III (3) and a bearing I (4) are arranged back to back at one end of the outer spacer ring (6) in the inner cavity of the bearing seat (5), and the outer ring of the bearing III (3) is provided with a flange;
the other end of the outer spacer ring (6) in the inner cavity of the bearing seat (5) is provided with a bearing II (9), both ends of the bearing seat (5) are provided with clamp spring grooves, clamp springs (1) are arranged in the clamp spring grooves, and the clamp springs (1) at both ends are respectively used for axial positioning of a bearing III (3) and a bearing II (9).
2. A high speed bearing assembly according to claim 1, wherein: the outer spacer ring (6) is coaxially arranged with the bearing III (3), the bearing I (4) and the bearing II (9).
3. A high speed bearing assembly according to claim 1 or 2, wherein: the bearing I (4), the bearing II (9) and the bearing III (3) are all angular contact ball bearings.
4. A high speed bearing assembly according to claim 1, wherein: and adjusting gaskets (2) are arranged between the clamping springs (1) at the two ends and the bearing III (3) and the bearing II (9) respectively.
5. A high speed bearing assembly according to claim 1, wherein: a wave spring (8) is arranged between the outer spacer ring (6) and the bearing II (9).
6. A high speed bearing assembly according to claim 1, wherein: the outer diameter of the bearing II (9) is in small clearance fit with the inner diameter of the bearing seat (5).
7. A high speed bearing assembly according to claim 1, wherein: the outer diameters of the bearing I (4) and the bearing III (3) are in small interference fit with the bearing seat (5).
8. A high speed bearing assembly according to claim 1, wherein: the outer spacer ring (6) is provided with a grease injection hole, and the outer spacer ring (6) is in transition fit with the bearing seat (5).
9. A high speed bearing assembly according to claim 1, wherein: the bearing seat (5), the rotating shaft, the bearings, the inner spacer ring (7) and the outer spacer ring (6) are made of the same material.
10. A high speed bearing assembly according to claim 1, wherein: the outer spacer ring (6) and the bearing seat (5) are detachably connected or integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311760774.XA CN117722443A (en) | 2023-12-20 | 2023-12-20 | High-speed bearing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311760774.XA CN117722443A (en) | 2023-12-20 | 2023-12-20 | High-speed bearing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117722443A true CN117722443A (en) | 2024-03-19 |
Family
ID=90201289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311760774.XA Pending CN117722443A (en) | 2023-12-20 | 2023-12-20 | High-speed bearing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117722443A (en) |
-
2023
- 2023-12-20 CN CN202311760774.XA patent/CN117722443A/en active Pending
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