CN107643172B - Mounting structure of upper angular contact bearing in overspeed test stand host - Google Patents
Mounting structure of upper angular contact bearing in overspeed test stand host Download PDFInfo
- Publication number
- CN107643172B CN107643172B CN201711030644.5A CN201711030644A CN107643172B CN 107643172 B CN107643172 B CN 107643172B CN 201711030644 A CN201711030644 A CN 201711030644A CN 107643172 B CN107643172 B CN 107643172B
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- angular contact
- ring
- rotor
- contact bearing
- bearing
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- 238000007667 floating Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The invention discloses a mounting structure of an upper angular contact bearing in an overspeed test stand host machine, which comprises a shell, a stator, a rotor and an upper angular contact bearing, wherein the stator is fixed in the shell, the rotor is rotatably supported in the stator, the upper angular contact bearing is sleeved on the rotor, the mounting structure also comprises an upper bearing seat, an upper spring, an upper floating ring and a shaft sleeve ring, the upper bearing seat is fixedly connected to the top end of the shell, the upper angular contact bearing is arranged in the upper bearing seat, the shaft sleeve ring is sleeved on the rotor, the shaft sleeve ring is in interference fit with the rotor, one end of the shaft sleeve ring is abutted against the inner ring of the upper angular contact bearing, and the other end of the shaft sleeve ring extends into the upper bearing seat; the upper floating ring is sleeved on the rotor, the upper spring is arranged in the upper bearing seat, the top end of the upper spring is abutted to the upper floating ring, and the upper floating ring is abutted to the outer ring of the upper angular contact bearing. The invention has simple structure, convenient disassembly and good sealing effect.
Description
Technical field:
the invention relates to an installation structure of an upper angular contact bearing in an overspeed test stand host.
The background technology is as follows:
at present, the angular contact bearing of the rotor is arranged according to the relative stress direction of the bearing, so that no influence is caused on actual work, but when the bearing is disassembled and replaced, due to the high-speed precise bearing, the rotor, the bearing and the bearing seat are tightly matched, so that when the bearing is disassembled by pulling the upper bearing seat, the outer ring of the upper angular contact bearing in the upper bearing seat can be driven to move in the direction opposite to the normal stress direction of the bearing, and the inner ring and the outer ring of the upper bearing seat are easily separated, so that the bearing is damaged.
In addition, the middle shaft sleeve ring of the existing overspeed test stand main machine can not limit the rotor, so that when the impeller is not mounted on the rotor, the rotor naturally falls down in the main machine, the shaft sleeve ring adopts a return type hook for sealing and dust prevention, and the processing is complex.
The invention comprises the following steps:
the invention provides a mounting structure of an upper angular contact bearing in an overspeed test stand host machine, which aims to solve the problems in the prior art.
The invention adopts the technical scheme that: the upper angular contact bearing mounting structure comprises a shell, a stator, a rotor and an upper angular contact bearing, wherein the stator is fixed in the shell, the rotor is rotatably supported in the stator, the upper angular contact bearing is sleeved on the rotor, the upper angular contact bearing further comprises an upper bearing seat, an upper spring, an upper floating ring and a shaft sleeve ring, the upper bearing seat is fixedly connected to the top end of the shell, the upper angular contact bearing is arranged in the upper bearing seat, the shaft sleeve ring is sleeved on the rotor, the shaft sleeve ring is in interference fit with the rotor, one end of the shaft sleeve ring is abutted to the inner ring of the upper angular contact bearing, and the other end of the shaft sleeve ring extends into the upper bearing seat; the upper floating ring is sleeved on the rotor, the upper spring is arranged in the upper bearing seat, the top end of the upper spring is abutted to the upper floating ring, and the upper floating ring is abutted to the outer ring of the upper angular contact bearing.
Further, a first boss portion is arranged on the upper bearing seat, a second boss portion is arranged on the first boss portion, and an upper positioning step hole matched with the first boss portion and the second boss portion is formed in the machine shell.
Further, a first step hole with two step surfaces is arranged in the axis direction of the upper bearing seat, a sealing groove is arranged on the step surface at the upper end of the first step hole, and an upper spring mounting groove is arranged on the step surface at the lower end of the first step hole.
Further, protruding sealing parts are arranged at two ends of the shaft collar and extend into the sealing groove.
Further, protruding locating parts are arranged at two ends of the upper floating ring and are abutted against the outer ring of the upper angular contact bearing.
Further, a half-thread through hole is formed in the shaft collar, and a set screw is connected to the half-thread through hole in a threaded mode.
The invention has the following beneficial effects:
1) The arrangement mode of the stress direction of the upper angular contact bearing is changed, so that the stress is the stress direction during normal operation and the bearing is not damaged when the inner ring and the outer ring of the bearing are detached;
2) The upper angular contact bearing outer ring is fixed at one end instead of the existing two ends, so that the upper angular contact bearing outer ring can slightly float along with the inner ring up and down, and the upper spring is arranged so that the inner ring and the outer ring of the upper angular contact bearing are kept synchronous and are not separated when floating up and down;
3) The shaft lantern ring is in interference fit with the rotor, so that an axial positioning effect is achieved on the idle rotor without the impeller, and the rotor cannot fall off; the sealing structure is simplified to the axle lantern ring, is convenient for process and assembly, and half screw thread through-hole on the axle lantern ring is convenient for increase lubricating grease, and when dismantling the axle lantern ring, half screw thread through-hole still can be as the point of application, and a hole is multi-purpose.
Description of the drawings:
FIG. 1 is a block diagram of the present invention in an overspeed test stand host.
Fig. 2 and 3 are enlarged structural views of the present invention.
Fig. 4 shows the structure of the upper bearing seat, upper floating ring and shaft collar of the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the invention discloses an installation structure of an upper angular contact bearing in an overspeed test stand host, which comprises a casing 11, a stator 12, a rotor 13, an upper angular contact bearing 21, an upper bearing seat 31, an upper spring 32, an upper floating ring 33 and a shaft sleeve ring 34, wherein the stator 12 is fixed in the casing 11, the rotor 13 is rotatably supported in the stator 12, the upper bearing seat 31 is fixedly connected to the top end of the casing 11, the upper angular contact bearing 21 is sleeved on the rotor 13, the upper angular contact bearing 21 is arranged in the upper bearing seat 31, the shaft sleeve ring 34 is sleeved on the rotor 13, and the shaft sleeve ring 34 is in interference fit with the rotor 13. One end of the shaft collar 34 abuts against the inner ring of the upper angular contact bearing 21, and the other end extends into the upper bearing housing 31. The upper floating ring 33 is sleeved on the rotor 13, the upper spring 32 is arranged in the upper bearing seat 31, the top end of the upper spring 32 is abutted on the upper floating ring 33, and the upper floating ring 33 is abutted on the outer ring of the upper angular contact bearing 21.
The upper bearing housing 31 in the present invention is provided with a first boss portion 311, a second boss portion 312 is provided on the first boss portion 311, the second boss portion 312 and the upper bearing housing 31 are coaxially provided, and the diameter of the first boss portion 311 is larger than the diameter of the second boss portion 312. Correspondingly, an upper positioning step hole matched with the first boss portion 311 and the second boss portion 312 is provided on the housing 11.
In order to facilitate positioning and mounting of the upper angular contact bearing 21, a first stepped hole 310 having two stepped surfaces (an upper end stepped surface a and a lower end stepped surface B) is provided in the axial direction of the upper bearing housing 31, a seal groove 3101 is provided on the upper end stepped surface a of the first stepped hole 310, an upper spring mounting groove 3102 is provided on the lower end stepped surface B of the first stepped hole 310, and an upper spring 32 is placed in the upper spring mounting groove 3102.
To ensure the sealing effect, protruding sealing portions 341 are provided at both ends of the sleeve ring 34, and the protruding sealing portions 341 extend into the seal groove 3101. The protruding sealing portion 341 is matched with the sealing groove 3101, so that dust can be effectively prevented from entering the upper angular contact bearing 21, and the rotation effect is affected. The boss ring 34 is provided with a boss positioning table 342, and the boss positioning table 342 abuts against the inner ring of the upper angular contact bearing 21.
The sleeve ring 34 is provided with a half-threaded through hole, and the set screw 6 is screwed into the half-threaded through hole. The half-threaded through holes facilitate the addition of grease. During operation, the set screw 6 is in threaded connection in the half-thread through hole, blocks up the screw hole and is used for preventing dust.
Protruding positioning parts 331 are provided at both ends of the upper floating ring 33, and the protruding positioning parts 331 abut against the outer ring of the upper angular contact bearing 21. The upper floating ring 33 can increase the contact area between the upper spring 32 and the upper angular contact bearing 21, and if the upper spring 32 is directly used to prop against the outer ring of the upper angular contact bearing 21, the outer ring of the bearing is worn, and on the other hand, the end face of the upper spring 32 cannot be fully contacted with the end face of the outer ring of the bearing due to the small area of the outer ring of the bearing. The upper floating ring 33 can ensure that the buffer force of the free end of the upper spring end 32 is fully applied to the outer ring of the upper angular contact bearing 21.
When the upper angular contact bearing 21 is disassembled, the upper angular contact bearing 21 can be disassembled by disassembling the upper bearing seat 31 because the upper angular contact bearing 21 is upwards stressed in the axial direction of the rotor. In the process of pulling out the upper bearing seat 31, the step surface B at the lower end of the upper bearing seat 31 pushes the outer ring of the upper angular contact bearing 21, and along with the upward movement of the outer ring of the upper angular contact bearing 21, the stress direction of the outer ring pushing the inner ring at the moment is the stress direction of the inner ring and the outer ring of the upper angular contact bearing, so that the inner ring can be driven to be detached from the rotor 13 together. When the upper bearing seat 31 is detached, the upper bearing seat 31 is pulled up, and the lower end step surface B of the upper bearing seat 31 abuts against the outer ring of the upper angular contact bearing 21, so that the upper angular contact bearing 21 is peeled off from the rotor.
In addition, the upper angular contact bearing 21 is placed in the upper bearing housing 31, and if the rotor 13 slightly floats downward during operation, the inner ring of the upper angular contact bearing 21 presses the outer ring, and the outer ring abuts against the lower end step surface B of the upper bearing housing 31, so that the upper angular contact bearing works normally. When the rotor 13 floats upward, the inner ring of the upper angular contact bearing 21 moves upward, and at this time, the upper spring 32 may move upward along with the inner ring against the outer ring of the upper angular contact bearing 21, so that the inner and outer rings of the upper angular contact bearing 21 are not separated. At the same time, the upper spring 32 can keep the inner ring and the outer ring of the upper angular contact bearing 21 from being separated when the impeller is disassembled and the rotor moves slightly upwards.
The shaft collar 34 is in interference fit with the rotor 13, and plays an axial positioning role on the idle rotor without the impeller, so that the rotor cannot fall off. The shaft collar 34 simplifies the sealing structure, is convenient to process and assemble, and the half-thread through hole on the shaft collar 34 is convenient to increase lubricating grease, and can be used as a force application point and is multipurpose when the shaft collar 34 is disassembled.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (1)
1. The utility model provides an upper angular contact bearing's in overspeed test stand host computer mounting structure, includes casing (11), stator (12), rotor (13) and upper angular contact bearing (21), stator (12) are fixed in casing (11), and rotor (13) slewing bearing is in stator (12), and upper angular contact bearing (21) cover is located on rotor (13), its characterized in that: the upper bearing seat (31) is fixedly connected to the top end of the shell (11), the upper angular contact bearing (21) is arranged in the upper bearing seat (31), the shaft sleeve ring (34) is sleeved on the rotor (13), the shaft sleeve ring (34) is in interference fit with the rotor (13), one end of the shaft sleeve ring (34) is abutted to the inner ring of the upper angular contact bearing (21), and the other end of the shaft sleeve ring (34) extends into the upper bearing seat (31); the upper floating ring (33) is sleeved on the rotor (13), the upper spring (32) is arranged in the upper bearing seat (31), the top end of the upper spring (32) is abutted against the upper floating ring (33), and the upper floating ring (33) is abutted against the outer ring of the upper angular contact bearing (21);
the upper bearing seat (31) is provided with a first boss part (311), the first boss part (311) is provided with a second boss part (312), and the shell (11) is provided with an upper positioning step hole matched with the first boss part (311) and the second boss part (312);
a first step hole (310) with two step surfaces is arranged in the axial direction of the upper bearing seat (31), a sealing groove (3101) is arranged on the step surface at the upper end of the first step hole (310), and an upper spring mounting groove (3102) is arranged on the step surface at the lower end of the first step hole (310);
two ends of the shaft sleeve ring (34) are provided with raised sealing parts (341), and the raised sealing parts (341) extend into the sealing groove (3101);
two ends of the upper floating ring (33) are provided with protruding positioning parts (331), and the protruding positioning parts (331) are abutted against the outer ring of the upper angular contact bearing (21);
the shaft sleeve ring (34) is provided with a half-thread through hole, and the inner thread of the half-thread through hole is connected with a set screw (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711030644.5A CN107643172B (en) | 2017-10-30 | 2017-10-30 | Mounting structure of upper angular contact bearing in overspeed test stand host |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711030644.5A CN107643172B (en) | 2017-10-30 | 2017-10-30 | Mounting structure of upper angular contact bearing in overspeed test stand host |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107643172A CN107643172A (en) | 2018-01-30 |
| CN107643172B true CN107643172B (en) | 2023-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711030644.5A Active CN107643172B (en) | 2017-10-30 | 2017-10-30 | Mounting structure of upper angular contact bearing in overspeed test stand host |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107643172B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0960661A (en) * | 1995-08-22 | 1997-03-04 | Denso Corp | Supporting structure of bearing |
| CN104295518A (en) * | 2014-09-28 | 2015-01-21 | 南京磁谷科技有限公司 | Magnetic levitation overspeed test bed for impeller overspeed test |
| CN204387128U (en) * | 2014-12-10 | 2015-06-10 | 广州市昊志机电股份有限公司 | Bearing pre-tightening structure |
| CN106505783A (en) * | 2016-12-19 | 2017-03-15 | 南京磁谷科技有限公司 | A kind of 280kw magnetic-suspension high-speeds blower fan structure |
| CN106525429A (en) * | 2016-12-26 | 2017-03-22 | 河南科技大学 | Angular contact bearing dual-rotor testing machine |
| CN106787417A (en) * | 2016-12-19 | 2017-05-31 | 南京磁谷科技有限公司 | A kind of magnetic suspension motor rotor structure |
| CN207423514U (en) * | 2017-10-30 | 2018-05-29 | 南京磁谷科技有限公司 | A kind of mounting structure of upper angular contact bearing in overspeed test bench host |
-
2017
- 2017-10-30 CN CN201711030644.5A patent/CN107643172B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0960661A (en) * | 1995-08-22 | 1997-03-04 | Denso Corp | Supporting structure of bearing |
| CN104295518A (en) * | 2014-09-28 | 2015-01-21 | 南京磁谷科技有限公司 | Magnetic levitation overspeed test bed for impeller overspeed test |
| CN204387128U (en) * | 2014-12-10 | 2015-06-10 | 广州市昊志机电股份有限公司 | Bearing pre-tightening structure |
| CN106505783A (en) * | 2016-12-19 | 2017-03-15 | 南京磁谷科技有限公司 | A kind of 280kw magnetic-suspension high-speeds blower fan structure |
| CN106787417A (en) * | 2016-12-19 | 2017-05-31 | 南京磁谷科技有限公司 | A kind of magnetic suspension motor rotor structure |
| CN106525429A (en) * | 2016-12-26 | 2017-03-22 | 河南科技大学 | Angular contact bearing dual-rotor testing machine |
| CN207423514U (en) * | 2017-10-30 | 2018-05-29 | 南京磁谷科技有限公司 | A kind of mounting structure of upper angular contact bearing in overspeed test bench host |
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| Publication number | Publication date |
|---|---|
| CN107643172A (en) | 2018-01-30 |
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Address after: No.99 Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province (Jiangning Development Zone) Patentee after: Nanjing Cigu Technology Co.,Ltd. Address before: 211102 No. 100 Jiuzhu Road, Jiangning Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING CIGU Ltd.,Corp. |