CN107830176B - Bearing positive pressure dustproof structure - Google Patents
Bearing positive pressure dustproof structure Download PDFInfo
- Publication number
- CN107830176B CN107830176B CN201711306690.3A CN201711306690A CN107830176B CN 107830176 B CN107830176 B CN 107830176B CN 201711306690 A CN201711306690 A CN 201711306690A CN 107830176 B CN107830176 B CN 107830176B
- Authority
- CN
- China
- Prior art keywords
- bearing
- compressed air
- air
- injection pipe
- chamber cavity
- 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.)
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Links
- 125000006850 spacer group Chemical group 0.000 claims abstract description 43
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 18
- 230000002265 prevention Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a positive pressure dustproof structure of a bearing, which comprises a bearing seat, a bearing, a shaft and a spacer, wherein the spacer is arranged on the shaft in interference fit, and the spacer is in clearance fit with the bearing seat; a bearing chamber cavity is formed between the spacer bush and the bearing, a hole matched with the compressed air injection pipe is formed in the bearing seat, and the length of the compressed air injection pipe inserted into the bearing chamber cavity is larger than the gap between the spacer bush and the bearing seat. The compressed air injection pipe is communicated with the bearing chamber cavity, clean compressed air is injected into the bearing chamber cavity through the compressed air injection pipe at a relative pressure of 3 kPa-5 kPa to form positive pressure, and because of the positive pressure existing in the bearing chamber cavity, the compressed air flows out from a gap between the spacer bush and the bearing seat, and dust, muddy water and the like are prevented from entering the bearing chamber cavity due to the action of air flow, so that the aim of dust prevention is achieved. The continuously flowing compressed air enhances the heat dissipation function of the bearing chamber, thereby reducing the temperature of the bearing, improving the running environment of the bearing and prolonging the service life of the bearing.
Description
Technical Field
The invention belongs to the technical field of bearings, and particularly relates to a positive pressure dustproof structure of a bearing.
Background
Bearings are components that act to fix and reduce the coefficient of friction of a load during mechanical transmission, and can also be said to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed when other parts are moved relative to each other on the shaft. The bearing is a weight-bearing part in modern mechanical equipment. Its main function is to support the mechanical rotator for reducing the mechanical load friction coefficient of the device during transmission. However, the bearing is a sensitive element to the working environment, and dust enters the bearing chamber to seriously damage grease and lubrication of the bearing, so that abnormal abrasion of the bearing is caused, the bearing failure is accelerated, and therefore, some enterprises begin to study the dust-proof structure of the bearing.
At present, the bearing dustproof structure mainly comprises two modes of contact type sealing and dustproof labyrinth. Both dustproof structures can only realize passive dust prevention. For the contact type dustproof structure, dust can still accumulate at the edge of the contact type dustproof structure and damage the dustproof structure; for the labyrinth dust-proof structure, dust still enters the bearing chamber interior through the labyrinth gap. Dust enters the bearing chamber, so that abrasion among the rolling bodies, the bearing outer ring and the bearing inner ring is increased, the service life of the bearing is short, the abrasion rate is high, and the replacement times are frequent.
Disclosure of Invention
Aiming at the defects of the bearing dustproof structure in the prior art, the invention aims to provide the bearing positive pressure dustproof structure with the dustproof and radiating functions, which is used for solving the problems that dust still enters the bearing chamber through a gap or is accumulated at the edge of the dustproof structure and damages the dustproof structure after the traditional dustproof structure is used for a period of time.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a bearing malleation dustproof construction, includes bearing frame, bearing and axle, bearing malleation dustproof construction still includes the spacer, the spacer is fixed to be cup jointed on the axle, the spacer with form the bearing room cavity between the bearing frame is equipped with the hole with compressed air injection pipe adaptation.
Further, the spacer bush is in interference fit with the shaft, and the spacer bush is in clearance fit with the bearing seat.
Further, the clearance value between the spacer bush and the bearing seat is 0.8-0.12 mm.
Further, the compressed air injection pipe is communicated with the bearing chamber cavity, compressed air enters the bearing chamber cavity through the compressed air injection pipe, and is discharged to the atmosphere through a gap between the spacer bush and the bearing seat.
Further, the length of the compressed air injection pipe inserted into the cavity of the bearing chamber is larger than the gap between the spacer bush and the bearing seat.
Further, the pressure of the air injected into the bearing chamber cavity by the compressed air injection pipe is 3 kPa-5 kPa.
Further, the compressed air injection pipe is connected with an air source, a pressure regulating valve, an air filter and an air dryer are sequentially arranged between the air source and the compressed air injection pipe, and the pressure regulating valve, the air filter and the air dryer are communicated with the compressed air injection pipe.
Further, the pressure of the compressed air provided by the air source is controlled by the pressure regulating valve, the air is filtered and dried by the air filter and the air dryer in sequence, and finally the clean and dry compressed air enters the cavity of the bearing chamber through the compressed air injection pipe.
Further, an air pressure detection sensor I is arranged in the cavity of the bearing chamber, and an air pressure detection sensor II is arranged on the discharge side of the spacer bush compressed air.
Further, the air pressure detection sensor I detects the air pressure in the bearing chamber cavity, the air pressure detection sensor II detects the air pressure outside the bearing chamber cavity, and according to the value detected by the air pressure detection sensor I and the air pressure detection sensor II, the pressure regulating valve is regulated to ensure that the air pressure value detected by the air pressure detection sensor I is greater than the air pressure value detected by the air pressure detection sensor II.
The technical scheme of the invention has the advantages that:
1. Because the positive pressure exists in the cavity of the bearing chamber, compressed air flows out from the gap between the spacer bush and the bearing seat, and dust, muddy water and the like are prevented from entering the cavity of the bearing chamber due to the action of air flow, so that the aim of dust prevention is achieved, and lubrication failure and abnormal abrasion of the bearing caused by the entering of the dust and the muddy water are avoided.
2. The continuously flowing compressed air enhances the heat dissipation function of the bearing chamber, thereby reducing the temperature of the bearing, improving the running environment of the bearing and prolonging the service life of the bearing.
3. The gap inherent between the spacer bush and the bearing seat is used as a compressed air outflow channel, and the compressed air outflow channel does not need to be additionally processed, so that the processing cost is saved.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
fig. 1 is a schematic view of the whole structure of the positive pressure dust-proof structure of the bearing of the present invention.
The labels in the above figures are respectively: 1. a bearing seat; 2. a bearing; 3. a shaft; 4. a spacer bush; 5. a compressed air injection pipe; 6. a bearing chamber cavity; 7. a hole; 8. a gas source; 9. a pressure regulating valve; 10. an air filter; 11. an air dryer; 12. the air pressure detection sensor I; 13. and an air pressure detection sensor II.
Detailed Description
In the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in FIG. 1, arrows in the drawing represent the flow direction of compressed air, and the positive pressure dustproof structure of the bearing comprises a bearing seat 1, a bearing 2, a shaft 3 and a spacer 4, wherein the spacer 4 is fixedly sleeved on the shaft 3, the spacer 4 is in interference fit with the shaft 3, and the spacer 4 is in clearance fit with the bearing seat 1; a bearing chamber cavity 6 is formed between the spacer bush 4 and the bearing 2, and a hole 7 matched with the compressed air injection pipe 5 is formed in the bearing seat 1. The compressed air injection pipe 5 is communicated with the bearing chamber cavity 6, and the compressed air enters the bearing chamber cavity 6 through the compressed air injection pipe 5 and is discharged to the atmosphere through a gap between the spacer bush 4 and the bearing seat 1. The gap inherent between the spacer bush 4 and the bearing seat 1 is used as a compressed air outflow channel, so that the compressed air outflow channel does not need to be additionally processed, and the processing cost is saved. Theoretical design and test prove that the clearance value between the spacer bush 4 and the bearing seat 1 is preferably 0.8-0.12 mm, if the clearance between the spacer bush 4 and the bearing seat 1 is too large, the dustproof effect is poor, and the large clearance can necessarily lead to the increase of air flow and the waste of compressed air; if the gap between the spacer 4 and the bearing housing 1 is too small, the dust-proof effect is good but the processing cost is increased. The clearance value between the spacer bush 4 and the bearing seat 1 is selected to be 0.8-0.12 mm by comprehensively considering the dustproof effect and the processing cost.
The length of the compressed air injection pipe 5 inserted into the bearing chamber cavity 6 is larger than the gap between the spacer bush 4 and the bearing seat 1, the design can ensure that the compressed air entering the bearing chamber cavity 6 from the compressed air injection pipe 5 is discharged through the gap between the spacer bush 4 and the bearing seat 1 after the compressed air moves round in the bearing chamber cavity 6, so that the compressed air can take away more heat in the bearing chamber, the continuously flowing compressed air enhances the heat dissipation function of the bearing chamber, thereby reducing the temperature of the bearing 2, improving the running environment of the bearing 2 and prolonging the service life of the bearing 2.
The compressed air injection pipe 5 is connected with an air source 8, a pressure regulating valve 9, an air filter 10 and an air dryer 11 are sequentially arranged between the air source 8 and the compressed air injection pipe 5, and the pressure regulating valve 9, the air filter 10 and the air dryer 11 are communicated with the compressed air injection pipe 5. The pressure of the compressed air provided by the air source 8 is controlled by the pressure regulating valve 9, the air is filtered and dried by the air filter 10 and the air dryer 11 in sequence, the clean and dry compressed air enters the bearing chamber cavity 6 through the compressed air injection pipe 5, and finally is discharged through the gap between the spacer bush 4 and the bearing seat 1. Preferably, the pressure of the compressed air injected into the bearing chamber cavity 6 by the compressed air injection pipe 5 is 3kPa to 5kPa; verification according to the test: if the pressure of the compressed air is less than 3kPa, the air flow is slow, so that the dustproof effect is poor; if the pressure of the compressed air is more than 5kPa, the structure of the bearing 2 is affected. Clean compressed air is injected into the bearing chamber cavity 6 through the compressed air injection pipe 5 at a relative pressure of 3 kPa-5 kPa, positive pressure is formed in the bearing chamber cavity 6, and due to the positive pressure existing in the bearing chamber cavity 6, the compressed air flows out of a gap between the spacer bush 4 and the bearing seat 1, and dust, muddy water and the like are prevented from entering the bearing chamber cavity 6 due to the action of air flow, so that the aim of dust prevention is achieved, and lubrication failure and abnormal abrasion of the bearing 2 caused by the entry of dust and muddy water are avoided.
Preferably, an air pressure detecting sensor I12 is arranged in the bearing chamber cavity 6, and an air pressure detecting sensor II 13 is arranged on the discharge side of the compressed air of the spacer bush 4. The air pressure detection sensor I12 detects the air pressure in the bearing chamber cavity 6, the air pressure detection sensor II 13 detects the air pressure outside the bearing chamber cavity 6, and according to the values detected by the air pressure detection sensor I12 and the air pressure detection sensor II 13, the pressure regulating valve 9 is regulated to ensure that the air pressure value detected by the air pressure detection sensor I12 is greater than the air pressure value detected by the air pressure detection sensor II 13, so that the bearing chamber cavity 6 is guaranteed to be positive pressure, the compressed air always flows out of the bearing chamber cavity 6, the phenomenon of gas backflow under extreme conditions is avoided, and the dust prevention effect cannot be realized if the phenomenon of gas backflow occurs.
The invention has the advantages of low cost, easy realization and the like, and can be widely applied to dust prevention and water prevention of bearings working in the environments of field operation, mines, multiple rains and the like. The positive pressure dustproof structure of the bearing utilizes positive pressure gas to actively blow off dust, thoroughly avoids dust from entering the bearing chamber, and prolongs the service life and reliability of the bearing.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the invention is not limited by the foregoing, but rather, it is within the scope of the invention to adopt various insubstantial modifications of the technical scheme of the invention, or to apply the inventive concept and technical scheme of the invention directly to other occasions without any modifications.
Claims (5)
1. The utility model provides a bearing malleation dustproof construction, includes bearing frame (1), bearing (2) and axle (3), its characterized in that: the bearing positive pressure dustproof structure further comprises a spacer bush (4), the spacer bush (4) is fixedly sleeved on the shaft (3), a bearing chamber cavity (6) is formed between the spacer bush (4) and the bearing (2), and a hole (7) matched with the compressed air injection pipe (5) is formed in the bearing seat (1); the spacer bush (4) is in interference fit with the shaft (3), and the spacer bush (4) is in clearance fit with the bearing seat (1); the clearance value between the spacer bush (4) and the bearing seat (1) is 0.8-0.12 mm; the compressed air injection pipe (5) is communicated with the bearing chamber cavity (6), compressed air enters the bearing chamber cavity (6) through the compressed air injection pipe (5), and is discharged to the atmosphere through a gap between the spacer bush (4) and the bearing seat (1); the length of the compressed air injection pipe (5) inserted into the bearing chamber cavity (6) is larger than the gap between the spacer bush (4) and the bearing seat (1); the compressed air injection pipe (5) is connected with the air source (8), the air source (8) and a pressure regulating valve (9), an air filter (10) and an air dryer (11) are sequentially arranged between the compressed air injection pipe (5), and the pressure regulating valve (9), the air filter (10) and the air dryer (11) are all communicated with the compressed air injection pipe (5).
2. A positive pressure dust-proof structure for a bearing as set forth in claim 1, wherein: the pressure of the air injected into the bearing chamber cavity (6) by the compressed air injection pipe (5) is 3 kPa-5 kPa.
3. A positive pressure dust-proof structure for a bearing as claimed in claim 2, wherein: compressed air provided by the air source (8) passes through the pressure regulating valve (9) to control the pressure of the compressed air, then passes through the air filter (10) and the air dryer (11) in sequence to filter and dry the air, and finally clean and dry compressed air enters the bearing chamber cavity (6) through the compressed air injection pipe (5).
4. A positive pressure dust-proof structure for a bearing as set forth in claim 1, wherein: an air pressure detection sensor I (12) is arranged in the bearing chamber cavity (6), and an air pressure detection sensor II (13) is arranged on the discharge side of compressed air of the spacer bush (4).
5. The positive pressure dust-proof structure of a bearing as set forth in claim 4, wherein: the air pressure detection sensor I (12) detects air pressure in the bearing chamber cavity (6), the air pressure detection sensor II (13) detects air pressure outside the bearing chamber cavity (6), and according to the numerical value detected by the air pressure detection sensor I (12) and the air pressure detection sensor II (13), the pressure regulating valve (9) is regulated to ensure that the air pressure value detected by the air pressure detection sensor I (12) is greater than the air pressure value detected by the air pressure detection sensor II (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711306690.3A CN107830176B (en) | 2017-12-11 | 2017-12-11 | Bearing positive pressure dustproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711306690.3A CN107830176B (en) | 2017-12-11 | 2017-12-11 | Bearing positive pressure dustproof structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107830176A CN107830176A (en) | 2018-03-23 |
| CN107830176B true CN107830176B (en) | 2024-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711306690.3A Active CN107830176B (en) | 2017-12-11 | 2017-12-11 | Bearing positive pressure dustproof structure |
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| Country | Link |
|---|---|
| CN (1) | CN107830176B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032162A (en) * | 2018-04-18 | 2019-07-19 | 沈阳铝镁设计研究院有限公司 | A kind of DCS/PLC control cabinet and its application method with positive pressure |
| CN111044425A (en) * | 2020-01-10 | 2020-04-21 | 常熟市易安达电器有限公司 | Dust sensor with low failure rate |
| CN111912390B (en) * | 2020-08-31 | 2022-06-21 | 重庆工程职业技术学院 | Protection type inclinometer |
| CN114483797B (en) * | 2022-02-14 | 2023-10-31 | 西北工业大学 | Bearing sealing method under high pollution environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1182756A (en) * | 1997-09-05 | 1999-03-26 | Nippon Seiko Kk | Bearing device |
| CN201487215U (en) * | 2009-09-11 | 2010-05-26 | 天津市中环天佳电子有限公司 | Shaft seal device of high-speed powder mixer |
| CN102383605A (en) * | 2011-11-24 | 2012-03-21 | 三一重工股份有限公司 | Lubrication system of concrete machine and concrete machine |
| CN204301476U (en) * | 2014-11-28 | 2015-04-29 | 华润水泥技术研发有限公司 | A kind of supporting roller of rotary kiln bearing assembly |
| CN207687354U (en) * | 2017-12-11 | 2018-08-03 | 玉柴联合动力股份有限公司 | A kind of bearing positive pressure dust-proof structure |
-
2017
- 2017-12-11 CN CN201711306690.3A patent/CN107830176B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1182756A (en) * | 1997-09-05 | 1999-03-26 | Nippon Seiko Kk | Bearing device |
| CN201487215U (en) * | 2009-09-11 | 2010-05-26 | 天津市中环天佳电子有限公司 | Shaft seal device of high-speed powder mixer |
| CN102383605A (en) * | 2011-11-24 | 2012-03-21 | 三一重工股份有限公司 | Lubrication system of concrete machine and concrete machine |
| CN204301476U (en) * | 2014-11-28 | 2015-04-29 | 华润水泥技术研发有限公司 | A kind of supporting roller of rotary kiln bearing assembly |
| CN207687354U (en) * | 2017-12-11 | 2018-08-03 | 玉柴联合动力股份有限公司 | A kind of bearing positive pressure dust-proof structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107830176A (en) | 2018-03-23 |
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