CN101576121B - Static-dynamic mixed oil film bearing - Google Patents
Static-dynamic mixed oil film bearing Download PDFInfo
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- CN101576121B CN101576121B CN2009101041099A CN200910104109A CN101576121B CN 101576121 B CN101576121 B CN 101576121B CN 2009101041099 A CN2009101041099 A CN 2009101041099A CN 200910104109 A CN200910104109 A CN 200910104109A CN 101576121 B CN101576121 B CN 101576121B
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Abstract
The invention discloses a static-dynamic mixed oil film bearing, which comprises a static-dynamic mixed oil film bearing 1, a main shaft 2, a return chute 6, and an oil inlet hole 10. The static-dynamic mixed oil film bearing is characterized in that the surface of an inner hole of the static-dynamic mixed oil film bearing 1 is provided with three static cavities which mutually form 120 degrees; pressure oil enters each static cavity through the oil inlet hole 10; the pressure oil returns through three coaxial return chutes 6; three step holes mutually forming 120 degrees are arranged between the static cavities and the coaxial return chutes 6; and three dynamic cavities are formed on the oil seal surface between the step cavities and the coaxial return chutes 6. The static-dynamic mixed oil film bearing better solves the contact problem between the main shaft and the static-dynamic mixed oil film bearing when the main shaft is started, and greatly improves the dynamic pressure effect of the static-dynamic mixed oil film bearing when in operation work condition and therefore obtains an ideal dynamic pressure effect, can greatly improve the rigidity of the oil membrane and the effect of homogenizing errors, and can greatly improve the return precision of a main shaft system.
Description
Technical field:
The invention belongs to the mechanical transmission bearing, the static-dynamic mixed oil film bearing that particularly a kind of machinery axis system that is used to bear alternate load uses.
Background technique:
At present, use in the enterprise more dynamic and hydrostatic bearing main structure form be with dynamic pressure cavity and static pressure chamber in the axial direction certain position setting of staggering, the dynamic and hydrostatic bearing of this structural type is to utilize static pressure to be used for carrying external load when main shaft starts; When entering the normal operation operating mode, close the pressure oil in static pressure chamber, carry external load by the kinetic pressure of dynamic pressure cavity.The bearing of this structural type is the simple combination mode of dynamic pressure and static pressure, and its complex structure, bearing capacity are not high.In recent years, someone has designed and developed the dynamic and hydrostatic bearing of dynamic pressure effect and hydrostatic effects mixed function, as the patent No. is the roll grinder grinding wheel spindle dynamic and hydrostatic bearing of ZL200520074843.2, the bearing of this structural type has been offered three static pressure chambeies and a dynamic pressure cavity, carry external load by the acting in conjunction of above-mentioned oil pocket when startup and work, made full use of the principle of dynamic pressure and static pressure melange effect, has higher oil film rigidity, but the dynamic and hydrostatic bearing of this structural type the start up period main shaft and bearing be easy to generate contact wear, under operating conditions, its dynamic pressure effect is remarkable not enough, in addition, this bearing only is suitable for the constant occasion of external load, and the machinery axis system that is unsuitable for alternate load uses.
Summary of the invention
The objective of the invention is to design in order to overcome above-mentioned the deficiencies in the prior art a kind ofly be applicable at a high speed, dynamic and hydrostatic bearing that the accurate mechanical equipment main shaft is used, it is had when main shaft starts does not contact with dynamic and hydrostatic bearing, under operating conditions, has higher active and static pressure melange effect, improve the effect of oil film rigidity and homogenizing error greatly, improve the rotating accuracy of axis system.
Static-dynamic mixed oil film bearing involved in the present invention, comprise static-dynamic mixed oil film bearing 1, main shaft 2, oil-return groove 6, oil inlet hole 10, it is characterized in that: the bore area of static-dynamic mixed oil film bearing 1 offers three static pressure chambeies that are mutually 120 °, promptly go up static pressure chamber 5, preceding static pressure chamber 9 and static pressure chamber, back 13, pressure oil enters above-mentioned each static pressure chamber by oil inlet hole 10, pressure oil is by three axial oil-return groove 6 oil returns, offer three stepped cavity that are mutually 120 ° between above-mentioned static pressure chamber and the axial oil-return groove 6, oil sealing surface between stepped cavity and the axial oil-return groove 6 has formed three dynamic pressure cavity, promptly goes up dynamic pressure cavity 3, preceding dynamic pressure cavity 7 and following dynamic pressure cavity 11.
Stepped cavity is made up of last stepped cavity 4, preceding stepped cavity 8 and back stepped cavity 12, the sectional shape of last stepped cavity 4, preceding stepped cavity 8 and back stepped cavity 12 is a rectangle, and the matching gap of the degree of depth of above-mentioned each stepped cavity and main shaft 2 and static-dynamic mixed oil film bearing 1 is got the same order of magnitude.
The arc length in last static pressure chamber 5, preceding static pressure chamber 9 and static pressure chamber, back 13 is last dynamic pressure cavity 3, preceding dynamic pressure cavity 7 and following dynamic pressure cavity 11 arc length 1～1.2 times, and the arc length of stepped cavity is last dynamic pressure cavity 3, preceding dynamic pressure cavity 7 and following dynamic pressure cavity 11 arc length 1.8～2.2 times.
The present invention has solved the problem that contacts with static-dynamic mixed oil film bearing when main shaft starts preferably, each static pressure chamber, stepped cavity, dynamic pressure cavity are mutually 120 ° and offer, be suitable for becoming varying load operation occasion, offering of each stepped cavity and dynamic pressure cavity, improved the dynamic pressure effect of hybrid hydrodynamic oil film journal bearing under operating conditions greatly, thereby obtain comparatively desirable active and static pressure effect, can significantly improve the effect of oil film rigidity and homogenizing error, can improve the rotating accuracy of axis system widely, to adapt to the needs of current machinery high speed, highi degree of accuracy development.
Description of drawings
Fig. 1 is a hybrid hydrodynamic oil film journal bearing assembling schematic representation of the present invention;
Fig. 2 is a hybrid hydrodynamic oil film journal bearing structural representation of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 3;
Wherein: the 1-static-dynamic mixed oil film bearing; The 2-main shaft; The last dynamic pressure cavity of 3-; The last stepped cavity of 4-; The last static pressure of 5-chamber; The axial oil-return groove of 6-; Dynamic pressure cavity before the 7-; Stepped cavity before the 8-; Static pressure chamber before the 9-; The 10-oil inlet hole; Dynamic pressure cavity under the 11-; Stepped cavity behind the 12-; Static pressure chamber behind the 13-.
Embodiment
Further specify as follows below in conjunction with drawings and Examples to technological scheme of the present invention:
Structure of the present invention comprises static-dynamic mixed oil film bearing 1, main shaft 2, the bore area that it is characterized in that static-dynamic mixed oil film bearing 1 offers three static pressure chambeies that are mutually 120 °, promptly go up static pressure chamber 5, preceding static pressure chamber 9 and static pressure chamber, back 13, pressure oil enters above-mentioned each static pressure chamber by oil inlet hole 10, pressure oil is by three axial oil-return groove 6 oil returns, offer three stepped cavity that are mutually 120 ° between above-mentioned static pressure oil pocket and the axial oil-return groove 6, promptly go up stepped cavity 4, preceding stepped cavity 8 and back stepped cavity 12, oil sealing surface between above-mentioned stepped cavity and the axial oil-return groove 6 has formed three dynamic pressure cavity, promptly goes up dynamic pressure cavity 3, preceding dynamic pressure cavity 7 and following dynamic pressure cavity 11.
When main shaft starts, above-mentioned each static pressure chamber feeds pressure oil, under the effect of above-mentioned static pressure chamber static pressure, main shaft and static-dynamic mixed oil film bearing endoporus disengage, raising along with spindle speed, the dynamic pressure oil film effect that is produced by above-mentioned each stepped cavity and dynamic pressure cavity increases gradually, carries external load with the static pressure acting in conjunction in above-mentioned static pressure chamber.Under the native condition of high speed, above-mentioned each stepped cavity and dynamic pressure cavity will produce great dynamic pressure active force, promote the bearing capacity and the oil film rigidity of oil film greatly, simultaneously, the static pressure oil film can play the effect of homogenizing static-dynamic mixed oil film bearing foozle preferably, so can be promoted the overall performance of static-dynamic mixed oil film bearing greatly by the acting in conjunction of above-mentioned active and static pressure oil film melange effect.Each static pressure chamber, stepped cavity, dynamic pressure cavity are mutually 120 ° and offer, and are suitable for becoming varying load operation occasion.
Claims (3)
1. static-dynamic mixed oil film bearing, comprise oil-return groove (6), oil inlet hole (10), it is characterized in that: the bore area of static-dynamic mixed oil film bearing (1) offers three static pressure chambeies that are mutually 120 °, promptly go up static pressure chamber (5), preceding static pressure chamber (9) and static pressure chamber (13), back, pressure oil enters above-mentioned each static pressure chamber by oil inlet hole (10), pressure oil is by three axial oil-return grooves (6) oil return, offer three stepped cavity that are mutually 120 ° between above-mentioned static pressure chamber and the axial oil-return groove (6), oil sealing surface between stepped cavity and the axial oil-return groove (6) has formed three dynamic pressure cavity, promptly goes up dynamic pressure cavity (3), preceding dynamic pressure cavity (7) and following dynamic pressure cavity (11).
2. static-dynamic mixed oil film bearing according to claim 1, it is characterized in that: stepped cavity is made up of last stepped cavity (4), preceding stepped cavity (8) and back stepped cavity (12), the sectional shape of stepped cavity is a rectangle, and the matching gap of the degree of depth of stepped cavity and main shaft (2) and static-dynamic mixed oil film bearing (1) is got the same order of magnitude.
3. static-dynamic mixed oil film bearing according to claim 1 is characterized in that: the arc length in static pressure chamber is 1～1.2 times of dynamic pressure cavity arc length, and the arc length of stepped cavity is 1.8～2.2 times of dynamic pressure cavity arc length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101041099A CN101576121B (en) | 2009-06-17 | 2009-06-17 | Static-dynamic mixed oil film bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101041099A CN101576121B (en) | 2009-06-17 | 2009-06-17 | Static-dynamic mixed oil film bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101576121A CN101576121A (en) | 2009-11-11 |
| CN101576121B true CN101576121B (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101041099A Expired - Fee Related CN101576121B (en) | 2009-06-17 | 2009-06-17 | Static-dynamic mixed oil film bearing |
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| Country | Link |
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| CN (1) | CN101576121B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865211A (en) * | 2010-06-08 | 2010-10-20 | 潘旭华 | Hybrid bearing |
| CN102570692A (en) * | 2010-12-15 | 2012-07-11 | 江苏华雕机械有限公司 | Electric spindle supported by multivariant bearing |
| CN102537044B (en) * | 2010-12-24 | 2013-12-25 | 大连冶金轴承股份有限公司 | Dual-angle supporting oil film bearing of wind-power spindle |
| CN102588437B (en) * | 2012-02-21 | 2015-04-08 | 山东博特精工股份有限公司 | Excircle cavity opening type dynamic-static pressure main shaft unit |
| CN103498911A (en) * | 2013-10-24 | 2014-01-08 | 中国船舶重工集团公司第七�三研究所 | Bearing with special oil lobe structure |
| CN103939472B (en) * | 2014-03-27 | 2017-04-26 | 西安交通大学 | Sliding bearing of double-screw compressor |
| ITUB20159300A1 (en) * | 2015-12-23 | 2017-06-23 | Mario Baldaccini Meccanica Di Prec | BEARING FOR SPINDLE SUPPORT. |
| CN105526172B (en) * | 2015-12-30 | 2017-12-12 | 好米动力设备有限公司 | Single screw compressor with proper lubrication |
| CN105485168B (en) * | 2016-01-07 | 2017-12-29 | 燕山大学 | A kind of radial support pads texture surface friction pair |
| CN106826545B (en) * | 2017-01-25 | 2019-04-30 | 宋志勇 | Grinding head device for dynamic and static pressure shafting |
| CN106763190B (en) * | 2017-02-16 | 2018-12-11 | 西安建筑科技大学 | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure |
| CN108105257B (en) * | 2017-12-12 | 2019-05-28 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication transverse bearing equipped with circumferential communication groove |
| CN110107595B (en) * | 2019-04-11 | 2020-07-28 | 西安理工大学 | Dynamic and static pressure thrust bearing jointly borne by tilting pad and static pressure oil cavity |
| CN110107596A (en) * | 2019-05-06 | 2019-08-09 | 格力电器（合肥）有限公司 | A kind of sliding bearing, motor and compressor including the sliding bearing |
| CN113027921B (en) * | 2021-02-09 | 2022-10-11 | 太原重工股份有限公司 | Method and device for acquiring pressure distribution of oil film of static and dynamic pressure bearing |
| CN114321180A (en) * | 2021-12-31 | 2022-04-12 | 连云港斯克斯机器人科技有限公司 | Three-direction bearing hybrid bearing based on steepest descent wedge-shaped groove |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461739U (en) * | 2009-06-17 | 2010-05-12 | 重庆大学 | Dynamic-static hybrid oil film bearing |
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- 2009-06-17 CN CN2009101041099A patent/CN101576121B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461739U (en) * | 2009-06-17 | 2010-05-12 | 重庆大学 | Dynamic-static hybrid oil film bearing |
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| CN101576121A (en) | 2009-11-11 |
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Owner name: CHONGQING SIMULATION MECHANICAL ENGINEERING TECHNO Free format text: FORMER OWNER: CHONGQING UNIVERSITY Effective date: 20150714 |
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Effective date of registration: 20150714 Address after: Chunhui road 400048 Chongqing Dadukou Cypress Street Road No. 101 Building 1 3-7 Patentee after: Chongqing Simon Mechanical Engineering Technology Service Co., Ltd. Address before: 400044 Shapingba street, Shapingba District, Chongqing, No. 174 Patentee before: Chongqing University |
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