CN201461739U - Dynamic-static hybrid oil film bearing - Google Patents
Dynamic-static hybrid oil film bearing Download PDFInfo
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- CN201461739U CN201461739U CN2009201276901U CN200920127690U CN201461739U CN 201461739 U CN201461739 U CN 201461739U CN 2009201276901 U CN2009201276901 U CN 2009201276901U CN 200920127690 U CN200920127690 U CN 200920127690U CN 201461739 U CN201461739 U CN 201461739U
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Abstract
The utility model relates to a dynamic-static hybrid oil film bearing, which comprises a dynamic-static hybrid oil film bearing 1, a main shaft 2, return chutes 6 and an oil inlet hole 10. The utility model is characterized in that the inner hole surface of the dynamic-static hybrid oil film bearing 1 is provided with three static pressure cavities which form 120 degrees mutually, pressurized oil enters each static pressure cavity through the oil inlet hole 10, the pressurized oil returns through the three axial return chutes 6, three step cavities which form 120 degrees mutually are arranged between the static pressure cavities and the axial return chutes 6, and oil sealing surfaces between the step cavities and the axial return chutes 6 form three dynamic pressure cavities. The utility model solves the contact problem of a main shaft and the dynamic-static hybrid oil film bearing when the main shaft starts, greatly improves the dynamic pressure effect of the dynamic-static oil film bearing under the running working condition, consequently obtains ideal dynamic-static pressure effect, obviously improves the rigidity of the oil film, homogenizes errors and greatly improves the rotation precision of a main shaft system.
Description
Technical field:
The utility model 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.
The model utility content
The purpose of this utility model is the dynamic and hydrostatic bearing that design in order to overcome above-mentioned the deficiencies in the prior art a kind of is applicable at a high speed, 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.
The static-dynamic mixed oil film bearing that the utility model is related, 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 utility model 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 utility model;
Fig. 2 is a hybrid hydrodynamic oil film journal bearing structural representation of the present utility model;
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
The technical solution of the utility model is further specified as follows below in conjunction with drawings and Examples:
Structure of the present utility model 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 high-speed working condition, 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 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 (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 oil pocket 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, the degree of depth of stepped cavity and main shaft (2) and static-dynamic mixed oil film. the matching gap of 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 |
|---|---|---|---|
| CN2009201276901U CN201461739U (en) | 2009-06-17 | 2009-06-17 | Dynamic-static hybrid oil film bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201276901U CN201461739U (en) | 2009-06-17 | 2009-06-17 | Dynamic-static hybrid oil film bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461739U true CN201461739U (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201276901U Expired - Lifetime CN201461739U (en) | 2009-06-17 | 2009-06-17 | Dynamic-static hybrid oil film bearing |
Country Status (1)
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| CN (1) | CN201461739U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576121B (en) * | 2009-06-17 | 2011-03-30 | 重庆大学 | Static-dynamic mixed oil film bearing |
| CN102274859A (en) * | 2011-05-06 | 2011-12-14 | 郭溪泉 | Oil film bearing bush for plate and strip rolling mill |
| CN103899644A (en) * | 2014-03-12 | 2014-07-02 | 哈尔滨工程大学 | Stepped compound throttling gas floating guide rail |
| CN108105257A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication journal bearing for being equipped with circumferential communication groove |
| CN110094423A (en) * | 2019-04-25 | 2019-08-06 | 西安交通大学 | A kind of pressure applied to gear pump automatically supplies static-pressure sliding bearing |
| CN110094422A (en) * | 2019-04-25 | 2019-08-06 | 西安交通大学 | A kind of pressure applied to gear pump automatically supplies hybrid sliding bearing |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
-
2009
- 2009-06-17 CN CN2009201276901U patent/CN201461739U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576121B (en) * | 2009-06-17 | 2011-03-30 | 重庆大学 | Static-dynamic mixed oil film bearing |
| CN102274859A (en) * | 2011-05-06 | 2011-12-14 | 郭溪泉 | Oil film bearing bush for plate and strip rolling mill |
| CN102274859B (en) * | 2011-05-06 | 2013-09-04 | 郭溪泉 | Oil film bearing bush for plate and strip rolling mill |
| CN103899644A (en) * | 2014-03-12 | 2014-07-02 | 哈尔滨工程大学 | Stepped compound throttling gas floating guide rail |
| CN108105257A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of H-shaped shallow cavity hybrid water lubrication journal bearing for being equipped with circumferential communication groove |
| 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 |
| CN110094423A (en) * | 2019-04-25 | 2019-08-06 | 西安交通大学 | A kind of pressure applied to gear pump automatically supplies static-pressure sliding bearing |
| CN110094422A (en) * | 2019-04-25 | 2019-08-06 | 西安交通大学 | A kind of pressure applied to gear pump automatically supplies hybrid sliding bearing |
| CN114623160A (en) * | 2022-03-25 | 2022-06-14 | 西安热工研究院有限公司 | Hybrid bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100512 Effective date of abandoning: 20090617 |