CN2030674U - Mixing bearing with dynamic and static pressure - Google Patents
Mixing bearing with dynamic and static pressure Download PDFInfo
- Publication number
- CN2030674U CN2030674U CN 88205411 CN88205411U CN2030674U CN 2030674 U CN2030674 U CN 2030674U CN 88205411 CN88205411 CN 88205411 CN 88205411 U CN88205411 U CN 88205411U CN 2030674 U CN2030674 U CN 2030674U
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- CN
- China
- Prior art keywords
- oil
- oil supply
- supply hole
- feedback
- bearing
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model relates to an internal throttling radial oil supply mixing bearing with dynamic and static pressure. The model changes the anchor ring axial oil supply of an existing mixing bearing with dynamic and static pressure to the radial oil supply of an oil supply elongated slot and an internal oil path feed back structure is added. The utility model omits a circulation slot or a circulation hole. In this way, the utility model has the advantages of large bearing capacity, strong rigidity, wide application area, stable service behavior, energy saving, etc. The utility model is widely used for the bearing of the chief axis in a machine tool or mechanical equipment.
Description
A kind of inner throttling is the fuel feeding hybrid bearing radially, belongs to the fluid lubricated bearing category, is applicable to the supporting of accurate running bearing, is particularly useful for the supporting of main shaft on the precision machine tool.
What used in the past fluid lubricated bearing adopted mostly is hydrostatic bearing, but because the bearing capacity of hydrostatic bearing is poor, and rigidity is little, can not satisfy the required precision of the axle that runs up.At present, developed both at home and abroad and used hybrid bearing, a kind of as disclosing among the Chinese patent CN85203674 " cellular type ring restrictor line chamber is adjustable interactive static pressure combined bearing ", but, above-mentioned model utility is owing to adopted the cellular type fuel feeding of 1-3 millimeter bore, the inner throttling in shallow chamber, three oil pockets around can both oil return, so its throttle effect is undesirable; After adopting three oil-return grooves, make the loaded area of bearing reduce, bearing capacity is affected relatively, thereby the static pressure poor effect that should invent.When running up, cause the fuel feeding deficiency easily in addition, the also unfavorable defective of dynamic pressure effect, and after being provided with three oil-return grooves, make fuel delivery big, energy consumption increases.Above-mentioned reason makes this invention in the big equipment of speed and load change or low speed, can not use in the heave-load device.
The purpose of this utility model is exactly in order to overcome the deficiency of above-mentioned existence, to provide a kind of bearing capacity big, and rigidity is strong, and the active and static pressure effect is good, and application approach is wide and have a hybrid bearing of energy-saving effect.
The utility model is to realize above-mentioned purpose by following technical solution, its concrete scheme is: be manufactured with 3～8 shallow oil pockets at a bearing support internal surface, each shallow oil pocket respectively has one the two neither oil supply hole on same diametric plane in its sense of rotation upstream, and is that the center has a fuel feeding elongated slot vertically with this oil supply hole; At the outer round surface of bearing support, be that the center has a feedback annular groove with each oil supply hole, simultaneously in the feedback annular groove corresponding to another semicircle of oil supply hole on axisymmetric depart from a central angle θ
2The place has a feedback oilhole, is the center with the feedback oilhole, has a feedback elongated slot on the bearing support internal surface, departs from feedback elongated slot central angle θ with the sense of rotation upstream
3Offer an oil-feed elongated slot, axially neutral position is provided with an oil inlet hole on the oil-feed elongated slot, is communicated with each oil inlet hole with an oil-feed annular groove on the bearing support outer round surface.
Accompanying drawing has been described an embodiment of the present utility model.
Fig. 1 is an internal structure sectional view of the present utility model.
Fig. 2 is the axial sectional view of oil inlet hole of the present utility model and groove.
Fig. 3 is the following oil circuit schematic representation that upwards feeds back of model utility.
Below in conjunction with accompanying drawing the utility model is elaborated, among Fig. 1, Fig. 2, bearing support 1 length is L, and its internal surface is equipped with four shallow oil pockets 2, depth S=0.1mm, and wide is central angle θ
1=50 °, limit with the sense of rotation upstream is that the center has a fuel feeding elongated slot 3 thereon, and on fuel feeding elongated slot 3 axial distance axle central point 1/10L place have 4, four oil supply holes of an oil supply hole in twos axial spacing respectively be 1/10L, and be symmetry with the axial centre point.With the oil supply hole 4 corresponding feedback oilholes 5 that have on the same diametric plane of another semicircle of bearing support 1 internal surface, itself and oil supply hole 4 axisymmetric point depart from a central angle θ
2=12.5 °, the feedback annular groove 6 of two Kong Youyi bearing support outer round surface is communicated with; With feedback oilhole 5 is that the center has a feedback elongated slot 7 vertically, distance feedback elongated slot 7 one central angle θ
3=12.5 ° have equidirectional oil-feed elongated slot 8, wherein have oil inlet hole 9 in axial neutral position.Having oil-feed annular groove 10 on the outer round surface of bearing support 1 is communicated with 4 uniform oil inlet holes 9.
When the bearing support internal surface is equipped with the shallow oil pocket 2 of even number, its oil supply hole 4 is uniform with the axle central point, and also distance between shafts is identical at interval in twos, the spacing of two wherein adjacent with axle central point oil supply holes 4, be 2 times of other adjacent oil supply hole distance between shafts, other structure is same as described above.
When bearing support 1 internal surface is equipped with the shallow oil pocket 2 of odd number, many one of the comparable another side of one side fuel feeding hole count of axle central point, other structure is as hereinbefore.
Among Fig. 3, lubricant oil enters into oil inlet hole 9 from oil-feed annular groove 10, enters shallow oil pocket 2 by oil-feed elongated slot 8 by inner throttling and incorporates fuel feeding elongated slot 3 into, carries out radially fuel feeding; Oil also can be entered in the feedback elongated slot 7 by the throttling between axle and bearing ring wall by oil-feed elongated slot 8 on the other hand, when axially moving down, lower space reduces pressure and increases, oil goes out by feedback annular groove 6 to enter into feedback oilhole 5 on the symmetrical circumference from oil supply hole 4, by throttling, pressure reduces, and reaches equilibrium of forces.
Go up downwards for other three kinds, the left-hand right side, dextrad left side feedback oil circuit is in like manner.
It is big to the utlity model has bearing capacity, and rigidity is strong, applied range, stable work in work and can reach the characteristics such as energy-saving effect. Can generally be applicable to lathe, the supporting of main shaft in the plant equipment.
Claims (2)
1, a kind of inner throttling fuel feeding hybrid bearing radially, it is made up of a bearing support 1, its internal surface is manufactured with 3～8 shallow oil pockets 2, each shallow oil pocket respectively has one the two neither oil supply hole on same diametric plane 4 in its sense of rotation upstream, it is characterized in that having in the described shallow oil pocket an axial fuel feeding elongated slot 3 to be communicated with oil supply hole 4; At the outer round surface of bearing support 1, be that the center has a feedback annular groove 6 with each oil supply hole 4, in feedback annular groove 6, depart from a central angle θ simultaneously corresponding to the axisymmetric point on another semicircle of oil supply hole
2The place has a feedback oilhole 5, is the center with feedback oilhole 5, has a feedback elongated slot 7 on the bearing support internal surface, departs from feedback elongated slot 7 central angle θ in bearing support sense of rotation upstream
3The place offers an oil-feed elongated slot 8, and central point is provided with an oil inlet hole 9 on the oil-feed elongated slot 8, with each oil inlet hole 9 of oil-feed annular groove 10 connection on bearing support 1 outer surface.
2, hybrid bearing as claimed in claim 1, it is characterized in that described oil supply hole 4, also distance between shafts is identical at interval in twos, the spacing of two wherein adjacent oil supply holes 4 with the axle central point, be 2 times of other adjacent oil supply hole distance between shafts, when oil supply hole is even number, uniform with the axle central point, when oil supply hole is odd number, many one of the comparable another side of one side fuel feeding hole count of axle central point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88205411 CN2030674U (en) | 1988-05-09 | 1988-05-09 | Mixing bearing with dynamic and static pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88205411 CN2030674U (en) | 1988-05-09 | 1988-05-09 | Mixing bearing with dynamic and static pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2030674U true CN2030674U (en) | 1989-01-11 |
Family
ID=4839812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88205411 Withdrawn CN2030674U (en) | 1988-05-09 | 1988-05-09 | Mixing bearing with dynamic and static pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2030674U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765718B (en) * | 2007-07-31 | 2012-08-08 | Ntn株式会社 | Fluid dynamic bearing device and its assembling method |
| CN105673689A (en) * | 2016-03-22 | 2016-06-15 | 宁波圣圭精工科技有限公司 | Hybrid bearing and main shaft provided with hybrid bearing |
| CN106382302A (en) * | 2016-11-24 | 2017-02-08 | 天津职业技术师范大学 | Static pressure bearing capable of realizing online pressure fault detection and rapid maintenance |
| CN112743351A (en) * | 2020-12-24 | 2021-05-04 | 杭州铁泰自动化科技有限公司 | High-precision dynamic and static pressure main shaft system |
| CN114810829A (en) * | 2022-06-27 | 2022-07-29 | 云南省机械研究设计院有限公司 | Bidirectional large dynamic range hybrid bearing |
-
1988
- 1988-05-09 CN CN 88205411 patent/CN2030674U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765718B (en) * | 2007-07-31 | 2012-08-08 | Ntn株式会社 | Fluid dynamic bearing device and its assembling method |
| CN105673689A (en) * | 2016-03-22 | 2016-06-15 | 宁波圣圭精工科技有限公司 | Hybrid bearing and main shaft provided with hybrid bearing |
| CN105673689B (en) * | 2016-03-22 | 2018-07-10 | 宁波圣圭精工科技有限公司 | Dynamic and hydrostatic bearing and the main shaft for being equipped with dynamic and hydrostatic bearing |
| CN106382302A (en) * | 2016-11-24 | 2017-02-08 | 天津职业技术师范大学 | Static pressure bearing capable of realizing online pressure fault detection and rapid maintenance |
| CN106382302B (en) * | 2016-11-24 | 2019-07-12 | 天津职业技术师范大学 | It is a kind of can on-line checking pressure fault and rapid-maintenance hydrostatic bearing |
| CN112743351A (en) * | 2020-12-24 | 2021-05-04 | 杭州铁泰自动化科技有限公司 | High-precision dynamic and static pressure main shaft system |
| CN114810829A (en) * | 2022-06-27 | 2022-07-29 | 云南省机械研究设计院有限公司 | Bidirectional large dynamic range hybrid bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |