CN201763815U - No-drift high-accuracy opened static-pressure guide rail - Google Patents
No-drift high-accuracy opened static-pressure guide rail Download PDFInfo
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- CN201763815U CN201763815U CN2010202770770U CN201020277077U CN201763815U CN 201763815 U CN201763815 U CN 201763815U CN 2010202770770 U CN2010202770770 U CN 2010202770770U CN 201020277077 U CN201020277077 U CN 201020277077U CN 201763815 U CN201763815 U CN 201763815U
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- guide rail
- oil
- static pressure
- pressure
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Abstract
The utility model relates to a no-drift high-accuracy opened static-pressure guide rail, comprising a floating guide rail and a supporting guide rail, wherein the floating guide rail is placed on the supporting guide rail; the contact surface of the floating guide rail and the supporting guide rail is provided with a static-pressure oil cavity and a negative-pressure cavity; an oil supply system is communicated with the static-pressure oil cavity by a throttler; the negative-pressure cavity is communicated with a vacuum pump which is communicated with the oil supply system by an oil-gas separating device; and an oil-return groove communicated with the oil supply system is arranged between the floating guide rail and the supporting guide rail. The no-drift high-accuracy opened static pressure guide rail is simple and available, improves the rigidity of an oil film, can adjust the thickness of the oil film by the vacuum pump, and can be widely applied to opened static pressure guide rails with various structure types, especially medium-sized and small-sized low-load precise and ultra-precise machine tool guide rails which are seriously limited by drift problems before, such as precise rolling grinders, precise planing machines and the like.
Description
Technical field
The utility model belongs to the hydrostatic slideway field, particularly relates to a kind of open type static pressure guide rail.
Background technique
Hydrostatic slideway has a wide range of applications at mechanical field because of it has long, precision advantages of higher of life-span.It is force-closed that open type static pressure guide rail belongs to, promptly can only rely on the deadweight or the load of movement parts to keep movement parts not separate with supporting member, it has oil pocket on a direction of guide rail, and can only level or the position than small inclination on place, its rigidity depends on the size of oil slick thickness, and oil slick thickness is big more, and rigidity is poor more, oil slick thickness is more little, and rigidity is good more.This hydrostatic slideway is simple in structure, makes and the adjustment aspect.Be mainly used in the supporting, the heavy load of low-speed motion, sometimes the planer and the grinding machine that also are used for quick back and forth movement, but at this moment straight-line inertial force must be limited in than within the little scope of centrifugal motion, otherwise " drift " or buoyance lift will occur, thereby have a strong impact on its kinematic accuracy.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of rift-free high accurate open type static pressure guide rail, and is big with oil slick thickness in the solution prior art, the defective of poor rigidity.
A kind of rift-free high accurate open type static pressure guide rail comprises floating guide rail and supporting guide, and described floating guide rail is placed on the described supporting guide; Have static pressure oil pocket and negative cavity on the surface of contact of described floating guide rail and supporting guide; Described static pressure oil pocket is communicated with oil supply system by flow controller; Described negative cavity and vacuum pump are communicated with; Described vacuum pump is communicated with described oil supply system by gas and oil separating plant; Have the oil-return groove that communicates with described oil supply system between described floating guide rail and the supporting guide.
Described oil-return groove is formed by opening at the cross scavenging groove on described floating guide rail surface and vertical oil-return groove of opening on described supporting guide.
Described static pressure oil pocket and negative cavity are arranged one to one at interval on the surface of described floating guide rail.
Described vacuum pump is the jet type vacuum pump.
Described floating guide rail is " V " shape guide rail, and described static pressure oil pocket and negative cavity be symmetric arrangement on two planes of " V ".
Beneficial effect
The utility model is on the guide rail surface of contact, part beyond the effective bearing area is offered negative cavity, in the time of the work of guide rail oil supply system, by vacuum pump negative cavity is vacuumized, utilize vacuum to produce suction and react on working oil membrane between slideway, make oil slick thickness reduce and improve oil film rigidity, prevent that guide rail from " drift " occurring and overturning phenomenon thereby reach, simple possible, improved oil film rigidity, and can regulate oil slick thickness by vacuum pump, when oil pump quits work, still can rely on the work of vacuum pump, make guide rail be in stable locking state, fully improved the rigidity of static pressure oil film and the running precision of guide rail, can be widely used among the open type static pressure guide rail of various structure types, especially seriously be subjected to the accurate and ultra-precision machine tool guide rail of middle-size and small-size low load of " drift " problem restriction before, as the finishing roller grinding machine, sophisticated planer etc.
Description of drawings
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 2, a kind of rift-free high accurate open type static pressure guide rail, the floating guide rail 1 and the supporting guide 2 that comprise plane shape, floating guide rail 1 is placed on the supporting guide 2, have static pressure oil pocket 6 and circular negative cavity 7 on the surface of contact of described floating guide rail 1 and supporting guide 2, negative cavity 7 is opened between two static pressure oil pockets 6, for guarantee oil supply system 9 stable flow is provided, adopt the constant-pressure type oil supply system and be communicated with static pressure oil pocket 6 by flow controller 5, negative cavity 7 and jet type vacuum pump 4 are communicated with, vacuum pump is communicated with oil supply system 9 by gas and oil separating plant, have the oil-return groove that communicates with oil supply system 9 between described floating guide rail 1 and the supporting guide 2, described oil-return groove is formed by opening at the cross scavenging groove 8 on floating guide rail 1 surface and vertical oil-return groove 3 of opening on supporting guide 2.
During oil supply system 9 work, with the oil pocket 4 of lubricant oil on flow controller 5 injection slideway, the formed buoyancy of lubricant oil in the oil pocket floats floating guide rail 1 at this moment, between floating guide rail 1 and support rails 2, form certain thickness liquid oil film, and the vacuum pumps at oil, air circuit outlet end 6 places are also worked simultaneously, and it vacuumizes negative cavity 7, thus negative cavity 7 form a certain size suction, impel the oil slick thickness between slideway to reduce, and then improve oil film rigidity.When buoyancy and suction make a concerted effort just in time with the load that adds (floating guide rail 1 deadweight and operating load) balance the time, system keeps balance, oil slick thickness also tends towards stability and has higher rigidity.In addition, even when oil pump quits work, the suction in the negative cavity can make structure be in stable locking state, and therefore, this supporting structure has two-way rigidity, belongs to a kind of desirable supporting means.
Working principle as shown in Figure 1, 2, it is that the lubricating oil of Ps is that the flow controller 5 of d flows in the static pressure oil pockets 6 through diameter that oil supply system 9 produces pressure, pressure drop this moment is P
1The buoyancy F that in oil pocket, produces of liquid
1Floating guide rail is supported, flow out from oil sealing surface then.Specify with right side oil pocket in scheming below: the oil sealing surface of most of liquid around along the S2 zone outwards flows out, and cross scavenging groove 8 and the vertical oil-return groove 3 on the supporting guide 2 by floating guide rail 1 surface flow back in the fuel tank of oil supply system 9 again; In addition, vacuum pump vacuumizes negative cavity 7 and makes S3 zone pressure reduce, thereby liquid is when flowing through cross scavenging groove 8, understanding some liquid overflows from this and flows to negative cavity 7, and be pumped down in vacuum pump 4 loops together with air in the chamber, after separating through gas and oil separating plant again, flow back to fuel tank.
Therefore, pressure is P
1Liquid form zone of positive pressure in S1 and S2 zone, the buoyancy F that positive press liquid produces
1Floating guide rail is floated, make it have bearing capacity; And because vacuum produces suction F
2So, form negative pressuren zone in the S3 zone.Simultaneously, malleation increases oil slick thickness, and negative pressure reduces oil slick thickness, promptly as zone of positive pressure F
1With negative pressuren zone F
2Make a concerted effort just in time with the load that adds (floating guide rail deadweight and operating load) balance the time, system promptly keeps balance, oil slick thickness h also tends towards stability and has higher rigidity.
1) technical problem that will solve
(1) correlation technique parameter and relation derivation thereof
After adopting vacuum to inhale floating device, when system was in the balance and stability state, the value of the buoyancy F1 that the oil pocket oil film produces was wanted simultaneously to determine according to the suction F2 that the bearing load F3 of oil film institute and negative cavity produce.Promptly
F
1＝F
2+F
3
The suction F2 that negative cavity produces is
F
2＝n
2(p
0-p
2)A
n
The buoyancy that the oil pocket oil film produces is
F
1＝n
1p
1A
v
By the above three formulas oil film pressure that is easy to get out be
In the formula, n
1---the oil pocket number;
n
2---the negative cavity number;
p
0---external atmosphere pressure;
p
1---the oil pocket oil film pressure;
p
2---negative cavity air pressure;
A
v---single oil pocket effective bearing area;
A
n---single negative cavity section area;
F
3---oil film institute bearing load (floating guide rail deadweight and load sum)
Therefore when design, should come progressively to determine best throttling according to the P1 that following formula draws than β and oil pump feed pressure P s, thereby select suitable flow controller and oil supply system.
(2) keep the entire system stability under loading
Embodiment 2
The 2nd embodiment of a kind of rift-free high accurate open type static pressure guide rail of the utility model and the 1st embodiment's difference are that floating guide rail 1 and supporting guide 2 are V " shape " guide rail, static pressure oil pocket 6 and negative cavity 7 are arranged symmetrically on two planes of " V " shape, negative cavity 7 is square, and described oil-return groove is formed by opening at vertical oil-return groove 8 on floating guide rail 1 surface and the cross scavenging groove of opening on supporting guide 23.
Claims (5)
1. a rift-free high accurate open type static pressure guide rail comprises floating guide rail (1) and supporting guide (2), it is characterized in that: described floating guide rail (1) is placed on the described supporting guide (2); Have static pressure oil pocket (6) and negative cavity (7) on the surface of contact of described floating guide rail (1) and supporting guide (2); Described static pressure oil pocket (6) is communicated with oil supply system (9) by flow controller (5); Described negative cavity (7) and vacuum pump (4) are communicated with; Described vacuum pump (4) is communicated with described oil supply system (9) by gas and oil separating plant; Have the oil-return groove that communicates with described oil supply system (9) between described floating guide rail (1) and the supporting guide (2).
2. rift-free high accurate open type static pressure guide rail as claimed in claim 1 is characterized in that: described oil-return groove is formed by opening at the cross scavenging groove (8) on described floating guide rail (1) surface and vertical oil-return groove (3) of opening on described supporting guide (2).
3. rift-free high accurate open type static pressure guide rail as claimed in claim 1 or 2 is characterized in that: described static pressure oil pocket (6) and negative cavity (7) are arranged one to one at interval on the surface of described floating guide rail (1).
4. rift-free high accurate open type static pressure guide rail as claimed in claim 3 is characterized in that: described vacuum pump (4) is the jet type vacuum pump.
5. rift-free high accurate open type static pressure guide rail as claimed in claim 4 is characterized in that: described floating guide rail (1) is " V " shape guide rail, and described static pressure oil pocket (6) and negative cavity (7) be symmetric arrangement on two planes of " V ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202770770U CN201763815U (en) | 2010-07-30 | 2010-07-30 | No-drift high-accuracy opened static-pressure guide rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202770770U CN201763815U (en) | 2010-07-30 | 2010-07-30 | No-drift high-accuracy opened static-pressure guide rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201763815U true CN201763815U (en) | 2011-03-16 |
Family
ID=43716421
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202770770U Expired - Fee Related CN201763815U (en) | 2010-07-30 | 2010-07-30 | No-drift high-accuracy opened static-pressure guide rail |
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| CN (1) | CN201763815U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806633A (en) * | 2015-04-13 | 2015-07-29 | 河南科技大学 | Split type sliding device for static-pressure sliding bearing |
| CN106584183A (en) * | 2015-10-14 | 2017-04-26 | 财团法人工业技术研究院 | Feeding module |
| CN110645272A (en) * | 2019-09-19 | 2020-01-03 | 上海卫星工程研究所 | Aerostatic bearing based on additional mass motion driven vibration energy consumption |
| CN112096739A (en) * | 2020-08-05 | 2020-12-18 | 佛山市华道超精科技有限公司 | Air-floatation guide rail type switchable rigid-flexible coupling motion platform |
-
2010
- 2010-07-30 CN CN2010202770770U patent/CN201763815U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806633A (en) * | 2015-04-13 | 2015-07-29 | 河南科技大学 | Split type sliding device for static-pressure sliding bearing |
| CN104806633B (en) * | 2015-04-13 | 2017-12-15 | 河南科技大学 | A kind of split type static-pressure sliding bearing slide device |
| CN106584183A (en) * | 2015-10-14 | 2017-04-26 | 财团法人工业技术研究院 | Feeding module |
| CN110645272A (en) * | 2019-09-19 | 2020-01-03 | 上海卫星工程研究所 | Aerostatic bearing based on additional mass motion driven vibration energy consumption |
| CN110645272B (en) * | 2019-09-19 | 2021-06-29 | 上海卫星工程研究所 | Aerostatic bearing based on additional mass motion driven vibration energy consumption |
| CN112096739A (en) * | 2020-08-05 | 2020-12-18 | 佛山市华道超精科技有限公司 | Air-floatation guide rail type switchable rigid-flexible coupling motion platform |
| CN112096739B (en) * | 2020-08-05 | 2021-12-21 | 佛山市华道超精科技有限公司 | Air-floatation guide rail type switchable rigid-flexible coupling motion platform |
| WO2022028260A1 (en) * | 2020-08-05 | 2022-02-10 | 佛山市华道超精科技有限公司 | Air-floating guide rail type switchable rigid-flexible coupling motion platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20130730 |