CN104500568A - Novel linear hydraulic bearing - Google Patents
Novel linear hydraulic bearing Download PDFInfo
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- CN104500568A CN104500568A CN201410813719.7A CN201410813719A CN104500568A CN 104500568 A CN104500568 A CN 104500568A CN 201410813719 A CN201410813719 A CN 201410813719A CN 104500568 A CN104500568 A CN 104500568A
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- pressure
- bearing
- linear hydraulic
- oil
- stationary axle
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Abstract
The invention provides a novel linear hydraulic bearing. The novel linear hydraulic bearing comprises a fixed shaft, wherein the fixed shaft is externally provided with a movable shaft sleeve; the inner surface, connected with the fixed shaft, of the movable shaft sleeve is provided with a plurality of a pressure-bearing chambers capable of bearing high-pressure oil, and the bottom and top of the inner surface of the movable shaft sleeve are respectively provided with a high-pressure oil seal; a pressure relieving groove is arranged between the high-pressure oil seal and each pressure-bearing chamber, an oil film sealing tape adhered to the fixed shaft is arranged between the high-pressure oil seal and each pressure relieving groove, and a clearance between the fixed shaft and the movable shaft sleeve is filled with high-pressure oil; a high-pressure oil film communicated with each pressure-bearing chamber, the oil film sealing tape and the pressure relieving grooves is formed, a closed-loop oil system with high-pressure bearing, high-pressure seal and pressure relief oil return capabilities is formed by virtue of the pressure-bearing chambers, the oil film sealing tape, the pressure relieving grooves and the high-pressure oil film, and the movement frequency of the closed loop oil system can be up to 2-2000hz.
Description
Technical field
The present invention relates to a kind of fluid bearing, particularly relate to that a kind of rigidity is large, precision is high, the novel linear fluid bearing of long service life.
Background technique
Along with aerospace industry, the development of high precision machine tool, the high-precision fluid bearing of high capacity is crucial execution components and parts, for many years China relies on import to be applied in military project, space flight, on high precision machine tool, and the data of the price of costliness and relevant key annoying the progress of China's cause, a small amount of lubricant oil is only carried between common fluid bearing, play the lubrication in running, but this bearing is in running up, cannot the lateral force in load axle center, easy damage, because its precision and carrying reason can not be satisfied the demand, rigidity is large, the exploitation of the linear hydraulic bearing that precision is high is very necessary.
Summary of the invention
The problem to be solved in the present invention is to provide that a kind of rigidity is large, precision is high, the linear hydraulic bearing of long service life.
For solving the problems of the technologies described above, the technical solution used in the present invention is: comprise stationary axle, movable axis cover is provided with outside described stationary axle, the internal surface that described movable axle sleeve is connected with described stationary axle is provided with the pressure-bearing room of some carrying high pressure oils, top and the bottom of described movable axle sleeve internal surface are equipped with High-pressure oil sealing, be provided with pressure relief groove between described High-pressure oil sealing and pressure-bearing room, between described High-pressure oil sealing and pressure relief groove, be provided with the oil film seal band of fitting with stationary axle; The gap of described stationary axle and movable axle sleeve is covered with high pressure oil, forms the high pressure oil film being communicated with each pressure-bearing room, oil film seal band and pressure relief groove; Outside gas pressure relief slot, High-pressure oil sealing is set, for preventing low pressure oil excessive.
Described in one of them, pressure-bearing outdoor is provided with filler opening, described filler opening connection activity sleeve outer surface;
Unloading port is provided with, described unloading port connection activity sleeve outer surface outside pressure relief groove described in one of them.
Preferably, the cross section of described pressure-bearing room is semi-circular, rectangle, I shape or cross.
Further, described pressure relief groove has two, is symmetrical arranged.
Further, described stationary axle and movable axis put and are equipped with mounting hole.
Preferably, described stationary axle surface spraying molybdenum coating or molybdenum alloy coating.
Preferred, described filler opening, unloading port are throttle orifice, and inwall is shape of threads.
The high pressure oil that this linear hydraulic bearing passes into is 21MPa, is full of and forms high pressure oil film in the gap of each pressure-bearing room and stationary axle and movable axle sleeve, can better spring bearing.
Beneficial effect of the present invention is: the closed loop oil system being formed high pressure carrying, high pressure sealing, pressure release oil return by pressure-bearing room, oil film seal band, pressure relief groove, high pressure oil film, and its mesohigh ensure that the rigidity of bearing, precision and life-span.Linear hydraulic bearing can do at a high speed up and down or horizontal motion, and frequency can reach 2-2000hz, and in running up, embodies constant thermal expansion coefficient, constant power factor, constant precision.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
In figure:
1, movable axle sleeve; 2, stationary axle; 3, filler opening; 4, pressure-bearing room; 5, pressure relief groove; 6, unloading port; 7, High-pressure oil sealing; 8, oil film seal band.
Embodiment
Embodiment 1
Novel linear fluid bearing, comprise stationary axle 2, be provided with movable axis cover 1 outside stationary axle 2, the internal surface that movable axle sleeve 1 is connected with stationary axle 2 is provided with the pressure-bearing room 4 of some carrying high pressure oils, top and the bottom of movable axle sleeve 1 internal surface are equipped with High-pressure oil sealing 7, for preventing low pressure oil excessive.Be provided with pressure relief groove 5 between High-pressure oil sealing 7 and pressure-bearing room 4, between High-pressure oil sealing 7 and pressure relief groove 5, be provided with the oil film seal band 8 of fitting with stationary axle 2; The gap of stationary axle 2 and movable axle sleeve 1 is covered with high pressure oil, forms the high pressure oil film being communicated with each pressure-bearing room 4, oil film seal band 8 and pressure relief groove 5; Filler opening 3 is provided with, filler opening 3 connection activity axle sleeve 1 outer surface outside one of them pressure-bearing room 4; Unloading port 6 is provided with, unloading port 6 connection activity axle sleeve 1 outer surface outside one of them pressure relief groove 5.Stationary axle 2 surface spraying molybdenum coating.In addition, filler opening 3, unloading port 6 are throttle orifice, and inwall is shape of threads.
In the present embodiment, the cross section of pressure-bearing room 4 is rectangular, has three; Pressure relief groove 5 has two.Stationary axle 2 and movable axle sleeve 1 are equipped with mounting hole.
The high pressure oil that this linear hydraulic bearing passes into is 21MPa, and high pressure oil sprays to each pressure-bearing room 4 by filler opening 3, after being sealed, forms the closed loop oil system of high pressure carrying, high pressure sealing, pressure release oil return by oil film seal band 8.Linear hydraulic bearing can do at a high speed up and down or horizontal motion, and frequency can reach 2-2000hz, and in running up, embodies constant thermal expansion coefficient, constant power factor, constant precision.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.
Claims (7)
1. novel linear fluid bearing, it is characterized in that: comprise stationary axle, movable axis cover is provided with outside described stationary axle, the internal surface that described movable axle sleeve is connected with described stationary axle is provided with the pressure-bearing room of some carrying high pressure oils, top and the bottom of described movable axle sleeve internal surface are equipped with High-pressure oil sealing, be provided with pressure relief groove between described High-pressure oil sealing and pressure-bearing room, between described High-pressure oil sealing and pressure relief groove, be provided with the oil film seal band of fitting with stationary axle; The gap of described stationary axle and movable axle sleeve is covered with high pressure oil, forms the high pressure oil film being communicated with each pressure-bearing room, oil film seal band and pressure relief groove;
Described in one of them, pressure-bearing outdoor is provided with filler opening, described filler opening connection activity sleeve outer surface;
Unloading port is provided with, described unloading port connection activity sleeve outer surface outside pressure relief groove described in one of them.
2. linear hydraulic bearing according to claim 1, is characterized in that: the cross section of described pressure-bearing room is semi-circular, rectangle, I shape or cross.
3. linear hydraulic bearing according to claim 1, is characterized in that: described pressure relief groove has two, is symmetrical arranged.
4. linear hydraulic bearing according to claim 1, is characterized in that: described stationary axle and movable axis put and be equipped with mounting hole.
5. linear hydraulic bearing according to claim 1, is characterized in that: described stationary axle surface spraying molybdenum coating or molybdenum alloy coating.
6. linear hydraulic bearing according to claim 1, is characterized in that: described filler opening, unloading port are throttle orifice, and inwall is shape of threads.
7. linear hydraulic bearing according to claim 1, is characterized in that: the pressure of described high pressure oil is 21MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813719.7A CN104500568A (en) | 2014-12-23 | 2014-12-23 | Novel linear hydraulic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813719.7A CN104500568A (en) | 2014-12-23 | 2014-12-23 | Novel linear hydraulic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104500568A true CN104500568A (en) | 2015-04-08 |
Family
ID=52942001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410813719.7A Pending CN104500568A (en) | 2014-12-23 | 2014-12-23 | Novel linear hydraulic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500568A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3640590A (en) * | 1968-08-13 | 1972-02-08 | Koning Maschf P | Means utilizing compressed air for confining a pressurized oil film between relatively movable bearing surfaces |
| JPS6110115A (en) * | 1985-05-22 | 1986-01-17 | Hitachi Ltd | Air-bearing type straight advance guide |
| US5391002A (en) * | 1991-04-25 | 1995-02-21 | Mannesmann Rexroth Gmbh | Hydrostatic radial pocket bearing for a servo cylinder |
| JP2002303323A (en) * | 2001-04-05 | 2002-10-18 | Nsk Ltd | Driving device |
| CN101975225A (en) * | 2010-09-29 | 2011-02-16 | 山东大学 | Static pressure sliding bearing with control oil chambers |
| CN204533207U (en) * | 2014-12-23 | 2015-08-05 | 天津尚吉液压设备有限公司 | Highi degree of accuracy linear hydraulic bearing |
-
2014
- 2014-12-23 CN CN201410813719.7A patent/CN104500568A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3640590A (en) * | 1968-08-13 | 1972-02-08 | Koning Maschf P | Means utilizing compressed air for confining a pressurized oil film between relatively movable bearing surfaces |
| JPS6110115A (en) * | 1985-05-22 | 1986-01-17 | Hitachi Ltd | Air-bearing type straight advance guide |
| US5391002A (en) * | 1991-04-25 | 1995-02-21 | Mannesmann Rexroth Gmbh | Hydrostatic radial pocket bearing for a servo cylinder |
| JP2002303323A (en) * | 2001-04-05 | 2002-10-18 | Nsk Ltd | Driving device |
| CN101975225A (en) * | 2010-09-29 | 2011-02-16 | 山东大学 | Static pressure sliding bearing with control oil chambers |
| CN204533207U (en) * | 2014-12-23 | 2015-08-05 | 天津尚吉液压设备有限公司 | Highi degree of accuracy linear hydraulic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150408 |