CN103016442A - Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas - Google Patents
Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas Download PDFInfo
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- CN103016442A CN103016442A CN2012105933487A CN201210593348A CN103016442A CN 103016442 A CN103016442 A CN 103016442A CN 2012105933487 A CN2012105933487 A CN 2012105933487A CN 201210593348 A CN201210593348 A CN 201210593348A CN 103016442 A CN103016442 A CN 103016442A
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Abstract
The invention discloses an air suspension friction-free air cylinder provided with a spherical hinge and uninfluenced by high pressure gas. The air suspension friction-free air cylinder comprises a cylinder barrel, a piston, a piston rod and the spherical hinge, wherein the piston is fixedly connected with one end of the piston rod through the spherical hinge; a mounting hole is formed in the other end of the piston rod; a base is mounted at one end of the cylinder barrel; an end cover is mounted at the other end of the cylinder barrel; an air source inlet is arranged on the base; the piston rod penetrates through the end cover; a rod cavity of the cylinder barrel is provided with an air outlet; uniformly distributed throttle holes are formed in the radial direction of the piston; a circle of groove is formed in one side, close to a rodless cavity, of the outer cylindrical surface of the piston; blind holes are formed in the radial direction from the upper side of the groove and through holes are formed along the rod cavity in the wall direction of the piston to form a pressure relief groove; and the pressure relief groove is isolated from the throttle holes. According to the air suspension friction-free air cylinder, the influence of high and low pressure air streams on an air film is effectively avoided and the control precision is higher.
Description
Technical field
The present invention relates to a kind of floating cylinder.
Background technique
Common cylinder adopts mechanical seal usually, has contact friction force between cylinder barrel and the piston.
Traditional low rubbing cylinder relies on and improves machining accuracy, adopts special low-friction material or grease lubrication to reduce friction, but has processing difficulties, cost is high, difficult in maintenance and the life-span is short defective; Perhaps by improving seal form, reduce frictional force, be applied to cylinder such as the special sealing technique of German FESTO company's employing, adopt the one-way sealing seal, have very little resistance of taxing.Japan SMC company adopts ball guide sleeve technology and Gap Sealing Technology, this low rubbing cylinder all has breakthrough aspect at the uniform velocity property, high low pressure friction, high speed and high frequency, yet there are too some defectives, such as to Load Sensitive radially, complex structure, manufacturing difficulty are large, expensive.
For satisfying the requirement of the aspects such as ultraprecise constant force output control, minute-pressure action control, the gas lubrication technology is realizing that zero friction cylinder is applied.As number of patent application be 201120080863.6 " a kind of with air-bearing without the friction cylinder " just announced a kind of according to the air supporting principle design without the friction cylinder, leave minimum gap between cylinder barrel and the piston, the throttle orifice of even cloth is set at piston radial, piston rod by hollow and flexible pipe are the piston air feed in the cylinder, and connect so that can bear certain radial load and seizure of piston not occur in cylinder without the friction cylinder by ball pivot.But the plenum system by hollow piston rod and flexible pipe is complicated, assembling is loaded down with trivial details, easy care not, afterwards to being optimized without the friction cylinder, pressurized air in employing cylinder self cavity volume is as oiling agent, gas is introduced in the gap, make piston in cylinder, be in complete state of suspension, piston do not contact each other with cylinder barrel, thereby eliminated the frictional force between the piston and cylinder barrel in the air cylinder structure.But, no matter adopt which kind of plenum system, owing to leaving the gap between piston and the cylinder barrel, there is very large draught head between the hyperbaric chamber of cylinder and the low-pressure cavity, thereby between the gap, can form air pressure stream, directly affect the air pressure film that piston forms in the gap by throttle orifice, on the other hand, the film formed prerequisite of gas is to have certain draught head in the gap, and raise near the gap air pressure of hyperbaric chamber one end, cause air-film thickness, pressure distribution inhomogeneous, this stability, precision, bearing capacity without the friction cylinder has all been caused impact.
Summary of the invention
In order to overcome existing high low pressure air-flow without the friction cylinder to the deficiency that air film exerts an influence, control accuracy is lower, the invention provides a kind of effectively avoid the high low pressure air-flow to air film exert an influence, control accuracy is higher with the gas suspension of spherical hinge without the friction cylinder.
The technical solution adopted for the present invention to solve the technical problems is:
A kind ofly be not subjected to gas suspension that pressurized gas affect without the friction cylinder with spherical hinge, comprise cylinder barrel, piston, piston rod and spherical hinge, described piston is fixedly connected with by spherical hinge with piston rod one end, the described piston rod the other end is established mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, described piston rod is worn end cap, the rod chamber of described cylinder barrel is provided with the air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through again the hole along piston wall to the rod chamber direction and form pressure relief groove, mutually isolation between described pressure relief groove and the throttle orifice.
Further, described pressure relief groove groove is provided with gradient near rodless cavity one end.
Further again, a circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.
Or: at least two circle pressure relief grooves are distributed in the piston wall.
Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described mounting hole is in order to the tapped hole of spherical hinge to be installed.
Mentality of designing of the present invention is: the end at the close hyperbaric chamber of piston is designed with pressure relief groove, the gas flow that will enter piston and cylinder barrel gap from hyperbaric chamber is discharged to low-pressure cavity after through certain crevice throttle damping decompression in pressure relief groove, do not affect the air film that throttle orifice forms on the piston; Adopt the pneumatic bearing sealing between piston rod and the cylinder sleeve, eliminated the frictional force between piston rod and the cylinder barrel.
Beneficial effect of the present invention is: effectively avoid the high low pressure air-flow to air film exert an influence, control accuracy is higher.
Description of drawings
Fig. 1 a kind ofly is not subjected to gas suspension that pressurized gas affect without friction cylinder schematic diagram with spherical hinge.
Fig. 2 is the piston schematic diagram.
Fig. 3 is Fig. 2 A-A view.
Fig. 4 is Fig. 2 C-C view.
Fig. 5 is gas flow schematic diagram in the cylinder.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
With reference to Fig. 1 ~ Fig. 5, a kind ofly be not subjected to gas suspension that pressurized gas affect without the friction cylinder with spherical hinge, comprise cylinder barrel 4, piston 7, piston rod 2 and spherical hinge 6, described piston 7 is fixedly connected with by spherical hinge 6 with piston rod 2 one ends, described piston rod 2 the other ends have to install the tapped hole 1 of spherical hinge, described cylinder barrel 4 one end mounting base 9, the other end of described cylinder barrel 4 is installed end cap 3, described base 9 is provided with gas source air inlet, described piston rod 2 is worn end cap, the rod chamber of cylinder barrel 4 is provided with air outlet 10, described piston 7 radially arranges uniform throttle orifice 13, and described outside piston cylinder is provided with a circle groove 11 near rodless cavity one side, radially beats blind hole from groove 11 tops, get through again the hole along piston wall to the rod chamber direction and form pressure relief groove 12, mutually isolation between described pressure relief groove 12 and the throttle orifice 13.
Described pressure relief groove groove is provided with gradient near rodless cavity one end.One circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.Or: at least two circle pressure relief grooves are distributed in the piston wall.Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described rod chamber is low-pressure cavity 5, and rodless cavity is hyperbaric chamber 8.
In the present embodiment, there is minimum gap between described piston and cylinder, described base and cylinder barrel are terminal fixing, described cylinder barrel, base form hyperbaric chamber at an end of piston, described end cap is installed in the cylinder barrel end, and described air-bearing, cylinder barrel form low-pressure cavity at the piston the other end, on the low-pressure cavity cylinder barrel wall air outlet O are arranged, source of the gas enters hyperbaric chamber from cylinder air inlet P1, the pushing piston frictionless motion.
The piston rod two ends are connected with exterior part with piston by spherical hinge, so that can bear certain radial load without the friction cylinder, avoid causing seizure of piston in cylinder because piston rod deflects.
The throttle orifice of even cloth is set on the described piston radial, and the quantity of throttle orifice can be arranged one or more groups; The outside piston cylinder is designed with a circle groove near hyperbaric chamber one side, radially beats blind hole from groove top, gets through the hole along piston wall to the low-pressure cavity direction again and forms pressure relief groove, and one or more groups pressure relief groove is distributed in the piston wall, and does not communicate between the throttle orifice; In Fig. 2, nearly hyperbaric chamber one end of pressure relief groove groove becomes certain gradient, and therefore, the air-flow that enters piston and cylinder gap from hyperbaric chamber directly flow in the low-pressure cavity from pressure relief groove; Pressure relief groove also can be split into other form, can conveniently derive hyperbaric chamber and press people's air-flow to get final product; Gas in the hyperbaric chamber forms air film through throttle orifice between piston and cylinder gap, air film gas part flows directly into low-pressure cavity along piston and cylinder barrel gap, and remaining flows into low-pressure cavity through pressure relief groove.And do not affect air film between piston and cylinder barrel from the gas that hyperbaric chamber enters the gap, such as Fig. 3.
Above-mentioned example is used for explaining the present invention, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, the present invention is made any modification and change, all falls into protection scope of the present invention.
Claims (6)
1. one kind is not subjected to gas suspension that pressurized gas affect without the friction cylinder with spherical hinge, it is characterized in that: described gas suspension comprises cylinder barrel without the friction cylinder, piston, piston rod and spherical hinge, described piston is fixedly connected with by spherical hinge with piston rod one end, the described piston rod the other end is established mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, described piston rod is worn end cap, the rod chamber of described cylinder barrel is provided with the air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through again the hole along piston wall to the rod chamber direction and form pressure relief groove, mutually isolation between described pressure relief groove and the throttle orifice.
As claimed in claim 1 with spherical hinge be not subjected to gas suspension that pressurized gas affect without the friction cylinder, it is characterized in that: described pressure relief groove groove is provided with gradient near rodless cavity one end.
As claimed in claim 1 or 2 with spherical hinge be not subjected to gas suspension that pressurized gas affect without the friction cylinder, it is characterized in that: a circle pressure relief groove is distributed in the piston wall.
As claimed in claim 1 or 2 with spherical hinge be not subjected to gas suspension that pressurized gas affect without the friction cylinder, it is characterized in that: at least two circle pressure relief grooves are distributed in the piston wall.
As claimed in claim 1 or 2 with spherical hinge be not subjected to gas suspension that pressurized gas affect without the friction cylinder, it is characterized in that: described piston is provided with the uniform throttle orifice of at least two group radial direction.
As claimed in claim 1 or 2 with spherical hinge be not subjected to gas suspension that pressurized gas affect without the friction cylinder, it is characterized in that: described mounting hole is in order to install the tapped hole of spherical hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593348.7A CN103016442B (en) | 2012-12-31 | 2012-12-31 | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210593348.7A CN103016442B (en) | 2012-12-31 | 2012-12-31 | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder |
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| CN103016442A true CN103016442A (en) | 2013-04-03 |
| CN103016442B CN103016442B (en) | 2015-12-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245493A (en) * | 2013-04-10 | 2013-08-14 | 浙江工业大学 | Bending moment resistance testing device for frictionless cylinder |
| CN103511391A (en) * | 2013-10-18 | 2014-01-15 | 浙江工业大学 | Constant force output air floating device with air storage sleeve |
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN103527560A (en) * | 2013-10-18 | 2014-01-22 | 浙江工业大学 | Constant-force-output air-floating device with air cylinder compensation function |
| CN107131172A (en) * | 2017-06-04 | 2017-09-05 | 珠海市运泰利自动化设备有限公司 | The new type power structure of equilibrium principle is interlocked based on air |
| CN108302085A (en) * | 2018-03-15 | 2018-07-20 | 江苏大学 | A kind of double acting air supporting friction-free air cylinder of cylinder barrel independent gas supply |
| CN108953471A (en) * | 2018-07-10 | 2018-12-07 | 哈尔滨工业大学 | It is a kind of without friction gravity unloading mechanism |
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| CN102221025A (en) * | 2011-07-18 | 2011-10-19 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN202056133U (en) * | 2011-03-24 | 2011-11-30 | 浙江大学 | Frictionless air cylinder with air flotation bearing |
| CN102374208A (en) * | 2011-11-04 | 2012-03-14 | 中国航空工业集团公司北京航空精密机械研究所 | Aerostatic bearing guiding cylinder without friction interference |
| CN203176047U (en) * | 2012-12-31 | 2013-09-04 | 浙江工业大学 | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas |
-
2012
- 2012-12-31 CN CN201210593348.7A patent/CN103016442B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| CN202056133U (en) * | 2011-03-24 | 2011-11-30 | 浙江大学 | Frictionless air cylinder with air flotation bearing |
| CN102221025A (en) * | 2011-07-18 | 2011-10-19 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN102374208A (en) * | 2011-11-04 | 2012-03-14 | 中国航空工业集团公司北京航空精密机械研究所 | Aerostatic bearing guiding cylinder without friction interference |
| CN203176047U (en) * | 2012-12-31 | 2013-09-04 | 浙江工业大学 | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas |
Non-Patent Citations (1)
| Title |
|---|
| 路波: "零重力环境模拟气动悬挂系统的关键技术研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245493A (en) * | 2013-04-10 | 2013-08-14 | 浙江工业大学 | Bending moment resistance testing device for frictionless cylinder |
| CN103511391A (en) * | 2013-10-18 | 2014-01-15 | 浙江工业大学 | Constant force output air floating device with air storage sleeve |
| CN103527560A (en) * | 2013-10-18 | 2014-01-22 | 浙江工业大学 | Constant-force-output air-floating device with air cylinder compensation function |
| CN103527560B (en) * | 2013-10-18 | 2015-12-02 | 浙江工业大学 | A kind of constant force with compensation cylinder exports air-floating apparatus |
| CN103511391B (en) * | 2013-10-18 | 2015-12-30 | 浙江工业大学 | A kind of constant force with gas storage jacket exports air-floating apparatus |
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN107131172A (en) * | 2017-06-04 | 2017-09-05 | 珠海市运泰利自动化设备有限公司 | The new type power structure of equilibrium principle is interlocked based on air |
| CN107131172B (en) * | 2017-06-04 | 2019-02-12 | 珠海市运泰利自动化设备有限公司 | New type power structure based on air interlocking equilibrium principle |
| CN108302085A (en) * | 2018-03-15 | 2018-07-20 | 江苏大学 | A kind of double acting air supporting friction-free air cylinder of cylinder barrel independent gas supply |
| CN108302085B (en) * | 2018-03-15 | 2023-09-22 | 江苏大学 | Double-acting air-floatation friction-free cylinder with cylinder barrel capable of independently supplying air |
| CN108953471A (en) * | 2018-07-10 | 2018-12-07 | 哈尔滨工业大学 | It is a kind of without friction gravity unloading mechanism |
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
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Address after: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee after: Zhejiang University of Technology Address before: 310014 Chao Wang Road, Xiacheng City, Hangzhou, Zhejiang Province, No. 18 Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20181221 Address after: 401120 No. 5 Shangke Road, Shuangfengqiao Street, Yubei District, Chongqing Patentee after: Chongqing Rongyu Machinery Manufacturing Co., Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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