CN103016442B - A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder - Google Patents
A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder Download PDFInfo
- Publication number
- CN103016442B CN103016442B CN201210593348.7A CN201210593348A CN103016442B CN 103016442 B CN103016442 B CN 103016442B CN 201210593348 A CN201210593348 A CN 201210593348A CN 103016442 B CN103016442 B CN 103016442B
- Authority
- CN
- China
- Prior art keywords
- piston
- cylinder
- spherical hinge
- gas
- pressure relief
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 16
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder, described gas suspension comprises cylinder barrel without 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 establishes mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel installs end cap, described base is provided with gas source air inlet, described piston rod wears end cap, the rod chamber of described cylinder barrel is provided with air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity side, radially blind hole is beaten above groove, get through hole again along piston wall to rod chamber direction and form pressure relief groove, mutually isolated between described pressure relief groove and throttle orifice.The present invention effectively avoids that high low pressure air-flow has an impact to air film, control accuracy is higher.
Description
Technical field
The present invention relates to a kind of floating cylinder.
Background technique
Common cylinder adopts mechanical seal usually, there is contact friction force between cylinder barrel and piston.
Traditional low rubbing cylinder relies on and improves machining accuracy, adopts special low-friction material or grease lubrication to reduce friction, but there is high, the difficult in maintenance and defect that the life-span is short of processing difficulties, cost; Or by improving seal form, reducing frictional force, as German FESTO company adopts special sealing technique to be applied to cylinder, adopting one-way sealing seal, there is very little resistance of taxing.SMC company of Japan adopts ball guide sleeve technology and Gap Sealing Technology, this low rubbing cylinder all has breakthrough at the uniform velocity property, high low pressure friction, high speed and high frequency, but there are some defects too, such as to radial Load Sensitive, complex structure, manufacturing difficulty are large, expensive.
Export the requirement of the aspects such as control, minute-pressure action control for meeting ultraprecise constant force, gas lubrication technology is realizing zero friction cylinder is applied." a kind of nothing friction cylinder with air-bearing " that be 201120080863.6 as number of patent application just discloses a kind of nothing friction cylinder according to air supporting principle design, minimum gap is left between cylinder barrel and piston, piston radial arranges the throttle orifice of even cloth, by the piston air feed that the piston rod of hollow and flexible pipe are in cylinder, and connected by ball pivot and make without friction cylinder can bear certain radial load and seizure of piston does not occur in cylinder.But it is complicated by the plenum system of hollow piston rod and flexible pipe, assemble loaded down with trivial details, not easy care, be optimized without friction cylinder afterwards, pressurized air in employing cylinder self cavity volume is as oiling agent, gas is introduced in gap, piston is made to be in complete state of suspension in the cylinder, piston does not contact each other with cylinder barrel, thus eliminates the frictional force in air cylinder structure between piston and cylinder barrel.But, no matter adopt which kind of plenum system, owing to leaving gap between piston and cylinder barrel, very large draught head is there is between the hyperbaric chamber of cylinder and low-pressure cavity, thus air pressure stream can be formed between gap, the direct air pressure film affecting piston and formed in gap by throttle orifice, on the other hand, the prerequisite of gas film behavior there is certain draught head in gap, and the gap air pressure near hyperbaric chamber one end raises, cause air-film thickness, pressure distribution uneven, all impact is caused to this nothing friction stability of cylinder, precision, bearing capacity.
Summary of the invention
In order to overcome the existing deficiency that high low pressure air-flow has an impact to air film, control accuracy is lower without friction cylinder, the invention provides a kind of gas suspension of the band spherical hinge that high low pressure air-flow has an impact to air film, control accuracy is higher of effectively avoiding without friction cylinder.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder, 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 establishes mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel installs end cap, described base is provided with gas source air inlet, described piston rod wears end cap, the rod chamber of described cylinder barrel is provided with air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity side, radially blind hole is beaten above groove, get through hole again along piston wall to rod chamber direction and form pressure relief groove, mutually isolated between described pressure relief groove and 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 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 piston wall.
Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described mounting hole is the tapped hole installing spherical hinge.
Mentality of designing of the present invention is: be designed with pressure relief groove at piston near one end of hyperbaric chamber, the gas flow entering piston and bore clearances from hyperbaric chamber is discharged to low-pressure cavity after certain crevice throttle damping is reduced pressure in pressure relief groove, does not affect the air film that on piston, throttle orifice is formed; Adopt pneumatic bearing to seal between piston rod and cylinder sleeve, eliminate the frictional force between piston rod and cylinder barrel.
Beneficial effect of the present invention is: effectively avoid that high low pressure air-flow has an impact to air film, control accuracy is higher.
Accompanying drawing explanation
Fig. 1 is that a kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder schematic diagram.
Fig. 2 is piston schematic diagram.
Fig. 3 is Fig. 2 A-A view.
Fig. 4 is Fig. 2 C-C view.
Fig. 5 is that cylinder interior gas flows to schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1 ~ Fig. 5, a kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder, 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 end, described piston rod 2 the other end has the tapped hole 1 installing spherical hinge, described cylinder barrel 4 one end mounting base 9, the other end of described cylinder barrel 4 installs end cap 3, described base 9 is provided with gas source air inlet, described piston rod 2 wears end cap, the rod chamber of cylinder barrel 4 is provided with air outlet 10, described piston 7 radial direction arranges uniform throttle orifice 13, described outside piston cylinder is provided with a circle groove 11 near rodless cavity side, radially blind hole is beaten above groove 11, get through hole again along piston wall to rod chamber direction and form pressure relief groove 12, mutually isolated between described pressure relief groove 12 and 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 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 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, minimum gap is there is between described piston and cylinder, described base and cylinder barrel end are fixed, described cylinder barrel, base form hyperbaric chamber in one end of piston, described end cap is arranged on cylinder barrel end, and described air-bearing, cylinder barrel form low-pressure cavity at the piston the other end, and low-pressure cavity cylinder barrel wall has air outlet O, source of the gas enters hyperbaric chamber from cylinder air inlet P1, promotes piston frictionless motion.
Piston rod two ends are connected with piston and exterior part by spherical hinge, make bear certain radial load without friction cylinder, avoid causing seizure of piston in cylinder because piston rod deflects.
Described piston radial is arranged the throttle orifice of even cloth, the quantity of throttle orifice can arrange one or more groups; Outside piston cylinder is designed with a circle groove near hyperbaric chamber side, above groove, radially beat blind hole, then gets through hole formation pressure relief groove along piston wall to low-pressure cavity direction, and one or more groups pressure relief groove is distributed in piston wall, does not communicate with between throttle orifice; As in Fig. 2, pressure relief groove groove nearly hyperbaric chamber one end becomes certain gradient, and therefore, the air-flow entering piston and cylinder gap from hyperbaric chamber directly flow in low-pressure cavity from pressure relief groove; The form that pressure relief groove also can be split into other, conveniently can derive the air-flow of hyperbaric chamber pressure people; Gas in hyperbaric chamber forms air film through throttle orifice between piston and cylinder gap, and air film gas fraction flows directly into low-pressure cavity along piston and bore clearances, and remaining flows into low-pressure cavity through pressure relief groove.And do not affect the air film between piston and cylinder barrel, as Fig. 3 from the gas that hyperbaric chamber enters gap.
Above-mentioned example is used for explaining the present invention, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, makes any amendment and change, all fall into protection scope of the present invention to the present invention.
Claims (6)
1. the gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder, it is characterized in that: described gas suspension comprises cylinder barrel without 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 establishes mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel installs end cap, described base is provided with gas source air inlet, described piston rod wears end cap, the rod chamber of described cylinder barrel is provided with air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity side, radially blind hole is beaten above groove, get through hole again along piston wall to rod chamber direction and form pressure relief groove, mutually isolated between described pressure relief groove and throttle orifice.
2. the gas suspension do not affected by pressurized gas of band spherical hinge as claimed in claim 1 is without the cylinder that rubs, and it is characterized in that: described pressure relief groove groove is provided with gradient near rodless cavity one end.
3. the gas suspension do not affected by pressurized gas of band spherical hinge as claimed in claim 1 or 2 is without friction cylinder, it is characterized in that: one encloses pressure relief groove is distributed in piston wall.
4. the gas suspension do not affected by pressurized gas of band spherical hinge as claimed in claim 1 or 2 is without friction cylinder, it is characterized in that: at least two enclose pressure relief grooves is distributed in piston wall.
5. the gas suspension do not affected by pressurized gas of band spherical hinge as claimed in claim 1 or 2 is without the cylinder that rubs, and it is characterized in that: described piston is provided with the uniform throttle orifice of at least two group radial direction.
6. the gas suspension do not affected by pressurized gas of band spherical hinge as claimed in claim 1 or 2 is without the cylinder that rubs, and it is characterized in that: described mounting hole is the tapped hole installing 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103016442A CN103016442A (en) | 2013-04-03 |
| CN103016442B true CN103016442B (en) | 2015-12-30 |
Family
ID=47965410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210593348.7A Active 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103016442B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245493B (en) * | 2013-04-10 | 2015-05-13 | 浙江工业大学 | Bending moment resistance testing device for frictionless cylinder |
| 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 |
| 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 |
| CN103527570B (en) * | 2013-10-23 | 2015-09-02 | 浙江工商大学 | A kind of high-precision constant force exports air-floating apparatus |
| 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 |
| 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 |
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 |
|---|
| 零重力环境模拟气动悬挂系统的关键技术研究;路波;《中国博士学位论文全文数据库 工程科技Ⅱ辑》;20091115;第25-27页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103016442A (en) | 2013-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103016442B (en) | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder | |
| CN103016443B (en) | A kind of gas suspension with pressure relief groove is without friction cylinder | |
| CN103047221B (en) | Double-action gas suspension is without friction cylinder | |
| CN103016445B (en) | Air-suspending frictionless cylinder with pressure equalizing type gas unloading groove | |
| CN103016441B (en) | Air flotation cylinder for forming stable air film by microporous material | |
| CN103016444B (en) | Air-suspending friction-free air cylinder with cylinder barrels for air supply | |
| CN102155465A (en) | Zero-friction air cylinder with air bearing | |
| CN203051293U (en) | Air-suspending frictionless cylinder with pressure-relieving groove | |
| CN102486208B (en) | Self-compensating hydrostatic journal bearing | |
| ITCO20120019A1 (en) | LABYRINTH HIGHLY DAMPENED SEALS WITH HELICOIDAL AND CYLINDRICAL-MIXED SHAPE | |
| CN103016529B (en) | Air floatation combination device not affected by air pipe disturbance and high-pressure gas | |
| CN103047220B (en) | Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder | |
| CN103511385B (en) | High frequency loads servo vibration hydraulic cylinder | |
| CN101818759B (en) | Air flotation device following one-dimensional motion trail of lifting point at overlength distance without being influenced by air pipe disturbance | |
| CN202056133U (en) | Frictionless air cylinder with air flotation bearing | |
| CN203051294U (en) | Cylinder barrel air supply pressure-equalizing type air flotation non-friction air cylinder | |
| CN203176047U (en) | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas | |
| CN203051292U (en) | Double-acting air-suspending zero-friction air cylinder | |
| CN104454993A (en) | Aerostatic-pressurized thrust bearing | |
| CN105179478B (en) | A kind of Porous gas suspension support system applied to full physical simulation | |
| CN203176049U (en) | Air flotation friction-free air cylinder for adopting cellular materials to form stable air film | |
| CN203051295U (en) | Air-suspending frictionless air cylinder with cylinder barrel supplying air | |
| CN103453017A (en) | Dynamic and static pressure air floating bearing with zooming structure molded line | |
| CN203176048U (en) | Air discharging groove pressure equalizing type air-suspending friction-free cylinder | |
| CN201908955U (en) | Pressure equalization groove structure for pneumatic bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
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 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
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 |