CN103047220B - Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder - Google Patents
Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder Download PDFInfo
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- CN103047220B CN103047220B CN201210594717.4A CN201210594717A CN103047220B CN 103047220 B CN103047220 B CN 103047220B CN 201210594717 A CN201210594717 A CN 201210594717A CN 103047220 B CN103047220 B CN 103047220B
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- cylinder barrel
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- air
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- 238000009826 distribution Methods 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012229 microporous material Substances 0.000 abstract 5
- 239000007789 gas Substances 0.000 description 19
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 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
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 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
- 239000008041 oiling agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
Disclosed is a cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder. A piston is sleeved in a cylinder barrel with clearance between each other. The piston is fixedly connected with a piston rod. One end of the cylinder barrel is provided with a base while the other end of the cylinder barrel is provided with an end cover. An air source inlet is arranged on the base. The piston rod penetrates through the end cover. The cylinder barrel comprises an outer cylinder barrel and a microporous material layer, wherein the microporous material layer is attached to the inner wall of the outer cylinder barrel, the outer wall of the outer cylinder barrel is provided with an air inlet hole, the microporous material layer is provided with a first groove in axial distribution at the outer wall air inlet hole, the contact surface of the microporous material layer with the inner wall of the outer cylinder barrel is provided with a second groove along the circumferential direction, and the second groove is distributed on the surface of the microporous material layer axially and evenly. One side, close to the air inlet, of the piston is provided a circular third groove. A hole is radially punched in the third groove to be communicated with a cavity, close to a rod cavity, of the piston. The piston rod is connected with one end of a piston cavity. The cavity is communicated with the rod cavity in the cylinder barrel through a through hole. By the air cylinder high in control precision, influences of high-low pressure air flows on air film production are avoided.
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 at the uniform velocity property, high low pressure friction, tell and all have breakthrough in 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 deficiency that high low pressure air-flow has an impact to air film, control accuracy is lower of existing floating cylinder, the invention provides and a kind ofly effectively avoid high low pressure air-flow has an impact to air film, control accuracy is higher cylinder barrel air feed even pressure type air supporting without friction cylinder.
The technical solution adopted for the present invention to solve the technical problems is:
The air supporting of a kind of cylinder barrel air feed even pressure type is without friction cylinder, described air supporting comprises cylinder barrel without friction cylinder, piston, piston rod, base and end cap, described piston sleeve to be contained in cylinder barrel and and there is gap between cylinder barrel, described piston is fixedly connected with piston rod one end, 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 is through end cap, described cylinder barrel comprises outer cylinder and porous material layer, additional one deck porous material layer on described outer cylinder inwall, described outer cylinder outer wall there is inlet hole, described porous material layer has the first groove of an axial distribution at outer wall air inlet position, the surface of described porous material layer and outer cylinder contact internal walls has and along the circumferential direction has the second groove, described second groove is axially uniform on poromerics surface, described piston has a circle the 3rd groove near suction port side, radially punch and the cavity connects of piston near rod chamber side in the 3rd groove, described piston rod and piston have one end of cavity to be connected, and described cavity is communicated with rod chamber in cylinder barrel by through hole.
Further, the inlet hole on described gas source air inlet and cylinder barrel outer wall connects same source of the gas.
Beneficial effect of the present invention is mainly manifested in: effectively avoid that high low pressure air-flow has an impact to air film, control accuracy is higher.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of cylinder barrel air feed even pressure type air supporting without friction cylinder.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1, the air supporting of a kind of cylinder barrel air feed even pressure type is without friction cylinder, be made up of cylinder barrel, piston 6, piston rod 7, base 1, end cap 8, described piston 6 is sleeved in cylinder barrel and between cylinder barrel exists minimum gap 14, described piston is fixedly connected with piston rod 7 one end, described cylinder barrel one end mounting base 1, and the other end of described cylinder barrel installs end cap 8, described base is provided with gas source air inlet 15, and described piston rod 7 is through end cap 8; Described cylinder barrel is made up of outer cylinder 2 and porous material layer 3 two-part, additional one deck porous material layer 3 on described outer cylinder 2 inwall, described outer cylinder 2 outer wall there is inlet hole 13, described porous material layer 3 has the first groove 11 of an axial distribution at air inlet position, described porous material layer 3 has with the surface of outer cylinder 2 contact internal walls and along the circumferential direction has the second groove 4, and described second groove 4 is axially uniform on porous material layer surface.Described piston has a circle the 3rd groove near suction port side, radially punch 5 and the cavity connects of piston near rod chamber side in the 3rd groove, described piston rod 7 has one end of cavity to be connected by screw thread and piston 6, and described cavity is communicated with rod chamber in cylinder barrel by through hole 12.
Described gas source air inlet 15 connects same source of the gas with the inlet hole 13 on cylinder barrel outer wall, ensures that pressure is identical.
In the present embodiment, cylinder barrel becomes according to the principle design of air-bearing air supporting cover, and pressurized gas enter from cylinder air inlet, promotion piston moves, and meanwhile, gas is from the suction port cylinder barrel cylinder barrel, by the porous material layer in inner wall of cylinder, in the gap of piston and cylinder barrel, form air film.The two ends of piston form hyperbaric chamber and low-pressure cavity according to the difference of gas pressure, gas is there is draught head from the prerequisite that poromerics flows out, because the gas in the gas of hyperbaric chamber and cylinder barrel connects same source of the gas, so hyperbaric chamber part does not have quantity of gas leakage, and have fraction in low-pressure cavity from porous material layer internal leakage, but because air leakage amount is minimum, belong to feasible design.Piston one end is by hyperbaric chamber gases affect, gap internal pressure is caused to raise, for being formed, stable air film is unfavorable, therefore, piston has pressure relief groove, pressure relief groove communicates with low-pressure cavity, the gas entering gap from hyperbaric chamber reserves from pressure relief groove after damping seal, meanwhile, create the low pressure area in gap, facilitate the formation of stable air film.
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 (2)
1. cylinder barrel air feed even pressure type air supporting is without friction cylinder, described air supporting comprises cylinder barrel without friction cylinder, piston, piston rod, base and end cap, described piston sleeve to be contained in cylinder barrel and and there is gap between cylinder barrel, described piston is fixedly connected with piston rod one end, 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 is through end cap, it is characterized in that: described cylinder barrel comprises outer cylinder and porous material layer, additional one deck porous material layer on described outer cylinder inwall, described outer cylinder outer wall there is inlet hole, described porous material layer has the first groove of an axial distribution at outer wall air inlet position, along the circumferential direction there is the second groove on the surface of described porous material layer and outer cylinder contact internal walls, described second groove is axially uniform on porous material layer surface, described piston has a circle the 3rd groove near suction port side, radially punch and the cavity connects of piston near rod chamber side in the 3rd groove, described piston rod and piston have one end of cavity to be connected, and described cavity is communicated with rod chamber in cylinder barrel by through hole.
2. cylinder barrel air feed even pressure type air supporting as claimed in claim 1 is without friction cylinder, it is characterized in that: the inlet hole on described gas source air inlet and cylinder barrel outer wall connects same source of the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594717.4A CN103047220B (en) | 2012-12-31 | 2012-12-31 | Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594717.4A CN103047220B (en) | 2012-12-31 | 2012-12-31 | Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103047220A CN103047220A (en) | 2013-04-17 |
| CN103047220B true CN103047220B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210594717.4A Active CN103047220B (en) | 2012-12-31 | 2012-12-31 | Cylinder barrel air supply pressure equalizing air floatation friction-free air cylinder |
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| CN (1) | CN103047220B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678115A (en) * | 2015-11-09 | 2017-05-17 | Smc(中国)有限公司 | Welding gun cylinder and welding gun cylinder system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104033443A (en) * | 2014-05-20 | 2014-09-10 | 苏州好特斯模具有限公司 | Split type double-layer air cylinder |
| CN106122363B (en) * | 2016-08-12 | 2018-01-05 | 浙江工业大学 | A kind of brake buffer unit of sun wing plate air supporting erecting by overhang |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351505A (en) * | 1989-07-18 | 1991-03-05 | Eiko Sokki Kk | Air cylinder |
| JPH06264925A (en) * | 1993-03-08 | 1994-09-20 | Tokyo Seimitsu Co Ltd | Rotating apparatus with static pressure air bearing and manufacture of inner tube thereof |
| JPH07224807A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Cylinder device |
| JP2001227509A (en) * | 2000-02-17 | 2001-08-24 | Tokyo Seimitsu Sokki Kk | Frictionless air cylinder |
| CN2809304Y (en) * | 2005-07-01 | 2006-08-23 | 台中精机厂股份有限公司 | Cylinder piston without contact type seal element |
| CN201096118Y (en) * | 2007-09-30 | 2008-08-06 | 昆山市创新科技检测仪器有限公司 | Undamped static pressure cylinder piston device |
| WO2009155945A1 (en) * | 2008-06-26 | 2009-12-30 | Festo Ag & Co. Kg | Fluidic device |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
| CN202194883U (en) * | 2011-07-18 | 2012-04-18 | 浙江亿太诺气动科技有限公司 | Air-float zero-friction air cylinder |
| CN203051294U (en) * | 2012-12-31 | 2013-07-10 | 浙江工业大学 | Cylinder barrel air supply pressure-equalizing type air flotation non-friction air cylinder |
-
2012
- 2012-12-31 CN CN201210594717.4A patent/CN103047220B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351505A (en) * | 1989-07-18 | 1991-03-05 | Eiko Sokki Kk | Air cylinder |
| JPH06264925A (en) * | 1993-03-08 | 1994-09-20 | Tokyo Seimitsu Co Ltd | Rotating apparatus with static pressure air bearing and manufacture of inner tube thereof |
| JPH07224807A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Cylinder device |
| JP2001227509A (en) * | 2000-02-17 | 2001-08-24 | Tokyo Seimitsu Sokki Kk | Frictionless air cylinder |
| CN2809304Y (en) * | 2005-07-01 | 2006-08-23 | 台中精机厂股份有限公司 | Cylinder piston without contact type seal element |
| CN201096118Y (en) * | 2007-09-30 | 2008-08-06 | 昆山市创新科技检测仪器有限公司 | Undamped static pressure cylinder piston device |
| WO2009155945A1 (en) * | 2008-06-26 | 2009-12-30 | Festo Ag & Co. Kg | Fluidic device |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
| CN202194883U (en) * | 2011-07-18 | 2012-04-18 | 浙江亿太诺气动科技有限公司 | Air-float zero-friction air cylinder |
| CN203051294U (en) * | 2012-12-31 | 2013-07-10 | 浙江工业大学 | Cylinder barrel air supply pressure-equalizing type air flotation non-friction air cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678115A (en) * | 2015-11-09 | 2017-05-17 | Smc(中国)有限公司 | Welding gun cylinder and welding gun cylinder system |
| CN106678115B (en) * | 2015-11-09 | 2020-01-07 | Smc(中国)有限公司 | Welding gun cylinder and welding gun cylinder system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103047220A (en) | 2013-04-17 |
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| C06 | Publication | ||
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| 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 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181220 Address after: 401320 Jinzhu Industrial Park, Yudong Fenghua Road, Banan District, Chongqing Patentee after: CHONGQING SHUANGSHI MOTORCYCLE MANUFACTURING CO., LTD. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Cylinder supply pressure equalizing air floating friction free cylinder Effective date of registration: 20210624 Granted publication date: 20150218 Pledgee: Chongqing Rural Commercial Bank Co.,Ltd. Nan'an sub branch Pledgor: CHONGQING SHUANGSHI MOTORCYCLE MANUFACTURING Co.,Ltd. Registration number: Y2021500000026 |