CN103016441A - Air flotation cylinder for forming stable air film by microporous material - Google Patents

Air flotation cylinder for forming stable air film by microporous material Download PDF

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Publication number
CN103016441A
CN103016441A CN2012105932840A CN201210593284A CN103016441A CN 103016441 A CN103016441 A CN 103016441A CN 2012105932840 A CN2012105932840 A CN 2012105932840A CN 201210593284 A CN201210593284 A CN 201210593284A CN 103016441 A CN103016441 A CN 103016441A
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CN
China
Prior art keywords
piston
air
cylinder barrel
cylinder
groove
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CN2012105932840A
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Chinese (zh)
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CN103016441B (en
Inventor
单晓杭
周海清
孙建辉
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浙江工业大学
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Priority to CN201210593284.0A priority Critical patent/CN103016441B/en
Publication of CN103016441A publication Critical patent/CN103016441A/en
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Publication of CN103016441B publication Critical patent/CN103016441B/en

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Abstract

The invention discloses an air flotation cylinder for forming stable air film by a microporous material. The air flotation cylinder comprises a cylinder barrel, a piston, an air bearing and a piston rod, wherein the piston is fixedly connected with one end of the piston rod; a base is installed at one end of the cylinder barrel; an end cover is installed at the other end of the cylinder barrel; an air inlet is arranged on the base; an inner wall of the cylinder barrel is connected with an outer ring of the air bearing; the piston rod passes through an inner ring of the air bearing and the end cover; a rod cavity of the cylinder barrel is provided with an air outlet; the piston comprises a piston sleeve and a microporous material layer; a section of boss is arranged on one side (of the piston sleeve) close to a high pressure cavity; a gap is arranged between the boss and the cylinder barrel; the microporous material layer is sleeved over an outer surface of the other side of the boss to form a complete cylindrical piston; an air inlet is arranged on an inner wall of the piston bush and communicated with the high pressure cavity; the microporous material layer is provided with a groove on the air inlet of the piston bush and along axial direction of the piston; and an annular groove is axially distributed on an inner wall of the microporous material layer. This air flotation cylinder is good in stability and high in control precision.

Description

A kind ofly adopt poromerics to form to stablize the air supporting of air film without the friction cylinder

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 at the uniform velocity property, high low pressure friction, tell and high frequency aspect all have breakthrough, 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 the lower deficiency of less stable, control accuracy of existing floating cylinder, the invention provides a kind ofly have good stability, employing poromerics that control accuracy is higher form stablize air film air supporting without the cylinder that rubs.

The technical solution adopted for the present invention to solve the technical problems is:

A kind ofly adopt poromerics to form to stablize the air supporting of air film without the friction cylinder, comprise cylinder barrel, piston, air-bearing and piston rod, described piston is fixedly connected with piston rod one end, 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, the inwall of described cylinder barrel is connected with the air-bearing outer ring, described piston rod passes inner ring and the end cap of air-bearing, the rod chamber of cylinder barrel is provided with the air outlet, described piston comprises piston sleeve and poromerics layer, described piston sleeve has one section boss near hyperbaric chamber one side, leave the gap between described boss and cylinder barrel, the outer surface that described poromerics layer is sleeved on the boss opposite side forms complete cylindrical piston, on the described piston sleeve inwall inlet hole is arranged, and described inlet hole communicates with hyperbaric chamber, described poromerics layer has one along the groove of piston axial direction at the enterprising pore of piston sleeve place, and annular groove and axially uniform is arranged on the inwall of described poromerics layer.

Further, described piston sleeve boss external cylindrical surface place is provided with a circle groove, radially beats blind hole from the groove top, gets through the hole along the piston jacket wall to the rod chamber direction again and forms pressure relief groove, and described pressure relief groove groove is provided with gradient near rodless cavity one end.

Beneficial effect of the present invention is mainly manifested in: 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 adopts poromerics to form to stablize the air supporting of air film without the schematic diagram of friction cylinder.

Fig. 2 is the structural drawing of piston.

Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is the B-B sectional view of Fig. 2.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

With reference to Fig. 1~Fig. 4, a kind ofly adopt poromerics to form to stablize the air supporting of air film without the friction cylinder, comprise cylinder barrel 3, piston, air-bearing 4 and piston rod 1, described piston is fixedly connected with piston rod 1 one ends, described cylinder barrel 3 one end mounting base 11, the other end of described cylinder barrel 3 is installed end cap 2, described base 11 is provided with gas source air inlet 12, the inwall of described cylinder barrel 3 is connected with air-bearing 4 outer rings, described piston rod 1 passes inner ring and the end cap 2 of air-bearing 4, and the rod chamber of cylinder barrel 3 is provided with air outlet 16.

Described piston is comprised of poromerics 5 and piston sleeve 8, described piston sleeve 8 has one section boss near hyperbaric chamber one side, leave minimum gap between described boss and cylinder barrel, described poromerics cover 5 outer surfaces that are contained in the boss opposite side form complete cylindrical piston, on described piston sleeve 8 inwalls inlet hole 13 is arranged, described inlet hole communicates with hyperbaric chamber, described poromerics 5 has one along the groove of piston axial direction at the enterprising pore of piston sleeve place, and annular groove 6 and axially uniform is arranged on the described poromerics inwall.

Described piston sleeve boss external cylindrical surface place is provided with a circle groove 10, radially beats blind hole from the groove top, gets through hole 9 along the piston jacket wall to the rod chamber direction again and forms pressure relief groove, and described pressure relief groove groove is provided with gradient near rodless cavity one end.

Claims (2)

1. an air supporting of adopting poromerics to form to stablize air film is without the friction cylinder, comprise cylinder barrel, piston, air-bearing and piston rod, described piston is fixedly connected with piston rod one end, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, and described base is provided with gas source air inlet, the inwall of described cylinder barrel is connected with the air-bearing outer ring, described piston rod passes inner ring and the end cap of air-bearing, and the rod chamber of cylinder barrel is provided with the air outlet, it is characterized in that:
Described piston comprises piston sleeve and poromerics layer, described piston sleeve has one section boss near hyperbaric chamber one side, leave the gap between described boss and cylinder barrel, the outer surface that described poromerics layer is sleeved on the boss opposite side forms complete cylindrical piston, on the described piston sleeve inwall inlet hole is arranged, described inlet hole communicates with hyperbaric chamber, described poromerics layer has one along the groove of piston axial direction at the enterprising pore of piston sleeve place, and annular groove and axially uniform is arranged on the inwall of described poromerics layer.
2. employing poromerics as claimed in claim 1 forms the air supporting of stablizing air film without the friction cylinder, it is characterized in that: described piston sleeve boss external cylindrical surface place is provided with a circle groove, radially beat blind hole from the groove top, get through the hole along the piston jacket wall to the rod chamber direction again and form pressure relief groove, described pressure relief groove groove is provided with gradient near rodless cavity one end.
CN201210593284.0A 2012-12-31 2012-12-31 Air flotation cylinder for forming stable air film by microporous material CN103016441B (en)

Priority Applications (1)

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CN201210593284.0A CN103016441B (en) 2012-12-31 2012-12-31 Air flotation cylinder for forming stable air film by microporous material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210593284.0A CN103016441B (en) 2012-12-31 2012-12-31 Air flotation cylinder for forming stable air film by microporous material

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CN103016441B CN103016441B (en) 2015-02-18

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Cited By (7)

* Cited by examiner, † Cited by third party
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
CN103508385A (en) * 2013-10-18 2014-01-15 浙江工业大学 Long distance and two-dimensional constant force hoisting device
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
CN103523719A (en) * 2013-10-18 2014-01-22 浙江工业大学 Long-distance two-dimensional following constant force hoisting device
CN104595277A (en) * 2014-12-29 2015-05-06 广东工业大学 Friction-free quick-response balancing device
CN104806584A (en) * 2015-04-20 2015-07-29 广东工业大学 Frictionless quick-response balance system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07224807A (en) * 1994-02-10 1995-08-22 Nippondenso Co Ltd Cylinder device
CN2520436Y (en) * 2002-01-23 2002-11-13 周磊 W-inner cavity medium pressure self-compensation sealing ring
CN1986337A (en) * 2006-12-02 2007-06-27 中国科学院合肥物质科学研究院 Three-dimensional air floating platform and pneumatic gravitational compensation method
CN101429984A (en) * 2008-12-01 2009-05-13 江阴强顺科技有限公司 Hydraulic damper with excellent leak tightness
CN201636125U (en) * 2010-04-07 2010-11-17 大连万讯电力仪表有限公司 Oil-free lubricating structure of power cylinder
CN102155465A (en) * 2011-03-24 2011-08-17 浙江大学 Zero-friction air cylinder with air 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
CN203176049U (en) * 2012-12-31 2013-09-04 浙江工业大学 Air flotation friction-free air cylinder for adopting cellular materials to form stable air film

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07224807A (en) * 1994-02-10 1995-08-22 Nippondenso Co Ltd Cylinder device
CN2520436Y (en) * 2002-01-23 2002-11-13 周磊 W-inner cavity medium pressure self-compensation sealing ring
CN1986337A (en) * 2006-12-02 2007-06-27 中国科学院合肥物质科学研究院 Three-dimensional air floating platform and pneumatic gravitational compensation method
CN101429984A (en) * 2008-12-01 2009-05-13 江阴强顺科技有限公司 Hydraulic damper with excellent leak tightness
CN201636125U (en) * 2010-04-07 2010-11-17 大连万讯电力仪表有限公司 Oil-free lubricating structure of power cylinder
CN102155465A (en) * 2011-03-24 2011-08-17 浙江大学 Zero-friction air cylinder with air 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
CN203176049U (en) * 2012-12-31 2013-09-04 浙江工业大学 Air flotation friction-free air cylinder for adopting cellular materials to form stable air film

Cited By (12)

* Cited by examiner, † Cited by third party
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
CN103508385A (en) * 2013-10-18 2014-01-15 浙江工业大学 Long distance and two-dimensional constant force hoisting device
CN103511391A (en) * 2013-10-18 2014-01-15 浙江工业大学 Constant force output air floating device with air storage sleeve
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
CN103523719A (en) * 2013-10-18 2014-01-22 浙江工业大学 Long-distance two-dimensional following constant force hoisting device
CN103508385B (en) * 2013-10-18 2015-08-05 浙江工业大学 A kind of long-distance 2 D constant force erecting by overhang
CN103523719B (en) * 2013-10-18 2015-08-05 浙江工业大学 Long-distance 2 D follows constant force erecting by overhang
CN103527570A (en) * 2013-10-23 2014-01-22 浙江工商大学 High-precision constant force-output air floatation device
CN104595277A (en) * 2014-12-29 2015-05-06 广东工业大学 Friction-free quick-response balancing device
CN104595277B (en) * 2014-12-29 2017-01-04 广东工业大学 A kind of without the quick response balance device that rubs
CN104806584A (en) * 2015-04-20 2015-07-29 广东工业大学 Frictionless quick-response balance system
CN104806584B (en) * 2015-04-20 2017-02-01 广东工业大学 Frictionless quick-response balance system

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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: 20181220

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

TR01 Transfer of patent right