CN103234667A - Test method of air-suspending frictionless cylinder - Google Patents
Test method of air-suspending frictionless cylinder Download PDFInfo
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- CN103234667A CN103234667A CN2013101238281A CN201310123828A CN103234667A CN 103234667 A CN103234667 A CN 103234667A CN 2013101238281 A CN2013101238281 A CN 2013101238281A CN 201310123828 A CN201310123828 A CN 201310123828A CN 103234667 A CN103234667 A CN 103234667A
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- supporting pad
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Abstract
Disclosed is a test method of an air-suspending frictionless cylinder. A test device for implementing the method comprises a frame, a cushion block and an air floatation cushion. The test method includes the steps: (1) supplying air to the air floatation cushion and the air-suspending frictionless cylinder, enabling the cushion block to move axially along with a cylinder piston to achieve a steady state under the action of the air floatation cushion, reserving a clearance between the air floatation cushion and the cushion block, forming an air film in the clearance, and enabling the air floatation cushion and the cushion block to have force effect mutually, but to be free of friction force; and (2) rotating a piston rod, if the piston and the cylinder barrel are free of friction force mutually but only subjected to air resistance, enabling the piston to stop slowly, then controlling the position of the piston in the cylinder barrel by adjusting the position of the air floatation cushion so as to perform further detection of the friction force, and if speed of the piston during rotation is decreased obviously, indicating that frictional resistance is existed between the piston and the cylinder barrel. By the test method, whether friction force is existed between the piston in the air-suspending frictionless cylinder and the cylinder barrel or not can be measured effectively in a high-precision manner.
Description
Technical field
The present invention relates to friction force check field, especially a kind of gas suspension does not have the method for inspection of friction Pneumatic Cylinder with Friction.
Background technology
Along with modern industry and high-tech develop rapidly, the gas bearing technology is used widely, and it is to replace oil as lubricant with gas, constitutes air film between axle and bearing holder (housing, cover), makes active face and stationary face avoid the desirable supporting member that directly contacts.The gas lubrication technology also is applied on realization zero friction cylinder, leave minimum gap between cylinder barrel and the piston, and at piston radial the even throttle orifice that distributes is set, pressurized air in employing cylinder self cavity volume is as lubricant, gas is introduced in the gap, make piston be in complete suspended state in cylinder, piston does not contact each other with cylinder barrel, thereby has eliminated the friction force between the piston and cylinder barrel in the air cylinder structure.
Gas suspension does not have the friction cylinder very high requirement on machining accuracy is arranged, and manufactured gas suspension is not had the friction cylinder will carry out the check of friction force.Can if do not exist in friction force between air-bearing shafts and the air supporting cover, only be subjected to air resistance along axial rotation air-bearing shafts or air supporting cover for common air bearing, then Xuan Zhuan air-bearing shafts or air supporting cover can stop slowly.But do not have the friction cylinder for gas suspension, piston all needs to carry out the check of friction force when being in the cylinder barrel any position, satisfies the friction free requirement.After the cylinder ventilation, move axially because piston is stressed, need apply a power at the piston rod axial direction and come the balance piston position, if adopt counterweight to be fixed on the end of piston rod, the rotary-piston bar carries out the friction force check, inertia force influence when rotating because of counterweight is far longer than air resistance and friction force, can not satisfy the detection requirement, and does not have effective method to come the position of control piston in cylinder barrel.
Summary of the invention
Can't realize in the prior art that in order to overcome gas suspension does not have the problem of friction Pneumatic Cylinder with Friction check, the invention provides a kind of gas suspension of can effectively measuring does not have the method for inspection that whether exists friction force, gas suspension that precision is high not to have the friction cylinder between friction piston and cylinder barrel.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of gas suspension does not have the method for inspection of friction cylinder, the verifying attachment of realizing this method comprises frame, the gentle camel of cushion block, the rodless cavity side that described gas suspension to be tested does not have the friction cylinder vertically is fixed on the frame, described cushion block is fixed on the end that does not have the friction cylinder piston rod, described air supporting pad is installed in the cushion block upper surface, described air supporting pad is installed on the elevating mechanism and is concentric with described cushion block, described air supporting pad is positioned on the described cushion block and air-flotation type connection between the two, described elevating mechanism is installed on the frame, described elevating mechanism is provided with air supporting pad air supply opening, and described support is provided with the air admission hole that does not have the friction cylinder;
The described method of inspection comprises the steps:
(1) there is not friction cylinder air feed to air supporting pad and gas suspension, cushion block moves vertically with cylinder piston, is issued to stable state in the effect of air supporting pad, has the gap between air supporting pad and cushion block, form air film in the gap, have the effect of power between air supporting pad and the cushion block but do not have friction force;
(2) rotating piston bar if do not have friction force between piston and the cylinder barrel, only is subjected to air resistance, and piston can stop slowly, comes the position of control piston in cylinder barrel to carry out the detection of further friction force by the position of adjusting the air supporting pad again; In the piston rotary course, if speed obviously descends, then illustrate between piston and cylinder barrel to have frictional resistance.
Technical conceive of the present invention is: between the cushion block of air supporting pad and piston-rod end by gas lubrication, there is not friction force during relative motion, the cushion block of cylinder ventilation back piston bar end is under the effect of air supporting pad, in cylinder barrel, can reach the state of suspension, and the air supporting pad is fixed on the air supporting base can adjust the position at the adjustment support, checks gas suspension not have the friction cylinder by the rotating piston bar and whether has friction force.Air bearing is installed is and deflect when preventing the piston rotation.
Beneficial effect of the present invention mainly shows: effectively measuring gas suspension does not have between friction piston and cylinder barrel whether have friction force, precision height.
Description of drawings
Fig. 1 is the synoptic diagram that gas suspension does not have the verifying attachment of friction cylinder.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1, a kind of high-precision gas suspension does not have the method for inspection of friction cylinder, the verifying attachment of realizing this method comprises frame, cushion block 6 gentle camels 7, the rodless cavity side that described gas suspension to be tested does not have the friction cylinder vertically is fixed on the frame, described cushion block 6 is fixed on the end that does not have the friction cylinder piston rod, described air supporting pad 7 is installed in the cushion block upper surface, described air supporting pad 7 is installed on the elevating mechanism and is concentric with described cushion block 6, described air supporting pad 7 is positioned on the described cushion block 6 and air-flotation type connection between the two, described elevating mechanism is installed on the frame, described elevating mechanism is provided with air supporting pad air supply opening 1, and described support is provided with the air intake opening 9 that does not have the friction cylinder;
The described method of inspection comprises the steps:
(1) there is not friction cylinder air feed to air supporting pad and gas suspension, cushion block moves vertically with cylinder piston, is issued to stable state in the effect of air supporting pad, has the gap between air supporting pad and cushion block, form air film in the gap, have the effect of power between air supporting pad and the cushion block but do not have friction force;
(2) rotating piston bar if do not have friction force between piston and the cylinder barrel, only is subjected to air resistance, and piston can stop slowly, comes the position of control piston in cylinder barrel to carry out the detection of further friction force by the position of adjusting the air supporting pad again; In the piston rotary course, if speed obviously descends, then illustrate between piston and cylinder barrel to have frictional resistance.
Described frame comprises base 2 and two supports 10, and described elevating mechanism comprises moving beam 8, ball-screw, feed screw nut seat, line slideway and line slideway seat.Certainly, also can adopt other elevating mechanisms.
The verifying attachment of present embodiment comprises cushion block 6, air supporting pad 7, moving beam 8, adjustment support 10, base 2.Described gas suspension to be tested does not have the friction cylinder and is fixed on the base 2, described cushion block 6 is fixed on the end that does not have friction cylinder piston rod 5, described air supporting pad 7 is installed on the moving beam 8, described moving beam 8 is adjusted on the support 10 by being bolted to, described moving beam 8 can be adjusted the position at adjustment support 10, described cushion block 6 overlaps with air supporting pad 7 centers, and described gas suspension does not have the friction cylinder by bottom air inlet 1 air feed, and described air supporting pad 7 is by air intake opening 9 air feed on the moving beam 8.
The course of work of present embodiment is: do not have friction cylinder air feed to air supporting pad 7 and gas suspension, cushion block 6 moves vertically with cylinder piston, effect at air supporting pad 7 is issued to stable state, there are minimum gap in 6 of air supporting pad 7 and cushion blocks, form air film in the gap, have the effect of power between air supporting pad and the cushion block but do not have friction force.Rotating piston bar 5 if do not have friction force between piston 4 and the cylinder barrel 3, only is subjected to air resistance, and piston 4 can stop slowly, comes the position of control piston 4 in cylinder barrel 3 to carry out the detection of further friction force by the position of adjusting air supporting pad 7 again.In piston 4 rotary courses, if speed obviously descends, illustrate that then there are frictional resistance in 3 of piston 4 and cylinder barrels.
Described moving beam 8 two ends also can be fixed with slide block, slide at linear guides by slide block and adjust the position of air supporting base, perhaps adjust by other means.
Described air supporting pad 7 is circle air supporting pad, also can adopt the air supporting pad of other types.
Claims (1)
1. a gas suspension does not have the method for inspection of friction cylinder, it is characterized in that: the verifying attachment of realizing this method comprises frame, the gentle camel of cushion block, the rodless cavity side that described gas suspension to be tested does not have the friction cylinder vertically is fixed on the frame, described cushion block is fixed on the end that does not have the friction cylinder piston rod, described air supporting pad is installed in the cushion block upper surface, described air supporting pad is installed on the elevating mechanism and is concentric with described cushion block, described air supporting pad is positioned on the described cushion block and air-flotation type connection between the two, described elevating mechanism is installed on the frame, described elevating mechanism is provided with air supporting pad air supply opening, and described support is provided with the air intake opening that does not have the friction cylinder;
The described method of inspection comprises the steps:
(1) there is not friction cylinder air feed to air supporting pad and gas suspension, cushion block moves vertically with cylinder piston, is issued to stable state in the effect of air supporting pad, has the gap between air supporting pad and cushion block, form air film in the gap, have the effect of power between air supporting pad and the cushion block but do not have friction force;
(2) rotating piston bar if do not have friction force between piston and the cylinder barrel, only is subjected to air resistance, and piston can stop slowly, comes the position of control piston in cylinder barrel to carry out the detection of further friction force by the position of adjusting the air supporting pad again; In the piston rotary course, if speed obviously descends, then illustrate between piston and cylinder barrel to have frictional resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310123828.1A CN103234667B (en) | 2013-04-10 | 2013-04-10 | A kind of gas suspension is without the method for inspection of friction cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310123828.1A CN103234667B (en) | 2013-04-10 | 2013-04-10 | A kind of gas suspension is without the method for inspection of friction cylinder |
Publications (2)
| Publication Number | Publication Date |
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| CN103234667A true CN103234667A (en) | 2013-08-07 |
| CN103234667B CN103234667B (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310123828.1A Active CN103234667B (en) | 2013-04-10 | 2013-04-10 | A kind of gas suspension is without the method for inspection of friction cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940599A (en) * | 2014-04-14 | 2014-07-23 | 浙江大学 | Pneumatic muscle/air cylinder integrated test system |
| CN110333055A (en) * | 2019-06-17 | 2019-10-15 | 江苏大学 | A kind of friction sensing device and method of air bearing friction-free air cylinder |
| CN112097979A (en) * | 2020-08-28 | 2020-12-18 | 清华大学 | Method for measuring motion resistance of hydraulic cylinder of driving mechanism |
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| US4763508A (en) * | 1985-10-12 | 1988-08-16 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Method for determining the friction torque of a test bearing |
| US5501114A (en) * | 1993-09-28 | 1996-03-26 | National Aerospace Laboratory Of Science & Technology | Three-dimensional free motion apparatus |
| CN101858814A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for measuring parasitic frictional resistance of electric dynamometer of chassis in gliding way |
| CN102062125A (en) * | 2009-11-17 | 2011-05-18 | 上海微电子装备有限公司 | Air type position compensation device |
| CN102226948A (en) * | 2011-05-19 | 2011-10-26 | 张瑞杰 | Leveling system of floating cylinder |
| CN202807110U (en) * | 2012-08-14 | 2013-03-20 | 淮安中科科创精密机械科技有限公司 | Gas floating six-degree-of-freedom simulation satellite device of semi-active type gravity compensation structure |
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2013
- 2013-04-10 CN CN201310123828.1A patent/CN103234667B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763508A (en) * | 1985-10-12 | 1988-08-16 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Method for determining the friction torque of a test bearing |
| US5501114A (en) * | 1993-09-28 | 1996-03-26 | National Aerospace Laboratory Of Science & Technology | Three-dimensional free motion apparatus |
| CN102062125A (en) * | 2009-11-17 | 2011-05-18 | 上海微电子装备有限公司 | Air type position compensation device |
| CN101858814A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for measuring parasitic frictional resistance of electric dynamometer of chassis in gliding way |
| CN102226948A (en) * | 2011-05-19 | 2011-10-26 | 张瑞杰 | Leveling system of floating cylinder |
| CN202807110U (en) * | 2012-08-14 | 2013-03-20 | 淮安中科科创精密机械科技有限公司 | Gas floating six-degree-of-freedom simulation satellite device of semi-active type gravity compensation structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940599A (en) * | 2014-04-14 | 2014-07-23 | 浙江大学 | Pneumatic muscle/air cylinder integrated test system |
| CN103940599B (en) * | 2014-04-14 | 2016-10-19 | 浙江大学 | Pneumatic muscles/cylinder integrated test system |
| CN110333055A (en) * | 2019-06-17 | 2019-10-15 | 江苏大学 | A kind of friction sensing device and method of air bearing friction-free air cylinder |
| CN110333055B (en) * | 2019-06-17 | 2020-12-29 | 江苏大学 | Friction detection device and method for air-floatation friction-free air cylinder |
| CN112097979A (en) * | 2020-08-28 | 2020-12-18 | 清华大学 | Method for measuring motion resistance of hydraulic cylinder of driving mechanism |
| CN112097979B (en) * | 2020-08-28 | 2021-07-13 | 清华大学 | Method for measuring motion resistance of hydraulic cylinder of driving mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103234667B (en) | 2015-08-12 |
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Effective date of registration: 20200317 Address after: 213000 Sanhekou Industrial Park, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province Patentee after: CHANGZHOU JIAFA GRANULATING DRYING EQUIPMENT Co.,Ltd. Address before: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20200317 Address after: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: The city Zhaohui six districts Chao Wang Road Hangzhou City, Zhejiang province 310014 18 Patentee before: ZHEJIANG UNIVERSITY OF TECHNOLOGY |
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