CN103234899B - A detection device for a high-precision air-levitated friction-free cylinder - Google Patents
A detection device for a high-precision air-levitated friction-free cylinder Download PDFInfo
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- CN103234899B CN103234899B CN201310124084.5A CN201310124084A CN103234899B CN 103234899 B CN103234899 B CN 103234899B CN 201310124084 A CN201310124084 A CN 201310124084A CN 103234899 B CN103234899 B CN 103234899B
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Abstract
A detection device for a high-precision air-levitated friction-free cylinder comprises a rack, a cushion block, an air-levitated pad and a non-contact angle encoder. The non-contact angle encoder includes a code disk, a reading head and a reading head seat, the reading head is mounted on the reading head seat, the reading head is directed to an indication scale of the code disk, the rodless side of the to be tested air-levitated friction-free cylinder is vertically fixed on the rack, the cushion block is fixed on the end of the piston rod of the friction-free cylinder, the code disk of an angle sensor assembly is mounted on the upper surface of the cushion block, the air-levitated pad is arranged on a lifting mechanism and is concentric with the cushion block, the air-levitated pad is located on the code disc and is in air-levitated connection with the code disc, the lifting mechanism is arranged on the rack, air feed port for the air-levitated pad is disposed on the lifting mechanism, and an air inlet of the friction-free cylinder is arranged on a support. The device of the invention can detect whether friction exists between the piston and a cylinder barrel in the friction-free cylinder, and the precision is high.
Description
Technical field
The present invention relates to friction force check field, especially a kind of gas suspension is without friction Pneumatic Cylinder with Friction verifying attachment.
Background technology
Along with modern industry and high-tech develop rapidly, gas bearing technology is used widely, and it is to replace oil as lubricant with gas, between axle and bearing holder (housing, cover), forms air film, makes active face and stationary face avoid the desirable supporting member directly contacting.Gas lubrication technology is also applied on realization zero friction cylinder, between cylinder barrel and piston, leave minimum gap, and the throttle orifice of even distribution is set on piston radial, pressurized air in employing cylinder self cavity volume is as lubricant, gas is introduced in gap, make piston in cylinder in complete suspended state, piston do not contact each other with cylinder barrel, thereby eliminated the friction force between piston and cylinder barrel in air cylinder structure.
Gas suspension has very high requirement on machining accuracy without friction cylinder, to manufactured gas suspension, without friction cylinder, will carry out the check of friction force.For common air bearing, can if do not exist in friction force between air-bearing shafts and air supporting cover, only be subject to air resistance along axial-rotation air-bearing shafts or air supporting cover, air-bearing shafts or the air supporting cover of rotation can stop slowly.But without friction cylinder, piston all needs to carry out the check of friction force during any position in cylinder barrel, meets friction free requirement for gas suspension.After cylinder ventilation, because piston is stressed, move axially, at piston rod axial direction, need apply a power and come balance piston position, if adopt counterweight to be fixed on the end of piston rod, rotary-piston bar carries out friction force check, inertia force influence while rotating because of counterweight is far longer than air resistance and friction force, can not meet testing requirement, and does not have effective method to come the position of control piston in cylinder barrel.
Summary of the invention
In order overcoming in prior art, cannot to realize gas suspension without the problem of friction Pneumatic Cylinder with Friction check, to the invention provides a kind of gas suspension of can effectively measuring without the verifying attachment that whether exists the high-precision gas suspension of friction force without 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 high-precision gas suspension is without the verifying attachment of friction cylinder, comprise frame, cushion block, floating cushion and Non-contact angle scrambler, described Non-contact angle scrambler comprises code-disc, read head and reading headstock, described read head is arranged on reading headstock, described read head points to the indicating graduation of described code-disc, described gas suspension to be tested is vertically fixed in frame without the rodless cavity side of friction cylinder, described cushion block is fixed on the end without friction cylinder piston rod, the code-disc of described angle inductive component is arranged on cushion block upper surface, described floating cushion is arranged on elevating mechanism and is concentric with described cushion block, described floating cushion is positioned on described code-disc and air-flotation type connection between the two, described elevating mechanism is arranged in frame, described elevating mechanism is provided with floating cushion air supply opening, described support is provided with the air admission hole without friction cylinder.
Further, described frame comprises base and two supports, described elevating mechanism comprises moving beam, ball-screw, feed screw nut seat, line slideway and straight line guide rail seat, described two supports are vertically fixed on base, described ball-screw two ends are fixed therein on a support by bearing seat, described line slideway is arranged on another support by holder, described moving beam one end is connected with ball-screw nut seat, described feed screw nut cover for seat is contained on described ball-screw, the other end of described mobile moving beam is connected with described straight line guide rail seat, described straight line guide rail seat is sleeved on described line slideway, motor is connected with ball screw by shaft coupling, described floating cushion and reading headstock are arranged on described moving beam, on described moving beam, have floating cushion air supply opening, on described base, have the air admission hole without friction cylinder.Certainly, also can select other elevating mechanism to realize.
Further, described floating cushion is circle floating cushion, also can adopt the floating cushion of other types.
Technical conceive of the present invention is: between the cushion block of floating cushion and piston-rod end by gas lubrication, during relative motion, there is not friction force, the cushion block of cylinder ventilation back piston bar end is under the effect of floating cushion, in cylinder barrel, can reach the state of suspension, and floating cushion is fixed on air supporting base can adjust position on adjusting pole, by rotating piston bar, check gas suspension whether to have friction force without friction cylinder.
The air feed of floating cushion and Non-contact angle scrambler and wiring do not affect the motion of piston.Speed time curve when can accurately obtain piston rotation by Non-contact angle scrambler, can check gas suspension whether to have friction force without friction cylinder by the contrast with typical curve, and testing accuracy is high.
Beneficial effect of the present invention is mainly manifested in: effectively measure gas suspension without whether existing friction force, testing accuracy high between friction piston and cylinder barrel.
Accompanying drawing explanation
Fig. 1 is that high-precision gas suspension is without the verifying attachment of friction cylinder.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1, a kind of high-precision gas suspension is without the verifying attachment of friction cylinder, comprise frame, cushion block 8, floating cushion 18 and Non-contact angle scrambler, described Non-contact angle scrambler comprises code-disc 9, read head and reading headstock 10, described read head is arranged on reading headstock 10, described read head points to the indicating graduation of described code-disc 9, described gas suspension to be tested is vertically fixed in frame without the rodless cavity side of friction cylinder, described cushion block 8 is fixed on the end without friction cylinder piston rod, the code-disc of described angle inductive component is arranged on cushion block 8 upper surfaces, described floating cushion 18 is arranged on elevating mechanism and is concentric with described cushion block 8, described floating cushion 18 is positioned on described code-disc 9 and air-flotation type connection between the two, described elevating mechanism is arranged in frame, described elevating mechanism is provided with floating cushion air supply opening 17, described support is provided with the air admission hole 4 without friction cylinder.
Further, described frame comprises base 1 and two supports 13, and described elevating mechanism comprises moving beam 19, ball-screw 12, feed screw nut seat 11, line slideway 15 and straight line guide rail seat 16.Certainly, also can adopt other elevating mechanisms.
The high-precision gas suspension of the present embodiment is without the verifying attachment of friction cylinder, comprise cushion block 8, floating cushion 18, moving beam 19, Non-contact angle scrambler, ball-screw 12, line slideway 15, motor 2, shaft coupling 3, base 1, described Non-contact angle scrambler comprises code-disc 9, read head and reading headstock 10.Described gas suspension to be tested is vertically fixed on base 1 without friction cylinder, described cushion block 8 is fixed on the end without friction cylinder piston rod 7, described floating cushion 18 is arranged on moving beam 19 center, the center superposition of described cushion block 8 and floating cushion 18, the code-disc 9 of described angle inductive component is arranged on the upper surface of cushion block 8, described reading headstock 10 is fixed on moving beam 19, described read head is arranged on reading headstock, the air admission hole 4 that has or not the cylinder that rubs on described base, has floating cushion air supply opening 17 on described moving beam.
Preferably, described support 13 has two and be vertically fixed on base 1, described ball-screw 12 two ends are fixed on support 13 by bearing seat 14, described line slideway 15 is arranged on another support by holder 20, described moving beam 19 two ends are fixing with ball screw 12 and line slideway 15 by ball-screw nut seat 11 and straight line guide rail seat 16 respectively, and described motor 2 is connected with ball screw 12 by shaft coupling 3.
Give respectively floating cushion 18 and gas suspension without friction cylinder air feed, by ball-screw 12, control the position that floating cushion 18 moves up and down, cushion block 8 moves vertically with cylinder piston, effect at floating cushion 18 is issued to stable state, there is minimum gap in 8 of floating cushion and cushion blocks, in gap, form air film, between floating cushion and cushion block, have the effect of power but do not have friction force.Rotating piston bar 7 is given an one initial velocity, if there is not friction force between piston 6 and cylinder barrel 5, only be subject to air resistance, piston 6 can stop very slowly, the data that Non-contact angle scrambler is measured send external computer system to, the curve of velocity attenuation while rotating by calculating piston, by adjusting the position of floating cushion 18, come the position of control piston 6 in cylinder barrel 5 to carry out the detection of further friction force again, if there is friction force between piston 6 and cylinder barrel 5, under identical starting velocity, rate curve there will be quick relaxation phenomenon, surpass error range with typical curve contrast, computer system meeting automatic alarm, described gas suspension is undesirable without friction cylinder.
Described floating cushion 18 is circle floating cushion, certainly, also can adopt the floating cushion of other types.
In the present embodiment, the air feed of floating cushion 18 and Non-contact angle scrambler and wiring do not affect the motion of piston.Speed time curve when can accurately obtain piston rotation by Non-contact angle scrambler, can check gas suspension whether to have friction force without friction cylinder by the contrast with typical curve, and testing accuracy is high.
Claims (3)
1. a high-precision gas suspension is without the verifying attachment of friction cylinder, it is characterized in that: comprise frame, cushion block, floating cushion and Non-contact angle scrambler, described Non-contact angle scrambler comprises code-disc, read head and reading headstock, described read head is arranged on reading headstock, described read head points to the indicating graduation of described code-disc, gas suspension to be tested is vertically fixed in frame without the rodless cavity side of friction cylinder, described cushion block is fixed on gas suspension without the end of friction cylinder piston rod, the code-disc of described Non-contact angle scrambler is arranged on cushion block upper surface, described floating cushion is arranged on elevating mechanism and is concentric with described cushion block, described floating cushion is positioned on described code-disc and air-flotation type connection between the two, described elevating mechanism is arranged in frame, described elevating mechanism is provided with floating cushion air supply opening, described frame is provided with gas suspension without the air admission hole of friction cylinder.
2. high-precision gas suspension as claimed in claim 1 is without the verifying attachment of friction cylinder, it is characterized in that: described frame comprises base and two supports, described elevating mechanism comprises moving beam, ball-screw, feed screw nut seat, line slideway and straight line guide rail seat, described two supports are vertically fixed on base, described ball-screw two ends are fixed therein on a support by bearing seat, described line slideway is arranged on another support by holder, described moving beam one end is connected with feed screw nut seat, described feed screw nut cover for seat is contained on described ball-screw, the other end of described moving beam is connected with described straight line guide rail seat, described straight line guide rail seat is sleeved on described line slideway, motor is connected with ball screw by shaft coupling, described floating cushion and reading headstock are arranged on described moving beam, on described moving beam, have floating cushion air supply opening, on described base, have gas suspension without the air admission hole of friction cylinder.
3. high-precision gas suspension as claimed in claim 1 or 2, without the verifying attachment of friction cylinder, is characterized in that: described floating cushion is circle floating cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124084.5A CN103234899B (en) | 2013-04-10 | 2013-04-10 | A detection device for a high-precision air-levitated friction-free cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124084.5A CN103234899B (en) | 2013-04-10 | 2013-04-10 | A detection device for a high-precision air-levitated friction-free cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN103234899A CN103234899A (en) | 2013-08-07 |
| CN103234899B true CN103234899B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310124084.5A Active CN103234899B (en) | 2013-04-10 | 2013-04-10 | A detection device for a high-precision air-levitated friction-free cylinder |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110333055B (en) * | 2019-06-17 | 2020-12-29 | 江苏大学 | Friction detection device and method for air-floatation friction-free air cylinder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2500366B2 (en) * | 1993-09-28 | 1996-05-29 | 科学技術庁航空宇宙技術研究所長 | Three-dimensional free movement device |
| CN103016443B (en) * | 2012-12-31 | 2015-08-12 | 浙江工业大学 | A kind of gas suspension with pressure relief groove is without friction cylinder |
| CN103016444B (en) * | 2012-12-31 | 2015-02-25 | 浙江工业大学 | Air-suspending friction-free air cylinder with cylinder barrels for air supply |
| CN203272340U (en) * | 2013-04-10 | 2013-11-06 | 浙江工业大学 | High-precision inspection device for air-suspending friction-free air cylinder |
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Effective date of registration: 20181221 Address after: 401120 No. 7, East Airport Road, Shuangfengqiao Street, Yubei District, Chongqing Patentee after: Chongqing Brilliant Aluminum Furniture Co., Ltd. Address before: 310014 18 Chao Wang Road, Zhaohui six District, Hangzhou, Zhejiang Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20201111 Address after: No. ZC030, College Students Pioneer Park, Tongling City, Anhui Province, 244000 Patentee after: TONGLING HUIHENG ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 401120 No. 7, East Airport Road, Shuangfengqiao Street, Yubei District, Chongqing Patentee before: Chongqing Brilliant Aluminum Furniture Co.,Ltd. |