CN103245493B - Bending moment resistance testing device for frictionless cylinder - Google Patents
Bending moment resistance testing device for frictionless cylinder Download PDFInfo
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- CN103245493B CN103245493B CN201310124912.5A CN201310124912A CN103245493B CN 103245493 B CN103245493 B CN 103245493B CN 201310124912 A CN201310124912 A CN 201310124912A CN 103245493 B CN103245493 B CN 103245493B
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- ferromagnet
- friction cylinder
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- frame
- bending resistance
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Abstract
The invention provides a bending moment resistance testing device for a frictionless cylinder. The bending moment resistance testing device comprises a frame, a ferromagnet, a flotation pad, an electromagnet and a force sensor, wherein the rodless cavity side of the frictionless cylinder is fixed on the frame; a piston rod of the frictionless cylinder is placed upwards; the ferromagnet is mounted at the upper end of the piston rod in a sleeving way; the flotation pad is mounted on a lifting mechanism and concentric with the ferromagnet; the flotation pad is positioned on the ferromagnet, and the flotation pad and the ferromagnet are in air floating connection therebetween; the lifting mechanism is mounted on the frame; the electromagnet is connected with the force sensor; the force sensor is connected with the lifting mechanism; the electromagnet is just opposite to the ferromagnet; a flotation pad air feeding port is formed in the lifting mechanism; and an air inlet hole of the frictionless cylinder is formed in a base. According to the invention, the force loading mechanism is not contacted with the piston rod directly, so that dynamic measurement is realized, detection accuracy is high, and operation is convenient.
Description
Technical field
The present invention relates to a kind of without friction cylinder field tests, especially a kind of without friction cylinder bending resistance detection field.
Background technology
Along with modern industry and high-tech develop rapidly, gas bearing technology is used widely, and it replaces oil as lubricant with gas, forms air film, make active face and stationary face avoid the desirable supporting member directly contacted between axle and bearing holder (housing, cover).
Gas lubrication technology is realizing zero friction cylinder is also applied, minimum gap is left between cylinder barrel and piston, 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 be in complete suspended state in the cylinder, piston does not contact each other with cylinder barrel, thus eliminates the friction force in air cylinder structure between piston and cylinder barrel.
Certain radial load is born in piston rod one end, can produce moment of flexure thus the direct formation affecting air film between piston and cylinder barrel, when load acquires a certain degree, can make seizure of piston in cylinder barrel.Different application field requires different to the bending resistance without friction cylinder piston, therefore it is indispensable for carrying out test to the bending resistance without friction cylinder, if directly add a radial load at piston-rod end, bending resistance when being in static state without friction cylinder can only be tested, in fact bending resistance when piston is positioned at any one position of cylinder barrel is different, and dynamic motion is in without friction cylinder in engineering practice process, there is no a kind of easy to operate, that testing accuracy is high testing standard and testing tool in current industry.
Summary of the invention
The deficiency of bending resistance when being positioned at cylinder barrel diverse location without friction cylinder piston cannot be gone out by Validity Test to overcome in prior art, the invention provides that a kind of power load maintainer directly contact with piston rod, nothing that kinetic measurement, accuracy of detection are high, easy to operate rubs cylinder bending resistance proving installation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of without friction cylinder bending resistance proving installation, described bending resistance proving installation comprises frame, ferromagnet, floating cushion, electromagnet and force snesor, the described rodless cavity side without friction cylinder is fixed in frame, the described piston rod without friction cylinder is in upwards arranging, described ferromagnet is sleeved on the upper end of described piston rod, described floating cushion to be arranged on elevating mechanism and concentric with described ferromagnet, described floating cushion is positioned on described ferromagnet and air-flotation type connects between the two, described elevating mechanism is arranged in frame, described electromagnet is connected with force snesor, described force snesor is connected with described elevating mechanism, described electromagnet and described ferromagnet just right, 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 moving beam has floating cushion air supply opening, described base has the air admission hole without friction cylinder.Certainly, other elevating mechanism also can be selected to realize.
Further, described electromagnet is connected with the electromagnetic force adjustment module in order to change electromagnetic force by adjusting size of current.
Described ferromagnet is pig iron head.Also can adopt other can the ferromagnet that holds by magnet.
Technical conceive of the present invention is: moving beam is provided with floating cushion, be arranged between the ferromagnet of piston rod upper end and floating cushion and pass through gas lubrication, friction force is there is not during relative motion, ball-screw drives moving beam to move up and down, control the position of floating cushion, cylinder ventilation back piston can reach suspended state in cylinder barrel.The electromagnet of belt coil is fixed by web member and moving beam, electromagnetic force along piston rod radial direction is produced on ferromagnet when passing into electric current, turn the piston rod of motive friction-free cylinder, regulating magnet passes into the size of electric current, owing to only there is air resistance by gas lubrication between piston and cylinder barrel, but when the electromagnetic force acting on piston-rod end constantly increases, when reaching capacity, piston card to be parked in cylinder barrel and to record the numerical value of now force snesor and the position residing for piston, can obtain piston and be positioned at the maximal bending moment that current location allows.
This programme make use of magnetic force principle to realize, described ferromagnet refers to the material of the strong complementary field that generation is identical with external magnetic field under magnetic fields, described ferromagnet comprises iron-cobalt-nickel etc., attract after its magnetic force that can be produced by electromagnet, the electromagnet of described belt coil can change the size of magnetic force by changing the size passing into electric current.
This proving installation is only applicable to air supporting that aluminum alloy materials etc. do not affect by electromagnet without friction cylinder.
Beneficial effect of the present invention is mainly manifested in: kinetic measurement, accuracy of detection are high, easy to operate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram without friction cylinder bending resistance proving installation.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1, a kind of without friction cylinder bending resistance proving installation, described bending resistance proving installation comprises frame, ferromagnet 10, floating cushion 11, electromagnet 19 and force snesor 18, the described rodless cavity side without friction cylinder is fixed in frame, the described piston rod without friction cylinder is in upwards arranging, described ferromagnet 10 is sleeved on the upper end of described piston rod, described floating cushion 11 to be arranged on elevating mechanism and concentric with described ferromagnet 10, described floating cushion 11 is positioned on described ferromagnet 10 and air-flotation type connects between the two, described elevating mechanism is arranged in frame, described electromagnet 19 is connected with force snesor 18, described force snesor 18 is connected with described elevating mechanism, described electromagnet 19 is just right with described ferromagnet 10, described elevating mechanism is provided with floating cushion air supply opening, described support is provided with the air admission hole without friction cylinder.
Described ferromagnet 10 is pig iron head.Also can adopt other can the ferromagnet that holds by magnet.
The nothing friction cylinder bending resistance proving installation of the present embodiment, comprises floating cushion 11, moving beam 15, electromagnet 19, force snesor 18, pig iron head, ball-screw 8, line slideway 14, support 9, base 20, motor 1, shaft coupling 2 and bearing seat 13.
The described center being upwards fixed on base 20 without friction cylinder piston rod, described pig iron headgear is contained in the end without friction cylinder piston rod 7, described floating cushion 11 is arranged on the center of moving beam 15 and concentric with pig iron head 10, be provided with force snesor 18 after described electromagnet 19 and fixed by web member 17 and moving beam 15, described electromagnet 19 produces the power along piston rod 7 radial direction and acts on pig iron head.With or without the air admission hole 3 of friction cylinder on described base 20, described moving beam 15 there is floating cushion air supply opening.
Described support 9 has two and is vertically fixed on base 20, described ball-screw 8 two ends are fixed on support 9 by bearing seat 13, described line slideway 14 is arranged on another support by holder 4, described moving beam 15 two ends are fixed with ball screw and line slideway respectively by ball-screw nut seat 12 and straight line guide rail seat 16, and described motor 1 is connected with ball screw by shaft coupling 2.
The position of adjustment residing for moving beam 15, then respectively to floating cushion 11 with without friction cylinder air feed, producing mutual acting force between piston rod 7 and floating cushion makes piston 6 be in equilibrium state, friction force is there is not by gas lubrication between floating cushion 11 and pig iron head, rotary-piston bar 7 makes it rotate with certain speed, power to electromagnet 19 and continue to increase electric current, the electromagnetic force acted on pig iron head constantly increases, when reaching capacity, piston 6 card to be parked in cylinder barrel 5 and to record the numerical value of now force snesor, position again residing for piston 6 accurately can calculate the moment of flexure size now acted on the piston rod.
The proving installation of the present embodiment is only applicable to air supporting that aluminum alloy materials etc. do not affect by electromagnet without friction cylinder.
Claims (4)
1. a nothing friction cylinder bending resistance proving installation, it is characterized in that: described bending resistance proving installation comprises frame, ferromagnet, floating cushion, electromagnet and force snesor, the described rodless cavity side without friction cylinder is fixed in frame, the described piston rod without friction cylinder is in upwards arranging, described ferromagnet is sleeved on the upper end of described piston rod, described floating cushion to be arranged on elevating mechanism and concentric with described ferromagnet, described floating cushion is positioned on described ferromagnet and air-flotation type connects between the two, described elevating mechanism is arranged in frame, described electromagnet is connected with force snesor, described force snesor is connected with described elevating mechanism, described electromagnet and described ferromagnet just right, described elevating mechanism is provided with floating cushion air supply opening, described frame is provided with the air admission hole without friction cylinder.
2. as claimed in claim 1 without friction cylinder bending resistance proving installation, 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 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 moving beam has floating cushion air supply opening, described base has the air admission hole without friction cylinder.
3. as claimed in claim 1 or 2 without friction cylinder bending resistance proving installation, it is characterized in that: described electromagnet is connected with the electromagnetic force adjustment module in order to change electromagnetic force by adjusting size of current.
4. the nothing friction cylinder bending resistance proving installation described in claim 1 or 2, is characterized in that: described ferromagnet is pig iron head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124912.5A CN103245493B (en) | 2013-04-10 | 2013-04-10 | Bending moment resistance testing device for frictionless cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124912.5A CN103245493B (en) | 2013-04-10 | 2013-04-10 | Bending moment resistance testing device for frictionless cylinder |
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| Publication Number | Publication Date |
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| CN103245493A CN103245493A (en) | 2013-08-14 |
| CN103245493B true CN103245493B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310124912.5A Active CN103245493B (en) | 2013-04-10 | 2013-04-10 | Bending moment resistance testing device for frictionless cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104677592B (en) * | 2015-03-14 | 2017-04-05 | 山西潞安环保能源开发股份有限公司 | Local ground watering flow field Three Dimensional Dynamic Simulation testing stand |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2135968C1 (en) * | 1997-07-23 | 1999-08-27 | Открытое акционерное общество "Саратовский подшипниковый завод" | Instrument measuring moment of resistance of bearing to rotation |
| CN102620925B (en) * | 2012-04-12 | 2014-05-28 | 杭州电子科技大学 | Device and method for measurement testing of load of valve rocker of engine valve mechanism |
| CN102980703B (en) * | 2012-11-29 | 2014-07-30 | 重庆理工大学 | Method and device for testing dynamic pressing force of clutch release bearing of automobile |
| CN103016442B (en) * | 2012-12-31 | 2015-12-30 | 浙江工业大学 | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder |
| 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 |
| CN103016441B (en) * | 2012-12-31 | 2015-02-18 | 浙江工业大学 | Air flotation cylinder for forming stable air film by microporous material |
| CN203275068U (en) * | 2013-04-10 | 2013-11-06 | 浙江工业大学 | Test device for testing bending resistance of frictionless cylinder |
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Effective date of registration: 20181220 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: 20201124 Address after: 244000 Huayuan Road, Tongling, Anhui, No. 192 on the first floor Patentee after: Tongling Hailin Management Consulting Co.,Ltd. Address before: 401120 No. 7, East Airport Road, Shuangfengqiao Street, Yubei District, Chongqing Patentee before: Chongqing Brilliant Aluminum Furniture Co.,Ltd. |