CN104676243B - Classified gas-inflating method for gas spring and tool for method - Google Patents
Classified gas-inflating method for gas spring and tool for method Download PDFInfo
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- CN104676243B CN104676243B CN201510130481.2A CN201510130481A CN104676243B CN 104676243 B CN104676243 B CN 104676243B CN 201510130481 A CN201510130481 A CN 201510130481A CN 104676243 B CN104676243 B CN 104676243B
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Abstract
The invention discloses a classified gas-inflating method for a gas spring and tool for the method. Gas is inflated by a gap between a guide sleeve at the front end of the gas spring and a piston rod, and an air inflation hole is formed in an end cap at the rear end of the gas spring. The classified gas-inflating method is characterized in that gas is inflated in a way of multi-stage gas inflating and the gas inflating pressure is gradually raised. The tool for the classified gas-inflating method for the gas spring comprises a base, wherein a gas inflating seat and a limiting plate are correspondingly arranged on the base, a supporting block is arranged between the gas inflating seat and the limiting plate, a gas inflating chamber matched with the front end of the gas spring is formed on the gas inflating seat, sealing elements are mounted at the front and rear openings of the gas inflating chamber, a gas inlet communicated with the gas inflating chamber is formed in the gas inflating base, the gas inlet is connected with a low pressure gas source, a middle pressure gas source and a high pressure gas source through pipelines. The piston rod is just pulled out during gas inflating without being fixed, so that the production efficiency is improved. After gas inflating, the force value of the product is small in fluctuation and stable. No gas inflating holes are available in the end cap at the rear end of the gas spring, so that the quality potential quality hazard of hidden leakage is avoided.
Description
Technical field
The invention belongs to gas spring inflation technical field, more particularly to a kind of gas spring classification inflation method.
Background technology
Gas spring is a kind of automotive industry accessories that can play the functions such as support, buffering, is a kind of flexible member, and its is main
Structure includes the parts such as cylinder barrel 5, piston rod sub-unit, fairlead 2, sealing gland 3 and spacer 4, and wherein piston rod sub-unit includes living
Stopper rod 1 and piston, referring to Fig. 1.Its principle is that noble gases or gas mixture are filled with closed cylinder barrel, is made in cavity
Several times or tens times of pressure superatmospheric, the sectional area using piston both sides is different（One is terminated with piston rod and another
One end does not have）The motion of piston rod is realized so as to produce pressure differential.Due to being provided with through hole, piston two ends gas in internal piston
Pressure is equal, and the sectional area of piston both sides is different, and the pressure to the little side of sectional area is produced under gas pressure effect（I.e.
The elastic force of strut）, the size of elastic force can realize by arranging different the blowing pressures.
Existing gas spring inflation method is roughly divided into two kinds on market：Inflate and rear end inflation front end.
（1）Inflate front end：High pressure nitrogen is entered from the gap between the fairlead 2 and piston rod 1 in gas spring cylinder nozzle portion,
Because sealing gland inner lip 6 is shaped like in check valve, when high pressure nitrogen pressure is more than sealing gland enclasping force its inner lip 6 is pushed open
Into inside cylinder barrel, reach and stop after authorized pressure and pressurize inflation, complete the gas replenishment process to whole gas spring, such as Fig. 2 and
Shown in Fig. 3.
The shortcoming that this front end airing form is present mainly have it is following some：
A. the blowing pressure will be by factors such as sealing gland and piston rod fit dimension, sealing gland lip shape, sealing gland enclasping forces
Affect, linear loss is larger when causing gas to be filled with, and be difficult to control, cause gas spring force fluctuation range after inflation larger
（±50N）.
B. inflate the initial stage, because cylinder barrel inside and outside differential pressure causes piston rod to be pressed into inside cylinder barrel, have to before inflation by
Piston rod is pulled out and fixed, and causes production efficiency relatively low.
（2）Inflate rear end：Air-filled pore is opened up on the plug 7 of gas spring cylinder barrel afterbody, and gas is assembled in air-filled pore and blocked up
8, high pressure nitrogen is entered inside cylinder barrel from the gap that the air-filled pore of plug 7 coordinates with gas stifled 8, treats that it reaches authorized pressure and protects
After pressure, gas in cylinder barrel is sealed in the air-filled pore of the interference part press-in plug 7 that gas stifled 8 is exposed, completed to whole
The gas replenishment process of gas spring, as shown in Figure 4 and Figure 5.
The shortcoming that this rear end airing form is present mainly have it is following some：
A. air-filled pore on plug and, required precision little with the stifled size of gas that it coordinates are high, cause manufacturing cost high.
B. plug air-filled pore aperture is φ 1.8, and its difficulty of processing is big, is difficult the concordance and stability for ensureing its size,
And oval, the sealing effectiveness of impact gas spring is easily produced at aperture, the recessive leakage of gas is caused.
C. existing technological method for processing is it cannot be guaranteed that the roughness of plug inflation internal surface of hole, so may result in inflation
The Kong Yuqi stifled coarse generation gap of sealing mating surface, causes gas leakage.
D. existing inflatable structure can not carry out supplementary gas again after insufflation gas sealing, virtually make
Into increasing for waste product.
Therefore, how to solve above-mentioned technical problem becomes the direction of art personnel effort.
The content of the invention
It is an object of the invention to provide a kind of gas spring classification inflation method and its frock, can be fully solved above-mentioned existing
The weak point of technology.
The purpose of the present invention is realized by following technical proposals：
A kind of gas spring is classified inflation method, is filled by the gap between gas spring at front end fairlead and piston rod
Gas, without air-filled pore on the plug of gas spring rear end, it is characterised in that：It is inflated by the way of multi-stage inflatable, and inflating air
Pressure is raised step by step.
Preferably, first pulling out in the piston rod of gas spring, then carry out successively in first order low inflation, the second level
Pressure inflation and the third level are high-pressure aerated.
Preferably, the air pressure of the first order low inflation is 1～3MPa, inflationtime is 1～2s；Press in the second level
The air pressure of inflation is 3～10MPa, and inflationtime is 2～5s；The high-pressure aerated air pressure of the third level be 10～20MPa, inflationtime
For 2～4s.
A kind of frock that inflation method is classified for above-mentioned gas spring, including base, be correspondingly arranged on base inflating seat and
Limiting plate, be provided with support block between inflating seat and limiting plate, opens up on the inflating seat for matching with gas spring at front end
Plenum chamber, and sealing member is installed at plenum chamber front and back end portses, the air inlet connected with plenum chamber, air inlet are opened up on inflating seat
Low-pressure gas source, middle pressurized air source and high-pressure air source are connected respectively by pipeline.
Compared with prior art, the beneficial effects of the present invention is：
1. need to only pull out piston rod in inflation, it is not necessary to fixed, improve production efficiency.
2. the fluctuation of product force value is little after inflating（±20N）, it is stable.
3., without air-filled pore on the plug of gas spring rear end, the recessive hidden danger of quality revealed at plug air-filled pore has been prevented.
4. product purchasing cost is reduced.
5. can the product little to force value carry out supplementing gas, reduce percent defective, saved cost of goods manufactured.
Description of the drawings
Fig. 1 is the structural representation of prior art gas spring；
Fig. 2 is the structural representation of gas spring at front end inflation；
Fig. 3 is the partial enlarged drawing in Fig. 2 at A；
Fig. 4 is the structural representation of gas spring rear end inflation；
Fig. 5 is that the inflation of gas spring rear end is completed, the structural representation that gas is blocked up after press-in plug；
Fig. 6 is that gas spring of the present invention is fixed in frock the structural representation for carrying out multi-stage inflatable.
Specific embodiment
With reference to specific embodiments and the drawings, the present invention is further illustrated.
A kind of gas spring is classified inflation method, is filled by the gap between gas spring at front end fairlead and piston rod
Gas, without air-filled pore on the plug of gas spring rear end, it is characterised in that：It is inflated by the way of multi-stage inflatable, and inflating air
Pressure is raised step by step.
Comprise the following steps that：
Step one, first pulls out in the piston rod of gas spring, and gas spring is fixed on Aerated tool equipment, and before gas spring
End is placed in the plenum chamber of Aerated tool equipment；
Step 2, carries out first order low inflation, and air pressure is 1～3MPa, and inflationtime is 1～2s；
Step 3, carries out pressure inflation in the second level, and air pressure is 3～10MPa, and inflationtime is 2～5s；
Step 4, it is high-pressure aerated to carry out the third level, and air pressure is 10～20MPa, and inflationtime is 2～4s.
The inflation initial stage of above-mentioned classification gas replenishment process, cylinder barrel external pressure is higher than air pressure inside, and due to input is low pressure
Gas, piston rod is slowly pressed into inside cylinder barrel；At the same time, can be made rapidly inside cylinder barrel by continually entering for low-pressure gas
Air pressure is higher than external pressure, when piston rod is not also pressed into inside cylinder barrel completely, piston rod is released, to ensure follow-up inflation
During piston rod will not be pressed into inside cylinder barrel.The mid-term of gas replenishment process, needs with calming the anger in certain pressure, enough
Body is input into, and so just can guarantee that the gas pressure fluctuation range being filled with inside cylinder barrel is little, stable, high-pressure aerated establishes to follow-up
One stable good basis.In inflation latter stage, having possessed inside cylinder barrel has enough and has on the basis of certain pressure again
Gases at high pressure are further charged with, comparatively pressure reduction is less, gas pressure input is more quick, stable, so as to ensure to have inflated
Into stablizing for rear product force value.
The method of the classification inflation solves traditional gas spring at front end inflation low production efficiency, and product force value fluctuation range is big
Problem.Concretely, need to only pull out piston rod in inflation, it is not necessary to fixed, therefore improve production efficiency.Produce after inflation
The fluctuation of product force value is little and stable.Without air-filled pore on the plug of gas spring rear end, the recessive matter revealed at plug air-filled pore is prevented
Amount hidden danger.Because the sealing gland of gas spring is one-way valve structures, when product force value hour, can be being filled again after adjusting parameter
Gas, that is, pushing sealing gland inner lip open makes gas into inside cylinder barrel until product force value meets the requirements.
It is shown in Figure 6, a kind of frock that inflation method is classified for above-mentioned gas spring, including base 101, base 101
On be correspondingly arranged inflating seat 102 and limiting plate 103, support block 104 is provided between inflating seat 102 and limiting plate 103, it is described to fill
The plenum chamber 105 for matching with gas spring at front end is opened up on gas seat 102, and sealing is installed at the front and back end portses of plenum chamber 105
Part 106, opens up the air inlet 107 connected with plenum chamber 105 on inflating seat 102, air inlet 107 connects respectively low pressure by pipeline
Source of the gas 108, middle pressurized air source 109 and high-pressure air source 110.
When in use, the piston rod of gas spring 200 is pulled out, the front end of gas spring 200 is placed in the plenum chamber of inflating seat 102
Sealing member 106 and the fitted seal of gas spring 200 in 105, at the front and back end portses of plenum chamber 105 so that one is formed in plenum chamber 105
Individual confined space, the bottom of gas spring 200 is supported by support block 104, the afterbody of gas spring 200 carried out by limiting plate 103 it is spacing, now
Gas spring 200 is fixed in frock.Then, opening 108 pairs of gas springs 200 of low-pressure gas source carries out first order low inflation, complete
Into rear closing low-pressure gas source 108；In unlatching 109 pairs of gas springs 200 of pressurized air source carry out in the second level pressure inflation, after the completion of close
Pressurized air source 109；Finally, opening 110 pairs of gas springs 200 of high-pressure air source, to carry out the third level high-pressure aerated, after the completion of close high pressure gas
Source 110.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of gas spring is classified inflation method, is inflated by the gap between gas spring at front end fairlead and piston rod,
Without air-filled pore on the plug of gas spring rear end, it is characterised in that：Be inflated by the way of multi-stage inflatable, and inner gas pressure by
Level is raised；At the inflation initial stage, cylinder barrel external pressure is higher than air pressure inside, and due to input is low-pressure gas, and piston rod is slow
Inside press-in cylinder barrel；At the same time, make rapidly cylinder barrel air pressure inside higher than external pressure by continually entering for low-pressure gas,
When piston rod is not also pressed into completely cylinder barrel inside, piston rod is released, to ensure follow-up gas replenishment process in piston rod will not be by
Inside press-in cylinder barrel；In inflation mid-term, input has certain pressure, enough medium pressure gas, to ensure to be filled with inside cylinder barrel
Gas pressure fluctuation range it is little, stable；In inflation latter stage, gases at high pressure are further charged with, relative pressure is less, gas pressure
Input is quick, stable, so as to ensure stablizing for product force value after the completion of inflating.
2. gas spring according to claim 1 is classified inflation method, it is characterised in that：The piston rod of gas spring is drawn first
Go out, pressure inflation and the third level in first order low inflation, the second level are then carried out successively high-pressure aerated.
3. gas spring according to claim 2 is classified inflation method, it is characterised in that：The gas of the first order low inflation
Press as 1～3MPa, inflationtime is 1～2s；The air pressure that inflation is pressed in the second level is 3～10MPa, and inflationtime is 2～5s；The
The high-pressure aerated air pressure of three-level is 10～20MPa, and inflationtime is 2～4s.
4. it is a kind of for described in any one of the claims 1-3 gas spring be classified inflation method frock, it is characterised in that：Bag
Base is included, inflating seat and limiting plate are correspondingly arranged on base, support block, the inflating seat are provided between inflating seat and limiting plate
On open up plenum chamber for matching with gas spring at front end, and sealing member is installed at plenum chamber front and back end portses, open on inflating seat
If the air inlet connected with plenum chamber, air inlet connects respectively low-pressure gas source, middle pressurized air source and high-pressure air source by pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510130481.2A CN104676243B (en) | 2015-03-24 | 2015-03-24 | Classified gas-inflating method for gas spring and tool for method |
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| CN201510130481.2A CN104676243B (en) | 2015-03-24 | 2015-03-24 | Classified gas-inflating method for gas spring and tool for method |
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| CN104676243B true CN104676243B (en) | 2017-04-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107461602A (en) * | 2016-06-02 | 2017-12-12 | 张志卓 | Two stage pressures that compressed natural gas station fills to container are segmented sequentially methods for filling |
| CN110411725A (en) * | 2019-07-30 | 2019-11-05 | 中车长春轨道客车股份有限公司 | A kind of air spring environmental test automatic inflating pressurizing device |
| CN111219595B (en) * | 2020-01-17 | 2021-12-21 | 宁波力品格自动化科技有限公司 | Gas spring double-station inflator |
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| US6601872B2 (en) * | 2001-08-16 | 2003-08-05 | Atlantic Research Corporation | Compact multi-level inflator |
| CN2634188Y (en) * | 2003-07-08 | 2004-08-18 | 张槐义 | Extension gas spring |
| CN1584359A (en) * | 2004-05-31 | 2005-02-23 | 吉林大学 | Leakage-proof oil-gas spring |
| JP4886386B2 (en) * | 2006-06-28 | 2012-02-29 | 大陽日酸株式会社 | High pressure gas supply method |
| DE102007001342A1 (en) * | 2007-01-03 | 2008-07-17 | Siemens Ag | Regulation of an air spring |
| CN201193666Y (en) * | 2008-01-14 | 2009-02-11 | 江阴强顺科技有限公司 | Gas tension spring with air feeding in center |
| CN201747999U (en) * | 2010-06-28 | 2011-02-16 | 隆昌山川精密焊管有限责任公司 | Air inflation device for air spring |
| CN202647182U (en) * | 2012-05-11 | 2013-01-02 | 江南大学 | Nitrogen spring automatic inflator |
| CN202746475U (en) * | 2012-07-27 | 2013-02-20 | 陈月英 | Gas spring |
| CN203453361U (en) * | 2013-09-16 | 2014-02-26 | 汪冰 | Nitrogen spring |
| CN103471786B (en) * | 2013-10-09 | 2016-04-27 | 株洲时代新材料科技股份有限公司 | The assembling of double air spring and air tightness detection equipment and using method thereof |
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Address after: Shanchuan Town, Longchang County, Neijiang City, Sichuan Province Patentee after: Longchang Shanchuan Machinery Co.,Ltd. Address before: Shanchuan Town, Longchang County, Neijiang City, Sichuan Province Patentee before: LONGCHANG SHANCHUAN PRECISION WELDED TUBE Co.,Ltd. |
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Address after: Shanchuan community, Jine street, Longchang City, Neijiang City, Sichuan Province Patentee after: Longchang Shanchuan Machinery Co.,Ltd. Address before: Shanchuan Town, Longchang County, Neijiang City, Sichuan Province Patentee before: Longchang Shanchuan Machinery Co.,Ltd. |