CN103291913A - Piston retaining device for gel fuel supercritical research experiments - Google Patents
Piston retaining device for gel fuel supercritical research experiments Download PDFInfo
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- CN103291913A CN103291913A CN2013101936851A CN201310193685A CN103291913A CN 103291913 A CN103291913 A CN 103291913A CN 2013101936851 A CN2013101936851 A CN 2013101936851A CN 201310193685 A CN201310193685 A CN 201310193685A CN 103291913 A CN103291913 A CN 103291913A
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- piston
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- shearing
- position limit
- limit socket
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Abstract
The invention relates to a piston retaining device for gel fuel supercritical research experiments. The piston retaining device comprises a retaining piston, a retaining shell, a pressing plate, a plurality of limiting devices distributed on the circumstance of the retaining shell evenly, a plurality of springs, a plurality of cutting devices and a through groove arranged on the retaining piston axially. The retaining piston is arranged in the retaining shell and can move in the shell. One end of the retaining piston contacts with the front end of the piston. The numbers of the limiting devices, springs and cutting devices are equal and corresponded one by one. One end of the retaining shell is fixed on a compressing pipe. The technical problem that during the gel fuel supercritical experimental segment, a heavy piston compresses to a stopping position of the experimental segment rapidly, the piston rebounds under double effect of high-pressure gas and anti-collision blocks, reliable retaining of the piston in a compressing end point position is realized.
Description
Technical field
The present invention relates to belong to the piston field, be specifically related to a kind of piston stopping device for the overcritical development test of gel fuel, the retaining movement velocity is fast, opposite force is big.
Background technique
In the overcritical behavioral study of gel fuel, for obtain the gel list drip the evaporation under the fuel supercritical state and catch fire, combustion case, the gel list need be dripped fuel and place high temperature and high pressure environment (being higher than the transition point of primary liquid fuel), because routine test section supercharging and intensification fast simultaneously, according to adiabatic isentropic Compression principle, adopt the fast pressure device of taskwork plug to realize uniform High Temperature High Pressure stationary gas environment, satisfy the experimental study requirement.The cardinal principle of this device is: compressed gas-driven taskwork plug high-speed motion in compressed pipe, and the gas in the test section is carried out Fast Compression, thereby (a few tens of milliseconds magnitude) realizes high-pressure high-temperature environment at short notice, and make more than this state continuance 1s.When but this free-moving piston runs to the compression terminal point, can be subjected to test section pressurized gas and anti-collision block bump double action, rebound phenomenon (being backward motion) takes place, not only reduced the pressure and temperature of compressed gas, simultaneously shorten the efficiency test time greatly, even can't satisfy test requirements document.Therefore need the control piston bounce-back, piston is realized " retaining " at place, compression final position.
Summary of the invention
In order to overcome in the overcritical test section of gel fuel, when taskwork plug Fast Compression arrives the test section final position, the technical problem of the section of being put to the test pressurized gas and the resilience of anti-collision block double action lower piston, the invention provides a kind of piston stopping device for the overcritical development test of gel fuel, realize the reliable retaining of compression final position piston.
Technical solution of the present invention is:
A kind of piston stopping device for the overcritical development test of gel fuel, its special way is: comprise retaining piston 4, retaining housing 6, pressing plate 1, a plurality of limit stoper 3 at circumference uniform distribution on the retaining housing 6, a plurality of spring 5, a plurality of shearing device 2 and be axially disposed within groove 7 on the retaining piston, described retaining piston 4 is arranged in the retaining housing 6 and can moves in retaining housing 6, the preceding end in contact of described retaining piston 4 one ends and piston 10, the quantity of described limit stoper 3, spring 5 and shearing device 2 equate and are corresponding one by one;
Described retaining housing one end is fixed on the compressed pipe, and the other end is fixed on the test section,
Described limit stoper 3 comprises pilot sleeve 32 and position limit socket 31, and an end of described pilot sleeve 32 is fixedlyed connected with position limit socket 31, and the other end of described pilot sleeve 32 is fixedlyed connected with pressing plate 1, and described position limit socket 31 is fixed on the retaining housing 6,
Described shearing device 2 comprises to be sheared position limit socket 22 and is fixed on the shearing post of shearing on the position limit socket 22 21, the shearing post 21 of described shearing device 2 passes position limit socket 31 and contacts with retaining housing 6, shearing device 2 cooperates with position limit socket 31 by shearing position limit socket 22, described pressing plate 1, pilot sleeve 32 and shearing position limit socket 22 surround spring chamber, described spring 5 is positioned at spring chamber, one end of described spring 5 cooperates with shearing position limit socket 22, the other end of described spring 5 cooperates with pressing plate 1, and the free end of described shearing post 21 can extend in the groove 7 on the retaining piston 4.
The free-ended cross section of above-mentioned shearing post 21 is arc surface.
Pass through Spielpassung between the front end of above-mentioned retaining piston 21 and piston 10.
The free end of above-mentioned shearing post 21 is provided with a plurality of strengthening rib.
One end of the close test section 9 of above-mentioned retaining piston 4 is frustoconic shape.
Above-mentioned retaining piston 4 circumferentially be provided with seal groove, described retaining piston 4 adopts rubber o-ring and retaining shell 6 circumferential seals.
Above-mentioned limit stoper is 4.
The present invention compared with prior art advantage is:
1, the present invention realizes quick start by the structure of spring and shearing device, improves the reaction velocity of retaining, is conducive to improve the retaining reliability.
2, the retaining piston in the stopping device of the present invention and piston adopt packaging structure, need to reduce the piston mass of retaining, reduce difficulty.
3, shearing post and retaining piston surface of contact are designed to arc surface among the present invention, reduce impact force, improve product structure intensity.
4, the free end of shearing post is provided with a plurality of strengthening rib among the present invention, effectively increases the structural strength of shearing post, improves the reliability of retaining.
5, an end of the close test section of retaining piston 4 of the present invention is for being designed to frustoconic shape, for shear cooperating of post arc surface, reduce impact force, improve the reliability of shearing post.
Description of drawings
Fig. 1 is the structural representation of piston stopping device;
Wherein reference character is: the 1-pressing plate, and the 2-shearing device, 21-shears post, and 22-shears position limit socket, 3-limit stoper, 31-position limit socket, 32-pilot sleeve, 4-retaining piston, 5-spring, 6-retaining housing, 7-groove, 8-compressed pipe, 9-test section, 10-piston.
Embodiment
For retaining, fix one section retaining housing at compressed pipe and test section, at the retaining piston 4 of piston nose increase with piston 10 split type settings, retaining piston 4 is arranged in the retaining housing 6 and can moves in retaining housing 6, at retaining piston neutral position processing axial pass trough, parts such as a plurality of limit stoper 3, a plurality of shearing device 2, a plurality of spring 5 are installed on the retaining housing, and the quantity of limit stoper 3, spring 5 and shearing device 2 equates and is corresponding one by one;
Under the effect of pressing plate 1 and spring, the shearing post is inwardly stretched out.During test, piston moves under high pressure air drives with the retaining piston and contacts, and advances together, and the non-groove zone of retaining piston touches when shearing post, shears post and return back in the position limit socket by compression; Piston and retaining piston move forward groove when shearing the position that post overlaps, lose the compression of retaining piston owing to shear post, inwardly motion rapidly under the spring force effect, thus be stuck in the groove place, realization piston retaining.In order to reduce the retaining piston to shearing the impact of post, shear post and piston surface of contact and be designed to arc surface, and can be good at fitting with retaining piston round table surface.In addition, in order to increase the intensity of shearing post, shearing on the post arc surface, increase several places strengthening rib, thereby effectively increase structural strength, improve the retaining reliability.
Principle of the present invention: because piston weight is 40kg in this device, reach the 10000g magnitude at the reverse acceleration that compresses the terminal point piston, for the needed power of retaining piston is very big, higher to the requirement of strength of stopping mechanism; On the other hand, piston transfers back off procedure to from compression process, and the time is very short, needs stopping mechanism to have the rapid-action ability, can be in time with the piston retaining.With the one package structual of two sections of plunger designs one-tenth front and back, need to reduce the piston mass of retaining, can reduce retaining power greatly; The retaining section is set between test section and compressing section, and the retaining position is the piston stage casing, has increased the rollback distance of piston, thereby increases the retaining reaction time.
Design retaining section between test section and compressed pipe, is generally arranged four separately, will shear post and be installed in the groove, and arc surface is pressed into spring then facing to the retaining piston direction, fixes through pressing plate.The retaining piston is that Spielpassung is connected with the front end of piston, and when piston was subjected to backward active force, the retaining piston was subjected to retaining power retaining, and separate with piston nose the rear end of retaining piston.Section piston place all arranges seal groove in front and back, adopts the rubber o-ring circumferential seal.The front-end face of retaining piston is frustoconic shape, and processing groove in neutral position is sheared post and acted on the groove place, realizes retaining.Because the retaining active force is bigger, in order to strengthen shearing post intensity, selects for use tool steel as rapidoprint.Shear post intensity for improving, increase by three strengthening rib in arc surface one side.
Claims (7)
1. piston stopping device that is used for the overcritical development test of gel fuel, it is characterized in that: comprise retaining piston (4), retaining housing (6), pressing plate (1), go up a plurality of limit stoper (3) of circumference uniform distribution at retaining housing (6), a plurality of springs (5), a plurality of shearing devices (2) and be axially disposed within groove (7) on the retaining piston, described retaining piston (4) is arranged in the retaining housing (6) and can moves in retaining housing (6), the preceding end in contact of described retaining piston (4) one ends and piston (10), described limit stoper (3), the quantity of spring (5) and shearing device (2) equates and is corresponding one by one;
Described retaining housing one end is fixed on the compressed pipe, and the other end is fixed on the test section,
Described limit stoper (3) comprises pilot sleeve (32) and position limit socket (31), one end of described pilot sleeve (32) is fixedlyed connected with position limit socket (31), the other end of described pilot sleeve (32) is fixedlyed connected with pressing plate (1), described position limit socket (31) is fixed on the retaining housing (6)
Described shearing device (2) comprises to be sheared position limit socket (22) and is fixed on the shearing post of shearing on the position limit socket (22) (21), the shearing post (21) of described shearing device (2) passes position limit socket (31) and contacts with retaining housing (6), shearing device (2) cooperates with position limit socket (31) by shearing position limit socket (22), described pressing plate (1), pilot sleeve (32) and shearing position limit socket (22) surround spring chamber, described spring (5) is positioned at spring chamber, one end of described spring (5) cooperates with shearing position limit socket (22), the other end of described spring (5) cooperates with pressing plate (1), and the free end of described shearing post (21) can extend in the groove (7) on the retaining piston (4).
2. the piston stopping device for the overcritical development test of gel fuel according to claim 1, it is characterized in that: the free-ended cross section of described shearing post (21) is arc surface.
3. the piston stopping device for the overcritical development test of gel fuel according to claim 1 and 2 is characterized in that: pass through Spielpassung between the front end of described retaining piston (21) and piston (10).
4. the piston stopping device for the overcritical development test of gel fuel according to claim 3, it is characterized in that: the free end of described shearing post (21) is provided with a plurality of strengthening rib.
5. the piston stopping device for the overcritical development test of gel fuel according to claim 4, it is characterized in that: an end of the close test section (9) of described retaining piston (4) is frustoconic shape.
6. the piston stopping device for the overcritical development test of gel fuel according to claim 5, it is characterized in that: described retaining piston (4) circumferentially be provided with seal groove, described retaining piston (4) adopts rubber o-ring and retaining shell (6) circumferential seal.
7. the piston stopping device for the overcritical development test of gel fuel according to claim 5, it is characterized in that: described limit stoper is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101936851A CN103291913A (en) | 2013-05-22 | 2013-05-22 | Piston retaining device for gel fuel supercritical research experiments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101936851A CN103291913A (en) | 2013-05-22 | 2013-05-22 | Piston retaining device for gel fuel supercritical research experiments |
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| Publication Number | Publication Date |
|---|---|
| CN103291913A true CN103291913A (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101936851A Pending CN103291913A (en) | 2013-05-22 | 2013-05-22 | Piston retaining device for gel fuel supercritical research experiments |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329457A (en) * | 2014-09-17 | 2015-02-04 | 平湖市当湖街道飞天人机械图文设计服务部 | Automobile connecting rod piston and machining process thereof |
| CN105571787A (en) * | 2015-12-22 | 2016-05-11 | 中国计量学院 | PE ball valve port sealing mechanism |
| CN111442931A (en) * | 2020-04-28 | 2020-07-24 | 北华航天工业学院 | Supercritical fuel combustion test equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013386Y (en) * | 2007-03-27 | 2008-01-30 | 郑州煤矿机械集团有限责任公司 | Special column for hydraulic support |
| CN201705279U (en) * | 2010-06-13 | 2011-01-12 | 中国石油化工股份有限公司 | Expansion type sealer |
-
2013
- 2013-05-22 CN CN2013101936851A patent/CN103291913A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013386Y (en) * | 2007-03-27 | 2008-01-30 | 郑州煤矿机械集团有限责任公司 | Special column for hydraulic support |
| CN201705279U (en) * | 2010-06-13 | 2011-01-12 | 中国石油化工股份有限公司 | Expansion type sealer |
Non-Patent Citations (1)
| Title |
|---|
| 唐晓娟: "重活塞驱动器止退装置研制和燃料超临界燃烧初步试验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 09, 15 September 2011 (2011-09-15), pages 27 - 39 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329457A (en) * | 2014-09-17 | 2015-02-04 | 平湖市当湖街道飞天人机械图文设计服务部 | Automobile connecting rod piston and machining process thereof |
| CN105571787A (en) * | 2015-12-22 | 2016-05-11 | 中国计量学院 | PE ball valve port sealing mechanism |
| CN105571787B (en) * | 2015-12-22 | 2017-09-29 | 中国计量大学 | A kind of port sealing mechanism of PE ball valves |
| CN111442931A (en) * | 2020-04-28 | 2020-07-24 | 北华航天工业学院 | Supercritical fuel combustion test equipment |
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Application publication date: 20130911 |