CN107355446A - A kind of piston support structure - Google Patents

A kind of piston support structure Download PDF

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Publication number
CN107355446A
CN107355446A CN201710511196.4A CN201710511196A CN107355446A CN 107355446 A CN107355446 A CN 107355446A CN 201710511196 A CN201710511196 A CN 201710511196A CN 107355446 A CN107355446 A CN 107355446A
Authority
CN
China
Prior art keywords
mounting groove
main body
piston
support block
sealing ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710511196.4A
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Chinese (zh)
Other versions
CN107355446B (en
Inventor
吕治国
赵荣娟
廖振洋
孔荣宗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center
Original Assignee
Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center
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Application filed by Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center filed Critical Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center
Priority to CN201710511196.4A priority Critical patent/CN107355446B/en
Publication of CN107355446A publication Critical patent/CN107355446A/en
Application granted granted Critical
Publication of CN107355446B publication Critical patent/CN107355446B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F15B15/1452—Piston sealings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/02—Wind tunnels
    • G01M9/04—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
    • F15B2215/30—Constructional details thereof

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention belongs to piston field, it is related to a kind of piston support structure, the head in piston support structure of the invention is fixedly connected on the front portion of main body using installation threaded post.Heat insulation loop mounting groove is provided with head exterior surface to be used to heat insulation loop be installed.Circumferentially the first mounting groove, the second mounting groove, the 3rd mounting groove and the 4th mounting groove have been sequentially arranged from front to back vertically in main body, are respectively used to that preceding sealing ring, preceding upper support block and front lower support block, rami posterior superior bracer and rami posterior inferior bracer, rear sealing ring are installed.

Description

A kind of piston support structure
Technical field
The invention belongs to piston field, is related to a kind of piston support structure.
Background technology
Since the fifties in 19th century, FREE-PISTON SHOCK TUNNEL starts to be used in the world, have developed again later Free-piston expands tube wind tunnel.FREE-PISTON SHOCK TUNNEL and expansion tube wind tunnel are mainly used in the mould of hypersonic speed flow field condition Intend, experimental flow field condition is provided for the development of hypersonic missile, space reentry vehicle and other hypersonic aircrafts.
Compared with general shock tunnel, FREE-PISTON SHOCK TUNNEL main difference is that drive part, conventional shock wave The drive section of wind-tunnel is replaced by piston compressed pipe, you can forms FREE-PISTON SHOCK TUNNEL.The operation of FREE-PISTON SHOCK TUNNEL Process is as follows：Piston is parked in the upstream end of piston compressed pipe, and driving gas is filled with before compressed pipe inner carrier.During operation, piston exists Accelerated under drive of high-pressure gas along piston compressed pipe, the kinetic energy of piston is continuously increased, and drives gas also constantly to be pressed Contracting, until piston movement, to from piston compressed pipe downstream nearby, accelerator terminates, it is then rapid to slow down.In piston pressure In the draw, most of kinetic energy of piston has passed to driving gas, the driving condition of HTHP is reached, in rupture of diaphragm Afterwards, intense shock wave is produced in by drive section, test gas forms very high stagnation pressure and temperature under the compression of shock wave.
In FREE-PISTON SHOCK TUNNEL in use, when piston moves in piston compressed pipe, in order to reduce piston and work The friction between compressed pipe is filled in, the diameter of piston is typically slightly less than the internal diameter of piston compressed pipe, by sealing ring by piston and work Gap between plug compressed pipe is sealed, and piston is supported on to the inside of piston compressed pipe, support ring by piston support ring Primarily serve and reduce piston and the effect of the contact area of piston compressed pipe.Support ring is the overall structure of a ring-type, with work Fill in the internal face contact of driving tube.
The content of the invention
It is an object of the invention to provide a kind of piston support structure, by installing discontinuous support block, reduces work Friction between plug and piston compressed pipe, piston will be easier to be accelerated by driving gas, so as to improve the movement velocity of piston, Enhance the performance of actuator piston.
In order to realize foregoing invention purpose, technical scheme is as follows：Piston support structure in the present invention includes Main body, head, heat insulation loop, preceding sealing ring, rear sealing ring, preceding upper support block, front lower support block, rami posterior superior bracer, rami posterior inferior support Block.
Main body is front end closing, a cylindrical housings for open rearward end, and front end connects head by screwed hole, in main body Outer surface on be sequentially provided with the first mounting groove, the second mounting groove, the 3rd mounting groove, the 4th mounting groove.
Head is fixedly connected on the front portion of main body using installation threaded post, and the heat insulation loop of installation heat insulation loop is provided with head Mounting groove.
Heat insulation loop is placed on the heat insulation loop mounting groove on head, and heat insulation loop is made of such as copper using metal material.
On the first mounting groove and the 4th mounting groove of the front and rear sides that preceding sealing ring and rear sealing ring are located at main body, preceding sealing Circle and rear sealing ring are supported using heat resistant rubber.
Preceding upper support block and front lower support block are arranged on the second mounting groove of main body, rami posterior superior bracer and rami posterior inferior bracer On the 3rd mounting groove of main body.
On the second mounting groove of main body, upper support block and a front lower support block before being disposed with three, four support blocks Centrally along being arranged circumferentially for main body, the support block on the 3rd mounting groove is arranged in the same manner.
Beneficial effects of the present invention are：
1. the support block in piston support structure in the present invention, after using abrasion after a while, additional pad can be used The method adjustment of piece and compensation wear-thickness, or support block is directly changed, the regulation difficulty of integrated support circle is overcome, simultaneously It it also avoid changing integrated support ring, save the material and cost of manufacture of support block.
2. using discontinuous support block support piston in the present invention, will be further reduced piston and piston compressed pipe it Between contact area, so as to further reduce the friction between piston and piston compressed pipe, make the driving force of piston strengthen.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is A-A faces sectional view in Fig. 1；
Fig. 3 is the structural representation of the main body in the present invention；
Fig. 4 is the head construction schematic diagram in the present invention；
In figure, 1. heads, 2. main bodys, 3. heat insulation loops, sealing ring before 4., upper support block before 5., 6 front lower support blocks, 7. rami posterior superiors Bracer, 8. rami posterior inferior bracers, sealing ring after 9., 10. first mounting grooves, 11. second mounting grooves, 12. the 3rd mounting grooves, 13. Four mounting grooves, 14. heat insulation loop mounting grooves, 15. connection screw thread posts.
Specific embodiment
Below in conjunction with the accompanying drawings, the solution of the present invention is described in detail.
The piston support structure of the present invention, as shown in figure 1, including main body 2, head 1, heat insulation loop 3, preceding sealing ring 4, rear close Seal 9, preceding upper support block 5, front lower support block 6, rami posterior superior bracer 7, rami posterior inferior bracer 8.
Main body 2 is front end closing, a cylindrical housings for open rearward end, and front end passes through screwed hole and connects head 1, main body 2 material can select aluminium, steel or nonmetallic materials according to the demand of piston mass.
As shown in Fig. 2 on the second mounting groove 11 of main body 2, upper support block 5 and a front lower support before being disposed with three Block 6, being arranged circumferentially centrally along main body 2 of four support blocks, the area of front lower support block 6 are more than preceding upper support block 5 Area.
As shown in figure 3, the first mounting groove 10, the 4th mounting groove 13, the second mounting groove are provided among the outer surface of main body 2 11st, the 3rd mounting groove 12.
As shown in figure 4, head 1 is a thin cylindrical structure, before head 1 is connected to piston only 2 by threaded post 15 Portion, the heat insulation loop mounting groove 14 of installation heat insulation loop 3 is provided with cylinder.
Heat insulation loop 3 is located at the side on head 1, is made of metal material, for isolating high temperature gas flow.
Preceding sealing ring 4 and rear sealing ring 5 are separately mounted on the first mounting groove 10 and the 4th mounting groove 13 of main body 2, point Not Wei Yu main body 2 both ends, for the gap between sealed body 2 and piston compressed pipe, be made of heat resistant rubber.
When piston moves in piston compressed pipe, only eight discrete preceding upper support blocks 5 and front lower support block 6, Rami posterior superior bracer 7 and rami posterior inferior bracer 8 contact with the wall of piston compressed pipe, reduce piston support structure and piston compressed pipe Between contact area, reduce the frictional force that piston moves in piston compressed pipe so that piston be easier by driving gas Body accelerates, and improves the performance of actuator piston.Preceding upper support block 5 and front lower support block 6, rami posterior superior bracer 7 and rami posterior inferior support Block 7 can use method adjustment and the compensation wear-thickness of additional spacer, or the upper branch by before after using abrasion after a while Bracer 5 and front lower support block 6, rami posterior superior bracer 7 and rami posterior inferior bracer 8 are directly changed, and the regulation for overcoming integrated support ring is stranded Difficulty, while it also avoid changing integrated support ring, save material and cost of manufacture.

Claims (5)

  1. A kind of 1. piston support structure, it is characterised in that：Described piston support structure includes main body（2）, head（1）, it is heat-insulated Ring（3）, preceding sealing ring（4）, rear sealing ring（9）, preceding upper support block（5）, front lower support block（6）, rami posterior superior bracer（7）, it is rear under Support block（8）；
    Main body（2）For a front end closing, the cylindrical housings of open rearward end, front end connects head by screwed hole（1）, in master Body（2）Outer surface on be sequentially provided with the first mounting groove（10）, the second mounting groove（11）, the 3rd mounting groove（12）, the 4th installation Groove（13）；
    Head（1）Use installation threaded post（15）It is fixedly connected on main body（2）Front portion, on head（1）It is heat-insulated to be provided with installation Ring（3）Heat insulation loop mounting groove（14）；
    Heat insulation loop（3）It is placed in head（1）Heat insulation loop mounting groove（14）On；
    Preceding sealing ring（4）With rear sealing ring（9）It is located at main body respectively（1）On the first mounting groove（10）With the 4th mounting groove（13） On；
    Preceding upper support block（5）With front lower support block（6）Installed in main body（2）The second mounting groove（11）On, rami posterior superior bracer（7） With rami posterior inferior bracer（8）Installed in main body（2）The 3rd mounting groove（12）On.
  2. 2. piston support structure according to claim 1, it is characterised in that：In main body（2）The second mounting groove（11）On, Upper support block before being provided with three（5）With 1 front lower support block（6）, four support blocks centrally along main body（2）It is circumferential uniformly Arrangement；Rami posterior superior bracer（7）With rami posterior inferior bracer（8）In main body（2）The 3rd mounting groove（12）On set-up mode with before on Support block（5）With front lower support block（6）Set-up mode it is identical.
  3. 3. piston support structure according to claim 1, it is characterised in that：Main body（2）Making material be metal material Aluminium, steel or nonmetallic materials.
  4. 4. piston support structure according to claim 1, it is characterised in that：Heat insulation loop（3）It is made of metal material.
  5. 5. piston support structure according to claim 1, it is characterised in that：Preceding sealing ring（4）With rear sealing ring（9）Adopt It is made of heat resistant rubber material.
CN201710511196.4A 2017-06-29 2017-06-29 A kind of piston support structure Active CN107355446B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710511196.4A CN107355446B (en) 2017-06-29 2017-06-29 A kind of piston support structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710511196.4A CN107355446B (en) 2017-06-29 2017-06-29 A kind of piston support structure

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CN107355446A true CN107355446A (en) 2017-11-17
CN107355446B CN107355446B (en) 2019-01-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108240370A (en) * 2018-02-09 2018-07-03 武汉船用机械有限责任公司 Damper piston

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100520065C (en) * 1999-04-22 2009-07-29 Nvb国际公司 Chamber and piston combination and pump, shock absorber and transducer incorporating the combination
CN102966623A (en) * 2012-12-11 2013-03-13 徐州永佳液压设备有限公司 Heavy-load low-friction hydraulic cylinder
CN203584960U (en) * 2013-11-20 2014-05-07 徐州徐工液压件有限公司 Hydraulic cylinder piston combined type sealing structure
CN104214164A (en) * 2013-05-31 2014-12-17 北京谊安医疗***股份有限公司 Piston assembly
CN204357829U (en) * 2014-12-29 2015-05-27 广东工业大学 Without the quick response balance device of friction
CN204591870U (en) * 2015-05-08 2015-08-26 合肥长源液压股份有限公司 Built-in guide rod oil hydraulic cylinder
CN205503610U (en) * 2016-03-14 2016-08-24 西安雷奥液压设备有限公司 Prevent pneumatic cylinder of yawing force
CN205918687U (en) * 2016-07-12 2017-02-01 天津优瑞纳斯液压机械有限公司 Servo pneumatic cylinder of low friction of high frequency response

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100520065C (en) * 1999-04-22 2009-07-29 Nvb国际公司 Chamber and piston combination and pump, shock absorber and transducer incorporating the combination
US20100170391A1 (en) * 1999-04-22 2010-07-08 Nvb Composites International A/S Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination
CN102966623A (en) * 2012-12-11 2013-03-13 徐州永佳液压设备有限公司 Heavy-load low-friction hydraulic cylinder
CN104214164A (en) * 2013-05-31 2014-12-17 北京谊安医疗***股份有限公司 Piston assembly
CN203584960U (en) * 2013-11-20 2014-05-07 徐州徐工液压件有限公司 Hydraulic cylinder piston combined type sealing structure
CN204357829U (en) * 2014-12-29 2015-05-27 广东工业大学 Without the quick response balance device of friction
CN204591870U (en) * 2015-05-08 2015-08-26 合肥长源液压股份有限公司 Built-in guide rod oil hydraulic cylinder
CN205503610U (en) * 2016-03-14 2016-08-24 西安雷奥液压设备有限公司 Prevent pneumatic cylinder of yawing force
CN205918687U (en) * 2016-07-12 2017-02-01 天津优瑞纳斯液压机械有限公司 Servo pneumatic cylinder of low friction of high frequency response

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108240370A (en) * 2018-02-09 2018-07-03 武汉船用机械有限责任公司 Damper piston

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