CN107355446B - A kind of piston support structure - Google Patents
A kind of piston support structure Download PDFInfo
- Publication number
- CN107355446B CN107355446B CN201710511196.4A CN201710511196A CN107355446B CN 107355446 B CN107355446 B CN 107355446B CN 201710511196 A CN201710511196 A CN 201710511196A CN 107355446 B CN107355446 B CN 107355446B
- Authority
- CN
- China
- Prior art keywords
- mounting groove
- main body
- supporting block
- piston
- support structure
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
Landscapes
- 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 fields, are related to a kind of piston support structure, and the head in piston support structure of the invention is fixedly connected on the front of main body using installation threaded post.Heat insulation loop mounting groove is equipped with for installing heat insulation loop in head exterior surface.Circumferentially the first mounting groove, the second mounting groove, third mounting groove and the 4th mounting groove have been sequentially arranged from front to back along axial direction in main body, are respectively used to that preceding sealing ring, preceding upper supporting block and front lower supporting block, rami posterior superior bracer and rami posterior inferior bracer, rear sealing ring are installed.
Description
Technical field
The invention belongs to piston fields, are related to a kind of piston support structure.
Background technique
Since the fifties in 19th century, FREE-PISTON SHOCK TUNNEL starts to be obtained in the world using later to have developed again
Free-piston expands tube wind tunnel.FREE-PISTON SHOCK TUNNEL and expansion tube wind tunnel are mainly used for the mould of hypersonic speed flow field condition
It is quasi-, 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, that is, may make up 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 piston.When operation, piston exists
It is accelerated under drive of high-pressure gas along piston compressed pipe, the kinetic energy of piston is continuously increased, and gas is driven also constantly to be pressed
Contracting, until piston motion is to nearby from piston compressed pipe downstream, accelerator is terminated, and is then slowed down rapidly.In piston pressure
In the draw, most of kinetic energy of piston has passed to driving gas, the driving condition of high temperature and pressure is reached, in rupture of diaphragm
Afterwards, intense shock wave is generated 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 the effect for reducing the contact area of piston and piston compressed pipe.Support ring is a cricoid overall structure, with work
Fill in the inner wall face contact of driving tube.
Summary of the invention
The purpose of the present invention is to provide a kind of piston support structures to reduce work by installing discontinuous supporting block
Friction between plug and piston compressed pipe, piston will be easier to be accelerated by driving gas, so that the movement velocity of piston is improved,
Enhance the performance of actuator piston.
In order to achieve the above-mentioned object of the invention, technical scheme is as follows: the piston support structure in the present invention includes
Main body, head, heat insulation loop, preceding sealing ring, rear sealing ring, preceding upper supporting block, front lower supporting block, rami posterior superior bracer, rami posterior inferior support
Block.
Main body is the cylindrical housings of a front end closing, open rearward end, and front end connects head by threaded hole, in main body
Outer surface on be successively arranged the first mounting groove, the second mounting groove, third mounting groove, the 4th mounting groove.
Head is fixedly connected on the front of main body using installation threaded post, and the heat insulation loop of installation heat insulation loop is equipped on 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 supporting block and front lower supporting block are mounted on the second mounting groove of main body, rami posterior superior bracer and rami posterior inferior bracer
It is mounted on the third mounting groove of main body.
On the second mounting groove of main body, arrangement there are three preceding upper supporting block and a front lower supporting block, four supporting blocks
Center is arranged circumferentially along main body, and the supporting block on third mounting groove is arranged in the same manner.
The invention has the benefit that
1. the supporting block in piston support structure in the present invention can use attached after using abrasion after a period of time
The method of shimming adjusts and compensation wear-thickness, or supporting block is directly replaced, and the adjusting for overcoming integrated support circle is difficult,
Replacement integrated support ring is also avoided simultaneously, saves the material and cost of manufacture of supporting block.
2. support piston using discontinuous supporting block in the present invention, will be further reduced piston and piston compressed pipe it
Between contact area enhance the driving capability of piston to further decrease the friction between piston and piston compressed pipe.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the face A-A cross-sectional view in Fig. 1；
Fig. 3 is the structural schematic diagram 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 supporting block before 5., 6 front lower supporting blocks, after 7.
Upper supporting block, 8. rami posterior inferior bracers, sealing ring after 9., 10. first mounting grooves, 11. second mounting grooves, 12. third mounting grooves,
13. the 4th mounting groove, 14. heat insulation loop mounting grooves, 15. connection screw thread columns.
Specific embodiment
With reference to the accompanying drawing, the solution of the present invention is described in detail.
Piston support structure of the 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 supporting block 5, front lower supporting block 6, rami posterior superior bracer 7, rami posterior inferior bracer 8.
Main body 2 is the cylindrical housings of a front end closing, open rearward end, and front end connects head 1, main body by threaded hole
2 material can select aluminium, steel or nonmetallic materials according to the demand of piston mass.
As shown in Fig. 2, there are three preceding upper supporting block 5 and a front lower supports for arrangement on the second mounting groove 11 of main body 2
The area of block 6, center being arranged circumferentially along main body 2 of four supporting blocks, front lower supporting block 6 is greater than preceding upper supporting block 5
Area.
As shown in figure 3, being equipped with the first mounting groove 10, the 4th mounting groove 13, the second mounting groove among the outer surface of main body 2
11, third 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 is equipped with the heat insulation loop mounting groove 14 of installation heat insulation loop 3 on cylinder.
Heat insulation loop 3 is located at the side on head 1, is made of metal material, for high temperature gas flow to be isolated.
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 the both ends of main body 2 be made for the gap between sealed body 2 and piston compressed pipe of heat resistant rubber.
When piston moves in piston compressed pipe, only eight it is discrete before upper supporting blocks 5 and front lower supporting block 6,
Rami posterior superior bracer 7 and rami posterior inferior bracer 8 are contacted with the wall surface 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, thus make piston be easier by driving gas
Body accelerates, and improves the performance of actuator piston.Preceding upper supporting block 5 and front lower supporting block 6, rami posterior superior bracer 7 and rami posterior inferior support
Block 7 through after a period of time using abrasion after, can method adjustment using additional spacer and compensation wear-thickness, or by preceding upper branch
Bracer 5 and front lower supporting block 6, rami posterior superior bracer 7 and rami posterior inferior bracer 8 are directly replaced, and the adjusting for overcoming integrated support ring is tired
Difficulty, while replacement integrated support ring is also avoided, save material and cost of manufacture.
Claims (5)
1. a kind of piston support structure, it is characterised in that: the piston support structure includes main body (2), head (1), heat-insulated
Ring (3), preceding sealing ring (4), rear sealing ring (9), preceding upper supporting block (5), front lower supporting block (6), rami posterior superior bracer (7), it is rear under
Supporting block (8)；
Main body (2) is the cylindrical housings of a front end closing, open rearward end, and front end connects head (1) by threaded hole, in master
The first mounting groove (10), the second mounting groove (11), third mounting groove (12), the 4th installation are successively arranged on the outer surface of body (2)
Slot (13)；
Head (1) is fixedly connected on the front of main body (2) using installation threaded post (15), and it is heat-insulated that installation is equipped on head (1)
The heat insulation loop mounting groove (14) of ring (3)；
Heat insulation loop (3) is placed on the heat insulation loop mounting groove (14) on head (1)；
Preceding sealing ring (4) and rear sealing ring (9) are located at the first mounting groove (10) and the 4th mounting groove (13) on main body (1)
On；
Preceding upper supporting block (5) and front lower supporting block (6) are mounted on the second mounting groove (11) of main body (2), rami posterior superior bracer (7)
It is mounted on the third mounting groove (12) of main body (2) with rami posterior inferior bracer (8).
2. piston support structure according to claim 1, it is characterised in that: on the second mounting groove (11) of main body (2),
There are three preceding upper supporting block (5) and a front lower supporting blocks (6) for setting, and the center of four supporting blocks is along the circumferential equal of main body (2)
Even arrangement；Rami posterior superior bracer (7) and rami posterior inferior bracer (8) are in the set-up mode on the third mounting groove (12) of main body (2) with before
Upper supporting block (5) is identical with the set-up mode of front lower supporting block (6).
3. piston support structure according to claim 1, it is characterised in that: the making material of main body (2) is metal material
Aluminium, steel or nonmetallic materials.
4. piston support structure according to claim 1, it is characterised in that: heat insulation loop (3) is made of metal material.
5. piston support structure according to claim 1, it is characterised in that: preceding sealing ring (4) and rear sealing ring (9) are adopted
It is made of heat resistant rubber material.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355446A CN107355446A (en) | 2017-11-17 |
| CN107355446B true CN107355446B (en) | 2019-01-11 |
Family
ID=60274118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710511196.4A Active CN107355446B (en) | 2017-06-29 | 2017-06-29 | A kind of piston support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355446B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240370B (en) * | 2018-02-09 | 2020-09-15 | 武汉船用机械有限责任公司 | Buffer piston |
Citations (8)
| 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 | 北京谊安医疗系统股份有限公司 | 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 |
-
2017
- 2017-06-29 CN CN201710511196.4A patent/CN107355446B/en active Active
Patent Citations (8)
| 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 |
| CN104214164A (en) * | 2013-05-31 | 2014-12-17 | 北京谊安医疗系统股份有限公司 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107355446A (en) | 2017-11-17 |
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