CN203979003U - A kind of high pressure cylinder for wind tunnel test - Google Patents
A kind of high pressure cylinder for wind tunnel test Download PDFInfo
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- CN203979003U CN203979003U CN201420420869.7U CN201420420869U CN203979003U CN 203979003 U CN203979003 U CN 203979003U CN 201420420869 U CN201420420869 U CN 201420420869U CN 203979003 U CN203979003 U CN 203979003U
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- piston
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- end cap
- wind tunnel
- high pressure
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Abstract
The utility model provides a kind of high pressure cylinder for wind tunnel test, comprises base, cylinder barrel, left and right end cap, piston, V-arrangement fixture block, pipe joint, bend pipe, left and right throttle block, seal ring, cushion pad etc.; Air cylinder base and cylinder barrel are welded as a whole, and cylinder body both ends of the surface groove is placed seal ring, composition housing assembly; Piston rod and piston are an one-piece parts, pistion recess fitting tight circle and plastic support ring, and its end face fixedly mounts left and right throttle block, composition piston assembly; Left and right end cap is fixed respectively buffer gasket and is inserted seal ring, and left and right end cap is welded stub connection respectively.Piston assembly packs into after housing assembly, and left and right end cap is connected with screw with housing assembly, finally V-arrangement fixture block is connected with piston assembly end.The utility model cylinder Maximum operating pressure reaches 6MPa, and ouput force reaches 40000N, and boundary dimension is little, simple in structure, reliable, can be used for the test of high speed wind tunnel hatch door.
Description
Technical field
The utility model belongs to flow tunnel testing device technical field, is specifically related to one in wind tunnel test, can realize the high pressure cylinder of strong ouput force in small space.
Background technique
Some testing installations such as high speed wind tunnel often can require trying one's best in little profile, and some activation part of driving model or model changes or locking model attitude the aerodynamic loading under test different conditions.Because high speed wind tunnel airspeed is high, the aerodynamic loading that model is subject to is large, and in particularly ultrasound velocity when test, wind-tunnel starts and cut-offs in process, impulsive load when model can bear and far exceed flow field and stablize.
In the time doing the test of wind-tunnel hatch door, find, when Flow Field in Wind Tunnel is stablized, hatch door rotational load is relatively stable, can rely on servo electrical machinery system to drive and control cabinet gate switch angle.And in the time that wind-tunnel starts or cut-offs, the poor fluctuation of hatch door external and internal pressure is violent, especially, in supersonic flow field foundation or disappearance process, Shock Wave, to hatch door, can make the rapid alternation of moment of hatch door rotating shaft.Therefore need locked hatch door rotating shaft, avoid hatch door switch vibration back and forth.Wind tunnel test simultaneously also must be considered, even if there is hatch door switch vibration back and forth, can immediately move by mechanism, and hatch door rotating shaft is reset to locking angle.
Realize hatch door and reset and locking function, can have kinds of schemes.One is: choose more heavy-duty motor or the rotating shaft of fluid motor-driven hatch door, hatch door loading moment when output is stablized much larger than flow field.The shortcoming of this scheme is: 1. cause whole transmission system boundary dimension to become large, be difficult to real simulation hatch door profile.2. high-power actuating motor can bring larger electromagnetic interference conventionally, is difficult to suppress its interference to the aerodynamic loading sensor taking resistance-strain as principle.3. Hydrauservo System complexity, oil hydraulic motor servo response underspeed.
First scheme is: choose the driven by servomotor hatch door rotating shaft that the hatch door loading moment while stablizing with flow field adapts, simultaneously at the affixed rocking arm in hatch door rotating shaft two ends, by simple and effective pneumatic system, with cylinder reset and locking rocking arm.According to the requirement of high speed wind tunnel hatch door development of test equipment, cylinder block external diameter is limited in 140mm, and cylinder type is double piston-rod cylinder, and piston rod ouput force is up to 40000N, stroke 40mm.Chinese in the time of development wind-tunnel hatch door testing installation, the executive component that has successfully adopted high pressure cylinder to reset and lock as hatch door, has guaranteed the safe condition of hatch door in wind-tunnel startup and the process of cut-offfing.
Pneumatic Transmission working medium easily obtains, and pneumatic system is relatively simple, particularly high pressure cylinder have advantages of ouput force with profile than large, helpful for Developing High-speed wind-tunnel technique.And current domestic low-pressure cylinder (working pressure is lower than 1.0MPa) design and production technology comparative maturity, external low-pressure cylinder brand is sold in China as SMC, PARKER, BOSCH have large-tonnage product.But high pressure cylinder on market (working pressure between 1.0MPa between 15MPa) and ultrahigh pressure cylinder (working pressure is greater than 15MPa) product rareness, have the non-low-pressure cylinder of strict size requirement to need development separately.
Model utility content
For the requirement of high speed wind tunnel hatch door development of test equipment, the utility model provides a kind of high pressure cylinder for high speed wind tunnel test.The high pressure cylinder boundary dimension the utility model proposes than little, can be saved installing space with ouput force; High pressure cylinder is simple in structure, reliable, and cylinder operates steadily, and end of travel is without impact.
The utility model solves the technological scheme that its technical problem adopts: a kind of high pressure cylinder for wind tunnel test, be connected with high-pressure air source, described high pressure cylinder mainly comprises base, cylinder barrel, left end cap, right end cap, piston, V-arrangement fixture block, left throttle block, right throttle block, pipe joint and bend pipe; Cylinder barrel maintains static, and respectively offers annular groove in cylinder barrel both ends of the surface, places seal ring in groove; Piston and piston rod are integrated part, are located in cylinder barrel, and V-arrangement fixture block is connected with piston outer end, and outside piston pressed on ring Zhou Kaishe groove is placed seal ring in groove, and seal ring and inner wall of cylinder close contact are realized sealing; On two end faces of piston, left and right throttle block is installed respectively, two throttling air cavitys of structure piston; Left and right end cap is connected in the both ends of the surface of cylinder barrel, relies on seal ring and cylinder barrel sealing, and the central hole of two end cap is offered groove, inserts Y shape height lip sealing ring and piston seal in groove; The interior edge face of two end cap is all fixed cushion pad, impacts with the buffer piston when the limit position; Connecting tube joint and bend pipe separately in two end cap, be communicated with two throttling air cavitys of piston respectively, forms pressurized gas gateway.
Further:
Base is to be welded into one with cylinder barrel, becomes cylinder block.
V-arrangement fixture block and piston are affixed by screw, thrust or the pulling force of output cylinder.
Left and right throttle block is connected with two end faces of piston by screw.
Cylinder barrel two ends are flange-like structure, and end face is offered described annular groove according to O RunddichtringO standard, inserts O RunddichtringO in groove; Left and right end cap is connected with cylinder barrel by screw, compresses O RunddichtringO, realizes end face static sealing, and sealing load reaches 30MPa.
Outside piston is to offer annular groove according to drum-type sealing ring standard, building drum RunddichtringO and plastic support ring in groove, and drum-type sealing ring is pressed into cylinder barrel together with piston, seals with cylinder barrel.
By the thickness of machining control throttle block, make piston in the time of limit position, throttle block end face distance end cap is 1 millimeter.
The maximum service pressure that two throttling air cavitys of piston are set is 6MPa.
Advantage or the beneficial effect of a kind of high pressure cylinder for wind tunnel test that the utility model provides are: 1, cylinder operation pressure is high, and maximum service pressure is 6MPa, and piston assembly and V-arrangement fixture block thrust output or pulling force reach 40000N.2, cylinder boundary dimension is little, and being suitable for high speed wind tunnel hatch door testing installation etc. has the occasion of strict spatial constraints to use.3,, taking pressurized air or nitrogen or carbon dioxide etc. as working medium, the gas after using is discharged in atmosphere, without independent processing, pollution-free.4, cylinder is swift in response, and stable action, without creeping phenomenon.5, under maximum service pressure, the leakage between piston and cylinder barrel is less than 0.6ml per minute, and the amount of leakage between piston rod and end cap is less than 3.6ml per minute.6, simple structure, cost of production is low, does not need special maintenance.
Brief description of the drawings
Fig. 1 is front view of the present utility model, and employing is analysed and observe mode and expressed.
Fig. 2 is right elevation of the present utility model.
Fig. 3 is plan view of the present utility model, adopts broken section mode to express.
In figure, 1.Y shape height lip sealing ring, 2. cushion pad, 3.M5 socket head screw, 4.M5 spring washer, 5.M10 socket head screw, 6.M10 spring washer, 7. right end cap, 8.O RunddichtringO, 9. base, 10. drum-shape sealing ring, 11. plastic support rings, 12. cylinder barrels, 13. left end caps, 14. pistons, 15.M8 high strength socket head screw, 16.M8 spring washer, 17.V shape fixture block, 18. right pipe joints, 19. right bend pipes, 20. right throttle block, 21.M4 socket head screw, 22.M4 spring washer, 23. left bend pipes, 24. left pipe joints, 25. left throttle block.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is positive view of the present utility model, and Fig. 2 is right elevation of the present utility model, and Fig. 3 is plan view of the present utility model, and wherein Fig. 1 and Fig. 3 represent that V-arrangement fixture block 17 and piston 14 are in limit on the right-right-hand limit position.Can be found out by Fig. 1, Fig. 2 and Fig. 3, a kind of high pressure cylinder critical piece for wind tunnel test of the present utility model is: Y type height lip sealing ring 1, cushion pad 2, right end cap 7, O RunddichtringO 8, base 9, drum-type sealing ring 10, cylinder barrel 12, left end cap 13, piston 14, V-arrangement fixture block 17, right throttle block 20, left throttle block 25.Its annexation is: base 9 and cylinder barrel 12 are by being welded to form overall cylinder block; V-arrangement fixture block 17 fixes as one by high-strength screw with piston 14, the one-piece parts that piston 14 processes for the high tensile steel that comprises piston rod function; Piston 14 is assemblied in cylinder barrel 12, and two operative end surface of piston are in cylinder barrel; Right throttle block 20 is connected with two end faces of piston 14 by screw with left throttle block 25; And right throttle block 20 and left throttle block 25 are respectively taking right end cap 7 and left end cap 13 as main body is installed, (right pipe joint 18, right bend pipe 19 are arranged on right end cap to form the import and export of cylinder with bend pipe separately, pipe joint, left bend pipe 23, left pipe joint 24 are arranged on left end cap, communicate with the inner chamber of cylinder).
Right end cap 7 is all connected with cushion pad 2 separately with left end cap 13 simultaneously, cushion pad is installed on the inner side of end cap by M5 socket head screw 3 and M5 spring washer 4, at cylinder piston limit travel end, by cushion pad and piston 14 end contacts, avoid direct gouging abrasion; Right end cap 7 and left end cap 13 be the two ends at cylinder barrel 12 by screw fastening.
Be it can also be seen that by Fig. 1, Fig. 2 and Fig. 3: cylinder barrel 12 two ends are flange-like structure, end face is offered annular groove according to O RunddichtringO standard-required, insert O RunddichtringO 8, right end cap 7 is connected with cylinder barrel 12 respectively by screw with left end cap 13, simultaneously impel O RunddichtringO 8 because of compression and be out of shape, this end face static sealing can sealing load reaches the gas of 30MPa.
Piston 14 cylindricals are offered annular groove according to drum-type sealing ring standard-required, building drum RunddichtringO 10 and plastic support ring 11 in groove, this drum-type sealing ring is pressed in cylinder barrel 12 processes together with piston 14, the tensioner distortion with inner wall of cylinder close contact, be suitable for bidirectional reciprocating motion sealing, seal gas pressure can reach 25MPa, ensures that high pressure cylinder is without internal leakage; This drum-type sealing ring is under same internal diameter of cylinder simultaneously, the axial dimension of piston is relatively little, choose appropriate piston external diameter and internal diameter of cylinder tolerance of size, ensure that drum-type sealing ring 10 is out of shape moderate, barometric pressure pressure reduction of no-load condition lower cylinder two cavity can be to promote piston.
Right end cap 7 and left end cap 13 endoporus are offered annular groove according to Y type height lip sealing ring standard-required, snap in Y type height lip sealing ring 1, as the sealing between piston 14 external parts and cylinder end piece, the notching construction that this seal ring requires is simple, seal ring self-styled is good, seal gas pressure reaches 12MPa, external leakage can be controlled in critical field.
Wind tunnel test necessarily requires cylinder operation reliable, and the working pressure of high pressure cylinder must have larger safety redundancy simultaneously, and setting maximum service pressure is 6MPa.Two screws of right throttle block 20 use 21 are fastenedly connected with the right side of piston 14, the thickness of the right throttle block 20 of machining control, make piston 14 in the time of limit on the right-right-hand limit position, right throttle block 20 right sides only have 1 millimeter apart from right end cap 7, at this moment gas passes in and out and must be subject to throttling restriction between the right chamber of cylinder and right bend pipe 19, cylinder right chamber inflation or exhaust velocity reduce, thus damper piston motion.Left throttle block 25 and 20 same purposes of right throttle block, just opposite direction, structure is also identical with it, no longer repeats.
Generally speaking, be that air cylinder base and cylinder barrel are welded into a body component, cylinder barrel both ends of the surface groove is placed O RunddichtringO, composition housing assembly; Piston and piston rod are Same Part, and in the groove of outside piston, assembling drum ring rubber and plastic support ring, connect left and right throttle block with screw in the both ends of the surface of piston, composition piston assembly; Cylinder two end cap is all inserted the sealing of the lip sealing ring realization of Y shape height and piston, and interior edge face is fixed cushion pad, impacts with buffer piston.When assembling, first piston assembly is packed in housing assembly, then two end cap is connected with screw with housing assembly, the O RunddichtringO compression of placing in cylinder barrel both ends of the surface groove is realized to the sealing of end cap and cylinder body, the Y shape height lip sealing ring that end cap is embedded in simultaneously and piston are realized sealing; Finally by affixed to V-arrangement fixture block and piston assembly left end.Before end cap assembling, right end cap, right suction tude, right connector three are welded as a whole, and left end cap, left suction tude, left joint three are welded as a whole, and then pack into.
A kind of high pressure cylinder course of action for wind tunnel test of the present utility model is: when 1. hypothesis starts, be to pass into pressurized gas by right pipe joint 18 and right bend pipe 19, originally the throttle chink that right throttle block 20 and right end cap 7 form, gas communication is subject to throttling, the right chamber of cylinder gas pressure steadily raises, in the time being greater than between Sealing and cylinder metal parts frictional force and V-arrangement fixture block 17 with its guide element (this part does not belong to the utility model) frictional force sum, piston starts mobile left, and left chamber gas is started to discharge by left pipe joint 24 and left bend pipe 23; 2. when V-arrangement fixture block 17 moves to left with piston 14, run into working resistance, the right chamber of cylinder gas pressure continues to raise, be up to 6MPa, the left chamber of cylinder is communicated with atmosphere via gas circuit always, the pressure of piston right side and the pressure of left side poor, is greater than working resistance, and V-arrangement fixture block 17 continues to move to left with piston 14; 3. near limit on the left stroke, the left throttle block that piston 14 left sides connect is near left end cap 13, the left chamber of cylinder gas flows out and is hindered, the left cavity pressure of cylinder raises, V-arrangement fixture block 17 and piston 14 deceleration of motion, till, piston 14 bumps against the cushion pad 2 affixed with left end cap 13 when the rearmost position, 17 motions of V-arrangement fixture block stop.Move in the other direction as the same.The gas using can be the working mediums such as pressurized air or nitrogen or carbon dioxide, and the gas after using is discharged in atmosphere, without independent processing, pollution-free.
Claims (8)
1. for a high pressure cylinder for wind tunnel test, be connected with high-pressure air source, it is characterized in that: described high pressure cylinder mainly comprises base, cylinder barrel, left end cap, right end cap, piston, V-arrangement fixture block, left throttle block, right throttle block, pipe joint and bend pipe;
Cylinder barrel maintains static, and respectively offers annular groove in cylinder barrel both ends of the surface, places seal ring in groove;
Piston and piston rod are integrated part, are located in cylinder barrel, and V-arrangement fixture block is connected with piston outer end, and outside piston pressed on ring Zhou Kaishe groove is placed seal ring in groove, and seal ring and inner wall of cylinder close contact are realized sealing; On two end faces of piston, left and right throttle block is installed respectively, two throttling air cavitys of structure piston;
Left and right end cap is connected in the both ends of the surface of cylinder barrel, relies on seal ring and cylinder barrel sealing, and the central hole of two end cap is offered groove, inserts Y shape height lip sealing ring and piston seal in groove; The interior edge face of two end cap is all fixed cushion pad, impacts with the buffer piston when the limit position; Connecting tube joint and bend pipe separately in two end cap, be communicated with two throttling air cavitys of piston respectively, forms pressurized gas gateway.
2. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: described base and cylinder barrel are welded into cylinder block.
3. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: described V-arrangement fixture block and piston are affixed by screw, thrust or the pulling force of output cylinder.
4. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: left and right throttle block is connected with two end faces of piston by screw.
5. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: cylinder barrel two ends are flange-like structure, and end face is offered described annular groove according to O RunddichtringO standard, inserts O RunddichtringO in groove; Left and right end cap is connected with cylinder barrel by screw, compresses O RunddichtringO, realizes end face static sealing, and sealing load reaches 30MPa.
6. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: outside piston is offered annular groove according to drum-type sealing ring standard, building drum RunddichtringO and plastic support ring in groove, and drum-type sealing ring is pressed into cylinder barrel together with piston.
7. according to the high pressure cylinder for wind tunnel test described in claim 1 or 4, it is characterized in that: the thickness of machining control throttle block, make piston in the time of limit position, throttle block end face distance end cap is 1 millimeter.
8. the high pressure cylinder for wind tunnel test according to claim 1, is characterized in that: the maximum service pressure that two throttling air cavitys of piston are set is 6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420420869.7U CN203979003U (en) | 2014-07-29 | 2014-07-29 | A kind of high pressure cylinder for wind tunnel test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420420869.7U CN203979003U (en) | 2014-07-29 | 2014-07-29 | A kind of high pressure cylinder for wind tunnel test |
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| Publication Number | Publication Date |
|---|---|
| CN203979003U true CN203979003U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420420869.7U Expired - Fee Related CN203979003U (en) | 2014-07-29 | 2014-07-29 | A kind of high pressure cylinder for wind tunnel test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561370A (en) * | 2018-07-23 | 2018-09-21 | 北京航空航天大学 | A kind of air pulsing pressure-generating device |
-
2014
- 2014-07-29 CN CN201420420869.7U patent/CN203979003U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561370A (en) * | 2018-07-23 | 2018-09-21 | 北京航空航天大学 | A kind of air pulsing pressure-generating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20150729 |
|
| EXPY | Termination of patent right or utility model |