CN100386610C - Pneumatic type multiple waveform active shock waveform generator - Google Patents
Pneumatic type multiple waveform active shock waveform generator Download PDFInfo
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- CN100386610C CN100386610C CNB2004100661265A CN200410066126A CN100386610C CN 100386610 C CN100386610 C CN 100386610C CN B2004100661265 A CNB2004100661265 A CN B2004100661265A CN 200410066126 A CN200410066126 A CN 200410066126A CN 100386610 C CN100386610 C CN 100386610C
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- 230000035939 shock Effects 0.000 title claims description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- 230000001133 acceleration Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000009863 impact test Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The present invention relates to an air pressure type multi-waveform driving surge waveform generator which is composed of a complete set of elastic washers (1), a first level piston rod (2), an annular sealing ring (3), a normal pressure small air chamber (4), a piston (5), a hyperbaric chamber (6), a secondary piston rod (7), a low pressure air chamber (8), three sealing rings with six valves (9), an O-shaped sealing ring (10), a piezoelectric ceramic executor (11), a cylinder cover (12), an impact platform (13), a large cylinder body (a) and a small cylinder body (b). The present invention can achieve the excitation of overload waveforms, such as half-sine waves, postpeak sawtooth waves, etc., of products with large weight, and has the advantages of good waveform maneuverability, repetition accuracy, wider application range, simple structure and reliability, and can satisfy the test requirements of heavy loads and large impact.
Description
Affiliated technical field
This invention is a kind of satisfy heavy duty, large impact testing requirements, particularly a kind of Pneumatic type multiple waveform active shock waveform generator that can produce half-sine wave, postpeak sawtooth wave.
Background technology
In the emission process of guided missile, the unexpected variation of energy might damage the runnability of guided missile system, usually also can destroy the overall construction intensity of guided missile and the reliability of electronic equipment, reduces hit rate.Therefore, for adapting to more and more higher accuracy requirement, safety requirements, before guided missile dispatches from the factory, then need guided missile is carried out disposable overload measurement, thereby guarantee that guided missile can operate as normal.But when carrying out overload test for the bigger product of weight at present, be difficult to obtain simultaneously big overload values and long impact pulsewidth, also be difficult to the repeatable accuracy and the controllability of control overload waveform.
In the impact and impact environment test standard of standardization body or mechanism promulgation at home and abroad, the impact that experimental facilities should satisfy, waveform (comprising half-sine wave, postpeak sawtooth wave etc.), tolerance band and the corresponding velocity variable and the capacity of crash acceleration pulse have all been stipulated.Yet, the shock environment analogue technique develops into today, except several can be with function accurately the standard shock pulse of definition can reappear in testing laboratory comparatively exactly repeatedly, reappear the true shock environment in the engineering and reach certain degree of accuracy and remain in certain difficulty.The impulse test big for some big quality test specimens (as guided missile), acceleration peak value especially and the surge waveform requirement is comparatively strict is difficult to the requirement of conformance with standard regulation at aspects such as waveform and precision.
The present invention's " Pneumatic type multiple waveform active shock waveform generator " can realize overload waveform stimulus such as half-sine wave and postpeak sawtooth wave at the bigger product of quality, and has good controllable waveform and repeatable accuracy.
Summary of the invention
The purpose of this invention is to provide a kind of can satisfy heavy duty, large impact testing requirements, helps meeting the Pneumatic type multiple waveform active shock waveform generator of national military standard.
This invention is by being provided with complete elastic washer, and the design of high pressure, normal pressure, three air chambers of low pressure and piezoelectric ceramic actuator realizes goal of the invention, and this technical scheme is as follows:
Constitute plenum chamber by big cylinder body, the little cylinder body that links to each other with big cylinder body lower end constitutes low-pressure chamber, cylinder cap places in the big cylinder body upper end, seal by grommet type seals between big cylinder body and the cylinder cap, piston places in the plenum chamber with between the cylinder cap and closely contacts the little air chamber of formation normal pressure by the O RunddichtringO, piston lower end central authorities with pass the second piston rod that big cylinder body diapire extends in the low-pressure chamber and link to each other, seal by three or six flap seal circles between second piston rod and the big cylinder body diapire, piston upper end central authorities link to each other with the lower end of the first stage piston bar that passes cylinder cap, the upper end of first stage piston bar is connected in the impact platform lower end that complete elastic washer is equipped with at its top, piezoelectric ceramic actuator is positioned at the outer upper end of casing wall of big cylinder body and links to each other with two gas ports up and down, the casing wall that wherein descends gas port to pass big cylinder body communicates with plenum chamber, and casing wall and cylinder cap that last gas port passes big cylinder body communicate with the little air chamber of normal pressure.
Compared with prior art, this invention has following advantage:
1. the present invention can realize half-sine wave and two kinds of waveform stimulus of postpeak sawtooth wave by regulating parameter.Be mounted with the gases at high pressure of specified pressure value in the plenum chamber of the present invention in advance, elastic deformation can take place in complete elastic washer after being subjected to heavily loaded percussive action, when the shock load peak value is lower than the set threshold value of gases at high pressure, only complete elastic washer work can realize the excitation of half-sine wave shock pulse; When shock load reached the set threshold value of gases at high pressure, piston is instantaneous to be moved downward, and the ACTIVE CONTROL piezoelectric ceramic actuator makes plenum chamber communicate with the low-pressure chamber of piston upper end simultaneously, carries out the active off-load, can realize that postpeak sawtooth wave shock pulse encourages.
2. the present invention can effectively control overload values, and scalable surge waveform parameter, obtains precipitous pulse back edge.The present invention is provided with complete elastic washer impacting on the platform, can be by increasing or reduce the quantity and the size of elastic washer, with parameters such as the rigidity of regulating elastic washer, ratio of damping, control the forward position of postpeak sawtooth wave waveform and the waveform of half-sine wave; Gases at high pressure are housed in the plenum chamber, low-pressure gas is housed in the low-pressure chamber, can be by adjusting to gas rated pressure in the high and low pressure air chamber, the control on edge behind the realization postpeak sawtooth wave waveform; Between plenum chamber and the little air chamber of piston upper end normal pressure, be provided with gas passage by piezoelectric ceramic actuator control, duty by the ACTIVE CONTROL piezoelectric ceramic actuator, can reduce back that elastic recovery because of the O RunddichtringO produces along time delay, the size of strict control peak accelerator, and avoid because of the issuable secondary pulse of the elastic recovery of O RunddichtringO, the edge is steady behind the maintenance waveform.Therefore, the present invention in can the impact process of the test half-sine wave and severity, the quality of postpeak sawtooth wave waveform carry out strictness control, make its conformance with standard.
3. the present invention adapts to tens kilograms of impact acceleration tests to several tons of weight test specimens.The structural design of this invention allows the weight of impacted object to have tens kilograms to several tons, and the impact acceleration peak value is up to 20～25g, so this invention can satisfy heavy duty, large impact testing requirements, and range of application is wider.
4. the present invention can obtain big impact acceleration peak value and long shock pulse width simultaneously.The shock pulse acceleration peak value that the present invention produced and the before and after edge width of shock pulse waveform are separate adjustable, but peak value and before and after edge width by complete elastic washer and two air chambers of high and low pressure and piezoelectric ceramic actuator impact pulse waveform are done to adjust arbitrarily, so the pulse waveform that the present invention produced can fall in proof force pulse waveform and the tolerance band thereof fully.
5. the present invention can automatically restore to original state after impulse test.Second piston rod of the present invention slightly is narrower than the first stage piston bar, can guarantee that after impact stroke finishes the piston both sides in the plenum chamber have certain pressure differential and produce upwards anchorage force, make piston move to reference position on automatically, the gaseous tension loss is little, the repeated application height.
6. the present invention simple in structure, reliable, can use the repeatable accuracy height repeatedly.The forward position of impact pulse waveform of the present invention is regulated and is relied on quantity and the size of adjusting complete elastic washer, the back is directly regulated along regulating the gaseous tension that relies in the high and low pressure air chamber, and,, this invention adjusts easy advantage so having by piezoelectric ceramic actuator realization ACTIVE CONTROL.
The invention has the beneficial effects as follows,, can reappear the actual impact of big weight object in the engineering application process accurately, quickly and easily and add low speed state, can satisfy polytype weight, the testing requirements of large impact overload impact by the mechanical analogue means.In addition, by adding other servicing units, the present invention can carry out computer-automatic collection, handle and analysis the exercise parameter of transient impact process, overload curves, impulsive force etc., can realize the comprehensive detection of weight acceleration overload performance.
Description of drawings
Fig. 1 is this invention Pneumatic type multiple waveform active shock waveform generator general structure synoptic diagram.
Label and designation among Fig. 1: 1. complete elastic washer, 2. first stage piston bar, 3. grommet type seals, 4. the little air chamber of normal pressure, 5. piston, 6. plenum chamber, 7. second piston rod, 8. low-pressure chamber, 9. three or six flap seal circles, 10.O RunddichtringO, 11. piezoelectric ceramic actuator, 12. cylinder caps, 13. impact platform, a. big cylinder body, the little cylinder body of b..
Embodiment:
Narrate concrete composition of the present invention, principle of work and the course of work according to Fig. 1:
This invention comprises complete elastic washer 1, piston 5, and the stingy chamber 4 of normal pressure, plenum chamber 6, low-pressure cylinder 8, piezoelectric ceramic actuator 11 impacts parts such as platform 13.Piston 5 is between high-pressure cylinder 6 and the stingy chamber 4 of normal pressure, by with cylinder cap 12 between O RunddichtringO 10 tight contact and realize sealing, the lower end links to each other with second piston rod 7, the upper end by first stage piston bar 2 with impact platform 13 and link to each other, that cylinder cap 12 plays is fixing, sealing and guide effect; Impact intrinsic complete elastic washer 1 on the platform 13; Second piston rod 7 times is disconnected to be extended in the low-pressure chamber 8, and realizes sealing by three or six flap seal circles 9, and it is poor that it mainly plays further regulating piston 5 pressure at two ends, regulates behind the waveform along the width effect; Piezoelectric ceramic actuator 11 is positioned at the outer upper end of casing wall, it connects two gas ports, one gas port passes casing wall and communicates with plenum chamber 6, another gas port passes casing wall, cylinder cap 12 communicates with the stingy chamber 4 of normal pressure, duty by ACTIVE CONTROL piezoelectric ceramic actuator 11, can be when postpeak sawtooth wave shock pulse responds, minimizing because of the elastic recovery of O RunddichtringO 10 produce back along time delay, the size of strict control peak accelerator, and the secondary pulse of avoiding the elastic recovery because of O RunddichtringO 10 to produce, keep edge behind the waveform steadily.Therefore, can regulate the gas rated pressure in plenum chamber 6 and the low-pressure cylinder 8 by regulating rigidity, the ratio of damping of complete elastic washer 1, and ACTIVE CONTROL piezoelectric ceramic actuator 11, realize dissimilar standard shock pulse waveforms, to meet military standard of China.
When carrying out impulse test, at first require to calculate specified shock load peak value size according to impacting, if half-sine wave shock pulse response, then only make complete elastic washer 1 work, promptly in plenum chamber 6, load the gases at high pressure of certain pressure in advance by transfer port, make the support loads that gases at high pressure provided in the plenum chamber 6 be higher than specified shock load, and the gas in the low-pressure chamber 8 can be made as atmospheric pressure state, at this moment, the quantity and the size of complete elastic washer 1 are set along the size of width requirement and shock load peak value according to the front and back of waveform again, adjust the rigidity of complete elastic washer 1, parameters such as ratio of damping are so that the shock pulse waveform satisfies the impulse test requirement.
If impulse test requires to be the response of postpeak sawtooth wave, then make the support loads that gases at high pressure provided in the plenum chamber 6 equal specified shock load, to take into account the gaseous tension in the low-pressure chamber 8 this moment so that the back of surge waveform satisfies the impact requirement along width, and reconcile still will be by quantity and the size that complete elastic washer 1 is set in the forward position of surge waveform, and the parameters such as rigidity, ratio of damping of promptly adjusting complete elastic washer 1 satisfy the impact requirement.During gaseous tension provided in the shock load peak value meets and exceeds plenum chamber 6 support loads, piston 5 instantaneous moving downward, the pressure of piston 5 both sides maintains an equal level rapidly, promptly the support loads that is provided by gas sharply descends, the great number of elastic deformation energy instantaneous relase that accumulate in the complete elastic washer this moment, react on piston 5 and the piston rod 2,7 of quality, can realize the response of postpeak sawtooth wave shock pulse much smaller than impacted object.But in the moment that piston 5 moves downward, 10 of the O RunddichtringOs of pressurized can elastic recovery, produce certain waveform trailing edge delay, cause the overproof of peak accelerator, therefore, when reaching ratings, the shock load peak value starts piezoelectric ceramic actuator 11, conducting plenum chamber 6 carries out the active off-load with the stingy chamber 4 of normal pressure, can reduce the shock response time delay that produces because of 10 resiliences of O RunddichtringO, the size of strict control peak accelerator, and the secondary pulse of avoiding the elastic recovery because of O RunddichtringO 10 to produce, keep edge behind the waveform steadily.In addition, because the existence of second piston rod 7 and low-pressure chamber 8, can further reduce the pressure reduction of piston rod both sides, control the severity and the width on edge behind the postpeak sawtooth wave better, because second piston rod 7 slightly is narrower than first stage piston bar 2, can guarantee after impact stroke finishes, piston both sides in the plenum chamber 6 have certain pressure differential and produce upwards anchorage force, make piston move to reference position on automatically, ACTIVE CONTROL piezoelectric ceramic actuator 11, close plenum chamber 6 gas ports, and the stingy chamber of normal pressure 4 gas ports are communicated with ambient atmosphere, close this stingy chamber gas port when the gaseous tension of the stingy chamber 4 of normal pressure during for normal pressure, at this moment, total system returns to pre-duty once more.
Claims (1)
1. Pneumatic type multiple waveform active shock waveform generator, it is characterized in that, comprise complete elastic washer (1), first stage piston bar (2), grommet type seals (3), the little air chamber of normal pressure (4), piston (5), plenum chamber (6), second piston rod (7), low-pressure chamber (8), three or six flap seal circles (9), O RunddichtringO (10), piezoelectric ceramic actuator (11), cylinder cap (12), impact platform (13), big cylinder body (a), little cylinder body (b), described big cylinder body (a) constitutes plenum chamber (6), described little cylinder body (b) constitutes low-pressure chamber (8), and little cylinder body (b) upper end links to each other with big cylinder body (a) lower end; Described cylinder cap (12) is loaded in big cylinder body (a) upper end, seals by grommet type seals (3) between big cylinder body (a) and the cylinder cap (12); Described piston (5) places in the plenum chamber (6), form the little air chamber of normal pressure (4) with closely contacting by O RunddichtringO (10) between the cylinder cap (12), piston (5) lower end central authorities with pass the second piston rod (7) that big cylinder body (a) diapire extends in the low-pressure chamber (8) and link to each other; Seal by three or six flap seal circles (9) between described second piston rod (7) and big cylinder body (a) diapire; Described piston (5) upper end central authorities link to each other with the lower end of the first stage piston bar (2) that passes cylinder cap (12), and the upper end of first stage piston (2) is connected in impact platform (13) lower end that complete elastic washer (1) is equipped with at its top; Piezoelectric ceramic actuator (11) is positioned at the outer upper end of casing wall of big cylinder body (a) and links to each other with two gas ports up and down, the casing wall that wherein descends gas port to pass big cylinder body (a) communicates with plenum chamber (6), and casing wall and cylinder cap (12) that last gas port passes big cylinder body (a) communicate with the little air chamber of normal pressure (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100661265A CN100386610C (en) | 2004-12-09 | 2004-12-09 | Pneumatic type multiple waveform active shock waveform generator |
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| CNB2004100661265A CN100386610C (en) | 2004-12-09 | 2004-12-09 | Pneumatic type multiple waveform active shock waveform generator |
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| CN100386610C true CN100386610C (en) | 2008-05-07 |
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| CN100365404C (en) * | 2005-06-10 | 2008-01-30 | 苏州东菱振动试验仪器有限公司 | Piston type high-acceleration impaction responding hammer for impaction testing table |
| CN103868805B (en) * | 2014-03-19 | 2016-01-20 | 中国人民解放军总参谋部工程兵科研三所 | A kind of dual drive for large-scale blast wave analogue means and driving method |
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| CN106525611B (en) * | 2016-11-08 | 2023-08-01 | 中国工程物理研究院总体工程研究所 | Blast wave model device with adjustable blast wave waveform |
| CN106768781B (en) * | 2017-01-10 | 2024-05-10 | 北京强度环境研究所 | Waveform generator for blocking impact test |
| CN106989886B (en) * | 2017-03-30 | 2020-09-29 | 西安从吾电子科技有限公司 | Mechanical structure collision performance simulation experiment platform |
| CN107505113B (en) * | 2017-08-30 | 2020-03-20 | 扬州昀昇电子科技有限公司 | Impact tester |
| CN109870343B (en) * | 2017-12-04 | 2022-03-15 | 中国飞机强度研究所 | Loading device capable of applying impact load and steady-state load in time sequence |
| CN109357847A (en) * | 2018-09-11 | 2019-02-19 | 中国飞机强度研究所 | A kind of high carrier wave shape generating assembly of wideband and the high carrier wave shape experimental rig of wideband |
| CN111912726B (en) * | 2020-06-29 | 2021-05-28 | 西安交通大学 | Particle flow emitting device |
| CN117191323B (en) * | 2023-09-11 | 2024-08-13 | 苏州世力源科技有限公司 | Waveform generation mechanism and impact test device |
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|---|---|---|---|---|
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| US20030116949A1 (en) * | 2001-12-25 | 2003-06-26 | Takata Corporation | Inflator with shock wave generator |
-
2004
- 2004-12-09 CN CNB2004100661265A patent/CN100386610C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104494A (en) * | 1985-06-28 | 1987-01-07 | 多里·扎克奎斯 | The high power elastic pulse generator that the impact that focuses in liquid produces |
| US20030116949A1 (en) * | 2001-12-25 | 2003-06-26 | Takata Corporation | Inflator with shock wave generator |
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