CN102121869A - Pneumatic shock response spectrum tester - Google Patents
Pneumatic shock response spectrum tester Download PDFInfo
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- CN102121869A CN102121869A CN 201010571877 CN201010571877A CN102121869A CN 102121869 A CN102121869 A CN 102121869A CN 201010571877 CN201010571877 CN 201010571877 CN 201010571877 A CN201010571877 A CN 201010571877A CN 102121869 A CN102121869 A CN 102121869A
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Abstract
The invention relates to a pneumatic shock response spectrum tester, which comprises a base, a pneumatic hammerhead device, a resonant panel supporting device and a functional mechanism. The pneumatic hammerhead device comprises a hammerhead, guide rails and an internal cylinder, wherein one end of the internal cylinder is in sliding sealing with an open hole at one end of the hammerhead; grooves on the two sides of the hammerhead are clamped in the two symmetrically arranged guide rails; the guide rails are fixed on the base axially; a screw shaft at an end cover of the internal cylinder is connected with a joint bearing which is connected with a lug of an internal cylinder connecting block by a pin; and the bottom surface of the internal cylinder connecting block is fixed on the base by a thrust cylinder connecting seat. The resonant panel supporting device comprises a resonant panel, limiting clamping blocks, round rolling bars and a cushioning seat, wherein V-shaped grooves on the two sides of the resonant panel are clamped in a plurality of symmetrically arranged limiting clamping blocks; the resonant panel is supported by the round rolling bars fixed on a round bar mounting seat; and the limiting clamping blocks and the round bar mounting seat are fixed on the base. The pneumatic shock response spectrum tester is simply and compactly structured, simple and convenient to operate, short in stroke, high in excitation energy, convenient to arrange and maintain, safe and environment-friendly.
Description
Technical field
The present invention relates to a kind of impact testing machine, relate in particular to a kind of pneumatic type shock response spectrum testing machine.
Background technology
The simulation of classical shock waveform adopts free drop type impact testing machine to realize mostly, but the impact that the emission of various firer's devices cause on the spacecraft blast impulse, rocket or shell causes airborne equipment etc., be a kind of surge waveform of complex oscillation, obviously can not correspond to actual needs if still carry out ground simulation test with classical surge waveform.Generally adopt the principle Simulation of Complex oscillation mode surge waveform of equivalent damage both at home and abroad, that is, and with the standard of shock response spectrum as the simulation shock environment.
The method of the test of existing shock response spectrum mainly contains following three classes: (1) priming system blast mode; (2) simulation of mechanical analogue method (3) shaking table.Priming system blast mode modelling technique has simulation accurately, acceleration and frequency range height, but testing expenses are big, poor stability, and loading magnitude discreteness is big; Shaking table analog form equipment code, simulated cost is low, the controllability height, but that this mode is tested magnitude is low.
The response spectra analogy method of present medium and small magnitude blast impulse is mainly based on the mechanical analogue method, and pendulum shock response spectrum testing machine is most widely used a kind of in the mechanical analogue method.Pendulum response spectra testing machine mainly is made up of resonant panel, pendulum, pendulum lifting gear, base.The testing machine lifting gear generally uses reducing motor, and electromagnetic clutch is installed in the middle of motor output shaft and the pendulum, after the driven by motor pendulum turns to the setting pivot angle, motor stops, and discharges electromagnetic clutch, the pendulum free-falling, bump is installed in the resonant panel on the base, produces the oscillatory surge waveform.Testing machine is realized different impact accelerations by the weight of adjustment pendulum and the height of lifting; The mat of different-stiffness can be installed between resonant panel and the pendulum, with the pulse width of adjusting surge waveform, thus the break frequency of adjustment response spectra; Adjust the support stiffness between resonant panel rear portion and the base, can adjust the rate of rise of response spectra.Its load capacity of pendulum response spectra testing machine can reach 200kg, break frequency 100～1500Hz, maximum shock response spectrum peak value 35000m/s
2(damping ratio 5%, Q=10).
Pendulum response spectra testing machine technology comparative maturity is present main a kind of shock response spectrum test method.But pendulum shock response spectrum testing machine has following shortcoming:
(1) it is limited that the pendulum freely falling body produces excitation energy, bigger if desired impact energy needs to increase the quality of pendulum and the radius of pendulum, and not only reducing motor and clutch power consumption are big, and take bigger locus, need special security protection;
(2) adopt electromagnetic clutch adhesive oscillating weight axle to prevent the bounce-back of pendulum secondary, clutch coupling withstand shocks load, damage and wear easily;
(3), install and very inconvenience of maintenance because reducing motor and clutch coupling are installed in very high position.
Summary of the invention
The object of the present invention is to provide a kind of pneumatic type shock response spectrum testing machine, it is simple and compact for structure, stroke is short, excitation energy is big, easy to installation and maintenance, thereby has overcome deficiency of the prior art.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of pneumatic type shock response spectrum testing machine comprises that base and the air pressure that is installed on the base drive tup device, resonant panel bracing or strutting arrangement and functional entity, and described functional entity comprises braking mechanism, latch mechanism and return mechanism; It is characterized in that:
Described air pressure drives the tup device and comprises tup, two guide rails and inner casing, inner casing one end inserts in the perforate of tup one end, and with the tup slipper seal, the groove on tup both sides is fastened in symmetrically arranged two guide rails, guide rail is fixed on the base vertically, the screw axis of inner casing end caps is connected with oscillating bearing, and the auricle of oscillating bearing and inner casing contiguous block is by the screw axis pin joint, and inner casing contiguous block underrun thrust cylinder Connection Block is fixed on the base;
Described resonant panel bracing or strutting arrangement comprises that resonant panel, four are with upper limit fixture block, two gentle red seats of rolling poles, the V-type groove of resonant panel both sides be stuck in symmetrically arranged four with in the upper limit fixture block, resonant panel is supported by the rolling pole that is fixed on the pole mount pad, and spacing fixture block and pole mount pad are fixed on the base.
Further say, be press-fitted copper sheathing in one end of described tup perforate, and the circumferential fixedly connected outer shell end socket in the upper edge, outer face of tup one end, be arranged at and be provided with radial direction seal ring and end-face seal ring in the groove on the outer shell end socket, radial direction seal ring and inner casing slipper seal, end-face seal ring compress the outer face of tup by the outer shell end socket.
Described resonant panel connects waveform generator near an end of tup, and the other end is horizontally fixed on the buffing pad by adjustable cushion, and buffing pad is fixed on the base
Inner one side, described guide rail upper end is the inclined-plane, and the groove on tup both sides is stuck in the guide rail, and is clearance fit with guide rail.
Chamfered portion in the groove of described tup both sides is pasted guide rail and is pasted.
Described latch mechanism comprises locking cylinder, locking tongue and locking tongue cover, and locking tongue cover is installed in the both sides of base, and the piston rod of locking cylinder connects the locking tongue, and the locking tongue is arranged in the locking tongue cover.
Described braking mechanism comprises brake cylinder, brake axle, skidding piece and brake axle sleeve, and the brake axle sleeve is installed in the both sides of base, and the piston rod of brake cylinder connects an end of brake axle, and the other end of brake axle is fixed with the skidding piece.
The following installation brake framework of described tup is installed latch segment on the side plate of brake framework both sides, and the return jacking block is installed in brake back-end framework center.
Described return mechanism adopts the return cylinder, and return cylinder level is installed on the return cylinder block, and the return cylinder block is fixed on the bottom of base.
Described tup is an aluminum casting.
Described inner casing 5 external diameter Φ 100～Φ 200mm, tup 10 movement travels are 300～500mm, charge pressure 0.1～0.6MPa.
Described locking cylinder nominal diameter Φ 125～Φ 160mm, thrust stroke 50mm, charge pressure 0.2～0.6MPa;
Described brake cylinder nominal diameter Φ 125～Φ 160mm, thrust stroke 50mm, charge pressure 0.2～0.6MPa;
Described return cylinder nominal diameter Φ 100～Φ 120mm, thrust stroke 600～800mm, charge pressure 0.1～0.6MPa;
When the present invention works, trial target is fixed on the resonant panel, return cylinder charge, return piston rod stretch out and withstand on the return jacking block, promote the excitation table top and are returned to locked position.Locking cylinder inflation, locking cylinder piston rod promote the locking tongue and hold out against latch segment, behind the locking tup, after inner casing was inflated to set pressure, latch mechanism discharged, tup accelerated motion, strike on the waveform generator of resonant panel front, on resonant panel, produce surge waveform, be delivered on the trial target.Tup resilience simultaneously, the brake cylinder inflation, the brake cylinder piston rod stretches out, and compresses brake framework side braking tup by the skidding piece.By changing the size of charge pressure, the quality of tup can obtain different excitation energies; Adjust the rigidity of waveform generator, can adjust the pulse width of impact, obtain different response spectra break frequencies; Adjust the rigidity of adjustable cushion, can adjust the rate of rise of response spectra low-frequency range, to satisfy the requirement of different response spectra test specification.
Because the use of technique scheme, the present invention compared with prior art has following advantage:
(1) cylinder in tup device, latch mechanism, braking mechanism and the return mechanism all adopts less than the 0.6MPa low-pressure air and is power, and is simple in structure, safe and reliable, environment friendly and pollution-free;
(2) adopting expansion cylinder is power, and in tup accelerated motion process, thrust loss is little, reaches required impact end speed, only needs than short stroke, and occupation area of equipment is little;
(3) can increase the two inner casing modes of interior cylinder diameter or employing and increase excitation energy, carry out heavy load and test with the big shock response spectrum that transships;
(4) on the tup counterweight can be installed, easily increase the quality of tup, satisfy response spectra testing requirements on a large scale;
(5) by accurately regulating the impact end speed of charge pressure control tup, the good reproducibility of impact.
Description of drawings
Fig. 1 is the actuating device of atmospheric pressure structural drawing of pneumatic type shock response spectrum testing machine in a preferred embodiment of the present invention;
Fig. 2 is the front view of pneumatic type shock response spectrum testing machine in a preferred embodiment of the present invention;
Fig. 3 is the left view of pneumatic type shock response spectrum testing machine in a preferred embodiment of the present invention;
Fig. 4 is the resonant panel supporting construction figure of pneumatic type shock response spectrum testing machine in a preferred embodiment of the present invention;
Fig. 5 is the return mechanism scheme of installation of pneumatic type shock response spectrum testing machine in a preferred embodiment of the present invention;
More than the parts of Reference numeral shown in each figure and indication thereof be respectively: 1 thrust cylinder Connection Block; 2 inner casing contiguous blocks; 3 screw axis; 4 oscillating bearings; 5 inner casings; 6 radial direction seal rings; 7 cylinder end sockets; 8 end-face seal rings, 9 copper sheathings; 10 tups; 11 bases; 12 guide rails; 13 brake cylinders; 14 locking cylinders; 15 waveform generators; 16 resonant panels; 17 spacing fixture blocks; 18 adjustable cushions; 19 buffing pads; 20 locking tongues; 21 locking tongue covers; 22 latch segments; 23 brake frameworks; 24 skidding pieces; 25 brake axle sleeves; 26 brake axles; 27 pole mount pads; 28 rolling poles; 29 return jacking blocks; 30 return cylinder blocks; 31 return cylinders.
Embodiment
Below in conjunction with an accompanying drawing and a preferred embodiment technical scheme of the present invention is elaborated.
The pneumatic type shock response spectrum testing machine maximum load 200kg of present embodiment, resonant panel size (length * wide * height) 600mm * 500mm * 40mm, weight 135kg.Tup size (long * wide) 800mm * 500mm adopts the wrought aluminium tup, weight 200kg, tup inner chamber body diameter 160mm, maximum stroke movement 350mm.The key technical indexes that can reach is:
1) break frequency: 100～1500Hz is adjustable;
2) maximum shock response spectrum peak value: 35000m/s
2
Require less testing machine for load quality, can reduce the tup quality and reduce tup inner chamber body diameter.Bigger if desired exciting force and excitation quality can select for use the steel table top to increase the tup quality, to strengthen tup inner chamber body diameter or adopt two cylinder arrangement simultaneously.
The pressurized air of present embodiment provides rated pressure 0.7MPa by same air compressor.Locking cylinder diameter 125mm, cylinder stroke 50mm, locking pressure is not more than 0.3MPa.Brake cylinder diameter 125mm, cylinder stroke 50mm, brake pressure according to its range of adjustment of driving pressure size at 0.3～0.6MPa.Return cylinder bore 100mm, cylinder stroke 600mm, return cylinder charge pressure 0.2～0.3MPa.
Consult Fig. 1-5, the parts of present embodiment and annexation thereof are:
The groove on tup 10 both sides is stuck in the guide rail 12 of both sides, and guide rail 12 is screwed vertically on base 11; The screw axis and the oscillating bearing 4 of inner casing 5 end caps are threaded, insert screw axis 3 in the pin hole of oscillating bearing 4 and the inner casing contiguous block 2 auricle holes, the bottom surface of inner casing contiguous block 2 is connected on the thrust cylinder Connection Block 1 with screw, and thrust cylinder Connection Block 1 is screwed on base 11; Tup 10 perforates one end is press-fitted copper sheathing 9, and outer shell end socket 7 circumferentially is screwed on the outer face of tup 10, and radial direction seal ring 6 and end-face seal ring 8 are placed in the groove of potting head 7 outside; Radial direction seal ring 6 and inner casing 5 slipper seals, end-face seal ring 8 compresses the outer face of tup 10 by the mounting screw of outer shell end socket 7.
Locking tongue cover 21 is installed in the both sides of base 11, and locking tongue cover 21 is screwed on base 11, and locking cylinder 14 is installed in the locking tongue and overlaps 21 outsides, and locking cylinder 14 piston rod threads are connected with locking tongue 20.
In the both sides of base 11 brake axle sleeve 25 is installed, brake axle sleeve 25 is screwed on base 11, brake cylinder 13 is installed in brake axle sleeve 25 outsides, and brake cylinder 13 piston rod threads are connected with brake axle 26, on the skidding piece 24 usefulness screws on brake axle 26 outer faces.
The bottom of base 11 is screwed return cylinder block 30, and return cylinder 31 usefulness screw levels are installed in the outside of return cylinder block 30.
During work, two locking cylinder 14 inflations, locking tongue 20 stretches out, and pushes down latch segment 22, locking tup 10.Inner casing 5 begins inflation then, after pressure in the adjusting cylinder is setting value, locking cylinder 14 venting, locking tongue 20 discharges under the thrust of tup 10 automatically, tup 10 under the effect of air pressure behind the certain stroke of accelerated motion on the guide rail 12, waveform generator 15 on the bump resonant panel 16, produce corresponding surge waveform, control rapid-release valve simultaneously and discharge gas in the inner casing 5, and control brake cylinder 13 inflations, brake axle 26 stretches out, and drives skidding piece 24 and clamps brake framework 23, prevents the secondary bounce-back.Return cylinder 31 inflations after impact is finished, return cylinder 31 piston rods stretch out, and promote the return jacking block 29 of installation on the brake framework 23, make tup 10 get back to reference position.
In the present embodiment, one side guide rail 12 upper ends inner be the inclined-plane, adopt surface rail, adjust tup draw-in groove and guide rail side tolerance clearance easily, the tolerance clearance about as far as possible reducing guarantees that transverse movement is little in impact process.
In the present embodiment, the part that tup 10 and guide rail 12 cooperate is stained with guide rail and pastes, and avoids aluminium to wear and tear on steel guide rail on the one hand, increases the serviceable life of machine; Reduced friction force on the other hand, made working table movement more flexible.
In the present embodiment, inner casing 5 is a fixed part, and it is by oscillating bearing, screw axis, inner casing contiguous block, thrust cylinder Connection Block, and the final sum base connects.The middle oscillating bearing of installing can compensate tup rocking within the specific limits, and the protection cylinder is not fragile.
In the present embodiment, tup 10 cavity forward part are press-fitted one section copper sheathing 9, and inner casing 5 is slidingly matched on copper sheathing 9, reduce on the one hand haveing suffered the requirement on machining accuracy of the outer inside wall of cylinder, and reduce the force of sliding friction of interior outer shell.
In the present embodiment, the charge pressure of inner casing 5 can be regulated between 0.1～0.6MPa, thereby regulates the impact initial velocity of tup 10.
In the present embodiment, waveform generator 15 diameter of phi 120mm, thickness 5mm hair is sticking to be made, and in order to obtain different shock pulse width, it is sticking to paste the multilayer hair.If require the shock pulse width littler, with the ox-hide pad of available same diameter.
In the present embodiment, adjustable cushion 18 usefulness diameter of phi 160mm, thickness 5mm hair is sticking to be made, and when adjusting the response spectra slope, can stack the multilayer hair and glue.Rigidity is littler if desired, can adopt the rubber slab of same diameter.
Pneumatic type shock response spectrum testing machine structure of the present invention is simple compact, stroke is short, excitation energy is big, easy to installation and maintenance, and safety and environmental protection.
Above-mentioned preferred embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. a pneumatic type shock response spectrum testing machine comprises that base and the air pressure that is installed on the base drive tup device, resonant panel bracing or strutting arrangement and functional entity, and described functional entity comprises braking mechanism, latch mechanism and return mechanism; It is characterized in that:
Described air pressure drives the tup device and comprises tup (10), article two, guide rail (12) and inner casing (5), inner casing (5) one ends insert in the perforate of tup (10) one ends, and with tup (10) slipper seal, the groove on tup (10) both sides is fastened in symmetrically arranged two guide rails (12), guide rail (12) is fixed on the base (11) vertically, the screw axis of inner casing (5) end caps is connected with oscillating bearing (4), the auricle of oscillating bearing (4) and inner casing contiguous block (2) is by screw axis (3) pin joint, and inner casing contiguous block (2) underrun thrust cylinder Connection Block (1) is fixed on the base (11);
Described resonant panel bracing or strutting arrangement comprises that resonant panel (16), four are with upper limit fixture block (17), two rolling poles (28) and buffing pad (19), the V-type groove of resonant panel (16) both sides be stuck in symmetrically arranged four with in the upper limit fixture block (17), resonant panel (16) is supported by the rolling pole (28) that is fixed on the pole mount pad (27), and spacing fixture block (17) and pole mount pad (27) are fixed on the base (11).
2. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, be press-fitted copper sheathing (9) in one end of described tup (10) perforate, and the circumferential fixedly connected outer shell end socket in upper edge, outer face (7) of tup (10) one ends, be arranged at and be provided with radial direction seal ring (6) and end-face seal ring (8) in the groove on the outer shell end socket (7), radial direction seal ring (6) and inner casing (5) slipper seal, end-face seal ring (8) compresses the outer face of tup (10) by outer shell end socket (7).
3. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, described resonant panel (16) connects waveform generator (15) near an end of tup (10), the other end is horizontally fixed on the buffing pad (19) by adjustable cushion (18), and buffing pad (19) is fixed on the base (11)
4. pneumatic type shock response spectrum testing machine according to claim 1 is characterized in that, described guide rail (12) one side the upper end inner be the inclined-plane, the groove on tup (10) both sides is stuck in the guide rail (12), and is clearance fit with guide rail (12).
5. according to claim 1 or 4 described pneumatic type shock response spectrum testing machines, it is characterized in that the chamfered portion in the groove of described tup (10) both sides is pasted guide rail and pasted.
6. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, described latch mechanism comprises locking cylinder (14), locking tongue (20) and locking tongue cover (21), locking tongue cover (21) is installed in the both sides of base (11), the piston rod of locking cylinder (14) connects locking tongue (20), and locking tongue (20) is arranged in the locking tongue cover (21).
7. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, described braking mechanism comprises brake cylinder (13), brake axle (26), skidding piece (24) and brake axle sleeve (25), brake axle sleeve (25) is installed in the both sides of base (11), the piston rod of brake cylinder (13) connects an end of brake axle (26), and the other end of brake axle (26) is fixed with skidding piece (24).
8. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, the following installation brake framework (23) of described tup (10) is installed latch segment (22) on the side plate of brake framework (23) both sides, and return jacking block (29) is installed in brake framework (23) center, rear end.
9. pneumatic type shock response spectrum testing machine according to claim 1, it is characterized in that, described return mechanism adopts return cylinder (31), and return cylinder (31) level is installed on the return cylinder block (30), and return cylinder block (30) is fixed on the bottom of base (11).
10. according to each described pneumatic type shock response spectrum testing machine among the claim 1-4, it is characterized in that described tup (10) is an aluminum casting.
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| CN2010105718778A CN102121869B (en) | 2010-12-03 | 2010-12-03 | Pneumatic shock response spectrum tester |
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| CN2010105718778A CN102121869B (en) | 2010-12-03 | 2010-12-03 | Pneumatic shock response spectrum tester |
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| CN102502240A (en) * | 2011-10-28 | 2012-06-20 | 无锡双益精密机械有限公司 | Multi-station conveying device |
| CN102788676A (en) * | 2012-09-03 | 2012-11-21 | 苏州世力源科技有限公司 | Pneumatic type high acceleration vertical impact table |
| CN104089833A (en) * | 2014-07-22 | 2014-10-08 | 南昌航空大学 | Pneumatic material impact test device simulating shooting of bullet (cannonball) |
| CN105387986A (en) * | 2015-11-25 | 2016-03-09 | 浙江吉利汽车研究院有限公司 | Power device for auto part impact test |
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| CN102502240A (en) * | 2011-10-28 | 2012-06-20 | 无锡双益精密机械有限公司 | Multi-station conveying device |
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| CN102788676B (en) * | 2012-09-03 | 2015-03-18 | 苏州世力源科技有限公司 | Pneumatic type high acceleration vertical impact table |
| CN104089833A (en) * | 2014-07-22 | 2014-10-08 | 南昌航空大学 | Pneumatic material impact test device simulating shooting of bullet (cannonball) |
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