CN204422318U - The modified emitter of Hopkinson pull rod - Google Patents
The modified emitter of Hopkinson pull rod Download PDFInfo
- Publication number
- CN204422318U CN204422318U CN201520062071.4U CN201520062071U CN204422318U CN 204422318 U CN204422318 U CN 204422318U CN 201520062071 U CN201520062071 U CN 201520062071U CN 204422318 U CN204422318 U CN 204422318U
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- Prior art keywords
- piston
- end cap
- bullet
- sleeve
- gun tube
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Abstract
The utility model discloses a kind of modified emitter of Hopkinson pull rod, bullet outlet end cap circumference is symmetrical arranged perforate, and the piston rod of bounce cylinder stretches into stretching gun tube perpendicular to bullet outlet end cap along perforate; Piston promotes in the process of tubulose bullet, and when piston knocks bounce cylinder piston rod, piston is subject to cushioned resistance and increasing, and when this power is greater than the pressure that gas produces, piston completes and reduces speed now to after the acceleration of tubulose bullet; The utility model adopts bounce cylinder to carry out buffer deceleration to piston, effectively prevents the shock of piston and gun tube; Bounce cylinder is arranged on the support independent of experimental provision, thus avoids and clash into the signal produced and imported into by the inside of experimental provision own on the foil gauge that is affixed on test club; And eliminate former magnetic steel ring structure from the magnetic drag effect that just exists, higher speed can be reached after making bullet accelerated by piston, thus the more high strain-rate realizing laboratory sample loads.
Description
Technical field
The utility model belongs to material mechanical performance experiment field, particularly a kind of modified emitter of Hopkinson pull rod experimental provision.
Background technology
Separate type Hopkinson experimental provision based on one-dismensional stress wave theory becomes the important experiments experiment equipment of one of current research material dynamic mechanical performance, when material meets stress equilibrium, can obtain the dynamic mechanical of material.Along with the progress of technology and the needs of experiment material, be necessary to improve Hopkinson experimental provision.
Current scholar, for the research of Hopkinson pull rod and use, much concentrates on and eliminates high-frequency signal for the impact of device and reduce power system as far as possible and providing the energy loss in dynamic process.High-frequency signal may come from experimental situation, also may come from experimental provision itself; The interference of experimental situation is uncertain at random, but can realize the interference of experiment for improving experimental provision thus reducing.On current Hopkinson pull rod emitter, the fairly simple piston of many employings promotes bullet motion, when piston promotes to slow down to prevent piston from contacting with the hard of gun tube to piston after bullet accelerator terminates.In general device, " the modified Hopkinson pull rod emitter " of design as superfine in Zhao adopts magnetic steel ring magnetic to repel each other and avoids piston and gun tube generation hard contact, but because magnetic exists at the very start, so piston movement speed is obstructed, promote the reaction force attenuation of bullet motion, be unfavorable for that experiment reaches more high strain-rate.
Summary of the invention
The purpose of this utility model is to provide a kind of and reduces gas energy loss and the modified emitter of the stronger Hopkinson pull rod experimental provision of antijamming capability.
The technical solution realizing the utility model object is:
A kind of modified emitter of Hopkinson pull rod, comprise the gun tube base being arranged to and being fixed on horizontal stand, the sleeve of TOE, stretching gun tube, air intake opening end cap, bullet outlet end cap, tubulose bullet, stretching gun tube two ends are fixedly installed bullet outlet end cap and air intake opening end cap respectively, sleeve stretches into stretching gun tube through bullet outlet end cap, and be connected by screw thread and air intake opening end cap, band center pit piston center hole divides two sections, one sector hole footpath coordinates with the outside surface slipper seal of sleeve, another sector hole footpath is greater than the external diameter of sleeve, band center pit piston coordinates with stretching gun tube internal surface gaps, and the end face corresponding to the section of large aperture contacts with the inside surface of stretching gun tube air intake opening end cap, the cavity formed with center pit piston and sleeve is communicated with air intake opening, tubulose bullet is enclosed within sleeve, be slidably matched with sleeve, and one end contacts with the end face corresponding to the section of band center pit piston small-bore, bullet outlet end cap circumference is symmetrical arranged perforate, the piston rod of bounce cylinder stretches into stretching gun tube perpendicular to bullet outlet end cap along perforate, transfer block is fixed on the nearly bullet endpiece of sleeve lining by snap ring, straight-line ball guide pin bushing is fixed on transfer block inwall by snap ring, incident bar runs through whole emitter and straight-line ball guide pin bushing inwall clearance fit, ring flange is fixedly installed in one end of nearly bullet outlet end cap.
The utility model compared with prior art, its remarkable advantage:
(1) the utility model adopts bounce cylinder to carry out buffer deceleration to piston, effectively prevents the shock of piston and gun tube; Bounce cylinder is arranged on the support independent of experimental provision, thus avoids and clash into the signal produced and imported into by the inside of experimental provision own on the foil gauge that is affixed on test club.
(2) the utility model eliminate former magnetic steel ring structure from the magnetic drag effect that just exists, higher speed can be reached after making bullet accelerated by piston, thus the more high strain-rate realizing laboratory sample loads.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the modified emitter of the utility model Hopkinson pull rod.
Fig. 2 is the A-A cut-open view of the modified emitter of the utility model Hopkinson pull rod.
Embodiment
Composition graphs 1 and Fig. 2:
The modified emitter of a kind of Hopkinson pull rod of the utility model, comprise the gun tube base 11 being arranged to and being fixed on horizontal stand, the sleeve 10 of TOE, stretching gun tube 3, air intake opening end cap 6, bullet outlet end cap 2, tubulose bullet 4, stretching gun tube 3 two ends are fixedly installed bullet outlet end cap and air intake opening end cap respectively, sleeve 10 stretches into stretching gun tube 3 through bullet outlet end cap 2, and be connected by screw thread and air intake opening end cap 6, band center pit piston 5 center pit divides two sections, one sector hole footpath coordinates with the outside surface slipper seal of sleeve 10, another sector hole footpath is greater than the external diameter of sleeve 10, band center pore area center pit piston 5 coordinates with stretching gun tube 3 internal surface gaps, and the end face corresponding to the section of large aperture contacts with the inside surface of stretching gun tube 3 air intake opening end cap 6, be communicated with air intake opening with the cavity that sleeve 10 is formed with center pore area center pit piston 5, tubulose bullet 4 is enclosed within sleeve 10, be slidably matched with sleeve 10, and one end contacts with the end face corresponding to the section of pore area center pit piston 5 small-bore, band center, bullet outlet end cap 2 circumference is symmetrical arranged perforate, the piston rod of bounce cylinder 1 stretches into stretching gun tube 3 perpendicular to bullet outlet end cap 2 along perforate, transfer block 9 is fixed on the nearly bullet endpiece of sleeve 10 inwall by snap ring, straight-line ball guide pin bushing 8 is fixed on transfer block 9 inwall by snap ring, incident bar 7 runs through whole emitter and straight-line ball guide pin bushing 8 inwall clearance fit, ring flange is fixedly installed in one end of nearly bullet outlet end cap 2.
Bounce cylinder 1 is fixedly installed on the support independent of test unit, thus avoids and clash into the signal produced and imported into by the inside of experimental provision own on the foil gauge that is affixed on test club.
Be provided with ring groove with on the inner peripheral surface that center pore area center pit piston 5 and sleeve 10 are slidably matched, in ring groove, be provided with O RunddichtringO.
Principle of work:
Use tubulose bullet 4 to shift band center pit piston 5 inlet end of stretching gun tube 3 onto before stretching experiment, band center pit piston 5 is contacted with stretching gun tube air intake opening end cap 6.Opening cylinder makes gas enter stretching gun tube 3, gas push band center pit piston 5, and band center pit piston 5 promotes tubulose bullet 4 to carry out accelerating and finally to penetrate from stretching gun tube 3.Tubulose bullet 4 clashes into the ring flange of incident bar 7 near bullet outlet end cap 2 end subsequently, then produces wave of compression, and wave of compression reflects to form stretching ripple at the ring flange other end, and data collecting card collects the voltage signal that on incident bar 7, foil gauge produces.
Promote in the process of tubulose bullet 4 at gas push band center pit piston 5, band center pit piston 5, when being with center pit piston 5 to knock bounce cylinder 1 piston rod, band center pit piston 5 is subject to cushioned resistance and increasing, when this power is greater than the pressure of gas generation, band center pit piston 5 completes and reduces speed now to after the acceleration of tubulose bullet 4.Center pit piston 5 speed is with to reduce to zero subsequently, bounce cylinder 1 backhaul the counter motion of push belt center pit piston 5; After band center pit piston 5 speed reduces to zero again, counter motion again; So repeatedly until stop.Gas in stretching gun tube 3 is released by gap between part gradually.
Claims (3)
1. the modified emitter of a Hopkinson pull rod, it is characterized in that: comprise the gun tube base (11) being arranged to and being fixed on horizontal stand, the sleeve (10) of TOE, stretching gun tube (3), air intake opening end cap (6), bullet outlet end cap (2), tubulose bullet (4), stretching gun tube (3) two ends are fixedly installed bullet outlet end cap and air intake opening end cap respectively, sleeve (10) stretches into stretching gun tube (3) through bullet outlet end cap (2), and be connected by screw thread and air intake opening end cap (6), band center pit piston (5) center pit divides two sections, one sector hole footpath coordinates with the outside surface slipper seal of sleeve (10), another sector hole footpath is greater than the external diameter of sleeve (10), band center pit piston (5) coordinates with stretching gun tube (3) internal surface gaps, and the end face corresponding to the section of large aperture contacts with the inside surface of stretching gun tube (3) air intake opening end cap (6), band center pit piston (5) is communicated with air intake opening with the cavity that sleeve (10) is formed, tubulose bullet (4) is enclosed within sleeve (10), be slidably matched with sleeve (10), and one end contacts with the end face corresponding to the section of band center pit piston (5) small-bore, bullet outlet end cap (2) circumference is symmetrical arranged perforate, the piston rod of bounce cylinder (1) stretches into stretching gun tube (3) perpendicular to bullet outlet end cap (2) along perforate, transfer block (9) is fixed on the nearly bullet endpiece of sleeve (10) inwall by snap ring, straight-line ball guide pin bushing (8) is fixed on transfer block (9) inwall by snap ring, incident bar (7) runs through whole emitter and straight-line ball guide pin bushing (8) inwall clearance fit, ring flange is fixedly installed in one end of nearly bullet outlet end cap (2).
2. the modified emitter of Hopkinson pull rod according to claim 1, is characterized in that: described bounce cylinder (1) is fixedly installed on the support independent of test unit.
3. the modified emitter of Hopkinson pull rod according to claim 1 and 2, it is characterized in that: the inner peripheral surface that described band center pit piston (5) and sleeve (10) are slidably matched is provided with ring groove, in ring groove, is provided with O RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062071.4U CN204422318U (en) | 2015-01-28 | 2015-01-28 | The modified emitter of Hopkinson pull rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062071.4U CN204422318U (en) | 2015-01-28 | 2015-01-28 | The modified emitter of Hopkinson pull rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204422318U true CN204422318U (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520062071.4U Expired - Fee Related CN204422318U (en) | 2015-01-28 | 2015-01-28 | The modified emitter of Hopkinson pull rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204422318U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614230A (en) * | 2015-01-28 | 2015-05-13 | 南京理工大学 | Improved firing device of split Hopkinson torsion bar |
| CN107101797A (en) * | 2017-06-01 | 2017-08-29 | 南京理工大学 | A kind of tubular experimental provision for measuring buffer shock resistance |
| CN108333040A (en) * | 2018-02-01 | 2018-07-27 | 石家庄铁道大学 | A kind of Hopkinson pressure bar gas big gun transmitting tube for capableing of automatic Loading bullet |
| CN110553935A (en) * | 2019-10-16 | 2019-12-10 | 浙江科技学院 | dynamic punching joint cutting method |
| CN111912726A (en) * | 2020-06-29 | 2020-11-10 | 西安交通大学 | Particle flow emitting device |
-
2015
- 2015-01-28 CN CN201520062071.4U patent/CN204422318U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614230A (en) * | 2015-01-28 | 2015-05-13 | 南京理工大学 | Improved firing device of split Hopkinson torsion bar |
| CN107101797A (en) * | 2017-06-01 | 2017-08-29 | 南京理工大学 | A kind of tubular experimental provision for measuring buffer shock resistance |
| CN107101797B (en) * | 2017-06-01 | 2023-08-04 | 南京理工大学 | Cylindrical experimental device for measuring shock resistance of buffer |
| CN108333040A (en) * | 2018-02-01 | 2018-07-27 | 石家庄铁道大学 | A kind of Hopkinson pressure bar gas big gun transmitting tube for capableing of automatic Loading bullet |
| CN108333040B (en) * | 2018-02-01 | 2020-11-10 | 石家庄铁道大学 | Hopkinson pressure bar air cannon launching tube capable of automatically loading bullets |
| CN110553935A (en) * | 2019-10-16 | 2019-12-10 | 浙江科技学院 | dynamic punching joint cutting method |
| CN111912726A (en) * | 2020-06-29 | 2020-11-10 | 西安交通大学 | Particle flow emitting device |
| CN111912726B (en) * | 2020-06-29 | 2021-05-28 | 西安交通大学 | Particle flow emitting 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20180128 |