Shock testing machine
阅读：404发布：2023-07-31
专利汇可以提供Shock testing machine专利检索，专利查询，专利分析的服务。并且A shock testing machine is described which has the capability of selectively programming an infinite variety of shock pulse forms to be induced into a test specimen. The test specimen is mounted on a carriage which impacts a piston slidably mounted in a cylinder forming a part of the reaction mass base of the machine. Gas pressure, within the cylinder, provides a resilient force on the piston and is controlled by the scheduled flow of an electroviscous liquid into and out of the cylinder under the influence of variable electrical field means.，下面是Shock testing machine专利的具体信息内容。
1. A shock testing machine comprising: a reaction mass base member, a carriage member, having a test specimen mounted thereon, movable toward said base member, an impact cylinder mounted on one of said members, a piston facing the other of said members and slidably mounted in the impact cylinder in the direction of carriage movement, means for sealing the impact cylinder, and means, effective upon impact of said carriage member on said piston, for scheduling gas pressure in said impact cylinder and providing a predetermined, variable force on said piston including means for controlling the flow of an incompressible liquid into and out of the impact cylinder to induce a desired shock pulse form in the test specimen on the carriage.
2. A shock testing machine as in claim 1 wherein means are provided for venting said impact cylinder to atmosphere and pessurizing it from a source of pressurized gas.
3. A shock testing machine as in claim 1 wherein said gas pressure scheduling means further includes adjustable synchronizing means for actuating the liquid flow control means in predetermined timed relationship to impact with said piston.
4. A shock testing machine as in claim 1 wherein the incompressible liquid is an electro-viscous liquid and the flow control means comprise electro-hydraulic valve means for providing a variable strength electrical field on the electro-viscous liquid.
5. A shock testing machine as in claim 4 wherein: the one member in which the impact member is mounted is the reaction mass base member, a pair of tanks are provided, conduits respectively connect said tanks with said impact cylinder, and the electro-hydraulic valve means include electro-hydraulic valves interposed in said conduits.
6. A shock testing machine as in claim 5 fuRther including means for selectively sealing said tanks, venting them to atmosphere and pressurizing them with gas whereby the tanks may be alternately employed as a supply for and receiver of electro-viscous liquid flowing into and out of said impact cylinder.
7. A shock testing machine as in claim 6 wherein said gas pressure scheduling means further includes adjustable synchronizing means for actuating the liquid flow control means in predetermined timed relationship to impact of the carrige with said piston.
8. A shock testing machine as in claim 7 wherein the gas pressure scheduling means include complex waveform generator means actuated by said synchronizing means and varying the electrical field strength of the electro-hydraulic valves.
9. A shock testing machine as in claim 8 wherein means are provided for venting said impact cylinder to atmosphere and connecting it to a source of pressurized gas.
10. A shock pulse programmer for a shock testing machine comprisng a pair of members including a reaction mass base member and a test specimen bearing carriage member movable toward said base member, said programmer comprising: an impact cylinder adapted to be mounted on one of the testing machine members, a piston adapted to face and be impacted by the other testing machine member, said piston being sealingly and slidably mounted in the impact cylinder in the direction of carriage movement, and means, effective upon impact with said piston for scheduling gas pressure in said impact cylinder including means for controlling the flow of an incompressible liquid into and out of the impact cylinder to provide a predetermined, variable force on said piston thereby inducing a desired shock pulse form in the test specimen.
11. A shock pulse programmer as in claim 10 wherein said gas pressure scheduling means further includes adjustable synchronizing means for actuating the liquid flow control means in predetermined timed relationship to impact with said piston.
12. A shock pulse programmer as in claim 10 wherein the incompressible liquid is an electro-viscous liquid and the flow control means comprise electro-hydraulic valve means for providing a variable strength electrical field on the electro-viscous liquid.
13. A shock pulse programmer as in claim 12 wherein: the impact cylinder is adapted to be mounted on the reaction mass base member, a pair of tanks are provided, conduits respectively connect said tanks with said impact cylinder, the electro-hydraulic valve means include electro-hydraulic valves interposed in said conduits, and means are provided for selectively and respectively sealing said tanks and impact cylinder, venting them to atmosphere and connecting them with a source of pressurized gas.
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