Large-load high-g-value pneumatic vertical impact testbed

Abstract

The invention provides a large-load high-g-value pneumatic vertical impact testbed, mainly including five parts, i.e., a housing assembly, an anvil block assembly, a working table board assembly, a clamping release assembly and a cylinder assembly. The impact testbed performs two-stage expansion in a driving cylinder to push a driving piston to accelerate vertically downwards, explosion energy of an air cannon is large, a test piece on the testbed obtains large-magnitude impact acceleration, driving of the working table board assembly is realized through cooperation of the air cannon with the driving cylinder and driving piston, a sealing ring does not need to be arranged between the driving piston and the driving cylinder, and frictional resistance during vertical movement of the working table board assembly can nearly be ignored; and thus a load that can be loaded on a working table board can be effectively increased, making an impact test of a large-load test piece possible. At the same time, the testbed also has the advantages of compact structure, simple structure of constituent parts, easy machining, relatively low cost and the like.

Description

technical field [0001] The invention relates to the technical field of impact testing and experiments in mechanical environments, in particular to a large-load high-g-value pneumatic vertical impact test bench. Background technique [0002] In the environment of high-g acceleration shock, system components will bear huge inertial loads. In order to ensure that the system has a high resistance to shock overload and ensure that the system can operate normally under high-g shock environments, components and their systems must be Conduct high-g impact environmental tests to verify its reliability. For components with small mass and volume, the impact test can be realized by using the existing Hopkinson pressure rod device, pendulum device, vertical impact device, air cannon, live ammunition shooting and other technologies. Hopkinson compression rod technology can realize high-g impact environment with impact acceleration of 100,000 g to 200,000 g, pulse width of hundreds to ten...

AI Technical Summary

Problems solved by technology

However, this kind of acceleration shock test bench cannot meet the high-g shock test tests with a large mass of the tested part (such as tens or even hundreds of kilograms), an impact acceleration of several thousand g values, and a pulse width of milliseconds to tens of milliseconds. , so it is still necessary to study the impact test bench with large load and high g value

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