A dynamic unbalance impulse test device

Abstract

The invention discloses a test device for dynamic unbalanced impulse, which includes a moving frame part, a fixed frame part, and a data acquisition and processing device, wherein the moving frame part includes a positioning plate, two guide rails, a firing mechanism, a displacement sensor, an acceleration sensor, a suspension Type magnetic block, locking device, fixing mechanism, snap ring, upper plate, positioning rod, clamp, connecting plate, lower plate, sliding device and column. The present invention avoids the situation that the dynamic unbalance impulse cannot be tested directly, reliably, stably and conveniently at the current stage; the axis of the system and the axis of the moving frame part are the same axis, which reduces the moment resistance generated not in the same axis.

Description

technical field [0001] The invention belongs to the impulse test technology, in particular to a dynamic unbalance impulse test device. Background technique [0002] The traditional impulse test adopts the pendulum method, the processing method is outdated, the equipment is complicated, and it is easily disturbed by external conditions. Now the impulse test is changing to the guide rail method, but the common guide rail method test device has a simple structure, is unstable, and is susceptible to various interferences. For this reason, some high-precision, high-stability impulse testing devices have been developed in the prior art. For example, the patent (201110160628.4) of the Beijing Institute of Mechanical Equipment proposes "a test device for unbalanced impulse". This technical solution also uses the guide rail method, and the test method for the launch tube through the sensor is the impact pendulum method, which is an indirect measurement device. . The disadvantage i...

AI Technical Summary

Problems solved by technology

The disadvantage is that more supporting measuring equipment is required, the structure is complex, the data processing of the equipment is cumbersome, and the accuracy is not high. The accumulated value of the test is integrated to obtain the unbalanced impulse of the launch tube

Although this technical solution can theoretically obtain the force impulse of the launch tube, there are obvious deficiencies: ① Rolling bearings are used to make non-fixed contact with the launch tube. There is relative friction between the cylinder and the rolling bearing, these two points lead to a large error in the measurement

②As the launch tube moves, its center of gravity moves, which is not on the same axis as the centers of the two rolling bearings, further increasing the error

③Simple structure, poor stability and implementability

[0003] Liu Jinbiao's patent (201320792133.8) proposes "a testing device for rocket firework launch momentum". This technical solution uses pressure sensors to dynamically capture the launch force changes during rocket firework launch to calculate the rocket firework momentum changes. There are obvious deficiencies: ①The explosion produces a lot of light and heat, and the data collection error is relatively large; ②In order to avoid the explosion, there is a blast hole inside, which also reduces the accuracy of the device

This measurement method has the following deficiencies: ①The gas produced by the weapon launch affects the optical measurement of the device; ②For the weapon launch device, the impulse is obtained by testing the mass block, which increases the experimental error

There are the following deficiencies: ①The mass of the weapon launching device is too heavy, which produces a large gravity on a single side swing arm, and there are errors; ②It cannot meet the test environment with a large impulse generated by weapon launching

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