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A loading device capable of sequentially applying impact loads and steady-state loads

A technology of impact load and loading device, which is applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., which can solve the problems of low frequency response, high cost, and increased flow rate.

Active Publication Date: 2022-03-15
CHINA AIRPLANT STRENGTH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the incompressibility of the fluid, the frequency response of this type of device is generally low, usually tens of Hz. If a higher response frequency is required, the flow rate needs to be increased, which is expensive

Method used

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  • A loading device capable of sequentially applying impact loads and steady-state loads
  • A loading device capable of sequentially applying impact loads and steady-state loads

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Embodiment Construction

[0022] The following describes the implementation of the technical solution of the present invention in detail in conjunction with the accompanying drawings.

[0023] The loading device includes a loading piston 1, a cylinder 2, a pneumatic valve 3, an energy storage tank 4, and an inflatable solenoid valve 5; the loading piston 1 is located in the cylinder 2, cooperates with the cylinder 2 without clearance, and can slide axially along the cylinder; the loading piston The loading end of 1 and the loading object 6 can be connected according to the test requirements. When the test requires a collision impact with speed, a certain distance is reserved between the two, otherwise the two are fixed; the cylinder 2 and the energy storage tank 4 pass through Pneumatic valve 3 is connected, and can control the flow rate and flow rate of the compressed gas in 4 to the outer cylinder 2 according to the waveform requirements, and generate a predetermined waveform; the energy storage gas t...

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Abstract

The invention discloses a loading device capable of sequentially applying impact loads and steady-state loads, which is characterized in that it includes a loading piston 1, a cylinder 2, a pneumatic valve 3, an energy storage tank 4, and an inflatable solenoid valve 5; the loading piston 1 is installed In the cylinder 2, the loading end of the loading piston 1 and the loading object 6 can be connected according to the test requirements; Flow rate and flow rate; the energy storage tank 4 is connected to the external air source through the inflation solenoid valve 5, wherein the volume V2 of the energy storage tank 4 is greater than the effective volume V1 of the cylinder 2. The inventive technique simulates impact with velocity. Under certain working conditions, it is necessary to simulate the collision impact with speed, and leave a certain acceleration distance between the piston and the structure under test, and use high-pressure gas to push the piston to move, so that the collision impact with speed can be realized.

Description

technical field [0001] The invention belongs to the field of research and development of a special test loading device, which is used for the simulation of a special load loading form, and the quasi-stable load can be applied immediately after the impact load in time sequence. Background technique [0002] For some structures or system structures that unfold under impact loads and then bear static loads to realize their functions, such as adjustable nozzles of solid rocket motors and their installation structures, etc., the load forms are as follows: figure 1 As shown, the load can be divided into transient impact process and quasi-steady-state process. The transient impact process is generally on the order of milliseconds, and the duration of the quasi-steady-state process is usually several seconds. Before the bench ignition test or flight test, it is necessary to analyze or test the bearing capacity of the structure to ensure the safety of the structure during the test. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/307G01N3/12
Inventor 刘小川
Owner CHINA AIRPLANT STRENGTH RES INST
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