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Rapid decompression test device

A test device and rapid decompression technology, applied in the direction of measuring device, machine/structural component test, instrument, etc., can solve the problem that the vacuum pump is difficult to realize, and achieve the effect of simple method

Active Publication Date: 2014-12-10
CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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  • Application Information

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Problems solved by technology

[0003] To realize the above test, a vacuum pump with extremely high pumping speed is required. For example, if a Ф600×600mm vacuum chamber needs to realize the above conditions, the required pumping speed of the vacuum pump is about 2300L / S, which is difficult to achieve with existing vacuum pumps.
Therefore, the above test can only be realized by the method of gas balance, and there is no corresponding test chamber on the market to meet the requirements

Method used

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Embodiment Construction

[0014] (1) First, the volume V of the container used for the test should be determined according to the size of the test product A , that is, the container must have enough space to place the product.

[0015] (2) After determining the volume of the container and the thermal vacuum box, according to the gas pressure before and after the test, use the formula PV=nRT to determine the initial pressure of the thermal vacuum box. Assume that the pressure of the thermal vacuum box in the initial state is P B , with volume V B , the temperature is T B , the container pressure is P A , with volume V A ,T A , the pressure of the gas after equilibrium is P, and the temperature in the container is T A ', the temperature outside the container is T B ', where P A , V B , P known, V A ,T A ,T B ,T B 'Can be set by yourself, you can use the formula Calculate T B ', and then through the formula P B ...

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Abstract

The invention relates to a rapid decompression test device comprising a thermal vacuum box (1), a container (2), a gas circuit connection system (3), negative pressure gauges (4), a ball valve (5), a vacuum pump (6), a negative pressure sensor (7), a connection hose (8) and a pin puller (9). The rapid decompression test device is characterized in that interior pressure of a test box is decreased to a specified pressure by pumping through the thermal vacuum box (1), the interior pressure of the container is decreased to the specified pressure by pumping through the vacuum pump (6), a piston on the container is unlocked with the pin puller (9) which runs quickly and highly synchronously, and the piston is opened by the interior and exterior pressure difference so as to allow rapid decompression.

Description

technical field [0001] The invention relates to a rapid decompression test device, which belongs to the application category of environmental tests. Background technique [0002] The rapid decompression test belongs to the test content in GJB150.2A-2009 "Military Equipment Laboratory Environmental Test Method Part 2: Low Pressure (Altitude) Test", and assesses the adaptability of equipment to rapid changes in the environment. GJB150.2A proposes a test requirements, the test method is not specified. [0003] To realize the above test, a vacuum pump with extremely high pumping speed is required. For example, to realize the above conditions for a Ф600×600mm vacuum chamber, the required pumping speed of the vacuum pump is about 2300L / S, which is difficult to achieve with existing vacuum pumps. Therefore, the above test can only be realized by the method of gas balance, and there is no corresponding test chamber on the market to meet the requirements. Contents of the invention...

Claims

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Application Information

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IPC IPC(8): G01M99/00
Inventor 熊国明蒋春
Owner CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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