Sand/dust blowing environmental test equipment system

Abstract

The sand and dust environment test system includes circulating wind channel simulating wind speed environment, sand and dust material circulator, air regulator and pipe passages. The sand and dust material circulator and the air regulator are connected through the pipe passages to the circulating wind channel, and each of the pipe passages is equipped with valves for controlling flow rate, flow speed and pressure. The test air flows inside the circulating wind channel with fairing, heat insulating and air-solid separating functions and forms the required two phase air solid flow in the experiment section. The air regulator is used in regulating the temperature and humidity conditions in the experiment. The test system may be used in sand and dust environment experiment for vehicle, airplane, panzer and other large electromechanical equipment.

Description

technical field [0001] The invention relates to a device system capable of carrying out two environmental tests of sand blowing and dust blowing in the same set of equipment. Background technique [0002] Sand blowing and dust blowing tests are important means to test the environmental adaptability and environmental reliability of vehicles, aircraft, electrical equipment, and military equipment in deserts, arid areas, and windy sand weather conditions. [0003] At present, sand blowing and dust blowing tests need to be carried out in different environmental test equipment: (1) During sand blowing, due to the large sand and dust particles (with a particle size between 150 μm and 850 μm), the wear on the fan blades is relatively large. And because the air duct is designed as an open air duct (or wind tunnel), the loss of sand and dust material and the energy loss for temperature regulation during the test are relatively large; (2) when blowing dust, although the dust particles...

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Problems solved by technology

And because the air duct is designed as an open air duct (or wind tunnel), the loss of sand and dust material and the energy loss for temperature regulation during the test are relatively large; (2) when blowing dust, although the dust particles are small (grain diameter≤150μm), because the air duct is designed as a closed circulation air duct, the sand and dust material loss and energy loss during the test are reduced, but because the sand blowing and dust blowing tests use different test equipment, the test equipment Utilization rate is not high

Existing sand blowing and dust blowing environmental test equipment adopts the method of adding sand and dust by relying on gravity and the enveloping effect of the main air flow of the air duct. The test environment for dust concentration, particle velocity and uniformity before the specimen

Sand blowing and dust blowing tests need to strictly control the temperature and humidity in the environmental test equipment. If the existing temperature adjustment method of directly connecting the heat exchange surface and the electric heater into the sand blowing / dust blowing air duct is simply adopted, There will be a phenomenon that the pressure head of the main fan and the energy loss of the system will increase; in addition, because the adjustment object is a gas-solid two-phase flow containing sand and dust particles, it is impossible to use conventional drying methods to adjust its humidity

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