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How does the dust testing machine work?

Author: Weisi instrument time: July 7, 2020 source: unknown
Abstract: the sand and dust testing machine is mainly used to simulate the natural and harsh sand and dust environment, and test the temperature change, dry and wet change, wind speed change, dust deposition and air pressure change of test samples. It is mainly used for the dust and dust resistance test of automobile parts

The sand and dust testing machine is mainly used to simulate the harsh natural sand and dust environment, and test the temperature change, dry and wet change, wind speed change, dust deposition and air pressure change of test samples. It is mainly used for dust and dust resistance test of automobile parts, including lamps, instruments, electrical dust covers, steering system, door locks, etc.

The working principle of the sand and dust testing machine is to realize a kind of dust environment by blowing up the sand dust with a certain wind speed in a closed box. Generally, it is equipped with auxiliary devices such as dust flood drying device and oscillator. Temperature control and humidity control work together with sand dust. The temperature of test chamber is controlled by temperature control adjusting device and heating device. Lower humidity is obtained by dehumidification device or by increasing temperature of test chamber. Rated wind speed is obtained by adjusting fan speed, and air pressure in chamber is reduced by vacuum pump.

According to the volume of the test chamber, the corresponding dust mass is placed, and the rated dust concentration is obtained by blowing and adding oscillation. Generally, there is no control and measurement device for temperature and dust concentration.

The sand and dust testing machine adopts free falling dust type and air pressure dust spraying method to simulate wind sand. The free falling dust type adopts centrifuge to blow the dust to the top of the box to let it settle freely. The pneumatic dust spraying mode has three adjustable pressure. The box body is treated with 304 stainless steel plastic spraying, and the inside of the box is made of 304 stainless steel, with smooth inner wall, dust and rust prevention.

When using the sand dust testing machine, we should pay attention to the following operation problems.

1. Dust test machine start-up instrument does not light, no power: check whether the power supply is normal, whether the phase sequence is normal, whether there is a zero line. 2. Do not blow dust: check whether the blower works normally or the fan is too small, and check whether the dust is dry. 3. No vibration: check whether the vibration motor is normal. 4. Special personnel shall be assigned to manage the operation, and the box and blower shall be cleaned regularly, and professional personnel shall be responsible for regular maintenance.

5. In order to give full play to the function and performance of the test chamber, the space with annual temperature between 15 ℃ and 25 ℃ and relative humidity less than 85% should be selected. 6. The distance between adjacent walls or objects. The environmental temperature of the installation site should not change rapidly. 5. It should be installed in a place without direct sunlight, in a well ventilated place, away from combustible materials, explosives and high-temperature heat sources. The equipment should be installed in a place with less dust and as close to the power supply as possible. 7. Power failure of equipment: check whether the power supply is normal, whether the phase sequence is normal and whether there is zero line.

This paper is written by Dust testing machine Weisi instruments are collected from the Internet for learning only. The copyright belongs to the original author.

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