As the field of environmental test equipment continues to evolve, the need for testing changes. The noise problem of the vacuum drying oven that I just bought has always been a headache for users. So how to solve it? And see Xiaobian one by one for you to explain.
1. Noise emitted by a large amount of gas and oil when impacting parts such as oil baffles. If the part is not rigid enough or is not tightened, vibration and collision will increase the noise. Therefore, the oil baffle should not only have sufficient rigidity and tightness, but also, when it is required to be in contact with other parts, the method of clamping rubber can avoid the collision noise caused by vibration and improve the oil retaining effect.
2. Noise inside the film vacuum pump. When the micro vacuum pump inhales, severe pressure fluctuations occur in the air inlet and the valve cavity, and the pressure fluctuation of the gas radiates from the air inlet in the form of sound waves to form air inlet noise. When exhausting, the airflow rapidly flows through the exit to generate sound waves to form exhaust noise. The higher the speed, the greater the pressure, the greater the flow and the greater the noise. This kind of noise can't be completely eliminated. Improve the design of the pump body and choose the appropriate silencer to reduce noise.
3. The impact noise of the rotary vane vacuum pump exhaust valve on the valve seat and the support member. The amount of gas inhaled is large, the amount of circulating oil of the pump is large, the noise of the valve plate is larger, the area of ​​the valve is large, the noise of the valve piece is also large, and the material of the valve plate also has a certain influence. Rubber diaphragms are more noisy than steel sheets or laminates. To this end, to control the amount of oil, the valve should be closed in a timely manner, to be strict.
4. Cracks and bubbles appear in the vacuum drying box. This noise will increase as the echo and bubble bursts in the tank increase. Therefore, this noise will increase significantly when the gas is opened or when the atmosphere is passed. If the gas ballast capacity is adjustable, the gas ballast amount can be adjusted reasonably.
5. The rotary vane of the rotary vane vacuum pump generates noise to the cylinder wall, the residual capacity of the pump and the sound of the pressure oil in the exhaust dead space. It is advisable to use a circular arc surface to separate the structure into the exhaust port. Use the exhaust guide to eliminate dead space.
6. The motor is also an important source of noise.
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