A convenient way to reduce the noise of rotary vacuum pump

How to reduce the noise of rotary vacuum pump? The following three vibration isolation methods are Shared by vacuum pump technicians:
1. Rubber vibration isolator:
Choice of rubber vibration isolator: materials are generally chloroprene rubber (C.R), natural rubber (N.R); Generally choose compression type rubber shock absorber, for the weight of light vacuum pump, can choose shear type rubber shock absorber; Compared with spring shock absorber, rubber shock absorber vibration isolation performance is relatively different.
Ii. Add sui base:
In order to meet the more strict vibration system standard, it is undoubtedly the best choice to use the spring isolator when installing the inert base. Specification of inert base: the weight of base is more than 1-2 times the weight of vacuum pump. The frame is made of locked slot iron, the height of which is not less than 1/12 of the length, but not less than 150MM, not more than 300MM; The dimension of length and width should be able to cover the whole rotary vane vacuum pump, and it is advisable to leave 10-15 cm on each side. And it is better to include bay head as well; It is filled with cement with a layer of steel mesh at one third of the height. Install spring isolator to distance the base from the foundation to 3-5 cm.
3. Spring vibration isolator:
1, vacuum pump spring vibration isolator selection:
General choice of free-standing spring shock absorber, its advantages of simple structure, low cost; The spring is exposed to the outside, which is convenient to observe the state of the spring at any time. The spring that needs to be replaced should be disposed in advance, so as to avoid the appearance of equipment damage and pipeline rupture caused by the sudden deposition of the rotary vane vacuum pump when the spring is corroded excessively.
2. Spring selection:
General shock absorber manufacturers to choose the spring to meet the following requirements: the spring diameter should not be less than 0.8 times the height under the rated load; The spring shall have a certain additional stroke, and the vortex flow meter shall be equal to at least 50% of the rated static deflection; The horizontal stiffness of the spring is at least 100% of the rigidity of the stiffened steel to ensure the stability of the shock absorber.
3, spring shock absorber deflection selection:
In general, the rated deflection (spring rated compression) of the shock absorber proposed by the vibration absorber manufacturer is generally 25MM(self-frequency value is about 3-4hz), which can be used for vibration isolation of the vacuum pump at 650 revolutions per minute. When the speed is below 650, it is recommended to use a spring isolator with a deflection below 40.

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