Rotary vane vacuum pump noise and treatment

During the operation of rotary vane vacuum pump, unpleasant noise and noise not only hinder staff's thinking, but also affect people's health; the causes of noise are: spring breaking, impact sound of rotary vane in operation; improper assembly, friction sound of rotor running; the rotary vane is forced from the end to jump out from the retracted rotor position and the rotary vane vacuum pump chamber. Impacting sound; parts burr, foreign body falling into the cavity of rotary vane vacuum pump or noise caused by deformation of the cavity of rotary vane vacuum pump; lubrication in the cavity of rotary vane vacuum pump is poor and dry-grinding noise generated; harmful space is too large, noise generated by rotary vane vacuum pump itself; bearing in motor is short of oil, resulting in dry-grinding noise. All these will make the rotary vane vacuum pump produce sometimes intolerable sound. Corresponding measures should be taken to eliminate them.

For example, due to improper assembly, the plane of the end cover plate is not perpendicular to the axis of the cavity. After opening the end cover, we can see that the half-edge arc of the end cover plate is worn out. This shows that when the rotary blade passes through this part, it is squeezed very badly and can not contact with the rotary vane vacuum pump chamber normally. When the rotary blade is forced over this part, it jumps out violently and periodically collides with the rotary vane vacuum pump chamber. Shock sound. For this problem, the end face of the cavity can be corrected to be perpendicular to the axis of the cavity, the scratches on the end cover plate can be abraded, and then the matching clearance between the cavity, rotor and rotor of the rotary vane vacuum pump can be adjusted, and the expansion performance of the rotary vane spring can be adjusted to eliminate this fault.

The inherent noise generated in the manufacture of counter-rotating vane vacuum pump is not irreparable. Some teachers dig out some of the outlet holes, i.e. slightly enlarged holes, to reduce noise; some teachers offset the middle baffle of the rotary vane vacuum pump by several millimetres to reduce harmful space, thus reducing noise.

In short, as long as the fault is located correctly, it can eliminate the problem of excessive noise, but it must not be allowed Z because a rotary vane vacuum pump in the sudden occurrence of noise problems, may soon be converted into a serious fault.

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