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How to solve the noise problem of roots blower and the solution to increase the noise of roots blower

Source: Roots blower manufacturer Release time: 2023-02-18 Hits:

  Roots Blower Mainly used in sewage treatment, aquaculture, pneumatic conveying, cement, chemical, casting, flour and other industries. The noise of roots blower includes mechanical noise and aerodynamic noise. The air volume inhaled and discharged by roots blower each time is large, and there is a sudden change. The greater the air volume, the higher the pressure, and the faster the speed, the greater the noise. During the operation of a single roots blower, the noise value is as high as 85-110dB. When multiple roots blowers work at the same time, the noise value superposition will become larger. This experience mainly introduces the practical operation experience in reducing the noise of roots blower.

        Roots Blower ① Rotating noise:
The rotating noise is caused by the pressure pulsation of the surrounding gas caused by the blade on the wheel hitting the surrounding gas medium when the working wheel rotates. For a particle in a given space, when the blade passes through, the pressure of the gas hitting the particle will rapidly rise and fall once, and the rotating blade will continuously sweep past one by one, producing pressure pulsation, The air flow is very uneven, thus radiating noise to the surrounding area.
② Eddy noise
Eddy noise is also called turbulence noise. It is mainly due to the formation of boundary layer and vortex separation when the air flows through the blade interface, which causes the pressure fluctuation on the blade and radiates an unstable flow noise.
Because the frequency of vortex noise mainly depends on the relative speed of blade and air flow, and the relative speed is related to the circumferential speed of the working wheel, which changes continuously with the distance from each point of the working wheel to the axis of the rotating shaft.
The aerodynamic noise of Roots blower is the result of the mixing of rotating noise and vortex noise; The mechanical noise is mainly radiated to the surrounding through the fan casing; The electromagnetic noise of the motor is lower than the aerodynamic noise and mechanical noise.
The noise of Roots blower in use is solved:
1. Pressure rise caused by pipeline blockage, at this time, we need to clean or replace the pipeline.
2. If the belt cover is improperly installed and causes vibration, it is OK to check and reinstall the belt cover;
3. The motor bearing is worn and replaced with a new one;
4. Dust entering into Roots blower causes abrasion, and the blower shall be disassembled and repaired at this time;
5. If there is no lubricating oil, the noise will be high. Check the oil supply system;
6. If the lubrication is poor, the oil drip nozzle and oil filter should be cleaned frequently;
7. The pulley is loose and the jackscrew is fastened;
8. The V-belt slips, and adjust the belt tension.


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