What is the problem of excessive noise in the operation of Roots blower?

Excessive noise during the operation of Roots blower may be caused by the following reasons:

mechanical failure

Gear wear: The gear of Roots blower may wear after long-term operation. This will lead to the decrease of meshing accuracy between gears, causing vibration and noise. When the gear is seriously worn, it may even slip, further aggravating the noise.

Bearing damage: Bearing is the key component to support the rotor of Roots blower. If the bearing is damaged, the operation of the rotor will no longer be stable, resulting in greater vibration and noise. Bearing damage may be caused by natural wear caused by long-term use, or by poor lubrication, overload and other factors.

Collision between the impeller and the wallboard: the clearance between the impeller and the wallboard is too small or the installation position is inaccurate. When the blower is running, the impeller may collide with the wallboard, resulting in sharp noise. In addition, the impeller may be deformed after long-term operation, which will also lead to collision with the wallboard.

Aerodynamic problems

Poor air intake and exhaust: The air intake pipe or exhaust pipe is blocked, and the valve is not fully opened, which will lead to the unsmooth air flow in and out of the blower, resulting in vortex and pressure fluctuation in the pipeline, thus causing noise. In addition, too many elbows and too small pipe diameter will also increase airflow resistance and produce noise.

Sudden pressure change: When the outlet pressure of Roots blower changes suddenly, such as during the start-up or stop process, or the phenomenon of pressure hold-up occurs in the system, it will lead to sudden gas pressure change, produce shock waves, and then cause noise. This kind of noise is usually sharp and has a certain periodicity.

Installation and basic problems

Unstable installation: Roots blower will vibrate during operation if it is not installed firmly, which will cause noise. For example, loose anchor bolts and loose connection between the blower and the foundation may lead to displacement and vibration of the blower during operation, and the noise will also increase.

Uneven foundation or insufficient rigidity: uneven foundation of the blower will make the blower in an inclined state after installation, resulting in uneven stress on the rotor and vibration and noise during operation. However, insufficient foundation rigidity can not effectively support the weight of the blower and the vibration force during operation, which will amplify the vibration and enhance the noise.

Lubrication and cooling problems

Poor lubrication: All moving parts of Roots blower need good lubrication to reduce friction and wear. If the amount of lubricating oil is insufficient, the oil quality deteriorates or the lubricating system fails, the friction between components will increase and noise will be generated. At the same time, poor lubrication may also cause overheating of components, further affecting the normal operation of equipment.

Insufficient cooling: Roots blower will generate heat during operation. If there are problems in the cooling system, such as the blockage of cooling water pipes and the failure of cooling fans, the temperature of the blower will be too high, which will reduce the performance of the equipment and may also cause noise. High temperature will expand parts, affect the fit clearance between parts, and then produce vibration and noise.