Methods to reduce the noise of water pump

Methods to reduce the noise of water pump

Pump noise is the main gas and liquid in the process of conveying the aerodynamic noise, the structure of the vibration excitation motor noise, and the noise of the motor.Such noise levels are mainly concentrated in low-frequency bands around 100-450hz.The sound source is a steady state noise in the normal operation of the pump house.Pipe noise refers to the noise produced by the flow of water in the pipe.In addition, the cavitation phenomenon of the pump and the stop cause pump water hammer can also produce instantaneous noise.The noise produced by the water supply pipe is affected by the velocity and pressure.

The noise of the pump house of a complete set of facilities to produce mainly for the mechanical noise, at present the management method of noise on acoustic principle is commonly used is to control noise transmission way, sound insulation, sound absorption, noise elimination, etc.Sound isolation is used to separate the sound source from the sound.Sound absorption is used to reduce the noise by absorbing sound structure or absorbing material.Noise reduction is the principle of impedance, resistance and porous diffusion.

Noise control measures should be based on acoustic principle and make full use of the environment and conditions.Such as:

1. According to the environment of the pump room, the sound source is closed and the pump room is closed and the sound insulation is processed. The noisy room in the pump room is used for sound absorption/sound insulation processing.

2. Control the noise generated by the equipment and parts of the equipment.The new pump room pump foundation should adopt heavy weight to prevent the vibration from generating noise.In addition, the vibration isolation of rubber insulation cushion should be established to reduce the noise of vibration.Each pump unit sets the foundation separately to prevent the resonance.Use the "soft" connection as much as possible in the pump suction and pressure pipe.Regular maintenance, problems such as leakage, loose equipment parts, wear and tear of equipment parts, mechanical vibration should be repaired in time to reduce noise.

Due to different manufacturers and types of water pump, the working principle and structure will have difference, so, conduct site survey and analysis of noise of pump room sound insulation noise reduction scheme design and material selection is very important.