As an important production process equipment in the industrial production process, the noise generated during the operation of the blower will seriously affect the surrounding environment. This paper will list in detail the causes of noise generated by blowers and effective noise reduction techniques, including optimising the structure of the blower, installing sound insulation materials and using noise reduction techniques, in order to reduce the impact on the surrounding environment.

The main reasons for noise generated by blowers are as follows:

1. noise generated by the rotating system: the imbalance of the rotating system of the blower, the friction and impact of mechanical parts, etc. will generate noise.

2. Noise caused by gas flow: when the blower is running, the gas flow will produce noise.

3. Installation and foundation problems: Installation and foundation problems of the blower can also lead to noise.

4. Poor design of the air duct system: Poor design of the air duct system can also lead to noise.

For the above reasons, we can adopt the following effective noise reduction techniques:

1. optimising the blower structure: by optimising the impeller design and improving the manufacturing and installation precision, the noise and vibration level of the blower can be significantly reduced.

2. Installation of sound insulation materials: installing sound insulation materials, such as muffling chamber, muffler, sound insulation door, etc., in the air inlet and outlet of the blower can effectively reduce the spread of noise.

3. Using noise reduction technology: such as using gradual expansion gap structure, acoustic isolation, reducing gear transmission noise, reducing mechanical vibration, controlling air inlet and outlet noise, controlling electromagnetic noise and optimising operation control strategy, etc., the noise generated by the blower can be effectively reduced to improve its use and comfort.

In summary, the reasons for noise generated by the blower are mainly the rotating system, gas flow, installation and foundation problems and the unreasonable design of the duct system. By optimising the structure of the blower, installing sound insulation materials and using noise reduction techniques, the noise generated by the blower can be effectively reduced and the impact on the surrounding environment can be reduced.