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Chengdu Roots Blower Factory: Noise Characteristics and Noise Reduction Measures of Roots Blower

Category： Company News

time：2022-09-09

　　Chengdu Roots Blower FactoryNoise Characteristics and Noise Reduction Measures of Roots Blower

The noise characteristics of Roots blower are generally related to the flow rate, speed ratio and negative pressure of the fan platform. Roots blowers are widely used in porcelain, decorative building materials, paper industry, electrical industry, crude oil, chemical plants, textiles, aquatic products, wastewater treatment, food and other fields of pneumatic conveying, used to transmit gas and various neutral gases. However, it is not possible to transport flammable, flammable, explosive, harmful and weak corrosive substances. The processed products have high precision, high cost performance, reliable operation, sturdiness and durability, compact structure, convenient maintenance and maintenance. Within the scope of accessories, the main body of fan behavior is standardized, and there is a complete mass production system, which can meet your needs at will. The fan operates within the variable pressure range of 80kPa without cooling circulating water.

成都罗茨鼓风机厂

　　Chengdu Roots Blower FactoryFrom the roots blower noise frequency band can see its noise characteristics

(a) The noise of a large number of roots blowers is a stable noise in a wider frequency band. Generally speaking, it should be dominated by low and high frequencies, especially in the middle frequency band.

(B) The high noise value of the general flow fan appears in the low and medium frequency range, and the sound intensity level of the fan with more flow is offset from the low frequency to the high frequency.

(c) From the fan noise frequency band, its low frequency high value appears in 63Hz, high frequency high value in 500Hz, 125Hz between 63 and 500Hz is a trough period.

(d) In the large frequency range, the noise figure is generally reduced gradually with the increase of the signal frequency at 1000Hz, and its attenuation is about 10 shellfish per octave.

(e) Most of the noise spectrum characteristics of the suction outlet are consistent with the noise spectrum characteristics of the fan itself. Generally, it is a low-frequency noise source, which certainly causes great harm to human hearing, but because the sound source is located outdoors and is also low frequency, it can be extended to far away places and the degree of influence is relatively large.

(f) The watering port for flowers is generally relatively small due to its relatively small pipe and mouth opening, and the high-speed airflow impacts the surrounding air, damaging the gas balance and causing very large oscillations, forming an outdoor high-frequency noise source.

　　Chengdu Roots Blower FactoryRoots blower noise reduction measures

Many experts and scholars from all over the world are engaged in the exploration of fan noise. A large number of scientific studies have verified that the way to reduce fan noise should start with aerodynamic noise. Fans are a major noise source in chemical plants, especially kiln exhaust fans and cement clinker grate cooler fans in new dry cement plants, with noise reaching 105dB(A). The noise treatment of Roots blower is the main aspect to reduce the noise pollution of cement enterprises. Analyze the noise of the mechanical system generated by the whole fan generator set, especially the acoustic radiation of the shell. If the fan assembly is good, the access to the ventilation duct is smooth, can reduce the noise, on the contrary, will become bigger noise. The outlet and inlet pipes of the fans are constructed with silencers, the weight gain of the fans, the motor basic and the selection of plastic damping pads and other vibration isolation measures, as well as sealing covers for sealing fans, etc. The fan house is made of sound-absorbing walls, such as porous structure aerated concrete, sound-absorbing materials attached inside, or double-wall sound-proof wall treatment.


Keywords： Chengdu Roots Blower Factory: Noise Characteristics and Noise Reduction Measures of Roots Blower

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