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Guangdong cooling tower noise solutions and causes

Author：Trlon Views: Time:2020-12-28

　　Guangdong's cooling tower noise solutions and causes The noise sources of cooling towers are more complicated and are caused by multiple reasons, including the operating noise of the cooling tower power unit (fan blade vibration sound, fan cyclone sound), Water dripping sound, electromagnetic noise and artificial noise of water treatment equipment.

　　1) The basic method of cooling tower noise;

　　1. The dripping noise of the cooling tower.

　　2. The vortex of the air circulation of the cooling tower fan.

　　3. Vibration and noise of transmission system accessories.

　　2) Causes of dripping noise from cooling towers and solutions:

Cooling tower noise control

　　There are basically three ways to reduce noise in cooling towers:

　　1. Solve or reduce the noise value of noise;

　　2. Block the transmission of noise;

　　3. Protect the victims;

　　When the cooling tower is in operation, the water passes through the water distribution tray, flows through the water spray nozzle, and evenly splashes the water in the filling material. After the filling material is sprayed to complete the heat exchange, it is immediately injected into the water storage tray. The noise is basically caused by the splashing of water droplets, because the fourth-generation new suspension-type filling material adopted by our manufacturer is directly inserted into the water, which reasonably and effectively solves the deformation of the filling material and the sound of splashing after the water drops. The currently adopted heat-removing and water-sprinkling filling material adopts advanced layout design to make the water evenly distributed, and the water adhesion function is very strong, and the dripping ripples often used in domestic design schemes are discarded, so that the dripping noise can be greatly reduced (about can reduce Noise 4dB(A)).

　　The shorter the chord length of the blade profile, the lower the speed of the fan blade tip, and the lower the vortex noise. The low static pressure filling materials, atmospheric chambers, multiple blades, low speeds and other methods are now used to solve the uneven shock wave and vortex noise that need to be formed when the fan is running.

　　The reducer is changed to ultra-low noise special (imported ultra-low noise bearings), according to the Japanese Mitsubishi brand triangle belt low-speed transmission system, with two layers of protective oil, two layers of waterproof system protection, good weather resistance, easy maintenance (only Just add butter), the driving wheel is changed to a low-revolution type, and at the same time, a part of the transmission system is placed in the air chamber to minimize the tower noise hazard.

　　The air duct only acts as a wind guide and will not be subjected to the load of the motor reducer, without vibration fatigue damage, and will not damage part of the working environment of the transmission system due to aging or deformation after damage, causing insufficient supporting rigidity of a part of the transmission system, reducing the service life. The upper equipment of the air duct has a diversion shielding cylinder designed according to the principles of aerodynamics and acoustics. The scientific and reasonable diversion direction can recover the function, reduce noise, and reduce the flow of hot steam. The structure is divided into four pieces and assembled. Convenient and accurate. For details, please refer to the detailed introduction of the characteristics of the attached hair dryer.

　　The motor frame is positioned once on the metal frame of the main beam column, with few single pieces, good rigidity, low vibration and low noise source

　　The motor is a dedicated motor for a fully enclosed cooling tower. There is a fully enclosed waterproof leather pad between the wiring room and the body, and a waterproof rubber ring specially designed for the operating environment of the cooling tower at the shaft extension end, which reasonably and effectively solves the problem of water extension along the shaft. Into the problem inside the motor, the motor shaft is chrome-plated protection, the protection level is IP55, and the insulation resistance is B level. The motor has good waterproof function and can meet the special requirements of the cooling tower operating conditions for the motor. The motor adopts vertical sinking installation with low noise.

　　For the analysis and calculation of noise, most cooling tower manufacturers still find the source of noise based on the test as the standard, and the above methods can be effectively solved.

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