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  • 冷却塔噪声源分析
  • 本站编辑:9728太阳集团发布日期:2022-05-10 16:11 浏览次数:

冷却塔是一种热交换设备, 噪声源主要有以下几个方面:

冷却塔风机噪声,主要分为散热风机的机械噪声和风机进排气空气动力性噪声,特性为低频。

安装在冷却塔上部的风机主要是逆向抽出的,以此来达到降温的目的。而风机的高速旋转会产生空气动力性噪声,旋转中的多个叶片作用于气流,然后引起气压和运动速度呈脉动变化产生的,其旋转部件的不平衡会导致结构发生振动,从而产生振动噪声。

冷却塔落水噪声,冷却塔的循环水从上部喷淋管流下,经过自由落体会产生冲击噪声,与落水速度的平方成正比,与撞击水面的四次方成反比。

冷却塔塔体噪声,冷却塔塔体机械的噪声,主要来源于机器部件的振动。机器的零件都会在工作中发生弹性变形,然后产生振动。具有弹性的机械部件将振动能量传播到辐射表面时,就会经过空气传播出去,形成机械噪声。

Cooling tower is a kind of heat exchange equipment, and the noise sources mainly include the following aspects:

The noise of cooling tower fan is mainly divided into mechanical noise of cooling fan and aerodynamic noise of fan inlet and exhaust, with low frequency characteristics.

The fan installed on the upper part of the cooling tower is mainly extracted reversely to achieve the purpose of cooling. The high-speed rotation of the fan will produce aerodynamic noise. Multiple blades in rotation act on the air flow, and then cause pulsating changes in air pressure and moving speed. The imbalance of its rotating parts will lead to vibration of the structure, resulting in vibration and noise.

Cooling tower water falling noise: the circulating water of the cooling tower flows down from the upper spray pipe and will produce impact noise through the free falling body, which is directly proportional to the square of the falling speed and inversely proportional to the fourth power of the impact water surface.

The noise of the cooling tower and the mechanical noise of the cooling tower mainly come from the vibration of machine parts. The parts of the machine will be elastically deformed during work and then vibrate. When elastic mechanical parts transmit vibration energy to the radiation surface, it will be transmitted through the air to form mechanical noise.

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