滑阀式真空泵排气系统抗性消声结构的研究

Preliminary Study of Reactive Muffling of Exhaust System of Rotary Plunger Vacuum Pump

滑阀式真空泵排气系统的气流通道截面具有多次突变的特点,利用这个特点可以进行抗性消声设计。理论和试验都表明,合理地设计滑阀式真空泵排气系统扩张比、扩张室长度以及适当地利用插入管,可以有效的降低滑阀式真空泵的低频噪声。经过对H150型滑阀式真空泵的初步试验,取得了降低噪声9dBA的效果。

Some parts of the rotary plunger vacuum pump,including the expansion ratio, expansion chamber and insert tubes,has been redesigned to reduce low frequency noises. Our preliminary results show that the noiae can be reduced by 9 dBA in the case of H150 rotary plunger vacuum pump.