大流量三叶罗茨风机的流量特性及噪声分析

Analysis of Flow Characters and Noise of Large Flow Three Leaves Roots Blowers

介绍大流量三叶罗茨风机的流量特性,内泄漏、外泄露、压力比对容积效率的影响.根据回流压力的变化规律,采取异型排气口、预进气结构等措施减小回流冲击.实例说明风机的气体动力性噪声、机械噪声,比较三叶与两叶罗茨风机的进气流量脉动,分析噪声产生原因及采取的降噪措施.

Flow characters of large flow quantity, all the influence volume efficiency of three leaves roots internal leakage, external leakage＂ and pressure ratio and blowers are discussed. The change of back-flow pressure, deformed exhaust hole, pre-inflow structure and so on can be adopted to reduce back-flow impact. By practice, research of air dynamic noise and mechanical noise is carried out. Differences of inflow flow pulsation between three leaves and two leaves roots blower are compared. Analysis of causes of generating noise and ways of reducing noise reducing noise are completed.