低振动噪声船用离心泵的水力设计  

Hydraulic redesign on a marine centrifugal pump for hydro-borne vibration and noise reduction

作　　者：黄国富[1] 常煜[1] 张海民[1] 赵文峰[1] 陈奕宏[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2009年第2期313-318,共6页Journal of Ship Mechanics

摘　　要：随着现代船舶对运行环境舒适性要求的提高,船用泵设备的振动噪声控制已显得越来越重要。泵内水流脉动是船用离心泵的最主要振动噪声源,故降低泵内流动脉动是低噪声泵设计的关键之一。该文基于CFD性能预报的叶片泵现代设计方法,对某型船用立式离心泵进行了低振动、低噪声的改型设计。改型设计方案采取了一系列有利于降低泵内流动脉动措施,包括应用双流道蜗壳、增加泵叶梢与蜗舌的间隙、适当增加叶片数、叶片侧斜等。改型设计方案的CFD性能预报结果表明,泵内流动的不稳定性得到了明显改善。进一步的实泵试验台架对比试验结果表明,改型泵的水力性能优于原泵,而一阶叶频流噪声较原泵有大幅降低,获得了6dB以上的改善。The control of vibration and noise for marine pumps becomes more and more important with increasing demands on comfortable operating environment for modern marine ships. It is well known that the principal vibration and noise sources in a well-balanced marine centrifugal pump are of hydrodynamic nature.Thus, it is one of key points to reduce the internal flow fluctuations for the design of low vibration and noise pump. Based on the design method coupled with flow simulation by CFD, a marine centrifugal pump is redesigned for hydro-borne vibration and noise reduction.With such measures as doubling the volute, enlarging radial gap between the volute tongue and the impeller tip,increasing blade number of the impeller and adopting skew blades,the flow pattern in the new redesigned centrifugal pump is predicted by CFD to be improved obviously without hydraulic performance decaying.Moreover, the comparative tests under laboratory conditions between two pumps show that the new pump＇s fluid-borne noise of the 1st order of blade-passing frequency is reduced by more than 6dB under design discharge.

关 键 词：船用离心泵 振动 噪声 计算流体力学 设计 

分 类 号：U664.5[交通运输工程—船舶及航道工程]