翻译 脉动缓冲器工作原理.doc

翻译_脉动缓冲器工作原理UNDERSTANDING HOW PULSATION ACCUMULATORS WORK
J. C. Wachel and S. M. Price
Engineering Dynamics Incorporated
San Antonio, Texas
脉动缓冲器工作原理
J. C. Wachel and S. M. Price
工程动力公司
San Antonio, Texas
ABSTRACT
Pulsation accumulators are used in reciprocating pump installations to reduce pump manifold pulsations and to attenuate pulsations transmitted into the piping. The pump and piping system form plex acoustical system which has many acoustical and mechanical frequencies and the potential for high vibration ponent failure problems .Many times the pulsation characteristics of the system are not calculated prior to an accumulator is selected based on pressure and flow rate some cases ,this is acceptable as can be attested by the numerous installations that are installed and have operated essfully without ,many installations do experience high vibrations ,piping ponent failures,cavitations in the suction manifold,and generally poor problems are often the result of the failure to consider the system’s acoustical characteristics when selecting an accumulator.
摘要
在往复泵中使用缓冲器旨在消减泵的主管线脉动并减缓脉动在管道内的传播。泵及其附属管道形成一个复杂的声学系统,该系统具有多阶声学及机械固有频率,且该系统潜存剧烈振动和管件失效等问题。多数情况下,管路内的脉动特性在系统安装完成之前是不能计算出的。缓冲器是依据管道内的压力和液流的评价准则来选取的。在某些情况下,通过安装很多装置使系统运行平稳,安装得以认可。然而,这些安装在管路中的装置确承受着剧烈的振动,管道和附件的失效及吸气主管内的气穴现象等使管路的可靠性较低。这些问题的产生是由于在选择缓冲器的时候没有考虑到系统的声学特性所造成的。
The effects of several different types of accumulators in a three pump parallel system were studied using a puter program which models the pulsation characteristics of pump pressor analyses were performed on bladder gas charges appendage and flow-through accumulators,the non-bladder,flow-through,gas-charges accumulators,and all-liquid Helmholtz results indicate that the off-the-shelf accumulators can be effective in some cases,but bine with the particular acoustical characteristics of the system to amplify pulsations in other cases,In addition,the interact