摘要
'二次源'法是一种精确测定液压泵泵源阻抗和泵源流量脉动的标准方法,该方法对测试元件精度和测试条件要求高,数据处理过程异常复杂,因此工业应用难度大。'二次源'法设被测泵泵源阻抗和泵源流量脉动并联,引入二次源测试被测泵泵源阻抗,通过公式计算泵源流量脉动。主要研究高频、大流量复杂出口管道柱塞泵流量脉动测试方法原理和测试过程,通过测试两组不同动态工况下柱塞泵出口处泵源阻抗和泵源流量脉动,应用公式推导泵源阻抗和泵源流量脉动。详述应用'二次源法'测试复杂出口管道柱塞泵泵源流量脉动的测试原理,测试注意问题,给出合理的测试过程;引入加权线性衰减技术估算被测泵频率处泵源阻抗,准确、快速地获得全频率范围内泵源阻抗值;给出不同出口压力下泵源流量脉动,证实了'二次源'法可用于大范围工况(不同柱塞泵出口压力、转速和斜盘倾角)复杂出口管道柱塞泵流量脉动测试。
The secondary source method is a standard method for precisely testing the hydraulic pump impedance and flow ripple. The precision of test elements and conditions is limited strictly, so the method is difficult to be used in industry. It is assumed that the pump source impedance and the pump source flow rate connected in parallel, the secondary source is introduced for testing the tested pump impedance, and then the flow ripple is computed with reasonable formulation. The test principle and process of secondary source method is investigated, and the flow ripple of the piston pump with complicated pipe is obtained by two different pipe impedances and flow ripples under different dynamic operating conditions. The test principle of the secondary source method for piston pump with complicated pipe is given, and the problem on operating the test is provided at the same time. The weighted linear regression technique is introduced to evaluate the source impedance at corresponding tested pump frequency quickly and accurately. The flow ripple under different pump outlet pressure is given, and the test method is proven to be used to test the flow ripple of the piston pump with complicated pipe in large scale of operating conditions.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第22期162-167,176,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(51075360)
国家科技支撑计划(2011BAF09B03)
中央高校基本科研业务费专项资金资助项目
关键词
二次源法
泵源流量脉动
泵源阻抗
线性衰减技术
Secondary source method Source flow ripple Source impedance Weighted linear regression technique
作者简介
徐兵，男，1971年出生，教授，博士研究生导师。主要研究方向为机电控制工程、流体动力元件与系统。E-mail：bxu@zju．edu．cn
