工程设计学报2024，Vol.31Issue(6)：766-775,10.DOI:10.3785/j.issn.1006-754X.2024.14.04
流体脉宽调制双向变量机构流量特性研究
Research on flow characteristics of fluid pulse width modulation bidirectional variable mechanism
摘要
Abstract
The method of variable-speed driving variable pump is mostly adopted for the bidirectional flow changes of hydraulic system.However,the structure of variable mechanism is relatively complicated,and frequent bidirectional variable regulation will lead to low dynamic response speed.Therefore,a new mechanism for flow regulation of fixed displacement pump was proposed to realize bidirectional variable function.The duty cycle of fluid pulse width modulation was changed by the axial movement of the spool of bidirectional variable mechanism.The product of the rotating speed of the spool relative to the valve sleeve and the number of valve port on the spool determined the frequency of fluid pulse width modulation.The flow characteristics of the bidirectional variable mechanism were analyzed by simulation and test.The results showed that the bidirectional variable mechanism could achieve bidirectional flow control with duty cycle of 0 to 100%,ane there was only 1.8%deviation between the simulation and test results.The research results provide a new flow control method for hydraulic pump with fixed speed design to use under variable speed working condition.关键词
双向变量机构/双向变量流量调节/流体脉宽调制/流量特性Key words
bidirectional variable mechanism/bidirectional variable flow regulation/fluid pulse width modulation/flow characteristic分类
机械制造引用本文复制引用
徐修文,任燕,鲁立中,阮健..流体脉宽调制双向变量机构流量特性研究[J].工程设计学报,2024,31(6):766-775,10.基金项目
国家自然科学基金资助项目(52175060) （52175060）
