全回转舵桨液压系统回转抖动控制方法探析  

Rotation jitter control method in azimuth thruster hydraulic system

作　　者：武哲 李宝仁[1] 杨钢[1] 高隆隆[1] WU Zhe;LI Baoren;YANG Gang;GAO Longlong(FESTO Pneumatic Center,School of Mechanical Science&Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学机械科学与工程学院FESTO气动中心,武汉430074

出　　处：《振动与冲击》2022年第1期180-186,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51705164)。

摘　　要：针对全回转舵桨液压系统出现的回转抖动现象,基于AMESim搭建了含平衡阀的回转液压系统仿真模型,详细分析了平衡阀的最大节流流量、阀芯行程-通流面积特性对其动态特性的影响。结果表明:平衡阀控制压力的周期性波动会导致阀芯位置、通流面积的波动,是含平衡阀系统发生回转抖动现象的根本原因;当CB系列平衡阀的最大节流流量略小于或者等于系统设计流量时,回转动作更容易获得较好的平稳性;当含平衡阀系统的设计流量小于平衡阀最大节流流量时,CB系列平衡阀的通流面积梯度越大则回转抖动越严重,反之回转动作越平稳,所以全节流型平衡阀更容易获得平稳性,但这是以损耗回转速度为代价的;MBE*改进型平衡阀阀芯的有效行程大,有效地降低了通流面积对阀芯行程的敏感度,不仅在系统流量较小时能够获得良好的稳定性,而且在设计流量较大时仍能保持较低的压力损失。Here,aiming at rotation jitter phenomenon of a azimuth thruster hydraulic system,a slewing hydraulic system simulation model with counterbalance valve was built based on the software AMESim to analyze effects of the maximum throttling flow of counterbalance valve and characteristics of spool stroke-flow area on counterbalance valve’s dynamic characteristics in detail.The results show that periodic fluctuation of control pressure of counterbalance valve can cause fluctuations of spool position and flow area,this is the fundamental reason for rotation jitter of the system with counterbalance valve;when the maximum throttling flow of CB series counterbalance valve is slightly less than or equal to the system design flow,slewing action is easier to obtain better stability;when design flow of the system with counterbalance valve is less than the maximum throttling flow of counterbalance valve,the larger the flow area gradient of CB series counterbalance valve,the more serious the rotation jitter,otherwise the more stationary the slewing action,so the full throttling counterbalance valve is easier to obtain stationarity,but this is at the cost of losing slewing speed;the MBE*improved type counterbalance valve’s spool has a large effective stroke,it effectively reduces the sensitivity of flow area to spool stroke,this valve can not only obtain good stability when system flow is smaller,but also maintain lower pressure loss when design flow is larger.

关 键 词：全回转舵桨 平衡阀 回转抖动 控制方法 

分 类 号：TH137[机械工程—机械制造及自动化]