2D电液比例方向阀弹性压扭联轴器研究  

Study on 2D Electro-hydraulic Proportional Directional Valve Elastic Pressure Torsion Coupling

作　　者：左强[1] 李胜[1] 阮健[1] 任燕[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州310014

出　　处：《农业机械学报》2014年第5期327-333,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50675204);浙江省大学生科技创新活动计划(新苗人才计划)资助项目(2012R403073);中国博士后科学基金资助项目(2013M541798)

摘　　要：针对传统直动式电液比例方向阀流量小,而导控式电液比例方向阀结构复杂的不足,提出了一种流量大、结构简单的位置反馈型2D电液比例方向阀。该阀由2D方向阀、弹性压扭联轴器和比例电磁铁共轴联结。其中弹性压扭联轴器实现比例电磁铁衔铁直线运动和阀芯旋转运动的转换,并同时放大比例电磁铁推力。在分析弹性压扭联轴器工作原理的基础上,建立了数学模型,推导了轴向力、扭矩、转角与挠度的解析方程。基于ANSYS Workbench 13平台对弹性压扭联轴器静力学特性进行了有限元仿真,仿真结果与解析方程计算结果及实验结果基本一致。研究结果表明:比例电磁铁输入55 N,通过弹性压扭联轴器转换,阀芯产生了1.2 N·m扭矩,且输入力与输出扭矩的线性度较好;弹性压扭联轴器应用于2D电液比例方向阀是可行的。Since conventional direct acting electro hydraulic proportional directional valve has the limitation of small flow, and two stage electro hydraulic proportional directional valve has the limitation of complex structure, a large flow and simple structure 2D electro hydraulic proportional directional valve with position feedback was proposed. The valve coaxially consists of 2D directional valve, elastic pressure torsion coupling and the proportional electromagnet. The elastic pressure torsion coupling changes the linear movement of proportional electromagnet armature into the rotation of the spool movement, at the same time, amplifying the thrust of proportional electromagnet. Based on the operational principle of the elastic pressure torsion coupling, the mathematical model was established and the analytic equations of axial force, torque, rotation angle and deflection were deduced. Then the finite element simulation of static characteristics was performed on the platform of ANSYS Workbench 13. The analytic solutions and the simulated results are in a close agreement with the experimental results. The results indicate that with 55N input of the proportional electromagnet, through the elastic pressure torsion coupling switching, the valve has 12N·m torque output, and the linearity of the force input and the torque output is good; the spool displacement and the input displacement of elastic pressure torsion coupling are very consistent. The application of elastic pressure torsion coupling to the 2D electro hydraulic proportional direction valve is feasible.

关 键 词：电液比例方向阀 弹性压扭联轴器 比例电磁铁 

分 类 号：TH137[机械工程—机械制造及自动化]