Design Of Electrohydraulic Control Platform With Four Degrees Of Freedom

With the development of mechanization and automation technology, the technology of hanging is running from manpower and semi-mechanization to mechanization and automation. Especially, the speedy developing hydraulic technology with advantage of high energy density and steady transmission drives the process rapidly.A kind of electrohydraulic control platform with four degrees of freedom which could be built in moving vehicle is researched in this paper. The platform has compact structure and is controlled by electrohydraulic. The platform built in moving vehicle can achieve mechanization of hanging. The thesis is outlined as following:In chapter 1, the using situations of electrohydraulic control platform with four degrees of freedom are briefly introduced. The platform for hanging with multi-degree of freedom home and abroad are summarized. The design content and purpose of the research are proposed.In chapter 2, the overall design scheme and the composition of the electrohydraulic control platform with four degrees of freedom are introduced. The arrangement is designed in SolidWorks.In chapter 3, the hydraulic system of the electrohydraulic control platform with four degrees of freedom is designed and the working process of hydraulic circuit is discussed. Also, the actuators of the hydraulic system are designed in detail. Especially, key connection and expanding sleeve connection of hydraulic swing motor are analyzed and compared. Hydraulic components are selected due to structural design and parameter calculation. The hydraulic system is simulated in AMESim which coached the debug of prototype. In chapter 4, the mechanical system of the electrohydraulic control platform with four degrees of freedom is designed and design process is introduced. The selection of material is discussed and the slide way is selected due to parameter, safety factor and life-span calculation. Especially, a new kind of slewing ring bearing is designed which has squared outward appearance and the rub resistance moment of the slewing ring bearing is researched. Key components of mechanical system are analyzed in ANSYS and the maximal deformation and safety factor is introduced. Also the control system of the electrohydraulic control platform with four degrees of freedom is designed and control means of amplifier, components of control system and control circuit are designed.In chapter 5, prototype experiments of the electrohydraulic control platform with four degrees of freedom are carried on and test data is analyzed and researched.In chapter 6, the content of the paper is summarized and future work is put forward.