Abstract
The topic of this graduation project is precisely one kind of electro-hydraulic proportional valve----two stage electro-hydraulic proportional throttle valve. This design will first carry on detailed analysis to the structure, principle and function parameter of various part of this kind of valve, then complete the structural design and the parameter design of the two stage electro-hydraulic proportional throttle valve ,this valve's main stage is cartridge valve ,its forerunner stage is three contacts reduced pressure overflow valve .This valve's rectum is 32mm,and its max regulated flow is 480L/min,the oil input port fixed working pressure is 31.5MPa, the output port fixed working pressure is 30.5MPa.
As the design of electro-hydraulic proportional throttle valve design parameters to meet the requirements for : electro-hydraulic proportional throttle Path 32 mm, the largest volume of 480 L / min, the valve is large flow of high pressure valves, Today, the large flow range of high pressure areas, cartridge valves with flow capacity, seal performance and flexible assembly, has replaced the sliding valve structure has become the dominant area of control valve varieties. Therefore, in the design of the main throttle valve used cartridge-style structure, instead of the traditional slide-valve structure.
Electro-hydraulic proportional control technology is a late start, but development is rapid, Application has been quite extensive Hydromechatronics Integrated Technology. Today, the electro-hydraulic proportional control technology with a series of advantages in industrial application has been quite common, and In the new system design and transformation of the old equipment is becoming an important user options, to enhance the technical expertise and equipment level, and the degree of automation equipment, playing an extremely important role.
