Abstract
Electro-hydraulic proportional valve is a proportional solenoid valve input voltage signal generated according to the corresponding movements to produce a shift in the work of the spool valve, valve port size is changed and thus the completion of the input voltage proportional to the pressure and flow output of the device.Spool displacement can also be mechanical, hydraulic or electrical feedback form.As the electro-hydraulic proportional valve is of the form diversity of species, easily composed using a variety of electrical and computer-controlled electro-hydraulic system, control of high precision, installation flexibility and the ability of anti-pollution and so many advantages, so applications become increasingly broadened.Its level of development can also be a reflection of a country's level of hydraulic industrial technology, thus increasing the importance attached by the countries in the industrial sector. This design issue is the electro-hydraulic proportional valve of a class - 3DRE proportional pressure reducing valve (3 powered hydraulic proportional valve).First, electro-hydraulic proportional valve for the large-scale analysis of a brief, including its characteristics and classification, and function of development stage.And then on the electro-hydraulic proportional valve design was further detailed study, in the structure, principle and detailed analysis Xingneng finished based on the power of Ji as the cartridge valve, electro-hydraulic pilot stage toproportional relief valve of the electrohydraulic proportional valve's structural design. The following is a brief section: The first chapter introduces the background and significance of topics, and content of the study. The second chapter describes the characteristics of electro-hydraulic proportional valve, classification most development, which is also proportional amplifier, proportional solenoid, proportional pressure valve is briefly introduced. The third chapter for the regulator works and performance analysis.Including performance analysis, including its performance indicators and mathematical model. Chapter IV-based design of the main contents, is a kind of electro-hydraulic proportional pressure reducing valve of the structural design.Includes a pilot valve, main valve, ring, spring, spring seat, cover and assembly drawing design.
Key words: electro-hydraulic proportional valve; 3DRE;Three port