Hydraulic Pump Station is to drive the use of electric motors， fuel tanks， hydraulic relief valve， ， including the source device or the hydraulic control valve device， General principles of its role in motor driven pump to provide the pressure source， through the chip， such as hydraulic valve drive device (the fuel tank or motor) to the direction， pressure， flow regulation and control of action to achieve the various Hydraulic station on various occasions is widely used in hydraulic power transmission， it can be highly integrated and fully automatic control， the space can be made in accordance with the specific corresponding shape points on the hydraulic design of great practical significance In this paper， the subject "before the bridge hydraulic system design - on the 2nd valve station" based on the former bridge some of the hydraulic system components detailed design of First of all， set the modalities for the implementation of hydraulic components and the structure and function parameters， and then for the function of this hydraulic station， institutional characteristics， the initial stop to determine the hydraulic system schematic diagram， and then the hydraulic system of the various components of the standards in detail Select pieces， and finally the entire system will optimize the combination of various components and the
