Development of H-type Zero Opening Hydraulic Pulse Control Servo Valve for the Vibration DiggingImplementation of Hydraulic Excavator

A H-type zero opening hydraulic pulse control servo valve with independent intellectual property in the core technology was developed.To realize vibration mining way of the energy-efficiency hydraulic controlled vibration excavator with the structure design and hydraulic oil control system,the traditional static digging force was changed into dynamic digging force.The purpose is to solve low efficiency and large energy consumption of excavator in the complex ground construction works,such as hard ground surface,mining gravel ground,rock earthquake ground and etc.At the same time,some problem are overcome,such as traditional servo valve processing difficulties,high cost and poor pollution-resistant ability,and complex in oil filter circuit design and difficulty in filter manufacturing.