A hydraulic pressure intensifier using oil hammer. 3rd Report-pressure control on a new principle.

The author devised an intensifier using an oil hammer, and operated an oil cylinder at a pressure about six times that generated by a pump. Operation of the intensifier as a pressur e control device and its performance are discussed in this paper. The pressure is controlled by switching on and off one solenoid controlled valve. The discrete value is controlled by the number of pulses for switching. The continuous value is controlled by the pulse width. Any value can be generated combining these two ways. Theoretical results were found to be in close agreement with those determined experimentally. The new device has the following advantages. (1) Pressure is higher than the supply. (2) Pressure can be easily controlled. (3) Operation of the device has great repeatability. ( 4 ) The supply flow is zero when you keep the output pressure constant.