Abstract
A new type of hydraulic pressure intensifier was previously proposed by the author, which operates on the principle that an oil hammer is generated continuously in the pipeline by the on-off operation of a solenoid operated valve located at the downstream end of the pipeline and only the high pressure fluid is discharged through a check valve. In addition, a method to utilize the intensifier for pressure control of a hydraulic cylinder by adjusting a pulse to the solenoid operated valve was already proposed.
In this paper, a pressure control system utilizing this intensifier is developed to generate a wave form according to a desired input. The empirical formula which relates the pulse width to the corresponding pressure increase is established in advance and memorized in a computer. When the desired pressure is given to the computer, it calculates the pulse width automatically through the empirical formula and sends a pulse to a solenoid operated valve. This system generates a pressure higher than the supply pressure. As the inertia of the fluid is utilized for pressure control instead of usual pressure losses, it has a possibility of pressure control with higher efficiency than the usual method.
