HIGH-PRESSURE GENERATION DEVICE

摘要

A high-pressure generation device (110) has three pressurizing chambers for pressuring liquid that is drawn from the outside by pumping actions of pistons (1) having different diameters. The device (110) pressurizes the liquid drawn from the outside and discharges the liquid, which is pressurized to a specific pressure, to the outside by each reciprocating motion of the pistons (1). The device (110) has a first pressure chamber (31) for drawing liquid from the outside, a second pressure chamber (32) whose pressurizing area for pressurizing the liquid is smaller than that of the first pressure chamber (31), and a third pressure chamber (33) whose pressurizing area is smaller than that of the second pressure chamber (32) and discharging the liquid to the outside. The pressurizing areas of both the second pressure chamber (32) and the third pressure chamber (33) are set such that the ratio of the difference between the pressurizing areas of the second and third pressure chamber (32, 33) to thrust produced when the pistons (1) move in one direction is equal to the ratio of the pressurizing area of the third pressure chamber (33) to thrust produced when the pistons (1) move in the other direction.