Hydraulic pressure booster and method for the production of an axial compressive stress in a high-pressure cylinder

A method for the production of an axial compressive stress in a high-pressure cylinder of a hydraulic pressure booster that includes a low-pressure segment including a hydraulic cylinder and a hydraulic piston, which is controlled by a working fluid to be displaceable in both axial directions of the hydraulic cylinder, an opposing high-pressure segment located on each axial end of the low pressure segment, in which each opposing high-pressure segment includes a plunger piston movable in a high-pressure cylinder via the hydraulic piston, in which each high-pressure cylinder is positioned between the hydraulic cylinder and a valve body and is arranged in a clamping sleeve that is positioned between the hydraulic cylinder and the valve body, in which, for each opposing high-pressure segment, a clamping piston, and which has a first pressure surface for applying pressure to the high pressure cylinder and to a high pressure seal for the plunger piston and a second pressure surface on which pressure from the hydraulic piston is applied, is axially displaceable in the hydraulic cylinder so that the high-pressure cylinder is in compressive contact with the hydraulic cylinder and the valve body, the method comprising:

• opening at least one valve in the valve body, whereby a working fluid positions the hydraulic piston against the clamping piston in an axial direction;
• increasing a pressure of the working fluid to a value above a working pressure of the hydraulic pressure booster, whereby the clamping piston is pressed against a front face of the high-pressure cylinder and a front face of the high-pressure seal of the plunger piston, which results in an opposing compressive force on a bearing ring of the valve body via an opposite face of the high-pressure cylinder and in an axial compressive stress in the high-pressure cylinder;
• and
• while maintaining the axial compressive stress in the high-pressure cylinder, positionally fixing the clamping piston in the hydraulic cylinder to retain the axial compressive stress in the high-pressure cylinder between the hydraulic cylinder and valve body.