Abstract: Hydraulic drive and method for driving a pressure booster of a high-pressure apparatus. The hydraulic drive includes a pressure medium pump having one of a constant displacement pump and a pump conveying a constant volume per revolution, a servo motor coupled to drive the pump, and a controller structured to at least one of electrically control, regulate and switch the servo motor, which is arranged on at least one of a low pressure side and a high pressure side of the pressure booster.

Abstract: Cylinder unit of a high pressure pump for a fluid. Cylinder unit includes a cylinder formed by at least two concentric tubular components coupled by a shrink connection. A flange part with sealing system is detachably connected on one side of the cylinder, and sealing system has a movable plunger and a bearing bushing. A valve body is connected on other side of the cylinder. Bearing bushing and radially outermost component are arranged to bear against flange part to form an intermediate gap, a spring device has a distal portion supported on outermost component of the cylinder and a proximal portion on an outside of bearing bushing, and a valve body against which an other side of the cylinder bears are included. The tubular components have a metallic connection in a region of a surface bearing between the valve body and the cylinder.

Abstract: Hydraulic drive for pressure booster of a high-pressure apparatus, having an electric servo drive effectively connected to electrical supply operable to be regulated and/or switched by measurement signals; a hydraulic pump, pumping a constant volume of working fluid per revolution, and driven by the electric servo drive, and measuring devices for a pressure and/or a pressure trend of the working fluid and/or a pressure and/or a pressure trend of the high-pressure fluid and/or for a position of a piston in the pressure booster. Servo drive is embodied bidirectionally, such that an application of working fluid to the pressure booster is reversible. Control of regulating and/or switching parameters of the electrical supply of the servo drive is based on signals from the measuring devices for the pressure and/or the pressure trend of the working fluid and/or the high-pressure fluid and/or for the position of the piston in the pressure booster.

Abstract: Cylinder unit of a high pressure pump for a fluid. Cylinder unit includes a cylinder formed by at least two concentric tubular components coupled by a shrink connection. A flange part with sealing system is detachably connected on one side of the cylinder, and sealing system has a movable plunger and a bearing bushing. A valve body is connected on other side of the cylinder. Bearing bushing and radially outermost component are arranged to bear against flange part to form an intermediate gap, a spring device has a distal portion supported on outermost component of the cylinder and a proximal portion on an outside of bearing bushing, and a valve body against which an other side of the cylinder bears are included. The tubular components have a metallic connection in a region of a surface bearing between the valve body and the cylinder.

Abstract: Hydraulic drive and method for driving a pressure booster of a high-pressure apparatus. The hydraulic drive includes a pressure medium pump having one of a constant displacement pump and a pump conveying a constant volume per revolution, a servo motor coupled to drive the pump, and a controller structured to at least one of electrically control, regulate and switch the servo motor, which is arranged on at least one of a low pressure side and a high pressure side of the pressure booster.