Abstract: Hydraulic pressure booster and method includes a low-pressure segment including a hydraulic cylinder and a hydraulic piston, which is displaceable in both axial directions of the hydraulic cylinder and opposing high-pressure segments located on each axial end of the low pressure segment. Each high-pressure segment includes a plunger piston movable in a high-pressure cylinder via the hydraulic piston. Each high-pressure cylinder is arranged in a clamping sleeve, both of which are positioned between the hydraulic cylinder and a valve body. For each high-pressure segment, a clamping piston, which includes a pressure surface applying pressure to the high pressure cylinder and a high pressure seal for the plunger piston and a 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.

Abstract: Hydraulic pressure booster and method includes a low-pressure segment including a hydraulic cylinder and a hydraulic piston, which is displaceable in both axial directions of the hydraulic cylinder and opposing high-pressure segments located on each axial end of the low pressure segment. Each high-pressure segment includes a plunger piston movable in a high-pressure cylinder via the hydraulic piston. Each high-pressure cylinder is arranged in a clamping sleeve, both of which are positioned between the hydraulic cylinder and a valve body. For each high-pressure segment, a clamping piston, which includes a pressure surface applying pressure to the high pressure cylinder and a high pressure seal for the plunger piston and a 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.

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.

Abstract: Control device and method for controlling the impingement of the workpiece by a water jet or an abrasive water jet in a cutting unit. Control device includes a feeder composed of at least two flow-through areas positionable between a high-pressure water supply and a jet nozzle of the cutting unit. At least one of the flow-through areas includes a high pressure area, and at least one of the flow-through areas includes a pressure-reducing area. At least one switchable valve is arranged in the high-pressure area, a pressure-reducing mechanism is arranged in the pressure reducing area, and an impingement line is coupled to the at least two flow-through areas and coupleable to the jet nozzle.

Abstract: Cooling device and method for cooling a working fluid of a high-pressure pump with a pressure booster. The cooling device includes a conveyor system comprising at least one pump, at least two heat exchangers arranged in series along the conveyor system, and at least two switches coupled to the at least two heat exchangers. At least one controller is structured and arranged to selectively activate and deactivate the at least two heat exchangers via the at least two switches at an adjustably preset temperature of the working fluid.

Abstract: The invention relates to a seal of parts moveable relative to one another of high-pressure devices for liquid media, comprising a high-pressure container, into the opening of which the moveable part and, coaxially around this part toward the high-pressure side, a sleeve project, and a support ring on the front exterior area of the projecting sleeve bears against the interior surface of the opening of the high-pressure container and against a ring.

Abstract: Control device and method for controlling the impingement of the workpiece by a water jet or an abrasive water jet in a cutting unit. Control device includes a feeder composed of at least two flow-through areas positionable between a high-pressure water supply and a jet nozzle of the cutting unit. At least one of the flow-through areas includes a high pressure area, and at least one of the flow-through areas includes a pressure-reducing area. At least one switchable valve is arranged in the high-pressure area, a pressure-reducing mechanism is arranged in the pressure reducing area, and an impingement line is coupled to the at least two flow-through areas and coupleable to the jet nozzle.

Abstract: A method and apparatus conveys solid particles from a supply device to a charging device for charging free-flowing cutting jets. Positive charging of the cutting jets even when located at a greater or remote distance from the supply device is ensured. To that end, the solid particles are transported in a closed circuit between the supply device and a charging or intermediate storage device and the momentarily required partial quantity of solid particles needed for charging the cutting jet is removed from the closed circuit.