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Periodic change in the pressure in a device from values above atmospheric pressure to values below atmospheric pressure (e.g. on pumps between the suction and pressure phase).

Is produced on changing from the suction side to the pressure side on hydrostatic displacement machines . Due to the pressure drop or increase that occurs in a very short time. The process is all the

Characterises the area of hydraulics in which pressurised water ( HWBF ) is used as the medium. As the water does not have the necessary viscosity or lubrication properties, often special devices and

On continuously adjustable directional valves : The flow depends on the magnitude of the pressure drop assumed at the control edges as well as the magnitude of the opening cross-section and with it th

Measures for quickly moving the tool to its working position. These include, among others The plunger circuit for fast advance , Usage of high volume low-pressure pumps (Figure E 3 a) , Rapid traverse

High volume low-pressure pump (mostly gear pump) for obtaining a high rapid traverse speed. It is shut down as soon as the pressure set on its idle circulation valve is reached.

is arrange in the main piston and switched such that pressure is only applied to it when the rapid forward movement is at an end. For this purpose it must be ensured that the main piston can draw in u

1. Term from electrical engineering: An intrinsically safe device has a power level so low that it can be used in potentially explosive atmospheres. 2. Machine controls are intrinsically safe if, in t

Damped movements

Given by the natural frequency as