Hierarchical control circuit
Function unit for a contiguous sub-process that is superordinate to the related individual controls or drive controls, but that is subordinate to the master control (DIN 19 237) (Figure G 26) .
Energy saving in hydraulics
Possibilities for energy saving result from measures to reduce the energy demand and energy loss as well as to recover energy . Specifically these are the following measures (Table E 2) : Design impro
Pump-flow motor
The flow rate Q of a hydraulic motor s calculated from the volume per revolution Vg, the rotary speed of the motor n and the volumetric efficiency factor ηv of the motor. Calculate the pump-flow of a
Anti-rotation element for cylinders
As the tube casing and piston of a cylinder normally have a circular cross-section, the pistons can rotate in the face of tangential forces. Where this is not permitted and is not prevented by the app
Cross-section dependent pressure loss
Pressure losses produced by flow deflections and velocity changes. The pressure loss factor ξ is required for the calculation. The pressure losses increase with the square of the flow velocity.
Pressure ratings
DIN 24 312 and DIN 2401 contain a summary of the pressure ratings used in the area of fluid technology as well as the preferred pressure values in this area. The ratings should be used, as far as poss
Digital
Means working "with numbers". This signifies the representation of variables using an agreed set of characters that are assigned to the variable to be represented by a code . If the variable to be rep