Bernoulli force
exercised by the flow on the environment is the flow force This Bernoulli force can be seen, for example, with directional valves where, during opening, it exercises an opposing force on the valve control spool
Pressure loss
consequence of energy conversion (e.g. at a flow resistance ) (DIN 24 312). The pressure loss along with the leakage loss is the most important source of loss in hydraulic systems. It arises due to the of
Valve actuation
actuation using levers, plungers and/or rollers and springs. Electrical actuation using electromagnets with a single or double effect or electric motors. This also includes proportional solenoids and elect
Actuator
This is generally synonymous with a . In the event of movement control, the actuator converts the electrical signals of a controller into mechanical work. One example of this is the opening and closing
Transfer function φ of a system
If certain requirements are fulfilled in a system with given input variables u and output variables v and all input variables are uniquely allocated to the output variables, this unique allocation is known
Switching methods (electric)
an electronic amplifier circuit before it reaches the electromechanical converter. Example: Valve with integrated electronic controller (EDIN 24 311). The switching method influences the signal duration
Hydraulic bridge rectifier
combination of two half bridges results in a full (Wheatstone) bridge. This is the case, for example, with the control edges of continuously adjustable valves whereby deflecting the valve control spool creates
HFD fluids
HFD R and HFD S. Other compositions (HFD U). Common to All HFD fluids is the lack of compatibility with most materials for seals and a high density of 1.15 to 1.4 g/cm3 (intake characteristic!), which
Fabric materials
Fabric group for seals that comprise textile fabrics that have been impregnated with elastomer components. The seals manufactured from this material are suitable for very high pressures due to their high
Variable delivery flow (control)
Feature on hydraulic pumps of piston and vane design that changes the delivery flow in accordance with an input variable. On the pump this is a distance s that can be specified in various ways (Figure