Hagen-Poiseuille's law
fluid resulting from its viscosity . The relationship between flow rate and pressure difference is a linear one. This law was discovered by Gotthelf Hagen in 1839 and shortly afterwards (independently) by
Internal feedback control
that within a device or a closed system contain, e.g. a continuously adjustable valve or a linear amplifier , mostly a closed circuit position control system that improves the accuracy and reproducibility
Average torque
range on an alternating basis during a revolution. The effective rate of torque will fluctuate in line with this, with an average emerging accordingly ( relative delivery fluctuation ). This fluctuation
Partial flow filtration
Arrangement of the Return line filter "in the secondary flow", i.e. the filter is placed parallel to a throttle so that only one part of the returning oil flow is filtered ( Figure T 7 ). This arrangement
Pressure filter
Filter that is built into the high-pressure line, i.e. after the pump. It is an advantage that only the pump delivery flow must pass through it and that the following components are protected (Figure D
5-chamber valve
Also it is possible to influence the switching time by throttling the flow rate in the connection line between the two spring chambers.
Rolling vane motor
enabling very slow turning movements. In contrast, the volumetric efficiency is only moderate due to the line sealing on all sides. The rolling vane motor is therefore primarily used in .
Throttle
Throttle is therefore the generic term for orifice and nozzle . Flow resistances with a largely linear dependence of the flow rate on the pressure difference ( capillary tube ) (Figure D 43) are often
Open circuit
possible to reverse the direction in terms of pump delivery. Excessive negative pressure in the suction line should be avoided. A reversal of direction for the output element (cylinder, motor) is achieved via
Mooring control
force when winding and unwinding the cable. In order to achieve this, the displacement is adjusted in line with the pilot pressure , while maintaining a constant torque level, although this may be modified