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cog tips, depending on the pressure ( Figure R 1 ). The radial gap compensation makes a significant contribution to allowing such internal gear pumps to work at pressures of 300 to 350 bar.

speed n) into hydraulic energy (flow rate Q, pressure p). Displacement pumps are used in hydrostatic applications for this purpose. A flow rate emerges at the pressure connection of the pump and drives the

from the valve to the consumer if approximately 1/3 of the available system pressure p max reaches the pressure difference on the valve and approximately 2/3 is available as load pressure on the consumer [...] into a path, which is taken over by the hydraulic control unit. A distinction is made between 1-stage and 2-stage or 3-stage servo valves. In one-stage servo valves, the electrical input stage (torque motor [...] servo valve today at a damping of 0.6. However, that can only be achieved with extremely short control distances of a few tenths of millimetres. Therefore, a high pressure difference at the control edges

whereas the output variable of the pump or motor is still subject to interference, e.g. leakage losses - and is therefore controlled. In practice, this method of observation does not correspond to the standard

exploit its torque. This means that almost all torque is available, even at a low motor speed (= lowest accelerator pedal setting f 1) (Figure H 28) . This also applies to the braking torque. Using a limit

Friction of seals to be overcome at the start of a movement (Figure H 1) . It is dependent on both the form of the seal (preload) and the seal material and on the service life of the seal: during longer [...] inactivity, the oil film under the seal is squeezed away allowing dry friction to predominate (Figure H 2) . Stiction of seals is particularly evident during stick-slip movements and during oscillating movements

filter with a specific pressure drop (Figure B 13) : Therefore at β x = 1 no particles are removed; 50 % of the particles are removed at β x = 2. The minimum practical value aimed for today β x = 75 then means

1. Providing the air is dissolved in the oil, it will not affect its characteristics. 2. Undissolved air, i.e. bubbles, cause the following: signs of corrosion on pumps and controls, increased compressibility [...] dissolves in oil in proportion to the pressure (up to around 300 bar). This means that dissolved air at low pressure is released until the saturation limit is reached (e.g. after the throttles). Since the [...] increases again, with the consequences outlined above. During assembly work, air infiltrates the circuit at places in the negative pressure (suction) area which are not properly tight and when oil is flowing

dividers). A flow rate Q A and a pressure p A will apply between two hydraulic resistances connected in series, based on the two resistance values and the load at the output. These circuit arrangements are

contamination and air, quietening). Is used at the same time to remove dissipated heat , however it is only suitable for this task to a limited degree (Table B 1) . As the tank is manufactured of thin material