Hakuteksti "P - R2 - 1 - 1/4 - AT".

things, the compressibility of the fluid. With β = compression coefficient ρ o = density at atmospheric pressure p a = atmospheric pressure

Directional valve with five annular channels in the housing for ports A, B, P and T. The spring chambers F 1 and F 2 remain outside the control area of the valve and can have a dedicated drain port (Figure

sum of the theoretical displacement flow Q 2th and the leaked oil Q 2L: The moment created M 2eff is M 2v smaller than the theoretical (hydraulic) moment M 2th (b): [...] The effective delivery flow Q 1eff (flow rate at the pressure connection) of a pump is smaller than the theoretical drive rotation speed Q 1th by the leakage losses Q 1L (product of drive speed and d [...] drive torque M 1eff on the pump shaft is greater than the theoretical drive torque M 1th by the moment losses M 1V ( Figure V 13 a ): In the case of the motor, the effective displacement flow Q 2eff is formed

placed under the full pressure, the pressure at the pressure/current controller (p/Q controller) is only slightly greater than the load pressure ( Figure P 36 ). If large flows need to be controlled, a [...] of one variable pump and several constant pumps , which can then be connected as desired ( Figure P 37 ). As larger masses are to be moved in the pump with the pump control than in the case of the control

based on changes in the resistance in an electrical conductor as a function of its length ( Figure P 14 ). These days, position measurement by potentiometer is mainly performed with potentiometers featuring [...] tend to offer better resolution than wire potentiometers (up to 0.01 mm). Advantage: high precision at a low price; disadvantage: these too are subject to wear.

binary code. The sampling frequency was internationally set at 8 kHz and the number of amplitude values is limited to 256 (8-Bit codeword) ( Figure P 33 ).

high response proportional valves and servo valves when the consumer ports are closed and at a system pressure p o. It results from the leakage around the control spool in the centre position (zero or positive [...] stage. It changes in line with the inlet pressure and the input current and reaches its maximum level at hydraulic zero ( Figure N 7 ).

(e.g. in guides or at seals). There is therefore available in the working element ( cylinder , motor) an operation pressure that is reduced by the pressure loss Δp. The power loss P v produced in this [...] Lasting pressure reduction as a 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

pressure associated with a fluid flowing at a subsonic rate. The pitot tube consists of a tube at a 90° angle, whose arm lies parallel to the direction of the flow ( Figure P 9 ). Pressure measured with this kind

and the displacement V 2: while the torque M 2 is determined by the load pressure p L and the displacement V 2: In general, all pumps (with the exception of valve-controlled pumps) can now also be used [...] energy (Q, p) into mechanical energy (M, n) by creating a certain torque and rotation speed. Neither is dependent on the other: the rotation speed n 2 is only dependent on the flow rate Q 1 introduced