Variable pump
Hydraulic pump with a to the pressure, the flow rate or the state variable of an actuator . Servo pump Also known as variable displacement pump. The reason for using a variable pump is to improve the [...] in particular if the consumer frequently operates with low flow rates. Unlike a constant pump, the variable pump only supplies the necessary flow rate. This means no excess flow rate returns to the tank
On-stroke time of a pump
Time that a variable pump requires to adjust from zero to max. delivery flow (regulated). It depends on the adjustment mechanism, the pilot pressure and the adjustment travel, and also on the mass that [...] pumps and radial piston pumps generally provide good adjustment characteristics. The axial piston pump of inclined axis design has the largest mass to move.
Radial piston pump
Construction type of displacement pumps with multiple pistons, which, as in the radial piston pump, are arranged in a star shape around and perpendicular to the drive axis. They can be subjected to pressure [...] eccentric thrust ring. Movement beyond the zero position will reverse the flow rate direction ( reversing pump ). Pressurised from the outside (supported on the inside) : The pistons in the fixed cylinder block
Constant pump
Hydraulic pump with constant geometric displacement V 1 for each revolution and therefore a constant delivery flow Q 1 at constant drive speed n 1: Q 1 = V 1 · n 1.
Adjustable displacement pump
specific point (Figure E 11) . After adjustment such a pump operates like a constant pump . [...] Variable pump on which the geometric displacement can be set (limited) to a specific flow rate . This setting is made, e.g., by means of a stop screw that fixes the pivoting of the cylinder drum to a specific
Dual variable pump
design, either the toothed drive shaft with one pump as a drive for a second pump ( Figure V 20 ) — in this case both are adjusted using a sum power controller — or a transfer case is used for both pumps [...] Multi-circuit pump normally with an inclined axis design, but also a design according to the swash plate principle, in which two drives are included in one housing. In the case of an inclined axis design
Pump-flow motor
the rotary speed of the motor n and the volumetric efficiency factor ηv of the motor. Calculate the pump-flow of a motor directly and easily in our hydraulic calculator .
Displacement chamber machines
moved in a linear manner such as a pump with banked pistons/in-line piston pump , displacement chamber pump, axial piston machine , radial piston motor, radial piston pump .
Impeller
Hydraulic pump which operates in accordance with the hydrodynamic principle (centrifugal pump) and is used as a filling pump for hydrostatic pumps, particularly variable pumps (Figure I 3) . Advantage: