PUMP Power Control System - A4VSO- LR2,LRD

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A4VSO...LR2
– Power controller with hyperbolic characteristic
– The pump displacement is controlled by the power controller as
a function of the operating pressure so that a specified drive
power is not exceeded at constant drive speed
– Power changes from min to max via a spring
– Settings are easy to adjust – via only one adjusting screw
– Supplementary functions in the modular system, e.g.:
Hydraulic remote control
Pressure control
Flow control
Hydraulic stroke limitation
Mechanical stroke limitation
Hydraulic two-point controlLR2 Power controller, with hyperbolic characteristic
The power controller LR2 controls the pump displacement (flow rate)
as a function of the operating pressure so that a specified drive power
is not exceeded with constant drive speed.
p x Vg = constant
Precise control in accordance with the hyperbolic characteristic ensures
optimum utilization of the power.
Commencement of the control range can also be set mechanically.
The entire range of settings can be adjusted by means of a spring
and adjusting screw.
The pump is swivelled into its starting position (Vg max) by an adjusting
spring when depressurized.
The minimum and maximum swivel angle limitation can be adjusted
mechanically up to 50% of Vg max.
Range of settings: 35...350 bar commencement of control
The power characteristic is set by the manufacturer.
Please state clearly, e.g.: 50 kW at 1500 rpm.
Version D with pressure control
Pressure control is superimposed on the power control and can be
set between 20 and 350 bar. The value must be stated clearly.
When the pressure set on the pressure control valve is reached, the
pump switches to pressure control mode and only delivers as much
hydraulic fluid as is required to maintain this pressure.
1 A4VSO with hydraulic control device
1.1 Sandwich plate
2 Power control valve
3 Pressure control valve
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