A10VO series 5X Hydraulic pumps , Axial piston variable pump
Control devices
LA... – Pressure, flow and power controller
Pressure control equipped as DR(G), see page 12 (13).
Equipment of the flow control like DRS (DFR1), see page 14.
In order to achieve a constant drive torque with varying operating pressures, the swivel angle and with it the volume flow from the axial piston pump is varied so that the product of flow and pressure remains constant. Flow controller is possible below the power control curve. When ordering please state the power characteristics to be set ex works in clear text, e.g. 20 kW at 1500 rpm.
Controller data
Pressure controller DR see page 12.
Pressure and flow controller DR see page 14.
See data sheet 92709 for electric override LA.S
Control fluid consumption max. approx. 5.5 l/min
ED – Electro-hydraulic pressure control
The ED valve is set to a certain pressure by a specified variable solenoid current.
When changing the consumer (load pressure), this causes an increase or decrease in the pump swivel angle (flow) in order to maintain the electrically set pressure level.
The pump thus only delivers as much hydraulic fluid as the consumers can take. The desired pressure level can be set steplessly by varying the solenoid current.
As the solenoid current signal drops towards zero, the pressure will be limited to pmax by an adjustable hydraulic pressure cut-off (secure fail safe function in case of a loss of power, e.g. for fan drives). The response time characteristic curve of the ED-control was optimized for the use as a fan drive system. When ordering, specify the type of application in clear text.
Technical data
Sizes 10 to 100.
Nominal pressure 250 bar.
Maximum pressure 315 bar.
Open circuit.
Features
Variable pump with axial piston rotary group in swashplate design for hydrostatic drives in open circuit.
The flow is proportional to the drive speed and the displacement.
The flow can be infinitely varied by adjusting the swashplate angle.
Stable bearing for long service life.
High permissible drive speed.
Favorable power-to-weight ratio – compact dimensions.
Low noise.
Excellent suction characteristics.
Electro-hydraulic pressure control.
Power control.
Electro-proportional swivel angle control.
Short response times.
