Internal Gear Pumps for Variable Speed Drives

As a result of increased environmental awareness and growing competitiveness of rival drive technologies, the energy consumption and noise generation of plant and machinery have become decisive criteria. By using variable speed pumps, it is possible to create energy-efficient hydraulic drives.

Advantages

• Reduced energy requirement, especially so in part-load and no-load running conditions
• Lower noise levels from the use of BUCHER internal gear pumps and by reducing the speed in part-load and no-load running conditions
• Continuosly variable flow rate (0% bis 100%) 
• Dependent on model, BUCHER internal gear pumps can perform any duty from that of unidirectional pump up to bi-directional pump/motor with pressure at either port
• Intermittent operation at high pressure and low speed, pressure-holding with no net flow is possible
• As determined by the dynamic requirements of the system, BUCHER internal gear pumps can be driven by servo-motors or by a variety of asynchronous motors

Schematic function

Applications

• Plastic injection moulding machines
• Sheet metal processing machines
• Ruber presses
• Waste paper presses