Drive Multiple Pumps from a Single Motor
Multi-pump drives are common sight in mobile hydraulic systems. These drives consist of a gear drive inside a bell housing that connects to a gasoline or diesel engine. The opposite side contains one or more standard 2- or 4-bolt flanges for mounting hydraulic pumps. This configuration provides several benefits. For one, two or more identical pumps can be connected to provide nearly identical hydraulic output flow from each. Or different sized pumps can be used provide output flow proportional to the displacement of each pump.
Designers of industrial hydraulic systems now have this option with the Lectric Drive, offered by Regal Beloit’s Durst Div., Florence, Ky. Unlike conventional boxes for industrial applications, the Lectric Drive does not require an adapter flange and shaft coupling to mate the C-face flange of the pump to that of the motor. Instead, the Lectric connects directly to Regal Beloit’s Marathon brand motors. This convenient setup not only saves space and weight but eliminates the number of components and reduces assembly time.
By mounting a hydraulic or pneumatic clutch between each pump, the Lectric Drive also provides a compact and convenient way of providing alternating or standby pump operation. For example, each time pump power is needed, a control could engage one clutch and disengage the other. Therefore, the life of both pumps could be extended because they would both operate a half the normal duty cycle. As a pump standby system, it would allow removing one pump for service or repair while the other continues to run the system. Of course, appropriate safety precautions should be strictly followed whenever working on any hydraulic, mechanical or electric system.
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