Energy-Saving Hydraulic System

MJC ENGINEERING has developed a hydraulic power system, Green Hydraulic Power, that provides higher machine yield, reduces noise emissions by 20 dBA, generates less heat, produces a shorter cycle time on various machine types, and requires a lower volume of oil—all of which results in a system that saves up to 70% in energy costs to reduce the user’s carbon footprint, according to the manufacturer.

The developer will offer the unit for OEM integration by other machine builders.

MJC develops CNC metal spinning, rotary forging, and flow forming machines, and is a supplier of production systems to the automotive, aerospace, and wheel manufacturers and their suppliers. 

The Green Hydraulic Power package is offered as standard on hydraulic power units provided with MJC machine using the Siemens SINAMICS variable-speed servo pump drive. High-demand hydraulic systems on many machine types significantly improve as a result of using this concept, according to MJC Engineering president Carl Lorentzen. 

“We saw that the servo pump could control pressure and flow, as they precisely convert electric energy into hydraulic power,” he explained. “In some cases, the use of control valves is partially or completely eliminated, depending on the application. We quickly realized our development could be used on many other types of machinery as an OEM component."

Applications for this system include any type of machinery using hydraulic power: metal forming machines and presses, injection presses, material handling equipment, stamping presses, etc.

Complete payback on the system is estimated at 12 to 24 months and the system has the additional benefit of control data output from the onboard diagnostic capability in the drive that supplies information for a predictive maintenance protocol (thus, it's ready for Industry 4.0.) 

The basics of pressure, temperature, and acceleration data measurement are standard, with additional data outputs on oil level, filter condition, running efficiency, and other parameters available.

This Green Hydraulic Power line is offered in 100, 200, and 300-gallon tank units rated up to 4,000 psi. It's available in two styles: one with a VFD, asynchronous motor, and internal gear pump; another that has a servo inverter, synchronous servo motor, and internal gear pump.

MJC Engineering now includes a subsidiary unit, Green Hydraulic Power Inc., which will market and further develop the technology. 

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