Variable-speed servo pump drive design provides up to 70% energy savings
- Increases machine yield
- Reduces noise emissions
- Generates less heat
The Green Hydraulic Power® system is available as a standard package with 100, 200, and 300-gallon tank units rated up to 4,000 PSI.
MJC ENGINEERING reported it has developed a new hydraulic power system, termed Green Hydraulic Power®, that will provide higher machine yield, reduce noise emissions by 20 dBA, generate less heat, produce 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 an important 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 the 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 utilized on many other types of machinery as an OEM component.
“One press release from our ad agency generated substantial new business for the unit and we knew immediately we were onto something big,” he added.
Applications for this new system include any type of machinery using hydraulic power: metal forming machines and presses, injection presses, material handling equipment, stamping presses, etc. “We’re finding new applications almost every day now,” Lorentzen noted.
Complete payback on the system is estimated at 12-24 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 is 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. The servo pump results in as much as a 70% reduction in onsite servicing, according to the manufacturer.
This Green Hydraulic Power line is offered in 100, 200, and 300-gallon tank units rated up to 4,000 PSI. It is 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.