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Energy Efficient Linear Drive Axis Using a Hydraulic Switching Converter
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Digital hydraulics uses simple and cheap on/off valves in order to replace expensive proportional valves. Furthermore, with fast switching hydraulic converters the energy efficiency can be raised compared to proportional ...
An Approximate Computational Method for the Fluid Stiction Problem of Two Separating Parallel Plates With Cavitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stiction forces exerted by a fluid in a thin, quickly widening gap to its boundaries can become a strongly limiting factor of the performance of technical devices, like compressor valves or hydraulic on–off valves. In ...
Sliding Mode Analysis of a Counterbalance Valve Induced Instability in an Electrohydraulic Drive
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper analyzes the dynamic effects of an electrohydraulic drive that uses a counterbalance valve for rod volume compensation. It shows that local stability analysis is not sufficient in this particular case to get ...
Modeling of a Fast Plate Type Hydraulic Check Valve
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Check valve dynamics plays an important role in many fluid systems, such as in compressors, hydraulic pumps, and hydraulic switching converters. Plate type check valves are a frequently employed valve type in dynamically ...
A Combined Variable Displacement–Digital Cylinder Hydraulic Drive for Large Presses With High Operating Frequencies
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this technical brief, a novel hydraulic drive for large forces and power ratings at relatively high operating frequencies combining variable displacement control and hydraulic digital control is introduced. Basic analog ...