Excavator Energy-saving Technology Research Based on Arm Independent Meter-in Valve
Developing hi-efficiency hydraulic valve by reducing meter-in and meter-out throttling loss is one of the main methods to reduce excavator fuel consumption.For the energy saving goal,the thought of reducing energy loss by designing a new arm valve is confirmed on the basis of energy loss mechanism of excavator hydraulic valve.And based on this thought,a hydraulic valve with independent arm meter-in solution is designed,including meter-in valve and arm valve spool design,and the control algorithm of them is also developed.The designed hydraulic valve is installed on one 21 t excavator and after commissioning of the electronic control system,the machine can fulfill all the operating performance requirement.Finally,a comparison test is implemented between this machine and another 21 t excavator which using the same diesel engine and hydraulic pumps.The results show that its fuel saving effect is obvious under the same grading conditions.
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维普
