Abstract
Low carbon manufacturing is the specifically scientific problem deriving from two major worldwide challenges – “energy crisis” and “greenhouse effect”. Quantifying the energy dissipation in operating condition is the basis to achieving low carbon manufacturing of the high-end equipment, but the energy-saving technologies on large and medium-sized hydraulic press are still in exploration stage. For the purpose of providing guidance for improving of Large and medium-sized hydraulic presses LMHP system's energy efficiency and breaking through the limitations of existing researches, an analytical approach for calculating energy flow in LMHP system is proposed in order to find out the root of low energy efficiency in this research. The traditional classification of Hydraulic presses HP system is not appropriate for analyzing energy flow, so HP system is newly divided into six parts based on the characteristics of each component's energy conversion. Then, in order to avoid the problem of numerous and unknown parameters of theoretical model, the basic formulas of energy consumption are presented so that there are only a few unknown coefficients that would be tested in a series of experiments. Furthermore, a practical simplification method is proposed for LMHP system's energy flow model according to LMHP system's structural features. Finally, large sheet stamping hydraulic press is taken as the object to verify the validity of this method and the main reasons of low efficiency of low efficiency are founded that load characteristics don't match with drive mode.
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