This paper aims at the requirement of tracklayer gearing controlling racing power loss (for short racing loss), analyzed mechanism of generating racing loss of a high-power hydraulic retarder. By adding different number of baffle-plate equipment, racing loss was reduced. Using CFD technology, this paper studied contrastively the racing loss of hydraulic retarder in different condition, and compared with experiment result. The result indicated that the racing loss reduced obviously after fixing baffle-plate equipment, and the CFD simulation results agree well with the experimental results.
In this paper, several new main compositions are presented with Mn2+ substituted by Ti4+
and Co2+ in Manganese-zinc ferrites in consideration of the strong influence of Ti4+ and Co2+ on
thermal stability by different mechanisms. Moreover, the effects of these substitutions on such
parameters as permeability, electrical resistivity, density, and power loss are analyzed. The
experimental results show that the proper substitution of Ti4+ or Co2+ in manganese-zinc ferrites can
increase the thermal stability remarkably. Furthermore, the effects of composition of Ti4+ and
Co2+substitutions have interactive process, especially when Manganese-zinc ferrites with high
thermal stability in 20°C~140°C are achieved when the substitution of Ti4+ is 0.10mol%and Co2+ is
0.05mol%.
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