HYDRODYNAMIC TORQUE CONVERTER

摘要

The invention relates to a hydrodynamic torque converter comprising: a toroidal casing (35), a rotationally embedded input shaft (37) with rotationally fixed pump impeller (31), a rotationally embedded output shaft (36) with rotationally fixed turbine impeller (32, 32', 32"), a set of adjustable guide blades (33) and a set of fixed guide blades (34). With regard to the working media flow direction, the set of adjustable guide blades (33) is located behind the turbine impeller (32, 32', 32") and in front of the pump impeller (31), while the set of fixed guide blades (34) is located behind the pump impeller (31) and in front of the turbine impeller (32, 32', 32"). The pump impeller (31) and the turbine impeller (32, 32', 32") are designed in such way that the inlet diameter (D321) of the turbine impeller (32, 32', 32") is smaller than the outlet diameter (d312) of the pump impeller (31); and that the pump impeller (31) is arranged to enable pumping of the working media in direction towards the rotational axis (38). Such a hydrodynamic torque converter enables the attainment of maximal efficiency in the range of speed ratios 1 T/np p is the rotational speed of the pump impeller (31) attached to the input shaft (37) and iit is the rotational speed of the turbine impeller (32, 32', 32") attached to the output shaft (36). The operating range of high efficiency is considerably wider than at previously known embodiments; furthermore the performance curve of the turbine torque is more favourable.