| 摘要 |
The invention relates to a hydrodynamic retarder, in particular a water retarder, comprising a rotor turbine wheel, comprising a number (ZR) of blades and a stator turbine wheel, comprising a number (ZS) of blades. The rotor turbine wheel and the stator turbine wheel together form a toroidal working chamber, in which torque is transmitted from the rotor turbine wheel to the stator turbine wheel by means of a working medium. The blades have a profile with an inner diameter (DI) and an outer diameter (D A). The invention is characterised by the following: the mean number of blades (Zm), from half the sum of the number of rotor blades (ZR) and the number of stator blades (ZS), multiplied by the profile shift factor (fv), from the division of the outer diameter (DA,V) of a profile radially-displaced relative to a normal profile by the outer diameter (DA) of the normal profile, is fixed, depending on the working medium, where (Zm) is between 22 and 25 for a working medium of oil, in particular 23.5±0.35 and between 19 and 22 for a working medium of water or a water mixture in particular 20.5±0.35 and the normal profile is defined by the following relationship DI = 0.4±0.05 DA.
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