BEEINFLUSSUNG DES WIRKUNGSGRADES VON HYPOIDGETRIEBEN DURCH TRIBOLOGISCHE MASSNAHMEN.

In hypoid gear couples, such as those often used in axle transmissions of motor vehicles, in addition to the sliding motion in the tooth height direction, a sliding motion in the longitudinal direction occurs. As a result, the gear efficiency deteriorates with an increase in the axle displacement. With the aid of a newly developed testing apparatus a number of parameters affecting the efficiency were investigated. The results obtained concerning the lubrication mode, the immersion depth and the type of lubricants show that in the heavy-load range the efficiency is clearly affected by the lubricant. In the fast-running range it is mainly high immersion depths which lower the efficiency - mainly high immersion depths which lower the efficiency - especially when viscous lubricants are used.