CPC F16J 15/3236 (2013.01) [F16J 15/3248 (2013.01); F16J 15/3268 (2013.01)] | 10 Claims |
1. A coolant regulator comprising:
a housing having a coolant chamber;
a rotary vane arranged in the coolant chamber;
a drive shaft leading out of the coolant and configured to rotate the rotary vane;
a shaft seal which is rotationally fixed relative to the housing and which seals the coolant chamber from surroundings of the coolant regulator;
the shaft seal being inserted so as to seal against a housing inner lateral surface of a housing recess and sealingly enclosing the drive shaft;
an end portion of the shaft seal facing the rotary vane is a circular ring having a bead-shaped cross-section, said circular ring, under elastic deformation of the bead, seals an outer circumference with the housing inner lateral surface and encompasses a spreading ring on an inner circumference; and
said spreading ring, in order to limit an axial shift of the shaft seal directed toward the rotary vane, is opposite an axial stop which limits the axial shift of the shaft seal to a dimension d<s, wherein the dimension s is an axial distance between a bead center of the shaft seal in an undisplaced condition and an opening of the housing recess facing the rotary vane.
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