THRUST ABSORBING PLANETARY TRACTION DRIVE SUPERTURBO

摘要

Disclosed are embodiments of thrust absorbing planetary traction drives that utilize roller-shaft traction interfaces that are slanted to absorb thrust created on a turbo shaft by a turbine or compressor. Slanted traction surfaces on the sun portion of the turbo shaft are slanted inwardly so that the turbo shaft remains centered in the planetary traction drive. Either double roller planets or single roller planets can be used to absorb thrust in the axial direction of the turbo shaft. Various curved and slanted surfaces can be utilized to create traction interfaces that hold and stabilize the turbo shaft both axially and radially.

主权项

1. A planetary traction drive for a super-turbocharger that is both mechanically driven by an engine system and driven by exhaust gases from said engine system comprising:
a turbo shaft; a turbine connected to one end of said turbo shaft; a compressor connected to an opposite end of said turbo shaft; a first slanted traction surface formed on said turbo shaft, said first slanted traction surface slanted at a first angle in a first direction; a second slanted traction surface formed on said turbo shaft, said second slanted traction surface slanted at a second angle, said second angle being substantially equal to and in an opposite direction of said first angle; at least one double roller planet having a first roller and a second roller, said first roller having a first roller outer traction surface that engages said first slanted traction surface of said turbo shaft to form a first roller-shaft traction interface, said second roller having a second roller outer traction surface that engages said second slanted traction surface of said turbo shaft to form a second roller-shaft traction interface between said second roller and said turbo shaft, said first roller-shaft traction interface and said second roller-shaft traction interface locating said turbo shaft axially and creating axial forces on said turbo shaft that counteract thrust forces generated in an axial direction on said turbo shaft.