VARIABLE CAPACITY TYPE EXCHAUST TURBO-SUPERCHARGER

摘要

A variable capacity type exhaust turbo-supercharger, wherein bolts which fasten a variable nozzle mechanism do not loosen.  A  variable capacity type exhaust turbo-supercharger is provided with a turbine housing (1), a turbine rotor (3), a turbine shaft (3A), a bearing (5) for supporting the turbine shaft, a bearing housing (4), and a variable nozzle mechanism (8) for regulating the flow of exhaust gas.  The variable nozzle mechanism (8) is provided with a nozzle (6), a nozzle mount (7), a lever plate (11), and a drive ring (10).  A nozzle plate (9) with which the tip of the nozzle (6) makes contact is provided to an inner tube section (1a) of the turbine housing (1).  A sleeve member (12) is provided between the nozzle mount (7) and the nozzle plate (9) so as to be coaxial with a through hole (7a) and a through screw hole (9a).  The nozzle mount (7) and the nozzle plate (9) are connected together by fastening bolts (B) passed through the through hole (7a), the sleeve member (12), and the through screw hole (9a), in that order.  The thickness of that portion of the sleeve member (12) which is in contact with the nozzle mount (7) and the nozzle plate (9) is greater than the thickness of the center portion of the sleeve member (12).