Turbocharger and turbocharger wheel housing

摘要

A turbine housing 11 includes a first shell body 40 in which a reinforcement portion 42 is superposed on an outer peripheral face 53A of a lateral wall portion 53 of a scroll portion. Further, a reinforcement portion having a slit portion 43 that is partially discontinuous in a circumferential direction is provided as the reinforcement portion 42. Further, a shell body 30 and a base body 60 are combined with each other such that a pillar portion 65 is so located as to intersect with those ones of tangential lines T1, T2 of a turbine wheel 21 which pass a thin-walled portion 32A of the shell body 30, namely, such that the pillar portion 65 is located in a travel path of a fragment of the wheel 21 moving from a main body of the wheel 21 toward the thin-walled portion 32A.

主权项

1. A turbocharger wheel housing comprising:
a shell body having a scroll portion and a base body having an accommodation portion in which a wheel is accommodated, wherein a gas passage formed between the shell body and the base body, wherein: the shell body is composed of a first shell body and a second shell body that are formed separately from each other and combined with each other; the second shell body includes the scroll portion; the accommodation portion includes a wheel chamber in which the wheel is arranged, a communication portion that allows a gas to flow from the gas passage to the wheel chamber, and a pillar portion provided adjacent to the communication portion to block flow of the gas from the gas passage to the wheel chamber; the first shell body includes a reinforcement portion superposed on one of an inner peripheral face or an outer peripheral face of a peripheral wall of the scroll portion; the reinforcement portion has a slit portion that makes the reinforcement portion partially discontinuous in a circumferential direction; and the pillar portion is provided on a travel path of a fragment of the wheel moving from a main body of the wheel toward the slit portion.