公开(公告)号：US10018074B2

公开(公告)日：2018-07-10

申请号：US15121452

申请日：2015-02-26

Applicant: VOLVO TRUCK CORPORATION

Inventor： Peter Tennevall ,  Daniel Blom ,  Niklas Hartler

IPC: F01D11/02 ,  F01D25/18 ,  F02B41/10

CPC classification number: F01D25/183 ,  F01D11/02 ,  F02B41/10 ,  F05D2220/40 ,  F05D2240/50 ,  F05D2240/55 ,  F05D2240/60 ,  F05D2250/38 ,  F05D2260/6022 ,  Y02T10/163

Abstract: A turbocompound unit includes a bearing housing and a turbine shaft being rotatably supported in the bearing housing, wherein one end of the turbine shaft is provided with a turbine wheel. The turbocompound unit further includes a diffuser duct in which the turbine wheel is arranged to rotate, an exhaust collector extending from the diffuser duct to an exhaust outlet, and a sealing arrangement positioned in the vicinity of the turbine wheel for preventing oil from escaping from the bearing housing to the diffuser duct. The exhaust collector forms part of a buffer gas duct that is arranged to supply exhaust gas from the exhaust collector to the sealing arrangement for pressurizing the sealing arrangement.