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1. (WO2017149670) BEARING DEVICE AND EXHAUST TURBINE SUPERCHARGER

Pub. No.:    WO/2017/149670    International Application No.:    PCT/JP2016/056294
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 02 00:59:59 CET 2016
IPC: F16C 33/66
Applicants: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
三菱重工エンジン&ターボチャージャ株式会社
Inventors: KOJIMA, Yuya
小島 優也
ISHIZAKI, Tatsuya
石崎 達也
DAMMOTO, Yosuke
段本 洋輔
AKIYAMA, Yoji
秋山 洋二
Title: BEARING DEVICE AND EXHAUST TURBINE SUPERCHARGER
Abstract:
The present invention improves the drainability of lubricating oil. The present invention comprises: a rotating shaft (14); a journal bearing that is provided to the rotating shaft (14) and rotationally supports the rotating shaft (14); a bearing housing part that houses the journal bearing; and a drain oil space chamber (47) that acts as an oil drainage passage that communicates with the bearing housing part, is provided along the periphery of the rotating shaft (14), and is formed to open downward. Within a region that is in and above a horizontal plane H that passes through the center of the rotating shaft (14), the smallest cross-sectional area of the oil drainage passage in a radial-direction cross-section thereof is on the anterior side in the rotational direction of the rotating shaft (14) with respect to a vertical plane P that passes though the center (O) of the rotating shaft (14), and the largest cross-sectional area of the oil drainage passage in the radial-direction cross-section is on the posterior side in the rotational direction of the rotating shaft (14) with respect to the vertical plane that passes through the center (O) of the rotating shaft (14).