Title:
CASING FOR EXHAUST TURBOCHARGER TURBINE, EXHAUST TURBOCHARGER TURBINE, AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/173298
Kind Code:
A1
Abstract:
Provided is a casing 21 for an exhaust turbocharger turbine 2, configured so as to house a turbine rotor 23 to be driven by exhaust gas and form a spiral scroll 22 serving as a path for supplying the exhaust gas to the turbine rotor 23, wherein the scroll 22 includes a first region 222a extending from a spiral origin position 222s to a predetermined angle θ and a second region 222b extending from the predetermined angle θ to a spiral end position 222e, with the surface area of an interior wall thereof decreasing from the spiral origin position 222s toward the spiral end position 222e, and the interior wall at the first region 222a has a lower surface roughness than that at the second region 222b.
Inventors:
YOSHIDA TOYOTAKA (JP)
GUPTA BIPIN (JP)
DAMMOTO YOSUKE (JP)
AKIYAMA YOJI (JP)
GUPTA BIPIN (JP)
DAMMOTO YOSUKE (JP)
AKIYAMA YOJI (JP)
Application Number:
PCT/JP2017/012179
Publication Date:
September 27, 2018
Filing Date:
March 24, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD (JP)
International Classes:
F02B39/00
Domestic Patent References:
| WO2015097872A1 | 2015-07-02 |
Foreign References:
| JP2016098670A | 2016-05-30 | |||
| JP2016118099A | 2016-06-30 | |||
| JP4275081B2 | 2009-06-10 |
Other References:
See also references of EP 3561260A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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