Title:
SCREW ROTOR AND FLUID MACHINE BODY
Document Type and Number:
WIPO Patent Application WO/2019/188323
Kind Code:
A1
Abstract:
The effects of pressure and heat are reduced while the mass of a screw rotor is reduced. The outer periphery of this screw rotor has helical teeth extending a predetermined length in the axial direction, wherein a diametral cross-section of the screw rotor includes a rotor part having a prescribed thickness in the axial direction and constituting the helical teeth, and a hollow part extending toward an axial side from the axially inward surface of the rotor part, and the thickness of the rotor part differs at a side where the outer periphery of the screw rotor bears a heavy load and at a side where the outer periphery bears a light load.
Inventors:
HORIUCHI HIROSHI (JP)
Application Number:
PCT/JP2019/010465
Publication Date:
October 03, 2019
Filing Date:
March 14, 2019
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
F04C18/16; F01C1/16; F04C2/16; B22F3/105; B22F3/16; B29C64/00; B33Y80/00
Domestic Patent References:
| WO2019073679A1 | 2019-04-18 |
Foreign References:
| JP2006214366A | 2006-08-17 | |||
| JP2008127990A | 2008-06-05 | |||
| JP2002536593A | 2002-10-29 | |||
| US20160123327A1 | 2016-05-05 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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