Title:
SCREW ROTOR AND SCREW-TYPE FLUID MACHINE MAIN BODY
Document Type and Number:
WIPO Patent Application WO/2020/044715
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve the performance of a hollow screw rotor with respect to heat, pressure, corrosion, and the like. Provided is a screw rotor equipped with a screw part the outer circumference of which has a spiral tooth groove extending for a prescribed length in the axial direction, wherein a radial cross section of at least a portion of the screw part comprises cross sections of: an outer surface portion forming the tooth groove; an axial center portion; support portions connecting the axial-center side of the outer surface portion and an outer-radial side of the axial center portion; and a hollow portion formed by adjacent support portions in the rotation direction and an axial-center-side inner surface of the tooth bottom or the tooth tip. Of at least the radial cross section of the screw part, the axial center portion and/or the support portions, and the outer surface portion, comprise a cross section that is continuously connected as an integrated component of different members.
Inventors:
SUZUKI TOMOO (JP)
YABE TOSHIAKI (JP)
ITOU YUUJI (JP)
YABE TOSHIAKI (JP)
ITOU YUUJI (JP)
Application Number:
PCT/JP2019/022693
Publication Date:
March 05, 2020
Filing Date:
June 07, 2019
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
F04C18/16; F04C29/00
Foreign References:
| US20010031212A1 | 2001-10-18 | |||
| JP2001503119A | 2001-03-06 | |||
| JP2016196859A | 2016-11-24 | |||
| JPH05506904A | 1993-10-07 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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