MULTI-STAGE SCREW COMPRESSOR - HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD

Title:

MULTI-STAGE SCREW COMPRESSOR

Document Type and Number:

WIPO Patent Application WO/2020/162046

Kind Code:

A1

Abstract:

Provided is a multi-stage screw compressor with which an intermediate shaft portion of a rotor can be made shorter.　A two-stage screw compressor is provided with: a front-stage compressing mechanism 1 which has a front-stage male rotor 11A and a front-stage female rotor 11B, and which compresses air; and a rear-stage compressing mechanism 2 which has a rear-stage male rotor 12A and a rear-stage female rotor 12B, and which further compresses the air compressed by the front-stage compressing mechanism 1. The front-stage male rotor 11A and the rear-stage male rotor 12A are configured to be coaxial, and the front-stage female rotor 11B and the rear-stage female rotor 12B are configured to be coaxial. An axial discharge pocket 34 of the front-stage compressing mechanism 1 and an axial intake pocket 39 of the rear-stage compressing mechanism 2 are arranged in a positional relationship partially overlapping one another in the axial direction of the rotor, and are separated from one another by a separating wall 41.

Inventors:

KASAHARA MASAYUKI (JP)
NIKAIDO SHO (JP)
ISHIZUKA YUKI (JP)

Application Number:

PCT/JP2019/049140

Publication Date:

August 13, 2020

Filing Date:

December 16, 2019

Export Citation:

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Assignee:

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)

International Classes:

F04C18/16; F04C23/00; F04C29/12

Foreign References:

JPS62168987A	1987-07-25
JPS6336086A	1988-02-16
JPS62183091U	1987-11-20
CN206636781U	2017-11-14
JP2017166401A	2017-09-21

Other References: