Title:
スクリュー圧縮機
Document Type and Number:
Japanese Patent JP7189749
Kind Code:
B2
Abstract:
A screw compressor is provided which can reduce the pressure loss in a suction flow passage. A casing 12 of the screw compressor includes a bore 21 that accommodates a lobed portion 13A of a male rotor 11A and a lobed portion 13B of a female rotor 11B therein such that working chambers are formed in lobe grooves of the lobed portions, a suction port 22 located on an outer side in a rotor radial direction, and a suction flow passage 23 that communicates in a rotor axial direction with working chambers that are in a suction stroke. The suction flow passage 23 includes a male rotor side suction flow passage 26A located on an male rotor 11A side and besides on a downstream side with respect to a virtual plane C, and a female rotor side suction flow passage 26B located on an female rotor 11B side and besides on the downstream side with respect to the virtual plane C. The male rotor side suction flow passage 26A is formed such that a flow passage wall 27A on the outer side in the rotor radial direction is located at a position that is the same as that of a wall of the bore 21 as viewed in the rotor axial direction at least within a range of one half of an axial pitch P1 of the lobed portion 13A of the male rotor 11A from a suction side end surface of the lobed portion 13A in the rotor axial direction.
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Inventors:
Kotaro Chiba
Masahiko Takano
Shigeyuki Yorikin
Kenji Morita
Masahiko Takano
Shigeyuki Yorikin
Kenji Morita
Application Number:
JP2018227315A
Publication Date:
December 14, 2022
Filing Date:
December 04, 2018
Export Citation:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
F04C18/16; F04C29/00; F04C29/12
Domestic Patent References:
| JP61017191U | ||||
| JP2011247115A |
Attorney, Agent or Firm:
Patent Attorney Corporation Kaichi