SCREW COMPRESSOR

WIPO Patent Application WO/2022/130861

A1

A casing of a screw compressor, according to the present invention, has an ejection-side inner wall surface facing an ejection-side end surface of a male rotor and female rotor. The ejection-side inner wall surface of the casing has a blocking region which blocks at least a portion of a trajectory of the axial communication path, which is a gap that periodically appears in the ejection-side end surface corresponding to changes in meshing due to rotation of the male rotor and the female rotor and is sandwiched by retracting surfaces of the male rotor and the female rotor. A group of grooves constituted by a plurality of grooves having a lengthwise direction is provided in the blocking region of the casing. The plurality of grooves are arranged in parallel in the circumferential direction of at least either the male rotor or the female rotor and are disposed such that sides extending in the lengthwise direction are adjacent to each other. The plurality of grooves is configured such that the lengthwise direction of one rotor from an inner circumferential side to an outer circumferential side inclines in the same direction as the direction of rotation of said one rotor relative to the radial direction of said one rotor.

CHIBA KOTARO (JP)
TAKANO MASAHIKO (JP)
YORIKANE SHIGEYUKI (JP)
MORITA KENJI (JP)
KAJIE YUTA (JP)

PCT/JP2021/041804

June 23, 2022

November 12, 2021

Click for automatic bibliography generation  

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)

F04C29/00

JPS59176487A	1984-10-05
JPS6336083A	1988-02-16
JPS49118811U	1974-10-11

KAICHI IP (JP)

View/Download PDF      PDF Help

Previous Patent: MEDICAL WORK ASSISTANCE DEVICE, MEDICAL WORK ASSISTANCE METHOD, AND PROGRAM

Next Patent: POUCH FOR MICROWAVE OVEN USE