| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress degradation in the flatness of a member on a fore end side of a bolt attributable to the fastening of a bolt in a rotary type fluid mechanism. <P>SOLUTION: In a rotary type compression mechanism, an annular second cylinder and a rear head (25) layered in the axial direction are fastened to each other by a plurality of second bolts (41) aligned in the circumferential direction and passed in the axial direction. A groove (81) extending inwardly in the radial direction from an outer circumferential edge of an abutting face (25k) and suppressing any change of flatness of an upper end face of the second cylinder according to the fastening of a set of bolts (41, 41) is formed in a part of an area from the inner periphery of the abutting face (25k) to the outer circumference thereof between at least a set of second bolts (41, 41) circumferentially adjacent to the abutting face (25k) of the second cylinder of the rear head (25). <P>COPYRIGHT: (C)2012,JPO&INPIT |
