| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that the super-compression of a high-pressure working fluid remaining in a working chamber before a piston 106 reaches the top dead center after a discharge process is ended, and the phenomenon of the forcible expansion of the working fluid of an extremely small amount before the suction process is started after the piston 106 reaches the top dead center cannot be prevented at the same time. SOLUTION: A vane tip groove 107a and a vane tip groove 107b are formed on a suction hole 105b side of the 107 and a discharge hole 104a side, respectively, on the tip of a vane 107, and a connection groove 104b is formed in a part for covering a vane groove 105a of an upper bearing 104. Installation positions of the vane tip grooves 107a, 107b and the connection groove 104b are determined so that they communicate with each other before and after a state (the top dead center) that the vane 107 is maximally pressed. COPYRIGHT: (C)2009,JPO&INPIT
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