| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a discharge pressure guided into a back-pressure groove formed in a plate that is contacted to a side face of a rotor, from leaking to a central hole for a rotary shaft of the rotor penetrating through the plate. <P>SOLUTION: A back-pressure groove 57 which is formed in a plate 32 contacting to a side face of a rotor 22 and communicating with a high pressure chamber 54 is formed to copy an annular track drawn while a rotor 22 performs one rotation, by base ends Ei of vanes 24 that slidingly contact with a cam face 30A of a cam ring 30 and slide within vane grooves 23. <P>COPYRIGHT: (C)2013,JPO&INPIT |
