| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump device capable of preventing the wear of sliding surfaces of a bearing. SOLUTION: In the pump device 100, since a groove connected to a fluid passage 57 in a pump chamber 6 and a communication path comprising a through-hole is opened at a fixed side slide surface 381 of a thrust bearing member 38, liquid flowing in the fluid passage 57 is sucked to a section between the fixed side slide surface 381 and a rotation side slide surface 417 of the sleeve 41 through the communication path. Consequently, sliding properties of the section between the fixed side slide surface 381 and the rotation side slide surface 417 are high since liquid flowing in the fluid passage 57 always exists between the fixed side slide surface 381 and the rotation side slide surface 417. Ablation powder generated between the fixed side slide surface 381 and the rotation side slide surface 417 can be discharged through the fluid passage 57. COPYRIGHT: (C)2010,JPO&INPIT
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