| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent sudden reduction of a pressure and perform satisfactory relief operation when relief operation is done in a pump provided with a relief valve such as an oil pump. SOLUTION: This relief valve structure consists of a relief valve 11, a valve housing 8 having a valve passage 8a through which the relief valve 11 slides, a relief flow-in part 9 formed on one end side of the valve housing 8, and a relief discharge part 10 formed in the valve passage 8a of the valve housing 8 and formed by communicating a small opening part 10a with a large opening part 10b. The relief discharge part 10 is constituted in such a way that a small opening part 10a side is positioned close to a relief flow-in part 9 side.</p> |
