| 摘要 |
PROBLEM TO BE SOLVED: To prevent vanes from being separated by a pressure drop in a vane base end side space in a vane pump.SOLUTION: A vane pump 1 that is used as a fluid pressure source comprises: a vane ring 61 that faces base end parts of vanes 3; a vane ring housing groove 22 that is annularly open in an end face of a rotor 2 and houses the vane ring 61; an annular groove 25 that is annularly open in a bottom part 22A of the vane ring housing groove 22; and a vane base end side communication passage defined between the annular groove 25 and the vane ring 61. |
