| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear pump device capable of further suppressing generation of loss torque.SOLUTION: A seal mechanism 111 is constituted by an inner member 112, an annular rubber member 113, and an outer member 114. An outer peripheral wall of the inner member 112 has a flange part constituting a pressure receiving surface for generating propulsion power to a side in which the inner member 112 is separated from a gear pump 19 by pressure contact of the annular member 113 based on application of a delivery pressure of the gear pump 19 and increasing the propulsion power by increase of contact pressure of the annular rubber member 113 in accordance with increase of the delivery pressure. The Young's modulus of the inner member 112 is larger than the Young's modulus of the outer member 114. |
