| 摘要 |
A water pump includes a body, a fixing member to which the body is fixed hermetically via a gasket, and an impeller which is fixed to an end part of a shaft supported rotatably by the body and housed in a vortex chamber formed in the body or in the fixing member. Further, the impeller has a circular plate into which the end part of the shaft is inserted and a plurality of blades radially provided on the circular plate at one side facing the fixing member or the other side facing the body and project from the circular plate to the fixing member side or the body side.In the water pump, the gasket has an intermediate plate with high rigidity and metal gaskets disposed between the intermediate plate and the body, and between the intermediate plate and the fixing member for sealing. The intermediate plate extends in radial direction to keep a predetermined axial distance between an inner peripheral portion of the intermediate plate and an end part of the blades facing to the fixing member or to the body.
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