| 摘要 |
PURPOSE:To reduce the weight, improve the productivity, and reduce the cost of a pump by constructing a housing of aluminum, aluminum alloy, or resin material, and providing filler metal made of porous sintered metal with excellent wear resistance on the cylindrical inner surface of said housing. CONSTITUTION:A housing 14 is made of aluminum, aluminum alloy, or resin material. On the surface of its cylindrical inner periphery is provided filler metal 15 made of wear resistant porous sintered metal, thereby preventing the wear of the sliding surface of vanes 5. |
