| 摘要 |
PURPOSE: To prevent the first fluid from entering a motor on the second fluid side by providing a uni-directional dynamic pressure bearing which has the non-return valve function to guide the second fluid only to the first fluid side and is provided with a dynamic pressure generating groove between the first fluid and the second fluid. CONSTITUTION: When a waterproof motor 5-1 for a pump is driven, a rotary cylindrical ceramics sliding member 92a having a dynamic pressure generating groove 99 is rotated, and the pumping function to pump the second fluid 94 in a fluid storage chamber 93 to the side of the pressurized fluid which is the first fluid, i.e., to the dynamic pressure side is generated by a uni-directional dynamic bearing 92. The fluid 94 in the fluid storage chamber 93 passes through the radial cap between a rotary dynamic bearing component 92a and a fixed cylindrical ceramics sliding member 92b through a communicating tube 95, and one-sidedly flows to the pressurized fluid side against the pressurized fluid. The uni-directional dynamic bearing 92 constitutes a means to pass the fluid 95 only in one direction, and a waterproof sealing mechanism having the perfect non-return valve function can be constituted. |
