| 摘要 |
PURPOSE:To enable to rotate a gear smoothly by a method wherein a material, having self-lubricating property and a small thermal expansion coefficient, is employed for a part, to which the hydraulic motor is contacting under being rotated. CONSTITUTION:The hydraulic motor is equipped with a water discharging port 501 and a port 511 on the side wall 11 thereof. Both of outer gear 30 and inner gear 20 are made of a material of carbon graphite. Accordingly, the inner gear 20 is driven to rotate counterclockwise together with the outer gear 30 under meshing with the same, water is discharged out of the water discharging port 501 through the port 511, the lubricating property is maintained even when the hydraulic motor is rotated in a high speed, the gears will never receive a bad effect due to temperature rise and the gears may be rotated smoothly. |
