| 摘要 |
PURPOSE:To prevent fluid molecules from leaking in the engaging part of male and female parts by making the tooth tip of the male part in circular form and its forward and backward sides in symmetrical tooth profile. CONSTITUTION:The tooth tip of a male rotor M may be composed of any curve, and is formed of a small arc expanding outward, in addition tooth profiles on its forward and backward sides are symmetrical each other. On the other hand, the tooth bottom B-C-D of a female rotor F is generated by the tooth tip G-H of the male rotor M into a shape sunk inward. Consequently fluid molecules in the engaging part of both the rotors rebounds repeatedly in a leakage path as shown by an arrow X1 to reduce their leakage. |
