| 摘要 |
PURPOSE:To prevent a reversed flow of gas to the suction side due to the engagement of rotors during the suction, decrease the suction pulsation, suppress unpleasant noises, and improve the volume efficiency by inserting a baffle plate between a suction port and rotors. CONSTITUTION:When a male rotor 7 and a female rotor 8 are rotated, the inflow gas is introduced into a space formed by a tooth profile gap between the male rotor 7 and female rotor 8 and the inner peripheral surface of housing spaces 5, 6 and is shifted while being joined and compressed at the boundary portion between the housing spaces 5, 6. The gas entering a suction chamber 17 during the compression action is guided by a baffle plate 19 and is shifted to the tip portion 17a of the suction chamber, thus being made easy to enter into a compression chamber 25, and the volume efficiency is improved. In addition, the gas periodically blown up toward a suction port 18 when a tooth profile passes due to the rotation of both rotors 7, 8 is bent to the compression chamber side 25 by a baffle plate 19, thus inflicting no effect on the inflow gas. |
