| 摘要 |
Durability of a vacuum pump is prevented from degrading by suppressing abrasion of a rotor and a side plate. The vacuum pump has a hollow cylinder chamber S having an opening at an end portion of a casing body, a rotor 27 which is rotationally driven in the cylinder chamber S, a side plate 26 for blocking the opening of the cylinder chamber S, and a pump cover 24 which is disposed at the opposite side to the rotor 27 so as to sandwich the side plate 26 between the pump cover 24 and the rotor 27, and the side plate 26 is provided with an intercommunication port 261 which confronts a shaft hole 27A of the rotor 27 and intercommunicates with a space 80 between the side plate 26 and the pump cover 24. |
