| 摘要 |
PURPOSE:To prevent a pump element from being damaged by checking the intrusion of foreign matter such as fractions of bolts and wafers without lowering a pump performance by the use of a metal net. CONSTITUTION:The top of a casing 1 in which a pump element 4 comprising a stator 2 and a rotor 3 is installed is closed, a suction port 11 is opened in the upper one side of the casing 1 in lateral direction, and a shield wall 7 opposed to the suction port 11 is provided inside the suction port 11. Thus, even if any foreign matter is sucked into the suction port 11 and enters the casing 1, the intrusion of the foreign matter into the pump element 4 is prevented. |
