To provide a pump capable of restraining an inclination of a pump rotor fixed to a tip part of a pump driving shaft in operation.
In this pump 2, a pump room 10 partitioned by a second end wall 9a on the opposite side of a first end wall 8a on one side in the axial direction is formed in a pump body 5, a pump rotor 13 is fixed to a tip part of a pump driving shaft 16 positioned in the pump room 10 by penetrating through the first end wall 8a, suction ports 30 and 31 are formed on opposite surfaces of the first end wall 8a and the second end wall 9a of predetermined positions corresponding to the pump rotor 13, and delivery ports 32 and 33 are formed on opposite surfaces of the first end wall 8a and the second end wall 9a of the predetermined positions corresponding to the pump rotor 13. The area opposed to the pump rotor 13 of the delivery port 33 of the second end wall 9a is larger than the area opposed to the pump rotor 13 of the delivery port 32 of the first end wall 8a.
日比 紀彦
松村 直都
渡邊 彰