| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump for a liquid refrigerant circulation, which has an outer gear and so on shaped in a cylinder with a bottom and still prevented from inclination during operation, thereby preventing generation of abrasion, vibration, and noise caused by increase of a friction coefficient of the gear.SOLUTION: A pump 1 circulating liquid refrigerant in a refrigerant circuit, includes: a main body 2 including a cylindrical gear accommodation chamber 2a having a bottom portion, and a suction port 2d and a discharge port 2e each opening in the gear accommodation chamber; an outer gear 4 having internal teeth and rotatably arranged in the gear accommodation chamber; an inner gear 3 which has external teeth meshing with the internal teeth of the outer gear, and a rotational axis of which is provided eccentrically from a rotational axis of the outer gear; a motor 6 discharging liquid refrigerant from the suction port to the discharge port by rotating the outer gear; a magnetic coupling 5 connecting the outer gear and a drive shaft 6a of the motor; and a support shaft (bearing 9) rotatably supporting the outer gear. |
