SINGLE-SHAFT ECCENTRIC SCREW PUMP

摘要

Provided is a single-shaft eccentric screw pump capable of feeding and charging a fluid with high flow rate accuracy, low pulsation and a long life. In this single-shaft eccentric screw pump (11), a male screw rotor (12) is fitted into the inner hole (13a) of a female screw stator (13), the rotor (12) and the stator (13) are rotatably supported independently of each other, and the rotational center axes of them are so disposed to be apart from each other. The rotor (12) and the stator (13) are rotationally driven by a rotor drive part (27) and a stator drive part (19), separately, and the rotor (12) and the stator (13) are rotated in the state of non-contact with each other.