Single-shaft eccentric screw pump

Abstract

The present invention provides a single-shaft eccentric screw pump that allows for easy adjustment of the tightness or clearance between the rotor and stator, and also enables automation. The single-shaft eccentric screw pump (1) comprises: an input shaft (60) that is rotated by the power of a driver; a rotor (5) that is connected to the input shaft (60) in a manner that enables eccentric rotation; a connector (9) that directly connects the input shaft (60) to the rotor (5) or indirectly connects them via a connector shaft (7); and a stator (12) through which the rotor (5) can be inserted. The single-shaft eccentric screw pump (1) can be formed in a manner in which either or both of the outer diameter of the rotor (5) and the inner diameter of the inner hole (12a) of the stator (12) are made smaller as they move from one end toward the other end, or in a manner in which the eccentricity of the rotor changes. The single-shaft eccentric screw pump (1) also comprises a telescopic mechanism (50) that causes the rotor (5) to move closer to or further away from the stator (12) by extending or retracting any or both of the input shaft (60), the connector shaft (7), and the connector (9) in the axial direction. none.

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