Eccentric-screw pump with replaceable rotor and stator

摘要

An eccentric-screw pump has an axially split stator having axially opposite intake and output ends and an elastomeric liner defining an axially throughgoing passage. Respective intake and output housings are releasably secured to the intake and output ends of the stator. An axially extending screw rotor in the passage has an end in the intake housing. A drive includes a rotatable universal joint having a pair of relatively swivelable parts in the intake housing. Respective generally complementary formations on the end of the rotor and on one of the universal-joint parts can fit axially together to rotationally couple the one universal-joint part with the rotor. A latch secures the formations axially together for angular force transmission between the one universal-joint part and the rotor.

主权项

1. An eccentric-screw pump comprising:
an axially split stator having axially opposite intake and output ends and an elastomeric liner defining an axially throughgoing passage; respective intake and output housings; means releasably securing the intake and output housings to the intake and output ends of the stator; an axially extending screw rotor in the passage and having an end in the intake housing; a drive including a universal joint having a pair of relatively swivelable parts in the intake housing; respective generally complementary formations on the end of the rotor and on one of the universal-joint parts fittable axially together to rotationally couple the one universal-joint part with the rotor; and latch means for securing the formations axially together for angular force transmission between the one universal-joint part and the rotor.