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1. (WO2018019318) ROTOR/STATOR SYSTEM WITH AN INLET FUNNEL FOR AN ECCENTRIC SCREW PUMP

Pub. No.:    WO/2018/019318    International Application No.:    PCT/DE2017/000219
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Sat Jul 22 01:59:59 CEST 2017
IPC: F04C 13/00
Applicants: NETZSCH PUMPEN & SYSTEME GMBH
Inventors: STROHHOFER, Josef
Title: ROTOR/STATOR SYSTEM WITH AN INLET FUNNEL FOR AN ECCENTRIC SCREW PUMP
Abstract:
A rotor/stator system (12) for an eccentric screw pump (10) comprises a stator (14), which has a stator pitch and a screw thread-shaped inner circumferential surface (16) with N+l thread paths, and a rotor (18), which has a screw-shaped outer circumferential surface with N thread paths, wherein at least some sections of the rotor are received in the stator. The rotor/stator system additionally comprises a main section (20), in which a sealing line between the stator and the rotor is provided, and an inlet-side end section (22), which adjoins the main section and in which a sealing line-free inlet funnel (24) is formed between the stator (14) and the rotor (18) along a funnel length. The screw thread-shaped inner circumferential surface (16) of the stator (14) is formed both in the main section (20) as well as in the inlet-side end section (22).