State detection on eccentric screw pumps

By attaching a state sensor to the rotor or drive shaft of the eccentric screw pump, real-time detection and prevention of wear conditions are achieved, enhancing the reliability and efficiency of progressive cavity pumps.

EP4143439B1Active Publication Date: 2026-07-08VOGELSANG GMBH & CO KG
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
VOGELSANG GMBH & CO KG
Filing Date
2021-04-27
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Existing condition monitoring methods for progressive cavity pumps are unreliable in detecting wear conditions, leading to potential failure and increased maintenance costs, and lack the ability to prevent wear-inducing operating conditions.

Method used

A state sensor is directly attached to the rotor or drive shaft of the eccentric screw pump to measure physical quantities such as temperature, pressure, and vibration, allowing for real-time detection and prevention of wear by controlling the pump's operation.

Benefits of technology

Enables precise and spontaneous detection of wear conditions, preventing damage through immediate control measures, reducing downtime and maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to an eccentric screw pump having a stator (10) located in a pump housing; a rotor (20) located in the stator (20); a drive unit comprising a drive motor (40) and a drive shaft (30) which connects the drive motor to the rotor for transmitting a torque, wherein the rotor is guided in the stator so as to rotate about a rotating axle; and a state sensor (101) for detecting a state variable of the eccentric screw pump, wherein the state sensor is located on the rotor (20) or on the drive shaft (30) or is connected to the rotor or to the drive shaft by means of a signal line, and is spaced apart from the rotor or the drive shaft, for detecting a state variable on the rotor or on the drive shaft.
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