Method for controlling an eccentric screw pump

The method optimizes eccentric screw pump operation by adjusting stator clamping based on simplified pressure measurements and pulsation analysis, eliminating the need for costly through-flow sensors and enhancing operational efficiency.

US20260210354A1Pending Publication Date: 2026-07-23SEEPEX GMBH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SEEPEX GMBH
Filing Date
2023-12-15
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

Existing methods for controlling eccentric screw pumps are inefficient and costly due to the need for expensive through-flow sensors to monitor and optimize operating parameters, leading to inaccurate stream estimates and potential process stoppages from unnoticed wear.

Method used

A method that uses simplified sensors, such as pressure sensors, to measure periodic operating parameters and adjust stator clamping based on average values and pulsation amplitudes to optimize pump operation without direct stream measurement.

Benefits of technology

Enables efficient and cost-effective control of eccentric screw pumps by iteratively adjusting stator clamping to minimize pressure pulsations and maximize average pressure, reducing the need for expensive sensors and improving operational efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A method for controlling an eccentric screw pump that has a stator, a rotor rotating in the stator, a drive for the rotor, a stator clamping device and a control device. The clamping of the stator can be set by the stator clamping device, wherein the control device is provided with an operating parameter of the pump, and the clamping of the stator is set / varied depending on the operating parameter. An operating parameter is used which pulses periodically with the pump frequency or a multiple of the pump frequency. An average value, averaged over at least one period, and the pulsation amplitude are determined from the operating parameter. The clamping is iteratively changed by the stator clamping device depending on the average value until a maximum value is reached and / or is iteratively changed depending on the pulsation amplitude until a minimum value of the pulsation amplitude is reached.
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