Eccentric Screw Pump Stator Clamping Automation
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Solution Overview
Problem
Eccentric screw pumps face challenges in efficient adjustment and clamping, requiring manual retensioning which is time-consuming and inefficient, especially under changing operating conditions.
Innovation Solution
The integration of actuators connected to a control device that automates the retensioning and adjustment of the stator in the eccentric screw pump, allowing for real-time optimization based on operating parameters and status information, such as power consumption, back pressure, and volume flow, using electric, hydraulic, or pneumatic drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual retensioning of the stator is used, then the pump can be adjusted after wear, but the process is time-consuming and inefficient
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated actuation system. The actuator (electric, hydraulic, or pneumatic) automatically adjusts the position of the shell segments and stator, eliminating the need for manual retensioning operations while maintaining the adaptation capability after wear.
Solution Approach 2:
The pump system performs its own adjustment automatically through the integrated actuator and control device. The control device monitors operating parameters and autonomously actuates the shell segments to maintain optimal stator tension, making the system self-adjusting without external manual intervention.
2Productivity
If automated actuators are integrated for stator positioning, then adjustment efficiency is improved, but device complexity increases
Solution Approach 1:
The actuator serves multiple functions: it positions the shell segments, adjusts stator tension, and can compensate for wear. The control device integrates monitoring of multiple parameters (power consumption, back pressure, volume flow) and coordinates the adjustment process, making the added complexity serve multiple purposes rather than adding unnecessary complexity.
3Reliability
If the stator is clamped with shell segments, then the stator can be securely held, but adjustment and retensioning becomes more complex
Solution Approach 1:
The clamping device transitions from a static fixed clamping arrangement to a dynamic adjustable system. The shell segments can be actively positioned by the actuator to adjust clamping force and stator tension, allowing the system to adapt to different operating conditions and wear states while maintaining secure clamping.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables continuous optimization of pump efficiency, reduces starting and operating torques, and extends the service life by automatically adjusting the stator tension, ensuring optimal performance under varying conditions.
Implementation Method 1
The integration of actuators connected to a control device that automates the retensioning and adjustment of the stator in the eccentric screw pump
Implementation Method 2
at least one stator (1) made of an elastic material... the stator or the stator half-shells rest with end sealing surfaces against corresponding sealing surfaces
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an eccentric screw pump comprising at least one stator (1) made from an elastic material and a rotor (2) that is rotatable in the stator (1), wherein at least some regions of the stator (1) are surrounded by a stator casing (3), and the stator casing (3), as a casing split along its length, consists of at least two casing segments (19) and forms a stator clamping device by means of which the stator can be clamped against the rotor (2) in the radial direction, wherein the stator clamping device has one or more movable adjusting elements which work on the casing segments (19) to adjust and clamp the stator. Said pump is characterised in that the stator clamping device comprises one or more actuators which are connected to the adjusting elements or are equipped with adjusting elements for an automated advancement of the stator.