Eccentric Screw Compressor Rotor Connector Exposure Mechanism
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Solution Overview
Problem
Eccentric screw pumps face challenges in maintenance and repair due to complex disassembly requirements, particularly in accessing and replacing the rotor-end and drive-end connectors, which hinders efficient maintenance and increases downtime.
Innovation Solution
The design incorporates a displaceable second element that can be pushed axially onto a fixed first element within the pump housing, allowing for exposure and separation of rotor-end and drive-end connectors without disassembling the pump housing, enabling easy replacement of the rotor and stator without detaching the coupling, and providing additional separation points for independent drive train separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pump housing is designed as a one-piece structure, then the structural integrity and simplicity are improved, but the accessibility of rotor-end and drive-end connectors for maintenance is worsened
Solution Approach 1:
The pump housing is divided into multiple separable sections: a first housing section containing the rotor-end connector and a second housing section containing the drive-end connector. These sections can be independently separated to expose the connectors for maintenance while maintaining the overall structural integrity when assembled. The segmentation allows maintenance access without compromising the pump's structural stability during operation.
2Ease of repair
If the rotor-end connector is made accessible by disassembling the pump housing, then the ease of repair is improved, but the maintenance time and complexity are worsened
Solution Approach 1:
The pump housing is pre-configured with separable first and second housing sections that are designed to be quickly detached from each other. The separation mechanism is prepared in advance, allowing maintenance personnel to access the rotor-end and drive-end connectors by simply separating these pre-positioned sections rather than disassembling the entire pump housing. This preliminary structural arrangement significantly reduces maintenance time and complexity.
3Ease of repair
If additional separation points are added to the drive train, then the ease of repair and modular replacement are improved, but the device complexity is worsened
Solution Approach 1:
The drive train is segmented into modular components with defined separation points: the rotor-end connector connecting the rotor to the coupling rod, and the drive-end connector connecting the drive shaft to the coupling rod. These segmentation points create independently replaceable modules, allowing wear parts to be replaced without affecting other components. The segmentation is designed to be straightforward, with each separation point using standardized connection mechanisms that minimize overall device complexity while maximizing repairability.
Data Source
AI summary
An eccentric screw pump has a stator, a rotor in the stator, a drive for the rotor, and a pump housing between the stator and the drive and having an opening between for receiving the medium being pumped. A releasable drive-end coupling connects a connecting shaft of the drive to a coupling rod, and a rotor-end releasably connects the coupling rod to the rotor at a separation point. A rotor stub connects the rotor to the rotor-end coupling and is separable from the rotor at the separation point. A drive-end housing collar secures the pump housing to the drive. A rotor-end housing collar has a fixed first element fixed relative to the pump housing and an axially displaceable second element that is releasably fixable to the stator and that can be pushed axially toward the housing opening of the pump housing onto the first element to expose the separation point.