Magnetically Engaged Pump Axial Bearing Replacement
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Solution Overview
Problem
Existing magnetically coupled pumps face challenges in maintaining a sealless magnetic engagement and allowing for the replacement of bearing supports without disrupting the magnetic coupling or requiring removal from mounting.
Innovation Solution
The design incorporates a rotatable carrier with radial and thrust bearing positions that can be axially removed and replaced without disassembling the pump, utilizing a magnetic drive and driven assembly with a cylindrical canister for sealless engagement, and a radial attachment flange for secure rotation, allowing for maintenance without removing the pump from its mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump is magnetically coupled with a fixed shaft and rotatable carrier, then sealless magnetic engagement is achieved, but replacement of bearing supports requires disruption of magnetic coupling or removal from mounting
Solution Approach 1:
The pump is divided into separable modules: the rotatable carrier assembly (containing bearing supports) can be independently removed from the stationary shaft assembly. This segmentation allows bearing replacement without disrupting the magnetic coupling between the drive assembly and driven assembly, as each module can be serviced separately while maintaining the integrity of the magnetic engagement system.
Solution Approach 2:
The rotatable carrier is designed to be axially removable from the stationary shaft, extracting the bearing support function into a separate, serviceable component. This allows the bearing supports to be taken out and replaced without affecting the magnetic coupling system, resolving the contradiction between maintaining sealless engagement and enabling easy repair.
2Reliability
If the pump rotor is rotatably mounted about a fixed shaft, then magnetic coupling is maintained, but maintenance requires pump removal from mounting
Solution Approach 1:
The pump architecture segments the rotatable carrier assembly from the stationary shaft assembly, allowing the carrier to be accessed and serviced independently. This segmentation enables maintenance of bearing supports without requiring removal of the entire pump from its mounting, as the carrier can be accessed through the pump housing while the magnetic coupling remains intact.
Solution Approach 2:
The rotatable carrier serves multiple functions: it supports the bearing supports, allows axial removal for maintenance, and maintains rotational coupling with the magnetic driven assembly. This multi-functionality enables maintenance accessibility while preserving the integrity of the magnetic coupling system.
3Stability of the object's composition
If bearing supports are integrated into the pump housing, then structural stability is improved, but replacement requires complete disassembly
Solution Approach 1:
The bearing supports are segmented from the pump housing by integrating them into the rotatable carrier assembly. This segmentation allows the bearing supports to be replaced by removing only the carrier assembly, rather than requiring complete disassembly of the pump housing, thus reducing device complexity while maintaining structural stability through the carrier's design.
Solution Approach 2:
The rotatable carrier assembly is designed with dynamic accessibility, allowing it to be rotated and removed axially from the pump housing. This dynamic design enables easy access to bearing supports for replacement while maintaining structural stability during operation, eliminating the need for complete pump disassembly.
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
Enables the replacement of bearing supports and maintenance of the magnetic coupling without disrupting the pump's operation, ensuring continuous functionality and reducing downtime.
Implementation Method 1
A magnetic engagement, including a magnetic drive assembly, a magnetic driven assembly associated with the pump rotor and a canister between the drive assembly and the driven assembly provides a sealless engagement between the drive assembly and the pump rotor.
Data Source
AI summary
A magnetically engaged pump includes a pump housing (10) with a rotatable magnetic drive assembly (28), a cylindrical canister (52) and a rotatable driven magnet assembly (34). This magnetic coupling is associated with a pump rotor (58) and a laterally positioned gear wheel (64) to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor (58) with an impeller (118) to define a centrifugal pump. Either pump includes a stationary shaft (40) to mount the driven magnet assembly (34) and pump rotor (58). A rotatable carrier (68) with bushings (80, 82) and thrust bushings (88. 90) coaxially supports the rotatable driven magnet assembly (34) and pump rotor (58).