Magnetic Pump Rotor Axial Offset Elastomer Disk Sealing
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Solution Overview
Problem
Existing magnetic coupling pump apparatuses face challenges in achieving effective sealing and reducing wear and acoustic noise due to inadequate axial bearing support, leading to reduced service life.
Innovation Solution
Incorporating an elastomer disk between the support element and axial bearing, with a magnetic pump stator and rotor arranged at an axial offset to generate an axial force that tensions the elastomer disk, enhancing sealing and compensating for alignment errors through a thrust washer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional axial bearing support is used in magnetic coupling pump apparatuses, then the structure is simple, but sealing effectiveness is insufficient and wear increases
Solution Approach 1:
An elastomer disk is introduced as an intermediary component between the axial bearing and the pump impeller. This elastomer disk serves as a mediator that enhances sealing effectiveness by deforming under axial magnetic forces to fill gaps and maintain contact pressure, while also compensating for alignment errors without requiring complex adjustment mechanisms.
Solution Approach 2:
The axial offset between the magnetic pump stator and rotor is optimized to generate specific axial magnetic forces that tension the elastomer disk. By changing the magnetic field parameters through controlled axial offset, the elastomer disk maintains optimal sealing pressure dynamically, improving sealing effectiveness without mechanical complexity.
2Duration of action of moving object
If conventional axial bearing support is used, then manufacturing is easier, but wear increases and service life decreases
Solution Approach 1:
The elastomer disk serves as a pre-positioned cushioning element that absorbs misalignment and run-out errors before they can cause damaging impacts on the axial bearing. This beforehand cushioning protects the bearing from wear and shock loads, extending service life while maintaining a relatively simple manufacturing process.
Solution Approach 2:
A flexible elastomer disk is used instead of rigid sealing elements. The flexibility of this thin film component allows it to deform and adapt to alignment variations, continuously maintaining sealing contact and reducing wear on the axial bearing, thereby extending service life without complicating manufacturing.
3Object-affected harmful factors
If conventional axial bearing support is used, then the structure is simpler, but acoustic noise increases
Solution Approach 1:
The axial magnetic forces, which could potentially cause unwanted movement or noise, are converted into a beneficial tensioning force on the elastomer disk. This tensioning maintains consistent sealing contact and stabilizes the axial bearing position, reducing vibration and acoustic noise while utilizing the existing magnetic field infrastructure.
Solution Approach 2:
The flexible elastomer disk acts as a vibration-damping element that absorbs acoustic emissions and mechanical vibrations from the axial bearing. This flexible film isolates noise-generating interactions while maintaining the relatively simple bearing configuration, reducing acoustic noise without adding complex noise-control mechanisms.
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
The solution improves sealing, reduces wear, and enhances acoustic properties by maintaining axial bearing alignment and run-out errors, resulting in a longer service life and improved operational performance.
Implementation Method 1
the magnetic pump stator and the magnetic pump rotor are provided as a result of the axial offset X to produce an axial force F(ax, mag) in the direction of the axial bearing and the elastomer disk
Implementation Method 2
the elastomer disk arranged between the support element and the axial bearing... maintaining axial bearing alignment and run-out errors
Data Source
AI summary
A pump apparatus has a rotor shaft, a pump impeller connected to the rotor shaft, at least one axial bearing which rotatably supports the rotor shaft at a side facing the pump impeller, a magnetic pump stator, a magnetic pump rotor which is connected to the rotor shaft, a containment can which extends between the stator and the rotor, and at least one central support element which is mounted in the region of the pump impeller. The pump apparatus has an elastomer disk which is arranged between the support element and the axial bearing. The stator and the rotor are arranged with an axial offset with respect to each other. The stator and the rotor are provided as a result of the axial offset to produce an axial force F in the direction of the elastomer disk.