Magnetic Coupling Bearing Ring for Contactless Torque Transfer
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Solution Overview
Problem
Magnetic coupling elements with bearing functions face challenges in reducing friction losses, heat generation, and wear while maintaining efficient torque transmission without material contact, particularly in applications requiring radial bearing and media separation.
Innovation Solution
A magnetic coupling element with a bearing function is designed using a drive-side and output-side coupling magnet, along with a non-rotatably mounted bearing magnet ring having the same polarity as the coupling magnet, which reduces friction through axial and radial magnetic interactions, and a housing element made of non-magnetic material for media separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bearing magnet ring is added to provide radial bearing function, then the bearing capability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the coupling magnet and bearing magnet ring into a single integrated magnetic coupling element. The coupling magnet portions transmit torque between shafts, while the bearing magnet ring portions provide radial bearing support, merging two functions into one component to reduce overall device complexity while maintaining bearing capability
Solution Approach 2:
The magnetic coupling element serves multiple functions simultaneously: torque transmission through coupling magnet portions and radial bearing support through bearing magnet ring portions. This multi-functional design improves reliability by integrating bearing capability without proportionally increasing device complexity
2Loss of energy
If magnetic poles are arranged to attract axially and repel radially, then friction losses are reduced, but manufacturing precision requirements increase
Solution Approach 1:
Different regions of the magnetic coupling element have different magnetic pole arrangements optimized for their specific functions. The coupling magnet portions have pole arrangements optimized for torque transmission, while the bearing magnet ring portions have pole arrangements optimized for radial bearing, allowing each region to operate with reduced friction losses without requiring extreme overall manufacturing precision
3Stability of the object's composition
If the bearing magnet ring is non-rotatably mounted, then bearing stability is improved, but torque transmission efficiency may worsen
Solution Approach 1:
The magnetic coupling element is segmented into distinct functional portions: coupling magnet portions for torque transmission and bearing magnet ring portions for radial bearing. This segmentation allows the bearing magnet ring to be non-rotatably mounted for stability while the coupling magnet portions efficiently transmit torque, as each segment is optimized for its specific function without interfering with the other
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 configuration significantly reduces friction losses and heat generation, enhances efficiency, and provides a stable bearing function while allowing for torque transmission without material contact, making it suitable for applications like metering and micropumps.
Implementation Method 1
at least one bearing magnet portion of the bearing magnet ring having the same polarity as a coupling magnet portion opposite the bearing magnet portion
Implementation Method 2
an output-side coupling magnet arranged on an output shaft, the output-side coupling magnet being magnetically coupled to the drive-side coupling magnet
Data Source
AI summary
The invention relates to a magnetic coupling element (100) with a magnetic bearing function. The magnetic coupling element (100) has a drive-side coupling magnet (109) arranged on a drive shaft (106), and also an output-side coupling magnet (115) arranged on an output shaft (112), the output-side coupling magnet (115) being magnetically coupled to the drive-side coupling magnet (109), and finally a bearing magnet ring (118) which is non-rotatably mounted with respect to the drive-side or output-side coupling magnet (109) or (115), a bearing magnet portion (133, 136) of the bearing magnet ring (118) having the same polarity as a coupling magnet portion (127, 130) opposite the bearing magnet portion (136).