Magnetic Bearing Module Peg Notch Alignment
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Solution Overview
Problem
Magnetic bearing modules face challenges in maintaining precise guiding of shafts due to manufacturing tolerances and mechanical constraints, leading to reduced precision and potential deformations under varying temperatures and loads.
Innovation Solution
The magnetic bearing module incorporates a position sensor with symmetrical pegs and notches for precise alignment and assembly, allowing for easy assembly and maintaining alignment between the sensor and bearing axes, even under temperature variations, using cylindrical pegs with chamfered ends and elongate notches for precise fitting, reducing additional mechanical constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sliding mounting is used for the position sensor with the magnetic bearing, then the assembly is easier to manufacture, but the offset between the sensor axis and bearing axis increases, reducing guiding precision
Solution Approach 1:
The patent introduces a mounting structure with accommodating notches and pegs as an intermediary mechanism between the position sensor and magnetic bearing. The notches receive the pegs to establish precise alignment, acting as a mediator that transfers and maintains the desired geometric relationship while accommodating manufacturing tolerances.
Solution Approach 2:
The mounting structure is designed with pre-defined notches and pegs that establish the correct alignment before the final assembly is completed. The notches are positioned to receive the pegs at the exact locations needed to minimize offset, ensuring precision is built into the assembly process itself rather than requiring post-assembly adjustment.
2Manufacturing precision
If a tight mounting is used for the position sensor with the magnetic bearing, then the offset between axes is minimized, but mechanical constraints and deformations increase under temperature variations and loads
Solution Approach 1:
The mounting structure allows for dynamic adjustment and accommodation of thermal expansion and mechanical loads. The notched mounting provides a flexible connection that can adapt to dimensional changes caused by temperature variations and operational loads, maintaining alignment without creating excessive mechanical constraints.
Solution Approach 2:
The design incorporates mounting features that can accommodate changes in dimensional parameters due to temperature and load. The notches and pegs are designed with appropriate tolerances and geometries that allow the assembly to maintain precision while adapting to parameter changes during operation.
3Ease of manufacture
If traditional mounting methods are used, then assembly clearances exist due to manufacturing tolerances, but the guiding precision is impaired by the resulting offset
Solution Approach 1:
The mounting structure uses asymmetric notches and pegs positioned at specific locations to compensate for manufacturing tolerances. The notches are strategically positioned to receive the pegs in a way that minimizes the effect of tolerance accumulation, creating a preferred alignment that reduces offset despite the presence of assembly clearances.
Data Source
AI summary
A magnetic bearing module (1) having a position sensor (2) and a magnetic bearing (3) is disclosed. One of a connection face (5, 6) of the position sensor (2) and a connection face (9) of the magnetic bearing (3) is provided with three pegs (22, 23, 24). Each peg has a shape exhibiting symmetry of revolution of which the axis (L22, L23, L24) is parallel to the axis (L1) of the module (1). The angular spacing between the first peg (22) and the second peg (23) is 90°. The angular spacing between the second peg (23) and the third peg (24) is 90°. The other of the connection face (5, 6) of the position sensor (2) and the connection face (9) of the magnetic bearing (3) has three accommodating notches (32, 33, 34) inside each of which is mounted one of the three pegs (22, 23, 24).