Rotor Unbalance Measurement Using a Movable Angle Sensor
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Solution Overview
Problem
Current methods for acquiring the unbalance of a rotor in balancing machines, particularly those with non-rigid connections, face challenges due to the influence of reference point mass changes and inaccuracies when adjusting or setting multiple reference points, leading to difficulties in precise angle alignment and potential misusage.
Innovation Solution
A method utilizing a single angle reference point on the rotor, where an angle sensor is positioned at two different angles relative to the rotor's rotating axis, allowing for vector calculation to decompose and measure the unbalance of the rotor and balancing machine, ensuring precise and accurate unbalance determination without changing the unbalance amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple angle reference points are set on the rotor, then measurement coverage is improved, but measurement precision deteriorates due to misusage and difficulty in achieving precise angle adjustments
Solution Approach 1:
The patent extracts the angle reference function from multiple physical reference points on the rotor and consolidates it into a single reference point combined with a programmable angle sensor system. The angle sensor can be positioned at different locations and configured to reference the single point, eliminating the need for multiple physical reference points while maintaining measurement coverage.
Solution Approach 2:
The patent changes the parameter of angle reference from fixed physical locations to a programmable configuration. The angle sensor's reference angle can be adjusted through software settings rather than requiring physical repositioning or multiple reference marks, enabling precise angle measurements without the limitations of manual positioning.
2Ease of manufacture
If angle reference point material with mass is used, then angle reference is established, but rotor unbalance is influenced
Solution Approach 1:
The patent extracts the angle reference function from physical mass elements and transfers it to an optical/electronic sensing system. The angle reference is now defined by the position of a single reference point and the angular position of the angle sensor, eliminating the need for additional mass on the rotor that would create unbalance.
Solution Approach 2:
The patent replaces the mechanical approach of using massed reference points with an optical/electronic angle sensing system. The angle reference is established through the angular position detection system rather than through physical mass elements, thereby eliminating the harmful mechanical unbalance while maintaining the angle reference function.
3Adaptability or versatility
If angle reference point is changed during measuring process, then unbalance measurement can be adjusted, but operation complexity increases and accuracy decreases
Solution Approach 1:
The patent enables the system to automatically adjust angle references through programmable configuration rather than requiring manual intervention. The angle sensor can be programmed to reference different angles or positions automatically, allowing the system to adapt to different measurement requirements without increasing operational complexity.
Solution Approach 2:
The patent allows angle reference parameters to be changed through software configuration rather than physical adjustment. This enables flexible adaptation of unbalance measurements while maintaining operational simplicity, as the changes are made through programmable parameters rather than manual repositioning or adjustment procedures.
Data Source
AI summary
Provided is a method to acquire the unbalance of a rotor and a balancing machine, in which, the method to acquire the unbalance of a rotor includes the following procedures: install angle sensor at first position on balancing machine, measure the unbalance of rotor, first unbalance in measuring plane 1 and first unbalance in measuring plane 2 can be measured. Move angle sensor on balancing machine from first position to second position, measure the unbalance of the rotor again, second unbalance in measuring plane 1 and second unbalance in measuring plane 2 can be measured. In the above mentioned two measurements, the unbalance amount of rotor has no change, but the unbalance angle relative to angle reference point on rotor is changed by an angle which equals the angle of the sensor being moved.