Rotating Part Balancing Scallop Design
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Solution Overview
Problem
Current balancing techniques for rotating parts often create stress concentrations and compromise structural integrity due to material removal, leading to potential failure from vibrations and imbalance.
Innovation Solution
A method of forming a balancing scallop within a rotating part by inspecting for imbalance, calculating dimensions, and using a material removal machine to create sections with gradually transitioning depths, minimizing stress concentrations and maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If material removal is used for balancing, then imbalance is corrected, but stress concentrations and structural weakening occur
Solution Approach 1:
The balancing scallop is formed with varying depth across different locations on the rotating part surface. The depth is maximum at the heavy spot and gradually decreases toward adjacent areas, creating localized material removal precisely where needed to correct imbalance while preserving structural integrity in other regions.
Solution Approach 2:
The balancing scallop has a curved, scallop-like shape with gradual transitions rather than sharp edges or abrupt material removal. This curved geometry distributes stress more evenly and eliminates stress concentration points that would occur with traditional drilling or machining methods.
2Reliability
If holes are drilled for balancing, then mass is removed, but stress concentration points are created
Solution Approach 1:
Instead of drilling holes that create stress concentration points, the invention extracts material in a controlled, gradual manner by forming a scallop shape on the surface. This removes the necessary mass for balancing while maintaining continuous material structure and avoiding the harmful stress concentrations associated with holes.
Solution Approach 2:
The scallop shape uses curved surfaces and gradual transitions instead of sharp corners or holes. This curvature distributes mechanical stresses evenly across the surface, eliminating the stress concentration points that would be created by drilled holes or abrupt material removal.
3Strength
If extra material is added for balancing ring or thicker flanges, then structural integrity is maintained, but manufacturing complexity increases
Solution Approach 1:
The balancing scallop is formed as an integral part of the rotating component during the manufacturing process itself, before the component is put into service. This preliminary material removal eliminates the need for separate balancing rings or thicker flanges, simplifying the overall design while maintaining structural integrity.
Solution Approach 2:
The balancing feature is merged directly into the rotating component's existing structure. Instead of adding separate balancing elements like rings or thicker flanges, the scallop is formed as part of the original component geometry, reducing design complexity and integration issues.
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 method allows for effective balancing without undue stress concentrations, maintaining structural integrity, and reducing manufacturing costs and cycle time, thus enhancing the longevity and efficiency of rotating parts.
Implementation Method 1
forming a balancing scallop within a rotating part by bringing the rotating part and a tool of a material removal machine into engagement
Data Source
AI summary
A method of forming a balancing scallop within a rotating part, including inspecting the rotating part for imbalance, calculating dimensions of the balancing scallop to be formed within the rotating part, positioning the rotating part relative to a material removal machine, starting the tool removal machine, bringing the rotating part and a tool of the material removal machine into engagement, forming a first section of the balancing scallop, forming a second section of the balancing scallop, forming a third section of the balancing scallop, and dis-engaging the rotating part and the tool of the material removal machine.