Split Ring Spring Damper Asymmetry Gas Turbine Rotor
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Solution Overview
Problem
Conventional mechanical dampers for gas turbine engine components are inadequate in withstanding engine transportation loads and may dislocate, losing their damping effectiveness.
Innovation Solution
A spring damper with a split ring body featuring unevenly spaced end portions and an evenly spaced segment, which provides improved resistance to dislocation through preload forces and stress distribution, maintaining damping effectiveness under dynamic and static loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical dampers are used for gas turbine engine components, then damping function is provided, but resistance to transportation loads is insufficient causing dislocation
Solution Approach 1:
The split ring body employs asymmetric spacing between the gap and end portions, creating uneven distribution of material around the ring. This asymmetric geometry generates restoring forces that counteract dislocation during transportation while maintaining damping contact during operation
Solution Approach 2:
The damper is divided into multiple segments including the split ring body with gap and end portions. This segmentation allows independent optimization of each segment's function - the gap provides flexibility while the end portions provide structural strength and contact surfaces
2Device complexity
If the split ring body has evenly spaced end portions, then structural symmetry is achieved, but ability to resist dislocation under load is reduced
Solution Approach 1:
The patent deliberately introduces asymmetry by positioning the gap and end portions at non-uniform intervals around the split ring body. This asymmetric configuration creates inherent restoring forces that prevent dislocation during transportation while maintaining operational reliability
3Reliability
If preload forces are applied to spacing end portions radially inward, then resistance to dislocation is improved, but gap width is reduced
Solution Approach 1:
The damper is preloaded during assembly to establish initial contact between end portions and the rotor assembly. This preliminary action creates pre-compression forces that maintain end portion spacing during transportation while the asymmetric geometry ensures sufficient gap width remains for operational damping function
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 spring damper design enhances resistance to dislocation during transportation and maintains damping effectiveness by ensuring the end portions remain aligned and in contact, preventing loss of preload and reducing the risk of damage.
Implementation Method 1
Mechanical dampers function by absorbing vibrational energy through mechanical contact with the damped structure
Implementation Method 2
The spring damper design enhances resistance to dislocation during transportation and maintains damping effectiveness
Data Source
AI summary
A spring damper includes a split ring body. The split ring body defines a center and a circular gap separating opposed first and second end portions of the split ring body. The first and second end portions are connected by a split ring body segment that is evenly spaced from the center. At least one of the first and second end portions is unevenly spaced from the center in relation to the segment that is evenly spaced with respect to the center.