Estimating Flange Displacement in Rotary Machines
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Solution Overview
Problem
The existing method for estimating flange displacement amounts in rotary machines requires a high calculation load, leading to a prolonged preparation period and increased costs due to the simulation of the fastened state using finite element models of the open state.
Innovation Solution
A method that involves measuring three-dimensional coordinate data on the flange surfaces in the open state, determining effective coordinate data at specific positions, and calculating displacement amounts without simulating deformation using finite element models, reducing the calculation load by focusing on key positional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If finite element models are used to simulate the fastened state from the open state, then the displacement amounts of flange surfaces can be estimated, but the calculation load becomes large and the preparation period is prolonged
Solution Approach 1:
The patent segments the complex finite element simulation process into a simplified measurement and calculation process. Instead of simulating the entire fastened state, it measures coordinate data at specific key positions on flange surfaces in the open state and calculates displacement amounts based on these measurements, significantly reducing computation time while maintaining accuracy
Solution Approach 2:
The patent performs preliminary measurement of coordinate data at key positions on the flange surfaces while the casing is in the open state. This preliminary action captures the necessary data before fastening, allowing displacement calculations to be made quickly without requiring time-consuming simulations of the fastened state
2Measurement precision
If finite element models are used to simulate the fastened state, then displacement amounts can be obtained, but the costs for estimation increase
Solution Approach 1:
The patent extracts only the essential information needed for displacement calculation by measuring coordinate data at specific key positions on the flange surfaces. This extraction approach eliminates the need for expensive and time-consuming finite element simulations while obtaining sufficient data for accurate displacement estimation
Solution Approach 2:
The patent replaces the expensive and complex finite element modeling process with a simple, low-cost measurement and calculation approach. By using basic coordinate measurement and mathematical calculation instead of sophisticated simulation software and computational resources, the estimation cost is dramatically reduced
Data Source
AI summary
A method for estimating a flange displacement amount includes determining effective three-dimensional coordinate data at a lower first position of a first supported portion on a surface continuous with a lower flange surface and at an upper first position coincident with the lower first position in a horizontal direction on a surface continuous with an upper flange surface. The effective three-dimensional coordinate data are changed such that the effective three-dimensional coordinate data at the lower first position and the effective three-dimensional coordinate data at the upper first position are coincident with each other. According to a difference between a position in a vertical direction indicated by the effective three-dimensional coordinate data at an upper target position and a position in the vertical direction indicated by the effective three-dimensional coordinate data at a lower target position, displacement amounts of the upper target position and the lower target position are obtained.