Flange Displacement Estimation Using 3D Coordinate Data
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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 finite element models from the open state to the fastened state.
Innovation Solution
A method that involves receiving measured three-dimensional coordinate data from the flange surfaces in an open state, determining effective coordinate data at specific positions, changing these coordinates to coincide, estimating a contact position, and calculating displacement amounts without simulating the deformation of the casings using finite element models, thereby reducing the calculation load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If finite element models are simulated from open state to fastened state to estimate flange displacement amounts, then the estimation accuracy is improved, but the calculation load increases and preparation period is prolonged
Solution Approach 1:
The patent segments the complex finite element simulation process into distinct measurement phases: acquiring open-state coordinates, acquiring fastened-state coordinates, and calculating displacement amounts. This segmentation allows the use of simplified coordinate measurement and calculation methods instead of full finite element simulation, thereby reducing calculation load and preparation time while maintaining estimation accuracy.
Solution Approach 2:
The patent uses coordinate data as a simplified copy or representation of the actual flange surface geometry. Instead of performing complex finite element simulations on the complete 3D models, the invention extracts and processes only the necessary coordinate information from flange surfaces, creating a lightweight digital representation that enables rapid displacement calculation without the computational burden of full simulation.
2Measurement precision
If finite element models are simulated from open state to fastened state to estimate flange displacement amounts, then the estimation accuracy is improved, but the costs increase
Solution Approach 1:
The patent segments the complex finite element simulation process into distinct measurement phases: acquiring open-state coordinates, acquiring fastened-state coordinates, and calculating displacement amounts. This segmentation allows the use of simplified coordinate measurement and calculation methods instead of full finite element simulation, thereby reducing calculation load and preparation time while maintaining estimation accuracy.
Solution Approach 2:
The patent uses coordinate data as a simplified copy or representation of the actual flange surface geometry. Instead of performing complex finite element simulations on the complete 3D models, the invention extracts and processes only the necessary coordinate information from flange surfaces, creating a lightweight digital representation that enables rapid displacement calculation without the computational burden of full simulation.
3Stability of the object's composition
If the casing changes from open state to fastened state, then the flange surfaces are deformed, but the gap between rotor and stationary component may become out of tolerance
Solution Approach 1:
The patent applies preliminary action by measuring and recording the coordinates of flange surfaces in both open and fastened states before final assembly. By obtaining coordinate data in advance and calculating displacement amounts, the invention enables prediction and compensation of deformation effects, allowing operators to adjust assembly parameters proactively to ensure the radial gap remains within tolerance range.
Solution Approach 2:
The patent implements feedback by using the calculated displacement amounts to inform and adjust the assembly process. The measured coordinate data and computed displacements provide real-time feedback on how the flange surfaces deform during fastening, enabling operators to make informed adjustments to ensure the final radial gap between rotor and stationary component remains within specified tolerance limits.
Data Source
AI summary
In a method for estimating a flange displacement amount, effective three-dimensional coordinate data at a lower first position on a surface continuous with a lower flange surface of a first supported portion, a lower target midpoint position on the lower flange surface, an upper first position that is coincident with the lower first position in the horizontal direction on a surface continuous with an upper flange surface, and an upper target midpoint position on the upper flange surface are determined. The effective three-dimensional coordinate data at the respective positions 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. A midpoint position in the vertical direction between the lower target midpoint position and the upper target midpoint position after the coordinate change is used as a target contact position.