Turbomachine Stator Sector Arrangement Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for arranging sectors in a turbomachine distributor lack optimization due to geometric differences between sectors, leading to asymmetries and reduced performance, as the quality of relative positioning is not evaluated, resulting in vibrations and sub-optimal yield.
Innovation Solution
A method that uses a database of three-dimensional digital models of sectors to optimize the choice and positioning of sectors, allowing for precise measurement and virtual assembly, enabling the determination of optimal passage sections and arrangement, which is achieved through digitization using non-contact optical means and automated processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sectors are assembled without optimization of arrangement, then assembly process is simple, but geometric defects and asymmetries occur leading to vibrations and reduced service life
Solution Approach 1:
The patent applies preliminary action by creating a three-dimensional digital model of each sector before assembly and pre-determining the optimal arrangement of sectors in the distributor. This allows the optimal configuration to be established in advance, avoiding geometric defects and asymmetries before they occur during actual assembly, thereby improving reliability without adding complexity to the physical assembly process.
Solution Approach 2:
The patent uses copying by creating accurate three-dimensional digital models (copies) of each physical sector. These digital copies allow for virtual assembly and optimization of sector arrangements without affecting the actual sectors. The digital models capture all geometric characteristics, enabling optimal arrangement determination while keeping the physical assembly process simple.
2Productivity
If traditional assembly methods are used, then assembly process is fast, but relative positioning quality between sectors is not evaluated leading to sub-optimal yield
Solution Approach 1:
The patent replaces mechanical measurement and evaluation methods with a digital information-based system. Instead of using physical measurement tools to evaluate relative positioning quality, the system uses three-dimensional digital models and computational methods to precisely determine and evaluate the positioning of sectors. This substitution enables high-precision measurement and evaluation without slowing down the assembly process.
Solution Approach 2:
The patent introduces an intermediary - the three-dimensional digital model - between the physical sectors and the evaluation process. This digital intermediary captures all geometric information and allows for precise evaluation of relative positioning quality without requiring direct physical measurement during assembly, thus maintaining productivity while improving measurement precision.
3Reliability
If geometric differences between sectors are not measured, then measurement process is simple, but asymmetries occur that are detrimental to service life and generate vibrations
Solution Approach 1:
The patent creates three-dimensional digital models (copies) of each sector that capture all geometric characteristics, including subtle differences that are difficult to measure with traditional methods. These digital copies enable comprehensive measurement and comparison of geometric differences without requiring complex physical measurement procedures, thus improving reliability while keeping the measurement process manageable.
Solution Approach 2:
The patent transitions from traditional two-dimensional or limited three-dimensional measurement to comprehensive three-dimensional digital modeling. This dimensional approach allows for complete capture and analysis of all geometric characteristics of sectors, making it easier to detect and measure subtle geometric differences that would be difficult or impossible to detect with conventional measurement methods.
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
This approach enhances the performance and service life of the distributor by ensuring precise geometric alignment and measurement, reducing labor errors, and improving reproducibility, ultimately leading to better precision and increased efficiency.
Implementation Method 1
by optical means using a laser scanner or with structured light projection for example
Data Source
Figure 1
Figure 2~4
AI summary
The method involves creating a database of three-dimensional numerical models of a valve sector (100) and lateral valve sectors (200, 300), by digitizing. A criterion to select an arrangement of the sectors is set, and a desired value for the criterion is set. Relative positions of the sectors are determined, for various evaluated arrangements, when the sectors are assembled together. A value of the criterion for the arrangement under evaluation, is determined according to the positions. The arrangement, in which the criterion has the value closest to the desired value, is retained. The criterion is a function of the shapes and the relative positions of the sectors.