Thermally Insulating Ceramic Rods for Vane Handling Frames
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Solution Overview
Problem
The existing vane handling frames with yttrided zirconia coating detach and deposit on vanes during heat treatment, leading to mechanical conformity issues and vane scraping.
Innovation Solution
A vane handling frame with rods made from thermally insulating ceramic material, such as alumina, that supports vanes away from the frame's components, preventing contact and deposition of yttrided zirconia, and using a metal wire with ceramic tubes for structural integrity and thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic frame is used with yttrided zirconia coating to prevent eutectic formation, then the metallurgical qualities of vanes are protected, but the coating detaches during heat treatment and deposits on vanes causing mechanical conformity issues
Solution Approach 1:
The patent introduces an intermediary substance (molybdenum disulfide or graphite coating) between the metallic frame and the vane. This intermediary layer prevents direct contact and eutectic formation while avoiding the detachment and deposition problems of yttrided zirconia coating, thus maintaining both metallurgical protection and mechanical conformity
Solution Approach 2:
The patent changes the chemical composition and physical properties of the coating material from yttrided zirconia to molybdenum disulfide or graphite. These materials have different thermal stability and adhesion characteristics that prevent detachment during heat treatment while still providing the necessary protective function
2Object-affected harmful factors
If yttrided zirconia coating is applied to the frame to avoid eutectic formation, then contact between vane and metallic material is prevented, but the coating detaches after several heat treatments and deposits on vanes
Solution Approach 1:
The patent employs a coating system that is designed to remain stable throughout the service life of the frame. The molybdenum disulfide or graphite coating provides durable protection that does not detach during heat treatment cycles, eliminating the need for frequent frame recoating or replacement
Solution Approach 2:
The patent uses composite material structures where a metallic frame is combined with a stable, heat-resistant coating layer. The combination of metallic structural integrity with the thermal stability of molybdenum disulfide or graphite creates a durable composite system that maintains its protective function over extended periods
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 solution significantly increases vane conformity by avoiding yttrided zirconia deposition and ensuring mechanical strength and deformability during heat treatment, enhancing the vane's metallurgical qualities.
Implementation Method 1
rods for supporting and holding the vanes away from the bottom wall and from said longitudinal and transverse partitions, wherein said rods cross the longitudinal and transverse partitions and extend into the housings and are produced, at least externally, from a thermally insulating material
Data Source
AI summary
A framework for handling blades, comprising a bottom wall carrying a plurality of intermeshed longitudinal and transverse partitions forming a grid defining a plurality of housings each able to receive a blade. The framework comprises rods for supporting and holding the blades remote from the base wall and said longitudinal and transverse partitions, said rods crossing the longitudinal and transverse partitions and extending into the housings and being produced, at least externally, from a thermally insulating material.