Fuel Nozzle with Detachable Cap for Burn Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel supply nozzles for turbine generators suffer from burn damage at the end portion due to high temperatures, requiring replacement of the entire nozzle, which is costly and time-consuming, and difficult to manage effectively.
Innovation Solution
A fuel supply nozzle design featuring a reduced thickness between the outer and inner peripheral walls at the end portion, with a nozzle cover that can be easily exchanged, utilizing screw threads, fasteners, or machined portions and grooves to minimize burn damage and facilitate replacement of only the damaged section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the end portion of the nozzle is damaged due to high temperature, the whole portion of the nozzle as well as the damaged end portion thereof is replaced, then the reliability of the system is maintained, but the loss of time and manufacturing cost increases significantly
Solution Approach 1:
The nozzle is divided into a main body and a detachable cap portion. The cap can be separated from the main body when damaged, allowing only the cap to be replaced rather than the entire nozzle. This segmentation enables selective replacement of the damaged portion, reducing replacement time and cost while maintaining system reliability.
Solution Approach 2:
The cap portion is designed with specific local characteristics including a low thickness section at its end portion that is more susceptible to burn damage, while the main body retains sufficient thickness for durability. This local quality differentiation allows the cap to sacrificially protect the main body, enabling cost-effective replacement of only the cap when damage occurs.
2Reliability
If the end portion of the nozzle is damaged due to high temperature, the whole portion of the nozzle as well as the damaged end portion thereof is replaced, then the system continues to operate safely, but the manufacturing cost increases
Solution Approach 1:
The nozzle is divided into a main body and a detachable cap portion. The cap can be separated from the main body when damaged, allowing only the cap to be replaced rather than the entire nozzle. This segmentation enables selective replacement of the damaged portion, reducing manufacturing cost while maintaining system safety.
Solution Approach 2:
The cap portion is designed as a sacrificial, replaceable component with lower material cost compared to the main body. When the cap suffers burn damage, it is replaced rather than the expensive main body, effectively using a cheaper component to protect a more valuable one.
3Reliability
If the end portion of the nozzle is damaged due to high temperature, the whole portion of the nozzle as well as the damaged end portion thereof is replaced, then the system maintains its function, but the labor cost increases
Solution Approach 1:
The nozzle is divided into a main body and a detachable cap portion connected by a thread structure. The cap can be easily unscrewed and replaced without complex procedures, significantly improving ease of repair compared to replacing the entire nozzle while maintaining functional integrity.
4Strength
If the thickness of the nozzle wall is increased to prevent burn damage, then the strength and heat resistance of the nozzle is improved, but the weight and material cost increase
Solution Approach 1:
The nozzle design features non-uniform wall thickness: the main body has sufficient thickness for strength and heat resistance, while the cap portion has reduced thickness at its end to enable sacrificial protection. This local quality differentiation maintains overall strength while reducing weight and material cost.
5Strength
If the thickness of the nozzle wall is increased to prevent burn damage, then the heat resistance of the nozzle is improved, but the material cost increases
Solution Approach 1:
The nozzle design features non-uniform wall thickness: the main body has sufficient thickness for heat resistance, while the cap portion has reduced thickness at its end to enable sacrificial protection. This local quality differentiation maintains heat resistance where needed while reducing material cost overall.
Solution Approach 2:
The cap portion is designed as a sacrificial component with lower material cost that can be replaced when damaged, protecting the more expensive main body. This approach reduces overall material cost while maintaining the heat resistance of the critical main body portion.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fuel supply nozzle (100) for injecting fuel into a combustor in a shape of a pipe having an outer peripheral wall (140) and an inner peripheral wall (130) extended from a route to a tip (10). The fuel supply nozzle (100) includes a first fuel discharge passage (30) formed at the inside of the inner peripheral wall (130) extending from the route to the tip (10), at least one or more vanes (31) disposed on the outer peripheral wall (140) spaced apart from the tip (10) by a given distance and having vane fuel outlets (32) communicating with the first fuel discharge passage (30), and a burning section formed on a given area adjacent to the tip (10) to allow a thickness between the outer peripheral wall (140) and the inner peripheral wall (130) to be lower than the other section thereof.