Turbomachine Injector Purge Device Pressure-Regulated Blocking System
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Solution Overview
Problem
Turbomachine injectors are sensitive to fuel deterioration due to coking, leading to flow perturbations and mechanical issues, affecting combustion quality and increasing pollution and unavailability risks, with existing purge devices being bulky, complex, and prone to breakdowns.
Innovation Solution
A compact, polyvalent device with a duct and blocking system that regulates fuel and purge air passage using distinct pressure levels, allowing fuel passage at a first pressure and purge air passage at a higher pressure, utilizing elastic modules and movable heads to manage fluid flow efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate circuits with check valves are used for fuel supply and purge air supply, then the injector can be protected from coking and purge function is achieved, but the device becomes bulky and complex with increased breakdown risks
Solution Approach 1:
The patent combines the fuel supply circuit and purge air supply circuit into a single integrated circuit. The blocking system performs dual functions: it acts as a check valve for fuel supply (allowing fuel flow in one direction) and as a pressure-regulated valve for purge air supply (allowing reverse flow only when purge air pressure exceeds fuel pressure). This merging eliminates the need for separate circuits and multiple check valves, directly resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The blocking system is designed as a universal component that performs multiple functions: it blocks reverse fuel flow, regulates fuel pressure, and enables purge air flow when needed. By making the blocking system multi-functional, the patent eliminates the need for separate dedicated components for each function, thereby reducing overall device complexity while maintaining the reliability of coking protection.
2Adaptability or versatility
If multiple supply circuits with electrical control valves are used for fuel and purge air regulation, then fuel supply can be regulated according to fuel pressure, but the device becomes bulky and complex
Solution Approach 1:
The patent merges the fuel supply regulation function and purge air regulation function into a single blocking system. The blocking system's movable blocking element responds to pressure differences between fuel and purge air, automatically regulating flow without requiring separate electrical control valves. This integration maintains adaptability while eliminating the complexity of multiple regulated circuits.
Solution Approach 2:
The blocking system operates autonomously based on pressure differential between fuel supply and purge air supply. The movable blocking element automatically positions itself to allow or block flow based on which pressure is higher, eliminating the need for external electrical control systems. This self-regulating mechanism provides the necessary adaptability without adding device complexity.
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 provides a simple, effective, and complete purge mechanism, reducing the risk of breakdowns and improving combustion quality by using a single duct for both fuel supply and purge air management, enhancing the reliability and efficiency of turbomachine injectors.
Implementation Method 1
a first head (7) mounted on a first elastic module (8), said first head (7) being capable of displacing to allow the passage of the fuel from the first opening (3) toward the second opening (4) based on the first pressure (P1)
Implementation Method 2
a second head (9) mounted on a second elastic module (10), said second elastic module (10) being capable of moving to allow the passage of air from the second opening (4) toward the first opening (3) based on the second pressure (P2)
Data Source
AI summary
A device for a turbomachine chamber injector, including a conduit having at least a first opening, and a second opening (4), a blocking system for blocking the conduit, making it possible to regulate the passage of fluids into the conduit, the blocking system being configured to allow fuel to flow from the first opening to the second opening only from a first pressure of the fuel, for the passage of a supply of fuel, and allow air to flow from the second opening to the first opening only from a second pressure of the air, for the passage of purge air, the second pressure being greater than the first pressure.