Pressure Regulating Valve Angled Bucket Design
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Solution Overview
Problem
In fuel flow control systems for gas turbines, maintaining consistent pressure within the fuel control housing is challenging due to unpredictable valve operation, which affects the fuel system's reliability and accuracy.
Innovation Solution
A pressure regulating valve assembly with a bi-directional spool and sleeve configuration, featuring angled buckets and an outlet surface, is used to control fuel flow, ensuring consistent pressure regulation by aligning with specific window sets and maintaining a precise diametral clearance, coupled with a resilient member to manage spring load forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a displacement pump is sized to ensure excess flow capacity at all operating conditions, then the fuel system can handle all possible operating conditions, but the pump becomes larger and more complex than necessary
Solution Approach 1:
The patent employs dynamic pressure regulation through a spring-loaded valve mechanism that automatically adjusts fuel flow based on system pressure conditions. The spring force varies with compression, creating a dynamic equilibrium that adapts the pump's effective capacity to actual operating conditions without requiring physical reconfiguration or oversized components for all possible scenarios.
2Stress or pressure
If multiple control valves are used to control and maintain pressures within the fuel control housing, then pressure control capability is improved, but the valve system becomes more complex and less reliable
Solution Approach 1:
The patent combines multiple pressure control functions into a single integrated valve assembly. The spring-loaded valve incorporates both pressure sensing and flow regulation functions in one component, eliminating the need for separate control valves. This unified approach maintains comprehensive pressure control capability while reducing the number of parts and potential failure points in the system.
3Productivity
If traditional pressure regulating valves are used, then the fuel system can operate, but inconsistent valve operation leads to unpredictable fuel system performance
Solution Approach 1:
The spring-loaded valve mechanism provides continuous mechanical feedback between system pressure and valve position. As pressure increases, the force on the valve seat increases, automatically reducing flow to maintain equilibrium. This inherent feedback loop ensures consistent, predictable operation without requiring external control systems or complex electronic components.
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 configuration stabilizes fuel flow and pressure regulation, ensuring system accuracy and reliability by bypassing excess flow and maintaining constant pressure across the metering valve section, enhancing the predictability and efficiency of the fuel control system.
Implementation Method 1
coupling a resilient member to the pressure regulating valve spool in the pressure regulating valve section of the fuel control housing, where the resilient member forces the limiting lip of the pressure regulating valve spool into contact with the limiting lip of the pressure regulating valve sleeve
Data Source
AI summary
A pressure regulating valve assembly includes a pressure regulating valve sleeve and a pressure regulating valve spool. The pressure regulating valve sleeve includes a first window set and a second window set. The pressure regulating valve spool includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion formed between the first and second cylindrical portions. The pressure regulating valve spool also includes an angled bucket formed on the first cylindrical portion having a high gain portion of a first width, a low gain portion of a second width, and a ratio of the first width to the second width between 1.44 and 1.47. The pressure regulating valve spool further includes an angled outlet surface. The angled bucket is configured to align with the first window set and the angled outlet surface is configured to align with the second window set.