Leaf Spring Damper for Turbine Engine Fuel Spray Bar
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Solution Overview
Problem
Gas turbine engine spray bar assemblies experience reduced fuel delivery performance due to engine vibrations, necessitating a solution to dampen these vibrations.
Innovation Solution
A leaf spring damper system is integrated into the fuel delivery system of the gas turbine engine, comprising a stack of leaf springs with a base segment and two contact segments that engage the spray bar assembly and mounting platform, providing a spaced relationship to dampen vibrations through spring preload and frictional sliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the spray bar assembly is rigidly mounted to the mounting platform, then structural stability is improved, but vibration damping is worsened
Solution Approach 1:
The patent employs a leaf spring damper constructed from multiple layered leaf springs that provide flexible vibration damping while maintaining structural stability. The leaf springs act as a flexible element between the rigid mounting platform and the spray bar assembly, absorbing vibrations through elastic deformation of the leaf spring material.
Solution Approach 2:
The leaf spring damper is pre-installed between the mounting platform and the spray bar assembly to provide beforehand cushioning against engine vibrations. The damper is positioned in advance to intercept and dampen vibrations before they can adversely affect the spray bar assembly's fuel delivery performance.
2Object-affected harmful factors
If a vibration damping device is added to the spray bar assembly, then vibration damping is improved, but device complexity is worsened
Solution Approach 1:
The leaf spring damper merges multiple functions into a single integrated component: it provides vibration damping, structural support, and mechanical coupling between the mounting platform and spray bar assembly. By combining these functions into one element, the patent avoids adding separate complex vibration isolation systems.
Solution Approach 2:
The leaf spring damper is a passive, self-service vibration damping device that automatically absorbs vibrations through its elastic leaf spring structure without requiring external power sources, control systems, or active adjustment mechanisms. The damper self-regulates its damping characteristics based on the vibration inputs from the engine.
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 leaf spring damper effectively reduces vibrations within the spray bar assembly, enhancing fuel delivery performance by maintaining engagement and stability during engine operation.
Implementation Method 1
a leaf spring damper with a stack of a plurality of leaf springs
Implementation Method 2
The leaf spring damper effectively reduces vibrations within the spray bar assembly
Implementation Method 3
providing a spaced relationship to dampen vibrations through spring preload and frictional sliding
Data Source
AI summary
A turbine engine fuel delivery system includes a mounting platform, a spray bar assembly and a leaf spring damper with a stack of a plurality of leaf springs. The stack includes a base segment connected longitudinally between a first spray bar contact segment and a second spray bar contact segment. The base segment is connected to the mounting platform and is located a first distance from the spray bar assembly. The first spray bar contact segment engages the spray bar assembly and is located a second distance from the mounting platform. The second spray bar contact segment engages the spray bar assembly and is located a third distance from the mounting platform.