Turbine Swirler Mounting Strap Axial Restraint
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Solution Overview
Problem
The existing swirler configurations in turbine engines are difficult, time-consuming, and expensive to remove or replace due to their fixed bonding to the combustor bulkhead, necessitating an improved mounting method for swirler assemblies.
Innovation Solution
A swirler assembly for a turbine engine that includes a mounting strap with an intermediate portion axially restraining a mounting lug, allowing for secure attachment to the combustor bulkhead while enabling easy removal and featuring anti-rotation and cooling apertures to prevent swirler rotation and maintain thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the swirler is fixedly bonded (e.g., brazed) to the combustor bulkhead, then the swirler is securely attached, but it becomes difficult, time consuming and expensive to remove or replace
Solution Approach 1:
The mounting system is divided into separate components: a mounting plate attached to the bulkhead, a mounting strap with mounting lugs on the swirler, and fasteners. This segmentation allows the swirler to be securely attached during operation while enabling easy removal and replacement by simply undoing the fasteners, eliminating the need for difficult brazing or bonding processes.
2Strength
If the swirler is fixedly bonded to the combustor bulkhead, then secure attachment is achieved, but maintenance accessibility is reduced
Solution Approach 1:
The mounting system transitions from a static permanent bond to a dynamic removable connection using fasteners. This allows the swirler to be quickly installed or removed for maintenance by simply tightening or loosening fasteners, dramatically reducing maintenance time while maintaining secure attachment during engine operation.
3Strength
If the swirler is fixedly bonded to the combustor bulkhead, then structural integrity is maintained, but replacement cost increases
Solution Approach 1:
By segmenting the mounting system into removable components with standardized fasteners, the swirler can be easily replaced without expensive brazing or bonding operations. This reduces replacement costs while maintaining structural integrity through properly designed mounting plates, straps, and fastener connections.
Data Source
AI summary
An assembly for a turbine engine includes a combustor bulkhead, a swirler and a mounting strap. The swirler includes a mounting lug and a tubular swirler body that extends along an axis. The mounting lug projects radially out from the swirler body. The mounting strap is attached to the combustor bulkhead. The mounting lug is axially restrained between the combustor bulkhead and the mounting strap.