Combustion Chamber Guide Device Floating Ring Groove
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Solution Overview
Problem
The existing guiding devices for spark plugs and fuel injectors in turbomachines face issues with weld beads protruding into the annular guide groove, restricting transverse movement and risking jamming or damage due to the delicate nature of the welding operation.
Innovation Solution
A guiding device with a floating ring and coaxial flange, where an intermediate space is reserved between the welds or brazes and the trajectory of the ring's rim, allowing welds or brazes to overflow into this space, thus avoiding obstruction of the ring's movement, achieved by creating a stepped cup with a shoulder and elongated fallen edge to direct overflow outside the preferred direction of movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If weld beads are used to join the cup and flange, then the structural strength is improved, but the weld beads may protrude into the guide groove and block the ring's movement
Solution Approach 1:
The guide groove is segmented into two functional zones: a first portion for normal transverse movement and a second portion serving as a overflow zone for weld beads. This segmentation allows the groove to simultaneously accommodate ring movement and weld material without interference.
Solution Approach 2:
The harmful effect of weld bead protrusion is extracted and isolated into a dedicated overflow zone (second portion of the groove), separating it from the functional movement area (first portion of the groove). This extracts the problem from the critical path of ring operation.
2Manufacturing precision
If the welding operation is performed with maximum care, then the joint quality is improved, but controlling weld overflow remains difficult and risky
Solution Approach 1:
The groove geometry is pre-designed with a dedicated overflow zone before welding occurs. This preliminary structural preparation ensures that even if weld overflow occurs during the welding process, it will be directed into the predetermined safe zone rather than blocking the movement groove.
Solution Approach 2:
The potentially harmful weld overflow is converted into a beneficial feature by designing the second portion of the groove to specifically receive and contain the overflow. What was previously a defect (weld bead protrusion) becomes an expected and accommodated feature of the design.
3Adaptability or versatility
If the ring is constrained to move only in the preferred transverse direction, then the guiding function is improved, but any weld protrusion into the groove can cause jamming
Solution Approach 1:
The groove cross-section is designed with asymmetric dimensions: a first dimension (depth) sufficient for ring movement and a second dimension (width) providing overflow capacity. This dimensional differentiation allows the groove to fulfill multiple functions simultaneously without compromise.
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 solution ensures smooth transverse movement of the ring within the flange groove, preventing jamming and damage, while maintaining a compact design that is simple and cost-effective.
Implementation Method 1
the bushing is brazed or welded with a cup, so as to define, between them, said groove
Implementation Method 2
the bushing is brazed or welded with a cup
Data Source
AI summary
The present disclosure provides devices for guiding an element in a combustion chamber wall opening. Between the welds or brazes joining a bushing with a cup and the trajectory of the ring edge, an intermediate space is reserved in an internal annular groove for said welds or brazes to protrude into, so that said welds or brazes lie outside the trajectory of the ring edge.