Importance

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Abstract

An injection tube for connecting a plenum to a combustion chamber includes a first mouth having a longitudinal axis and adapted for insertion into a cold plenum port or other component and a second mouth having a longitudinal axis and adapted for insertion into a hot chamber port or other component. To accommodate flexural, axial and torsional forces caused by differential thermal expansion between the two components, the mouths of the tube are configured to have multiple degrees of freedom within each corresponding port while maintaining port-mouth seal integrity. In an illustrative embodiment, the first mouth outer surface shape allows free slip of the first mouth parallel to the first mouth longitudinal axis, as well as rotation of the first mouth about both the first mouth longitudinal axis and a first mouth outer surface transverse axis. Mounted on the outer surface of the tube is a rocker arm adapted to engage a pivot mounted on the chamber outer surface or to engage the chamber outer surface itself. The rocker engagement allows rotation of the second mouth about a second mouth transverse axis while constraining axial movement of the tube, thereby preventing the second mouth from disengaging the chamber port.

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First Claim