Attachment assembly and gas turbine engine with attachment assembly

An attachment assembly for attaching a center structure to an outer structure at least partially circumscribing the center structure, the attachment assembly comprising:

• a bushing provided within the center structure or the outer structure, the bushing defining a first through passage;
• a bushing adapter slidably mounted within the first through passage and defining a second through passage;
• a threaded passage provided on the other of the center structure or the outer structure;
• and
• a bolt having a head and a shank with a threaded portion wherein the bolt passes through the first through passage and the second through passage, with the head abutting the bushing adapter and the threaded portion threaded into the threaded passage;
• wherein the bushing adapter has an annular shoulder with a rounded surface that enables a swivel joint between the bushing and the bushing adapter.

An attachment assembly for attaching a center structure to an outer structure at least partially circumscribing the center structure, the attachment assembly comprising:

• a bushing provided within the center structure or the outer structure, the bushing defining a first through passage;
• a bushing adapter slidably mounted within the first through passage and defining a second through passage;
• a threaded passage provided on the other of the center structure or the outer structure;
• and
• a bolt having a head and a shank with a threaded portion wherein the bolt passes through the first through passage and the second through passage, with the head abutting the bushing adapter and the threaded portion threaded into the threaded passage;
• wherein an upper portion of the bushing adapter is eccentric and enables adjustment of an axial position of the center structure.

A gas turbine engine, comprising:

• a centerbody;
• a support structure circumscribing the centerbody;
• and
• an attachment assembly for operably coupling the centerbody to the support structure and configured to allow a cooling air flow to the centerbody, comprising:
• a bushing provided on the centerbody or the support structure, the bushing defining a first through passage;
• a bushing adapter slidably mounted within the first through passage and defining a second through passage;
• a threaded passage provided on the other of the centerbody or the support structure;
• and
• a bolt having a head and a shank with a threaded portion wherein the bolt passes through the first through passage and the second through passage, with the head abutting the bushing adapter and the threaded portion threaded into the threaded passage;
• wherein the bushing adapter is able to move along the length of the first through passage after the attachment assembly is fully assembled.