The embodiment of the invention provides an aero-engine
borescope plug
assembly structure, and relates to the field of aero-engines. The
borescope plug
assembly aims to solve the problems that a
borescope plug
assembly cannot overcome deformation and incoordination of an inner casing and an outer casing at the same time, and the high-temperature
thermal cycle working condition exists. Comprising an inner plug, an outer plug, a check ring and a plugging piece, an inner plugging sealing part at the lower end of the inner plug is used for being connected with an inner-layer casing hole inspection hole mounting seat, and an inner plugging mounting part at the upper end of the inner plug is assembled in an outer-layer casing hole inspection hole mounting seat; an outer plug sealing part at the lower end of the outer plug is connected with the outer-layer casing hole inspection hole mounting seat; the check ring is arranged between the upper end inner plug mounting part and the upper end outer plug mounting part in a sleeving manner; and the plugging piece is connected with the upper end inner plug mounting part. By adopting a separated
rigid structure and clearance fit, the problem of failure of the borescope plug assembly caused by failure after a plurality of high-temperature
thermal cycle working conditions is avoided, and the defect that a rigid plug cannot adapt to the borescope plug assembly caused by inconsistent deformation of an inner casing and an outer casing is overcome.