| 主权项 |
1. A joint assembly comprising:
a first gas turbine engine casing having a first flange and a second gas turbine engine casing having a second flange,
the first and second flanges extending parallel to each other,the first flange having a plurality of first apertures extending there-through,the second flange having a plurality of second apertures extending there-through, andthe second apertures in the second flange being aligned with the first apertures in the first flange; a plurality of bolts and a plurality of nuts, each bolt extending through a respective first aperture in the first flange and a respective second aperture in the second flange, and each nut being secured on a respective one of the bolts; and at least one collar,
the at least one collar being arranged around a shank of one of the bolts,the at least one collar being arranged between one of the flanges and the respective nut or between one of the flanges and a head of the respective bolt, andthe at least one collar comprising a first member and a second member,the second member being thicker than a mid portion of the first member,
the second member being arranged at a first end of the first member,the first member of the collar being annular,the second member having a first radially inner end, a second radially inner end and a radially outer mid portion,the second member between the first radially inner end and the second radially inner end being a unitary monolithic annular member and being substantially U-shaped or V-shaped in cross-section,the second member defining an axial space between the first radially inner end and the second radially inner end of the second member, andthe first member and the second member are structured such that, when a crushing load is applied, the first radially inner end abuts the second radially inner end before the first member is crushed. |
