Self-locking connection structure for annular casing and radial plate

Abstract

The invention provides a self-locking connection structure for an annular casing and a radial plate. The self-locking connection structure comprises the tapered annular casing, the radial plate with an end face, connection bolts, nuts and adjusting locking pieces, wherein the end face is matched with the taper; the radial plate is provided with first bolt holes perpendicular to the end face and second bolt holes which are perpendicular to the thickness direction of the radial plate and are communicated with the first bolt hole; the connection bolts penetrate through the annular casing and stretch into the bolt holes of the radial plate, the nuts are arranged in the second bolt holes and used for being matched with the connection bolts; and the adjusting locking pieces are arranged in the second bolt holes and used for supporting the nuts. The two sides of each adjusting locking piece are provided with elastic adjusting parts which are mutually symmetric, and the positions of the nuts supported by the adjusting locking pieces are adjusted by the elastic adjusting parts. By arranging the adjusting locking pieces for supporting the nuts, the axial directions of the nuts inserted intothe radial plate can be adjusted, accordingly, the problems can be avoided that the connection bolts are not perpendicular to the axes of the nuts, and the connection bolts are non-coaxial with the nuts, it is ensured that the connection bolts are only tensioned without bending, and the bolts are prevented from being bent during work.

Description

technical field [0001] The application belongs to the technical field of engine structure design, and in particular relates to a self-locking connection structure of an annular casing and a radial plate. Background technique [0002] The load-bearing casing of an aero-engine often adopts a structural form in which webs or pillars are connected with the outer ring casing. The outer ring casing is usually a cylindrical structure in the axial direction. Holes are drilled on the outer ring casing and threaded holes are drilled on the end surface of the web plate. Screws or bolts are screwed into the threaded holes on the web plate through the outer ring casing, thereby realizing the Fixation between outer ring casings. [0003] However, when the outer circle of the outer ring casing has a taper and is matched with the spoke plate on the taper surface, due to machining errors, there will inevitably be differences in the taper angle matching surfaces between the annular cone surf...

AI Technical Summary

Problems solved by technology

[0003] However, when the outer circle of the outer ring casing has a taper and is matched with the spoke plate on the taper surface, due to machining errors, there will inevitably be differences in the taper angle matching surfaces between the annular cone surface and the end face of the spoke plate, which easily leads to The bolts passing through the outer ring case are not perpendicular to the axis of the threaded holes of the web, and are not on the same axis. After the bolts are tightened, they are not only pulled, but also bent, which easily leads to failure of the bolts.

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