Outer ring case and spoke plate connecting structure

Abstract

The invention belongs to the technical field of aero-engine design, and particularly relates to an outer ring case and spoke plate connecting structure. The connecting structure comprises an outer ring case, which is provided with a matching platform and first bolt holes; a spoke plate, wherein second bolt holes are formed in the end face of the spoke plate, and nut mounting holes are formed in the plate face of the spoke plate; bolts; nuts, wherein each nut comprises a nut head and a step, and arc matching surfaces are arranged at the two sides of each nut head; and locking sheets, wherein each locking sheet comprises a bottom plate, side plates, top plates and limiting plates, a first through hole is formed in each bottom plate, and a second through hole is formed by the positions, closeto each other, of every two corresponding top plates. According to the outer ring case and spoke plate connecting structure, each nut can rotate around the axis of the corresponding nut mounting holeso as to adjust the direction of the threaded hole, it is guaranteed that the bolts are only pulled without being bent, and the safety and reliability of connection are enhanced; besides, when a thread is damaged, the corresponding nut can be replaced without replacing the spoke plate, so that the cost is saved; and furthermore, the nuts can be limited at proper positions in a narrow space whicha tool cannot reach, and the direction of the nuts can be slightly adjusted.

Description

technical field [0001] The application belongs to the technical field of aero-engine design, and in particular relates to a connection structure between an outer ring casing and a radial plate. Background technique [0002] The load-bearing casing of an aero-engine is often used to connect the spoke plate, the pillar and the outer ring casing. The axial direction of the outer ring casing is a cylinder. Holes are drilled on the outer ring casing, and threaded holes are drilled on the end surface of the spoke plate. The screws pass through the outer ring casing and screw into the threaded holes on the spoke plate, so as to realize the fixed between. [0003] When the outer circular casing of the outer ring has a taper in the axial direction and needs to be matched with the radial plate, due to machining errors, the taper angle of the annular surface and the conical angle of the end face of the radial plate will inevitably be different, which will lead to outer The plane on t...

AI Technical Summary

Problems solved by technology

[0003] When the outer circular shaft of the outer ring casing has a taper and needs to be matched with the radial plate, due to processing errors, the taper angle of the annular surface and the conical angle of the end face of the radial plate will inevitably be different, which will lead to outer The plane on the ring casing that fits the bolt head is not perpendicular to the axis of the threaded hole of the web, and is not on the same axis. After the bolt is tightened, it is not only pulled but also bent, which may easily lead to the failure of the bolt

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