A long strip blind cavity adjustment pad type part installation auxiliary device and method

By using an auxiliary device for installing shims in a long, narrow blind cavity, and by leveraging the linkage between the locating ring assembly clamp and the push rod tool, the problem of easy detachment of the front locating ring was solved, enabling efficient and safe aero-engine assembly and reducing costs and production cycle.

CN117484174BActive Publication Date: 2026-06-02AECC AVIATION POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AECC AVIATION POWER CO LTD
Filing Date
2023-12-12
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

During the assembly of low-pressure turbines for aero engines, the front locating ring is prone to falling off, resulting in low assembly efficiency, high costs, and the risk of parts being bumped or knocked off.

Method used

An auxiliary device for installing elongated blind cavity adjustment pads is adopted, including a positioning ring assembly clamp and a push rod tool. Through the linkage of push rod, support rod, pull head, slider, positioning disc and chuck connecting arm, the positioning ring in front of the shaft is clamped and fixed, and liquid nitrogen freezing is used to reduce the assembly difficulty.

Benefits of technology

It effectively prevents the front locating ring from falling off during installation, improves assembly efficiency, reduces production cycle and cost, and ensures the accuracy and safety of parts installation.

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Abstract

This invention relates to the field of aero-engine assembly technology, and in particular to an auxiliary device and method for installing elongated blind cavity adjustment pads, including a positioning ring assembly clamp and a push rod fixture. The positioning ring assembly clamp is used to clamp and insert the front positioning ring into the elongated blind cavity. By setting push rods, support rods, pull heads, sliders, positioning discs, several chuck connecting arms and chucks and their connection relationships in the positioning ring assembly clamp, the front positioning ring is clamped and fixed, preventing it from falling off during installation. The push rod fixture, through the setting of adapters, bushings and cones, achieves radial positioning of the low-pressure turbine shaft with the front positioning ring and the front end of the fan journal, thus installing the low-pressure turbine shaft in place. This device has an ingenious structural design, is simple to operate, highly efficient, and low in cost. It effectively solves the problem of front positioning ring detachment during aero-engine assembly, while reducing engine assembly cycle, improving assembly efficiency, and reducing assembly costs.
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