Conical surface centering structure and assembly method

Abstract

The invention discloses a conical surface centering structure and an assembly method. The conical surface centering structure comprises an inner rotating shaft, wherein an outer rotating shaft is coaxially arranged outside the inner rotating shaft; an annular limiting shaft shoulder is arranged on the outer circle of the first end of the inner rotating shaft; the outer circle of the second end ofthe inner rotating shaft is provided with external threads; a first limiting ring is arranged on the outer circle of the first end of the inner rotating shaft; the first limiting ring is arranged at the inner side of the limiting shaft shoulder, and the end the first limiting ring abuts against the limiting shaft shoulder; the outer ring surface of the first limiting ring fits with the conical surface of the inner peripheral wall of the outer rotating shaft; a second limiting ring is arranged on the outer circle of the second end of the inner rotating shaft; the outer ring surface of the second limiting ring fits with the conical surface of the inner peripheral wall of the outer rotating shaft; the fitting direction of the outer ring surface of the second limiting ring and the conical surface of the inner peripheral wall of the outer rotating shaft is opposite to the fitting direction of the outer ring surface of the first limiting ring and the conical surface of the inner peripheral wall of the outer rotating shaft; a locking nut in threaded connection with the screw threads is arranged on the outer circle of the second end of the inner rotating shaft; and the end of the locking nut abuts against the end of the second limiting ring.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a conical surface centering structure. Furthermore, the invention also relates to an assembly method for assembling the conical surface centering structure. Background technique [0002] At present, the aero-engine rotor system widely uses the assembly method of cylindrical surface centering and shaft shoulder axial limit, such as figure 1 As shown, it is used to ensure the reliable connection between the parts of the rotor system. Due to the high ambient temperature of the engine rotor and the large temperature gradient, there is a problem of thermal deformation mismatch between related parts. During the working process of the engine, the radial gap at the centering surface of the cylinder is too large, which in turn causes large vibration of the rotor and serious Sometimes it will cause the engine to rotate, the stator to scrape and grind, induce the engine to stop, and eventually...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a conical surface centering structure and an assembly method to solve the technical problems of large radial thermal deformation at the centering surface when the cylindrical surface is used for centering, resulting in gaps that easily cause large vibration of the rotor and difficult assembly and disassembly

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