Bearing assembly method

Abstract

The invention relates to a bearing assembly method used for assembling a bearing without an inner ring on an intermediate case of an aircraft engine. The method includes the following steps: A, providing an assembly tool, sleeving a cylindrical portion with a bearing bush, enabling a boss to match and align with a first notch, rotationally connecting an ejector rod with a first pressure rod, and clamping the bearing with an ejector blade and a disc; B, after heating a case hole of the intermediate case or cooling the bearing, enabling a first projection to align with a case notch, and then assembling the bearing in place; disconnecting the ejector rod with the first pressure rod, taking out the ejector rod from the intermediate case, and then taking the first pressure rod out of the bearing; C, mounting a collar and a spiral retaining ring in sequence to finish assembling of the bearing. The bearing assembly method greatly improves assembly and disassembly efficiency and quality.

Description

technical field [0001] The invention relates to a processing method of an aero-engine part, in particular to a method for assembling a bearing on an aero-engine casing with angular limit requirements. Background technique [0002] figure 1 Shown is a schematic diagram of the assembly relationship decomposition structure of a bearing used in an aero-engine, see figure 1 As shown, a bearing 2 without an inner ring needs to be assembled on the intermediate case 1 of the aero-engine, and the bearing 2 is in interference fit with the case hole, and is fixed by a collar 3 and a spiral retaining ring 4 . Wherein, the left and right sides of the outer ring end face of the bearing 2 are symmetrically provided with bosses 21, and the bosses 21 are matched and aligned with the two collar notches 31 on the collar 3, and the lugs on the collar 3 32 is matched and aligned with the casing notch 12 on the intermediate casing 1, and the mutual assembly positions are unique. [0003] In th...

AI Technical Summary

Problems solved by technology

[0004] Due to marking errors and uneven assembly during assembly, the angular assembly position of the bearing 2 will deviate from the ideal state, and the collar notch 31 of the collar 3 is aligned with the bearing 2 After the boss 21, the lug 32 will also have a positional deviation from the casing notch 12 on the intermediate casing 1, which will cause the collar 3 to be unable to be assembled on the intermediate casing 1. Pull out the interference-fit bearing 2 and align it again

The assembly process is repeated many times, the assembly cycle is long, and it is easy to cause damage to the bearing 2

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