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A method of rotor press-fitting with interference fit

A technology of interference fit and rotor, applied in the direction of supporting elements of blades, metal processing equipment, metal processing, etc., to achieve the effect of reducing dispersion

Active Publication Date: 2022-07-29
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a rotor press-fitting method with a spigot interference fit to solve or alleviate at least one of the problems in the background technology

Method used

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  • A method of rotor press-fitting with interference fit
  • A method of rotor press-fitting with interference fit

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application.

[0023] like figure 1 As shown, the first-stage rotor 10 and the second-stage rotor 20 are matched through a stopper structure 30, and the stopper structure 30 includes an interference surface 31 (parallel to the axis 50) and a mating end surface 32 (perpendicular to the axis 50). The spigot portion of the stage rotor 10 is contained within the spigot portion of the second stage rotor 20 .

[0024] In order to install the first-stage rotor 10 into the second-stage rotor 20, and avoid the problems as set forth in the background art, the present application provides a rotor press-fitting method, which specifically includes:

[0025] S1. Determine the...

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Abstract

The present application provides a method for press-fitting a rotor with an interference fit of the spigot, including: determining the temperature difference required to eliminate the interference of the rotor spigot according to the spigot structure parameters, material properties and assembly time of the pressed rotor; The size, material thermal conductivity and the temperature difference determine the lower limit of the pressing force required to keep the end face of the spigot in contact; determine the upper limit of the pressing force that the pressed rotor can bear according to the boundary conditions of the pressed rotor; The lower limit of the pressing force and the upper limit of the pressing force determine the actual pressing force; according to the determined temperature difference, change the temperature of the pressed rotor, so that the determined actual pressing force will be pressed by the pressing rotor; keep the pressing force, pass The connecting piece connects the pressed rotor with the pressure bearing rotor, and tightens the connecting piece; releasing the pressing force exerted on the pressed rotor. The rotor press-fitting method of the present application can prevent the rotor from tilting due to the influence of assembly and bolt tightening, and can also reduce the dispersion of the pre-tightening force of each bolt in the bolt group.

Description

technical field [0001] The application belongs to the technical field of aero-engine assembly, and in particular relates to a method for press-fitting a rotor with an interference fit at the mouth. Background technique [0002] Interference fit is usually used between all levels of aero-engine rotor discs to achieve the centering and positioning function. For the assembly of the rotor interference stop, heating or cooling is usually used to create a fitting gap or reduce the interference between the containing part and the contained part, and then install it. After the spigot assembly is in place, the rotor returns to normal temperature, but stress is generated due to temperature changes, resulting in a gap between the spigot mating end faces. [0003] In order to eliminate the above-mentioned gaps, a wrench is usually used to tighten the fasteners of the rotor overrun stopper according to the crisscross method, and the end face clearance of the stopper is eliminated by pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/02B23P19/02
CPCF01D5/025B23P19/02
Inventor 张津铭赵洪丰卢师航吴法勇
Owner AECC SHENYANG ENGINE RES INST
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