2024年5月1日发(作者：)

专利内容由知识产权出版社提供

专利名称：SHRINK-FITTED ROTOR

发明人：IZUMI ISAO,KIMURA KAZUNARI

申请号：JP22952982

申请日：19821223

公开号：JPS59115128A

公开日：19840703

摘要：PURPOSE:To improve the resisting limit for the fretting fatigue of a rotor shaft

and prevent generation of cracks by applying from the tempering temperature, the low-

temperature quenching treatment onto the parts of the rotor shaft which is applied with

shrink fit, and allowing a compression residual stress to internally exist on the surface

layer at the above-described part of the rotor. CONSTITUTION:A rotor shaft 10 is

applied with a series of heat treatment consisting of normalizing, quenching, and

tempering, and then heated up to about 630 deg.C. As the final tempering treatment at a

temperature rising speed of 40 deg.C per hour by coils 12 and 13, and kept at this

temperature for 24hr, and then applied with low-temperature quenching by oil cooling.

Each compression residual stress internally exists on each surface of the predetermined

range 11a for shrink fit to sleeve and the predetermined range 11b for shrink fit of

coupling because of the temperature difference between the inner part and the surface

layer in the above-described low-temperature quenching. The structure of the surface

layer is the same to the quenching structure of the inner part. With such a constitution,

the resisting limit for fretting fatigue of the rotor shaft is improved, and the generation

of cracks can be prevented.

申请人：TOSHIBA KK

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