旋转轴抗疲劳设计
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- 英文论文题名：Resist fatigue design for rotary shaft
- 论文作者：苏荔 ; 江超
- 英文论文作者：SU Li ; JIANG Chao ; Research Institute of Physical and Chemical Engineer of Nuclear Industry
- 年：2015
- 作者机构：核工业理化工程研究院;
- 论文关键词：旋转轴 ; 抗疲劳设计 ; 疲劳强度 ; 可靠度
- 英文论文关键词：rotary shaft ; resist fatigue design ; fatigue intension ; reliability
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第4册（同位素分离分卷）
- 语种：中文
- 分类号：TH133.2
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：677k
- 原文格式：O
- 会议级别：全国
摘要
旋转轴是设备的关键部件之一,是易发生疲劳破坏的部件,其一旦发生疲劳破坏将会对设备产生致命影响。旋转轴由轴与轴套组成,轴套是旋转轴产生疲劳破坏的薄弱环节,理论分析表明,轴套中心孔的边缘处会产生应力集中,使得旋转轴的疲劳强度降低,通过对轴套进行倒角设计,可以提高旋转轴的抗疲劳性能,并对不同倒角设计尺寸的旋转轴开展了疲劳极限试验,根据试验结果,从抗疲劳角度提出了最佳的轴套倒角设计尺寸。旋转轴采用轴与轴套的过盈装配方式,此装配方式,旋转轴将会受到轴套法向压应力作用,装配过盈量越大,旋转轴法向压应力越大。在发生疲劳时,旋转轴同时还要承受轴向拉压应力的作用,在两个配合面间产生摩擦力。在法向压应力和摩擦力的作用下,轴和轴套的过盈接触面间会产生往复错动,产生微动磨损,导致旋转轴的疲劳极限降低。过盈量将会对旋转轴的抗疲劳性能产生影响。为此,对轴与轴套的过盈装配量进行了抗疲劳设计,确定出合适的轴与轴套过盈量尺寸范围。通过轴套倒角尺寸设计和装配过盈量设计,有效提高了旋转轴的抗疲劳性能。在进行旋转轴抗疲劳设计的基础上,对事故状态下,旋转轴的疲劳强度可靠度进行了计算,计算结果表明,旋转轴的疲劳强度具有较高的可靠度,能够满足设备的可靠性设计要求。
Rotary shaft is an importmant part of equipment.It is easy to occur fatigue.Rotary shaft is made up of shaft and axes sheath.Axes sheath is weakness to occur fatigue,because of stress concentrate on the center aperture of axer sheath.Through chamfer design for axes sheath,the capability of resist fatigue for rotary shaft is advanced.According to the test result,ascertain the size of chamfer for axes sheath.Rotary shaft is interference fit from shaft and axes sheath.When happen fatigue,matching surface endure action come from conpressive stress and friction force simultaneously.So interference fit size can also affect the capability of resist fatigue for rotary shaft.Through the interference fit size design,ascertain the size of interference fit for rotary shaft,advance the capability of resist fatigue for rotary shaft.On the base of resist fatigue design,compute the reliability of fatigue intension.The compute result indicates the reliability of fatigue intension can satify the demand of reliability design for equipment.
Rotary shaft is an importmant part of equipment.It is easy to occur fatigue.Rotary shaft is made up of shaft and axes sheath.Axes sheath is weakness to occur fatigue,because of stress concentrate on the center aperture of axer sheath.Through chamfer design for axes sheath,the capability of resist fatigue for rotary shaft is advanced.According to the test result,ascertain the size of chamfer for axes sheath.Rotary shaft is interference fit from shaft and axes sheath.When happen fatigue,matching surface endure action come from conpressive stress and friction force simultaneously.So interference fit size can also affect the capability of resist fatigue for rotary shaft.Through the interference fit size design,ascertain the size of interference fit for rotary shaft,advance the capability of resist fatigue for rotary shaft.On the base of resist fatigue design,compute the reliability of fatigue intension.The compute result indicates the reliability of fatigue intension can satify the demand of reliability design for equipment.
引文
[1]赵少汴.抗疲劳设计[M].北京:机械工业出版社,1994:1-29.
[2]王文斌,等.机械设计手册第五卷[M].北京:机械工业出版社,2004:31-17.
[3]徐灏,等.机械设计手册第二卷[M].北京:机械工业出版社,1995:4-20.
[4]张栋.机械失效的实用分析[M].北京:国防工业出版社,1997:208-210.
[2]王文斌,等.机械设计手册第五卷[M].北京:机械工业出版社,2004:31-17.
[3]徐灏,等.机械设计手册第二卷[M].北京:机械工业出版社,1995:4-20.
[4]张栋.机械失效的实用分析[M].北京:国防工业出版社,1997:208-210.