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汤红霞 《机械工人(冷加工)》2002,(12)
一、概述 回转支承主要有四种结构型式:单排球式、双排球式、交叉滚柱式和三排柱式。若按齿轮传动方式分类,则又可再分为外齿式、内齿式和无齿式。回转支承的产品标准有两种:JJ36.1~3/T-1999建筑机械用回转支承和JB2300/T-1999回转支承。回转支承是一种定型号、变参数产品,故在图样的设计过程中,可以对AutoCAD进行定制,开发出专用回转支承绘图CAD系统,从而极大地提高工艺设计人员的工作效率,缩短出图周期。 相似文献
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南京航空学院研制成功的四类结构回转支承CAD系统,采用引进西德HRS公司的回转支承设计理论和方法,具有80年代的先进水平。该系统解决了四种结构、十二种类型回转支承的计算机辅助设计计算和造型,并绘制产品图纸直接用于生产。根据支承的设计方法和系统硬件的配置采用了菜单技术,设计成组合式的程序系统。用于四种结构回转支承的设计,比通常人工设计提高工效约 相似文献
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塔式起重机回转支承主要为焊接结构,因此设计一套适合回转支承结构特点的焊接工装具有重要意义。针对某型塔式起重机回转支承的上、下支座,设计了一套焊接工装模板,并以上支座的筋板焊接工装为例对设计进行了说明。 相似文献
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Effect of raceway geometry parameters on the carrying capability and the service life of a four-point-contact slewing bearing 总被引:1,自引:0,他引:1
Xuehai Gao Xiaodiao Huang Hua Wang Rongjing Hong Jie Chen 《Journal of Mechanical Science and Technology》2010,24(10):2083-2089
The carrying capability and the service life of a four-point-contact slewing bearing are influenced significantly by its raceway
geometry parameters. In this paper, the carrying capability is characterized by the maximal contact stress in the paper. The
usual industry practice is to specify the service life as the L
10 life. The geometry parameters, cross section clearance, ratio of curvatures, rolling ball diameter, and initial contact angle,
are also considered. The sensitivity of each parameter influencing the carrying capability and the service life is discussed
as well. The results show an interesting phenomenon, indicating that the maximal contact load and the maximal stress do not
always have the same varying trend when discussed parameters vary. The developed design can be utilized as a reference for
an optimal slewing bearing design. If a slewing bearing of high static carrying capability is required, it can be designed
with large ratio of curvatures and rolling ball diameter. In terms of service life, the cross section clearance and the initial
contact load should also be considered. 相似文献
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