多油孔粗短轴结构分析及优化设计

粗短轴的受力形式与一般长轴有很大不同,横向剪切占很大成分,内部开设油道和多个通油孔则使得传统分析方法无法准确分析此类问题。以起升滑轮组定滑轮轴为例,利用有限元方法,将定滑轮处理为含内圆孔的矩形块,对滑轮组定滑轮轴进行接触分析;在处理多油孔轴复杂几何模型时采用多实体组合方式生成网格;计算分析不同加载方位下定滑轮轴的应力分布;从轴体结构型式、润滑油道及油孔布置及尺寸等方面着手进行轴的结构优化设计。研究成果对一般粗短轴的设计分析具有参考意义。

Structure analysis and optimization of a stub shaft with multi-oil-hole

Different from general long shafts, stub shafts are subjected a large part of transverse shear. It is difficult to apply conventional analysis methods to exactly analyze such shafts, because they possess internal oil way and oil holes. In this paper, taking the pulley block as the example, using finite element method, the shaft of the fixed pulley in hoisting pulleys is converted to rectangular blocks wlthcircular internal holes, contact analysis on the shaft of the fixed pulley is made ; utilizing multi-enti- ty compound mode to generate meshes of a multi-oil-hole shaft ; The stress distribution of the shaft of the fixed pulley is calcu- lated and analyzed under different direction loadings; Finally, the structural optimal design of shaft is carried out from those aspects of the structure type of the shaft, lubrication vittae, the layout of the oil holes and its dimension. The research conclu- sions of the paper can be the references for the design and analysis of the general stub shafts.