往复式压缩机曲轴强度影响因素研究

发布时间：2018-08-05 09:59

【摘要】：过渡圆角形式和半径、润滑油道直径以及连杆轴颈的长度等是影响曲轴强度的重要因素。结合正交试验设计,运用三维建模技术建立16组不同影响因素组合下的往复式压缩机曲轴模型,按照有限宽度轴径油膜压力分布规律对其施加载荷,经求解分析,得出各因素与曲轴强度的关系。针对由曲轴结构复杂而导致在过渡圆角处出现的应力奇异现象,提出外插值的方法进行评估。结果表明,除连杆轴颈的长度对曲轴的强度影响不大外,过渡圆角的形式以及半径大小均有不同程度的影响,其中内圆角的应力值远大于外圆角。研究往复式压缩机曲轴强度的影响因素,对曲轴设计时部分尺寸的选用以及强度校核有一定指导作用。
[Abstract]:The form and radius of transition angle, the diameter of lubricating oil channel and the length of connecting rod are the important factors affecting the strength of crankshaft. Combined with orthogonal test design, 16 groups of crankshaft models of reciprocating compressor under different influence factors were established by using 3D modeling technology. According to the distribution law of oil film pressure of finite width axis diameter, the crankshaft model was solved and analyzed. The relationship between various factors and the strength of crankshaft is obtained. In view of the stress singularity at the transition corner caused by the complex structure of the crankshaft, an extrapolation method is proposed to evaluate the stress singularity. The results show that, except the length of the connecting rod neck has little influence on the strength of the crankshaft, the form and radius of the transition angle have different effects, and the stress value of the inner circular angle is much larger than that of the outer circular angle. The influence factors of crankshaft strength of reciprocating compressor are studied, which can guide the selection of some dimensions and strength checking in the design of crankshaft.
【作者单位】：中国石油大学(华东)机电工程学院;中石化石油机械股份有限公司;
【基金】：基金项目:工业和信息化部“海洋大功率往复式压缩机研制”(联装[2014]506号)
【分类号】：TH45

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