往复式压缩机曲轴数字化分析与设计

为提高往复式压缩机的设计水平,利用VC++编程语言和Pro/E软件,开发了曲轴的数字化分析与设计系统.依据热力学与动力学原理,分析一个循环周期内曲轴的应力变化情况.根据危险截面几何尺寸、加工工艺、材料强度等参数的随机性,建立极限状态方程,分析疲劳强度可靠度及参数的灵敏度,使用VC实现数字化的分析过程;综合考虑各参数对可靠度的影响及控制的难易程度,确定设计数据(尺寸、工艺、材料等信息),使用Pro/E进行数字化设计.结果表明,结合可靠性理论与现代计算机技术的数字化研究系统,在工程实际中具有良好的应用前景.

Digital Analysis and Design of Crankshaft of a Reciprocating Compressor

To improve the design of a reciprocating compressor, the Visual C++ and Pro/E were used to develop a system software for the digital analysis and design of crankshaft. The stress state of crankshaft was analyzed during a cycle period on the principle of both thermodynamics and dynamics. A limit-state equation was given for the critical sections according to the randomness of design parameters, such as geometric dimensions, machining process and material strength. Then, both the reliability of fatigue strength and the sensitivity of influencing parameters were discussed so as to implement the digital analysis via VC. And all the design parameters of the crankshaft, including dimensions, process technology and material, were thus determined to implement the digital design via Pro/E. The results showed that the digital system software combining reliability theory with modern computer technology is highly promising in engineering practice.