在给定资源期间,确保强制柴油机活塞可靠性的概念问题

Q4 Engineering
A. Marchenko, O. Linkov, V. Pylyov, S. Lykov, R. Aryan, V. Pylyov
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引用次数: 0

摘要

现代电厂的设计包括对结构与既定的可靠度和资源供给参数的符合性进行计算研究。然而,在某些情况下,根据计算可以运行的结构,甚至在接近其资源极限之前,甚至在开始运行时就失败了。这种情况的发生是由于建筑中使用的材料在其强度极限下工作,有时甚至超过它,因为近年来发电厂的容量不断增加,同时保持对其资源的要求。因此,有必要补充模型,以考虑影响结构的物理和参数可靠性的复杂因素。分析了文献资料,确定了研究任务,分析了活塞作为热载荷最大的结构元件之一,其物理可靠性和参数可靠性损失的主要问题,分析了活塞特征临界区域的热应力状态,提出了通过调节结构温度状态来保证活塞可靠性的方法。在分析结果的基础上,对气缸-活塞组零件热应力区可靠性预测模型进行了改进,提出了相应的集成软件方案,并制定了应用要求。该方法的基础是应用结构的物理可靠度准则和两个参数可靠度准则-摩擦副磨损和不超过材料蠕变极限。这项工作使获得保证满足物理和参数可靠性要求的设计成为可能。还指出了在扩大有关结构中使用的材料性质的信息方面需要进一步的工作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
CONCEPTUAL ISSUES ON ENSURING THE RELIABILITY OF A FORCED DIESEL ENGINES PISTONS DURING A GIVEN RESOURCE
The design of modern power plants involves conducting calculation studies on the compliance of the structure with the established parameters of reliability and resource provision. However, there are cases when the structure, which according to the calculations is operational, fails in operation even before approaching the limit of its resource, and sometimes even at the beginning of operation. Such cases occur due to the fact that the materials used in the construction work at the limit of their strength, and sometimes crossing it, because in recent years there has been a constant increase in the capacity of power plants while maintaining the requirements for their resource. Thus, it becomes necessary to supplement the models to take into account a complex of factors affecting the physical and parametric reliability of the structure. The paper analyzes publications and sets a task for research, analyzes the main problems of loss of physical and parametric reliability of the piston, as one of the most thermally loaded structural elements, analyzes the thermally stressed state of characteristic critical zones of the piston, shows ways to ensure the reliability of pistons through adjusting the temperature state of structures. Based on the results of the analysis, the model for predicting the reliability of heat-stressed zones of parts of the cylinder-piston group was improved, the corresponding scheme of the integrated software complex was proposed, and the requirements for its application were formulated. The basis of the approach is the application of the criterion of physical reliability of structures and two criteria of their parametric reliability - from wear of friction pairs and not exceeding the creep limit of the material. This work makes it possible to obtain a design that is guaranteed to satisfy the requirements for physical and parametric reliability. The need for further work in the direction of expanding information about the properties of materials used in structures is also shown.
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来源期刊
内燃机学报
内燃机学报 Engineering-Mechanical Engineering
CiteScore
1.00
自引率
0.00%
发文量
3050
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