基于热力特性的柴油机钢活塞轻量化设计。

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Yang Liu, Jilin Lei, Jikun Chen, Weiwei Gao, Hu Peng, Jianrui Wang
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引用次数: 0

摘要

传统的铝硅合金活塞逐渐被钢制活塞所取代,已成为未来柴油机发展的趋势。然而,钢的高密度限制了钢活塞的高效设计和广泛应用。为此,本文提出了一种新的柴油机钢活塞轻量化设计方法。对冷却廊截面进行渐进式设计,对窗区进行拓扑优化,以满足强度和变形要求。最终得到了轻量化钢活塞(LSP)。研究结果表明,与原钢活塞(OSP)相比,LSP的总质量可降低8.86%。LSP的热态都优于OSP。最高温度、最大热应力、最大纵向热变形和最大横向热变形分别降低0.96℃、3.03%、11.65%和8.99%。与OSP相比,LSP具有更大的热-机械耦合应力表现。而纵向和横向热-机械耦合变形最大,分别减小8.33%和42.19%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The lightweight design of steel pistons for diesel engines based on thermo-mechanical characteristics.

The lightweight design of steel pistons for diesel engines based on thermo-mechanical characteristics.

The lightweight design of steel pistons for diesel engines based on thermo-mechanical characteristics.

The lightweight design of steel pistons for diesel engines based on thermo-mechanical characteristics.

Traditional aluminum-silicon alloy pistons are gradually replaced by steel pistons, which has become the trend of future diesel engine development. However, the efficient design and broad application of steel pistons are limited by the higher density of steel. For this reason, a new lightweight design method for steel pistons in diesel engines was proposed in this paper. The progressive design of the cooling gallery cross-section and the topology optimization of the window region were carried out to meet the strength and deformation requirements. Ultimately, a lightweight steel piston (LSP) was obtained. The results of the study showed that the total mass of LSP could be reduced by 8.86% compared to the original steel piston (OSP). The thermal states of LSP are all superior to those of OSP. The highest temperature, maximum thermal stress, maximum longitudinal thermal deformation, and maximum transverse thermal deformation can be reduced by 0.96 °C, 3.03%, 11.65%, and 8.99%, respectively. LSP has a larger thermo-mechanical coupling stress manifestation compared to OSP. However, the maximum longitudinal and transverse thermo-mechanical coupling deformations can be obtained with a significant reduction of 8.33% and 42.19%, respectively.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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