西华大学学报（自然科学版）2026，Vol.45Issue(5)：68-74,82,8.DOI:10.12198/j.issn.1673-159X.6146
橡胶材料对挠性叶轮泵叶轮应力与密封的影响
Influence of Rubber Materials on Impeller Stress and Sealing Performance of Flexible Impeller Pumps
摘要
Abstract
The rubber impellers of flexible impeller pumps are prone to fatigue failure due to local stress concentration during cyclic bending deformation,and the material properties of rubber exert a re-markable influence on its mechanical behavior.A single-blade finite element model was built based on LS-DYNA to simulate the complete operational cycle of the impellers within the stator cavity from installation and bending to elastic recovery,aiming to investigate the stress concentration characteristics and their cor-relation with materials.The stress responses of four materials(chloroprene rubber,nitrile butadiene rubber,polyurethane,and natural rubber)were systematically compared.Results reveal that the central regions near the edges of the front working surface and the midsection of the rear working surface are typical high-stress zones with peak equivalent stress of 1.48 MPa,making them susceptible to crack initiation.Different elast-ic materials have a significant influence on stress concentration characteristics.Hard rubbers like polyureth-ane generate contact stress up to 2.47 MPa due to strong conformity with the stator,ensuring excellent seal-ing performance but intensifying local stress concentration.In contrast,soft rubbers such as natural rubber have a contact stress of only 0.03 MPa,effectively reducing stress levels but compromising sealing due to poor conformity.关键词
挠性叶轮泵/有限元分析/橡胶材料/接触应力Key words
flexible impeller pump/finite element analysis/rubber material/contact stress分类
机械制造引用本文复制引用
韩佳明,叶道星,刘雪垠,宋冬梅,曾梦玮,岳婷,刘鹏..橡胶材料对挠性叶轮泵叶轮应力与密封的影响[J].西华大学学报（自然科学版）,2026,45(5):68-74,82,8.基金项目
四川省科技厅项目(2024ZHYS0009) （2024ZHYS0009）
国家一流专业项目(RC2200000478). （RC2200000478）
