流体机械2025，Vol.53Issue(8)：36-43,111,9.DOI:10.3969/j.issn.1005-0329.2025.08.005
选煤厂重介悬浮液用电动球阀的冲蚀性能研究
Study on erosion performance of electric ball valves for heavy medium suspension in coal preparation plants
摘要
Abstract
To address the erosion wear issue of electric ball valves used in heavy medium suspension transportation systems of coal preparation plants,a combined approach of numerical simulation and experimental study was adopted to investigate the formation mechanism of the erosion process.The erosion rate,erosion area,and damage distribution patterns of electric ball valves under different inlet flow velocities,particle sizes,and valve openings were analyzed.The results show that compared to particle size and valve opening,the inlet flow velocity has a more significant impact on the erosion wear of electric ball valves and is the dominant factor affecting the erosion rate.When the inlet flow velocity increases from 0.8 m/s to 1.5 m/s,the maximum erosion rate increases from 1.76´10-4 kg/(m2∙s)to 1.958´10-3 kg/(m2∙s),while the erosion area on the sphere surface expands significantly.The formation of erosion pits mainly stems from microcrack propagation and material spallation caused by high-speed particle impact,with large-sized particles capable of forming erosion pits 20～50 μm in diameter.By controlling the inlet flow velocity to no more than 1.0 m/s,restricting heavy medium particle size below 45 μm,and adjusting the valve opening to the optimized range of 60%～80%,the degree of spherical erosion damage can be significantly reduced,thereby effectively extending the service life of electric ball valves.This study not only provides an optimization solution for the stable operation of heavy medium suspension transportation systems but also lays a theoretical foundation for achieving precise flow control.关键词
电动球阀/冲蚀性能/选煤厂/重介悬浮液Key words
electric ball valve/erosion performance/coal preparation plant/heavy medium suspension分类
机械制造引用本文复制引用
张旭可,马猛猛,王建斌,王凯雄,王章国,李海生..选煤厂重介悬浮液用电动球阀的冲蚀性能研究[J].流体机械,2025,53(8):36-43,111,9.基金项目
国家自然科学基金项目(51105362) （51105362）
