流体机械2026，Vol.54Issue(3)：10-20,11.DOI:10.3969/j.issn.1005-0329.2026.03.002
液/气高压闸阀内漏量化试验及预测模型构建研究
Quantification experiment and prediction model construction for liquid/gas high-pressure gate valve internal leakage
摘要
Abstract
To address the threats of internal leakage in high-pressure gate valves to equipment safety and system energy efficiency optimization,research on quantitative detection and condition diagnosis of internal leakage was carried out.An internal leakage test platform for high-pressure gate valves was established,and ultrasonic testing technology was used to conduct internal leakage tests under various combined conditions involving two media(liquid/gas),inlet pressure from 10～70 MPa,defect sizes from 0.1～0.3 mm,and valve diameters from DN65～DN130.The results show that as inlet pressure and defect size increase,both the internal leakage flow rate and the ultrasonic signal of liquid/gate valves show an increasing trend;as valve diameter increases,both decrease,a phenomenon mainly influenced by wall thickness.Under the same conditions,the gas internal leakage flow rate is approximately 10～431 times that of liquid.The gas ultrasonic signal is generally stronger than that of liquid,with signal amplitude approximately 1.4～3.2 times that of liquid;during internal leakage in liquid/gas gate valves,the outlet ultrasonic signal is generally stronger than the inlet signal,with an average difference maintained at 7.2 dBμV RMS.Based on the Gaussian process regression(GPR)method,using the Matern 5/2 kernel function(length scale of 1,signal variance of 0.707 1),an internal leakage flow rate prediction model was constructed,achieving a prediction accuracy of 93.55%.The obtained laws and the model have good universality,providing reliable application basis and theoretical support for the quantitative assessment and operating condition diagnosis of internal leakage in high-pressure gate valves under different working conditions.关键词
高压闸阀/内漏量化/超声检测/量化模型Key words
high-pressure gate valve/internal leakage quantification/ultrasonic testing/quantification model分类
机械制造引用本文复制引用
李博伦,彭辉,席岳,傅登伟,邱福寿,伍剑波,向晓梅..液/气高压闸阀内漏量化试验及预测模型构建研究[J].流体机械,2026,54(3):10-20,11.基金项目
国家自然科学基金项目(62373265,52407013) （62373265,52407013）
