粗糙液膜机械密封液汽相变研究  

Study on Liquid Vapor Phase Transformation of Rough Liquid Film Mechanical Seals

作　　者：张伟政[1,2] 赵明仁 彭炜曦 任娅南 ZHANG Weizheng;ZHAO Mingren;PENG Weixi;REN Yanan(School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Wenzhou Pump and Valve Engineering Research Institute,Lanzhou University of Technology,Wenzhou Zhejiang 325105,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105

出　　处：《润滑与密封》2023年第12期8-16,共9页Lubrication Engineering

基　　金：甘肃省自然科学基金项目(18JR3RA145)。

摘　　要：以逆向重构的确定性粗糙表面机械密封模型为依据,建立机械密封微间隙三维粗糙液膜流动计算模型;联立黏温效应与流体物性参数,对比光滑模型和粗糙模型的流速、端面压力、温度和相态规律;研究粗糙模型在不同载荷和转速下对液膜密封汽化相变特性以及密封性能关键参数的影响。研究结果表明:粗糙模型受温度变化程度更大,从478 K增加到了493 K;相态分布均随温度的升高而增大,其中同一温度下,粗糙模型的汽相分布更多,且在493 K之后出口相变程度就达到了100%,最大相体积分数增加11.73%。从而推断出:随着压力升高,端面汽相占比逐渐降低,而转速增加促进了汽化的发生。Based on the deterministic rough surface mechanical seal model reconstructed in reverse,a three-dimensional rough liquid film flow calculation model was established.The viscosity-temperature effect and fluid physical parameters are combined,and the flow velocity,end face pressure,temperature and phase state laws of smooth model and rough model are compared.At the same time,the influence of rough model on the vaporization phase transformation characteristics and key sealing performance parameters of liquid film seal under load and rotational speed was studied.The results show that the roughness model is more affected by temperature change,which increases from 478 K to 493 K.The phase distribution increases with the increase of temperature,and the vapor phase distribution in the rough model increases more at the same temperature,and the phase transformation degree reaches 100%after 493 K,and the maximum phase volume fraction increases by 11.73%.It can be concluded that with the increase of pressure,the vapor phase ratio decreases gradually,and the increase of rotational speed promotes the occurrence of vaporization.

关 键 词：机械密封 相变 粗糙界面 泄漏率 性能 

分 类 号：TH136[机械工程—机械制造及自动化]