超高压柱塞泵柱塞副的油膜温度特性研究  

Temperature characteristic of plunger pair-oil film in ultra-high pressure plunger pump

作　　者：夏宏新 王淑平 曾先顺 丁华 王义亮 XIA Hongxin;WANG Shuping;ZENG Xianshun;DING Hua;WANG Yiliang(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024

出　　处：《机电工程》2024年第9期1677-1683,共7页Journal of Mechanical & Electrical Engineering

基　　金：山西省科技重大专项计划“揭榜挂帅”项目(202101010101018);山西省科技合作交流专项项目(202104041101003)。

摘　　要：柱塞副油膜温度特性是影响超高压柱塞泵性能的重要因素,针对油膜温度导致超高压柱塞泵容积效率低和密封失效等问题,对柱塞副间隙油膜温度特性进行了分析,研究了不同因素对超高压柱塞泵柱塞副油膜温度特性的影响规律。首先,建立了超高压状态下油液的黏温黏压方程和柱塞泵工作过程中的柱塞运动方程;然后,分析了间隙中流体的流动状态,采用ANSYS-Fluent研究了柱塞副间隙油膜温度场分布情况和负载压力、主轴转速、间隙高度、密封长度等四种因素对油膜温度的影响规律;最后,通过四因素四水平正交试验,确定了各因素对油膜温度影响的主次顺序。研究结果表明:负载压力每增加10 MPa,油膜最高温度升高6℃左右;主轴转速每提高100 r/min,油膜最高温度增加0.76℃左右。间隙高度越大,间隙出口油膜温度波动越小;负载压力对油膜温度影响程度最大,密封长度影响最小。该研究结果可为超高压柱塞泵柱塞副的设计提供参考。The temperature characteristics of the plunger pair oil film was an important factor affecting the performance of ultra-high pressure plunger pump.Aiming at the issues such as low volumetric efficiency and seal failure caused by elevated oil film temperature in the high-pressure plunger pump,research was conducted on the temperature characteristics of the oil film in the plunger pair clearance.The influence of different factors on the oil film temperature characteristics of plunger pair of ultra-high pressure piston pump was studied.Firstly,an analysis was established on the equation of viscosity-temperature-viscosity-pressure of the oil under ultra-high-pressure conditions and the equation of the plunger during pump operation.Then,the fluid flow status in the clearance of the plunger pair was analyzed,and the distribution of the oil film temperature field in the clearance,as well as the influence laws of four factors including load pressure,spindle speed,clearance height,and sealing length on the oil film temperature,were studied using ANSYS-Fluent.Finally,the main and secondary orders of the influences of each factor on the oil film temperature were determined through a designed four-factor and four-level orthogonal experiment.Research findings indicate that for every 10 MPa increase in load pressure,the oil film temperature increases by approximately 6 ℃.Similarly,with every 100 r/min increase in spindle speed,the maximum oil film temperature increases by around 0.76 ℃.The larger the clearance height,the smaller the fluctuation in outlet oil film temperature.Load pressure has the greatest impact on oil film temperature,while sealing length has the smallest influence.This study provides a reference for the design of plunger pairs in ultra-high pressure plunger pumps.

关 键 词：容积泵 容积效率 黏温黏压 油膜温度 Fluent仿真分析 正交分析 负载压力 

分 类 号：TH322[机械工程—机械制造及自动化] U464[机械工程—车辆工程]