单螺杆压缩机啮合副油膜流场数学模型研究  

Study of oil film flow field simulation models in meshing pairs for single screw compressor

作　　者：黄锐 夏天[1] 陈国庆 孙帅辉[1] HUANG Rui;XIA Tian;CHEN Guoqing;SUN Shuaihui(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《西安理工大学学报》2022年第2期185-193,共9页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51706179);陕西省自然科学基础研究计划资助项目(2019JQ-733);陕西省教育厅研究计划专项资助项目(17JK0543)。

摘　　要：本文针对单螺杆压缩机啮合副油膜流场数学模型进行研究。目前对于该油膜流场的模拟,常采用的模型为油膜压力分段计算模型,而此模型未考虑润滑油沿星轮齿长方向上的流动和星轮齿面扩散区域导致的油膜负压,是否适用于啮合副油膜流场计算,仍未有直接实验验证结果。为此,本文建立了啮合副间隙的三维模型,考虑了沿星轮齿长方向上的润滑油流动和几何扩散区域的空穴现象,提出了油膜流场数值模拟计算模型,搭建了啮合副油膜流场压力测试实验台,并基于ANSYS FLUENT对实验台啮合副间隙内的油膜压力场进行模拟,且将实验结果与本文模型和油膜压力分段计算模型进行对比分析,并考察了两种数学模型的精确度和适用性。对比结果表明:油膜压力分段计算模型得出的油膜压力场整体大于本文模型得出的压力场;油膜压力分段计算模型在星轮齿型面为单直线型面且螺杆转速较低时,与实验结果吻合较好;而本文模型在三种型面以及两种螺杆转速下均与实验结果吻合良好。The mathematical model for the oil film flow field in meshing pair gap of single screw compressor is studied.At present,the commonly used model is the oil film pressure segmented calculation model,but this model does not consider the lubricating oil flow in the star-wheel tooth length direction and the oil film negative pressure caused by the divergent area of meshing gap.Whether the model is suitable for the calculation of oil film flow field in the meshing gap has not been directly validated by experiments.Therefore,this paper proposes a three-dimensional oil film numerical simulation model considering the lubricating oil flow in the tooth length direction and the cavitation in the divergent area,and builds an oil film pressure test-bed.The oil film pressure field in the experimental meshing pair gap is simulated via ANSYS FLUENT and compared with the segmented calculation model results and the experimental results.Finally,the accuracy and applicability of the two kinds of models are investigated.Results show that the oil film pressure field obtained from the segmented calculation model is larger than that obtained by the numerical simulation method.The segmented calculation is in good agreement with the experimental results when the tooth profile is single line envelope profile and the screw speed is low.The numerical simulation method is in good agreement with the experimental results under three types of profiles and two kinds of screw speeds.

关 键 词：单螺杆压缩机 啮合副 型面 油膜流场 

分 类 号：TK17[动力工程及工程热物理—热能工程]