Research on buffer structure and flow field simulation of swash plate plunger type hydraulic transformer  

作　　者：WANG Xiaojing HUO Shuhang LI Wenjie 王晓晶;HUO Shuhang;LI Wenjie(Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicle,Beijing University of Civil Engineering and Architecture,Beijing 102616,P.R.China;Beijing Engineering Research Center of Monitoring for Construction Safety,Beijing University of Civil Engineering and Architecture,Beijing 102616,P.R.China;School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,P.R.China)

机构地区：[1]Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicle,Beijing University of Civil Engineering and Architecture,Beijing 102616,P.R.China [2]Beijing Engineering Research Center of Monitoring for Construction Safety,Beijing University of Civil Engineering and Architecture,Beijing 102616,P.R.China [3]School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,P.R.China

出　　处：《High Technology Letters》2022年第4期425-433,共9页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.51975164);Outstanding Youth of Pyramid Talent Training Project ofBeijing University of Civil Engineering and Architecture(No.GDRC20220801)。

摘　　要：In order to solve the problem of excessive noise and vibration during the operation of the hydraulic transformer,an optimization method of valve plate damping hole structure is proposed to alleviate the phenomenon of pressure shock.Firstly,the mathematical model of oil pressure gradient in the plunger cavity is established,and the incremental equation of pressure change is derived.Secondly,a kind of buffering structure is proposed,the corresponding relationship between the pressure change and the envelopment angle of the buffering hole and the aperture size is determined by analyzing the oil pressure change curve in the plunger cavity.Finally,the flow field models with buffering holes are established,and the transient simulation of the pressure change process under the optimal solution is carried out with ANSYS software and the flow field pressure distribution contours are obtained.Through the analysis of simulation results,it is concluded that the optimal envelope angle of the three buffer holes ofA-T-B-Ais 5°,and the optimal aperture is 1.8 mm,1.6 mm,and 1.7 mm,respectively.The buffer hole can achieve a better-buffering effect in the range of variable pressure angle[0°,101°].The buffer hole structure can effectively alleviate the pressure shock and reduce the noise level,which lays a foundation for the design and theoretical research of hydraulic transformers.

关 键 词：hydraulic transformer pressure shock buffer structure flow field simulation dynamic grid 

分 类 号：TM40[电气工程—电器]