Design of Minimum Diameter of Piston Neck in Swashplate Axial Piston Pump

doi:10.3901/JME.2024.04.430

Abstract

Abstract: In order to solve the problem of the swashplate axial piston pump causing the plunger neck fracture under high speed and high pressure, the design and verification of the plunger neck of the plunger pump are studied, and the design method of the minimum diameter of the plunger neck is proposed. Based on the force analysis of the plunger shoe assembly in the drain area, a force model of the plunger neck under high pressure is established. Based on the stress-strength interference distribution theory, combined with the stress distribution of the plunger neck and the fatigue strength of the plunger, the expression of the fatigue reliability of the plunger neck is proposed, and the minimum diameter of the neck of the plunger of the axial piston pump is obtained. The finite element method was used to perform static simulation analysis of the plunger with the minimum neck diameter, and the safety check of the plunger strength was realized by combining the stress cloud diagram. Under the rated working conditions, the axial piston pump designed according to the design method of the minimum diameter of the plunger neck was tested with volumetric efficiency and mechanical efficiency, the design criteria are used to verify the design of the plunger neck of the axial piston pump of similar products,and the rationality of the proposed design method of the minimum diameter of the plunger neck was verified.

Key words: piston neck, swashplate axial piston pump, stress field simulation, static reliability, stress-strength interference

CLC Number:

TH322

LI Ying, ZHANG Jiafang, ZHANG Zhaoyong, WANG Xincheng, ZHANG Jin, KONG Xiangdong. Design of Minimum Diameter of Piston Neck in Swashplate Axial Piston Pump[J]. Journal of Mechanical Engineering, 2024, 60(4): 430-437.

References

[1] 白国庆,董乃强,武昭晖,等.某斜盘式柱塞泵柱塞颈部结构参数计算及仿真分析[J].液压与气动,2017(2):97-100.BAI Guoqing,DONG Naiqiang,WU Zhaohui,et al.Calculation and simulation analysis of plunger neck structure parameters of swash plate plunger pump[J].Hydraulic and Pneumatic,2017(2):97-100.
[2] 翟培祥.斜盘式轴向柱塞泵设计[M].北京:煤炭工业出版社,1978.ZHAI Peixiang. Swashplate axial piston pump design[M].Beijing:China Coal Industry Publishing House,1978.
[3] 徐绳武.柱塞式液压泵[M].北京:机械工业出版社,1985.XU Shengwu. Piston-type hydraulic pump[M]. Beijing:Mechanical Industry Publisher,1985.
[4] HUANG Tiancheng, ZHOU Sizhu, YUAN Xinmei.Reliability analysis for plunger pump fluid end based on random finite element method[C]//Advanced Materials Research. Trans. Tech. Publications Ltd.,2012,479:1573-1577.
[5] KOWALSKI J,PYLAK K. Minimum mass design of a three-throw plunger pump[J]. International Journal of Pressure Vessels and Piping,1991,49(1):35-59.
[6] 彭佑多,梁洁萍,叶笑洋. TDB径向柱塞泵的设计与研究-柱塞副两个基本公式的导出[J].湘潭矿业学院学报,1996,11(4):51-55.PENG Youduo,LIANG Jieping,YE Xiaoyang. Design and study of TDB radial piston pump-Derivation of two basic formulas for piston pair[J]. Journal of Xiangtan Mining Institute,1996,11(4):51-55.
[7] 王煜.柱塞式能量回收装置的研制[D].兰州:兰州理工大学,2021.WANG Yu. Development of plunger type energy recovery device[D]. Lanzhou:Lanzhou University of Technology,2021.
[8] 段珊珊.轴向柱塞泵滑靴及其偶件的应力特性仿真分析[D].太原:太原理工大学,2018.DUAN Shanshan. Simulation and analysis of stress characteristics of slipper and its coupling in axial piston pump[D]. Taiyuan:Taiyuan University of Technology,2018.
[9] 刘华江.斜盘式海水柱塞泵的可靠性分析和试验研究[D].北京:北京工业大学,2014.LIU Huajiang. Reliability analysis and experimental research of swash plate seawater piston pump[D].Beijing:Beijing University of Technology,2014.
[10] KACANI V. Systematic parametric design/calculation of the piston rod unit[C]//IOP Conference Series:Materials Science and Engineering. IOP Publishing,2015,90(1):012024.
[11] IVANTYSYN J, IVANTYSYNOVA M. Hydrostatic pumps and motors:Principle,design,performance,modeling, analysis,control and testing[M]. New Dehli:Academic Books International,2001.
[12] ACHTEN P A J. Power density of the floating cup axial piston principle[C]//ASME International Mechanical Engineering Congress and Exposition. 2004,47101:11-22.
[13] CHOUDHURI K,CHAKRABORTY S,CHAKRABORTI P,et al. Stress analysis and design optimization of piston slipper assembly in an axial piston pump[J]. Journal of Scientific & Industrial Research,2014,73(5):318-323.
[14] SHANG L,IVANTYSYNOVA M. A temperature adaptive piston design for swash plate type axial piston machines[J]. International Journal of Fluid Power,2017,18(1):38-48.
[15] 何存兴.液压元件[M].北京:机械工业出版社,1982.HE Cunxing. Hydraulic components[M]. Beijing:China Machine Press,1982.
[16] 许耀铭.油膜理论与液压泵和马达的摩擦副设计[M].北京:机械工业出版社,1987.XU Yaoming. Oil film theory and friction pair design of hydraulic pump and motor[M]. Beijing:China Machine Press,1987.
[17] 朱元泽,李贤彬,董金林.概率论与数理统计[M].北京:高等教育出版社,2020.ZHU Yuanze,LI Xianbin,DONG Jinlin. Probability theory and mathematical statistics[M]. Beijing:Higher Education Press,2020.
[18] 李壮云,葛宜远.液压元件与系统[M].北京:机械工业出版社,1999.LI Zhuangyun,GE Yiyuan. Hydraulic components and systems[M]. Beijing:China Machine Press,1999.
[19] 张哲.基于工程机械用斜盘式轴向柱塞泵关键组件的数字化设计系统研究[D].烟台:烟台大学,2021.ZHANG Zhe. Research on digital design system based on key components of swash plate axial piston pump for construction machinery[D]. Yantai:Yantai University,2021.