| 高压大排量径向柱塞泵滑靴副流固热耦合数值模拟 |
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| 引用本文： | 李少年,杨攀,包尚令,李毅.高压大排量径向柱塞泵滑靴副流固热耦合数值模拟[J].排灌机械工程学报,2022,40(9):887-894. |
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| 作者姓名： | 李少年 杨攀 包尚令 李毅 |
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| 作者单位： | 兰州理工大学能源与动力工程学院, 甘肃 兰州 730050 |
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| 摘 要： | 针对高压大排量径向柱塞泵滑靴副油膜的摩擦与润滑失效问题,在充分考虑油液的弱可压缩性以及黏温、黏压特性基础上,对滑靴副流场及固体域结构展开流固热耦合数值模拟,探讨不同工况对滑靴副油膜的支承特性以及滑靴、定子结构强度变化的影响规律.研究结果表明:随着径向柱塞泵工作压力的升高,滑靴副油膜压力有较大幅度的上升,油膜的速度场与温度场基本不变;随着径向柱塞泵转速的增大,滑靴副油膜内油液的速度及温度均有较大幅度的上升,油膜的压力场基本不变;滑靴的最大变形与应力均出现在滑靴副中心油腔底部的阻尼孔出口边缘,该部位几何结构较薄,且承受中心油腔高压油压力载荷与温度载荷,是整个滑靴结构中强度最薄弱的部分;同时,黏性摩擦产热导致的油膜温升对滑靴副的结构强度有较大影响,也是限制柱塞泵转速提升的一个重要因素.研究结果可为高压大排量径向柱塞泵滑靴副优化设计提供一定的参考.
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| 关 键 词： | 径向柱塞泵 滑靴副 流场 油膜 流固热耦合 |
| 收稿时间： | 2022-04-07 |
Numerical simulation of fluid-structure-thermal coupling of slipper pair in high-pressure and large-displacement radial piston pump |
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| LI Shaonian,YANG Pan,BAO Shangling,LI Yi.Numerical simulation of fluid-structure-thermal coupling of slipper pair in high-pressure and large-displacement radial piston pump[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(9):887-894. |
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| Authors: | LI Shaonian YANG Pan BAO Shangling LI Yi |
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| Institution: | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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| Abstract: | Aiming at the friction and lubrication failure problem of the oil film on slipper pair in high-pressure and large-displacement radial piston pump, the numerical simulation of fluid-structure-thermal coupling was carried out for the flow field and solid domain structure of slipper pair under the consideration of the weak compressibility, viscosity-temperature and viscosity-pressure characteristics of oil. The influence of working conditions on the oil film bearing characteristics of the slipper pair and the variation of the structural strength of the slipper and the stator were discussed. The results show that with the increase of the working pressure of the piston pump, the oil film pressure of the slipper pair increases greatly, and the velocity field and temperature field of the oil film remain basically unchanged. With the increase of the piston pump rotation speed, the oil velocity and temperature of the slipper pair oil film increased greatly, and the pressure field of the oil film is basically remained unchanged. The maximum deformation and stress of the slipper appeared at the outlet edge of the damping hole at the bottom of the central oil cavity. The geometrical structure of this part is thin, and it has to bear the high pressure oil pressure load and temperature load of the central oil cavity, so it is the weakest part of the whole slipper structure. At the same time, the oil film temperature rise caused by the heat generation of viscous friction has a great influence on the structural strength of the slipper pair, which is also an important factor limiting the rotation speed increase of the piston pump. The results can provide some reference for the optimization design of high-pressure and large-displacement radial piston pump slipper pair. |
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| Keywords: | radial piston pump slipper pair flow field oil film fluid-structure-thermal coupling |
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