摘要
利用fluent软件的mixture(两相混合)模型及RNGκ-ε湍流模型,通过动网格、滑移网格模拟柱塞移动及缸体的转动,UDF(User Defined Function)设置流体的可压缩性,建立水压轴向柱塞泵有限元计算模型。发现柱塞腔的空化程度与m值(柱塞腔直径与缸体腰形孔当量直径的比值)有很大关系,并建立不发生空化mc值的数学模型。经仿真分析发现:m值越小,柱塞腔中空化度越小。斜盘倾角β、缸体角速度ω越大,柱塞腔中不发生空化区域越小。通过研究,合理选择m值,可以减小柱塞腔的空化,减小柱塞泵的振动,提高柱塞泵容积效率,对轴向柱塞泵的设计具有实际意义。
The finite element calculation model of water axial piston pump is established by the mixture hybrid and RNG ^-c turbulence model of the Fluent software. The plunger movement and cylinder rotary are simulated by the dynamic mesh and sliding mesh. The UDF （User Defined Function） is used to set the compressibility of the fluid. It is found that the cavitation degree of plunger cavity is strongly related to m value （the ratio of the diameter of the plunger cavity to the equivalent diameter of the cylinder kidney shape hole）. The mathematical model of mc without cavitation value is established. Simulation results shows thatn the smaller the m value is, the smaller the cavitation degree of the plunger cavity is. The bigger the angle fl of the swash plate and the velocity co of the cylinder block are, the smaller the un-cavitation area in the plunger cavity is. It is demonstrated that a reasonable choice of m value can reduce the cavitation of plunger cavity and vibration of the piston pump, improve the volumetric efficiency of axial piston pump, which has practical meaning for the design of axial piston pump.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2018年第1期221-227,共7页
Journal of System Simulation
基金
国家重大科技专项(2010ZX04015-011)
四川省科技计划(2010GZ0093)
关键词
水压轴向柱塞泵
空化
动网格
滑移网格
water axial piston pump
cavitation
dynamic mesh
sliding mesh
作者简介
孙泽刚（1975-），男，四川资中，博士生，副教授，研究方向为液压CFD分析。
