通过在低速大扭矩水压马达配流盘上设计不同凹坑形仿生非光滑表面,并建立配流副的全水动压润滑模型,基于湍流理论,利用 Fluent 软件研究仿生非光滑表面对低速大扭矩水压马达配流副液膜表面压力分布、承载力的影响。研究表明: 对于低速大扭矩水压马达配流副,在相同凹坑深度和运动速度的条件下,凹坑壁面与液膜表面接触角为锐角时的液膜表面承载力要大于其为直角时的液膜表面承载力;在转速一定时,深度对圆形锥坑的液膜表面承载力的影响很小,在边界润滑的情况下,通过适当增大凹坑深度,可以防止较浅的凹坑由于磨损严重而导致的失效。
Abstract
In order to research the effect of the liquid surface pressure distribution and load-carrying capacity of the bionic non-smooth surface in the low-speed and high-torque hydraulic motor’s valve plate. Different bionic non-smooth surface and full water flow deputy hydrodynamic lubrication model in the low-speed and high-torque hydraulic motor’s valve plate were designed, and the liquid surface pressure distribution and load-carrying capacity of the bionic non-smooth surface was investigated based on turbulence theory and by the Fluent software. The results show that with the decrease of the angle between the pit wall and the film surface, the liquid surface load-carrying capacity are increased. Under the same velocity condition,the depth of conical pit did not affect the liquid surface load-carrying capacity. In the case of boundary lubrication, by appropriately increasing the depth of the pit to prevent failure of shallow pits badly worn.
关键词
低速大扭矩水压马达 ;
仿生非光滑表面 ;
配流盘 ;
CFD仿真
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Key words
low-speed and high-torque hydraulic motor ;
bionic non-smooth surface ;
valve plate ;
CFD Simulation
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