核电循环泵齿轮箱强制喷射润滑仿真研究

Simulation Study on Injection Lubrication of Nuclear Power Circulating Pump Gearboxes

通过合理简化核电循环泵齿轮箱的三维模型,采用运动粒子半隐式方法对核电齿轮箱强制喷油润滑流场进行仿真模拟,精确、快速地获取齿轮箱内部复杂流场运动状态,研究了喷油角度、供油压力等喷射参数对箱体内油液流动特性的影响;分析了内、外啮合区域附近油液粒子的参数变化以及油液分布对行星齿轮润滑行为的影响机制。结果表明,高速粒子主要集中于外啮合区域,低速粒子主要分布在齿圈表面以及内啮合区域;喷射参数对内、外啮合区粒子流动性的影响不同,强制润滑的优化设计需协同考虑不同区域的润滑特性。

By reasonably simplifying the three-dimensional model of the gearbox of the nuclear power circulating pump,a moving particle semi-implicit method is used to simulate the forced oil injection lubrication flow field of the nuclear power gearbox.The movement state of the complex flow field inside the gearbox is accurately and quickly obtained.The effects of the injection angle,the oil supply force and other injection parameters on the oil flow characteristics in the gearbox are studied;the parameter changes of oil particles near the inner and outer meshing areas and the influence mechanism of oil distribution on the lubrication behavior of planetary gears are analyzed.Results show that high-speed particles are concentrated in the outer meshing region,while the low-speed particles are mainly distributed on the surface of the ring gear and the inner meshing region.The effects of injection parameters on particle fluidity in inner and outer meshing regions are different.The optimization design of forced lubrication shall take into consideration of the lubrication characteristics of different areas.