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针对重复使用液体火箭发动机涡轮泵,设计了试验用流体静压轴承,利用不可压层流润滑雷诺方程的线性性质,对轴承液膜压力进行数值求解,计算分析了分别采用水和液氮作为润滑介质时,轴承的承载力和流量特性与偏心率和供给压力的关系;进行了轴承的节流孔流量特性和水润滑试验。结果表明:静压轴承短孔(非典型小孔)节流器的流量系数远超出常用的小孔节流器流量系数的参考范围;在研究的相同工况下,计算得到的水润滑和液氮润滑静压轴承的质量流量相差很小;高速水润滑试验中,主轴在轴承中浮起后的位置主要由供给压力决定,在0~30000 r/min的转速范围内轴承没有明显的动压效应;计算和试验结果均表明静压轴承的质量流量与偏心率基本无关。水和液氮润滑静压轴承性能计算和水润滑试验结果为进一步的液氮低温润滑试验奠定了基础。
For the reutilization of liquid propellant rocket engine turbo pump, hydrostatic test bearing was designed. By using the linear nature of the incompressible laminar flow lubrication Raynaud’s equation, the liquid film pressure of the bearing was numerically solved. The effects of water and liquid nitrogen as lubrication Bearing capacity and flow characteristics of bearings and eccentricity and supply pressure relationship; carried out the bearing orifice flow characteristics and water lubrication test. The results show that the flow coefficient of the hydrostatic bearing short hole (atypical small hole) choke far exceeds the reference range of the commonly used small hole choke flow coefficient. Under the same working conditions, the calculated water lubrication and liquid In the high-speed water lubrication test, the position of the main shaft after being floated in the bearing is mainly determined by the supply pressure, and there is no obvious dynamic pressure at the speed range of 0-30000 r / min Effect; calculation and test results show that hydrostatic bearing mass flow and eccentricity has nothing to do. Water and liquid nitrogen lubrication Hydrostatic bearing performance calculation and water lubrication test results for the further liquid nitrogen low temperature lubrication test laid the foundation.