Dynamic Characteristic Analysis And Structure Optimization For The Hydrostatic Bearing Of Turbopump

The advanced aerospace launch confidential demand the turbopump has the high efficiency, the light quality and the small size. The bearings, a key part of the turbine pump, the quality of whose work function is an important factor affecting the turbine pump life span. Under the traditional bearings can't satisfy turbine pump's high request work, all countries have to look for a higher speed, longer life, high reliability bearing to substitute the traditional machine bearings. The liquid hydrostatic bearings have the advantages of small friction, the high speed, the good anti-vibration, the higher rigidity and an ability of avoidancing the tangency of axes and bearings, which satisfy the high request of the turbine pump. Mainly in this text we make the numerical simulation to the hydrostatic bearings, studying the influence of the performance in different parameters.The following essay analyzes the hydrostatic bearing's working principle, types and main performance parameters, studies the hydrostatic bearing's load capacity and oil film rigidity. Simultaneously, it introduces the calculation principle and structure of CFD software Fluent. According to the angle of CFD, it introduces the work process and its advantages and disadvantages of CFD software. It makes the foundation for the following work of hydrostatic bearing's simulation through the understanding of above.According to the hydrostatic bearing's structure and geometric sizes, this paper sets up a mathematical model.And then, meshing the model, specifying boundary Condition and proving simulation calculation are completed according to the model's characteristics. After that, we can get the fluxion condition of the static pressure bearings, including the pressure distribution, velocity distribution and the pressure variety within inner special points and so on. According to the results of numerical simulation, this paper still analyzes the hydrostatic bearing's load capacity and oil film rigidity in different speeds, oil pressure, deflection rate, diameters of throttle orifice and the oil film thickness. Also the paper carries out optimizing design to the bearing's structure.