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Oxygen compressor as a mechanical energy is converted to the power unit of the oxygen pressure can be applied in the industrial production of very broad, and its too large power consumption has become an issue of concern. Accounted for in the total power consumption of the oxygen compressor, a main part of the friction power of the spindle, the spindle supports of existing oxygen compressor main use of split plain bearings, due to the mating surfaces of the spindle and the sliding bearing is basically in the mixed friction or The boundary friction state, resulting in large friction power loss, and reduces the life of the bearing. The hydrostatic bearing virtue of it sports high accuracy, low coefficient of friction and drive power, long working life, good stability, can be a good solution to this problem. In this paper, the study on the crankshaft with a split the hydrostatic bearing structure and design of the throttle, the transformation of a large oxygen compressor sliding bearing. Firstly, according to the structure of a crankshaft of the oxygen compressor, determine the basic structure of the hydrostatic bearing, and the various design parameters, analyzes the change in the diameter of the orifice of the hydrostatic bearing design gap, due to space limitations identified distinct apertures throttle bearing stiffness and friction power loss. Next, in the same design parameters based on the calculated comparison Rolling and hydrostatic bearings of three plain bearings, bearing friction power. Then, using the finite element software ANSYS / CFX, established a model of the static pressure of the oil film in the same boundary conditions based on the finite volume method to simulate and analyze the flow field of film, by changing the the bearing structural parameters and working parameters, calculation and analysis of oil film pressure distribution and velocity distribution of flow lines. Finally, the experimental analysis, simulation of the hydrostatic bearing thin-walled holes, by changing the length of the aperture and holes, pore size and length of the traffic through the holes, Orifice Compensated design calculations are more accurate. Shaped like a crankshaft in such a complex support structure according to the analysis results obtained, using the form of orifice restrictor, not only in structure, easy to implement, and, if properly designed, can still obtain the good performance of the lubrication, stiffness. Analysis calculated the relationship between the diameter and the friction power and the support stiffness of the restrictor orifice, the optimum pore diameter. Not only can get higher support stiffness, and friction power loss is also smaller. Of plain bearings, rolling bearings and the hydrostatic bearing friction power calculation, obtained the hydrostatic bearing friction power loss of the three forms of support in the smallest conclusions, and provide an important basis for the hydrostatic bearing to replace plain bearings. In the case of the same boundary conditions and solution parameters, the small diameter of the oil film pressure is larger than the diameter of the oil film pressure, i.e. the load carrying capacity of a small diameter orifice is larger than the large diameter of the orifice carrying capacity. Flow experiments, the flow rate of the oil chamber of the orifice compensation form bearing is not only associated with the orifice diameter, while the length of the orifice also has important implications.
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