共查询到20条相似文献,搜索用时 93 毫秒
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计及油腔在内,本文采用迭代近似解法,导出了考虑流动惯性和离心惯性的静压推力轴承的压力、流量和承载能力解析计算公式,为该轴承的设计提供了新的理论基础。 相似文献
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:通过实验 ,研究了可倾瓦推力轴承在空载快速启动及慢速启动过程中油膜温度的瞬态变化规律 ,探讨了加载时载荷变化、转速变化及转速变化率等因素对推力轴承油膜温度的影响。实验时 ,在瓦块进油、出油边及油膜与瓦块接触面上布置了若干根铜 -康铜热电偶 ,并选用了英国施伦伯杰公司的 IMP分布式数据转换器与一台主频为16 6 MHz的计算机组成了动态温度、油膜厚度数据采集系统。实验表明 :油膜温度变化速度并不如现有的关于数值计算的文献报导的迅速。转速或载荷增大时 ,油膜温度上升 ,油膜厚度减小 ,但是转速变化对油膜瞬态温度的影响要比载荷的影响大。值得注意的是 ,在一定载荷下 ,转速增加时 ,油膜温度首先上升 ,到达峰值后逐渐下降。 相似文献
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Tilting pad thrust bearings are a key component of marine propulsion shaft systems. The dynamic performance of thrust bearings has a significant influence on the propeller vibration. To investigate the axial oil film stiffness of tilting pad thrust bearings, a two-dimensional thermohydrodynamic model incorporating the vibration frequency is developed. The test apparatus and experimental identification model are also constructed. The axial oil film stiffness is experimentally identified at different speeds, loads, and temperature employing the hammer impulse excitation. The axial oil film stiffness between theoretical and experimental results is compared. The discrepancies are not more than 7% for 30 kN operation cases but increase with axial static load. This is partially because the influence of the pivot stiffness becomes obvious with the axial static load increase and cannot be ignored. The results indicate that axial oil film stiffness is at a magnitude of 109 N·m?1. Compared to foundation stiffness of the thrust bearing system, the influence of axial oil film stiffness needs to be considered for bearing–rotor system design of marine propulsion systems in engineering practice. 相似文献
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Performance enhancements by laser surface texturing (LST) of parallel-thrust bearings is experimentally investigated. Test results are compared with a theoretical model and good correlation is found over the relevant operating conditions. A comparison of the performance of unidirectional and bi-directional partial-LST bearings with that of a baseline, untextured bearing is presented showing the benefits of LST in terms of increased clearance and reduced friction. 相似文献
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应用Fluent软件对小孔节流气体静压止推轴承进行了三维流场的模拟计算,分析了节流孔孔径、节流器工作面积、气源供气压力等因素对气体静压轴承性能的影响。结果表明:止推轴承的承载能力随着节流孔直径的增大而增大,在气膜间隙较小时,刚度随着节流孔孔径增大而减小,在气膜间隙较大时,刚度随着节流孔孔径的增大而增大;在保证加工精度的前提下,增大节流器工作面尺寸,以及在保证气源供气连续的前提下,增大气腔供气压力,都可以显著地改善止推轴承的静态性能。在自行研制的实验平台上进行气体静压实验,实验结果与数值模拟计算结果具有较好一致性,证明了将该数值计算方法的可行性。 相似文献
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水润滑石墨推力轴承是影响屏蔽泵可靠寿命的关键部件,本文依据可靠性理论,导出了水润滑石墨推力轴承可靠寿命的数学模型,并通过屏蔽泵水润滑石墨推力轴承的寿命试验数据对模型中的参数进行了估算,此研究成果对水润滑轴承可靠寿命预测及设计计算具有普遍的指导意义. 相似文献
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本文介绍了用振动监测诊断技术对某艇主轴承的振动进行测试分析的情况,结果表明诊断结论与实际拆检结果相同。提出了监测点的选择及分析信号时应注意的问题。 相似文献