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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >AN EXPERIMENTAL STUDY OF STATIC AND DYNAMIC CHARACTERISTICS OF A 580MM (22.8IN.) DIAMETER DIRECT LUBRICATION TILTING PAD JOURNAL BEARING
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AN EXPERIMENTAL STUDY OF STATIC AND DYNAMIC CHARACTERISTICS OF A 580MM (22.8IN.) DIAMETER DIRECT LUBRICATION TILTING PAD JOURNAL BEARING

机译：580毫米（22.8英寸）直径直接润滑倾斜垫垫轴承静态和动态特性的实验研究

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摘要

Direct lubrication tilting pad journal bearings (DLTPJ bearings) have rarely been applied to large scale rotating machinery, such as turbines or generators whose journal diameters are more than 500mm. In this paper, static and dynamic characteristics of a 580mm (22.8in.) diameter DLTPJ bearing were studied experimentally using a full scale bearing test rig. In the static test, distribution of metal temperature, oil film pressure and bearing loss were measured in changing oil flow rate, with mean bearing pressure ranging up to 2.9MPa. Maximum metal temperature of DLTPJ bearing was compared to that of conventional flood lubrication bearing, and it was confirmed that the direct lubrication can increase load capacity. In the dynamic test, spring and damping coefficients of oil film were obtained by exciting the bearing casing that was floated by air bellows. These data will be used for analysis and design of steam turbine rotors and their bearing systems. Also, vibration of pads was investigated, because metal failure on upper pads due to vibration has been found in some actual machines. In order to generate oil film pressure on the surface of upper pads, Rayleigh-step was machined there. And it was confirmed that vibration was reduced by Rayleigh-step.
机译：直接润滑的可倾瓦轴颈轴承（DLTPJ轴承）很少用于大型旋转机械，例如轴颈直径大于500mm的涡轮机或发电机。在本文中，使用全尺寸轴承试验台通过实验研究了直径580mm（22.8英寸）的DLTPJ轴承的静态和动态特性。在静态测试中，在变化的油流量下测量了金属温度，油膜压力和轴承损耗的分布，平均轴承压力范围为2.9MPa。将DLTPJ轴承的最高金属温度与常规油浸润滑轴承的最高温度进行了比较，并证实了直接润滑可以提高负载能力。在动态测试中，通过使由空气波纹管浮起的轴承箱受激，可以获得油膜的弹簧系数和阻尼系数。这些数据将用于汽轮机转子及其轴承系统的分析和设计。另外，还对垫片的振动进行了研究，因为在某些实际机器中已经发现由于振动而导致上垫片的金属损坏。为了在上垫的表面上产生油膜压力，在此处加工了瑞利台阶。并且证实了通过瑞利阶跃减小了振动。

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