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首页> 外文期刊>Journal of Tribology >An Experimental Study of Static and Dynamic Characteristics of a 580 mm (22.8 in.) Diameter Direct Lubrication Tilting Pad Journal Bearing
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An Experimental Study of Static and Dynamic Characteristics of a 580 mm (22.8 in.) Diameter Direct Lubrication Tilting Pad Journal Bearing

机译：直径580毫米（22.8英寸）的直接润滑倾斜垫轴颈轴承的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 500 mm. In this paper, static and dynamic characteristics of a 580 mm (22.8 in.) 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 2.9 MPa. The maximum metal temperature of the DLTPJ bearing was compared to that of a conventional flood lubrication bearing, and it was confirmed that the direct lubrication could 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, a Rayleigh-step was machined there, and it was confirmed that vibration was reduced by the Rayleigh-step.
机译：直接润滑式可倾瓦轴颈轴承（DLTPJ轴承）很少用于轴颈直径大于500 mm的大型旋转机械，例如涡轮机或发电机。在本文中，使用全尺寸轴承试验台通过实验研究了直径580毫米（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，平均轴承压力高达2.9 MPa。将DLTPJ轴承的最高金属温度与传统的泛油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，通过使空气波纹管浮动的轴承箱受激，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，由于在一些实际的机器中已经发现由于振动而导致上垫上的金属损坏，所以对垫的振动进行了研究。为了在上垫的表面上产生油膜压力，在那里进行了瑞利台阶的加工，并确认了通过瑞利台阶减小了振动。

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