Experimental investigation of load carrying capacity and frictional torque of dimpled parallel thrust bearings
Experimental investigation of load carrying capacity and frictional torque of dimpled parallel thrust bearings
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DOI：
10.1299/jamdsm.2020jamdsm0041
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发表时间：
2020-01-01
影响因子：
0.9
通讯作者：
Tomioka, Jun
中科院分区：
文献类型：
--
作者：
Miyanaga, Norifumi;Kishida, Terunao;Tomioka, Jun
实验研究了压痕平行推力轴承的流体动力润滑性能。在润滑表面形成圆形和矩形凹窝，并对其流体动力效应进行了评价。在一定的膜厚条件下，测量了膜的承载能力和摩擦力矩。通过对润滑表面的观察，明确了空化面积对承载能力和摩擦力矩的影响。在所有测试条件下，圆形凹窝产生最高的承载能力。在较高的转速下，各裂纹试样的摩擦力矩均小于无裂纹试样。在较低转速下，没有出现空化现象，也没有产生承载能力。随着转速的增加，每个凹窝的前缘出现空化现象，空化面积的增长与凹窝的形状有关。在实验转速下，圆形韧窝的空化尺寸保持不变，而矩形韧窝的空化尺寸呈线性增加。
This study involves experimental investigations of the hydrodynamic lubrication performance of dimpled parallel thrust bearings. Circular and rectangular dimples were created on lubricating surfaces and the hydrodynamic effects were evaluated. The load carrying capacity and the frictional torque were measured at a constant film thickness. The lubricating surface was observed to make clear the effect of the cavitation area on the load carrying capacity and the frictional torque. The circular dimple produced the highest load carrying capacity in all experimental conditions tested. The frictional torque for all dimpled specimens was lower than that of the dimple-free specimen especially at higher rotational speed. At lower rotational speed, cavitation did not appear and also the load carrying capacity did not generate. Cavitation emerged at the leading edge of each dimple as the rotational speed increased, and the growth of its area was dependent on the shape of dimples. The cavitation size of the circular dimple remained constant at the rotational speeds used in the tests, whereas those of the rectangular dimples linearly increased.