运行过程中转速变化时可倾瓦推力轴承油膜温度瞬态变化规律的实验研究

Experimental Study of Transient Variation of the Temperature of Oil Film of Tilting-pad Thrust Bearings with the Rotation Speed Alteration during the Operation Process

本文实验研究了可倾瓦推力轴承在运行过程中的不同载荷下、不同升速时间下从起始转速 80 0r/min升到截止转速 5 0 0 0r/min时油膜温度和油膜厚度变化值的瞬态变化规律。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 -康铜热电偶和电涡流传感器。实验表明 :在运行过程中 ,转速升高时 ,不同的升速时间对油膜温度、进油边温度、出油边温度以及油膜厚度变化值的影响基本相同 ;不同载荷对油膜温度、进油边温度以及出油边温度的影响基本相同 ,但不同载荷对油膜厚度变化值的影响却不一样 ,载荷越大 ,油膜厚度变化值就越大 ;载荷越小 ,油膜厚度变化值就越小。

In this paper, the transient thermal effects of a tilting-pad thrust bearing in the processes of operation with different carrying-loads and disparate raising speed times from initial rotation speed 800r/min to terminal rotation speed 5000r/min have been experimentally investigated In the tests, a number of copper-constantan thermocouples and electrical eddy current sensor are placed at the inlets and the outlets of the pads, and the interface between the oil film and the pad The experimental results indicate that on operation progress, when the rotational speed is raised, different raising times have the same effect on the temperature of oil film, the temperature of the inlets and outlets of the pads, and the varying value of the mean oil film thickness And also disparate carrying-loads have the same effect on the temperature of oil film and the temperature of the inlets and outlets of the pads, but have different effect on the varying value of the mean oil film thickness The varying value of the mean oil film thickness increases with the increase of the carrying-loads, and the varying value of the mean oil film thickness decreases with the decrease of the carrying-loads