Experimental investigation has been done to evaluate the leakage performance of labyrinth seal for oil sealing on high-speed sealing test rig at different working and geometric parameters. Typical values of pressure ratio ranging from 1.0 to 2.0 were used and the rotating speed varied from 0 to 30,000 rpm. Dimensionless Taylor number was invited to response the effect of rotation. Oil was injected at the rate from 1.2 L/min to 2.8 L/min to check the sealing capacity. Leakage was measured at different seal configurations including sealing clearance, tooth tip thickness, pitch, teeth number, front inclined angle and oil-throwing angle. Different from gas sealing, the application of oil-throwing tooth in oil sealing attracted much interest as an obvious alternative to the conventional labyrinth seal. A blocking ring was captured during testing, which establishes understanding of underlying flow mechanisms in the clearance and plays an important role in oil sealing. There is a critical Taylor number at which the leakage coefficient drops drastically. After the critical Taylor number, a parabola rule appears. An optimal composition of tooth tip thickness, teeth number, oil-throwing angle and front inclined angle exists where the leakage performance behaves better.

在高速密封试验台上，在不同的工作参数和几何参数下，已经进行了实验研究，以评估迷宫式油封的泄漏性能。使用的压力比的典型值为1.0到2.0，旋转速度为0到30,000 rpm。邀请无量纲泰勒数响应旋转的影响。以1.2 L / min至2.8 L / min的速度注入油以检查密封能力。在不同的密封配置下测量泄漏，包括密封间隙，齿尖厚度，节距，齿数，前倾斜角和抛油角。与气体密封不同，在传统的迷宫式密封中，抛油齿在油封中的应用引起了广泛的关注。在测试过程中捕获了一个挡圈，它建立了对间隙中潜在流动机制的了解，并在油封中起着重要作用。存在一个临界泰勒数，泄漏系数会急剧下降。在临界泰勒数之后，出现抛物线规则。存在一个最佳的齿尖厚度，齿数，抛油角和前倾斜角的组合，在这种情况下泄漏性能更好。