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首页> 外文期刊>Journal of Advanced Mechanical Design, Systems, and Manufacturing >Study on high-speed traction drive CVT for aircraft power generation - Gyroscopic effect of the thrust ball bearing on the CVT -
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Study on high-speed traction drive CVT for aircraft power generation - Gyroscopic effect of the thrust ball bearing on the CVT -

机译：飞机发电用高速牵引驱动无级变速器的研究-推力球轴承对无级变速器的陀螺效应-

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The traction drive - integrated drive generator (T-IDG?) has been developed since 1999 to replace current hydrostatic transmission drive generators mounted on Japanese military aircrafts. The T-IDG? consists of a generator and a half-toroidal traction-drive continuously variable transmission (CVT), which maintains a constant output speed of 24,000 rpm. In terms of coping with recent trends of high-power electric drive aircraft (MEA) and the need for weight reduction, a high-speed traction-drive CVT is advantageous over current hydro-static drive transmissions. The high-speed half-toroidal CVT has a fundamental issue regarding the thrust ball bearing, which must support a large loading force at a high rotational speed. The gyroscopic effect of the thrust ball bearing causes a serious slip called gyroscopic sliding at the insufficient preload and it damages the bearing. This paper describes the theoretical criteria and the design method for suppressing gyroscopic sliding. The test to validate the theory is also conducted with a prototype T-CVT up to 20,000 rpm with a peripheral speed of the traction contact of 70 m/s.
机译：自1999年以来，就已经开发了牵引驱动-集成驱动发电机（T-IDG？），以取代目前安装在日本军用飞机上的静液压传动驱动发电机。 T-IDG？由发电机和半环形牵引驱动无级变速器（CVT）组成，可保持24,000 rpm的恒定输出速度。就应付大功率电动飞机（MEA）的最新趋势和减轻重量的需求而言，高速牵引驱动CVT优于目前的静液压驱动变速器。高速半环形CVT有一个关于推力球轴承的基本问题，推力球轴承必须在高转速下承受较大的加载力。推力球轴承的陀螺效应会导致在预紧力不足的情况下发生严重的滑动，称为陀螺镜滑动，并会损坏轴承。本文介绍了抑制陀螺滑动的理论标准和设计方法。还使用高达20,000 rpm的T-CVT原型进行了验证该理论的测试，牵引接触的圆周速度为70 m / s。

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