Fatigue Strength Evaluation of Reduction Gear for Korea High-Speed Train

초록

The reduction gear unit is one of the most important components for the railway vehicle because of transmitting the torque of motor to the wheels. Reduction gear is not only exposed frequently fatigue and impact by existing railway rails has but also problem such as faulty assembly and mixing foreign object in manufacturing processes. The wear and micro-crack occur due to those issues in parts of reduction gear such as output gear and input gear. As a result, failure of reduction gear has caused delay and suspension of the service operating. In this paper, to clarify the strength of reduction gear for Korea high-speed train, a bending fatigue test is performed for the output gear of axle gear reduction unit. This paper reports the reviews of bending fatigue strength test method and the test results of output gear of axle gear reduction unit for Korea high-speed train.