Planetary Gearbox Vibration Signal Characteristics Analysis and Fault Diagnosis

Abstract EN

Planetary gearboxes are widely used in helicopters, wind turbines, mining machinery, and so forth.

The structure and motion type of a planetary gearbox are more complex in comparison with a fixed-shaft one, which makes condition monitoring and fault diagnosis of planetary gearbox a challenging issue in practical applications.

In order to understand the fundamental nature of planetary gearbox vibration, this paper conducts an investigation on vibration characteristics of a single-stage planetary gearbox.

Assuming that the gearbox and the sensor revolve inversely at the speed of planet carrier, the problem can be transformed into two easier parts: research on fixed-shaft gearbox signal model and research on influence of sensor spinning.

Based on this assumption, a vibration signal model of planetary gearbox is obtained.

Experimental data are used to validate the model.