时变路径行星齿轮箱太阳轮故障响应周期特性

Fault Response of Sun Gear in Time Varying Path Planetary Gearbox Periodic Characteristics

针对时变路径特性对太阳轮故障啮合响应的周期性影响,求证能够表征太阳轮不同故障类型的数据长度。首先,将特定位置传感器作为太阳轮故障啮合周期性变化的观测点,以太阳轮与行星架转速比为切入点,根据行星轮之间是否存在差异分类,分别推导出同齿啮合周期和准同齿啮合周期的表达式,并证明两者之间的关系;其次,依据推导周期及其倍数截取太阳轮不同类型故障信号,取其特征建立3维空间对故障类型进行分离。结果表明:1倍同齿啮合周期是表征太阳轮不同类型故障的最小长度;2倍同齿啮合周期是表征太阳轮不同类型故障的最佳长度。借助太阳轮故障啮合响应周期特性,能够实现太阳轮不同类型故障的诊断。

This paper focuses on the periodic influence of time-varying path characteristics on the fault meshing response of the sun gear,and verifies the data length that can characterize different fault types of the sun gear.The position sensor is used as the observation point of the periodic variation of the fault engagement of the sun gear,taking the speed ratio of the sun gear and the planet carrier as the starting point,and whether there is a difference classification between the planet gears,the expressions of the meshing period of the same gear teeth and the meshing period of quasi-identical gear teeth are derived respectively,and the relationship between them is proved.According to the derivation period and its multiple,different types of fault signals of the sun gear are intercepted,and the characteristics are taken to establish a three-dimensional space to distinguish the fault types.The results show that one time of the meshing period of the same gear teeth is the minimum length to represent different types of faults of the sun gear,and two times of the meshing period of the same gear teeth is the best length to represent different types of faults of the sun gear.With the help of the periodicity of the meshing response of the sun gear fault,the diagnosis of different types of faults of the sun gear can be realized.