Characteristic parameter-based method for condition monitoring and fault identification of planetary gearbox

Abstract

The invention discloses a characteristic parameter-based method for the condition monitoring and the fault identification of a planetary gearbox. According to the characteristic parameter-based method, two characteristic parameters, i.e. filtered root mean square (FRMS) and difference spectrum energy (DSE), are proposed, the running condition of the planetary gearbox is monitored respectively through a time domain and a frequency domain due to the two characteristic parameters, and the fault of the planetary gearbox is finally identified by combining the time domain with the frequency domain. The characteristic parameter-based method has the advantages that: the two characteristic parameters are proposed aiming at the problem of fault diagnosis of the planetary gearbox, the defects that the traditional parameters, such as root mean square, kurtosis, FM0, FM4 and the like, for the condition monitoring of a fixed-axle gearbox cannot used for effectively monitoring the running condition of the planetary gearbox, are overcome, and thus, the condition monitoring and the fault identification of the planetary gearbox can be accurately achieved.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of mechanical equipment, and relates to a method for state monitoring and fault identification of a planetary gearbox based on characteristic parameters, which can accurately monitor the operating state of the planetary gearbox and effectively realize fault identification of the planetary gearbox. Background technique [0002] Planetary gearbox has many advantages such as light weight, small size, large transmission ratio, strong carrying capacity and high transmission efficiency, so it has been widely used in machinery in wind power generation, aviation, shipbuilding, metallurgy, petrochemical, mining, lifting and transportation, etc. transmission system. Planetary gearboxes usually work in harsh environments with low speed and heavy loads, so failures such as severe wear and fatigue cracks of key components such as sun gears, planetary gears, ring gears and planetary carriers occur from time to ti...

AI Technical Summary

Problems solved by technology

Therefore, the gear movement in a planetary gearbox is a typical compound movement, and its vibration response is more complex than that of a fixed-axis transmission gearbox. The corresponding fault diagnosis problem has its own characteristics and difficulties.

Therefore, some characteristic parameters used for fixed-axis gearboxes cannot effectively monitor the condition and identify faults of planetary gearboxes.

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