METHOD AND ASSEMBLY FOR STATE MONITORING OF A BEARING THAT SUPPORTS A PLANETARY GEAR OF A PLANETARY TRANSMISSION ON A PLANET CARRIER

摘要

A method for state monitoring a bearing that supports a planetary gear of a planetary transmission on a planet carrier, the method including measuring a structure-borne noise of the planetary transmission at a stationary position on the planetary transmission in order to generate a digital measurement signal having a sample value at at least one sample time point, determining a relative speed of the planetary gear with respect to the stationary position for the sampling time point, determining a corrected measurement signal, the corrected measurement signal including the sample value with a corrected sample time point, the corrected sample time point being shifted with respect to the sample time point based on the relative speed, forming an envelope-curve signal based on the corrected measurement signal, determining a frequency spectrum for the envelope-curve signal, and comparing the frequency spectrum with a reference spectrum in a given frequency range.

主权项

1. A method for state monitoring of a bearing that supports a planetary gear of a planetary transmission on a planet carrier, the method comprising:
measuring a structure-borne noise of the planetary transmission at a stationary position on the planetary transmission in order to generate a digital measurement signal, wherein the digital measurement signal has a sample value at at least one sample time point; determining a relative speed of the planetary gear with respect to the stationary position for the sampling time point, determining a corrected measurement signal, wherein the corrected measurement signal includes the sample value with a corrected sample time point, the corrected sample time point being shifted with respect to the sample time point based on the relative speed; forming an envelope-curve signal based on the corrected measurement signal; determining a frequency spectrum for the envelope-curve signal; and comparing the frequency spectrum with at least one reference spectrum in a given frequency range, wherein the given frequency range is based on a frequency of rotation of the planetary gear about the planet carrier, and on a geometry of the bearing.