System and method for monitoring unbalance loading of planet gears of wind turbine generator system

Abstract

The invention relates to a system and method for monitoring unbalance loading of planet gears of a wind turbine generator system. A gearbox of the wind turbine generator system comprises a sun gear, the planet gears and an annular gear. The method includes the following steps of installing an acceleration sensor on the annular gear, determining the absolute zero positions, when the planet gears arrive at the absolute zero positions, enabling the acceleration sensor to start collecting data and collecting phase angle signals at the same time, determining the meshed areas of the planet gears and the annular gear, calculating the impact energy in the meshing process, obtaining differences between the magnitudes of impact energy of all the planet gears, and confirming that unbalance loading happens to the planet gears if any difference value exceeds a limiting value. The system comprises the acceleration sensor arranged on the annular gear, and a signal collection and data processing system connected with the acceleration sensor. The system and the method overcome the defect that the unbalance loading phenomenon can not be monitored in the running process of the planet gear train of the wind power gear box, and solve the problems that damage to the planet gears and a bearing is accelerated when unbalance loading happens to the planet gears and the planet gears are not timely repaired.

Description

technical field [0001] The invention relates to the field of monitoring parts of a wind power generating set, in particular to a monitoring system and method for an eccentric load of a planetary gear of a wind generating set. Background technique [0002] Because planetary gear transmission has the advantages of compact structure and high transmission power density, most of the main gearboxes of wind turbines currently use planetary gear transmission, and most of them use a transmission form in which the inner ring gear is fixed and the cage drives the planetary gear to rotate. However, planetary gear transmission requires high machining accuracy and installation accuracy of the planetary gear train. In the actual application process, due to various precision errors and deformations, the planetary gear train often has uneven load distribution, that is, the phenomenon of partial load. The eccentric load within a certain range has little effect on the life of the gearbox, but ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a monitoring system and method for the eccentric load of the planetary gear of the wind power generating set, so that it can monitor the fault of the eccentric load of the planetary gear so as to maintain the planetary gear in time, thereby overcoming the existing planetary gear of the wind generating set. Undetectable gear eccentric load and high maintenance costs

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