Method and device for determining service life of bearing

Abstract

The embodiment of the invention discloses a method and a device for determining the service life of a bearing. Through load spectra comprising motor output torques under multiple different working time lengths under various working conditions, for a target working condition, an equivalent average load under the target working condition is calculated by using the motor output torque corresponding to each working time length, in combination with the current vibration load and the meshing load of the bearing, therefore the service life of the bearing is determined based on the equivalent averageload. In this way, due to the introduction of the motor output torques of different working time lengths under each working condition, the obtained equivalent average load not only considers the vibration load caused by the random irregularity of a wheeltrack, but also reflects the variable torque load transmitted from the motor, so that the calculated service life of the bearing is more accurate,and the operation conditions of the transmission system can be better determined, thereby improving the operation reliability of the transmission system.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a method and device for determining bearing life. Background technique [0002] Bearings, as an important part of the transmission system in mechanical equipment, are mainly used to support the mechanical rotating body, reduce the friction coefficient of the mechanical rotating body during motion, and ensure the rotation accuracy of the mechanical rotating body. For the entire transmission system, or even the entire mechanical equipment (such as rail transit trains), the life of the bearing is related to the efficiency and reliability of the entire transmission system and mechanical equipment. Therefore, if the life of the bearing can be accurately determined, there will be It is beneficial to effectively evaluate the use status of the transmission system and mechanical equipment. It should be noted that the bearing life can refer to the cumulative running time when the inner a...

AI Technical Summary

Problems solved by technology

[0003] However, for the bearings in the transmission system, at present, the calculation of its life is relatively general, and there is a certain deviation between the calculated life value and the actual life of the bearing, which leads to inaccurate judgments on the operating conditions of the transmission system including the bearing.

For example: for some special transmission systems, such as: the bearing of the bogie gearbox, due to its special service characteristics - it must not only bear the variable torque load from the motor, but also bear the vibration caused by the random unevenness of the wheel and rail. Loads, therefore, it is very difficult to accurately calculate the life of the bearings in the bogie gearbox

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