Real-time online prediction method for life of fan

Abstract

The invention discloses a real-time online prediction method for the life of a fan. The real-time online prediction method for the life of the fan comprises the following steps: obtaining an environment temperature for the working of the fan in real time, taking a period of time delta t in a use process for the fan as a time period, and calculating an average working environment temperature Tuse of the fan in delta t; evaluating the life Lx of the fan at a corresponding temperature in one time period delta t; setting the life of the fan while leaving a factory and running for the first time tobe 1, calculating the percentage of one time period delta t in a whole life process according to the life Lx obtained in step 3, and subtracting the percentage occupying the whole life, of the previous time period, by the residual life after the time period to obtain the predicted residual life of the fan. According to the method, in the calculation process, the influence of the change of the environment temperature of the fan on the wear acceleration ratio of the life is adequately considered, and the residual life of the fan can be much accurately calculated in an occasion in which the working environment of the fan is changed. The percentage of the residual life of the fan can be calculated and displayed in real time, and a user can view the use condition of the fan in real time.

Description

technical field [0001] The invention relates to a method for predicting the life of a fan, in particular to a real-time online prediction method for the life of a fan. Background technique [0002] With the rapid development of industrial automation, the integration and power density of AC motion control systems and other large-scale electronic systems are getting higher and higher. The life and impact resistance of all electronic equipment or electronic devices are closely related to the ambient temperature. Heat dissipation naturally becomes A very important question for the system. Forced air cooling has the advantages of economy, reliability, ease of use and installation, and is widely used in various fields of industry. However, the fan that realizes forced air cooling also has a certain life cycle. If the fan cannot be replaced in time before it fails, it will inevitably reduce the overall The cooling capacity of the system will lead to a decrease in the life of the e...

AI Technical Summary

Problems solved by technology

This experiment is more complicated to implement and requires a long cycle. It is only an estimation of the actual life of the fan under a certain operating temperature, not a real-time calculation of its life; in fact, in many cases, the operation of the fan The environment changes in real time, and the life of the fan calculated by the above method cannot accurately reflect its changes with the ambient temperature in real time.

[0006] Chinese invention patent application document "Fan Life Alarm Method and Device" (publication number 101074966A) provides a method for judging fan life and failure according to the fan speed, but in the actual application process, the fan speed does not change with the fan life. It changes linearly or in a regular curve, and the failure of the fan includes various criteria such as the fan current, starting voltage, and noise. The speed of the fan cannot be simply used as the judgment of its life, but only as its Judgment of Failure and Malfunction

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