DEVICE FOR PREDICTING DESTRUCTION OF BEARING OF PRINCIPAL AXIS

摘要

PPROBLEM TO BE SOLVED: To predict breakdown of the roller bearing of the main axis of a working machine, without having to use expensive FFT, and to implement a decision concerning stop/maintenance of the machine without waste. PSOLUTION: The device 1 for predicting breakdown includes a power signal output device 10 for squaring the output signal of an acceleration detector 2, mounted on an outer cylinder of the bearing of the main axis of the working machine in a multiplication circuit 16, after passing frequency filters 14, 15; and then the output signal is squared by the circuit 16 and integrated by an integrating circuit 17 to generate power signal; a monitoring device 30 for notifying by a notifying means 34, when the number of times that a minimum value of reading each 2 seconds is larger than the threshold reaches a predetermined number and also, storing/retaining a maximum value of reading during operation of a day, the number of times that a minimum value of reading each 2 seconds is larger than the threshold; and an operation time together with the date as history information to then made to be read to the external personal computer, as necessary. PCOPYRIGHT: (C)2007,JPO&INPIT