JPS5757232A - Vibration diagnosis of rotary machine - Google Patents

Abstract

PURPOSE:To improve reliability of a rotary machine by supervising axial vibration of the rotary machine and damping effectively the axial vibration when the vibration is big. CONSTITUTION:The signals detected by a vibration pick-up in the journal upper part of a bearing 5 are put into a vibrometer 7 to be converted into d digital quantity through an A/D converter 8, the digital signal is then delivered to a diagnosis device 9. In a data processing device 11 forming the core of the diagnosis device 9 the axial vibration data of an axial system are taken in to be registered in a memory device 12 for being processed according to the process instruction put in from a process instruction input device 14 to indicate in the indicator device 13. The content of the diagnosis consists in the execution of vibrarion diagnosis by combining those fundamental elements such as the balancing weight calculation for reducing axial vibrarion, vibrarion value calculation after adding a weight, synthesis of the vibration value and the quantity of the weight, an average of the vibrarion value and the weight quantity, extraction of a characteristic of the axial vibrarion and the comparison with a standard of judgement of vibration as the processing units.