초록 ▼

A method of symptom diagnosis by continuously detecting vibration of the shaft of a rotary machine and monitoring a signal indicative of detected shaft vibration for the diagnosis of the operating condition of the rotary machine. In the method, a symptom of unusual operation of the rotary machine is

A method of symptom diagnosis by continuously detecting vibration of the shaft of a rotary machine and monitoring a signal indicative of detected shaft vibration for the diagnosis of the operating condition of the rotary machine. In the method, a symptom of unusual operation of the rotary machine is diagnosed. The rotation speed range of the rotary machine is classified into a safety region, an alarm region and a trip region depending on the level of the shaft vibration signal. According to the disclosed method, symptom diagnostic regions are established within the safety region at time intervals of a symptom diagnostic period, and whether or not the level of the detected shaft vibration signal deviates from that of the symptom diagnostic regions is continuously monitored for the diagnosis of a symptom of unusual operation of the rotary machine.

대표청구항 ▼

A method of symptom diagnosis by continuously detecting vibration of the shaft of a rotary machine and monitoring a signal indicative of the detected shaft vibration for the diagnosis of the operating condition of the rotary machine, said method comprising: establishing a predetermined safety region

A method of symptom diagnosis by continuously detecting vibration of the shaft of a rotary machine and monitoring a signal indicative of the detected shaft vibration for the diagnosis of the operating condition of the rotary machine, said method comprising: establishing a predetermined safety region in which said detected shaft vibration signal is indicative of a relatively low level permitting continuous operation of the rotary machine; monitoring the behaviour of said detected shaft vibration signal within said safety region; and determining the presence of a symptom of unusual operation of the rotary machine on the basis of the result of monitoring of the behaviour of said detected shaft vibration signal within said safety region.