Abnormality detection device, difference vector display device, rotary machine system, abnormality detection method, and program

A difference vector display device comprising:

• a vibration measurement value acquisition unit configured to acquire a measurement value of vibration of a rotation shaft for each rotation angle of the rotation shaft, the measurement value being measured by each of a plurality of shaft vibration sensors, the plurality of shaft vibration sensors being provided to be spaced apart in a diameter direction of the rotation shaft with respect to an outer circumferential surface of the rotation shaft and being provided to be spaced apart in a shaft direction of the rotation shaft;
• a vibration vector calculation unit configured to calculate a vibration vector, the vibration vector indicating a rotation angle at which vibration of the rotation shaft is a maximum and a magnitude of the vibration on the basis of the measurement value of the vibration;
• a difference vector calculation unit configured to calculate a difference vector indicating a time change in the vibration vector;
• and
• a display unit configured to display the difference vector.

A rotary machine system comprising:

• a rotary machine;
• and
• an abnormality detection device,
• wherein the rotary machine includes:
• a rotation shaft;
• and
• a plurality of shaft vibration sensors provided to be spaced apart in a diameter direction of the rotation shaft with respect to an outer circumferential surface of the rotation shaft and provided to be spaced apart in a shaft direction of the rotation shaft, and
• the abnormality detection device includes:
• a vibration measurement value acquisition unit configured to acquire a measurement value of vibration of the rotation shaft measured by the shaft vibration sensor for each rotation angle of the rotation shaft;
• a vibration vector calculation unit configured to calculate a vibration vector, the vibration vector indicating a rotation angle at which the vibration of the rotation shaft is a maximum and a magnitude of the vibration on the basis of the measurement value of the vibration;
• and
• an estimation unit configured to estimate an abnormality occurrence position in the shaft direction of the rotation shaft on the basis of a time change in the vibration vector.

An abnormality detection method comprising:

• acquiring a measurement value of vibration of a rotation shaft for each rotation angle of the rotation shaft, the measurement value being measured by each of a plurality of shaft vibration sensors, the plurality of shaft vibration sensors being provided to be spaced apart in a diameter direction of the rotation shaft with respect to an outer circumferential surface of the rotation shaft and being provided to be spaced apart in a shaft direction of the rotation shaft,
• calculating a vibration vector, the vibration vector indicating a rotation angle at which vibration of the rotation shaft is a maximum and a magnitude of the vibration on the basis of the measurement value of the vibration;
• and
• estimating an abnormality occurrence position in the shaft direction of the rotation shaft on the basis of a time change in the vibration vector.

A non-transitory computer-readable recording medium storing a program which causes a computer to execute:

• acquiring a measurement value of vibration of a rotation shaft for each rotation angle of the rotation shaft, the measurement value being measured by each of a plurality of shaft vibration sensors, the plurality of shaft vibration sensors being provided to be spaced apart in a diameter direction of the rotation shaft with respect to an outer circumferential surface of the rotation shaft and being provided to be spaced apart in a shaft direction of the rotation shaft, for each rotation angle of the rotation shaft;
• calculating a vibration vector, the vibration vector indicating a rotation angle at which vibration of the rotation shaft is a maximum and a magnitude of the vibration on the basis of the measurement value of the vibration;
• and
• estimating an abnormality occurrence position in the shaft direction of the rotation shaft on the basis of a time change in the vibration vector.