Abnormality diagnosis device, bearing, rotation device, industrial machine and vehicle
First Claim
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1. An abnormality diagnosis device comprising:
- a vibration detecting unit detecting vibration generated in a rotation device configured by including a bearing that supports a rotation shaft;
a rotation speed detecting unit detecting rotation speed of the rotation shaft;
a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit;
an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating;
an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating;
a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and
an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison,whereinafter the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison.
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Abstract
There is provided an abnormality diagnosis device, a bearing, a rotation device, an industrial machine, and a vehicle, which are able to discover abnormality early and also set a diagnosis threshold relatively easily. A differential value between an initial frequency component and an actual measurement frequency component is calculated, the differential value is compared to the diagnosis threshold, and abnormality diagnosis for an abnormality diagnosis target is carried out based on the comparison result, where the initial frequency component is a feature frequency component of abnormality of the abnormality diagnosis target in the rotation device, which is extracted from an initial vibration value measured at initial measurement timing while the axle is rotating at setting rotation speed during an operation of the rotation device, and the actual measurement frequency component is a feature frequency component extracted from an actual measurement vibration value measured at actual measurement timing that is the initial measurement timing or later while the axle is rotating at the setting rotation speed during the operation of the rotation device.
7 Citations
17 Claims
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1. An abnormality diagnosis device comprising:
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a vibration detecting unit detecting vibration generated in a rotation device configured by including a bearing that supports a rotation shaft; a rotation speed detecting unit detecting rotation speed of the rotation shaft; a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit; an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating; an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating; a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison, wherein after the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bearing, comprising:
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an abnormality diagnosis device, wherein the abnormality diagnosis device comprises; a vibration detecting unit detecting vibration generated in a rotation device configured by including the bearing that supports a rotation shaft; a rotation speed detecting unit detecting rotation speed of the rotation shaft; a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit; an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating; an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating; a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison, wherein after the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison. - View Dependent Claims (9, 10, 11)
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12. A rotation device, comprising:
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an abnormality diagnosis device, wherein the abnormality diagnosis device comprises; a vibration detecting unit detecting vibration venerated in the rotation device configured by including a bearing that supports a rotation shaft; a rotation speed detecting unit detecting rotation speed of the rotation shaft; a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit; an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating; an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating; a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison, wherein after the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison. - View Dependent Claims (13, 14, 15)
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16. An industrial machine, comprising:
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an abnormality diagnosis device, wherein the abnormality diagnosis device comprises; a vibration detecting unit detecting vibration venerated in a rotation device configured by including a bearing that supports a rotation shaft; a rotation speed detecting unit detecting rotation speed of the rotation shaft; a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit; an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating; an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating; a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison, wherein after the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison.
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17. A vehicle, comprising:
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an abnormality diagnosis device, wherein the abnormality diagnosis device comprises; a vibration detecting unit detecting vibration generated in a rotation device configured by including a bearing that supports a rotation shaft; a rotation speed detecting unit detecting rotation speed of the rotation shaft; a vibration measuring unit measuring vibration generated in the rotation device while the rotation shaft is rotating at previously set setting rotation speed, based on a detection result of the rotation speed detecting unit and a detection result of the vibration detecting unit; an initial frequency component extraction unit extracting a feature frequency component regarding abnormality of each abnormality diagnosis target of the rotation device, from an initial vibration value, which is a value of the vibration measured by the vibration measuring unit at previously set initial measurement timing while the rotation device is operating; an actual measurement frequency component extraction unit extracting the feature frequency component from an actual measurement vibration value, which is a value of the vibration measured by the vibration measuring unit at actual measurement timing that is the previously set initial measurement timing or later while the rotation device is operating; a differential value calculating unit calculating a differential value between an initial frequency component, which is the feature frequency component extracted from the initial vibration value, and an actual measurement frequency component, which is the feature frequency component extracted from the actual measurement vibration value; and an abnormality diagnosis unit comparing the differential value calculated by the differential value calculating unit and a previously set diagnosis threshold, and diagnosing abnormality of each of the abnormality diagnosis targets based on a result of the comparison, wherein after the initial frequency component extraction unit extracts the initial frequency component, the vibration measuring unit measures the actual measurement vibration value every time rotation speed of the rotation shaft becomes the setting rotation speed, the actual measurement frequency component extracting unit extracts the actual measurement frequency component from the measured actual measurement vibration value, the differential value calculating unit calculates a differential value between the initial frequency component and the extracted actual measurement frequency component, and the abnormality diagnosis unit compares the calculated differential value and the diagnosis threshold and diagnoses abnormality of each of the abnormality diagnosis targets based on a result of the comparison.
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Specification
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Current AssigneeNSK Limited
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Original AssigneeNSK Limited
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InventorsYoshida, Kazuhiro
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Primary Examiner(s)Ingram, Thomas
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Application NumberUS15/534,282Publication NumberTime in Patent Office1,357 DaysField of SearchUS Class CurrentCPC Class CodesF16C 2326/10 Railway vehicles in general...G01H 1/003 of rotating machines G01H1/...G01H 17/00 Measuring mechanical vibrat...G01M 13/045 Acoustic or vibration analysisG01M 17/08 Railway vehiclesG01N 2291/2696 Wheels, Gears, BearingsG07C 5/0808 Diagnosing performance data...
