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WO2021187454A1 - Abnormality detection device and abnormality detection method - Google Patents

Abnormality detection device and abnormality detection method Download PDF

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Publication number
WO2021187454A1
WO2021187454A1 PCT/JP2021/010516 JP2021010516W WO2021187454A1 WO 2021187454 A1 WO2021187454 A1 WO 2021187454A1 JP 2021010516 W JP2021010516 W JP 2021010516W WO 2021187454 A1 WO2021187454 A1 WO 2021187454A1
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WIPO (PCT)
Prior art keywords
abnormality
rotation
fluctuation characteristic
rotating shaft
rotation fluctuation
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PCT/JP2021/010516
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French (fr)
Japanese (ja)
Inventor
健吾 林
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いすゞ自動車株式会社
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Application filed by いすゞ自動車株式会社 filed Critical いすゞ自動車株式会社
Priority to CN202180022449.6A priority Critical patent/CN115315620A/en
Publication of WO2021187454A1 publication Critical patent/WO2021187454A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • G01M13/021—Gearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • the present disclosure relates to an abnormality detection device and an abnormality detection method for detecting an abnormality in a rotation mechanism.
  • an abnormality may occur due to seizure of the bearing or wear of the gear.
  • seizure of bearings is likely to occur when the supply of lubricating oil to bearings is insufficient, and wear of gears is likely to occur with aging deterioration.
  • An object of the present disclosure is to provide an abnormality detection device and an abnormality detection method capable of detecting an abnormality of a rotating mechanism caused by seizure of a bearing or wear of a gear.
  • the first aspect of the present disclosure is an abnormality detecting device for detecting an abnormality of a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic.
  • the upward shift amount of is equal to or greater than the bearing abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by seizure of the bearing has occurred, and the abnormality is detected.
  • a second aspect of the present disclosure is an abnormality detecting device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. When the amount of increase in amplitude of is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by wear of the gear has occurred, and the abnormality is detected.
  • a third aspect of the present disclosure is an abnormality detecting device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic.
  • the bearing abnormality determination threshold value it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is detected.
  • the amount of increase in the amplitude of the rotation fluctuation characteristic is equal to or greater than the gear abnormality determination threshold value, it is determined that the abnormality of the rotation mechanism caused by the wear of the gear has occurred, and the abnormality is detected.
  • a fourth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of upward shift of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing. When it is equal to or higher than the abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by seizure of the bearing has occurred, and the step of detecting the abnormality is provided.
  • a fifth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear. When it is equal to or higher than the abnormality determination threshold value, it has a step of determining that an abnormality of the rotation mechanism caused by wear of the gear has occurred and detecting the abnormality.
  • a sixth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of upward shift of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing.
  • the abnormality determination threshold value it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the amplitude of the actual rotation fluctuation characteristic is increased with respect to the normal rotation fluctuation characteristic.
  • the amount is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by wear of the gear has occurred, and the step of detecting the abnormality is provided.
  • the rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic.
  • the abnormality detection device and the abnormality detection method of the present disclosure it is possible to detect an abnormality of the rotating mechanism caused by seizure of bearings and wear of gears.
  • FIG. 1 is a diagram illustrating an abnormality detection device.
  • FIG. 2A is a diagram illustrating normal rotation fluctuation characteristics.
  • FIG. 2B is a diagram for explaining the rotation fluctuation characteristic when the bearing is seized.
  • FIG. 2C is a diagram for explaining the rotation fluctuation characteristics when the gears are worn.
  • FIG. 3 is a diagram illustrating an abnormality detection method.
  • FIG. 4 is a diagram illustrating an abnormality detection method.
  • the abnormality detecting device 100 is a rotating mechanism 104 having a rotating shaft 101, a bearing 102 that rotatably supports the rotating shaft 101, and a gear 103 that rotates integrally with the rotating shaft 101. Detect anomalies.
  • the rotating mechanism 104 is used in an internal combustion engine, the rotating shaft 101 is an idle gear shaft, the bearing 102 is an idle gear bush, and the gear 103 is an idle gear.
  • the abnormality detection device 100 includes, for example, a calculation means 105 which is a computer or an engine control unit.
  • the calculation means 105 compares the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristic (see FIG. 2A), and the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic.
  • the upward shift amount of is equal to or greater than the bearing abnormality determination threshold value, an abnormality of the rotation mechanism 104 due to seizure of the bearing 102 is detected.
  • the reason for comparing the actual rotation fluctuation characteristics when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristics is meaningful because the rotation fluctuation characteristics change as the rotation speed of the rotation shaft 101 changes. This is because it is not possible to make a comparison. Therefore, for example, it is necessary to make a comparison under steady conditions such as during idle operation and no-load operation of the internal combustion engine.
  • the rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic.
  • the torque-to-rotation angle characteristic is a so-called torque ripple (torque waveform), which indicates the relationship between the torque [Nm] acting on the rotation shaft 101 and the rotation angle [deg] of the rotation shaft 101.
  • the angular characteristic indicates the relationship between the rotational angular velocity [rad / s] of the rotating shaft 101 and the rotational angle [deg] of the rotating shaft 101. Further, as the torque and the rotational angular velocity, the torque and the rotational angular velocity in the desired rotation direction of the rotating shaft 101 are positive.
  • the torque may be detected by the torque sensor, the rotation angle may be detected by the rotation angle sensor, and the rotation angular velocity may be detected by the rotation angular velocity sensor. Further, the rotational angular velocity can be measured by arranging a sensor capable of detecting the tooth tip at a position facing the tooth surface of the gear 103 and grasping the rotation cycle for each tooth.
  • a sensor capable of detecting the tooth tip is, for example, a gap sensor.
  • both the maximum value and the minimum value of the torque become large. Further, since the torque is proportional to the rotational angular velocity, when the bearing 102 is seized, both the maximum value and the minimum value of the rotational angular velocity become large.
  • the upward shift amount when the bearing 102 is seized is experimentally measured in advance, the bearing abnormality determination threshold is set based on the upward shift amount, and the upward shift amount is equal to or larger than the bearing abnormality determination threshold. In this case, the abnormality of the rotating mechanism 104 due to the seizure of the bearing 102 may be detected.
  • the calculation means 105 of the abnormality detection device 100 compares the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and the actual rotation fluctuation with respect to the normal rotation fluctuation characteristic. When the amount of increase in the amplitude of the characteristic is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality has occurred in the rotation mechanism 104 due to wear of the gear 103, and the abnormality is detected.
  • the gear 103 When the gear 103 is worn, the backlash becomes large and the maximum value of the torque required to rotate the rotating shaft 101 becomes large as compared with the normal case. Therefore, as shown in FIG. 2C, the gear 103 has a large backlash. As the wear progresses, the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic also increases.
  • the gear abnormality determination threshold is set based on the amount of increase in amplitude, and the amount of increase in amplitude is equal to or greater than the gear abnormality determination threshold. In this case, the abnormality of the rotating mechanism 104 due to the wear of the gear 103 may be detected.
  • the rotation fluctuation characteristic depends on the operating state of the internal combustion engine and auxiliary machinery. Considering the occurrence of variation, the rotation fluctuation characteristics are acquired multiple times at predetermined cycles, and when there are multiple rotation fluctuation characteristics in which the upward shift amount is equal to or greater than the bearing abnormality judgment threshold, or the amplitude increase amount is the gear abnormality judgment threshold. Only when a plurality of the above rotation fluctuation characteristics exist, it may be determined that an abnormality of the rotation mechanism 104 has occurred and the abnormality may be detected.
  • the rotation fluctuation characteristic Since it is possible that the amount of the upward shift or the amount of increase in the amplitude does not continuously exceed the respective thresholds due to the variation, it is determined that the rotation mechanism 104 is normal.
  • the actual rotation fluctuation characteristic is shifted upward with respect to the normal rotation fluctuation characteristic. Both the amount and the amount of amplitude increase are equal to or greater than each threshold.
  • the progress of the abnormality according to the degree of deviation between the two may be grasped. That is, it can be seen that the larger the upward shift amount and the amplitude increase amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic and the closer to each threshold value, the more the deterioration toward the abnormality progresses.
  • the abnormality detection device 100 has, for example, an output means 106 which is a part of a function of a computer or an engine control unit.
  • the output means 106 detects either an abnormality of the rotation mechanism 104 due to seizure of the bearing 102 or an abnormality of the rotation mechanism 104 due to wear of the gear 103, the output means 106 notifies the abnormality of the rotation mechanism 104.
  • the output means 106 notifies the operator of the rotation mechanism 104 and the administrator of the rotation mechanism 104 of the abnormality of the rotation mechanism 104 by, for example, wireless communication or wired communication. Specifically, for example, if the rotating mechanism 104 is of an internal combustion engine mounted on the vehicle, is the abnormality of the rotating mechanism 104 caused by the seizure of the bearing 102 through the indicator lamp or the display to the driver of the vehicle? , Notifies whether the cause is due to wear of the gear 103, and prompts the replacement of parts and the warehousing / maintenance of the vehicle. Further, the vehicle manager and the maintenance person (the person who is near the vehicle or the person who is away from the vehicle may be notified in the same manner) may be notified in the same manner. In addition to the notification, the output means 106 may output, for example, an abnormality of the rotation mechanism 104 to a management server or the like and record a data log.
  • the abnormality detection method M100 is a rotation mechanism 104 having a rotation shaft 101, a bearing 102 that rotatably supports the rotation shaft 101, and a gear 103 that rotates integrally with the rotation shaft 101. It detects anomalies.
  • the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed is acquired, and in the next step S102, the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. It is determined whether or not the upward shift amount of is equal to or greater than the bearing abnormality determination threshold.
  • the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 is detected, and in the next step S103, the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 occurs. Notify and output the fact that there is.
  • the abnormality detection method M200 has a rotation mechanism including a rotation shaft 101, a bearing 102 that rotatably supports the rotation shaft 101, and a gear 103 that rotates integrally with the rotation shaft 101. It detects the abnormality of 104.
  • the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed is acquired, and in the next step S202, the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. It is determined whether or not the amount of increase in the amplitude of is equal to or greater than the gear abnormality determination threshold.
  • the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 is detected. It is possible to isolate the abnormality of the rotating mechanism 104 caused by the wear of the gear 103.
  • the abnormality detection device and abnormality detection method according to the present disclosure can be widely applied to a technique for detecting an abnormality in a rotating mechanism.

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  • General Physics & Mathematics (AREA)
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Abstract

This abnormality detection device detects abnormalities in a rotation mechanism 104 including a rotating shaft 101, a bearing 102 that supports the rotating shaft 101 in a rotatable manner, and a gear 103 that rotates integrally with the rotating shaft 101. The abnormality detection device compares an actual rotational fluctuation characteristic of the rotating shaft 101 when the rotating shaft 101 is rotating at a specific rotation speed with a normal rotational fluctuation characteristic, and detects an abnormality in the rotation mechanism 104 resulting from seizure of the bearing 102 if the amount of upward shift of the actual rotational fluctuation characteristic relative to the normal rotational fluctuation characteristic is greater than or equal to a bearing abnormality determination threshold and detects an abnormality in the rotation mechanism 104 resulting from wear of the gear 103 if the amount of increase in the amplitude of the actual rotational fluctuation characteristic relative to the normal rotational fluctuation characteristic is greater than or equal to a gear abnormality determination threshold.

Description

異常検知装置及び異常検知方法Anomaly detection device and abnormality detection method
　本開示は、回転機構の異常を検知する異常検知装置及び異常検知方法に関する。 The present disclosure relates to an abnormality detection device and an abnormality detection method for detecting an abnormality in a rotation mechanism.
　回転軸と、回転軸を回転自在に支持する軸受と、回転軸と一体的に回転する歯車と、を有する回転機構では、軸受の焼き付きや歯車の摩耗が原因で異常が生じる事が有る。例えば、軸受の焼き付きは、軸受への潤滑油の供給が不十分な場合に生じ易く、歯車の摩耗は、経年劣化に応じて生じ易い。 In a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft, an abnormality may occur due to seizure of the bearing or wear of the gear. For example, seizure of bearings is likely to occur when the supply of lubricating oil to bearings is insufficient, and wear of gears is likely to occur with aging deterioration.
日本国特開２０１７－１７５７７５号公報Japanese Patent Application Laid-Open No. 2017-175775
　軸受の焼き付きや歯車の摩耗が原因で生じる回転機構の異常を検知する事が望ましい。 It is desirable to detect abnormalities in the rotating mechanism caused by seizure of bearings and wear of gears.
　本開示の目的は、軸受の焼き付きや歯車の摩耗が原因で生じる回転機構の異常を検知する事が可能な異常検知装置及び異常検知方法を提供する事である。 An object of the present disclosure is to provide an abnormality detection device and an abnormality detection method capable of detecting an abnormality of a rotating mechanism caused by seizure of a bearing or wear of a gear.
　本開示の第１の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、当該異常検知装置は、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知する。 The first aspect of the present disclosure is an abnormality detecting device for detecting an abnormality of a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. When the upward shift amount of is equal to or greater than the bearing abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by seizure of the bearing has occurred, and the abnormality is detected.
　本開示の第２の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、当該異常検知装置は、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する。 A second aspect of the present disclosure is an abnormality detecting device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. When the amount of increase in amplitude of is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by wear of the gear has occurred, and the abnormality is detected.
　本開示の第３の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、当該異常検知装置は、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する。 A third aspect of the present disclosure is an abnormality detecting device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the abnormality detection device compares the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and compares the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. When the upward shift amount of is equal to or greater than the bearing abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is detected. When the amount of increase in the amplitude of the rotation fluctuation characteristic is equal to or greater than the gear abnormality determination threshold value, it is determined that the abnormality of the rotation mechanism caused by the wear of the gear has occurred, and the abnormality is detected.
　本開示の第４の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知するステップを有する。 A fourth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of upward shift of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing. When it is equal to or higher than the abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by seizure of the bearing has occurred, and the step of detecting the abnormality is provided.
　本開示の第５の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知するステップを有する。 A fifth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear. When it is equal to or higher than the abnormality determination threshold value, it has a step of determining that an abnormality of the rotation mechanism caused by wear of the gear has occurred and detecting the abnormality.
　本開示の第６の態様は、回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知するステップを有する。 A sixth aspect of the present disclosure is an abnormality detecting method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft. Therefore, the actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of upward shift of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing. When it is equal to or higher than the abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the amplitude of the actual rotation fluctuation characteristic is increased with respect to the normal rotation fluctuation characteristic. When the amount is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism caused by wear of the gear has occurred, and the step of detecting the abnormality is provided.
　前記回転変動特性は、トルク対回転角度特性又は回転角速度対回転角度特性である事が望ましい。 It is desirable that the rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic.
　前記回転機構の異常を通知する事が望ましい。 It is desirable to notify the abnormality of the rotation mechanism.
　本開示の異常検知装置及び異常検知方法によれば、軸受の焼き付きや歯車の摩耗が原因で生じる回転機構の異常を検知する事が出来る。 According to the abnormality detection device and the abnormality detection method of the present disclosure, it is possible to detect an abnormality of the rotating mechanism caused by seizure of bearings and wear of gears.
図１は、異常検知装置を説明する図である。FIG. 1 is a diagram illustrating an abnormality detection device. 図２Ａは、正常な回転変動特性を説明する図である。FIG. 2A is a diagram illustrating normal rotation fluctuation characteristics. 図２Ｂは、軸受の焼き付きが生じている場合の回転変動特性を説明する図である。FIG. 2B is a diagram for explaining the rotation fluctuation characteristic when the bearing is seized. 図２Ｃは、歯車の摩耗が生じている場合の回転変動特性を説明する図である。FIG. 2C is a diagram for explaining the rotation fluctuation characteristics when the gears are worn. 図３は、異常検知方法を説明する図である。FIG. 3 is a diagram illustrating an abnormality detection method. 図４は、異常検知方法を説明する図である。FIG. 4 is a diagram illustrating an abnormality detection method.
　［異常検知装置］
　図１に示す様に、異常検知装置１００は、回転軸１０１と、回転軸１０１を回転自在に支持する軸受１０２と、回転軸１０１と一体的に回転する歯車１０３と、を有する回転機構１０４の異常を検知する。 [Abnormality detection device]
As shown in FIG. 1, the abnormality detecting device 100 is a rotating mechanism 104 having a rotating shaft 101, a bearing 102 that rotatably supports the rotating shaft 101, and a gear 103 that rotates integrally with the rotating shaft 101. Detect anomalies.
　例えば、回転機構１０４は内燃機関で使用され、回転軸１０１はアイドルギヤシャフトであり、軸受１０２はアイドルギヤブッシュであり、歯車１０３はアイドルギヤである。 For example, the rotating mechanism 104 is used in an internal combustion engine, the rotating shaft 101 is an idle gear shaft, the bearing 102 is an idle gear bush, and the gear 103 is an idle gear.
　異常検知装置１００は、例えば、コンピュータやエンジンコントロールユニットである演算手段１０５を有する。演算手段１０５は、回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性（図２Ａを参照）と比較し、正常な回転変動特性に対する実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、軸受１０２の焼き付きに起因する回転機構１０４の異常を検知する。 The abnormality detection device 100 includes, for example, a calculation means 105 which is a computer or an engine control unit. The calculation means 105 compares the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristic (see FIG. 2A), and the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. When the upward shift amount of is equal to or greater than the bearing abnormality determination threshold value, an abnormality of the rotation mechanism 104 due to seizure of the bearing 102 is detected.
　回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較する理由は、回転軸１０１の回転数が変化すると、回転変動特性も変化するので、有意味の比較を行う事が出来ないからである。従って、例えば、内燃機関のアイドル運転時や無負荷運転時等の定常条件で比較する必要が有る。 The reason for comparing the actual rotation fluctuation characteristics when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristics is meaningful because the rotation fluctuation characteristics change as the rotation speed of the rotation shaft 101 changes. This is because it is not possible to make a comparison. Therefore, for example, it is necessary to make a comparison under steady conditions such as during idle operation and no-load operation of the internal combustion engine.
　回転変動特性は、トルク対回転角度特性又は回転角速度対回転角度特性である。トルク対回転角度特性は、所謂、トルクリップル（トルク波形）で、回転軸１０１に作用するトルク［Nm］と回転軸１０１の回転角度［deg］との関係を示すものであり、回転角速度対回転角度特性は、回転軸１０１の回転角速度［rad/s］と回転軸１０１の回転角度［deg］との関係を示すものである。また、トルクや回転角速度は、回転軸１０１の所期の回転方向のトルクや回転角速度を正とする。 The rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic. The torque-to-rotation angle characteristic is a so-called torque ripple (torque waveform), which indicates the relationship between the torque [Nm] acting on the rotation shaft 101 and the rotation angle [deg] of the rotation shaft 101. The angular characteristic indicates the relationship between the rotational angular velocity [rad / s] of the rotating shaft 101 and the rotational angle [deg] of the rotating shaft 101. Further, as the torque and the rotational angular velocity, the torque and the rotational angular velocity in the desired rotation direction of the rotating shaft 101 are positive.
　トルクはトルクセンサで検出すれば良く、回転角度は回転角度センサで検出すれば良く、回転角速度は回転角速度センサで検出すれば良い。また、歯車１０３の歯面に対向する位置に歯先を検出する事が可能なセンサを配置し、１歯毎の回転周期を把握する事によって、回転角速度を測定する事も出来る。歯先を検出する事が可能なセンサは、例えば、ギャップセンサである。 The torque may be detected by the torque sensor, the rotation angle may be detected by the rotation angle sensor, and the rotation angular velocity may be detected by the rotation angular velocity sensor. Further, the rotational angular velocity can be measured by arranging a sensor capable of detecting the tooth tip at a position facing the tooth surface of the gear 103 and grasping the rotation cycle for each tooth. A sensor capable of detecting the tooth tip is, for example, a gap sensor.
　軸受１０２の焼き付きが生じると、回転軸１０１が回転し難くなり、回転軸１０１を回転させる際に必要なトルクが何れの回転角度でも正常な場合と比較して大きくなるので、図２Ｂに示す様に、軸受１０２の焼き付きが進行するに連れて正常な回転変動特性に対する実際の回転変動特性の上方シフト量（所定の回転角度におけるトルクが正の方向へどれだけ変化したのかを示す量）も大きくなっていく。 When the bearing 102 is seized, the rotating shaft 101 becomes difficult to rotate, and the torque required to rotate the rotating shaft 101 becomes larger than in the normal case at any rotation angle. Therefore, as shown in FIG. 2B. In addition, as the seizure of the bearing 102 progresses, the amount of upward shift of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic (amount indicating how much the torque at a predetermined rotation angle changes in the positive direction) is also large. Become.
　即ち、軸受１０２の焼き付きが生じると、トルクの最大値と最小値とが共に大きくなる。また、トルクは回転角速度と比例するので、軸受１０２の焼き付きが生じると、回転角速度の最大値と最小値とが共に大きくなる。 That is, when seizure of the bearing 102 occurs, both the maximum value and the minimum value of the torque become large. Further, since the torque is proportional to the rotational angular velocity, when the bearing 102 is seized, both the maximum value and the minimum value of the rotational angular velocity become large.
　従って、軸受１０２の焼き付きが生じている場合の上方シフト量を予め実験的に測定しておき、当該上方シフト量を基に軸受異常判定閾値を設定し、上方シフト量が軸受異常判定閾値以上の場合に、軸受１０２の焼き付きに起因する回転機構１０４の異常を検知すれば良い。 Therefore, the upward shift amount when the bearing 102 is seized is experimentally measured in advance, the bearing abnormality determination threshold is set based on the upward shift amount, and the upward shift amount is equal to or larger than the bearing abnormality determination threshold. In this case, the abnormality of the rotating mechanism 104 due to the seizure of the bearing 102 may be detected.
　また、異常検知装置１００の演算手段１０５は、回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、正常な回転変動特性に対する実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、歯車１０３の摩耗に起因する回転機構１０４の異常が発生したと判断して、当該異常を検知する。 Further, the calculation means 105 of the abnormality detection device 100 compares the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristic, and the actual rotation fluctuation with respect to the normal rotation fluctuation characteristic. When the amount of increase in the amplitude of the characteristic is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality has occurred in the rotation mechanism 104 due to wear of the gear 103, and the abnormality is detected.
　歯車１０３の摩耗が生じると、バックラッシュが大きくなり、回転軸１０１を回転させる際に必要なトルクの最大値が正常な場合と比較して大きくなるので、図２Ｃに示す様に、歯車１０３の摩耗が進行するに連れて正常な回転変動特性に対する実際の回転変動特性の振幅増加量も大きくなっていく。 When the gear 103 is worn, the backlash becomes large and the maximum value of the torque required to rotate the rotating shaft 101 becomes large as compared with the normal case. Therefore, as shown in FIG. 2C, the gear 103 has a large backlash. As the wear progresses, the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic also increases.
　即ち、歯車１０３の摩耗が生じると、トルクの最大値のみが大きくなる。また、トルクは回転角速度と比例するので、歯車１０３の摩耗が生じると、回転角速度の最大値も大きくなる。 That is, when the gear 103 is worn, only the maximum value of the torque becomes large. Further, since the torque is proportional to the rotational angular velocity, when the gear 103 is worn, the maximum value of the rotational angular velocity also increases.
　従って、歯車１０３の摩耗が生じている場合の振幅増加量を予め実験的に測定しておき、当該振幅増加量を基に歯車異常判定閾値を設定し、振幅増加量が歯車異常判定閾値以上の場合に、歯車１０３の摩耗に起因する回転機構１０４の異常を検知すれば良い。 Therefore, the amount of increase in amplitude when the gear 103 is worn is experimentally measured in advance, the gear abnormality determination threshold is set based on the amount of increase in amplitude, and the amount of increase in amplitude is equal to or greater than the gear abnormality determination threshold. In this case, the abnormality of the rotating mechanism 104 due to the wear of the gear 103 may be detected.
　尚、軸受１０２の焼き付きに起因する回転機構１０４の異常と歯車１０３の摩耗に起因する回転機構１０４の異常の何れを検知する場合でも、内燃機関や補機類の運転状態により、回転変動特性にバラツキが生じる事を考慮し、所定の周期毎に回転変動特性を複数回取得し、上方シフト量が軸受異常判定閾値以上となる回転変動特性が複数存在する場合や振幅増加量が歯車異常判定閾値以上となる回転変動特性が複数存在する場合のみ、回転機構１０４の異常が発生したと判断して、当該異常を検知しても良い。 Regardless of whether the abnormality of the rotation mechanism 104 due to seizure of the bearing 102 or the abnormality of the rotation mechanism 104 due to the wear of the gear 103 is detected, the rotation fluctuation characteristic depends on the operating state of the internal combustion engine and auxiliary machinery. Considering the occurrence of variation, the rotation fluctuation characteristics are acquired multiple times at predetermined cycles, and when there are multiple rotation fluctuation characteristics in which the upward shift amount is equal to or greater than the bearing abnormality judgment threshold, or the amplitude increase amount is the gear abnormality judgment threshold. Only when a plurality of the above rotation fluctuation characteristics exist, it may be determined that an abnormality of the rotation mechanism 104 has occurred and the abnormality may be detected.
　即ち、ある周期に於ける回転変動特性の上方シフト量が軸受異常判定閾値以上、又はある周期に於ける回転変動特性の振幅増加量が歯車異常判定閾値以上となったとしても、回転変動特性のバラツキで偶然に各閾値以上となった事も考えられるので、上方シフト量や振幅増加量が継続して各閾値以上となっていない様な場合は回転機構１０４が正常であると判断する。 That is, even if the upward shift amount of the rotation fluctuation characteristic in a certain period is equal to or more than the bearing abnormality judgment threshold value, or the amplitude increase amount of the rotation fluctuation characteristic in a certain period is equal to or more than the gear abnormality judgment threshold value, the rotation fluctuation characteristic Since it is possible that the amount of the upward shift or the amount of increase in the amplitude does not continuously exceed the respective thresholds due to the variation, it is determined that the rotation mechanism 104 is normal.
　また、軸受１０２の焼き付きに起因する回転機構１０４の異常と歯車１０３の摩耗に起因する回転機構１０４の異常とが同時に生じている場合は、正常な回転変動特性に対する実際の回転変動特性の上方シフト量と振幅増加量の両方が各閾値以上となる。 Further, when the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 and the abnormality of the rotation mechanism 104 due to the wear of the gear 103 occur at the same time, the actual rotation fluctuation characteristic is shifted upward with respect to the normal rotation fluctuation characteristic. Both the amount and the amount of amplitude increase are equal to or greater than each threshold.
　更に、正常な回転変動特性に対する実際の回転変動特性の上方シフト量と振幅増加量とを各閾値と比較する事によって、両者の乖離度に応じた異常の進行具合を把握しても良い。即ち、正常な回転変動特性に対する実際の回転変動特性の上方シフト量と振幅増加量とが大きくなって各閾値に近づく程、異常へ向けた劣化等が進行している事が分かる。 Furthermore, by comparing the amount of upward shift and the amount of amplitude increase of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic with each threshold value, the progress of the abnormality according to the degree of deviation between the two may be grasped. That is, it can be seen that the larger the upward shift amount and the amplitude increase amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic and the closer to each threshold value, the more the deterioration toward the abnormality progresses.
　従って、正常な回転変動特性に対する実際の回転変動特性の上方シフト量と振幅増加量とが各閾値に対してどれ程乖離しているかを見る事によって、異常発生までの時期を予測する事も出来る。 Therefore, it is possible to predict the time until the abnormality occurs by observing how much the upward shift amount and the amplitude increase amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic deviate from each threshold value. ..
　更に、異常検知装置１００は、例えば、コンピュータやエンジンコントロールユニットの一部機能である出力手段１０６を有する。出力手段１０６は、軸受１０２の焼き付きに起因する回転機構１０４の異常と歯車１０３の摩耗に起因する回転機構１０４の異常の何れかを検知した場合は、回転機構１０４の異常を通知する。 Further, the abnormality detection device 100 has, for example, an output means 106 which is a part of a function of a computer or an engine control unit. When the output means 106 detects either an abnormality of the rotation mechanism 104 due to seizure of the bearing 102 or an abnormality of the rotation mechanism 104 due to wear of the gear 103, the output means 106 notifies the abnormality of the rotation mechanism 104.
　出力手段１０６は、例えば、無線通信や有線通信で回転機構１０４の異常を回転機構１０４の操作者や回転機構１０４の管理者に通知する。具体的には、例えば、回転機構１０４が車両に搭載された内燃機関のものであれば、車両の運転者にインジケータランプやディスプレイを通じて、回転機構１０４の異常が軸受１０２の焼き付きに起因するものか、歯車１０３の摩耗に起因するものかを通知すると共に、部品の交換や車両の入庫・整備を促す。また、車両の管理者や整備者（車両の近くに居る者でも車両から離れた位置に居る者でも良い）に同様に通知しても良い。出力手段１０６は、通知以外にも、例えば、回転機構１０４の異常を管理サーバ等に出力し、データログを記録させても良い。 The output means 106 notifies the operator of the rotation mechanism 104 and the administrator of the rotation mechanism 104 of the abnormality of the rotation mechanism 104 by, for example, wireless communication or wired communication. Specifically, for example, if the rotating mechanism 104 is of an internal combustion engine mounted on the vehicle, is the abnormality of the rotating mechanism 104 caused by the seizure of the bearing 102 through the indicator lamp or the display to the driver of the vehicle? , Notifies whether the cause is due to wear of the gear 103, and prompts the replacement of parts and the warehousing / maintenance of the vehicle. Further, the vehicle manager and the maintenance person (the person who is near the vehicle or the person who is away from the vehicle may be notified in the same manner) may be notified in the same manner. In addition to the notification, the output means 106 may output, for example, an abnormality of the rotation mechanism 104 to a management server or the like and record a data log.
　［異常検知方法］
　図３に示す様に、異常検知方法Ｍ１００は、回転軸１０１と、回転軸１０１を回転自在に支持する軸受１０２と、回転軸１０１と一体的に回転する歯車１０３と、を有する回転機構１０４の異常を検知するものである。 [Abnormality detection method]
As shown in FIG. 3, the abnormality detection method M100 is a rotation mechanism 104 having a rotation shaft 101, a bearing 102 that rotatably supports the rotation shaft 101, and a gear 103 that rotates integrally with the rotation shaft 101. It detects anomalies.
　具体的には、最初のステップＳ１０１で、回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を取得し、次のステップＳ１０２で、正常な回転変動特性に対する実際の回転変動特性の上方シフト量が軸受異常判定閾値以上か否かを判定する。 Specifically, in the first step S101, the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed is acquired, and in the next step S102, the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. It is determined whether or not the upward shift amount of is equal to or greater than the bearing abnormality determination threshold.
　上方シフト量が軸受異常判定閾値以上の場合は、軸受１０２の焼き付きに起因する回転機構１０４の異常を検知し、次のステップＳ１０３で、軸受１０２の焼き付きに起因する回転機構１０４の異常が生じている事を外部へ通知・出力する。 When the upward shift amount is equal to or greater than the bearing abnormality determination threshold value, the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 is detected, and in the next step S103, the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 occurs. Notify and output the fact that there is.
　また、図４に示す様に、異常検知方法Ｍ２００は、回転軸１０１と、回転軸１０１を回転自在に支持する軸受１０２と、回転軸１０１と一体的に回転する歯車１０３と、を有する回転機構１０４の異常を検知するものである。 Further, as shown in FIG. 4, the abnormality detection method M200 has a rotation mechanism including a rotation shaft 101, a bearing 102 that rotatably supports the rotation shaft 101, and a gear 103 that rotates integrally with the rotation shaft 101. It detects the abnormality of 104.
　具体的には、最初のステップＳ２０１で、回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を取得し、次のステップＳ２０２で、正常な回転変動特性に対する実際の回転変動特性の振幅増加量が歯車異常判定閾値以上か否かを判定する。 Specifically, in the first step S201, the actual rotation fluctuation characteristic when the rotation shaft 101 rotates at a specific rotation speed is acquired, and in the next step S202, the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic. It is determined whether or not the amount of increase in the amplitude of is equal to or greater than the gear abnormality determination threshold.
　振幅増加量が歯車異常判定閾値以上の場合は、歯車１０３の摩耗に起因する回転機構１０４の異常が発生したと判断して当該異常を検知し、次のステップＳ２０３で、歯車１０３の摩耗に起因する回転機構１０４の異常が生じている事を外部へ通知・出力する。 When the amount of increase in amplitude is equal to or greater than the gear abnormality determination threshold value, it is determined that an abnormality has occurred in the rotation mechanism 104 due to wear of the gear 103, and the abnormality is detected. Notifies and outputs to the outside that an abnormality has occurred in the rotating mechanism 104.
　以上に説明した様に、回転軸１０１が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較することで、軸受１０２の焼き付きに起因する回転機構１０４の異常と歯車１０３の摩耗に起因する回転機構１０４の異常とを切り分ける事が出来る。 As described above, by comparing the actual rotation fluctuation characteristics when the rotation shaft 101 rotates at a specific rotation speed with the normal rotation fluctuation characteristics, the abnormality of the rotation mechanism 104 due to the seizure of the bearing 102 is detected. It is possible to isolate the abnormality of the rotating mechanism 104 caused by the wear of the gear 103.
　本出願は、2020年3月19日付で出願された日本国特許出願（特願2020-049752）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on a Japanese patent application filed on March 19, 2020 (Japanese Patent Application No. 2020-049752), the contents of which are incorporated herein by reference.
　本開示に係る異常検知装置及び異常検知方法は、回転機構の異常を検知する技術に広く適用することができる。 The abnormality detection device and abnormality detection method according to the present disclosure can be widely applied to a technique for detecting an abnormality in a rotating mechanism.
１００　異常検知装置
１０１　回転軸
１０２　軸受
１０３　歯車
１０４　回転機構
１０５　演算手段
１０６　出力手段 100 Anomaly detection device 101 Rotating shaft 102 Bearing 103 Gear 104 Rotating mechanism 105 Computational means 106 Output means

Claims (10)

  1. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知装置。     An abnormality detection device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the upward shift amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing abnormality determination threshold value. In the above cases, the abnormality detecting device is characterized in that it determines that an abnormality of the rotating mechanism has occurred due to seizure of the bearing and detects the abnormality.
  2. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知装置。     An abnormality detection device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear abnormality determination threshold value. In the above cases, the abnormality detecting device is characterized in that it determines that an abnormality of the rotating mechanism has occurred due to the wear of the gear and detects the abnormality.
  3. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知装置であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知装置。     An abnormality detection device for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the upward shift amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing abnormality determination threshold value. In the above case, it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear. An abnormality detection device, characterized in that, when the abnormality determination threshold value is equal to or higher than the abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism has occurred due to wear of the gear, and the abnormality is detected.
  4. 　前記回転変動特性は、トルク対回転角度特性又は回転角速度対回転角度特性である
    　請求項１乃至３の何れか一項に記載の異常検知装置。     The abnormality detection device according to any one of claims 1 to 3, wherein the rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic.
  5. 　前記回転機構の異常を通知する
    　請求項１乃至４の何れか一項に記載の異常検知装置。     The abnormality detection device according to any one of claims 1 to 4, which notifies the abnormality of the rotation mechanism.
  6. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知方法。     An abnormality detection method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the upward shift amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing abnormality determination threshold value. In the above case, the abnormality detection method is characterized in that it is determined that an abnormality of the rotation mechanism caused by seizure of the bearing has occurred and the abnormality is detected.
  7. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知方法。     An abnormality detection method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear abnormality determination threshold value. In the above case, the abnormality detection method is characterized in that it is determined that an abnormality of the rotation mechanism has occurred due to the wear of the gear and the abnormality is detected.
  8. 　回転軸と、前記回転軸を回転自在に支持する軸受と、前記回転軸と一体的に回転する歯車と、を有する回転機構の異常を検知する異常検知方法であって、
    　前記回転軸が特定の回転数で回転する時の実際の回転変動特性を正常な回転変動特性と比較し、前記正常な回転変動特性に対する前記実際の回転変動特性の上方シフト量が軸受異常判定閾値以上の場合に、前記軸受の焼き付きに起因する前記回転機構の異常が発生したと判断して、当該異常を検知し、前記正常な回転変動特性に対する前記実際の回転変動特性の振幅増加量が歯車異常判定閾値以上の場合に、前記歯車の摩耗に起因する前記回転機構の異常が発生したと判断して、当該異常を検知する
    　事を特徴とする異常検知方法。     An abnormality detection method for detecting an abnormality in a rotating mechanism having a rotating shaft, a bearing that rotatably supports the rotating shaft, and a gear that rotates integrally with the rotating shaft.
    The actual rotation fluctuation characteristic when the rotation shaft rotates at a specific rotation speed is compared with the normal rotation fluctuation characteristic, and the upward shift amount of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the bearing abnormality determination threshold value. In the above case, it is determined that an abnormality of the rotation mechanism due to seizure of the bearing has occurred, the abnormality is detected, and the amount of increase in the amplitude of the actual rotation fluctuation characteristic with respect to the normal rotation fluctuation characteristic is the gear. An abnormality detection method, characterized in that, when the abnormality determination threshold value is equal to or higher than the abnormality determination threshold value, it is determined that an abnormality of the rotation mechanism has occurred due to wear of the gear, and the abnormality is detected.
  9. 　前記回転変動特性は、トルク対回転角度特性又は回転角速度対回転角度特性である
    　請求項６乃至８の何れか一項に記載の異常検知方法。     The abnormality detection method according to any one of claims 6 to 8, wherein the rotation fluctuation characteristic is a torque vs. rotation angle characteristic or a rotation angular velocity vs. rotation angle characteristic.
  10. 　前記回転機構の異常を通知する
    　請求項６乃至９の何れか一項に記載の異常検知方法。     The abnormality detection method according to any one of claims 6 to 9, which notifies an abnormality of the rotation mechanism.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5754835A (en) * 1980-09-19 1982-04-01 Hitachi Ltd Diagnosis apparatus for damage on sliding bearing
JP2016008536A (en) * 2014-06-24 2016-01-18 Ntn株式会社 State monitoring system and wind generator system mounted with the same
JP2017175775A (en) * 2016-03-23 2017-09-28 株式会社デンソー Electronic controller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5754835A (en) * 1980-09-19 1982-04-01 Hitachi Ltd Diagnosis apparatus for damage on sliding bearing
JP2016008536A (en) * 2014-06-24 2016-01-18 Ntn株式会社 State monitoring system and wind generator system mounted with the same
JP2017175775A (en) * 2016-03-23 2017-09-28 株式会社デンソー Electronic controller

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