WO2021187452A1 - Diagnostic device for bearing device - Google Patents

Diagnostic device for bearing device Download PDF

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Publication number
WO2021187452A1
WO2021187452A1 PCT/JP2021/010503 JP2021010503W WO2021187452A1 WO 2021187452 A1 WO2021187452 A1 WO 2021187452A1 JP 2021010503 W JP2021010503 W JP 2021010503W WO 2021187452 A1 WO2021187452 A1 WO 2021187452A1
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WIPO (PCT)
Prior art keywords
bearing
temperature sensor
temperature
gear
lubricating oil
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PCT/JP2021/010503
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French (fr)
Japanese (ja)
Inventor
英樹 長田
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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 CN202180022438.8A priority Critical patent/CN115298473B/en
Publication of WO2021187452A1 publication Critical patent/WO2021187452A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
    • 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

Definitions

  • This disclosure relates to a diagnostic device for bearing devices.
  • a power transmission mechanism for transmitting power from a crankshaft to a camshaft.
  • this power transmission mechanism is a gear type
  • the power transmission mechanism is a bearing provided with a gear, a slide bearing that rotatably supports the gear, and an oil passage that supplies lubricating oil to the bearing surface of the slide bearing.
  • a device is provided.
  • An object of the present disclosure is to provide a bearing device diagnostic device capable of immediately detecting an abnormality in the bearing device.
  • the diagnostic device for the bearing device is A diagnostic device for a bearing device including a gear, a slide bearing that rotatably supports the gear, and an oil passage that supplies lubricating oil to the bearing surface of the slide bearing.
  • a first temperature sensor that detects the temperature of the lubricating oil before it is supplied to the bearing surface
  • a second temperature sensor that detects the temperature of the lubricating oil after passing through the bearing surface, and The state in which the temperature difference detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value and the temperature difference is equal to or greater than the predetermined threshold value continues for a predetermined time or longer.
  • a diagnostic unit configured to determine that the bearing device is abnormal when To be equipped.
  • the second temperature sensor is arranged at a position where it comes into contact with the lubricating oil that drops after passing through the bearing surface.
  • the bearing device is provided in the power transmission mechanism of the internal combustion engine.
  • an abnormality of the bearing device can be detected immediately.
  • FIG. 1 is a schematic view showing a diagnostic device for a bearing device.
  • FIG. 2 is a flowchart of the diagnostic routine.
  • FIG. 1 is a schematic view showing a diagnostic device for a bearing device according to the present embodiment.
  • Bearing devices are applied to internal combustion engines (also referred to as engines), and in particular, are applied to power transmission mechanisms that transmit power from a crankshaft to a camshaft in an internal combustion engine.
  • the internal combustion engine is a diesel engine for a vehicle, and the vehicle is a large vehicle such as a truck.
  • the types and uses of the vehicle and the internal combustion engine are not particularly limited.
  • each direction of front, back, left, right, up and down is defined as shown in the figure. However, it should be noted that each of these directions is only defined for convenience of explanation. In the case of the present embodiment, each of these directions coincides with each direction of the vehicle and the engine.
  • the bearing device 1 is provided on the rear surface of the engine block 2.
  • the engine block 2 includes a cylinder block, a crankcase, and a cylinder head, and the bearing device 1 of the present embodiment is provided in the crankcase.
  • the bearing device 1 includes a gear 3, a slide bearing 4 that rotatably supports the gear 3, and an oil passage 6 that supplies lubricating oil (partially indicated by reference numeral O) to the bearing surface 5 of the slide bearing 4. .
  • the gear 3 is an idle gear in the case of the present embodiment, and is meshed and arranged between the upstream gear 7 on the upstream side in the driving force transmission direction and the downstream gear 8 on the downstream side.
  • the slide bearing 4 is a substantially columnar member, also called a bush, and is inserted into the central portion of the gear 3.
  • the slide bearing 4 has a central axis C extending in the front-rear direction, and the inner peripheral surface 9 of the gear 3 is rotatably and radially supported by the bearing surface 5 on the outer peripheral side thereof.
  • the bearing portion 10 is formed by the bearing surface 5 and the inner peripheral surface 9.
  • the slide bearing 4 is fixed to the rear surface portion of the engine block 2 by a bolt 11 inserted through the central portion thereof.
  • the slide bearing 4 and the engine block 2 are provided with engaging portions (for example, grooves and protrusions) that prevent the slide bearing 4 from rotating when the slide bearing 4 is fixed by the bolt 11.
  • a flange portion 12 that supports the front end portion 3A of the gear 3 in the thrust direction is integrally formed at the front end portion of the slide bearing 4.
  • a washer 13 that supports the rear surface portion 3B of the gear 3 in the thrust direction is interposed between the bolt 11 and the slide bearing 4.
  • the oil passage 6 includes an oil passage 14 in the block formed inside the engine block 2 and an oil passage 15 in the bearing formed inside the slide bearing 4.
  • An oil gallery 16 as a lubricating oil reservoir is provided on the upstream side of the oil passage 14 in the block in the lubricating oil flow direction, and lubricating oil is supplied to the oil passage 14 in the block from the oil gallery 16.
  • the oil gallery 16 is formed inside the engine block 2 (for example, a crankcase).
  • the oil passage 15 in the bearing is formed in an L shape, its upstream end is connected to the oil passage 14 in the block, and its downstream end is open on the bearing surface 5.
  • the lubricating oil supplied from the oil gallery 16 to the oil passage 14 in the block flows through the oil passage 15 in the bearing and is supplied to the bearing portion 10. Then, the bearing portion 10 is lubricated by the lubricating oil.
  • the lubricating oil lubricates the thrust sliding portion between the front flange portion 12 and the front portion 3A of the gear 3, and then flows down along the front portion 3A of the gear 3 and downwards as indicated by reference numeral O. Dropped. Further, the lubricating oil lubricates the thrust sliding portion between the washer 13 on the rear side and the rear surface portion 3B of the gear 3, and then flows down along the rear surface portion 3B of the gear 3 and meshes with the upstream gear 7. It is supplied to the unit or dropped downward.
  • the diagnostic device 50 includes a first temperature sensor 51 that detects the temperature of the lubricating oil before being supplied to the bearing surface 5, and a second temperature sensor 52 that detects the temperature of the lubricating oil after passing through the bearing surface 5. And a diagnostic unit for determining whether or not the bearing device 1 is abnormal.
  • the diagnostic unit is composed of an electronic control unit (referred to as an ECU) 100 for controlling the engine.
  • the ECU 100 is in a state where the temperature difference detected by the first temperature sensor 51 and the second temperature sensor 52 is equal to or greater than a predetermined threshold value and the temperature difference is equal to or greater than a predetermined threshold value for a predetermined time.
  • the bearing device 1 is configured to be determined to be abnormal.
  • the first temperature sensor 51 is installed in the oil gallery 16 and detects the temperature of the lubricating oil in the oil gallery 16.
  • the second temperature sensor 52 is arranged at a position below the bearing portion 10. Specifically, the second temperature sensor 52 finishes lubrication between the bearing portion 10 and the thrust sliding portion on the front side and comes into contact with the lubricating oil O dripping from the front surface portion 3A of the gear 3. It is placed in the position to be used. That is, the second temperature sensor 52 is arranged directly below the front surface portion 3A of the gear 3.
  • the second temperature sensor 52 is formed in an axial shape, is arranged in a direction perpendicular to the central axis C, and is supported by the engine block 2 at a position not shown in the drawing.
  • the first temperature sensor 51 and the second temperature sensor 52 are connected to the ECU 100. Further, a warning device 53 for giving a warning to a vehicle user or the like is also connected to the ECU 100.
  • the warning device 53 can be configured by any device such as a warning light, an alarm, and an information display.
  • the cause of poor lubrication in the bearing portion 10 of the bearing device 1 is, for example, the use of deteriorated lubricating oil or the failure of a driven component (auxiliary machine or the like) driven via the gear 3.
  • the amount of lubricating oil in the bearing portion 10 decreases, the sliding resistance of the bearing portion 10 increases, and the bearing portion 10 generates heat and its temperature rises.
  • the gear 3 may seize on the slide bearing 4 and cause a failure.
  • this seizure may cause the engine itself to fail due to overload.
  • the gear 3 In any case, if the gear 3 is seized, the engine must be disassembled and maintained, or in the worst case, the engine must be replaced, resulting in a serious failure.
  • the abnormality of the bearing device 1 is detected immediately for preventive maintenance before such a serious failure occurs, and the probability of a serious failure is greatly reduced by this.
  • the temperature difference ⁇ T may temporarily reach the threshold value ⁇ Ts or more for some reason even though it is not abnormal.
  • the second condition for determining the bearing device 1 as abnormal is that the state in which the temperature difference ⁇ T is equal to or greater than the threshold value ⁇ Ts continues for a predetermined time or longer so as not to make an erroneous determination in such a case.
  • the temperature difference threshold value ⁇ Ts is set to a value equal to the minimum value of the temperature difference ⁇ T experimentally obtained when, for example, lubrication failure of the bearing portion 10 occurs.
  • the predetermined time is, for example, a time during which the temperature difference ⁇ T temporarily becomes the threshold value ⁇ Ts or more even though the bearing portion 10 is not poorly lubricated, and is equal to the maximum value of the experimentally obtained time. It is set.
  • the illustrated routine is repeatedly executed by the ECU 100 every predetermined calculation cycle ⁇ .
  • step S101 the ECU 100 acquires the values of the first temperature T1 and the second temperature T2 detected by the first temperature sensor 51 and the second temperature sensor 52, respectively.
  • step S103 the ECU 100 determines whether or not the calculated temperature difference ⁇ T is equal to or greater than a predetermined threshold value ⁇ Ts.
  • the ECU 100 proceeds to step S104 and counts up the value (timer value) TM of the built-in timer.
  • step S105 the ECU 100 determines whether or not the timer value TM is equal to or greater than the predetermined value TMs corresponding to the predetermined time.
  • step S106 determines that the bearing device 1 is abnormal, activates (turns on) the warning device 53, and ends the routine. This makes it possible to encourage vehicle users and the like to perform inspections and maintenance.
  • the vehicle user or the like responds to the warning and immediately carries out inspection and maintenance, so that the cause of the abnormality can be investigated and removed before the gear 3 is actually seized. Therefore, the cause can be eliminated before a serious failure occurs, and the probability of a serious failure can be significantly reduced.
  • step S105 if the timer value TM is less than the predetermined value TMs in step S105, the ECU 100 ends the routine as it is. As a result, the timer value TM is held at the current value.
  • step S103 If the temperature difference ⁇ T is less than the threshold value ⁇ Ts in step S103, the ECU 100 proceeds to step S107 to reset the timer value TM and then ends the routine.
  • the temperature difference ⁇ T may become less than the threshold value ⁇ Ts in step S103, and the timer value TM may be reset.
  • This case corresponds to the case where the temperature difference ⁇ T temporarily becomes the threshold value ⁇ Ts or more and then returns to the threshold value ⁇ Ts even though the bearing device 1 is normal. Therefore, in this case, the timer value TM is reset to prevent erroneous determination, and the count-up of the timer value TM is also stopped.
  • step S106 the ECU 100 substantially determines that the bearing device 1 is not abnormal, that is, normal.
  • the abnormality of the bearing device 1 can be detected immediately. Then, it is possible to prevent the abnormality from developing into a serious failure in advance.
  • the bearing device may be applied to a part other than the power transmission device of the internal combustion engine, or may be applied to a mechanical device other than the internal combustion engine.
  • the temperature detection points of the first temperature sensor 51 and the second temperature sensor 52 are not limited to the above.
  • the first temperature sensor 51 may detect the temperature of the lubricating oil in the oil passage connecting the oil gallery 16 and the oil passage 14 in the block, and may detect the temperature of the lubricating oil in the oil passage 14 in the block or the oil passage 15 in the bearing. May be detected.
  • the second temperature sensor 52 may come into contact with the lubricating oil O scattered from the rotating gear 3 and detect the temperature of the lubricating oil O.
  • the second temperature sensor 52 can be arranged at an arbitrary height position, and may be arranged at a position in front of or behind the gear 3.
  • the bearing device diagnostic device according to the present disclosure can be widely applied to a diagnostic device that immediately detects an abnormality in the bearing device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Sliding-Contact Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Provided is a diagnostic device for a bearing device (1) which comprises: a gear (3); a slide bearing (4) that supports the gear rotatably; and an oil passage (6) that supplies a lubricant to the bearing surface (5) of the slide bearing. The diagnostic device is provided with: a first temperature sensor (51) that detects the temperature of the lubricant prior to the supply thereof to the bearing surface; a second temperature sensor (52) that detects the temperature of the lubricant after the lubricant has passed over the bearing surface; and a diagnostic unit (100) that is configured to determine that there is an anomaly in the bearing device when the difference between the temperatures detected by the first temperature sensor and the second temperature sensor is greater than or equal to a prescribed threshold and the state in which the difference between the temperatures is greater than or equal to the prescribed threshold has continued for a prescribed amount of time or longer.

Description

軸受装置の診断装置Bearing equipment diagnostic equipment
　本開示は軸受装置の診断装置に関する。 This disclosure relates to a diagnostic device for bearing devices.
　例えば内燃機関においては、クランクシャフトからカムシャフトに動力を伝達する動力伝達機構が設けられる。そしてこの動力伝達機構が歯車式である場合、動力伝達機構には、歯車と、歯車を回転可能に支持するすべり軸受と、すべり軸受の軸受面に潤滑油を供給する油路とを備えた軸受装置が設けられる。 For example, in an internal combustion engine, a power transmission mechanism for transmitting power from a crankshaft to a camshaft is provided. When this power transmission mechanism is a gear type, the power transmission mechanism is a bearing provided with a gear, a slide bearing that rotatably supports the gear, and an oil passage that supplies lubricating oil to the bearing surface of the slide bearing. A device is provided.
日本国特開平５－２０２９３０号公報Japanese Patent Application Laid-Open No. 5-202930
　軸受装置に潤滑不良による異常が生じると、歯車がすべり軸受に焼き付く等の故障に至る可能性がある。こうした故障に至る前に、軸受装置の異常を即座に検出することが望まれる。 If an abnormality occurs in the bearing device due to poor lubrication, there is a possibility of failure such as the gears seizing on the slide bearing. It is desirable to immediately detect an abnormality in the bearing device before such a failure occurs.
　本開示の目的は、軸受装置の異常を即座に検出することができる軸受装置の診断装置を提供することである。 An object of the present disclosure is to provide a bearing device diagnostic device capable of immediately detecting an abnormality in the bearing device.
　本開示の一の態様の軸受装置の診断装置は、
　歯車と、前記歯車を回転可能に支持するすべり軸受と、前記すべり軸受の軸受面に潤滑油を供給する油路とを備えた軸受装置の診断装置であって、
　前記軸受面に供給される前の潤滑油の温度を検出する第１温度センサと、
　前記軸受面を通過した後の潤滑油の温度を検出する第２温度センサと、
　前記第１温度センサおよび前記第２温度センサによりそれぞれ検出された温度の差が所定のしきい値以上であり、かつ、前記温度の差が前記所定のしきい値以上の状態が所定時間以上継続したときに、前記軸受装置を異常と判断するように構成された診断ユニットと、
　を備える。 The diagnostic device for the bearing device according to one aspect of the present disclosure is
A diagnostic device for a bearing device including a gear, a slide bearing that rotatably supports the gear, and an oil passage that supplies lubricating oil to the bearing surface of the slide bearing.
A first temperature sensor that detects the temperature of the lubricating oil before it is supplied to the bearing surface, and
A second temperature sensor that detects the temperature of the lubricating oil after passing through the bearing surface, and
The state in which the temperature difference detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value and the temperature difference is equal to or greater than the predetermined threshold value continues for a predetermined time or longer. A diagnostic unit configured to determine that the bearing device is abnormal when
To be equipped.
　好ましくは、前記第２温度センサは、前記軸受面を通過した後に滴下する潤滑油に接触する位置に配置されている。 Preferably, the second temperature sensor is arranged at a position where it comes into contact with the lubricating oil that drops after passing through the bearing surface.
　好ましくは、前記軸受装置は、内燃機関の動力伝達機構に設けられる。 Preferably, the bearing device is provided in the power transmission mechanism of the internal combustion engine.
　本開示の軸受装置の診断装置によれば、軸受装置の異常を即座に検出することができる。 According to the diagnostic device of the bearing device of the present disclosure, an abnormality of the bearing device can be detected immediately.
図１は、軸受装置の診断装置を示す概略図である。FIG. 1 is a schematic view showing a diagnostic device for a bearing device. 図２は、診断ルーチンのフローチャートである。FIG. 2 is a flowchart of the diagnostic routine.
　以下、添付図面を参照して本開示の実施形態を説明する。なお本開示は以下の実施形態に限定されない点に留意されたい。 Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the following embodiments.
　図１は、本実施形態に係る軸受装置の診断装置を示す概略図である。軸受装置は内燃機関（エンジンともいう）に適用され、特に、内燃機関においてクランクシャフトからカムシャフトに動力を伝達する動力伝達機構に適用される。本実施形態において、内燃機関は車両用ディーゼルエンジンであり、車両はトラック等の大型車両である。しかしながら、車両および内燃機関の種類、用途等は特に限定されない。 FIG. 1 is a schematic view showing a diagnostic device for a bearing device according to the present embodiment. Bearing devices are applied to internal combustion engines (also referred to as engines), and in particular, are applied to power transmission mechanisms that transmit power from a crankshaft to a camshaft in an internal combustion engine. In the present embodiment, the internal combustion engine is a diesel engine for a vehicle, and the vehicle is a large vehicle such as a truck. However, the types and uses of the vehicle and the internal combustion engine are not particularly limited.
　便宜上、前後左右上下の各方向を図示する通り定義する。但しこれら各方向が説明の便宜上定められたものに過ぎない点に留意されたい。本実施形態の場合、これら各方向は車両およびエンジンの各方向と一致する。 For convenience, each direction of front, back, left, right, up and down is defined as shown in the figure. However, it should be noted that each of these directions is only defined for convenience of explanation. In the case of the present embodiment, each of these directions coincides with each direction of the vehicle and the engine.
　軸受装置１は、エンジンブロック２の後面部に設けられる。エンジンブロック２には、シリンダブロック、クランクケースおよびシリンダヘッドが含まれ、本実施形態の軸受装置１はクランクケースに設けられる。軸受装置１は、歯車３と、歯車３を回転可能に支持するすべり軸受４と、すべり軸受４の軸受面５に潤滑油（一部を符号Ｏで示す）を供給する油路６とを備える。 The bearing device 1 is provided on the rear surface of the engine block 2. The engine block 2 includes a cylinder block, a crankcase, and a cylinder head, and the bearing device 1 of the present embodiment is provided in the crankcase. The bearing device 1 includes a gear 3, a slide bearing 4 that rotatably supports the gear 3, and an oil passage 6 that supplies lubricating oil (partially indicated by reference numeral O) to the bearing surface 5 of the slide bearing 4. ..
　歯車３は、本実施形態の場合アイドルギアであり、駆動力伝達方向上流側の上流側歯車７と、下流側の下流側歯車８との間に噛合され、配置されている。 The gear 3 is an idle gear in the case of the present embodiment, and is meshed and arranged between the upstream gear 7 on the upstream side in the driving force transmission direction and the downstream gear 8 on the downstream side.
　すべり軸受４は、ブッシュとも称される略円柱状の部材であり、歯車３の中心部に挿通される。すべり軸受４は、前後方向に延びる中心軸Ｃを有すると共に、その外周側の軸受面５により、歯車３の内周面９を回転可能にかつラジアル方向に支持する。これら軸受面５および内周面９により軸受部１０が形成される。すべり軸受４は、その中心部に挿通されるボルト１１によりエンジンブロック２の後面部に固定される。なおすべり軸受４とエンジンブロック２には、すべり軸受４をボルト１１で固定する際にすべり軸受４を回り止めする係合部（例えば溝と突起）が設けられる。 The slide bearing 4 is a substantially columnar member, also called a bush, and is inserted into the central portion of the gear 3. The slide bearing 4 has a central axis C extending in the front-rear direction, and the inner peripheral surface 9 of the gear 3 is rotatably and radially supported by the bearing surface 5 on the outer peripheral side thereof. The bearing portion 10 is formed by the bearing surface 5 and the inner peripheral surface 9. The slide bearing 4 is fixed to the rear surface portion of the engine block 2 by a bolt 11 inserted through the central portion thereof. The slide bearing 4 and the engine block 2 are provided with engaging portions (for example, grooves and protrusions) that prevent the slide bearing 4 from rotating when the slide bearing 4 is fixed by the bolt 11.
　すべり軸受４の前端部には、歯車３の前面部３Ａをスラスト方向に支持する鍔部１２が一体に形成されている。またボルト１１とすべり軸受４の間には、歯車３の後面部３Ｂをスラスト方向に支持するワッシャ１３が介設されている。 A flange portion 12 that supports the front end portion 3A of the gear 3 in the thrust direction is integrally formed at the front end portion of the slide bearing 4. A washer 13 that supports the rear surface portion 3B of the gear 3 in the thrust direction is interposed between the bolt 11 and the slide bearing 4.
　油路６は、エンジンブロック２の内部に形成されたブロック内油路１４と、すべり軸受４の内部に形成された軸受内油路１５とを備える。ブロック内油路１４の潤滑油流れ方向上流側には潤滑油溜めとしてのオイルギャラリ１６が設けられ、ブロック内油路１４にはオイルギャラリ１６から潤滑油が供給される。オイルギャラリ１６はエンジンブロック２（例えばクランクケース）の内部に形成されている。 The oil passage 6 includes an oil passage 14 in the block formed inside the engine block 2 and an oil passage 15 in the bearing formed inside the slide bearing 4. An oil gallery 16 as a lubricating oil reservoir is provided on the upstream side of the oil passage 14 in the block in the lubricating oil flow direction, and lubricating oil is supplied to the oil passage 14 in the block from the oil gallery 16. The oil gallery 16 is formed inside the engine block 2 (for example, a crankcase).
　軸受内油路１５は、Ｌ字状に形成され、その上流端がブロック内油路１４に接続されると共に、その下流端が軸受面５上で開放されている。これにより、オイルギャラリ１６からブロック内油路１４に供給された潤滑油が、軸受内油路１５を流れ、軸受部１０に供給される。そして軸受部１０が潤滑油により潤滑される。 The oil passage 15 in the bearing is formed in an L shape, its upstream end is connected to the oil passage 14 in the block, and its downstream end is open on the bearing surface 5. As a result, the lubricating oil supplied from the oil gallery 16 to the oil passage 14 in the block flows through the oil passage 15 in the bearing and is supplied to the bearing portion 10. Then, the bearing portion 10 is lubricated by the lubricating oil.
　その後潤滑油は、前側の鍔部１２と、歯車３の前面部３Ａとの間のスラスト摺動部を潤滑し、その後、歯車３の前面部３Ａを伝わって流れ落ち、符号Ｏで示す如く下方に滴下される。また潤滑油は、後側のワッシャ１３と、歯車３の後面部３Ｂとの間のスラスト摺動部を潤滑し、その後、歯車３の後面部３Ｂを伝わって流れ落ち、上流側歯車７との噛合部に供給されたり、下方に滴下されたりする。 After that, the lubricating oil lubricates the thrust sliding portion between the front flange portion 12 and the front portion 3A of the gear 3, and then flows down along the front portion 3A of the gear 3 and downwards as indicated by reference numeral O. Dropped. Further, the lubricating oil lubricates the thrust sliding portion between the washer 13 on the rear side and the rear surface portion 3B of the gear 3, and then flows down along the rear surface portion 3B of the gear 3 and meshes with the upstream gear 7. It is supplied to the unit or dropped downward.
　一方、診断装置５０は、軸受面５に供給される前の潤滑油の温度を検出する第１温度センサ５１と、軸受面５を通過した後の潤滑油の温度を検出する第２温度センサ５２と、軸受装置１が異常か否かを判定する診断ユニットとを備える。診断ユニットは、本実施形態の場合、エンジンを制御するための電子制御ユニット（ＥＣＵという）１００により構成される。ＥＣＵ１００は、第１温度センサ５１および第２温度センサ５２によりそれぞれ検出された温度の差が所定のしきい値以上であり、かつ、上記温度の差が所定のしきい値以上の状態が所定時間以上継続したときに、軸受装置１を異常と判断するように構成されている。 On the other hand, the diagnostic device 50 includes a first temperature sensor 51 that detects the temperature of the lubricating oil before being supplied to the bearing surface 5, and a second temperature sensor 52 that detects the temperature of the lubricating oil after passing through the bearing surface 5. And a diagnostic unit for determining whether or not the bearing device 1 is abnormal. In the case of this embodiment, the diagnostic unit is composed of an electronic control unit (referred to as an ECU) 100 for controlling the engine. The ECU 100 is in a state where the temperature difference detected by the first temperature sensor 51 and the second temperature sensor 52 is equal to or greater than a predetermined threshold value and the temperature difference is equal to or greater than a predetermined threshold value for a predetermined time. When the above is continued, the bearing device 1 is configured to be determined to be abnormal.
　第１温度センサ５１は、オイルギャラリ１６に設置され、オイルギャラリ１６内の潤滑油の温度を検出する。第２温度センサ５２は、軸受部１０より下方の位置に配置され、詳しくは、軸受部１０と前側のスラスト摺動部との潤滑を終え歯車３の前面部３Ａから滴下する潤滑油Ｏに接触する位置に配置されている。すなわち第２温度センサ５２は、歯車３の前面部３Ａの真下に配置されている。なお第２温度センサ５２は軸状に形成され、中心軸Ｃに垂直な向きで配置されて、図外の位置でエンジンブロック２に支持される。 The first temperature sensor 51 is installed in the oil gallery 16 and detects the temperature of the lubricating oil in the oil gallery 16. The second temperature sensor 52 is arranged at a position below the bearing portion 10. Specifically, the second temperature sensor 52 finishes lubrication between the bearing portion 10 and the thrust sliding portion on the front side and comes into contact with the lubricating oil O dripping from the front surface portion 3A of the gear 3. It is placed in the position to be used. That is, the second temperature sensor 52 is arranged directly below the front surface portion 3A of the gear 3. The second temperature sensor 52 is formed in an axial shape, is arranged in a direction perpendicular to the central axis C, and is supported by the engine block 2 at a position not shown in the drawing.
　これら第１温度センサ５１および第２温度センサ５２はＥＣＵ１００に接続される。またＥＣＵ１００には、車両のユーザー等に対して警告を行うための警告装置５３も接続されている。警告装置５３は、警告灯、アラーム、情報ディスプレイ等の任意のデバイスで構成することができる。 The first temperature sensor 51 and the second temperature sensor 52 are connected to the ECU 100. Further, a warning device 53 for giving a warning to a vehicle user or the like is also connected to the ECU 100. The warning device 53 can be configured by any device such as a warning light, an alarm, and an information display.
　さて、軸受装置１に潤滑不良による異常が生じると、歯車３がすべり軸受４に焼き付く等の故障に至る可能性がある。こうした故障に至る前に、軸受装置１の異常を即座に検出することが望まれる。 By the way, if an abnormality occurs in the bearing device 1 due to poor lubrication, there is a possibility that the gear 3 may seize on the slide bearing 4 or the like. It is desired to immediately detect an abnormality in the bearing device 1 before such a failure occurs.
　詳しくは、軸受装置１の軸受部１０に潤滑不良が生じる原因として、例えば、劣化した潤滑油の使用、あるいは歯車３を介して駆動される被駆動部品（補機等）の故障がある。かかる潤滑不良が生じると、軸受部１０における潤滑油の量が少なくなり、軸受部１０の摺動抵抗が高くなり、また、軸受部１０が発熱してその温度が上昇する。すると、歯車３がすべり軸受４に焼き付く故障に至る可能性がある。またこの焼き付きにより、エンジン自体が過負荷により故障する可能性もある。 Specifically, the cause of poor lubrication in the bearing portion 10 of the bearing device 1 is, for example, the use of deteriorated lubricating oil or the failure of a driven component (auxiliary machine or the like) driven via the gear 3. When such poor lubrication occurs, the amount of lubricating oil in the bearing portion 10 decreases, the sliding resistance of the bearing portion 10 increases, and the bearing portion 10 generates heat and its temperature rises. Then, there is a possibility that the gear 3 may seize on the slide bearing 4 and cause a failure. In addition, this seizure may cause the engine itself to fail due to overload.
　いずれにしても、歯車３が焼き付くとエンジンを分解整備したり、最悪エンジンを交換したりしなければならない重度の故障に陥る。本実施形態はこうした重度の故障に至る前に、軸受装置１の異常を予防保全的に即座に検出し、これを以て重度の故障に至る確率を大幅に低減するものである。 In any case, if the gear 3 is seized, the engine must be disassembled and maintained, or in the worst case, the engine must be replaced, resulting in a serious failure. In the present embodiment, the abnormality of the bearing device 1 is detected immediately for preventive maintenance before such a serious failure occurs, and the probability of a serious failure is greatly reduced by this.
　軸受部１０の潤滑不良が生じると、第１温度センサ５１により検出された第１温度Ｔ１に対し、第２温度センサ５２により検出された第２温度Ｔ２が大きく上昇する。軸受部１０を通過して第２温度センサ５２に滴下した潤滑油が正常時よりも高温だからである。よって本実施形態では、第１温度Ｔ１と第２温度Ｔ２の差すなわち温度差ΔＴ＝Ｔ２－Ｔ１が所定のしきい値ΔＴｓ以上であるときに、焼き付きの前兆があると判断し、このことを、軸受装置１を異常と判断するための第１条件としている。 When the bearing portion 10 is poorly lubricated, the second temperature T2 detected by the second temperature sensor 52 rises significantly with respect to the first temperature T1 detected by the first temperature sensor 51. This is because the lubricating oil that has passed through the bearing portion 10 and dropped onto the second temperature sensor 52 is higher than the normal temperature. Therefore, in the present embodiment, when the difference between the first temperature T1 and the second temperature T2, that is, the temperature difference ΔT = T2-T1 is equal to or greater than the predetermined threshold value ΔTs, it is determined that there is a sign of seizure, and this is determined. , The first condition for determining that the bearing device 1 is abnormal.
　一方、異常でないにも拘わらず何等かの原因で一時的に温度差ΔＴがしきい値ΔＴｓ以上に達することがある。本実施形態ではこうした場合に誤判定しないよう、温度差ΔＴがしきい値ΔＴｓ以上の状態が所定時間以上継続することを、軸受装置１を異常と判断するための第２条件としている。 On the other hand, the temperature difference ΔT may temporarily reach the threshold value ΔTs or more for some reason even though it is not abnormal. In the present embodiment, the second condition for determining the bearing device 1 as abnormal is that the state in which the temperature difference ΔT is equal to or greater than the threshold value ΔTs continues for a predetermined time or longer so as not to make an erroneous determination in such a case.
　温度差のしきい値ΔＴｓは、例えば、軸受部１０の潤滑不良が生じたときに実験的に求められる温度差ΔＴの最小値と等しい値に設定されている。また所定時間は、例えば、軸受部１０の潤滑不良が生じてないのに温度差ΔＴが一時的にしきい値ΔＴｓ以上となる時間であって、実験的に求められる時間の最大値に等しい値に設定されている。 The temperature difference threshold value ΔTs is set to a value equal to the minimum value of the temperature difference ΔT experimentally obtained when, for example, lubrication failure of the bearing portion 10 occurs. Further, the predetermined time is, for example, a time during which the temperature difference ΔT temporarily becomes the threshold value ΔTs or more even though the bearing portion 10 is not poorly lubricated, and is equal to the maximum value of the experimentally obtained time. It is set.
　次に、図２を参照して、本実施形態の診断のルーチンを説明する。図示するルーチンはＥＣＵ１００により所定の演算周期τ毎に繰り返し実行される。 Next, the diagnostic routine of this embodiment will be described with reference to FIG. The illustrated routine is repeatedly executed by the ECU 100 every predetermined calculation cycle τ.
　ステップＳ１０１において、ＥＣＵ１００は、第１温度センサ５１および第２温度センサ５２によりそれぞれ検出された第１温度Ｔ１および第２温度Ｔ２の値を取得する。 In step S101, the ECU 100 acquires the values of the first temperature T1 and the second temperature T2 detected by the first temperature sensor 51 and the second temperature sensor 52, respectively.
　ステップＳ１０２において、ＥＣＵ１００は、これら第１温度Ｔ１および第２温度Ｔ２の値から温度差ΔＴ＝Ｔ２－Ｔ１を算出する。 In step S102, the ECU 100 calculates the temperature difference ΔT = T2-T1 from the values of the first temperature T1 and the second temperature T2.
　ステップＳ１０３において、ＥＣＵ１００は、算出した温度差ΔＴが所定のしきい値ΔＴｓ以上か否かを判断する。 In step S103, the ECU 100 determines whether or not the calculated temperature difference ΔT is equal to or greater than a predetermined threshold value ΔTs.
　しきい値ΔＴｓ以上の場合、ＥＣＵ１００はステップＳ１０４に進み、内蔵タイマの値（タイマ値）ＴＭをカウントアップする。 When the threshold value is ΔTs or more, the ECU 100 proceeds to step S104 and counts up the value (timer value) TM of the built-in timer.
　次いでステップＳ１０５において、ＥＣＵ１００は、タイマ値ＴＭが、前記所定時間に相当する所定値ＴＭｓ以上か否かを判断する。 Next, in step S105, the ECU 100 determines whether or not the timer value TM is equal to or greater than the predetermined value TMs corresponding to the predetermined time.
　所定値ＴＭｓ以上の場合、ＥＣＵ１００はステップＳ１０６に進み、軸受装置１を異常と判断し、警告装置５３を起動（オン）してルーチンを終える。これにより車両のユーザー等に点検整備を促すことができる。 If the value is TMs or more, the ECU 100 proceeds to step S106, determines that the bearing device 1 is abnormal, activates (turns on) the warning device 53, and ends the routine. This makes it possible to encourage vehicle users and the like to perform inspections and maintenance.
　車両のユーザー等が、警告に反応して即座に点検整備を実施することにより、歯車３が実際に焼き付く前に、異常原因を調べて取り除くことができる。よって重度の故障に至る前にその原因を解消でき、重度の故障が発生する確率を大幅に低減することができる。 The vehicle user or the like responds to the warning and immediately carries out inspection and maintenance, so that the cause of the abnormality can be investigated and removed before the gear 3 is actually seized. Therefore, the cause can be eliminated before a serious failure occurs, and the probability of a serious failure can be significantly reduced.
　一方、ステップＳ１０５においてタイマ値ＴＭが所定値ＴＭｓ未満である場合、ＥＣＵ１００はそのままルーチンを終える。これによりタイマ値ＴＭは現状の値に保持される。 On the other hand, if the timer value TM is less than the predetermined value TMs in step S105, the ECU 100 ends the routine as it is. As a result, the timer value TM is held at the current value.
　また、ステップＳ１０３において温度差ΔＴがしきい値ΔＴｓ未満の場合、ＥＣＵ１００は、ステップＳ１０７に進んでタイマ値ＴＭをリセットした後、ルーチンを終える。 If the temperature difference ΔT is less than the threshold value ΔTs in step S103, the ECU 100 proceeds to step S107 to reset the timer value TM and then ends the routine.
　カウントアップ中のタイマ値ＴＭが所定値ＴＭｓ以上となる前に、ステップＳ１０３において温度差ΔＴがしきい値ΔＴｓ未満となり、タイマ値ＴＭがリセットされる場合がある。この場合とは、軸受装置１が正常なのに何等かの原因で温度差ΔＴが一時的にしきい値ΔＴｓ以上となり、その後しきい値ΔＴｓ未満に復帰した場合に該当する。そのためこの場合には、誤判定を防止すべくタイマ値ＴＭをリセットしてタイマ値ＴＭのカウントアップも停止する。 Before the timer value TM during count-up becomes equal to or higher than the predetermined value TMs, the temperature difference ΔT may become less than the threshold value ΔTs in step S103, and the timer value TM may be reset. This case corresponds to the case where the temperature difference ΔT temporarily becomes the threshold value ΔTs or more and then returns to the threshold value ΔTs even though the bearing device 1 is normal. Therefore, in this case, the timer value TM is reset to prevent erroneous determination, and the count-up of the timer value TM is also stopped.
　なおステップＳ１０６を実行しない場合、ＥＣＵ１００は実質的に、軸受装置１を異常でない、すなわち正常と判断することとなる。 If step S106 is not executed, the ECU 100 substantially determines that the bearing device 1 is not abnormal, that is, normal.
　このように本実施形態によれば、軸受装置１の異常を即座に検出することができる。そしてその異常に起因して重度の故障に発展するのを予め防止することができる。 As described above, according to the present embodiment, the abnormality of the bearing device 1 can be detected immediately. Then, it is possible to prevent the abnormality from developing into a serious failure in advance.
　以上、本開示の実施形態を詳細に述べたが、本開示の実施形態および変形例は他にも様々考えられる。 Although the embodiments of the present disclosure have been described in detail above, various other embodiments and modifications of the present disclosure can be considered.
　（１）例えば軸受装置は、内燃機関の動力伝達装置以外の部位に適用されてもよく、内燃機関以外の機械装置に適用されてもよい。 (1) For example, the bearing device may be applied to a part other than the power transmission device of the internal combustion engine, or may be applied to a mechanical device other than the internal combustion engine.
　（２）第１温度センサ５１および第２温度センサ５２の温度検出箇所は上記に限られない。例えば第１温度センサ５１は、オイルギャラリ１６とブロック内油路１４を接続する油路の潤滑油の温度を検出してもよく、ブロック内油路１４または軸受内油路１５の潤滑油の温度を検出してもよい。また第２温度センサ５２は、回転する歯車３から飛散した潤滑油Ｏに接触してその潤滑油Ｏの温度を検出してもよい。第２温度センサ５２は任意の高さ位置に配置可能であり、また、歯車３の前方または後方の位置に配置してもよい。 (2) The temperature detection points of the first temperature sensor 51 and the second temperature sensor 52 are not limited to the above. For example, the first temperature sensor 51 may detect the temperature of the lubricating oil in the oil passage connecting the oil gallery 16 and the oil passage 14 in the block, and may detect the temperature of the lubricating oil in the oil passage 14 in the block or the oil passage 15 in the bearing. May be detected. Further, the second temperature sensor 52 may come into contact with the lubricating oil O scattered from the rotating gear 3 and detect the temperature of the lubricating oil O. The second temperature sensor 52 can be arranged at an arbitrary height position, and may be arranged at a position in front of or behind the gear 3.
　本開示の実施形態は前述の実施形態のみに限らず、特許請求の範囲によって規定される本開示の思想に包含されるあらゆる変形例や応用例、均等物が本開示に含まれる。従って本開示は、限定的に解釈されるべきではなく、本開示の思想の範囲内に帰属する他の任意の技術にも適用することが可能である。 The embodiments of the present disclosure are not limited to the above-described embodiments, and all modifications, applications, and equivalents included in the idea of the present disclosure defined by the scope of claims are included in the present disclosure. Therefore, this disclosure should not be construed in a limited way and may be applied to any other technique that falls within the scope of the ideas of this disclosure.
　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2020-049750）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 (Japanese Patent Application No. 2020-049750) filed on March 19, 2020, the contents of which are incorporated herein by reference.
　本開示に係る軸受装置の診断装置は、軸受装置の異常を即座に検出する診断装置に広く適用することができる。 The bearing device diagnostic device according to the present disclosure can be widely applied to a diagnostic device that immediately detects an abnormality in the bearing device.
１　軸受装置
３　歯車
４　すべり軸受
５　軸受面
６　油路
５１　第１温度センサ
５２　第２温度センサ
１００　電子制御ユニット（ＥＣＵ）
Ｏ　潤滑油 1 Bearing device 3 Gear 4 Plain bearing 5 Bearing surface 6 Oil passage 51 First temperature sensor 52 Second temperature sensor 100 Electronic control unit (ECU)
O Lubricating oil

Claims (3)

  1. 　歯車と、前記歯車を回転可能に支持するすべり軸受と、前記すべり軸受の軸受面に潤滑油を供給する油路とを備えた軸受装置の診断装置であって、
    　前記軸受面に供給される前の潤滑油の温度を検出する第１温度センサと、
    　前記軸受面を通過した後の潤滑油の温度を検出する第２温度センサと、
    　前記第１温度センサおよび前記第２温度センサによりそれぞれ検出された温度の差が所定のしきい値以上であり、かつ、前記温度の差が前記所定のしきい値以上の状態が所定時間以上継続したときに、前記軸受装置を異常と判断するように構成された診断ユニットと、
    　を備えたことを特徴とする軸受装置の診断装置。     A diagnostic device for a bearing device including a gear, a slide bearing that rotatably supports the gear, and an oil passage that supplies lubricating oil to the bearing surface of the slide bearing.
    A first temperature sensor that detects the temperature of the lubricating oil before it is supplied to the bearing surface, and
    A second temperature sensor that detects the temperature of the lubricating oil after passing through the bearing surface, and
    The state in which the temperature difference detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value and the temperature difference is equal to or greater than the predetermined threshold value continues for a predetermined time or longer. A diagnostic unit configured to determine that the bearing device is abnormal when
    A diagnostic device for bearing devices.
  2. 　前記第２温度センサは、前記軸受面を通過した後に滴下する潤滑油に接触する位置に配置されている
    　請求項１に記載の軸受装置の診断装置。     The diagnostic device for a bearing device according to claim 1, wherein the second temperature sensor is arranged at a position where it comes into contact with a lubricating oil that drops after passing through the bearing surface.
  3. 　前記軸受装置は、内燃機関の動力伝達機構に設けられる
    　請求項１または２に記載の軸受装置の診断装置。     The diagnostic device for a bearing device according to claim 1 or 2, wherein the bearing device is provided in a power transmission mechanism of an internal combustion engine.
PCT/JP2021/010503 2020-03-19 2021-03-16 Diagnostic device for bearing device WO2021187452A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202180022438.8A CN115298473B (en) 2020-03-19 2021-03-16 Diagnostic device for bearing device

Applications Claiming Priority (2)

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JP2020-049750 2020-03-19
JP2020049750A JP7384085B2 (en) 2020-03-19 2020-03-19 Diagnostic device for bearing equipment

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163707U (en) * 1980-05-08 1981-12-04
JPS60205098A (en) * 1984-03-28 1985-10-16 Toshiba Corp Bearing lubricating sequential controller
JPS6449795A (en) * 1987-08-18 1989-02-27 Takano Corp Lubrication monitor for machine
JPH02204147A (en) * 1989-01-31 1990-08-14 Komatsu Ltd Monitoring device for vehicle
JPH05202930A (en) * 1991-03-15 1993-08-10 Osaka Gas Co Ltd Abnormality monitoring method and apparatus for bearing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4993688B2 (en) * 2006-11-15 2012-08-08 オークマ株式会社 Spindle lubricator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163707U (en) * 1980-05-08 1981-12-04
JPS60205098A (en) * 1984-03-28 1985-10-16 Toshiba Corp Bearing lubricating sequential controller
JPS6449795A (en) * 1987-08-18 1989-02-27 Takano Corp Lubrication monitor for machine
JPH02204147A (en) * 1989-01-31 1990-08-14 Komatsu Ltd Monitoring device for vehicle
JPH05202930A (en) * 1991-03-15 1993-08-10 Osaka Gas Co Ltd Abnormality monitoring method and apparatus for bearing

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CN115298473B (en) 2024-02-23
JP2021148227A (en) 2021-09-27

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