WO2024010071A1 - 潤滑剤の供給制御方法、潤滑剤の供給制御装置、およびプログラム - Google Patents
潤滑剤の供給制御方法、潤滑剤の供給制御装置、およびプログラム Download PDFInfo
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- WO2024010071A1 WO2024010071A1 PCT/JP2023/025172 JP2023025172W WO2024010071A1 WO 2024010071 A1 WO2024010071 A1 WO 2024010071A1 JP 2023025172 W JP2023025172 W JP 2023025172W WO 2024010071 A1 WO2024010071 A1 WO 2024010071A1
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- oil film
- lubricant
- film thickness
- supply
- parts
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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
- G01M13/04—Bearings
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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
- 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
- F16N29/02—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 for influencing the supply of lubricant
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
- F16C33/6625—Controlling or conditioning the grease supply
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
- F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
-
- 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
-
- 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
- F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
-
- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
-
- 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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators
-
- 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
- F16N2210/00—Applications
- F16N2210/14—Bearings
Definitions
- the present invention relates to a lubricant supply control method, a lubricant supply control device, and a program.
- Patent Document 1 discloses a configuration in which the timing of replenishing grease to a bearing is controlled based on the integrated value of the rotational speed of the shaft and the time.
- Patent Document 2 discloses a configuration in which a DC power supply device is used in a method of monitoring the oil film state of a bearing device.
- an object of the present invention is to provide a lubricant supply control method that makes it possible to reduce torque and suppress wasteful lubricant consumption in a device that uses lubricant.
- a lubricant supply control method for an apparatus configured to lubricate a plurality of parts with a lubricant, a measuring step of measuring the impedance of the electric circuit by applying an alternating current voltage to the electric circuit made up of the plurality of parts; a deriving step of deriving the oil film thickness between the plurality of parts and the rupture rate of the oil film based on the impedance measured in the measuring step; Based on the oil film thickness and oil film rupture rate derived in the derivation step, the amount or timing of supply of the lubricant to the device so that the lubrication state between the plurality of parts becomes a predetermined lubrication state.
- a control step for controlling at least one of the has for controlling at least one of the has.
- the lubricant supply control device for a device configured to lubricate a plurality of parts with a lubricant, Measuring means for measuring the impedance of the electric circuit by applying an alternating current voltage to the electric circuit composed of the plurality of parts; Derivation means for deriving the oil film thickness between the plurality of parts and the rupture rate of the oil film based on the impedance measured by the measurement means; Based on the oil film thickness and oil film rupture rate derived by the derivation means, the amount or timing of supply of the lubricant to the device so that the lubrication state between the plurality of parts becomes a predetermined lubrication state.
- a control means for controlling at least one of the has.
- the program is to the computer, a measuring step of measuring the impedance of the electric circuit by applying an alternating current voltage to the electric circuit consisting of a plurality of parts lubricated with a lubricant in the device; a deriving step of deriving the oil film thickness between the plurality of parts and the rupture rate of the oil film based on the impedance measured in the measuring step; Based on the oil film thickness and oil film rupture rate derived in the derivation step, the amount or timing of supply of the lubricant to the device so that the lubrication state between the plurality of parts becomes a predetermined lubrication state.
- a control step for controlling at least one of the Execute.
- a lubricant that can reduce torque and suppress wasteful consumption of lubricant in a device that uses a lubricant.
- FIG. 1 is a schematic diagram showing an example of a device configuration according to an embodiment of the present invention.
- FIG. 3 is a graph diagram for explaining measurement results according to an embodiment of the present invention.
- 1 is a flowchart of lubricant supply control according to an embodiment of the present invention.
- a ball bearing will be used as an example of a rolling bearing included in a bearing device, but the present invention is not limited to this.
- the present invention is a device that can use a lubricant, and is also applicable to devices with other configurations that can appropriately supply the lubricant from the outside.
- types of rolling bearings to which the present invention is applicable include deep groove ball bearings, angular contact ball bearings, tapered roller bearings, cylindrical roller bearings, self-aligning roller bearings, and the like.
- the present invention is also applicable to other rolling devices, such as spindles.
- FIG. 1 is a schematic configuration diagram showing an example of the overall configuration of a system 1 that can execute lubricant supply control according to the present embodiment.
- the system 1 includes a control device 100, a state detection device 200, a rolling device 300, and a lubricant supply device 400.
- the control device 100 controls the state detection device 200, the rolling device 300, and the lubricant supply device 400, and acquires various information from each device.
- the state detection device 200 monitors the state of the rolling device 300 based on instructions from the control device 100, and detects changes in the state.
- the state detection device 200 uses an electrical method (more specifically, an electrical impedance method (EIM)) to determine the thickness of the oil film of the lubricant of the rolling device 300 and the breakage of the oil film. Detect presence, etc.
- the state detection device 200 may include a temperature sensor that detects the temperature of the rolling device 300 and other sensors.
- the rolling device 300 includes, for example, a rolling bearing (not shown) such as a ball bearing, and rotates based on instructions from the control device 100.
- the lubricant supply device 400 supplies lubricant to a predetermined portion of the rolling device 300 based on instructions from the control device 100.
- the lubricant supply device 400 may include, for example, a syringe pump.
- the control device 100 includes a state detection device control section 101, a rolling device control section 102, a supply device control section 103, a state monitoring section 104, a state notification section 105, and a history information management section 106.
- the state detection device control unit 101 causes the state detection device 200 to monitor the state of the rolling device 300, and obtains the detection results.
- the rolling device control unit 102 controls the operation of the rolling device 300 by driving a motor (not shown) to rotate or stop a rotating shaft (not shown) of the rolling device 300, for example. do.
- the supply device control unit 103 causes the lubricant supply device 400 to supply lubricant depending on the state of the lubricant in the rolling device 300.
- the condition monitoring section 104 monitors the condition of the rolling device 300 according to various detection results obtained via the condition detection device control section 101.
- the status notification unit 105 notifies the user of the results of monitoring by the status monitoring unit 104, the control results of each device, and the like. Although the notification method here is not particularly limited, it may be displayed on the screen via the display unit, or may be notified by voice or the like.
- the history information management unit 106 records and manages the results of monitoring by the status monitoring unit 104, the control results of each device, etc. as history information.
- the control device 100 may be realized, for example, by an information processing device including a control section, a storage section, and an output section (not shown).
- the control unit may include a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a DSP (Digital Single Processor), a dedicated circuit, or the like.
- the storage unit is composed of volatile and nonvolatile storage media such as HDD (Hard Disk Drive), ROM (Read Only Memory), and RAM (Random Access Memory), and input/output of various information is controlled by instructions from the control unit. It is possible.
- the output unit is comprised of a speaker, a light, a display device such as a liquid crystal display, etc., and outputs to the operator according to instructions from the control unit. Further, the output unit may be a network interface with a communication function, and may perform an output operation by transmitting data to an external device (not shown) via a network (not shown).
- control device 100 is composed of one device that controls the state detection device 200, the rolling device 300, and the lubricant supply device 400, but the invention is not limited to this. It's not a thing. Separate control devices may be provided for the state detection device 200, the rolling device 300, and the lubricant supply device 400, and these may be configured to cooperate.
- the rolling bearing rotatably supports the rotating shaft.
- the rotating shaft is supported by a housing that covers the outside of the rotating shaft via a rolling bearing that is a rotating component.
- a rolling bearing consists of an outer ring (outer member) that is a fixed ring fitted inside a housing, an inner ring (inner member) that is a rotating ring fitted around a rotating shaft, and a plurality of rings arranged between the inner ring and the outer ring. It is equipped with a plurality of balls (rollers) that are rolling elements, and a cage (not shown) that holds the rolling elements so that they can roll freely.
- the outer ring is fixed here, a structure in which the inner ring is fixed and the outer ring rotates may also be used.
- a seal which is a peripheral member, may be provided to prevent dirt from entering the vicinity of the rolling element and lubricating oil from leaking.
- a predetermined lubrication method reduces friction between the inner ring and the rolling elements and between the outer ring and the rolling elements.
- the lubrication method is not particularly limited, for example, grease lubrication, oil lubrication, etc. are used, and the lubricant is appropriately supplied to the inside of the rolling bearing through the process described below.
- the type of lubricant is also not particularly limited.
- the rotating shaft of the rolling device 300 is connected to an LCR meter provided in the state detection device 200 via a rotating connector (not shown).
- the rotary connector may be constructed using, for example, a carbon brush, but is not limited thereto.
- the rolling bearing of the rolling device 300 is also electrically connected to the LCR meter, and at this time, the LCR meter also functions as an AC power source for the rolling bearing.
- the state detection device control unit 101 of the control device 100 instructs the LCR meter to input the angular frequency ⁇ of the AC power supply and the AC voltage V, and outputs the LCR meter as an output.
- the impedance Z and phase angle ⁇ of the rolling device 300 are obtained from .
- the state monitoring unit 104 of the control device 100 detects information regarding the state of the lubricant in the rolling device 300 using these values.
- a specific method for detecting the state of the lubricant used in the configuration of this embodiment for example, the thickness of the lubricant oil film, the presence or absence of breakage of the oil film, etc.
- Japanese Patent No. 7099551 Japanese Patent No. 7099551
- FIG. 2A is a graph showing the relationship between the oil film thickness h [m] and the lubricant supply rate q [ ⁇ l/min] per unit time.
- FIG. 2(b) is a graph showing the relationship between the oil film rupture rate ⁇ [%] and the lubricant supply rate q [ ⁇ l/min] per unit time.
- FIG. 2(c) is a graph showing the relationship between the torque M [N mm] for rotating the rotating shaft of the rolling device 300 and the lubricant supply rate q [ ⁇ l/min] per unit time. be.
- the supply speed q [ ⁇ l/min] on the horizontal axis in FIGS. 2(a) to 2(c) corresponds to each other.
- oil film thickness h, oil film rupture rate ⁇ , etc. are results obtained based on the conventional electrical impedance method described in, for example, Japanese Patent No. 7099551.
- h c indicated by a broken line indicates the theoretical oil film thickness, and this state corresponds to a state in which no further lubrication is possible (hereinafter also referred to as "first lubrication state").
- the theoretical oil film thickness h c is described, for example, by Hamrock BJ and Dowson D. Isothermal elastohydrodynamic lubrication of point contacts: part III-fully flooded results. ASME Trans J Lubricat Technol 1977; 99: 264-275. I am familiar with It is assumed that lubricant is supplied to the rolling device 300 at a certain timing.
- the supply rate q shown on the horizontal axis of FIG. 2 indicates the supply rate indicating the amount of lubricant supplied per unit time.
- the oil film thickness h becomes close to the theoretical oil film thickness hc .
- the rupture rate ⁇ of the oil film becomes 0, and the contact between parts such as the inner ring and rolling elements is suppressed, and the possibility of rupture etc. is reduced. It gets lower.
- the torque M for rotating the rotating shaft of the rolling bearing becomes a high value. In this case, for example, the load on the motor becomes high, and efficiency decreases.
- the lubricant is supplied at a lubricant supply rate q such that the rupture rate ⁇ is 0 or approximately 0 and the oil film thickness h is thinner than the theoretical oil film thickness hc . supply control.
- the lubricant is supplied so that the oil film thickness is h as shown at point 202 in FIG. 2(a) (hereinafter also referred to as "second lubrication state").
- the rupture rate ⁇ of the oil film becomes approximately 0.
- the torque M also has a value lower than points 223 and 224 corresponding to the theoretical oil film thickness hc , and furthermore, it is lower than the point 221 where contact between parts occurs. is also low.
- FIG. 3 is a flowchart of lubricant supply control according to this embodiment. This process is executed by the control device 100, and for example, a control (not shown) provided in the control device 100 reads a program for realizing the process according to the present embodiment from a storage unit (not shown) and executes the program. It may be realized.
- a control not shown
- FIG. 1 each part of the control device 100 shown in FIG. 1 is assumed to perform the process in cooperation, but here, in order to simplify the explanation, the main body of processing will be collectively described as the control device 100.
- control device 100 causes the rolling device 300 to start rotating. At this time, control may be performed so that a constant load (for example, axial load) is applied. Note that the control for applying the load may be performed by a device different from the control device 100.
- a constant load for example, axial load
- the control device 100 causes the state detection device 200 to detect the state of the rolling device 300, and obtains the detection result.
- the AC voltage V of the angular frequency ⁇ is applied to the rolling device 300 using the AC power supply of the LCR meter, and as a result, impedance information (complex impedance Z, phase angle ⁇ , etc.) is obtained.
- the control device 100 acquires the operation information of the rolling device 300 at that time.
- the operational information includes, for example, the load applied to the rolling device 300, the rotational speed, the specifications of the rolling bearings that make up the rolling device 300, the temperature acquired by a temperature sensor, the type and characteristics of the lubricant, etc. may be included.
- control device 100 uses the electrical impedance method such as the method described in Japanese Patent No. 7099551 to determine the lubrication state (oil film thickness h, rupture rate ⁇ , etc.).
- the control device 100 determines whether or not a rupture of the oil film has been detected based on the rupture rate ⁇ derived in S304.
- the case where the breakage of the oil film is detected may be, for example, the case where the breakage rate ⁇ is larger than a predetermined threshold value.
- the threshold value for the rupture rate ⁇ is defined in advance and stored in a storage unit or the like. If a break in the oil film is detected (YES in S305), the process of the control device 100 proceeds to S308. On the other hand, if breakage of the oil film is not detected (NO in S305), the process of the control device 100 proceeds to S306.
- the control device 100 determines whether or not the lubrication is in an excessive lubrication state, that is, in the first lubrication state described above, based on the oil film thickness h derived in S304. The determination here may be made based on whether the oil film thickness range corresponding to the second lubrication state described above is set in advance and the derived oil film thickness h falls within that range. As described above, if the oil film thickness h exceeds the set range, there will be no problem with lubrication, but the torque M will increase, which may impede efficient operation. If the lubrication is excessive (YES in S306), the process of the control device 100 returns to S302 and repeats the process.
- control device 100 may continue the process of S302 after a certain waiting time (for example, 1 minute, 5 minutes, 10 minutes, etc.). If the lubrication is not excessive (NO in S306), the process of the control device 100 proceeds to S307.
- a certain waiting time for example, 1 minute, 5 minutes, 10 minutes, etc.
- the control device 100 instructs the lubricant supply device 400 to supply lubricant to the rolling device 300, and executes lubricant supply control.
- a predefined constant supply amount may be used as the supply amount, or a value that fluctuates depending on the comparison result with the threshold value in S305 and S306 may be used.
- the process returns to S302 and repeats the process.
- the control device 100 may continue the process of S302 after a certain waiting time (for example, 1 minute, 5 minutes, 10 minutes, etc.). Note that in this step, when a constant supply amount is used, a configuration may be adopted in which the waiting time here is adjusted.
- the standby time may be extended. That is, the timing of the next measurement using the electrical impedance method may be controlled based on the difference between the derived oil film thickness h and the theoretical oil film thickness hc . This makes it possible to suppress the frequency of unnecessary measurements and derivation processing depending on the oil film thickness at a certain point in time, and to reduce the processing load.
- control device 100 controls the rolling device 300 to stop its rotational operation. Even though the supply of lubricant is controlled, if the oil film rupture rate ⁇ exceeds a certain threshold value, the rotational operation may be stopped as it is assumed that there is some abnormality.
- control device 100 notifies the user that the rotational operation of the rolling device 300 has been stopped using a predetermined method. Then, this processing flow ends.
- the rotational operation of the rolling device 300 is controlled to be stopped based on the oil film rupture rate ⁇ , but the present invention is not limited to this. Further, for example, if the lubricant supply device 400 is unable to supply lubricant (for example, the lubricant that can be supplied is exhausted or the supply portion is damaged), the rotational operation of the rolling device 300 is controlled to be stopped. You may.
- lubricant supply control is performed using the oil film thickness h and the oil film rupture rate ⁇
- the supply control may be performed using the ratio between the theoretical oil film thickness hc and the oil film thickness h derived from the measured value.
- at least one of the supply amount and supply timing (supply frequency) of the lubricant may be controlled so that the oil film thickness ratio falls within a predetermined threshold range.
- this embodiment enables more accurate lubricant supply control. As a result, it is possible to prevent seizure and damage to parts due to lack of lubricant in the rolling device.
- a program or application for realizing the functions of one or more embodiments described above is supplied to a system or device using a network or a storage medium, and one or more computers of the system or device are provided with a program or an application.
- This can also be realized by a process in which a processor reads and executes a program.
- circuit that realizes one or more functions (for example, an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array)).
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- the present invention is not limited to the embodiments described above, and those skilled in the art can combine the configurations of the embodiments with each other, modify and apply them based on the description of the specification and well-known techniques. It is also contemplated by the present invention to do so, and is within the scope for which protection is sought.
- a lubricant supply control method for an apparatus configured to lubricate a plurality of parts with a lubricant comprising: a measuring step of measuring the impedance of the electric circuit by applying an alternating current voltage to the electric circuit made up of the plurality of parts; a deriving step of deriving the oil film thickness between the plurality of parts and the rupture rate of the oil film based on the impedance measured in the measuring step; Based on the oil film thickness and oil film rupture rate derived in the derivation step, the amount or timing of supply of the lubricant to the device so that the lubrication state between the plurality of parts becomes a predetermined lubrication state.
- a control step for controlling at least one of the A supply control method characterized by having the following. According to this configuration, it is possible to supply lubricant that enables low torque and suppression of wasteful consumption of lubricant in a device that uses lubricant.
- the predetermined lubrication state is characterized in that the rupture rate of the oil film is 0 or approximately 0, and the oil film thickness is smaller than the theoretical oil film thickness between the plurality of parts.
- the supply control method according to (1) According to this configuration, it is possible to control the supply of lubricant that can reduce torque while suppressing breakage of the oil film.
- the timing of measurement in the next measurement step is controlled based on the difference between the oil film thickness derived in the derivation step and the theoretical oil film thickness (2) )
- the supply control method described in it is possible to control the measurement timing based on the oil film thickness and suppress the processing load related to measurement.
- the device is a bearing device,
- the lubricant supply control device for a device configured to lubricate a plurality of parts with a lubricant, Measuring means for measuring the impedance of the electric circuit by applying an alternating current voltage to the electric circuit made up of the plurality of parts; Derivation means for deriving the oil film thickness between the plurality of parts and the rupture rate of the oil film based on the impedance measured by the measurement means; Based on the oil film thickness and oil film rupture rate derived by the derivation means, the amount or timing of supply of the lubricant to the device so that the lubrication state between the plurality of parts becomes a predetermined lubrication state.
- a control means for controlling at least one of the A supply control device comprising: According to this configuration, it is possible to supply a lubricant that enables low torque and suppression of wasteful lubricant consumption in a device that uses a lubricant.
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Abstract
Description
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を有する。
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定手段と、
前記測定手段にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出手段と、
前記導出手段にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御手段と、
を有する。
コンピュータに、
装置内の潤滑剤にて潤滑される複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を実行させる。
以下、本発明の第1の実施形態について説明を行う。なお、以下の説明においては、軸受装置が備える転がり軸受として玉軸受を例に挙げて説明するが、これに限定するものではない。本発明は、潤滑剤を利用可能な装置であって、適宜外部から潤滑剤が供給可能な他の構成の装置にも適用可能である。例えば、本発明が適用可能な転がり軸受の種類としては、深溝玉軸受、アンギュラ玉軸受、円錐ころ軸受、円筒ころ軸受、自動調心ころ軸受などが挙げられる。更には、本発明は、そのほかの転動装置、例えば、スピンドルなどにも適用可能である。
図1は、本実施形態に係る潤滑剤の供給制御を実行可能なシステム1の全体構成の一例を示す概略構成図である。システム1は、制御装置100、状態検出装置200、転動装置300、および潤滑剤供給装置400を含んで構成される。制御装置100は、状態検出装置200、転動装置300、および潤滑剤供給装置400を制御したり、各装置から各種情報を取得したりする。
図2を用いて、本実施形態に係る潤滑状態の例について説明する。図2(a)は、油膜厚さh[m]と単位時間当たりの潤滑剤の供給速度q[μl/min]の関係を示すグラフ図である。図2(b)は、油膜の破断率α[%]と単位時間当たりの潤滑剤の供給速度q[μl/min]の関係を示すグラフ図である。図2(c)は、転動装置300が備える回転軸を回転させるためのトルクM[N・mm]と潤滑剤の単位時間当たりの供給速度q[μl/min]の関係を示すグラフ図である。図2(a)~図2(c)の横軸の供給速度q[μl/min]は対応している。
図3は、本実施形態に係る潤滑剤の供給制御のフローチャートである。本処理は、制御装置100により実行され、例えば、制御装置100が備える制御(不図示)が本実施形態に係る処理を実現するためのプログラムを記憶部(不図示)から読み出して実行することにより実現されてよい。本処理フローは、図1に示す制御装置100の各部位が連携して処理を行うものとするが、ここでは説明を簡略化するために、処理主体を制御装置100としてまとめて記載する。
また、本発明において、上述した1以上の実施形態の機能を実現するためのプログラムやアプリケーションを、ネットワーク又は記憶媒体等を用いてシステム又は装置に供給し、そのシステム又は装置のコンピュータにおける1つ以上のプロセッサがプログラムを読出し実行する処理でも実現可能である。
(1) 複数の部位を潤滑剤にて潤滑させる構成の装置に対する前記潤滑剤の供給制御方法であって、
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を有することを特徴とする供給制御方法。
この構成によれば、潤滑剤を用いる装置における低トルク化および無駄な潤滑剤の消費の抑制を可能とする潤滑剤の供給が可能となる。
この構成によれば、油膜の破断を抑制しつつ、少トルク化を実現可能な潤滑剤の供給制御が可能となる。
この構成によれば、油膜厚さに基づいて、測定タイミングを制御し、測定に係る処理負荷を抑制することが可能となる。
この構成によれば、転動装置を対象として、潤滑剤の供給制御が可能となる。
前記複数の部位は、外方部材、内方部材、および転動体を含む
ことを特徴とする(1)から(3)のいずれかに記載の供給制御方法。
この構成によれば、軸受装置を対象とし、転動体周りの潤滑剤の供給制御が可能となる。
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定手段と、
前記測定手段にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出手段と、
前記導出手段にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御手段と、
を有することを特徴とする供給制御装置。
この構成によれば、潤滑剤を用いる装置における低トルク化および無駄な潤滑剤の消費の抑制を可能とする潤滑剤の供給が可能となる。
装置内の潤滑剤にて潤滑される複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を実行させるためのプログラム。
この構成によれば、潤滑剤を用いる装置における低トルク化および無駄な潤滑剤の消費の抑制を可能とする潤滑剤の供給が可能となる。
100 制御装置
101 状態検出装置制御部
102 転動装置制御部
103 供給装置制御部
104 状態監視部
105 状態報知部
106 履歴情報管理部
200 状態検出装置
300 転動装置
400 潤滑剤供給装置
Claims (7)
- 複数の部位を潤滑剤にて潤滑させる構成の装置に対する前記潤滑剤の供給制御方法であって、
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を有することを特徴とする供給制御方法。 - 前記所定の潤滑状態は、前記油膜の破断率が0または略0であり、かつ、前記油膜厚さが前記複数の部位の間における理論油膜厚さよりも小さい状態である、ことを特徴とする請求項1に記載の供給制御方法。
- 前記制御工程において、前記導出工程にて導出した油膜厚さと、前記理論油膜厚さとの差分に基づいて、次回の前記測定工程における測定のタイミングを制御する、ことを特徴とする請求項2に記載の供給制御方法。
- 前記装置は、転動装置である、ことを特徴とする請求項1から3のいずれか一項に記載の供給制御方法。
- 前記装置は、軸受装置であり、
前記複数の部位は、外方部材、内方部材、および転動体を含む
ことを特徴とする請求項1から3のいずれか一項に記載の供給制御方法。 - 複数の部位を潤滑剤にて潤滑させる構成の装置に対する前記潤滑剤の供給制御装置であって、
前記複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定手段と、
前記測定手段にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出手段と、
前記導出手段にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御手段と、
を有することを特徴とする供給制御装置。 - コンピュータに、
装置内の潤滑剤にて潤滑される複数の部位から構成される電気回路に交流電圧を印加することにより、前記電気回路のインピーダンスを測定する測定工程と、
前記測定工程にて測定されたインピーダンスに基づいて、前記複数の部位の間の油膜厚さおよび油膜の破断率を導出する導出工程と、
前記導出工程にて導出した油膜厚さおよび油膜の破断率に基づき、前記複数の部位の間の潤滑状態が所定の潤滑状態となるように、前記装置への前記潤滑剤の供給量または供給タイミングの少なくとも一方を制御する制御工程と、
を実行させるためのプログラム。
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