KR20130027814A - Device and method for monitoring journal bearing - Google Patents

Device and method for monitoring journal bearing Download PDF

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Publication number
KR20130027814A
KR20130027814A KR1020110091276A KR20110091276A KR20130027814A KR 20130027814 A KR20130027814 A KR 20130027814A KR 1020110091276 A KR1020110091276 A KR 1020110091276A KR 20110091276 A KR20110091276 A KR 20110091276A KR 20130027814 A KR20130027814 A KR 20130027814A
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KR
South Korea
Prior art keywords
journal bearing
contact resistance
temperature
sensor
measured
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Application number
KR1020110091276A
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Korean (ko)
Inventor
송창규
김병휘
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주식회사에스티엑스종합기술원
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Priority to KR1020110091276A priority Critical patent/KR20130027814A/en
Publication of KR20130027814A publication Critical patent/KR20130027814A/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
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • 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
    • F16C17/243—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 related to temperature and heat, e.g. for preventing overheating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • 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
    • F16C2380/00—Electrical apparatus

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

PURPOSE: A device and a method for monitoring a journal bearing are provided to measure temperature resistance and contact resistance with respect to the driving journal bearing, thereby confirming the abnormal operation of the journal bearing on a real time basis. CONSTITUTION: A device(100) for monitoring a journal bearing comprises a temperature sensor(110), a contact resistance sensor(120), a processing unit(130), and a display unit(140). The temperature sensor is in contact with the journal bearing, thereby measuring the temperature of the journal bearing. The contact resistance sensor is in contact with the journal bearing to be electrically communicated, thereby measuring the contact resistance of the journal bearing. The processing unit generates driving state signals of the journal bearing. The display unit displays the operation state signals of the journal bearing to outside. [Reference numerals] (110) Temperature sensor; (120) Contact resistance sensor; (130) Determining unit; (140) Output unit

Description

DEVICE AND METHOD FOR MONITORING JOURNAL BEARING}

The present invention relates to an apparatus and a method for monitoring a journal bearing, and more particularly, to a journal bearing monitoring apparatus and a journal bearing monitoring method using the same, which can confirm abnormal operation of the journal bearing in real time.

Journal bearings are mechanical elements that support a cylindrical shaft and smoothly rotate the shaft in response to a load acting perpendicular to the shaft. In the journal bearing, the journal, which is the shaft portion that is in contact with the journal bearing, slides with an oil film therebetween on the metal surface that supports the shaft. Journal bearings have excellent ability to support loads because they distribute the load acting on the shaft on flat and wide metal surfaces. Therefore, the journal bearing is widely used as a bearing means for stably supporting a crank shaft of a marine engine that is rotated at high speed and subjected to a large load.

Journal bearings have various reasons, such as when the shaft is supported with misalignment, when the quality of the lubricating oil that forms the oil film is deteriorated or the injection amount is insufficient due to long time operation, etc. The operation state becomes unstable due to the settlement and the engine being out of position or the external shock or vibration being applied to the engine. Therefore, the journal of the shaft on the metal surface of the journal bearing is rotated or rotated while being in contact with a sufficient lubrication thickness, thereby increasing the frictional resistance and raising the temperature of the lubricating oil. If this condition persists, as shown in FIG. 1, the viscosity of the lubricating oil decreases as the temperature of the lubricating oil rises, and the oil film formed between the journal bearing and the shaft is destroyed. This causes defects such as pitting or scuffing on the metal surface of the journal bearing, which greatly damages the journal bearing, degrades the engine's ability to rotate the shaft, or stops the engine unexpectedly. An accident occurs.

In order to prevent such damage of the journal bearing, a technique for checking the operating state of the journal bearing has been proposed. As an example of the prior art which can check the operating state of the journal bearing, the Utility Model Registration No. 20-00334945 proposes a temperature measuring device of the journal bearing. The temperature measuring device of the journal bearing proposed in the patent document is installed a plurality of temperature sensors in the journal bearing, and by continuously measuring the temperature distribution on the metal surface of the journal bearing in operation to check the operating state of the journal bearing.

However, the journal bearing temperature measuring device proposed in the above patent document checks the operating state of the journal bearing based only on the temperature distribution on the metal surface irrespective of whether the journal bearing is in contact with the shaft. It is not possible to check whether the condition is correct, and there is a limit in accurately checking the abnormal operation of the journal bearing caused therefrom.

Utility Model Registration No. 20-0334945, November 24, 2003.

The present invention provides an apparatus and method for monitoring a journal bearing that can confirm abnormal operation of the journal bearing in real time by measuring temperature and contact resistance of the journal bearing in operation.

Journal bearing monitoring device according to an embodiment of the present invention is a device for monitoring the abnormal operation of the journal bearing accommodated in the housing to rotatably support the shaft, the temperature sensor for contacting the journal bearing to measure the temperature of the journal bearing And a contact resistance sensor contacting the journal bearing to be energized to measure contact resistance of the journal bearing, and comparing the temperature and contact resistance measured by the temperature sensor and the contact resistance sensor with a set reference temperature and contact resistance, respectively. And a processing unit for generating an operation state signal of the journal bearing and a display unit for displaying the operation state signal of the journal bearing to the outside.

The temperature sensor and the contact resistance sensor are respectively installed in the first mounting groove and the second mounting groove formed through the housing so as to contact the back metal of the journal bearing.

A spring for pushing the temperature sensor and the contact resistance sensor toward the outer circumferential surface of the back metal is provided in the first mounting groove and the second mounting groove.

The temperature sensor measures the temperature of the journal bearing, which is transferred and changed according to the temperature change of the lubricating oil injected between the journal bearing and the shaft.

The contact resistance sensor is in contact with the journal bearing while a voltage source is connected and energized, and measures the contact resistance of the journal bearing generated by contacting the shaft and the journal bearing to which the grounded variable resistor is connected.

The contact resistance sensor and the journal bearing are insulated from the housing.

The processor generates the driving state signal of the journal bearing as any one of a normal state signal, an intermediate state signal, and an abnormal state signal.

In addition, the journal bearing monitoring method according to an embodiment of the present invention is a method for monitoring the abnormal operation of the journal bearing accommodated in the housing rotatably supporting the shaft, measuring the temperature and contact resistance of the journal bearing, And comparing the measured temperature and the contact resistance with the set reference temperature and the contact resistance, respectively, to generate an operating state signal of the journal bearing, and displaying the operating state signal of the journal bearing to the outside.

Measuring the temperature and the contact resistance of the journal bearing is a step of measuring the temperature of the journal bearing is changed by heat transfer according to the temperature change of the lubricant injected between the journal bearing and the shaft, the journal to which the voltage source is connected And measuring contact resistance caused by the contact of the shaft to which the bearing and the grounded variable resistor are connected.

Generating an operation state signal of the journal bearing may include generating a steady state signal when the measured temperature and the measured contact resistance are less than the reference temperature and the reference contact resistance, and wherein the measured temperature and the measured contact resistance are the reference temperature. And generating an abnormal state signal when both reference contact resistances are exceeded, and generating an intermediate state signal when only one of the measured temperature and the measured contact resistance exceeds the reference temperature and the reference contact resistance. Include.

According to the journal bearing monitoring apparatus and method of the present invention, it is possible to measure the temperature and contact resistance of the journal bearing in operation through a temperature sensor and a contact resistance sensor installed to contact the journal bearing. In addition, the operating status signal of the journal bearing is displayed externally to compare the measured temperature and contact resistance with the set reference temperature and contact resistance, respectively, so that the abnormal operation of the journal bearing and the contact with the shaft can be confirmed in real time. . Therefore, a quick action can be taken in the abnormal operation of the journal bearing, preventing damage to the journal bearing and improving the service life of the journal bearing. In addition, it is possible to prevent breakage of the engine in which the journal bearing is employed, thereby improving operation reliability.

1 is a graph showing an example of a viscosity change according to the temperature change of the lubricating oil used in the journal bearing.
2 is a block diagram showing the configuration of a journal bearing monitoring apparatus according to an embodiment of the present invention.
3 is a view showing the installation state of the temperature sensor and the contact resistance sensor employed in the journal bearing monitoring apparatus according to an embodiment of the present invention.
Figure 4 is a circuit diagram of a contact resistance sensor employed in the journal bearing monitoring apparatus according to an embodiment of the present invention.
5 is a flowchart illustrating a journal bearing monitoring method according to an embodiment of the present invention.

Journal bearing monitoring apparatus according to the embodiment is employed in the journal bearing divided into sliding bearing (radial bearing) and radial bearing (radial bearing) can monitor the abnormal operation during operation of the journal bearing in real time. Furthermore, the journal bearing monitoring device according to the embodiment can be employed in a variety of bearings in which the shaft is rotatably supported in a lubricated state.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the journal bearing monitoring apparatus of the present invention.

2, the journal bearing monitoring apparatus 100 according to an embodiment of the present invention is accommodated in the housing 40, the journal rotatably supporting the shaft (20) with the lubricant 30 therebetween. It is a device for monitoring the operating state of the bearing 10, that is, the contact state between the journal bearing 10 and the shaft 20 in real time.

The journal bearing monitoring apparatus 100 according to this embodiment is in contact with the journal bearing 10 to measure the temperature of the journal bearing 10 and the contact resistance of the journal bearing 10 and the contact resistance of the journal bearing 10. The resistance sensor 120 is included. In addition, the processing unit for generating a signal for the operating state of the journal bearing 10 by comparing the temperature and contact resistance measured by the temperature sensor 110 and the contact resistance sensor 120 with the reference temperature and contact resistance set by the manager, respectively 130 and a display unit 140 to be displayed to the outside to inform the administrator of the operation status signal of the journal bearing 10.

As shown in FIG. 3, the journal bearing 10 rotatably supports a vertically loaded cylindrical shaft 20 and reduces the friction of the journal bearing 10 to reduce friction with the shaft 20. Lubricant 30 is injected between the metal face 11 and the journal 22 of the shaft 20.

The journal bearing 10 is formed of a back metal 12 supporting the shaft 20, and a metal alloy 11 formed on the inner circumferential surface of the back metal 12 is hard and has excellent fatigue resistance. A bearing alloy made of an alloy or the like is fusion formed. The back metal 12 and the bearing alloy have a high heat transfer rate and are formed of a metal material which is a conductor. The outer circumferential surface of the back metal 12 is fixed in position in close contact with the housing 40. Although not shown, an oil hole penetrating the back metal 12 may be formed in the journal bearing 10 to easily inject the lubricant 30, and the lubricant 30 having the lubricating action may be easily provided. Can be discharged to the outside. In addition, an oil groove may be formed in the metal surface 11 so that the lubricating oil 30 may be evenly distributed on the metal surface 11.

The housing 40 includes a bearing mounting hole (not shown) having a circular vertical cross-sectional shape corresponding to the shape and size of the journal bearing 10 so as to surround and support the back metal 12 of the journal bearing 10. ) Is formed to penetrate horizontally. The housing 40 may be formed in the form of a plurality of bearing caps or bearing beams.

The housing 40 is provided with a first mounting groove 44 for installing the temperature sensor 110 and a second mounting groove 46 for installing the contact resistance sensor 120. The first mounting groove 44 and the second mounting groove 46 are formed by passing through the housing 40 in a straight line toward the center portion of the housing 40, that is, the bearing mounting hole in which the journal bearing 10 is accommodated. Therefore, the temperature sensor 110 and the contact resistance sensor 120 may be inserted into the first mounting groove 44 and the second mounting groove 46 to be in contact with the outer circumferential surface of the back metal 12. The temperature sensor 110 and the contact resistance sensor 120 are inserted into the housing 40 by inserting the temperature sensor 110 and the contact resistance sensor 120 into the first mounting groove 44 and the second mounting groove 46. Springs 44a and 46a are provided to push the center portion of the spring sensor 110 and the contact resistance sensor 120 to easily contact the back metal 12 of the journal bearing 10.

The temperature sensor 110 measures the temperature of the journal bearing 10 while the shaft 20 is rotating, that is, during operation of the journal bearing 10. The back metal 12 and the bearing alloy of the journal bearing 10 are made of a metal having a high heat transfer rate, so that the temperature of the back metal 12 is also changed according to the temperature change of the lubricating oil 30. When the operating state of the journal bearing 10 is in a normal state, fluid friction occurs between the journal bearing 10 and the shaft 20. That is, the oil film of the lubricating oil 30 does not break between the metal surface 11 of the journal bearing 10 and the journal 22 of the shaft 20, and the journal 22 floats away from the metal surface 11 and is rubbed. No resistance is generated. That is, the temperature of the lubricating oil 30 does not rise during the operation of the journal bearing 10, and the temperature of the journal bearing 10 which receives heat transfer from the lubricating oil 30 does not increase. On the other hand, when there is a misalignment between the journal bearing 10 and the shaft 20, or the quality of the lubricating oil 30 is deteriorated and the injection amount is insufficient, or when an external shock or vibration is applied to an engine employing the journal bearing. When the cause, such as the lubrication thickness between the journal bearing 10 and the shaft 20 is not enough or the journal bearing 10 and the shaft 20 is in contact with the frictional resistance is increased, the lubricating oil 30 of the The temperature rises. In addition, the journal bearing 10 in contact with the lubricating oil 30 receives heat transfer to increase the temperature. Therefore, it is possible to monitor the operating state of the journal bearing 10 by measuring the temperature of the journal bearing 10.

In addition to the temperature sensor 110, a contact resistance sensor 120 is installed in the housing 40 to contact the journal bearing 10 in order to monitor the operating state of the journal bearing 10. The contact resistance sensor 120 measures contact resistance generated when the journal bearing 10 and the shaft 20 which are conductors contact each other. Here, the contact resistance means a resistance generated when two objects, which are conductors, make contact with each other so that the actual contact area is smaller than the apparent contact area. That is, the minute protrusions are formed on the surfaces of the two objects and are resistances generated when a current flows through the minute protrusions when the two objects contact each other. By measuring the contact resistance, it is possible to check the contact state between two objects, that is, the journal bearing 10 and the shaft 20.

The housing 40 is kept insulated from the journal bearing 10 and the contact resistance sensor 120 so that the contact resistance can be measured through the contact resistance sensor 120. As shown in FIG. 4, the contact resistance sensor 120 is in contact with the back metal 12 of the journal bearing 10 to be electrically energized. The voltage source 122 for supplying a constant voltage is connected to the contact resistance sensor 120, and the variable resistor 124 in a grounded state is connected to the shaft 20. In this embodiment, it is difficult to structurally connect the voltage source 122 to the journal bearing 10, so that the voltage source 122 is connected to the contact resistance sensor 120 which is in energized state with the journal bearing 10. In addition, although the voltage source 122 is connected to the contact resistance sensor 120 and the variable resistor 124 grounded to the shaft 20 is connected, the variable resistor 124 grounded to the contact resistance sensor 120 is connected to the contact resistance sensor 120. The voltage source 122 may be connected to the shaft 20.

When the operating state of the journal bearing 10 is normal or does not have a sufficient lubrication thickness out of the normal state, no current flows between them because the journal bearing 10 and the shaft 20 are not in contact. However, when the operating state of the journal bearing 10 is in an abnormal state, that is, when the journal bearing 10 and the shaft 20 are in contact with each other, the journal bearing 10 is electrically connected and positioned between the voltage source 122 and the variable resistor 124. The contact resistance is measured by the contact resistance sensor 120. As in this embodiment, the journal bearing 10 according to the contact state between the journal bearing 10 and the shaft 20 by confirming the operating state of the journal bearing 10 through the measurement of the temperature and at the same time by measuring the contact resistance. Can be monitored accurately.

The temperature and contact resistance simultaneously measured by the temperature sensor 110 and the contact resistance sensor 120 are transmitted to the processor 130. The reference temperature and reference contact resistance are respectively set by the manager in the processor 130, and the processor 130 compares the received measured temperature and contact resistance with the set reference temperature and contact resistance, respectively. Even when the journal bearing 10 and the shaft 20 do not contact when the journal bearing 10 is operated, the temperature of the lubricating oil 30 is increased due to various causes, such as deterioration of the quality of the lubricating oil 30 or insufficient filling amount. Can be. In addition, the contact bearing may be measured by temporarily contacting the journal bearing 10 and the shaft 20, for example, when external shock or vibration is applied to an engine to which the journal bearing 10 is employed. That is, in the case of measuring only the temperature of the journal bearing 10 or measuring the contact resistance, there is a limit in accurately determining the abnormal operation of the journal bearing 10. Therefore, in this embodiment, the temperature and contact resistance of the journal bearing 10 are simultaneously measured and the operating state of the journal bearing 10 is determined using the same.

In the processor 130, the operating state of the journal bearing 10 is determined to be one of a normal state, an abnormal state, and an intermediate state. In this embodiment, the processor 130 determines the operating state of the journal bearing 10 as a normal state when the measured temperature is below the reference temperature and the measured contact resistance is below the reference contact resistance, that is, when the measured values are all below the reference value. do. In addition, when the measured temperature exceeds the reference temperature and the measured contact resistance exceeds the reference contact resistance, that is, when all the measured values exceed the reference value, the operation state of the journal bearing 10 is determined as an abnormal state. In addition, when the measured temperature exceeds the reference temperature but the measured contact resistance is below the reference contact resistance or the measured contact resistance exceeds the reference contact resistance but the measured temperature is below the reference temperature, the operation state of the journal bearing 10 is brought into an abnormal state. Judging by the intermediate state with the possibility of development. Through the comparison of the measured value and the reference value, the processor 130 generates an operation state signal of the journal bearing 10, that is, a signal of any one of a steady state signal, an abnormal state signal, and an intermediate state signal, to the display unit 140. send.

The display unit 140 displays the driving state signal of the journal bearing 10 to the outside to inform the manager. The display unit 140 includes a display such as a plurality of LED flashing lights, a monitor, etc. to visually check the driving state signal of the journal bearing 10, and a warning sound or a notification so as to check the driving state of the journal bearing 10 by sound. And a speaker for generating sound. When the operation state of the journal bearing 10 is an abnormal state through the display unit 140, a forced driving stop signal is displayed, and in the case of an intermediate state, a warning signal is displayed to allow the manager to control the driving of the engine. can do.

Hereinafter, an embodiment of a journal bearing monitoring method using a journal bearing monitoring apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 5, the journal bearing monitoring method according to an embodiment of the present invention includes simultaneously measuring the temperature and contact resistance of the journal bearing during operation of the journal bearing (S110), and setting the measured temperature and contact resistance. And determining an operating state of the journal bearing (S120) by comparing the temperature and contact resistance, respectively, and displaying the determined operating state of the journal bearing to the outside (S130).

The temperature and contact resistance of the journal bearing in operation is measured by means of a temperature sensor and a contact resistance sensor installed in the housing so as to contact the journal bearing. Since the temperature of the lubricant injected between the journal bearing and the shaft cannot be measured directly by the temperature sensor, the temperature sensor indirectly measures the temperature of the lubricant by measuring the temperature of the journal bearing changed through heat transfer from the lubricant. In addition, the contact resistance between the journal bearing and the shaft made of a conductor is measured through a contact resistance sensor connected to the energized state between the journal bearing and the shaft (S110).

Thereafter, the temperature and the contact resistance measured in the journal bearing are transmitted to the processing unit, and compared with the reference temperature and the reference contact resistance set in the processing unit by the manager (S121, S122, S123), respectively. When the comparison of the measured temperature and contact resistance with the reference temperature and contact resistance is completed, the processor determines the operating state of the journal bearing as one of a normal state, an abnormal state, and an intermediate state (S124, S125, and S126). ). In this embodiment, it is determined that the operation state of the journal bearing is in an abnormal state when the measured temperature exceeds the reference temperature and the measured contact resistance exceeds the reference contact resistance (S124). In addition, when the measured temperature is equal to or less than the reference temperature and the measured contact resistance is equal to or less than the reference contact resistance, the operation state of the journal bearing is determined as normal (S125). In addition, when either the measured temperature and the contact resistance is greater than the reference temperature and the contact resistance, that is, when the measured temperature exceeds the reference temperature and the measured contact resistance is below the reference contact resistance, and the measured temperature is below the reference temperature and the measured contact resistance In any case of exceeding the reference contact resistance, the operation state of the journal bearing is determined as an intermediate state (S126).

When the driving state of the journal bearing as described above is determined, the determined driving state of the journal bearing is displayed to the outside through an image or an audio (S130). If the operation state of the journal bearing is in a normal state, a normal signal is displayed. If the operation state of the journal bearing is in an abnormal state, a forced driving stop signal is displayed. In addition, when the operating state of the journal bearing is in an intermediate state, a warning signal indicating that the temperature or contact resistance is measured is displayed. The manager can damage the journal bearing by quickly finding the cause of the journal bearing's operation, ie, stopping the operation of the journal bearing or causing the journal bearing to malfunction through the operation status signal of the marked journal bearing. Can be prevented.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It will be obvious to those of ordinary skill in the art.

10: journal bearing 20: shaft
30: lubricant 40: housing
100: journal bearing monitoring device 110: temperature sensor
120: contact resistance sensor 130: processing unit
140:

Claims (10)

A device for monitoring the abnormal operation of the journal bearing accommodated in the housing to rotatably support the shaft,
A temperature sensor contacting the journal bearing to measure a temperature of the journal bearing;
A contact resistance sensor in contact with the journal bearing so as to be energized to measure contact resistance of the journal bearing;
A processing unit for generating an operation state signal of the journal bearing by comparing the temperature and the contact resistance measured by the temperature sensor and the contact resistance sensor with a set reference temperature and contact resistance, respectively;
Display unit for displaying the operation state signal of the journal bearing to the outside
Journal bearing monitoring device comprising a. The method of claim 1,
And the temperature sensor and the contact resistance sensor are respectively installed in the first and second mounting grooves formed through the housing so as to contact the back metal of the journal bearing. The method of claim 2,
And a spring for pushing the temperature sensor and the contact resistance sensor toward the outer circumferential surface of the back metal in the first mounting groove and the second mounting groove. The method of claim 1,
The temperature sensor is a journal bearing monitoring device for measuring the temperature of the journal bearing is changed by heat transfer in accordance with the temperature change of the lubricating oil injected between the journal bearing and the shaft. The method of claim 1,
The contact resistance sensor is a journal bearing monitoring device for measuring the contact resistance of the journal bearing is generated by contacting the shaft and the journal bearing is connected to the journal bearing is energized while the voltage source is connected, . The method of claim 5,
And the contact resistance sensor and the journal bearing are insulated from the housing. The method of claim 1,
And the processing unit generates an operation state signal of the journal bearing as any one of a normal state signal, an intermediate state signal, and an abnormal state signal. A method of monitoring the abnormal operation of the journal bearing accommodated in the housing to rotatably support the shaft,
Measuring the temperature and contact resistance of the journal bearing;
Generating an operating state signal of the journal bearing by comparing the measured temperature and contact resistance with a set reference temperature and contact resistance, respectively;
Displaying an operation state signal of the journal bearing to the outside
Journal bearing monitoring method comprising a. 9. The method of claim 8,
Measuring the temperature and contact resistance of the journal bearing,
Measuring a temperature of the journal bearing which is transferred and changed in accordance with a temperature change of the lubricating oil injected between the journal bearing and the shaft, and in contact with the shaft to which the grounding variable resistor is connected to the journal bearing to which a voltage source is connected. Journal bearing monitoring method comprising the step of measuring the contact resistance generated by. 9. The method of claim 8,
Generating an operation state signal of the journal bearing,
Generating a steady state signal when the measured temperature and the measured contact resistance are below the reference temperature and the reference contact resistance; and an abnormal state when the measured temperature and the measured contact resistance exceed both the reference temperature and the reference contact resistance. Generating a signal, and generating an intermediate state signal when only one of the measured temperature and the measured contact resistance exceeds the reference temperature and the reference contact resistance.
KR1020110091276A 2011-09-08 2011-09-08 Device and method for monitoring journal bearing KR20130027814A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140126970A (en) 2013-04-24 2014-11-03 현대중공업 주식회사 Measuring structure of lubricating capacity for main bearing
KR20160113891A (en) * 2015-03-23 2016-10-04 한화테크윈 주식회사 Installation structure for temperature sensor cable
US20190195284A1 (en) * 2017-12-22 2019-06-27 Mitsubishi Heavy Industries Compressor Corporation Journal bearing, rotary machine, and journal bearing-manufacturing method
DE102018216618A1 (en) * 2018-09-27 2020-04-02 Zf Friedrichshafen Ag Measuring arrangement for lubricant

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140126970A (en) 2013-04-24 2014-11-03 현대중공업 주식회사 Measuring structure of lubricating capacity for main bearing
KR20160113891A (en) * 2015-03-23 2016-10-04 한화테크윈 주식회사 Installation structure for temperature sensor cable
US20190195284A1 (en) * 2017-12-22 2019-06-27 Mitsubishi Heavy Industries Compressor Corporation Journal bearing, rotary machine, and journal bearing-manufacturing method
US10612600B2 (en) * 2017-12-22 2020-04-07 Mitsubishi Heavy Industries Compressor Corporation Journal bearing, rotary machine, and journal bearing-manufacturing method
DE102018216618A1 (en) * 2018-09-27 2020-04-02 Zf Friedrichshafen Ag Measuring arrangement for lubricant
WO2020064199A1 (en) 2018-09-27 2020-04-02 Zf Friedrichshafen Ag Measuring arrangement for lubricant
US11566700B2 (en) 2018-09-27 2023-01-31 Zf Friedrichshafen Ag Measuring arrangement for lubricant

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