CN112628295A - Method for online replacement of lubricating grease of motor bearing - Google Patents
Method for online replacement of lubricating grease of motor bearing Download PDFInfo
- Publication number
- CN112628295A CN112628295A CN202110017090.5A CN202110017090A CN112628295A CN 112628295 A CN112628295 A CN 112628295A CN 202110017090 A CN202110017090 A CN 202110017090A CN 112628295 A CN112628295 A CN 112628295A
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- Prior art keywords
- lubricating grease
- motor
- bearing
- discharged
- color
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- F16N37/00—Equipment for transferring lubricant from one container to another
- F16N37/003—Equipment for transferring lubricant from one container to another for filling 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of 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
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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
- F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A method for on-line replacement of lubricating grease of a motor is suitable for the motor provided with an on-line oil drain hole and comprises the following steps: preparing; replacing lubricating grease; and (5) subsequent ending. The method reduces the bearing waste, reduces the maintenance cost of the motor, improves the economic benefit and the social benefit of enterprises, reduces the labor intensity of workers and improves the working efficiency.
Description
Technical Field
The invention relates to the technical field of motor maintenance in the mechanical industry, in particular to a method for replacing lubricating grease on line for a motor bearing.
Background
In the prior art, for the motor with the online oil injection device, after the motor runs for 30000-40000 hours or longer, the lubricating grease can be aged, the color of the lubricating grease becomes black, and the like, the lubricating agent gradually loses efficacy, the lubricating effect becomes poor, and the bearing failure can be caused by continuous running, so the lubricating grease needs to be supplemented or replaced regularly and quantitatively as required, and the supplementing or replacing way is matched with the motor for maintenance, which is generally: the motor is off-line; and cleaning the bearing, measuring whether the bearing clearance is normal or not, and listening whether the bearing sound is normal or not. If the sound of the hearing bearing is normal and the measured bearing clearance is qualified, replacing new lubricating grease and then reinstalling the motor; some enterprises directly replace new bearings, which not only causes great waste of bearing resources, but also needs more motor maintenance personnel, thus increasing the maintenance cost of the motor.
Disclosure of Invention
The invention aims to overcome the defects of long maintenance time and high maintenance cost in the prior art, and provides a method for replacing lubricating grease on line for a motor bearing, which adopts the technical scheme that: a method for on-line replacement of lubricating grease of a motor is suitable for the motor provided with an on-line oil drain hole and comprises the following steps: preparing:
1) checking the delivery date of the lubricating grease; checking whether the color of the lubricating grease is normal;
2) informing process or equipment personnel, submitting the process or equipment personnel to observe the running temperature of the bearing, and timely reporting and contacting when abnormality is found;
3) for the motor that lubricating grease was added at ordinary times the bearing operating temperature rose very fast and the total temperature of bearing surpassed 85 ℃, carry out physics cooling treatment in advance, include: pulling an industrial air or nitrogen rubber tube to the side of the motor needing to replace lubricating grease, opening an air source valve, and physically cooling a motor bearing; in places without air sources, a temporary cooling fan is connected to carry out forced cooling on the bearing;
replacing the lubricating grease:
opening an oil discharge hole of the motor, cleaning an oil filling hole of the motor, adding lubricating grease while observing the quantity and the color of the lubricating grease discharged by the motor, and if the discharged lubricating grease is darker in color or blackened, proving that the lubricating grease is invalid, continuously adding new lubricating grease until the color of the discharged lubricating grease is basically consistent with the color of the new lubricating grease, and finishing the work of online replacing the lubricating grease by the motor;
and (4) subsequent ending:
1) in motors with a dark color of discharged grease, attention should be paid to: the vibration meter and the frequency spectrograph are used for assisting in judging whether the motor bearing needs to be replaced or not, if the motor bearing is damaged after measurement, the motor bearing is judged, and meanwhile, the equipment has parking conditions and needs to be parked and replaced in time; if the motor bearing has damage signs, the motor bearing is temporarily not required to be stopped for replacing the bearing, and the lubricating grease is replaced on line frequently, until the color of the discharged lubricating grease is consistent with that of the new lubricating grease, the frequent online replacement of the lubricating grease can be temporarily slowed;
2) after the lubricating grease is replaced on line for many times, more waste lubricating grease is discharged, and the waste lubricating grease is cleaned regularly under the condition of well taking safety measures, so that the phenomenon that the waste lubricating grease discharged from a non-driving end blocks an air duct to cause poor heat dissipation of the motor is avoided.
The invention has the beneficial effects that: the method controls the running temperature of the motor bearing to be below 70 ℃ through timely updating of the lubricating grease, prolongs the running life of the bearing by about 20000-40000 hours or even longer than the traditional offline replacement of the lubricating grease of the motor, reduces the bearing waste, reduces the maintenance cost of the motor, improves the economic benefit and social benefit of enterprises, reduces the labor intensity of workers, improves the working efficiency and has wide popularization significance in the motor maintenance industry.
Detailed Description
The following describes a specific embodiment of the present invention.
The invention discloses a method for replacing lubricating grease of a motor on line, which is suitable for the motor with an on-line oil drain hole and comprises the following steps:
preparing:
1) checking the delivery date of the lubricating grease; checking whether the color of the lubricating grease is normal;
2) informing process or equipment personnel, submitting the process or equipment personnel to observe the running temperature of the bearing, and timely reporting and contacting when abnormality is found;
3) for the motor that lubricating grease was added at ordinary times the bearing operating temperature rose very fast and the total temperature of bearing surpassed 85 ℃, carry out physics cooling treatment in advance, include: pulling an industrial air or nitrogen rubber tube to the side of the motor needing to replace lubricating grease, opening an air source valve, and physically cooling a motor bearing; in places without air sources, a temporary cooling fan is connected to carry out forced cooling on the bearing;
replacing the lubricating grease:
opening an oil discharge hole of the motor, cleaning an oil filling hole of the motor, adding lubricating grease while observing the quantity and the color of the lubricating grease discharged by the motor, and if the discharged lubricating grease is darker in color or blackened, proving that the lubricating grease is invalid, continuously adding new lubricating grease until the color of the discharged lubricating grease is basically consistent with the color of the new lubricating grease, and finishing the work of online replacing the lubricating grease by the motor;
and (4) subsequent ending:
1) in motors with a dark color of discharged grease, attention should be paid to: the vibration meter and the frequency spectrograph are used for assisting in judging whether the motor bearing needs to be replaced or not, if the motor bearing is damaged after measurement, the motor bearing is judged, and meanwhile, the equipment has parking conditions and needs to be parked and replaced in time; if the motor bearing has damage signs, the motor bearing is temporarily not required to be stopped for replacing the bearing, and the lubricating grease is replaced on line frequently, until the color of the discharged lubricating grease is consistent with that of the new lubricating grease, the frequent online replacement of the lubricating grease can be temporarily slowed;
2) after the lubricating grease is replaced on line for many times, more waste lubricating grease is discharged, and the waste lubricating grease is cleaned regularly under the condition of well taking safety measures, so that the phenomenon that the waste lubricating grease discharged from a non-driving end blocks an air duct to cause poor heat dissipation of the motor is avoided.
Example 1:
taking the ice maker motor of the EVA device X-900A 1750HP as an example, the bearing temperature rises to 81 ℃ during use and has a tendency to continuously rise. The maintenance personnel of the motor are asked whether to refuel the motor and the maintenance personnel positively answer that no refuelling has taken place. If lubricating grease is added in the electric operation, the space of the bearing chamber becomes smaller because more lubricating grease is filled in the bearing chamber, and the temperature of the bearing is increased due to severe friction, which is logically speaking, and accords with the conventional principle. The problems now are that lubricating grease is not added into the motor, the temperature of the motor bearing is abnormally increased, the measured vibration data of the motor is qualified, and no abnormality is found in the sound of the bearing, which is the same thing.
The preliminary analysis is suspected that the lubricating grease of the motor is in a problem, and the lubricating grease is filled according to the regulations of a motor manufacturer by checking the oil filling record of the motor. Generally, the bearing heating condition is to carry out oil retaining, and the oil retaining is not feasible because a motor maintenance worker confirms that lubricating grease is not filled. The method is carried out in a reverse way, lubricating grease is filled on line, the color of the discharged lubricating grease is found to be black, preliminary analysis is carried out to suspect that the motor bearing lubricant is invalid, the lubricating grease replacement is continuously carried out on the X-900A motor, the temperature of the drive end bearing is increased in the oiling process, the drive end bearing is physically cooled by using a nearby nitrogen pipeline, and the temperature of the motor drive end bearing is controlled below 70 ℃. After the color of the lubricating grease discharged from the oil discharge hole of the motor is basically similar to that of the lubricating grease added, the operation is continued for a certain time, and after the temperature of the bearing of the motor starts to gradually decrease, the nitrogen pipeline valve is gradually closed until the bearing at the driving end of the motor is separated from an external cooling air source, and the temperature of the bearing of the motor is stabilized at about 60 ℃. The case finds that the lubricating grease is replaced on line by the motor, so that the lubricating environment of the motor bearing is well improved, and the motor bearing lubrication abnormality is repaired to a certain extent.
Example 2:
taking an air separation device (3000 KW 0714-C-1601) supercharger motor as an example, the motor is selected from a sliding bearing and lubricated by lubricating grease. After the equipment is overhauled for half a year, the running temperature of the bearing bush rises to 82 ℃, and the running temperature of the bearing bush also tends to rise along with the rise of the environmental temperature. Because the booster is a single unit, a booster shutdown will result in the entire air separation plant being shut down. If the bearing bush temperature continues to rise, the booster compressor can not continue to operate, the unit needs to be stopped and overhauled, and the production influence on the company is large. And an online oil filtering device is added to the supercharger lubricating system, so that real-time online oil filtering of the engine lubricating grease system is increased, and the lubricating grease quality is improved. After the supercharger is installed on the online oil filtering device, the temperature of the bearing bush is gradually reduced to about 65 ℃, the problem that the running temperature of the bearing bush of the supercharger is increased due to unclear reasons is solved, and the problem that the supercharger is stopped for maintenance due to the temperature increase of the bearing bush is avoided. Proved again, the online oil replacement can improve the lubrication quality of the bearing, has a certain repair function on the bearing with problems, and prolongs the service life of the bearing.
Through the 2 above embodiments, the online replacement of the lubricating grease of the motor is really very effective for the operation and maintenance of the motor, and has great popularization and practical values.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.
Claims (1)
1. A method for on-line replacement of lubricating grease of a motor is suitable for the motor provided with an on-line oil drain hole and comprises the following steps:
preparing:
1) checking the delivery date of the lubricating grease; checking whether the color of the lubricating grease is normal;
2) informing process or equipment personnel, submitting the process or equipment personnel to observe the running temperature of the bearing, and timely reporting and contacting when abnormality is found;
3) for the motor that lubricating grease was added at ordinary times the bearing operating temperature rose very fast and the total temperature of bearing surpassed 85 ℃, carry out physics cooling treatment in advance, include: pulling an industrial air or nitrogen rubber tube to the side of the motor needing to replace lubricating grease, opening an air source valve, and physically cooling a motor bearing; in places without air sources, a temporary cooling fan is connected to carry out forced cooling on the bearing;
replacing the lubricating grease:
opening an oil discharge hole of the motor, cleaning an oil filling hole of the motor, adding lubricating grease while observing the quantity and the color of the lubricating grease discharged by the motor, and if the discharged lubricating grease is darker in color or blackened, proving that the lubricating grease is invalid, continuously adding new lubricating grease until the color of the discharged lubricating grease is basically consistent with the color of the new lubricating grease, and finishing the work of online replacing the lubricating grease by the motor;
and (4) subsequent ending:
1) in motors with a dark color of discharged grease, attention should be paid to: the vibration meter and the frequency spectrograph are used for assisting in judging whether the motor bearing needs to be replaced or not, if the motor bearing is damaged after measurement, the motor bearing is judged, and meanwhile, the equipment has parking conditions and needs to be parked and replaced in time; if the motor bearing has damage signs, the motor bearing is temporarily not required to be stopped for replacing the bearing, and the lubricating grease is replaced on line frequently, until the color of the discharged lubricating grease is consistent with that of the new lubricating grease, the frequent online replacement of the lubricating grease can be temporarily slowed;
2) after the lubricating grease is replaced on line for many times, more waste lubricating grease is discharged, and the waste lubricating grease is cleaned regularly under the condition of well taking safety measures, so that the phenomenon that the waste lubricating grease discharged from a non-driving end blocks an air duct to cause poor heat dissipation of the motor is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017090.5A CN112628295A (en) | 2021-01-07 | 2021-01-07 | Method for online replacement of lubricating grease of motor bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017090.5A CN112628295A (en) | 2021-01-07 | 2021-01-07 | Method for online replacement of lubricating grease of motor bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112628295A true CN112628295A (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110017090.5A Pending CN112628295A (en) | 2021-01-07 | 2021-01-07 | Method for online replacement of lubricating grease of motor bearing |
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| Country | Link |
|---|---|
| CN (1) | CN112628295A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120061185A1 (en) * | 2010-09-10 | 2012-03-15 | Bsh Home Appliances Corporation | Bushing lubricator and system |
| CN102906971A (en) * | 2011-03-31 | 2013-01-30 | 株式会社小松制作所 | Lubricating structure for generator motor, and generator motor |
| CN204783794U (en) * | 2015-07-16 | 2015-11-18 | 重庆西泉泵业股份有限公司 | Pump bearing lubricating grease drain hole device |
| CN204879393U (en) * | 2015-07-28 | 2015-12-16 | 连云港天明装备有限公司 | Lubricating system is concentrated to coal -winning machine |
| CN212137497U (en) * | 2020-06-24 | 2020-12-11 | 联泓新材料科技股份有限公司 | Online oil discharge device of motor |
-
2021
- 2021-01-07 CN CN202110017090.5A patent/CN112628295A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120061185A1 (en) * | 2010-09-10 | 2012-03-15 | Bsh Home Appliances Corporation | Bushing lubricator and system |
| CN102906971A (en) * | 2011-03-31 | 2013-01-30 | 株式会社小松制作所 | Lubricating structure for generator motor, and generator motor |
| CN204783794U (en) * | 2015-07-16 | 2015-11-18 | 重庆西泉泵业股份有限公司 | Pump bearing lubricating grease drain hole device |
| CN204879393U (en) * | 2015-07-28 | 2015-12-16 | 连云港天明装备有限公司 | Lubricating system is concentrated to coal -winning machine |
| CN212137497U (en) * | 2020-06-24 | 2020-12-11 | 联泓新材料科技股份有限公司 | Online oil discharge device of motor |
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Application publication date: 20210409 |