The Importance Of Understanding The Chemical Properties Of Grease For Practical Use
The Importance Of Understanding The Chemical Properties Of Grease For Practical Use
2022年3月1日
Troubleshooting Of Abnormal Sound Of Koyo Deep Groove Ball Bearing Maintenance Of Lubricating Grease
Troubleshooting Of Abnormal Sound Of Koyo Deep Groove Ball Bearing Maintenance Of Lubricating Grease
2022年3月2日

The Important Role Of Maintenance Leading To Overheating Of Koyo One-Way Bearing

Koyo One-Way Bearing

Koyo bearing shows the characteristics of late failure. The time from the occurrence of serious failure (generally bearing damage, such as shaft holding, burn, sand Koyo One-Way Bearing frame crack, raceway, bead wear, etc.) is mostly less than one week.

The larger the equipment capacity, the faster the speed, and the shorter the interval. Therefore, in the actual bearing fault diagnosis, once the late fault characteristics are found, the fault of one-way bearing should be determined and the maintenance should be arranged as soon as possible.

The manufacturing of Koyo bearings usually involves forging, Koyo One-Way Bearing heat treatment, turning, grinding and assembly. The rationality, advanced nature and stability of all the processing technologies will also affect the life of unidirectional bearings.

The thermal treatment and grinding processes that affect the quality of bearings are often more directly related to the failure of bearings. In recent years, the research on the degenerative layer of the bearing working surface shows that the grinding process is closely related to the bearing surface quality.

1. The Koyo bearing has been damaged and should be replaced immediately.

2. There is too little or too much bearing grease or impurities such Koyo One-Way Bearing as iron filings. The capacity of one-way bearing grease shall not exceed 70% of the total volume, and those with impurities shall be replaced.

3. The fit between shaft and bearing is too tight or loose. If it is too tight, it shall be grinded again, and if it is Koyo One-Way Bearing too loose, the rotating shaft shall be sleeved.

4. The fit between bearing and end cap is too tight or loose. When it is too tight, the bearing chamber shall be processed, and when it is too loose, the steel sleeve shall be embedded in the end cover.

5. The covers at both ends of the Koyo One-Way Bearing motor or bearing covers are poorly assembled. Install and level the end cover or bearing cover stop, and tighten the screws.

The Important Role Of Maintenance Leading To Overheating Of Koyo One-Way Bearing

6. The belt is too tight or the coupling is poorly assembled. Adjust the belt tension and correct the coupling.

7. The lubricating oil of one-way bearing is too little, there are Koyo One-Way Bearing impurities or the oil ring is stuck. The oil ring shall be repaired or replaced if oil is added or replaced.

After moving for a period of time, the vibration and noise maintain a certain level, and the spectrum is very single, with only one or two times the frequency. The frequency spectrum above three times of power frequency rarely appears, and the state of one-way bearing is very stable and enters the stable working period.

After continued operation and entering the later stage of use, the bearing vibration and noise began to increase, and sometimes abnormal sound appeared, but the change of vibration increase was slow. At this time, the kurtosis value of Koyo bearing began to suddenly reach a certain value.

We believe that the bearing shows initial failure at this time.

The primary obligation of Koyo bearing service life analysis is to find out the primary elements of Koyo One-Way Bearing bearing failure according to a large number of matching data,

analysis data and failure mode pattern, so as to put forward Koyo One-Way Bearing targeted improvement measures, delay the retirement period of one-way bearing and avoid sudden early failure of Koyo bearing.

Troubleshooting of abnormal sound of Koyo deep groove ball bearing maintenance of lubricating grease

Storage And Use Of Grease

In order to judge whether the disassembled Koyo bearing can be reused, it is necessary to check Koyo One-Way Bearing after the deep groove ball bearing is cleaned, and carefully check the state of raceway surface,

rolling surface and mating surface, the wear of cage, the increase of bearing clearance and whether there is damage and abnormality related to the decline of dimensional accuracy. For non separable small ball bearing, support the inner ring horizontally with one hand and rotate the outer ring to confirm whether it is smooth.

Koyo bearings and other split bearings can inspect the raceway surfaces of rolling elements and outer rings respectively.

Since large deep groove ball bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceways, cages and edge retaining surfaces. The higher the importance of bearings, the more careful the inspection is

(1) The lubricating grease (oil) of the water pump with Koyo bearing newly put into use must be replaced after 100 hours of operation, and then every 500 hours of operation.

(2) For the flow Koyo bearing lubricated with grease, the grease should be replaced after 1500 hours of operation. The amount of oil added should not be too much or too little, because too much or too little grease will cause the heating of deep groove ball bearing. The amount of oil added is generally 1 / 2 ~ 2 / 3 of the volume of bearing chamber.

(3) For bearings lubricated with lubricating oil, the oil volume shall be added to the specified position.

(4) The container containing lubricating oil or grease shall be clean and sealed at ordinary times. There shall be no dust, scrap iron and other sundries to avoid damaging the bearing.

(5) Sodium base grease is generally used for deep groove ball bearing of motor. This kind of grease is characterized by high temperature resistance (125 ℃), but it is easy to dissolve in water, so it can not be used for lubrication of Koyo bearing.