In the process of using NTN bearing, the service life of NTN bearing is greatly reduced due to improper operation, insufficient lubrication, rust and corrosion, and some other factors such as current, external materials, eccentricity, etc. Therefore, in the process of using NTN bearing, it is necessary to have sufficient understanding and understanding of the preventive measures of NTN bearing.How to lubricate fag imported bearings
Insufficient bearing lubrication:How to lubricate fag imported bearings
Insufficient or improper NTN lubricating oil may cause component scratch or serious bearing deformation
Preventive measures: improve the lubrication system and supplement or replace the lubricant regularly and properly
Non standard bearing operation:How to lubricate fag imported bearings
Improper installation, operation or disassembly of the bearing may cause deformation or damage to the cage
Preventive measures: use proper operation, installation and disassembly tools, and use Beijing deruimei genuine NTN bearings.How to lubricate fag imported bearings
Bearing rust and corrosion:How to lubricate fag imported bearings
Contact with water may cause corrosion and rust of bearing elements. Rusted and damaged bearings may cause spalling during operation
Preventive measures: check the sealing regularly to ensure good sealing effect and store NTN bearings correctly
Bearing current:How to lubricate fag imported bearings
Energizing the bearing while it is rotating may cause grooves or nicks. When the bearing is stationary, improper grounding of electrical operation will cause slight burns
Precautions: before welding components other than NTN bearings, reduce or avoid current through the bearings through appropriate grounding connections
Bearing external material:How to lubricate fag imported bearings
Abrasive particle contamination and debris intrusion can cause wear, scratches and dents on the working surface of NTN bearings
Precautions: remove invading particles and debris, change lubricant and check sealing system
Bearing eccentricity:How to lubricate fag imported bearings
Eccentricity, inclination or excessive load may lead to geometric stress concentration or surface spalling
Precautions: use accurately machined NTN bearing pedestal and shoulder
The thermal sensor can monitor the working temperature of the bearing at any time, and automatically alarm or stop when the temperature exceeds the specified value to prevent the occurrence of combustion shaft accident. High temperature often indicates that the bearing is in an abnormal condition. High temperature is also harmful to the lubricant of the bearing. How to lubricate fag imported bearings
Sometimes bearing overheating can be attributed to the lubricant of the bearing. If the bearing temperature exceeds 125 ℃ for a long time, the bearing life will be reduced. The causes of high temperature bearings include insufficient or excessive lubrication and lubricant. The oil seal contains excessive clearance, insufficient friction, etc.How to lubricate fag imported bearings
Therefore, it is necessary to continuously monitor the bearing temperature. NTN bearing is used to measure the bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a fault has occurred. How to lubricate fag imported bearings
The periodic measurement of bearing temperature can be aided by thermometer, such as digital thermometer, which can accurately measure the bearing temperature and display it in ℃ or Fahrenheit.How to lubricate fag imported bearings
Generally, the temperature of the bearing can be inferred from the temperature outside the bearing chamber. If the oil hole can be used to directly measure the temperature of the outer ring of the bearing, NTN bearing is more suitable. Usually, the temperature of the bearing starts to rise slowly with the operation of the bearing, and reaches a stable state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. How to lubricate fag imported bearings
if the lubrication and installation parts are appropriate, the bearing temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken. NTN bearing is a precision part of imported bearings.How to lubricate fag imported bearings
The system realizes the optimization of workshop asset efficiency and maintenance work for the decision support of mechanical service, preventive maintenance means, condition monitoring and a series of maintenance work. Therefore, bearing plays a vital role in some industries. How to lubricate fag imported bearings
The shaft parts of machine tools, especially the spindle, are generally assembled with NSK Bearings or sliding bearings and rotate at a high speed, sometimes generating high heat. If this phenomenon is not eliminated in time, it will lead to overheating of the bearing and increase the temperature of the corresponding parts of the machine tool, resulting in thermal deformation.How to lubricate fag imported bearings
In serious cases, the height of the spindle and tailstock will be unequal, which will not only affect the accuracy and machining accuracy of the machine tool itself, but also burn out the bearing. The causes of main shaft bearing heating and its troubleshooting are shown in Table 1. In order to ensure the working condition of NTN bearing, it is necessary to avoid damage as much as possible. What should we do?How to lubricate fag imported bearings
Generally, if the bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidental and premature damage, which can not be resistant to use. This early damage, as opposed to fatigue life, is called the quality service limit of failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.How to lubricate fag imported bearings
As for the damage state of NTN bearing, for example, the clamping damage of the ring retaining edge of roller bearing can be considered as the reason. These reasons can also coincide with insufficient lubricant, unsuitable, defects of oil supply and drainage structure, intrusion of foreign matters, bearing installation error and excessive deflection of shaft.How to lubricate fag imported bearings
Therefore, only investigating the bearing damage, it is difficult to know the real cause of the damage. However, if you know the use machinery, service conditions, the structure around the bearing, the situation before and after the accident, and combined with the damage state of the bearing and several causes, you can prevent the recurrence of similar accidents. In order to ensure the working condition of NTN bearing, it is necessary to avoid damage as much as possible. What should we do?How to lubricate fag imported bearings
Generally, if the bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidental and premature damage, which can not be resistant to use. This early damage, as opposed to fatigue life, is called the quality service limit of failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.How to lubricate fag imported bearings
As for the damage state of NTN bearing, for example, the clamping damage of the ring retaining edge of roller bearing can be considered as the reason. These reasons can also coincide with insufficient lubricant, unsuitable, defects of oil supply and drainage structure, intrusion of foreign matters, bearing installation error and excessive deflection of shaft.How to lubricate fag imported bearings
Therefore, only investigating the bearing damage, it is difficult to know the real cause of the damage. However, if you know the use machinery, service conditions, the structure around the bearing, the situation before and after the accident, and combined with the damage state of the bearing and several causes, you can prevent the recurrence of similar accidents. The structural design, manufacturing process and material quality of ina imported bearings are analyzed.
INA imported bearings have reasonable design and advanced nature, so that long service life of INA bearing will be longer. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly. The rationality, advanced nature and stability of all the processing technologies will also affect the life of bearings. How to lubricate fag imported bearings
Among them, the heat treatment and grinding processes that affect the quality of finished bearings are often more directly related to the failure of bearings. In recent years, the research on the metamorphic layer on the working surface of bearing shows that the grinding process is closely related to the surface quality of bearing.How to lubricate fag imported bearings
How to lubricate fag imported bearings
The metallurgical quality of ina imported bearing materials was once the main factor affecting the early failure of rolling bearings. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.How to lubricate fag imported bearings
The main task of ina imported bearing failure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of the bearing and avoid sudden early failure of the bearing. For the use of bearings, noise is very common. Even the low-noise bearings in the imported Koyo bearings have the same situation. So why does it make noise? Today I will introduce its essence to you.How to lubricate fag imported bearings
The raceway sound of Koyo imported bearing and its control method raceway sound is a smooth and continuous sound generated by the rolling body rolling on the raceway surface when Koyo imported bearing is running. It is a unique basic sound that will occur in all rolling bearings. The general bearing sound is the sound of raceway plus other sounds. The raceway sound of ball bearing is irregular, and its frequency is above 1000Hz. Its main frequency does not change with the speed, but its total sound pressure level increases with the speed. How to lubricate fag imported bearings
For the bearing with loud raceway sound, the sound pressure level of raceway sound decreases with the increase of viscosity; For bearings with low raceway noise, the sound pressure level changes from decrease to increase when the viscosity increases to more than 20mm2 / s. The greater the rigidity of the bearing pedestal, the lower the total sound pressure level of the raceway sound.How to lubricate fag imported bearings
If the radial clearance is too small, the total sound pressure level and dominant frequency of raceway sound will increase sharply with the decrease of radial clearance. The methods to control the sound of raceway are: select low-noise bearings, that is, bearings with small waviness, and carefully select the service conditions. Raceway noise often affects the noise of the whole machinery. Reducing raceway noise can reduce the noise of the whole machinery.How to lubricate fag imported bearings
Impact sound of rolling element and its control method when the ball bearing or cylindrical roller bearing of larger model runs at low speed under pure radial load, due to the small centrifugal force of the rolling element, the rolling element in the non load area will impact the cage or raceway and make noise. But as the speed increases, the sound will disappear. The control methods of impact sound of rolling elements are: appropriately reduce the radial clearance, and use the bearing of cage with reasonable structure and flexible material.How to lubricate fag imported bearings
The rolling sound of imported Koyo bearings and its control method rolling sound is the harsh metal friction sound that can occur in cylindrical roller bearings on all occasions. Most of it occurs in larger types of grease lubricated bearings, which is more likely to occur in greases with degraded base oil performance and hardly occurs in oil lubrication. In addition, it is easy to occur in winter. How to lubricate fag imported bearings
When bearing pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a specific speed range with different models and sizes, both continuously and intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling sound. If necessary, this kind of bearing can be selected, or the radial clearance of the bearing can be appropriately reduced, the lubricating grease with excellent performance can be used and the rigidity of the parts matched with the bearing can be improved.How to lubricate fag imported bearings
First, the reasonable design and advanced nature of the structure will lead to longer TIMKEN bearing life. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly. How to lubricate fag imported bearings
The rationality, advanced nature and stability of all the processing technologies will also affect the life of TIMKEN imported bearings. Among them, the heat treatment and grinding processes that affect the quality of Timken imported bearings are often more directly related to the failure of bearings. In recent years, the research on the metamorphic layer of the bearing working surface shows that the grinding process is closely related to the surface quality of Timken imported bearings.How to lubricate fag imported bearings
The metallurgical quality of Timken imported bearing materials was once the main factor affecting the early failure of Timken imported rolling bearings. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in Timken imported bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of Timken imported bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.How to lubricate fag imported bearings
The main task of Timken imported bearing fHow to lubricate fag imported bearingsailure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of Timken imported bearings and avoid sudden early failure of Timken imported bearings.vHow to lubricate fag imported bearings
For sealed Timken imported bearings, appropriate grease has been filled during production; For the bearing, a sealing device is also set in the main engine to prevent the leakage of lubricating grease.How to lubricate fag imported bearings
There is a problem of how much grease should be injected into Timken imported bearings.How to lubricate fag imported bearings
Too little grease injection is easy to cause lack of grease or dry friction and affect service life. Excessive grease injection will lead to a large amount of grease leakage, which will not only pollute the environment, but also cause waste. It can be seen that the amount of grease injected into Timken imported bearing is the less the better on the premise of ensuring the full lubrication of Timken imported bearing.How to lubricate fag imported bearings
Advantages and disadvantages of grease lubrication under normal working conditions, grease lubrication can be used for most Timken imported bearing applications.
The advantage of grease is that it is easier to retain in Timken imported bearing configuration, especially in applications where the vertical axis or axis is inclined at a certain angle. The grease also has the function of sealing, which can prevent the influence of pollutants, moisture or moisture on Timken imported bearings. The application of grease will cause the temperature of the bearing to rise, especially if the speed is too high.How to lubricate fag imported bearings
In most cases, the Timken inlet bearing can be completely filled with grease only at the initial stage, while the Timken inlet bearing seat is only filled with an appropriate amount of grease and left with a certain free space. Before fully reaching the working speed, the excess grease must be discharged from the bearing during the running in stage, so that an appropriate amount of grease can be left in the Timken inlet bearing. How to lubricate fag imported bearings
When the operating temperature drops significantly, it indicates that the grease has run in with the bearing and is evenly distributed in the Timken imported bearing configuration. The so-called constant pressure preload is a method of giving appropriate preparatory load to the bearing by using coil spring and Belleville spring. In use, even if the relative position of the bearing changes, the preloading method. In use, even if there is a change in the relative position of the walking out, the preload can be roughly maintained at a certain level.How to lubricate fag imported bearings
Preload line diagram of SKF imported bearing after constant pressure preload. The rigidity of preload spring is usually very small compared with that of bearing. Therefore, the displacement straight line of spring is approximately parallel to the horizontal axis. Therefore, the rigidity of single bearing with constant pressure preload is the same as that of pre applied preload
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