Failure reason of ina imported bearing
Failure reason of ina imported bearing
2022年5月30日
Troubleshooting method for temperature and vibration of four row cylindrical roller bearings
Troubleshooting method for temperature and vibration of four row cylindrical roller bearings
2022年6月1日

Judging the service life of fag needle roller bearing from its running sound

The cage of fag needle roller bearing ​

  • The rated load and limit speed of fag bearing are determined under the condition that the wig is lubricated properly, and proper lubrication means that the lubricant is selected appropriately and the dosage is appropriate. 3 lithium grease is used, and the grease of appropriate brand is not selected according to the working condition of self-aligning roller bearing.Judging the service life of fag needle roller bearing from its running sound
  •  For example, for low-speed motors, 3\n\li grease has a low viscosity and cannot form a good oil film, resulting in poor lubrication and wear failure of self-aligning roller bearings. As most fag bearings do not have grease filling devices without shutdown, it is impossible to replenish and replace grease in time, resulting in insufficient and deteriorated grease, resulting in lubrication damage and bearing wear failure.Judging the service life of fag needle roller bearing from its running sound
  • The cage of fag bearing was broken, and the fag bearing was stuck. During disassembly inspection, it was found that the lubricating grease at the shaft extension end was dry, hard and deteriorated. The cage was loose, and the self-aligning roller bearing was overheated. 
  • Because the motor was used outdoors and the ambient temperature was too low, the viscosity of the lubricating grease increased, the lubrication was poor, and the bearing was worn out.Judging the service life of fag needle roller bearing from its running sound
  • The temperature has seriously affected the viscosity of the grease, resulting in poor lubrication of fag bearings. In summer, the temperature is as high as 37 C, and the viscosity of grease is greatly reduced, And minus 30 in winter The low temperature of “C” causes the viscosity of lubricating grease to increase and even agglomerate, thus forming a bad oil film, which destroys the lubrication of self-aligning roller bearings and causes wear failure. Judging the service life of fag needle roller bearing from its running sound
  • There are many reasons for the premature failure of fag bearings, but the main reasons are improper use and maintenance, poor lubrication, pollution overload, impact and impact during assembly, transportation and disassembly. Pollution is often caused by man, because the disassembly tools are not cleaned, etc Element.
  • Pitting corrosion: it is a typical failure form of fag bearing. The main reason is that the ordinary impact and incorrect assembly of deep groove ball bearing during handling will cause indentation on the raceway. Judging the service life of fag needle roller bearing from its running sound
  • When an indentation is generated in the raceway, the rotating rolling element will produce an impact every time it passes through an indentation, which has a rolling effect on the indentation, and flake spalling will occur at the indentation, resulting in increased vibration and noise. Judging the service life of fag needle roller bearing from its running sound
  • In addition, when there is external load on the bearing and it does not rotate, the external vibration will cause indentation on the inner and outer race raceways of fag bearing, which will cause the raceways to peel off over time, and the peeled debris is more harmful to the bearing. In order to prevent the occurrence of these accidents, effective methods can be adopted in daily work to eliminate vibration sources or vibrations and maintain good lubrication. Judging the service life of fag needle roller bearing from its running sound
  • A slight initial load can also be applied to the deep groove ball bearing to make the rolling element and rolling contact well and improve the anti-seismic capacity. In addition, different axial degrees with the hole during installation will also cause bearing failure.Judging the service life of fag needle roller bearing from its running sound
  • In the actual work, due to poor lubrication or excessive overload work, excessive friction and high production heat will soften the bearing steel, cause the volume expansion of deep groove ball bearings and increase the mutual extrusion pressure. When it reaches a certain degree, the fag bearing will lock on the shaft. When the bearing is overheated, the gap between the rolling element and the cage support will become smaller, and the resulting stress is not enough on the cage. Judging the service life of fag needle roller bearing from its running sound
  • With the extension of time, the cage will also break, Thus, the speed of bearing failure is accelerated. Due to the influence of fitting clearance, the clearance between the shaft and the shaft hole is too large, resulting in relative movement between the two. First, the wear clearance of the fitting shaft section becomes larger and larger, which leads to the scrapping of the bearing; Judging the service life of fag needle roller bearing from its running sound
  • Second, the bearing is scratched, which affects the accuracy of movement. These reasons lead to the premature failure of deep groove ball bearings, which is detrimental to our actual work. Therefore, it is of great practical value to study how to avoid premature failure of bearings and prolong their service life. 
  • There are two main fault diagnosis methods for IKO bearings: one is to find the impact pulse at the initial stage of the fault through the resonance demodulation method. Judging the service life of fag needle roller bearing from its running sound
  • This method is widely used in almost all self-aligning ball bearing fault diagnosis instruments. Due to the different frequency band selection of resonance frequency, the sensitivity of various instruments is different. This method also has disadvantages. Judging the service life of fag needle roller bearing from its running sound
  • Because the severity of IKO bearing fault is not linear with the impact energy, when the fault is serious, the impact energy will sometimes be reduced and missed diagnosis will occur. Another method is to directly analyze the frequency spectrum of the fault signal of the bearing, and analyze the fault frequency of the inner ring, outer ring and roller. Judging the service life of fag needle roller bearing from its running sound
  • This method can be diagnosed only when the fault of self-aligning ball bearing is serious. Generally, the combination of the two methods can obtain better diagnostic results. For low-speed heavy-duty bearings, the above diagnostic methods are limited. From the analysis of fault characteristics, the low-speed bearing mainly has the following characteristics:Judging the service life of fag needle roller bearing from its running sound
  • Since the speed of the self-aligning ball bearing is very low, the calculated IKO bearing fault frequency is also very low, generally ranging from a few tenths of a Hertz to a few hertz. Such a frequency is not suitable for spectrum analysis.Judging the service life of fag needle roller bearing from its running sound
Judging the service life of fag needle roller bearing from its running sound

The frequency of fag needle roller bearing

  • Because the speed of the self-aligning ball bearing is very low, the interval between each fault impact is long. In addition, different fault forms can be divided into entering the bearing area and not in the bearing area. It is difficult to accurately detect the fault signal by using the impact method, and carry out a comprehensive analysis of the fault.Judging the service life of fag needle roller bearing from its running sound
  • The frequency of impact response is low. The low-speed and heavy-duty IKO bearing has low speed and structural characteristics, so its impact response frequency is generally lower than that of other equipment. The rotating shaft bearing of the rotating platform is a key component to realize the function of the platform. Its working characteristics are extremely slow rotation speed and limited rotation angle. The working angle range is 0 ~ 180 degrees. Judging the service life of fag needle roller bearing from its running sound
  • The opening and closing speed depends entirely on the operation of workers. The normal opening and closing time is about 3 minutes. Moreover, such important equipment has the characteristics of single piece design, production and its special operation.Judging the service life of fag needle roller bearing from its running sound
  •  There is neither reliable design data nor reliable statistical data. Therefore, the traditional fault diagnosis methods of self-aligning ball bearings, such as resonance demodulation method and acoustic emission method, are not suitable for this kind of bearings. Therefore, this kind of bearing has no characteristic frequency to refer to. Judging the service life of fag needle roller bearing from its running sound
  • In other words, its frequency domain information can not be directly used. The research on the performance test and fault diagnosis of this IKO bearing is a new field. There may be many factors that may affect the service life of fag bearings. The factors and internal friction sound have been further explained. The main factors used for adjustment are that the installation, use and maintenance, maintenance and repair meet the technical requirements. Judging the service life of fag needle roller bearing from its running sound
  • According to the technical requirements for installation, use, maintenance and repair of needle bearing, the contact load, speed and lubrication status of the operating bearing are monitored and checked, and the direct cause of abnormality is found and adjusted back to normal.Judging the service life of fag needle roller bearing from its running sound
  • Installation conditions, one of the factors used for needle roller bearings is the load-bearing capacity that often causes incorrect state changes between various parts of the installation package, the primary factor for abnormal working temperature of fag bearings, vibration, noise, gradual progress, and 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 factors of bearing failure.Judging the service life of fag needle roller bearing from its running sound
  • Whether the selection is appropriate or not is still the fag bearing fault analysis that must be considered. The manufacturing of needle roller bearings will be adjusted and restored to normal through forging, heat treatment, turning and lubrication conditions to monitor and check the direct causes of abnormal findings. The installation condition is one of the factors that use the bearing. 
  • It is the primary factor that often causes the state change between various parts of the incorrect installation package. The main factors of the inner life in abnormal operation and early termination refer to the structural design, high-quality manufacturing process and materials. There are three factors that determine the quality of the bearing.Judging the service life of fag needle roller bearing from its running sound
  • The bearings are better than that even if the shape will turn into a low buzzing sound, the injury will produce knocking noise, which will collide and diverge according to the speed of the needle bearing.
  • If there is intermittent noise, it is passed. If sharp’s hissing, squeaking and other sounds do not follow the rules, the poor performance of the needle roller bearing is often revealed, or even the situation is reversed.Judging the service life of fag needle roller bearing from its running sound
  • Sharp squeak noise is not appropriate because it is smooth and flat. Improper fag bearing clearance will create a metallic sound. It will cause the vibration of the bearing on the outer rail to indent and form a smooth and loud sound. Judging the service life of fag needle roller bearing from its running sound
  • If the components of the equipment are damaged due to the performance of the roll. If any contaminant tends to cause a hissing sound, it will damage the appearance of the attack when rolling. Serious damage will occur in order of rules, but not very noisy.Judging the service life of fag needle roller bearing from its running sound
  • The early rolling failure of needle roller bearings is a major factor affecting the metallurgical quality. With the metallurgical technology (such as fag bearing steel, vacuum degassing, etc.) and other multi-channel processing and assembly processes.Judging the service life of fag needle roller bearing from its running sound

Thefag needle roller bearing is allowed

  • When the mechanism is running, a certain temperature is allowed at the position where fag bearing is installed. When touching the mechanism shell with hands, it is normal to feel that it is not hot. Otherwise, it indicates that the temperature of tapered roller bearing is too high.Judging the service life of fag needle roller bearing from its running sound
  • The reasons for high bearing temperature include: the quality of lubricating oil does not meet the requirements or deteriorates, and the viscosity of lubricating oil is too high; The mechanism assembly is too tight (insufficient clearance); The assembly of tapered roller bearing is too tight; The bearing race rotates on the shaft or in the shell; Excessive load; Broken fag bearing cage or rolling element, etc.Judging the service life of fag needle roller bearing from its running sound
  • The rolling bearing is allowed to have slight running noise during operation. If the noise is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.Judging the service life of fag needle roller bearing from its running sound
  • The reasons for the noise of rolling bearings are complex. One is the wear of the mating surfaces of the inner and outer rings of bearings. Due to this kind of wear, the matching relationship between the bearing and the shell, the tapered roller bearing and the shaft is damaged, resulting in the axis deviation from the correct position and abnormal noise when the shaft moves at high speed. Judging the service life of fag needle roller bearing from its running sound
  • When the bearing is tired, the metal on its surface will peel off, which will also increase the radial clearance of fag bearing and produce abnormal noise. In addition, bearing lubrication is insufficient, dry friction is formed, and bearing breakage will produce abnormal sound. After the tapered roller bearing is worn and loosened, the cage is loose and damaged, which will also produce abnormal noise.Judging the service life of fag needle roller bearing from its running sound
  •  Lubrication is an indispensable process in the use of one-way bearings. However, there are many lubrication methods, and the problems that should be paid attention to in the lubrication process of various lubrication methods are also different, which leads to the confusion of users. Today, I will introduce to you the precautions for IKO bearing oil lubrication and grease.Judging the service life of fag needle roller bearing from its running sound
  • Grease lubrication
  • The relubrication of IKO bearings is carried out during the planned equipment shutdown and supplemented regularly. At the same time, the old grease is removed or squeezed out through the oil drain air. Wipe the grease nipple clean before adding fresh grease. If the one-way bearing housing does not have an oil nozzle, open the bearing housing cover or end cover to take out the old grease. After cleaning, add fresh grease of the same model.Judging the service life of fag needle roller bearing from its running sound
  • Lubricating oil lubrication
  • Regularly check the oil level and quality of the lubricating oil. Generally, the normal oil level should be within 1/3-2/3 of the equipment oil level window or mark. If the oil replenishment mode is oil cup, the displayed oil level only represents the oil replenishment capacity, while the oil level of IKO bearing housing meets the operation requirements. If the oil level in the oil cup is lower than 1/4 of its total volume, oil replenishment can be considered.Judging the service life of fag needle roller bearing from its running sound
  • Inspection and oil replenishment methods: take a small amount of lubricating oil as a sample and compare it with fresh lubricating oil. Competent units may consider conducting oil quality test to ensure that the oil quality is qualified. If the sample looks like a cloud, it may be the result of mixing with water, that is, it is often said that the oil is emulsified. At this time, the lubricating oil should be replaced.Judging the service life of fag needle roller bearing from its running sound
  • If the sample becomes darker or thicker, it may indicate that the lubricating oil has begun to carbonize, and the old lubricating oil should be completely replaced. If possible, flush the oil circuit with fresh lubricating oil. When replacing the lubricating oil, ensure that the new and old models of the replaced lubricating oil are the same, and supplement them to meet the required oil level.Judging the service life of fag needle roller bearing from its running sound
  • The grease used in the one-way bearing must have anti rust effect, and the anti rust agent can not be dissolved in water. The grease shall have good adhesion to form an oil film on the steel surface, which can be maintained even if the grease is filled with water. Judging the service life of fag needle roller bearing from its running sound
  • Grease will soften during machining, resulting in leakage. In case of vibration application, grease will be thrown into the bearing by IKO bearing pedestal. If the mechanical stability of the grease is not enough, the grease will be continuously thrown out of the bearing, which will cause mechanical disintegration of the soap structure and damage to the used grease.
Chat with us
Chat with us
Questions, doubts, issues? We're here to help you!
Connecting...
None of our operators are available at the moment. Please, try again later.
Our operators are busy. Please try again later
:
:
:
Have you got question? Write to us!
:
:
This chat session has ended
Was this conversation useful? Vote this chat session.
Good Bad