IKO roller bearing operation condition judgment quality problem
IKO roller bearing operation condition judgment quality problem
2022年6月10日
Analysis of noise detection technology of INA needle roller bearing raceway
Analysis of noise detection technology of INA needle roller bearing raceway
2022年6月12日

What are the causes of IKO thrust tapered roller bearing heating failure

Pressure lead detection method roller bearing heating failure

  • The fit clearance between the rolling bearing and the shaft must be appropriate. The following methods can be used to detect the radial clearance.
  • Common types of rolling bearings with race rule inspection method: rolling mill bearings, joint bearings, rotary table bearings, external spherical bearings with seats, thrust ball bearings, one-way bearings, fully loaded roller bearings, thrust roller bearings, and linear motion bearings.
  • For IKO bearings with large diameter, the clearance is large, so it can be directly detected with a narrow feeler gauge. For bearings with small diameter, the clearance is small, so it is inconvenient to measure with a feeler gauge, but the side clearance of the bearing must be measured with a feeler gauge with appropriate thickness.What are the causes of IKO thrust tapered roller bearing heating failure
  • Pressure lead detection method
  • The lead pressing method is more accurate than the feeler gauge in measuring the clearance of rolling bearings, but it is more complicated. The aluminum wire used for testing should be soft, and the diameter should not be too large or too small. The ideal diameter is 1.5~2 times of the gap. In practical work, soft lead wire is usually used for testing.What are the causes of IKO thrust tapered roller bearing heating failure
  • During the inspection, open the IKO bearing cover, select the lead wire with appropriate diameter, cut it into small sections of 15~40mm long, put it on the journal and the interface between the upper and lower bearings, cover the bearing cover, tighten the fixing bolts according to the specified torque, then loosen the bolts, remove the bearing cover, use a micrometer to detect the thickness of the flattened lead wire, and calculate the average value of the IKO bearing top clearance.What are the causes of IKO thrust tapered roller bearing heating failure
  •  If the top clearance is too small, a pad can be added on the joint surface of the upper and lower pads. If it is too large, the pad shall be reduced, scraped or the tile shall be poured again.What are the causes of IKO thrust tapered roller bearing heating failure
  • Adjustment of bearing bush tightening force: in order to prevent possible rotation and axial movement of the bearing bush during operation, in addition to fitting with the interference and stop parts, the bearing bush must also be compacted with IKO bearing cover. What are the causes of IKO thrust tapered roller bearing heating failure
  • The measurement method is the same as the top clearance measurement method. Besides measuring the thickness of the soft lead wire, the bearing bush tightening force can be calculated (expressed by the elastic deformation of the bearing bush after compression)
  • Generally, the pressing force of bearing bush is 0.02~0.04mm. If the pressing force does not meet the standard, it can be adjusted by increasing or decreasing the thickness of the gasket at the joint surface of the bearing and the bearing seat, and the pad back shall not be padded.What are the causes of IKO thrust tapered roller bearing heating failure
  • In addition to ensuring radial clearance, rolling bearings should also ensure axial clearance. When detecting the axial clearance, move the shaft to an extreme position, and then use a feeler gauge or dial indicator to measure the displacement of the shaft from one extreme position to the other extreme position, that is, the axial clearance. What are the causes of IKO thrust tapered roller bearing heating failure
  • Bearing is a fixed part of machinery and the main body of machinery. Its function is basically to maintain the central position of the shaft and control the movement of the part. IKO bearing plays an important role in any machine. Without bearing, the machine can not run.What are the causes of IKO thrust tapered roller bearing heating failure
  • Many users have reported that when using thrust tapered roller bearings, the bearing heating fault is common, and this fault will also affect the service life and performance of IKO bearings. So, how did this kind of fault come into being? Here are a few points of knowledge summarized for you.What are the causes of IKO thrust tapered roller bearing heating failure
  • The oil level is too low, and the lubricant is lost from the oil seal;What are the causes of IKO thrust tapered roller bearing heating failure
  • IKO bearing box is completely filled with grease or the oil level is too high. This will cause excessive mixing of lubrication, high temperature or oil leakage;What are the causes of IKO thrust tapered roller bearing heating failure
  • The contact (friction) oil seal is too dry or the spring is too tight;What are the causes of IKO thrust tapered roller bearing heating failure
  • The hole in IKO bearing housing is not round; The bearing housing is twisted and deformed; The bearing surface is not flat; The inner diameter of the box hole is too small;What are the causes of IKO thrust tapered roller bearing heating failure
  • The contact (friction) oil seal is too dry or the spring is too tight.What are the causes of IKO thrust tapered roller bearing heating failure
What are the causes of IKO thrust tapered roller bearing heating failure

When installing IKO bearing, roller bearing heating

  • IKO cylindrical roller bearing is generally fitted with the shaft as a transition fit, and the fit between the seat ring and the bearing seat hole is generally a clearance fit. The middle shaft ring of the two-way bearing shall be fixed on the shaft to prevent rolling relative to the shaft.What are the causes of IKO thrust tapered roller bearing heating failure
  • If the installation is reversed, not only the bearing will not work normally, but also the mating surfaces will be severely worn. When the shell hole is deep, the extended dial indicator can also be used for maintenance. Generally, the installation method of bearing is mainly shaft rotation. Therefore, the fit between inner ring and shaft is win-win fit, and the fit between outer ring and bearing chamber is clearance fit.What are the causes of IKO thrust tapered roller bearing heating failure
  • In order to ensure the performance of the rolling IKO cylindrical roller bearing and maintain its long-term use under good conditions, the bearing must be inspected and maintained. Such inspection and maintenance is very important to prevent faults in advance. It is hoped that regular inspection and maintenance can be carried out according to the operating standards suitable for the operating conditions of the machine.What are the causes of IKO thrust tapered roller bearing heating failure
  • Before using IKO cylindrical roller bearing, first check the surface of the bearing, so as to infer whether the bearing is loaded according to our requirements and standards. The inspection of the bearing surface should be carried out under the astigmatic lamp, and the crack and surface of the bearing should be inspected in detail.What are the causes of IKO thrust tapered roller bearing heating failure
  • Rolling sound of bearing: even if the bearing is slightly damaged by peeling, use a sound detector to reflect on the size and sound quality of the rolling sound of the running bearing. It will also announce abnormal sounds and irregular sounds, which can be distinguished with a sound detector.What are the causes of IKO thrust tapered roller bearing heating failure
  • The temperature of IKO cylindrical roller 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, it is more appropriate. In ordinary times, the temperature of the bearing rises gradually with the start of operation, and reaches the unchanged state after 1-2 hours. What are the causes of IKO thrust tapered roller bearing heating failure
  • The normal temperature of the bearing varies with the thermal capacity, heat dissipation, rotating speed and load of the machine. If it is smooth and the installation part is appropriate, the bearing temperature will rise sharply, which will lead to abnormal high temperature. What are the causes of IKO thrust tapered roller bearing heating failure
  • At this time, the operation must be stopped, and the bearing will accept the necessary precautions. Because the temperature is affected by smoothness, speed, load and conditions, the values in the table only reveal the approximate temperature limitations. The thermal sensor can be used to monitor the task temperature of the bearing at any time, and automatically alarm the user or stop when the temperature exceeds the regular value to avoid disordered combustion shaft
  • In addition, a clearance of 0.2-0.5mm shall be reserved between the bearing race and the bearing seat hole to compensate for errors caused by inaccurate part processing and installation. When the center of the bearing race is offset during operation, this clearance can ensure its automatic adjustment, avoid contact friction, and make it operate normally. What are the causes of IKO thrust tapered roller bearing heating failure
  • When the bearing is installed accurately, its seat ring can automatically adapt to the movement of the moving bullet body to ensure that the moving bullet body is located in the upper and lower ring raceways. When installing IKO cylindrical roller bearings, the verticality of the shaft ring and the shaft center line shall be checked. Otherwise, the bearing will be severely damaged. What are the causes of IKO thrust tapered roller bearing heating failure
  • The method is to fix the dial indicator on the end face of the housing, make the contact of the dial indicator push against the rolling bearing on the raceway of the bearing shaft ring, and observe the pointer of the dial indicator. What are the causes of IKO thrust tapered roller bearing heating failure
  • If the pointer is biased, it means that the shaft ring and the central line of the shaft are not vertical. IKO angular contact ball bearing has three factors in the relationship with life, that is, the quality of the bearing itself.  Use environment.  Installation method.What are the causes of IKO thrust tapered roller bearing heating failure
  • These changes will have the performance caused by small bearing damage, depending on the specific service requirements of the bearing. The track may be depressed by an irregular distribution, or it may be uniformly distributed by the corresponding roll position. If more than one load is kept rotating, then the depression will be evenly distributed throughout the raceway.What are the causes of IKO thrust tapered roller bearing heating failure
  • To this end, we need strict testing in manufacturing process, raw materials, and a good pass effect. Forging and heat treatment further quality control, process control equipment, can correctly analyze the existence of these defects, we must strengthen the control of the future. However, in general, usually fracture bearing overload fault occurs.What are the causes of IKO thrust tapered roller bearing heating failure
  • Radial internal clearance the radial clearance of IKO angular contact ball bearings is, under normal circumstances, allowed in a tight fitting bearing assembly with sufficient internal clearance.What are the causes of IKO thrust tapered roller bearing heating failure
  • Some IKO angular contact ball bearings are damaged on practical applications. The reason for bearing interpretation is that most bearing applications exceed the life of a machine or equipment itself. There are many reasons for bearing damage – exceeding the originally estimated load, or too small bearing clearance without sealing, etc. What are the causes of IKO thrust tapered roller bearing heating failure
  • Any factor has its special damage form and leaves special damage signs. Therefore, to look at the damaged bearings, we can find out the possible factors in most cases, and based on these findings, take measures to prevent recurrence. What are the causes of IKO thrust tapered roller bearing heating failure
  • Check the rolling sound and sound quality of IKO bearing in operation. Even if the bearing has slight peeling and other damage, it will produce abnormal sound and irregular sound. Therefore, the sound detector can be used to distinguish and prevent in advance.What are the causes of IKO thrust tapered roller bearing heating failure
  • IKO bearing vibration is very sensitive to bearing damage. For example, peeling, indentation, corrosion, crack, wear, etc. will be reflected in the vibration measurement of the bearing. Therefore, the vibration can be measured by using a special IKO bearing vibration meter (frequency analyzer, etc.), and the specific abnormal conditions can not be inferred from the frequency division.What are the causes of IKO thrust tapered roller bearing heating failure
  •  The measured values are different due to the service conditions of the sliding bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.What are the causes of IKO thrust tapered roller bearing heating failure
  • The temperature of IKO bearing can generally be inferred from the temperature outside the bearing chamber. It is more appropriate if the outer ring temperature of the bearing can be directly measured by using the oil hole.What are the causes of IKO thrust tapered roller bearing heating failure
  • Generally, the temperature of IKO bearing rises slowly with the operation and reaches a stable state after 1-2 hours. The normal temperature of IKO bearing varies with the thermal capacity, heat dissipation, rotating speed and load of the machine.What are the causes of IKO thrust tapered roller bearing heating failure
  •  If the lubrication and installation parts are appropriate, the sliding 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. 
  • According to a large number of test data, the average value of the outer ring temperature of the bearing in the machine during operation is for reference. Since the temperature is affected by lubrication, speed, load and environment, the value in the table only represents the approximate temperature range. 
  • The thermal sensor can be used to 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 accidents.
  • As for the damage status of the bearing, such as the clamping damage of the sleeve and the retaining edge of the sliding bearing, it can be considered that the reasons are insufficient lubricant, unsuitable, defects of the oil supply and drainage structure, invasion of foreign matters, installation error of the bearing, and excessive deflection of the shaft.
  • Adjustment of bearing pedestal stiffness and different axial stiffness of the hole the bearing pedestal must have sufficient stiffness, and the sliding bearing hole on the same axis must keep strictly different shafts. In addition, the relative degree of diameter may be adopted to avoid the overload caused by wedging when the rolling element moves. Locate by the positioning device.What are the causes of IKO thrust tapered roller bearing heating failure
  •  When installing IKO bearing, check whether the snap ring is in good condition, whether the shaft shoulder is flat and smooth, and whether the surface is free of impurities and dirt. During the tightening process of the fastening bolts of the bearing cover, keep rotating the angular contact ball bearing to make it self-aligning during the rotation, and tighten the fastening bolts according to the specified torque. What are the causes of IKO thrust tapered roller bearing heating failure
  • In the process of tightening the bearing cap, rotate the shaft continuously, and the bearing should align itself. If the bearing rotates lightly and flexibly without clamping stagnation, it means that it has been aligned, and the bearing cover bolts can be tightened evenly 2~3 times according to the specified torque. The intermediate support bearing of the transmission shaft shall also be adjusted in this way.What are the causes of IKO thrust tapered roller bearing heating failure
  • Therefore, it is difficult to know the real cause of the damage only by investigating the IKO bearing damage. However, if we know the operating machinery, operating conditions, the structure around the sliding bearing, understand the situation before and after the accident, and investigate the bearing damage status and several causes, we can prevent similar accidents from happening again.
  • Check the rolling sound and sound quality of IKO bearing in operation. Even if the bearing has slight peeling and other damage, it will produce abnormal sound and irregular sound. Therefore, the sound detector can be used to distinguish and prevent in advance.
  • IKO bearing vibration is very sensitive to bearing damage. For example, peeling, indentation, corrosion, crack, wear, etc. will be reflected in the vibration measurement of the bearing. Therefore, the vibration can be measured by using a special IKO bearing vibration meter (frequency analyzer, etc.), and the specific abnormal conditions can not be inferred from the frequency division. What are the causes of IKO thrust tapered roller bearing heating failure
  • The measured values are different due to the service conditions of the sliding bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.What are the causes of IKO thrust tapered roller bearing heating failure
  • The temperature of IKO bearing can generally be inferred from the temperature outside the bearing chamber. It is more appropriate if the outer ring temperature of the bearing can be directly measured by using the oil hole.What are the causes of IKO thrust tapered roller bearing heating failure
  • Generally, the temperature of IKO bearing rises slowly with the operation and reaches a stable state after 1-2 hours. The normal temperature of IKO bearing varies with the thermal capacity, heat dissipation, rotating speed and load of the machine. If the lubrication and installation parts are appropriate, the sliding bearing temperature will rise sharply, and abnormal high temperature will occur. What are the causes of IKO thrust tapered roller bearing heating failure
  • At this time, the operation must be stopped and necessary preventive measures must be taken. According to a large number of test data, the average value of the outer ring temperature of the bearing in the machine during operation is for reference. Since the temperature is affected by lubrication, speed, load and environment, the value in the table only represents the approximate temperature range. What are the causes of IKO thrust tapered roller bearing heating failure
  • The thermal sensor can be used to 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 accidents.What are the causes of IKO thrust tapered roller bearing heating failure
  • As for the damage status of the bearing, such as the clamping damage of the sleeve and the retaining edge of the sliding bearing, it can be considered that the reasons are insufficient lubricant, unsuitable, defects of the oil supply and drainage structure, invasion of foreign matters, installation error of the bearing, and excessive deflection of the shaft.What are the causes of IKO thrust tapered roller bearing heating failure
  • Adjustment of bearing pedestal stiffness and different axial stiffness of the hole the bearing pedestal must have sufficient stiffness, and the sliding bearing hole on the same axis must keep strictly different shafts. In addition, the relative degree of diameter may be adopted to avoid the overload caused by wedging when the rolling element moves. Locate by the positioning device. What are the causes of IKO thrust tapered roller bearing heating failure
  • When installing IKO bearing, check whether the snap ring is in good condition, whether the shaft shoulder is flat and smooth, and whether the surface is free of impurities and dirt. During the tightening process of the fastening bolts of the bearing cover, keep rotating the angular contact ball bearing to make it self-aligning during the rotation, and tighten the fastening bolts according to the specified torque.What are the causes of IKO thrust tapered roller bearing heating failure
  •  In the process of tightening the bearing cap, rotate the shaft continuously, and the bearing should align itself. If the bearing rotates lightly and flexibly without clamping stagnation, it means that it has been aligned, and the bearing cover bolts can be tightened evenly 2~3 times according to the specified torque. The intermediate support bearing of the transmission shaft shall also be adjusted in this way.
  • Therefore, it is difficult to know the real cause of the damage only by investigating the IKO bearing damage. However, if we know the operating machinery, operating conditions, the structure around the sliding bearing, understand the situation before and after the accident, and investigate the bearing damage status and several causes, we can prevent similar accidents from happening again.
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