Solution and principle of IKO high temperature bearing noise
2022年4月12日
Importance of test run inspection to installation quality of ina thrust ball bearing
2022年4月12日

Precautions for fixing the inner ring of IKO stainless steel bearing

  • When disassembling the IKO bearing for maintenance, first record the appearance of the bearing, confirm the residual amount of lubricant, and wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.

Precautions for fixing the inner ring of IKO stainless steel bearing

  • The cleaning of the removed bearing is divided into coarse cleaning and fine cleaning. Put the metal mesh pad bottom in the container respectively, so that the IKO bearing does not directly contact the dirt of the container. During rough cleaning, if the bearing rotates with dirt, it will damage the rolling surface of stainless steel bearing, which should be paid attention to. In the coarse cleaning oil, use a brush to remove the grease and adhesion. After it is roughly clean, turn to fine cleaning.
  • Fine cleaning is to carefully clean IKO bearing while rotating in cleaning oil. In addition, the cleaning oil should always be kept clean.
  • In order to judge whether the disassembled IKO bearing can be reused, it is necessary to check after the bearing is cleaned, and carefully check the state of raceway surface, rolling surface and mating surface, the wear of cage, the increase of clearance of stainless steel bearing and whether there are damages and abnormalities 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.
  • Shoulder fixation
  • The inner ring of IKO bearing is axially fixed by shaft shoulder and interference.
  • It is applicable to the supporting structure fixed at both ends.
  • Simple structure and small overall size.
  • Circlip fixing
  • The bearing inner ring is axially fixed by the shaft shoulder and the lock nut.
  • It can bear small bidirectional axial load.
  • Small axial structure size.
  • Lock nut fixing
  • The bearing inner ring is axially fixed by the shaft shoulder and the lock nut. It also has a lock washer to prevent looseness, which is reliable and suitable for high-speed and heavy-duty occasions.
  • Fixed end face of thrust washer
  • The bearing inner ring is axially fixed by the shaft shoulder and the shaft end retaining ring. The shaft end retaining ring is fixed on the shaft end with screws. Fixing screws shall be provided with locking devices.
  • It is suitable for occasions where the shaft end is not suitable for thread cutting or the space is limited.
  • Fixing with set sleeve
  • The radial dimension of the inner hole of the tightening sleeve is compressed and clamped on the shaft to realize the axial fixation of the bearing inner ring.
  • Dismounting sleeve fixing
  • The clamping mode of the release sleeve is the same as that of the set sleeve. However, due to the special nut, the disassembly sleeve is convenient for bearing loading and unloading. It is suitable for the fixation of double row spherical bearings with large radial load and small axial load on the optical axis.
  • Oil bath lubrication is a common lubrication method in IKO bearings, which is suitable for the lubrication of low and medium speed bearings. Part of the bearing is immersed in the groove, and the lubricating oil is brought up by the rotating bearing parts and then flows back to the oil groove. The oil level should be slightly lower than the center of the low rolling element.
  • Oil dripping lubrication is suitable for stainless steel bearing parts requiring quantitative supply of lubricating oil. The amount of oil dripping is generally one drop every 3-8 seconds. Excessive amount of oil will increase the bearing temperature.
  • The filtered oil is transmitted to IKO bearing parts by oil pump, and the lubricating oil after passing through the bearing is filtered and cooled before use. Because the circulating oil can take away a certain amount of heat and cool the bearing, this method is suitable for bearing parts with high speed.
Precautions for fixing the inner ring of IKO stainless steel bearing
  • The dry compressed air is mixed with the lubricating oil through the sprayer to form an oil mist. In the jet IKO bearing, the airflow can effectively cool the bearing and prevent impurities from invading. This method is suitable for the lubrication of high-speed and high-temperature bearing parts.
  • Use the oil pump to shoot the high-pressure oil into the bearing through the nozzle, and the oil injected into the stainless steel bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling element and cage also form an airflow in the surrounding air at a fairly high rotation speed.
  •  It is difficult to send the lubricating oil to the bearing by using the general lubrication method. At this time, the lubricating oil must be sprayed into the bearing by means of high-pressure injection. The position of the nozzle should be placed between the inner ring and the center of the cage!
  • In the processing flow of Timken bearing, how do the outer ring, inner ring, rolling element and cage of the bearing fit together. To put it simply, it is to put the inner and outer rings of the imported bearings first, then put the inner rings aside, then put the rollers on the side, then adjust the position of the rolling elements, then put the cage. Now we all know that the cage is also involved in the processing of the bearing, so what is the main function of the bearing cage?Precautions for fixing the inner ring of IKO stainless steel bearing
  • The clearance of Timken bearing will change accordingly under different conditions. Specifically, it can be divided into:Precautions for fixing the inner ring of IKO stainless steel bearing
  • Effective clearance or working clearance refers to the actual clearance in the imported bearing when the bearing is installed in the main engine and reaches a certain temperature rise under a certain load. Obviously, the effective clearance is smaller than the working clearance.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The clearance in the bearing is to ensure the flexible and non blocking operation of the bearing, but it is also required to ensure the smooth operation of the bearing, no significant settlement of the axis of the bearing, and the number of rolling elements bearing the load as much as possible.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The original clearance of Timken bearing refers to the clearance of the bearing in the free state before it is installed on the machine. In fact, it is difficult to know the original clearance without measurement. Therefore, the original clearance is often replaced by inspection clearance.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The lubrication interval has a simple premise: keep the equipment running reasonably under the condition that the imported bearing does not stop running due to drying and collapse. This is a fixed concept of prevention. However, we must maintain a balance between lubrication hunger and excessive lubrication.
  • Traditionally, lubrication planning is based on time. Equipment suppliers usually make lubrication plans according to the operation time. Moreover, equipment suppliers often add guidance on the amount of lubricating oil in their maintenance planning process.Precautions for fixing the inner ring of IKO stainless steel bearing
  • There are three major causes of rolling bearing noise: bearing dust, scars and improper lubricant (wrong lubricant selection, lack of lubricant and aging and hardening of lubricant). The following answers are for you one by one.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Dust causes bearing noise
  • If the bearing will have aperiodic vibration, and the size of its vibration and noise is uncertain, sometimes not, it indicates that there are dust and other foreign matters in the bearing.
  • Methods to solve the bearing noise caused by dust: first, the cleaning method of ina bearing can be improved, and the bearing, shaft, seat hole and matching parts can be strictly cleaned before the device; Second, eliminate foreign matters in the polishing agent; Third, improve the sealing of bearings; IV. prevent the use of plastic holders with impure data or embedded foreign matters.
  • The scar causes the bearing to make noise
  • If the bearing will have periodic vibration and noise like riveting rivets, its period can be fixed, but most of them have a certain corresponding relationship with the speed, indicating that the rolling surface of the rolling bearing has cracks, indentation or corrosion.
  • Methods to solve the bearing noise caused by scars: first, do not knock the bearing when installing the device. When assembling the bearing with the shaft and then installing it into the bearing seat, avoid the oblique installation of the bearing; (II) avoid bearing corrosion during storage and shock vibration during transportation; Third, use smooth grease with high viscosity.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Improper lubricant causes bearing noise
  • If the bearing will produce irregular noise, it indicates that the bearing is improperly lubricated.
  • Methods to solve the bearing noise caused by improper lubricant: improper lubricant can be divided into three categories: first, choose the wrong lubricant; (II) lack of lubricants; III. aging and hardening of lubricant. To select the appropriate lubricant, the lubricant should be added according to the lubrication amount, and the lubricant should be changed regularly.Precautions for fixing the inner ring of IKO stainless steel bearing
  • It’s not terrible that the bearing makes noise due to improper lubricant, that the bearing makes noise due to scars, and that the bearing makes noise due to dust, because we all have solutions.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Compressive strength refers to the ability to bear unidirectional load without being crushed or changing size.Precautions for fixing the inner ring of IKO stainless steel bearing
  • How to ensure the normal operation of deep groove ball bearing in the process of application, and how to make IKO bearing undamaged and make the bearing life longer. Here are the precautions for ensuring the reliable operation of bearings. Generally, the precautions for ensuring the reliable operation of deep groove ball bearings are as follows:Precautions for fixing the inner ring of IKO stainless steel bearing
  • The clearance of deep groove ball bearing should be appropriate. If it is too large, it will produce impact. If it is too small, it will have poor lubrication and may burn the tile.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Improve lubrication quality, control oil pressure, temperature and flow, and strengthen oil filtration.
  • The geometry and surface quality of bearing groove shall be strictly guaranteed.
  • Fuel oil and lubricating oil conforming to the regulations shall be used.
  • It is disadvantageous to control the temperature state of diesel engine and work under the condition of supercooling and overheating. In cold weather, the diesel engine shall be preheated before starting, and the crankshaft shall be rolled by hand to make the oil enter the friction surface.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The cleanliness of the bearing has a great impact on the service life of the bearing. IKO bearing company has conducted a special test for this purpose, and the result is that the difference is several times or even dozens of times. The higher the cleanliness of the bearing, the longer the service life. Precautions for fixing the inner ring of IKO stainless steel bearing
  • The tests of others show that the lubricating oil with different cleanliness has a great impact on the service life of the ball bearing. Therefore, improving the cleanliness of lubricating oil can prolong the service life of bearing. In addition, if the dirt particles in lubricating oil are controlled below 10um, the service life of IKO bearing will increase several times.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Influence on lubrication performance the decline of IKO bearing cleanliness not only affects the formation of lubricating oil film, but also causes the deterioration of lubricating grease and accelerates its aging, thus affecting the decline of lubricating performance of lubricating grease.Precautions for fixing the inner ring of IKO stainless steel bearing
  • NSK bearing is allowed to make 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.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The reasons for the noise of NSK bearing are complex. One is the wear of the mating surfaces of the inner and outer rings of the bearing. Due to this wear, the matching relationship between bearing and shell, rolling bearing and shaft is damaged, resulting in the axis deviation from the correct position and abnormal sound when the shaft moves at high speed. Precautions for fixing the inner ring of IKO stainless steel bearing
  • When the automobile bearing is tired, the metal on its surface will peel off, which will also increase the radial clearance of the bearing and produce abnormal noise. In addition, insufficient bearing lubrication, dry friction and bearing breakage will produce abnormal sound. After the bearing is worn and loose, the cage is loose and damaged, which will also produce abnormal noise.Precautions for fixing the inner ring of IKO stainless steel bearing
  • Bearing raceway sound and its control method raceway sound is a kind of slippery and continuous sound made by the moving bullet moving on the raceway surface when the automobile bearing is running. What types of bearing sealing?. It is a special sound without moving bearings in cities. General bearing sound is equal to raceway sound plus other sounds. Precautions for fixing the inner ring of IKO stainless steel bearing
  • The raceway sound of ball bearing is irregular, and its frequency is above 1000Hz. Its frequency does not change with the speed, but its partial sound pressure level increases with the acceleration of the speed. For bearings with loud raceway sound, the sound pressure level of raceway sound decreases with the addition of viscosity; The sound pressure level of automobile bearing with low raceway noise changes from reduction to no deletion when the viscosity increases to more than 20mm2 / s. Precautions for fixing the inner ring of IKO stainless steel bearing
  • The greater the rigidity of the bearing pedestal, the lower the partial sound pressure level of the raceway sound. If the radial gap is too small, the partial sound pressure level and slave frequency of raceway sound will increase sharply with the reduction of radial gap. Precautions for fixing the inner ring of IKO stainless steel bearing
  • There is no way to control the sound of raceway: choose low-noise bearings, that is, bearings with small waviness, and carefully choose the premise of utilization. Raceway noise often affects the noise of zero machinery. Reducing raceway noise can reduce the noise of zero machinery.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The impact sound of the moving projectile and its control method. When the larger ball bearing or NSK bearing is running at low speed under pure radial load, due to the small centrifugal force of the moving projectile, the moving projectile in the non load area will impact the connecting frame or raceway and make noise. Precautions for fixing the inner ring of IKO stainless steel bearing
  • But with the advance of the speed, that kind of sound will disappear. There is no way to control the impact sound of moving projectile: properly reduce the radial clearance, and use the bearing of connecting frame without reasonable layout and material.Precautions for fixing the inner ring of IKO stainless steel bearing
  • The rolling sound of automobile bearings and its control method rolling sound is the harsh metal friction sound that may occur anywhere in the bearing. Most of it occurs outside the larger bearing with grease lubrication, but it is more difficult to occur outside the lubricating grease with degraded base oil function, and it hardly occurs during oil lubrication. Precautions for fixing the inner ring of IKO stainless steel bearing
  • In addition, it is more difficult to occur in winter. When bearing pure radial load, it is less difficult to occur in places with large radial clearance. Moreover, with the difference of model size, it is less difficult to occur in a specific speed range, which will occur continuously and intermittently. The special processing method adopted for the outer race raceway can prevent the rolling sound. Precautions for fixing the inner ring of IKO stainless steel bearing
  • When necessary, we can choose that kind of bearing, or appropriately reduce the radial clearance of the bearing, and use the poor lubricating grease and forward to obtain the rigidity of the matching parts of the bearing.Precautions for fixing the inner ring of IKO stainless steel bearing