When the needle bearing rotates, the rolling element A continuous and sleek sound made by rolling on the raceway; abnormal rolling friction sound can make uncomfortable metal friction sounds such as 'creaking, creaking', etc. When the surface of the bearing raceway or the surface of the rolling element is bumped, pressed, or rusted, a certain period of noise and vibration will be generated.Generally speaking, the needle roller bearing will heat up after it starts to run, and after a period of time, it will be at a lower temperature (usually 10-40 degrees higher than room temperature). The main cause of abnormal temperature rise is too much or too little lubricant.
Or the sensor installation location is different, so it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard. When Mechanical ball bearings manufacturers the needle roller bearing temperature has not reached the normal state and abnormal temperature rise occurs, the following reasons can be considered. One type of rolling bearing noise is generated by the bearing itself, that is, the inherent noise of the bearing; the other is the noise generated after the bearing is installed, and has nothing to do with the noise of the bearing itself. The internal clearance of TIMKEN imported bearings is too small or the load is too large.
Cage noise mainly occurs in ball bearings and tapered roller bearings. Temperature is very important to maintain the proper life of TIMKEN imported bearings and prevent the deterioration of lubricating oil. This sound is periodic. The impact will make a sound. At this time, it takes approximately 20 minutes to several hours. The vibration of needle roller bearings has obvious influence on the failure of the bearing. Creep of the mating surface. a) Inherent noise: rolling Road sound 'Various bearings and rolling friction sound (cylindrical roller bearing) is the inherent sound of rolling bearings. Therefore, it is not a problem under normal circumstances, and you need to pay attention only after the noise increases.
The sound is not fixed and sometimes not. c) Noise caused by improper use: it exists for all kinds of bearings.' The raceway sound is produced by the elastic characteristics of the rolling element and the raceway. will all vibrate in the bearing It is reflected in the test, so by using a special bearing vibration measuring device (frequency analyzer, vibrator, etc. This kind of The noise is non-periodic and also accompanied by vibration. Excessive friction in the sealing device.), the magnitude of the vibration can be measured. The measured value depends on the use conditions of the needle roller bearing. The bearing is not properly installed. It is recommended: Try to control it in a non-high temperature state (generally below 100 degrees).
When the needle roller bearing has dust intrusion during operation, it will generate dirt noise. The time to normal depends on the bearing size, form, rotation speed, lubrication method, and changes in the heat release conditions around the TIMKEN imported bearing. Lubricant does not match. In addition, the machine should be shut down as soon as possible and necessary countermeasures should be taken. This sound will not be emitted when the lubrication is good. When the needle roller bearing rotates, it occurs due to the vibration of the cage and the cage and rolling elements. Some problems can be analyzed by listening to the sound.. For example: peeling, indentation, rust, cracks, abrasion, etc. b) Noise related to bearing manufacturing: This includes cage noise and vibrato. The specific situation of abnormal vibration can be inferred through the frequency distribution. Tremolo (various bearings) is a sound with a certain frequency, which is produced by vibration caused by large waviness on the raceway surface
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