During the operation of the mechanism, the part where the embedded solid lubrication bearing is installed is allowed to have a certain temperature. When touching the mechanism shell with your hand, it should be normal not to feel hot. Otherwise, it indicates that the bearing temperature is too high.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
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 plane bearing assembly is too tight;
The bearing race rotates on the shaft or in the shell; Excessive load; Broken bearing cage or rolling element, etc.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
The inlaid solid lubricated bearing is allowed to have a slight running sound during operation. If the sound is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
The causes of rolling bearing noise 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 the bearing and the shell and between the 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.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
When the 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.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
Bearings with low noise requirements
Among the standard bearings produced in China, the ball bearing is from the inner diameter φ 2.5mm to φ There are several varieties of 60mm with three suffixes of ZL, Z2 and Z3, which correspond to three different low-noise requirements respectively. Among the roller bearings, there are eight models from n309 to n322, which are also manufactured according to the low-noise standard
These inlaid solid lubricated bearings can be fully applicable to other machines with low noise requirements, and the price is cheap. If the type and size can meet the requirements, try to use these two types of low noise bearings.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
Bearings with relatively low noise are used
When the above two types of low-noise bearings cannot be used, bearings with relatively low noise can be used.
The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
The noise of ball bearing is lower than that of roller bearing, and the (friction) noise of bearing with less sliding is lower than that of bearing with more sliding;The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
The noise of solid cage bearing is relatively lower than that of inlaid solid lubrication bearing with stamping cage; The noise of bearings with plastic cages is lower than that of bearings with the above two cages; Those with a large number of balls, thick outer ring and low noise,The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
The noise of high precision bearings, especially the inlaid solid lubricated bearings with higher rolling element accuracy, is relatively lower than that of low precision bearings,
The noise of small bearings is relatively lower than that of large bearings.
Under some special operating conditions, the life of universal joint bearing can be longer than that of traditional calculation, especially under light load. These special operating conditions are the surface damage that may be caused when the rolling surface (track and rolling parts) is effectively separated and limited by a lubricating oil film. In fact, under ideal conditions, the so-called permanent bearing life is possible.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
Poor lubrication
The lubricating oil (or grease) used in the universal joint bearing has a certain working temperature. When the temperature is too high, it will deteriorate, thus losing its lubricating effect and burning the bearing due to high temperature. In addition, the poor quality of lubricating oil (or grease) itself or untimely refueling (grease) during operation will also cause the bearing temperature to rise or produce abnormal sound.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
Rotor unbalance
Generally speaking, the problem of balancing the rotor will not occur before the assembly of the rotor. However, during the operation of some rotors, due to the corrosion of the medium or the wear of solid impurities, or the bending of the shaft, it will lead to unbalanced centrifugal force, resulting in bearing heating, vibration, serious wear of the raceway and even damage.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
Untimely inspection and replacement
During the operation of the universal joint bearing, it shall be checked regularly according to the regulations. In case of heating, abnormal sound, vibration and other conditions, it shall be stopped in time to find out the causes and eliminate the faults. If the bearing is found to be seriously fatigue peeling, oxidation corrosion, worn pits, cracks, and the hardness is reduced to HRC < 60, or there is too much noise to be adjusted, it shall be replaced in time.
If the inspection and replacement are not timely, it will cause serious damage to the bearing and even the rotor, thus affecting the normal production. In addition, vibration caused by improper bearing disassembly and loose equipment anchor bolts will also lead to indentation of bearing raceway and rolling element and cracking of inner and outer race of bearing.The key Method of Maintaining low Noise Inlaid Solid lubricated Bearing
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