Thrust roller bearings are used to withstand axial and radial combined loads, but the radial load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, this type of bearing has a lower friction coefficient, higher rotational speed, and has centering performance.
1. Selection and control of tolerance for thrust roller bearing chamber: The thrust roller bearing should rotate flexibly without any obstruction after being pressed into the thrust roller bearing. If there is obvious inflexibility in rotation, it indicates that the size of the shaft is too large and the tolerance needs to be lowered. If there is a noticeable "sanding" feeling when the thrust roller bearing is rotated by hand after being pressed into the shaft, it may be due to the large tolerance of the shaft or poor roundness of the shaft. So when controlling the tolerances of the shaft and thrust roller bearing housing, it is also necessary to control roundness. Many domestic manufacturers only control the tolerances and do not control roundness.
2. Assembly method of thrust roller bearings: As thrust roller bearings are high-precision products, improper assembly can easily cause damage to the groove of the thrust roller bearings, leading to damage to the thrust roller bearings. When assembling thrust roller bearings, there should be a dedicated mold that cannot be knocked randomly. When pressing the shaft, only the small ring can be subjected to force, and when pressing the large ring, only the large ring can be subjected to force. When assembling, it is required to use air pressure or hydraulic pressure. During pressing, the upper and lower molds should be in a horizontal state. If there is tilting, it will cause damage to the groove of the thrust roller bearing due to force, resulting in the guide sound of the thrust roller bearing.
3. Prevention of foreign objects during assembly: When the thrust roller bearing is installed on the rotor for dynamic balancing, it is easy to introduce the iron filings generated during dynamic balancing into the interior of the thrust roller bearing. Therefore, it is recommended to perform dynamic balancing before installing the thrust roller bearing. Some manufacturers, for the convenience of assembly, apply some oil or grease to the thrust roller bearing chamber for lubrication. However, it is often difficult for operators to control the amount well. If there is a large accumulation of oil or grease in the thrust roller bearing chamber, it is easy for the thrust roller bearing to enter the interior along the shaft during rotation. It is recommended not to apply oil or grease to the thrust roller bearing chamber. If it is not necessary to apply, it should be controlled to prevent accumulation in the thrust roller bearing chamber.
4. Prevention of paint rust: The characteristic of paint rust is that it often occurs in sealed motors. The motor makes a good sound during assembly, but after being stored in the warehouse for some time, the motor's abnormal noise becomes very loud. Removing the thrust roller bearing causes serious rusting. Many manufacturers used to think it was a problem with thrust roller bearings, but through our continuous promotion, motor manufacturers have realized that the main issue is insulation paint. The main reason for this problem is that the acidic substances evaporated from the insulation paint form corrosive substances at a certain temperature and humidity, which corrode the groove of the thrust roller bearing and cause damage to the thrust roller bearing. The problem can only be solved by selecting good insulation paint and assembling it after drying and ventilation for a period of time.
1. Selection and control of tolerance for thrust roller bearing chamber: The thrust roller bearing should rotate flexibly without any obstruction after being pressed into the thrust roller bearing. If there is obvious inflexibility in rotation, it indicates that the size of the shaft is too large and the tolerance needs to be lowered. If there is a noticeable "sanding" feeling when the thrust roller bearing is rotated by hand after being pressed into the shaft, it may be due to the large tolerance of the shaft or poor roundness of the shaft. So when controlling the tolerances of the shaft and thrust roller bearing housing, it is also necessary to control roundness. Many domestic manufacturers only control the tolerances and do not control roundness.
2. Assembly method of thrust roller bearings: As thrust roller bearings are high-precision products, improper assembly can easily cause damage to the groove of the thrust roller bearings, leading to damage to the thrust roller bearings. When assembling thrust roller bearings, there should be a dedicated mold that cannot be knocked randomly. When pressing the shaft, only the small ring can be subjected to force, and when pressing the large ring, only the large ring can be subjected to force. When assembling, it is required to use air pressure or hydraulic pressure. During pressing, the upper and lower molds should be in a horizontal state. If there is tilting, it will cause damage to the groove of the thrust roller bearing due to force, resulting in the guide sound of the thrust roller bearing.
3. Prevention of foreign objects during assembly: When the thrust roller bearing is installed on the rotor for dynamic balancing, it is easy to introduce the iron filings generated during dynamic balancing into the interior of the thrust roller bearing. Therefore, it is recommended to perform dynamic balancing before installing the thrust roller bearing. Some manufacturers, for the convenience of assembly, apply some oil or grease to the thrust roller bearing chamber for lubrication. However, it is often difficult for operators to control the amount well. If there is a large accumulation of oil or grease in the thrust roller bearing chamber, it is easy for the thrust roller bearing to enter the interior along the shaft during rotation. It is recommended not to apply oil or grease to the thrust roller bearing chamber. If it is not necessary to apply, it should be controlled to prevent accumulation in the thrust roller bearing chamber.
4. Prevention of paint rust: The characteristic of paint rust is that it often occurs in sealed motors. The motor makes a good sound during assembly, but after being stored in the warehouse for some time, the motor's abnormal noise becomes very loud. Removing the thrust roller bearing causes serious rusting. Many manufacturers used to think it was a problem with thrust roller bearings, but through our continuous promotion, motor manufacturers have realized that the main issue is insulation paint. The main reason for this problem is that the acidic substances evaporated from the insulation paint form corrosive substances at a certain temperature and humidity, which corrode the groove of the thrust roller bearing and cause damage to the thrust roller bearing. The problem can only be solved by selecting good insulation paint and assembling it after drying and ventilation for a period of time.
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