Roots blower The bearings used are stronger than those in other industries in strength, wear resistance and temperature resistance. Only in this way can they work for a long time in a complex and difficult to maintain environment. Roots blower is mainly used in various working environments with complex conditions and high operating loads, so the bearings of roots blower must be suitable for various high-temperature, humid, corrosive and wear environments. During the use of roots blower, the impurities in bearing materials and uneven lubrication caused premature damage to the bearing, which led to the paralysis of roots blower during operation. Therefore, it is very important to select high-quality bearings for Roots blower. Due to the continuous operation of Roots blower for a long time, the temperature rise of the motor body is too high, and the bearing is not filled with grease in time, resulting in bearing oil shortage until the bearing is damaged, shaft bending, belt fracture and other phenomena.
The bearing of Roots blower must withstand high load, strong impact, water and rust invasion during use. The NSK bearing adopted by our company is a new sealed, clean and lubricated roller bearing with ultra-high load capacity. It is said that the bearing can increase the load capacity by 34%, with higher reliability, and can work for a long time under severe lubrication conditions. It improves the bearing performance after sealing, integrates the optimized mechanical principle design, new materials and patented technology of sealing elements, and is easy to operate and install.
1、 The bearings of Roots blower were improperly assembled. For example, uneven tapping on the inner ring of the bearing during cold assembly caused the shaft to be worn, resulting in the loss of interference between the inner ring of the bearing and the outer ring or the reduction of the interference, resulting in the inner ring running. Uneven tapping on the motor end cover resulted in loose matching between the end cover bearing chamber and the outer ring of the shaft, resulting in the outer ring running. Running either the inner ring or the outer ring will cause the temperature rise of the bearing to rise sharply. As long as the bearing is in good condition, intermittent running of the outer ring is allowed. 2、 Due to axial misalignment of stator and rotor iron cores or insufficient precision after re machining of the rotating shaft, the inner and outer rings of the bearing are not on the same section, which causes the temperature of the bearing to rise after "eating hard" operation until it is burned.
3、 The bearing is damaged due to the mixing of different types of grease.
4、 When the bearing is replaced and processed again, the interference of the motor end cover after nesting is too large or the ovality exceeds the standard, which causes the bearing ball clearance to be too small or uneven, which causes the friction force to increase when the bearing runs, and the temperature rises sharply until it is burned out.
5、 The bearing itself has quality problems, such as rust spots on the raceway, inflexible rotation, too small clearance, cage deformation, etc.
6、 Roots blower has been out of operation for a long time, the grease has deteriorated, and the bearing has rusted. The only way to maintain it is to pay attention to regular inspection and regular replacement of the same brand of grease during use.
7、 The bearing wall is not cleaned, or the grease is not clean. For example, in order to keep the small steel materials of the bearing thoroughly cleaned, the bearing will burn out due to excessive temperature rise due to damage caused by rolling of the bearing during operation.
