Bearing is a main component of Roots blower. If the bearing temperature of the blower is too high, the blower will be damaged. Today, I will introduce several simple and fast cooling methods for Roots blower bearings.
In winter, the room temperature is low, and the Roots blower operates well (when the room temperature is 5 ℃, the front bearing of Roots blower is about 80 ℃). In summer, when the room temperature reaches above 30 ℃, the front bearing of Roots blower exceeds the set tripping temperature as the room temperature rises. In order to avoid tripping, the crew added spray water on the casing to cool down as an emergency treatment measure, but the sanitary condition was poor during operation, which did not fundamentally solve the problem.
In order to fundamentally solve the problem of high current and high bearing temperature of Roots blower, we carried out a disassembly inspection. Before the disassembly inspection, we found the causes from the blower itself, and speculated that there might be four possibilities: (1) The internal clearance of the blower changed, and the impeller may have slight friction with the wallboard, leading to high output and high current of the blower, The heat generated by friction is transferred to the bearing, resulting in bearing heating; (2) The bearing itself has problems; (3) The large clearance fit between the bearing and the shaft as well as the bearing chamber causes serious heating; (4) The quality of lubricating oil in the bearing chamber is poor, and the oil film cannot be formed during the high-speed operation of the bearing. The bearing roller has slight dry friction, which causes serious heating.
1. The simple and practical way is to install sunshade outside the fan, which is one of the direct methods of cooling.
2. If the temperature of axial flow fan, wear-resistant fan and other fans rises too high, it is likely that the air inlet and outlet pipe gates are not closed when the fan is running. Solution: just close the gate of the gas inlet and outlet pipes.
3. In addition, due to the violent vibration of the box, the installation of shaft and rolling bearing is skewed, the front and rear bearings are not concentric, and the fan rolling bearing is damaged or the shaft is bent, which is one of the factors affecting the temperature of the fan bearing. The solution: timely change the lubricating oil to reduce the friction coefficient.
4. The motor belt is too loose. In this case, the motor belt should be replaced in time, and the position of the belt pulley should be adjusted to make it evenly stressed.
I believe that after reading the above content, you should also have some understanding of the solution to the high temperature of Roots blower bearing, and I hope it will be helpful to you.
Text label: Roots blower
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