The three-leaf roots blower is widely used in petrochemical industry, electric power metallurgy, mining building materials, fertilizer and paper making, sewage treatment and textile processing and other industries.

The problems of vibration, heating and abnormal sound often occur in the operation of the three-leaf Roots blower. This paper discusses the causes and treatment methods of these problems.

1.to solve the three-leaf roots blower gear center distance deviation and gear box shaft hole center distance deviation method.

Although the existence of this error has been verified by measurement and theoretical calculation, because the matching deviation between the center distance of the three-leaf Roots blower gear, the parallel error of the gear axis, the center distance deviation of the gear box shaft hole and the parallel error of the gear box shaft hole axis have been determined in the equipment manufacturing, the error cannot be adjusted in the maintenance. To solve these errors, only replace the fan gear and blade shaft in pairs, reduce or eliminate the gear tooth side clearance, and eliminate such faults.

2. bearing axial clearance adjustment is not in place, bearing seat wear caused by fan vibration solution.

First of all, it is necessary to check the wear of the bearing rolling body and ballistic, and then measure the rolling bearing clearance to see if there is poor axial positioning of the bearing. Usually, the axial clearance is adjusted by adding or reducing the cushion pressure on the bearing end cover. If the bearing is within the standard value range, take off the bearing to check whether the bearing is running out of the outer ring, if the bearing chamber is found to have wear marks, you can use epoxy resin, with a certain amount of phthalic acid, ethylenediamine for bonding and fixing, can eliminate such faults.

3.by adjusting the location of the driven tooth positioning pin to achieve the adjustment of the gap between the impeller, the wall panel and the housing.

The driven gear is composed of a gear ring and a gear hub, and the positioning pin on the driven tooth is designed to adjust the clearance. When repairing the three-blade Roots blower, do not fix the positioning pin between the gear ring of the driven gear and the gear hub before installing the gear pair, and first load the driven gear into the fan.

At this time, the drive gear and the driven gear are manually turned through the coupling to adjust the clearance of the gear pair and the clearance of the impeller between them. After the clearance is adjusted, the gear ring of the driven gear and the lock bolt of the gear hub are tightened, the whole is removed from the equipment, and the location of the positioning hole is re-selected for drilling. At this time, the positioning hole is the current accurate positioning size of the fan.