What is Screen Rotor? What’s Rotors Roles of Hydrapulper?

The rotor is the main operating component of a hydrapulper. It drives the pulp at high speed, generating hydraulic shear to break down waste paper into flakes and disperse it into pulp. It also breaks down fiber bundles into individual fibers. The rotor’s own blades directly impact the shredded paper and fiber bundles, directly kneading and tearing the fiber bundles against the chassis, thus dispersing the pulp. The shape, structure, and speed of the rotor determine the power consumption and the effect of crushing waste paper and dispersing pulp. During operation, the rotor is subjected to impact and friction, resulting in relatively severe wear. It is an important component that requires key inspection and maintenance. In addition, the chassis has a circular filter screen grinding disc structure, which works with the rotor to further grind the slurry before it is discharged. The slurry is transported to the next process through the filter screen. The chassis may become clogged or worn, so extra care should be taken during maintenance.

Maintenance and Overhaul of Hydrapulper Rotor

During overall maintenance of the hydrapulper, observe the rotor shaft seal, the operating sound of the equipment, and ensure the motor current is within a reasonable range. It is also recommended to lubricate the transmission parts daily and clean the rotor and surrounding environment.

When the effects of pulp dissolution and waste paper shredding vary significantly, the wear of the rotor blades should be checked. If the wear is severe, the rotor should be replaced in time. However, the chassis should generally be replaced at the same time to ensure equipment compatibility and in accordance with maintenance procedures. When replacing the chassis, as long as the chassis fits snugly against the cylinder and the mesh on the chassis is normal, it’s fine.

Pulp Line Rotor Repair

Surfacing welding is a quick way to repair large area worn parts. When repairing a rotor with surfacing welding, subsequent machining of the rotor and blades requires grinding. The rotor and blades must be of the same shape and size; otherwise, the slurry flow state will change, affecting the dispersing effect. (Electro spraying can also be used to repair blades and shafts.) After the new rotor is assembled, the required power will be slightly higher than that of the worn rotor. Additionally, if the shaft is bent, it can be corrected to avoid excessive vibration. If the shaft diameter is severely worn, electro-spraying can also be used for repair.

Establishing a systematic rotor maintenance strategy is crucial for ensuring the continuous and stable operation of the pulping production line and controlling long term operating costs. This strategy should comprehensively cover every aspect, from routine maintenance and wear repair to precision calibration, to ensure the rotor is in optimal performance condition.