Application and working principle of haftless trommel screen

The shaftless trommel screen drum unit is mounted on the frame at an angle and is designed without a central shaft structure. The motor drives the pinion gear to rotate with the large gear of the drum or the chain and the gear on the drum. The motor drives the chain drive or the roller is placed on the two rollers, and the motor drives the roller to drive. The roller device rotates under the driving of the driving device. After the material enters the roller device, due to the tilting and rotation of the roller device, the material on the screen surface is turned over and rolled, so that the qualified material (the product under the sieve) passes through the bottom of the rear end of the roller. The material is discharged, and the unqualified material (the product on the screen) is discharged through the discharge port at the tail of the drum. Due to the turning and rolling of the material in the drum, the material stuck in the screen hole can be ejected to prevent the screen hole from being clogged.

shaftless trommel screen

Application of trommel screen

The shaftless drum screen is mainly used for grading treatment of strip-shaped and entangled materials and is widely used in electric power, mining, metallurgy, building materials, chemical and other production industries. It is often used for the classification of refractory materials, coal, fertilizer, sand field stones, as well as the screening of sticky materials such as coal, coke, white ash, gold deposits, etc., to make the product structure more even to meet the production needs.

 

Advantages

Compared with the drum screen with the central shaft, the shaftless drum screen has a simpler structure. At the end of the drum screen close to the vibration motor, several steel bars are evenly welded around the drum, and the other end of the steel bar is gathered to the drum. On the central axis, after the fixing, the vibration motor is connected through the gear. When the vibration motor is started, the drum is also rotated, and the same screening principle as the roller screen of the shaft is used. The shaftless drum screen is relatively more material-saving, and the space for screening the material is larger. It is also easier to repair when the drum fails, so the use of the shaftless screen is also very much. For example, it can be used for pre-treatment of domestic garbage. It can filter out the required garbage. The advantage of no shaft is that it can avoid the entanglement of materials and the screening efficiency is relatively high.

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