Difference between trommel screen and vibrating screen
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Trommel screen and vibrating screen are two kinds of common screening equipment that are widely used. When faced with a choice, many customers often do not know how to choose. In this article, we will analyze the difference between the trommel screen and the vibrating screen from the aspects of the shape, structure, working principle and operation mode of the two.
1. The working principle is different
Trommel screen
The roller device is installed obliquely on the frame, and the motor is connected with the roller device through a reducer through a coupling, and the roller device is driven to rotate around its axis. When the material enters the drum device, due to the inclination and rotation of the drum device, the material on the screen surface is turned over and rolled, and the qualified material (under the screen) is discharged through the discharge port at the bottom of the rear end of the drum, and the unqualified material (on the screen) is discharged. product) is discharged through the discharge port at the end of the drum.
vibrating screen
The vibrating screen is divided into linear vibrating screen and circular vibrating screen according to the different movement modes.
The linear vibrating screen uses the vibration of the vibrating motor as the vibration source, so that the material is thrown up on the screen and moves forward in a straight line. The oversize and undersize of various specifications are discharged from their respective outlets.
The screen surface of the circular vibrating screen is fixed on the screen box, the screen box is suspended or supported by the spring, and the bearing of the main shaft is installed on the screen box, which is driven by the pulley and rotates at high speed. The eccentric weight plate is installed on the main shaft, and the centrifugal inertia force is generated with the rotation of the main shaft, so that the screen box vibrates with an approximate circular trajectory.
Second, the different screening methods
During the screening process, the trommel screen mainly uses the motor and the deceleration to drive the drum to rotate through the bearing, so that the material passes through the screen from high to low due to the rotation of the drum in the drum, and it is successfully screened, which belongs to rolling screening.
The vibrating screen uses the exciting force generated by the vibrating motor for screening, which belongs to vibrating screening.
3. Different shape and structure
The trommel screen is very different from the vibration in appearance and can be easily distinguished.
The trommel screen is a cylinder, and the outer surface of the cylinder is made of one or more layers, or several sections of screen mesh to increase the screening specifications. , sealing cover, material inlet and outlet, steel ring must be added at the drum device to prevent the deformation of the drum screen.
The vibrating screen is mainly composed of a screen box, a screen frame, a screen mesh, a vibration motor, a motor pedestal, a damping spring, and a bracket.
Fourth, the screening accuracy is different
The vibrating screen is a screening equipment with a vibrating motor as the vibration source, so the screening accuracy is high.
Five, different classification
The trommel screen can be divided into single-layer, double-layer and three-layer trommel screen according to the number of screen layers. At the same time, according to whether the trommel screen motor is connected with the bearing, it can also be divided into a shaft trommel screen and a shaftless trommel screen.
Similar to the vibrating screen, it can be divided into single-layer, double-layer, three-layer and four-layer vibrating screen according to the number of screen layers. Or according to the different movement trajectories of the screen surface of the vibrating screen, it is divided into a circular vibrating screen and a linear vibrating screen.
6. Different output and applicable occasions
The trommel screen has large output and long service life, and is suitable for large output requirements.
The linear vibrating screen in the vibrating screen has a small output and is suitable for screening fine-sized materials; the circular vibrating screen has a large output and is suitable for the large-scale production requirements of medium and large production lines.
Seven, the blocking situation is different
For the trommel screen, the material is turned and rolled in the trommel, so that the material stuck in the screen hole can be ejected to prevent the screen hole from being blocked.
For the circular vibrating screen, the material moves in a parabolic circular trajectory on the screen surface, so that the material is dispersed as much as possible, thereby improving the material bounce force, and the material stuck in the screen hole can also jump out, reducing the phenomenon of hole blocking.
Is the above the main difference between trommel screen and vibrating screen? When purchasing screening equipment, users should choose suitable screening equipment according to different site requirements and different material requirements to achieve better screening effect.