Analysis on the screening movement track of various vibrating screens
Vibrating screening equipment generally uses a vibrating motor as an excitation source, so that the screen can achieve effective power. The different installation and combination forms of the vibrating motor on the vibrating body can produce different sportswear trajectories for the material by the vibrating screen, thereby achieving effective The purpose of screening and grading is to complete their own operations. The trajectory of the vibrating screen can be roughly divided into the following types:
1. Linear vibration
Linear vibration: the projection of the vibration trajectory of the vibrating body (vibrating box and material) on the horizontal and vertical planes is linear, and its vibration form is called linear vibration. This type of vibrating screen is called linear vibrating screen or linear screen. Install two vibration motors of the same model on the body of the vibration equipment so that the shafts of the two vibration motors are parallel to each other. When the two vibration motors rotate in opposite directions, the two vibration motors must run synchronously, and the body produces linear vibration.
2. Rotational vibration
Rotary vibration is also called three-dimensional vibration: the projection of the vibration track of the vibrating body on the horizontal plane is a circle or ellipse, and its vibration form is called rotational vibration. This type of vibrating screen is called rotary vibrating screen. Rotary vibration can be divided into three forms: flat-rotation type vibration, vortex type vibration and double-rotation type vibration. When the projection of the vibration trajectory of the vibrating body on the vertical plane is a horizontal straight line, the vibration form is called pan-rotation vibration; when the projection of the trajectory of the vibrating body on the vertical plane is a diagonal line, the vibration form is called Vortex type vibration; when the vibration track of the vibrating body is projected as a circle or ellipse on the vertical plane, its vibration form is called compound-rotation type vibration. Rotary vibration is usually generated by the vibration equipment excited by the vertical vibration motor, and the vibration form depends on the angle between the vibration blocks at both ends of the vertical vibration motor. It is also possible to install two foot-mounted vibration motors on both sides of the vibration device, so that the rotating shaft is at a set angle, and the vibration device will also produce rotational vibration.
3. Compound vibration
The vibration of the vibrating body is produced by two sets of excitation systems, and its vibration form is called compound vibration. There are generally two types of dual-frequency compound type and double-amplitude compound type. Some special performance vibrating screening equipment uses two vibration motors of different models and different speeds, which are installed at the receiving end and the discharge end of the screening equipment, so that the receiving end exhibits large amplitude and low frequency vibration, and the output The material end presents a small amplitude and high frequency vibration, and the middle of the screening equipment overlaps two kinds of vibrations, so that the screening equipment plays a more effective screening role.
4. Circular or elliptical vibration
The projection of the vibration trajectory of the vibrating body on the horizontal plane is a straight line, and the projection on the vertical plane is a circle or an ellipse, and its vibration form is called a circle or ellipse vibration. This kind of vibrating screen is called circular vibrating screen or circular vibrating screen. Usually a vibrating motor is installed on the body of the vibrating machine to produce this kind of movement. The circular or elliptical vibration occurs on a plane perpendicular to the rotation axis of the vibration motor, and its form depends on the relative position of the vibration motor and the center of gravity of the whole machine.