In industrial production, it is usually necessary to divide various raw materials (such as iron ore, coal, gravel, etc.) and various primary products (such as concrete, edible salt, chicken essence, etc.) into several levels according to the particle size distribution of raw materials, or to remove the moisture, residue, etc. in order to carry out the next step of production and processing and improve product quality, which requires the use of vibrating screen equipment.
Vibrating screen is a common screening mechanical equipment, which is widely used in various fields. From mining to metallurgical industry, from decorative building materials to electric power engineering, from road and railway bridges to food chemical plants, vibrating screens are often in operation everywhere. It can be said without exaggeration that it is impossible to produce qualified and high-quality products without vibrating screen. The more common vibrating screen includes circular vibrating screen and linear vibrating screen. The track of the screen box of the circular vibrating screen (which can be seen from any point on the screen body) is round or elliptical. Generally, the vibrator of circular vibrating screen has only one shaft, so it is also called double-shaft vibrating screen. The round vibrating screen is mainly used for the classification of raw materials with different particle size distribution. It is generally installed askew, with seat type and hanging type. It works reliably and has high screening efficiency. The track of screen box of linear vibrating screen is parallel line or close to parallel line. It has two shafts, so it is also called two-shaft vibrating screen.
The linear vibrating screen is installed horizontally or obliquely. This type of vibrating screen is compact in structure and stable in operation. It is widely used for drying, desliming and media removal of various raw materials, and also for classification of dry and wet test grades of medium and coarse grained raw materials.
So, how does the vibrating screen work? How does it screen raw materials? Everyone uses an eccentric body on the shaft and uses the motor to drive it to rotate. At this time, the eccentric body creates an outward force. The greater the quality of the eccentric body, the farther the distance from the shaft center to the center, the higher the speed ratio of the shaft, the greater the centripetal force.
Unlike the car turning, this eccentric body does a uniform circular motion, resulting in a continuous force along the direction of the circle. This is the shaker. If it is installed at a proper position of the screening machine in a proper way, it can push the screening machine to move in a uniform circular motion, which is caused by the circular vibrating screen. Install two shafts with eccentric bodies side by side and let them rotate at the same pace and at the same speed in the opposite direction. At this time, the force caused by the two eccentric bodies in the horizontal direction is the same size and the direction is opposite, so they offset each other; The forces with the same size and direction perpendicular to the two directions are summed, which will result in uniform linear motion, which is the principle of linear vibrating screen.
Post time: Feb-06-2023