Vibrating screen is a supporting equipment for sand production line. The woven structure of vibrating screen mesh is metal wire pre-bent into a corrugated shape, ensuring that two corrugated screens are in the same position to maintain the size of the mesh.
There are various types of vibrating screens, such as bidirectional corrugated, tightly corrugated, bidirectional isolated corrugated, bidirectional isolated corrugated, flat top corrugated, unidirectional corrugated, and with a solid structure. It is widely used in industries such as mining, coal mining, construction, glass factories, petroleum, hardware and other industries. There is dedicated mesh for pig farming.
unqualified screen quality, insufficient tension of the screen, incorrect direction of the vibrating motor, accumulation of clay, etc.
The tension of vibrating screen mesh is insufficient, resulting in high-strength grinding causing vibration of the screen, usually causing breakage or damage along the edge or edge pressure strip of the screen. The unqualified quality of screen is also a common cause. The screen generally has an upper screening layer and a lower stress layer, and these two layers require close adhesion to each other.
If the pre-tensioning process of the screen is poor, when the lower stress layer of the screen is tightened, the screening layer is not tightened, and the chip-throwing force is greatly reduced during operation, which cannot discharge the chips. When the vibrating motor rotates in the wrong direction, the on-site operators according to the experience of using a single-axis vibrating screen or linear vibrating screen in the past think that as long as the chips move forward, it is okay. However, this method is not suitable for translating elliptical vibrating screens. If the electric motor rotates incorrectly towards the inner side, the ejection angle is also 45° forward, but the chips have a force to roll backwards. At this time, the velocity of the chips moving forward is much slower, which causes the chips to stay longer on the vibrating screen and even unable to be discharged.
When the screen box is running, press the stop button of the electric control box. The vibrating screen will slowly stop. Remove the vibrator cover and observe the elliptical trajectory formed by the small dots on the side plate when the vibrating screen is running. It should roll towards the sand outlet as the correct direction.
Check whether the eccentric blocks are rotating outward, switch any two phase lines of the incoming power supply in the electric control box, sprinkle some sand on the screen, and take measures such as increasing the discharge rate of sand can effectively prevent the damage of the vibrating screen. Of course, clay accumulation and small vibration amplitude make it difficult to screen under polymer drilling fluid conditions, so it cannot effectively overcome the adhesive force of cuttings (clay) and can cause rapid damage to the vibrating screen.