Reasons And Solutions About Fracture In Vibrating Screen

Vibrating Screen Fracture Reasons And Solutions

According to the principle of fracture mechanics, in the operation process of vibrating screen, the deck base shakes and has bending fatigue. Thus, the deck base, sideboard and some other parts will easily deform or fracture. Many customers wonder the reasons about this problem. In this article, we mainly introduce the reasons and solutions for fracture of the vibrating screen.

Failure Of Anti-Vibrating Spring

After long-time service, permanent deformation occurs in the anti-vibration spring due to rubber aging or long-term stress, leading to spring failure. The failure of anti-vibrating spring will cause the height difference of the fulcrums of the 4 sets of anti-vibrating springs. And the amplitudes of the parts in vibrating screen will also be different, causing the fracture of connection parts in vibrating screen or the crack of welded junctions of connecting pieces.

To solve this problem, operators should check the anti-vibration spring regularly. Besides, the spring is generally made of 60Si2MnA, and its heat treatment hardness should reach HRC 45–50.

Deviation Of Eccentric Gear Weight In Vibration Exciter

The eccentric block in the vibration exciter is mainly used to make the vibrating screen vibrate, and its weight directly affects the amplitude of the vibrating screen. If there is deviation in the eccentric gear weight, the excited force produced in the operation process will disperse. When reflected on the screen deck, it presents inconsistent amplitudes at various positions, resulting in fracture of connecting components or cracks at welded joints.

The Plumb Line of the Eccentric Block Does Not Coincide with the Vertical Center Line

While installing the vibration exciter, after connecting the vibration exciter with universal coupling, with the effect of transmission shaft torque force, the plumb line of eccentric gear will not coincide with the natural plumb line. In this case, the amplitudes of each part in the vibrating screen will not be uniform, causing fracture of connecting parts or cracks at welded joints.

The Screen Plate Is Too Thin

Another reason that causes the fracture of the vibrating screen is that the screen plate is too thin. To solve this problem, operator should thicken the side board or add an extra board in order to strengthen the rigidity of vibrating screen. In this case, the deck base will not so easy to fracture.