Three connected shale shakers supplier introduction: Due to the harsh working environment and high working intensity of the vibrating screen, its related parts are prone to failure during operation, which will cause a decrease in screening efficiency and even cause safety accidents. The common fault types of the vibrating screen mainly include abnormal vibration of the screen box, damage of the vibrator bearing, fatigue cracks of the excitation beam, and cracking of the side plate of the screen box. The following is a brief introduction to these common fault types.
Abnormal vibration of screen box
The abnormal vibration of the screen box mainly refers to the deflection or swing of the screen box during the operation of the vibrating screen, which leads to uneven screening of materials and a decrease in screening efficiency. Among them, the stiffness change of the support spring is the main cause of the abnormal vibration of the screen box. Most of the support springs are in groups of three or four, and the support box vibrates. Due to the uneven support surface or long-term load operation, the four sets of support springs are different in free height or rigidity, which causes the screen box to be affected at each support point. The restoring force is inconsistent, resulting in abnormal vibration. Long-term abnormal vibration will reduce the working efficiency of the vibrating screen. Due to torsional vibration, the side plate of the screen box will generate shear stress and cracks will easily appear. In severe cases, the spring will break and cause safety accidents.
Fatigue Cracks in the Exciter Girder
The exciter beam is mainly used to install the exciter and transmit the exciting force. Under the normal working condition of the vibrating screen, the gravity of the exciter and the periodically changing exciting force generated, the inertial force generated by the vibration of the screen box and the gravity of the girder itself are all applied to the girder of the vibrator, making its stress extremely complicated. . Since the exciter girder is made of tailor-welded steel plates, stress concentration will occur at the weld seam during the welding process, and heat treatment is required to reduce stress and improve strength. However, due to the long-term working conditions of high strength and complex stress, its structure is prone to fatigue damage and cracks.
Screen box side plate cracked
Three connected shale shakers supplier introduction: When the vibrating screen is working normally, the exciting force is on the same straight line as the gravity of the screen machine itself, and there will be no lateral force as a whole. If the screen box vibrates abnormally, resulting in yaw or yaw, at this time the direction of the exciting force does not coincide with the direction of gravity, and the whole will generate a lateral force component. The side plate is a thin plate structure, if subjected to excessive lateral force, it will be distorted and deformed, and it will easily crack in the long run, resulting in a decrease in the service life of the screen machine.