1.Introduction YK-block eccentric vibrating screen is YA-type shafteccentric vibrating screen replacement products. YK-block eccentric shakerscreen box trajectory is circular, it is widely used in coal preparation,mineral processing, building materials, electricity, water, light industry,building materials and other departments to do the dry classification, it canalso be replaced with the transformation of the old factory trialspecifications of the old-fashioned single-axis and single-axis sieve sieveshaker and self-centering. Advanced screening machine technical parameters ,high strength   vibration, largecapacity, high screening efficiency. The motor directly drag amplitudeadjustable eccentric block vibrator, simple structure, easy maintenance, longservice life. 2.Workingprinciple YK-block eccentric vibrating screen consists of screenbox, screen, vibrators and vibration damping springs and other components.Vibrator mounted on the side plate of the screen box, driven by a motor throughthe coupling rotates, centrifugal force generated to force the screen box vibrate.YK-block eccentric circular vibrating screen is a single quality elasticsystem, motor through the tire coupling, so that the exciter eccentric blockproduce high-speed rotation. Operation of the eccentric block with greatcentrifugal force, stimulate sieve boxes have a certain amplitude circularmotion, inclined sieve screen surface material in the screen box passed by theimpulse to produce a continuous throwing motion, the materials and the processof screen surface encounter through the manipulation of the particles smallerthan sieve sieve to achieve classification. 3. Feature 1)Equipment maintenance is simple and convenient, the machine runs efficiency hasimproved significantly. 2) Usingcross shaft universal joint shaft couplings and other rubber or flexibleconnection and smooth operation. 3) Sievemachine structure tends to simplify, help to improve the level of manufacturingprocess equipment and assembly accuracy. 4) Sieve,sieving efficient handling capacity greater use of machine cycles and longerlife. 5) Exciterusing block eccentric forms, not only the eccentric mass exciter singletexcitation force increases, and random excitation force can control, modulardesign and ease of use. 4.Selection tips 1)  Installationmethods are bearing type and hanging and both with and other forms, selection,be sure to consider carefully. 2) YK-block eccentric vibrating screen series YA-typeshaft eccentric vibrating screen replacement products, there are 20specifications and stereotypes were open-and closed two structural forms. Thisseries of vibrating screen with light and heavy of the points for differentlevels of granularity screening materials, please make sure the voltageselection system and the presence of explosion.