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When the vibrating screen is working,the synchronous reverse rotation of the two motors causes the exciter to generate a reverse exciting force,forcing the screen body to move the screen longitudinally,so that the material on the material is excited and periodically throws a range.Thereby completing the material screening operation.Suitable for quarrying sand and gravel materials,it can also be used for product classification in coal preparation,mineral processing,building materials,electric power and chemical industries.The working part is fixed and the material is screened by sliding the material along the working surface.Fixed sieves are one of the more widely used in concentrators and are generally used for pre-screening before coarse or medium crushing.It is simple in structure and easy to manufacture.It does not consume power and can directly discharge the ore to the screen surface.The main disadvantages are low productivity and low screening efficiency,generally only 50-60%.The working surface is composed of a horizontally arranged rolling shaft with a plate on which the fine material passes through the gap between the rollers or the plates.The bulk material is moved by the roller to one end and discharged from the end.Such sieves are rarely used in concentrators.The working part is cylindrical,and the whole sieve is rotated around the axis of the cylinder,and the axis is generally installed with a small inclination angle.The material is fed from one end of the cylinder,the fine grade material is passed through the screen opening of the cylindrical working surface,and the coarse material is discharged from the other end of the cylinder.The rotary screen has a low rotation speed,stable operation and good dynamic balance.However,the mesh hole is easy to block,the screening efficiency is low,the working area is small,and the productivity is low.The concentrator rarely uses it for screening equipment.

The body is oscillated or vibrated in a plane.According to its plane motion trajectory,it is divided into linear motion,circular motion,elliptical motion and complex motion.Shaking screens and vibrating screens fall into this category.During operation,the two motors are synchronously placed in opposite directions to cause the exciter to generate a reverse exciting force,forcing the screen body to move the screen longitudinally,so that the material on the material is excited and periodically throws a range,thereby completing Material screening operations.The rocking screen is a crank connecting rod mechanism as a transmission component.The motor drives the eccentric shaft to rotate through the belt and the pulley,and the connecting rod reciprocates the body in one direction.

The moving direction of the body is perpendicular to the center line of the strut or the suspension rod.Due to the swinging motion of the body,the speed of the material on the screen surface moves to the discharge end,and the material is simultaneously sieved.The shaking screen has higher productivity and screening efficiency than the above sieves.