I. overview

直线筛利用振动电机激振作为振动源，使物料在筛网上被抛起，同时向前作直线运动，物料从给料机均匀地进入筛分机的进料口，通过多层筛网产生数种规格的筛上物、筛下物、分别从各自的出口排出。具有耗能低、产量高、结构简单、易维修、全封闭结构，无粉尘溢散，自动排料，更适合于流水线作业。

Linear screen uses vibration motor as vibration source, so that the material is thrown up on the screen, while moving forward in a straight line. Material evenly enters the inlet of the screening machine from the feeder. Several specifications of screen top, screen bottom are produced through multi-layer screen, and are discharged from their respective outlets. The utility model has the advantages of low energy consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust overflow, automatic discharging, and is more suitable for pipeline operation.

两层直线筛又叫双层直线筛：二层筛网，三个出料口，他的主要功能把加入设备的物料按大小不同分成三种，通常的作用是除杂，通过两层筛网网孔设定粒度范围，除掉大的和小的物料，留下需要的物料。

Two-layer linear screen is also called double-layer linear screen: two-layer screen, three outlets, his main function is to add equipment materials according to the size of three different, the usual role is to remove impurities, through two-layer screen mesh set particle size range, remove large and small materials, leaving the material needed.

二、工作原理

Two, working principle

振动筛工作时，两电机同步反向旋转使激振器产生反向激振力，迫使筛体带动筛网做纵向运动，使其上的物料受激振力而周期性向前抛出一个射程，从而完成物料筛分作业。

When the vibrating screen works, the synchronous reverse rotation of the two motors causes the vibrator to produce the reverse exciting force, forcing the screen body to drive the screen to do the longitudinal movement, so that the material on the screen is periodically thrown forward by the exciting force, thus completing the material screening operation.

直线振动筛是双振动电机驱动。当两台振动电机做同步、反缶旋转时，其偏心块所产生的激振力在平行于电机轴线的方向相互抵消，在垂直于电机轴的方向叠为一合力，因此筛机的运动轨迹为一直线。两电机轴相对筛面有一倾角，在激振力和物料自重力的合力作用下，物料在筛面上被抛起跳跃式向前作直线运动，从而达到对物料进行筛选和分级的目的。适用于粒度在0.074-5mm、含水量小于70%、无粘性的各种干式粉状物料的筛分。最大给料粒度不大于10mm。

The linear vibrating screen is driven by two vibratory motors. When two vibrating motors rotate synchronously and inversely, the exciting force produced by the eccentric block cancels each other in the direction parallel to the axis of the motor, and superposes into a combined force in the direction perpendicular to the axis of the motor, so the motion track of the screen machine is a straight line. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the gravity of the material, the material is thrown up on the screen surface and jumps forward in a straight line, so as to screen and classify the material. It is suitable for sieving of all kinds of dry powder materials with a particle size of 0.074-5mm and less than 70% water content. The maximum feeding granularity is not greater than 10mm.