JT型锯齿波跳汰机是一种新型的跳汰机是现代重选设备之一，目前已形成系列推广使用。这种跳汰机采用电磁无级调速，鼓动均匀，矿流平稳，对宽别入选物料适应性强，对中细粒选别效果好，且省水，由于其处理能力大，选别粒度范围广，操作维护简单，主要于选别砂金、钨矿、锡矿、赤铁矿和海滨砂矿。

JT  sawtooth wave jig is a new type of jigs. It is one of the types of modern  gravity separation equipment. New it has formed series whose use is expanded.  Such type of jig uses electromagnetic stepless speed regulation which features  even rotation, smooth ore current, strong adaptability to selected materials,  good separation effects of medium and fine grains,   and water saving. Since such jigs have large  handling capacity and wide range of sorting particle sizes as well as are easy  for operation and maintenance, they are mainly used to sort alluvial gold,  tungsten ores, tin ores, hematite, and beach placer.

传统的跳汰机多为圆周偏心驱动，其跳汰脉动曲线多为正弦波形，由隔膜运动产生的上升、下降水流速度和作用时间基本相同，因此，不利于跳汰床层松散及矿粒按比重分层，从而影响了设备的选别比和回收率。

Traditional  jigs mostly adopt circumferential off-center drive. Their jigging pulsation  curves are mostly sine waves. The ascending and descending water flow velocity  and action time produced by septal movement are basically the same. These  hinder the loosening of jig beds and layering of ore grain according to gravity.  Therefore, the sorting ratio and recovery rate of equipment are affected.

锯齿波跳汰机是根据跳汰床层理论分层规律，在传统跳汰机基础上进行研制和改进的一种节能重选设备，其跳汰脉动曲线呈锯齿波形使上升水流快于下降水流；上升时间短、下降时间长，克服了正弦波，脉动曲线跳汰机产生的上升、下降水流和作用时间相同的缺陷，增强了床层的松散度，缓解了吸入作用，使矿物中的重矿粒得到充分沉降，大大提高了设备的选别比能力和回收率。其与正弦波跳汰机进行工业试验对比；锯齿波跳汰机作业回收率比正弦波跳汰机分别提高Sn:3.01%,W:5.5%,Pb:1.63%,Zn:2.04%;耗水量减少30%-40%，占地面积减少1/3，且冲程可调整，由于采用电磁调速电机进行拖动使冲次可无级调节。其参数达到国内先进水平，是目前较理想的节能重选设备之一。

Sawtooth  wave jigs are a kind of energy-saving gravity equipment development and  improved on the basis of traditional jigs according to the theoretic layering  law of jig beds. Their jigging pulsation curves take the shape of sawtooth  waveform which gets the ascending water to travel more rapidly than the  descending water. The ascending time is short while the descending time is  long. The problem that the ascending and descending water flow and action time  produced by sine wave and pulsation wave are the same is solved. The looseness  of the bed is strengthened and suction function is alleviated so that the heavy  ore grains in the minerals are able to precipitate fully and the sorting ratio  ability and recovery rate of equipment are largely improved. Compared with sine  wave jigs through industrial tests, the recovery rate of sawtooth wave jigs are  higher than that of sine wave jigs respectively in Sn:3.01%, W:5.5%, Pb:1.63%,  and Zn:2.04%. The water consumption is reduced by 30%to 40%. The area of  flooring area is reduced by one-third and the stroke can be adjusted. Since  electromagnetism governing-speed motors are adopted for dragging to enable the  jig frequency to be steplessly regulated and their parameters reached advanced  domestic level, such jigs are one of the ideal types of energy saving gravity  separation equipment.

图3：凸轮箱结构图 Figure 3: Structure of Cam  Box
 1.箱体   2.杠杆   3.6.轴承7206   4.7.8调整压盖   5.齿轮轴   9.轴承313   10.轴承8112   11.曲轴   12.15.23.27.螺母   13.防尘套   14.冲杆   16. 凸轮   17.冲杆座   18.轴
 19.关节轴承内圈   20. 关节轴承外圈   21.轴套   22.轴   24.齿轮   25.轴承2216  
 26.调整角度   28.轴   29.轴承7207   30.轴承外套(滚轮)   31.后盖板   32.调整螺丝
 1. Box   2. Level   3.6 Bearing 7206   4.7.8   Adjustment gland   5. Gear  shaft   9. Bearing 313   10. Bearing 8112   11. Crank shaft   12.15.23.27  Nut   13. Dust cover   14. Drill drift   16. Cam   17. Drill drift seat   18. Shaft    19. Joint bearing inner ring   20.  Joint bearing outer ring   21. Shaft  sleeve   22. Shaft   24. Gear    25. Bearing 2216   26. Adjustment  angle   28. Shaft   29. Bearing 7207   30. Bearing cover (roller)   31. Back cover plate   32. Adjusting screw

四、设备安装
IV. Equipment Installation

跳汰机必须将机架底面安装在水平基础上，保证槽体内筛网的倾斜度在设计范围内。

For the jigs, the  bottom surface of the frame must be installed horizontally to ensure the  gradient of the screen in the tank is within the design scope.

注:处理量和补给水量随给矿石粒度、矿石性质及作业条件不同而异。