JT型鋸齒波跳汰機是一種新型的跳汰機是現代重選設備之一，目前已形成系列推廣使用。這種跳汰機采用電磁無級調速，鼓動均勻，礦流平穩，對寬別入選物料適應性強，對中細粒選別效果好，且省水，由于其處理能力大，選別粒度范圍廣，操作維護簡單，主要于選別砂金、鎢礦、錫礦、赤鐵礦和海濱砂礦。

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.

傳統的跳汰機多為圓周偏心驅動，其跳汰脈動曲線多為正弦波形，由隔膜運動產生的上升、下降水流速度和作用時間基本相同，因此，不利于跳汰床層松散及礦粒按比重分層，從而影響了設備的選別比和回收率。

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.

鋸齒波跳汰機是根據跳汰床層理論分層規律，在傳統跳汰機基礎上進行研制和改進的一種節能重選設備，其跳汰脈動曲線呈鋸齒波形使上升水流快于下降水流；上升時間短、下降時間長，克服了正弦波，脈動曲線跳汰機產生的上升、下降水流和作用時間相同的缺陷，增強了床層的松散度，緩解了吸入作用，使礦物中的重礦粒得到充分沉降，大大提高了設備的選別比能力和回收率。其與正弦波跳汰機進行工業試驗對比；鋸齒波跳汰機作業回收率比正弦波跳汰機分別提高Sn:3.01%,W:5.5%,Pb:1.63%,Zn:2.04%;耗水量減少30%-40%，占地面積減少1/3，且沖程可調整，由于采用電磁調速電機進行拖動使沖次可無級調節。其參數達到國內先進水平，是目前較理想的節能重選設備之一。

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.

圖3：凸輪箱結構圖 Figure 3: Structure of Cam  Box
 1.箱體   2.杠桿   3.6.軸承7206   4.7.8調整壓蓋   5.齒輪軸   9.軸承313   10.軸承8112   11.曲軸   12.15.23.27.螺母   13.防塵套   14.沖桿   16. 凸輪   17.沖桿座   18.軸
 19.關節軸承內圈   20. 關節軸承外圈   21.軸套   22.軸   24.齒輪   25.軸承2216  
 26.調整角度   28.軸   29.軸承7207   30.軸承外套(滾輪)   31.后蓋板   32.調整螺絲
 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、設備安裝
IV. Equipment Installation

跳汰機必須將機架底面安裝在水平基礎上，保證槽體內篩網的傾斜度在設計范圍內。

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:處理量和補給水量隨給礦石粒度、礦石性質及作業條件不同而異。