开刃锤片是提高粉碎机效率的新途径

Groove-welding on hammers will enhance crusher's working efficiency

锤片有筛粉碎机对物料的粉碎效果,主要取决于锤片与物料的线速差和已粉碎到粒度要求的物料能否迅速通过筛孔,锤片与物料的线速差是影响粉碎效果关键。现有锤片有筛粉碎机在作业时,因高速旋转的锤片带动了物料旋转,使锤片与物料的线速差较小,影响粉碎效果。目前国内外饲料锤片有筛粉碎机尚未见到通过改变锤片锤头的结构,使物料与锤片撞击后,物料离开了通常的周向运动轨迹,可降低周向的线速30%-50%,提高了物料与锤片的线速差,亦然提高了撞击力及粉碎效果。经开刃锤片即锤片开坡口的试验研究,粉碎机粉碎效率可提高25%-28%。物料周向线速和对锤片的摩擦力下降,亦就降低了物料周向的离心惯性力和物料环的密度,使锤片锤头的磨损明显降低。一个不起眼的开刃锤片已申请专利,却是一项带来具有较大社会效益和经济效益的新技术,是一项节能、低碳和环保的新技术。

The linear velocity margin of hammers to handled material and the passing efficiency ofqualified granules are main influencing factors of hammer crusher, which the first one is the crucialone that decides hammer crusher＇s working efficiency. Most of the present hammer crusher＇s workingmode is： the materials in hammer crusher will rotate with its＇ high-speed rotating hammers, so therewill be knee linear velocity margin between the two. Theoretically speaking, if we change the structureof hammers＇ groove, the crashed granules＇ ordinary circular trajectory will be changed, with 30%~50%reduction of its linear velocity on tangential direction. With increased linear velocity margin of ham-mers to granules, the collision force and crashing efficiency will also be largely elevated. The effectshas been confirmed in experimental research in which hammer crusher＇s crashing efficiency obviouslyraises 25%~28% by beveling groove on the hammers. Along with reduction of linear velocity on tangen-tial direction and friction force on hammers, granule-ring＇s centrifugal inertial force and density will al-so drop, which dramatically reduce abrasion on hammers＇ groove. A common groove-welding methodon crusher＇s hammers will bring economic benefits to this feed production field, so we should stronglysupport and widespread this energy-saving, low-carbon and environmental protection technology.