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影响反击式破碎机板锤使用寿命的因素!
网址:http://www.dhfjx.cn    发布时间:2019-05-06
反击式破碎机租赁公司提示我们,反击式破碎机的板锤随转子高速回转,打击被破碎物料,与物料冲击和磨剥,因此它极易磨损。影响板锤使用寿命的因素有:板锤的材质,制造质量,被破碎物料的性质,转子圆周速度,板锤的结构,处理量等。
The rental company of counterattack crusher reminds us that the hammer of counterattack crusher rotates at high speed with the rotor, striking the crushed material, and impacting and grinding the material, so it is very easy to wear and tear. The factors affecting the service life of the hammer are: the material quality of the hammer, the manufacturing quality, the nature of the crushed material, the circumferential speed of the rotor, the structure of the hammer, the handling capacity, etc.
1. 板锤的材质
1. Material of board hammer
目前,我国主要采用高锰钢和铬合金钢等耐磨材料制造板锤。由于制造厂的热处理工艺水平不一样,致使它的力学性能差异很大,板锤的寿命也相差很大。
At present, high manganese steel and chromium alloy steel are mainly used to make plate hammer in China. Because of the different heat treatment technology level in the manufacturing plant, the mechanical properties of the hammer vary greatly, and the life of the hammer varies greatly.
2. 转子圆周速度
2. Rotor circumferential velocity
除了板锤材质影响它的寿命以外,下述原因也影响了某些破碎机的板锤寿命:由于反击式破碎机转子线速度较高,转子上装有3-6块,多达8-10块板锤。前后两块板锤转过的时间间隔仅为几十分之一秒。在这样短的时间里,只有少数物料能整块进入打击区,而大部分物料,尤其是大块物料,只有一端进入打击区,因而板锤不是打在物料块的重心上,即板锤未与整个物料块正面冲击破碎,而是进行斜碰撞。
In addition to the material of plate hammer which affects its life, the following reasons also affect the life of some crushers: due to the high linear speed of the rotor of the impact crusher, there are 3-6 pieces on the rotor, up to 8-10 pieces of plate hammer. The time interval between the front and back hammers is only one-tenth of a second. In such a short period of time, only a few materials can enter the strike zone as a whole, while most materials, especially large ones, enter the strike zone only at one end. Therefore, the plate hammer does not hit the center of gravity of the material block, that is, the plate hammer does not break up with the front impact of the whole material block, but obliquely collides.
这样,不但降低了破碎效果,而且造成物料与板锤之间产生滑动摩擦,从而引起板锤非常迅速地磨损。另外,反击板上粘有粉料后,板锤与粉料的摩擦更加严重,板锤更加迅速磨损。
In this way, not only the crushing effect is reduced, but also the sliding friction between the material and the hammer is produced, which causes the hammer to wear very quickly. In addition, the friction between the hammer and the powder is more serious and the hammer wears more quickly after the powder is adhered to the counterattack plate.
为了减少板锤磨损,转子上的板锤数目不宜过多,转子的直径不宜过小,要适当地增加扳锤的高度,并尽量地把给人物料中的粉料、泥土和水分预先筛除。
In order to reduce the wear of plate hammer, the number of plate hammers on the rotor should not be too much, and the diameter of the rotor should not be too small. The height of the wrench should be increased appropriately, and the powder, clay and water in the material should be screened as far as possible.
反击式破碎机租赁
3. 板锤的结构和固定方法
3. Structure and Fixing Method of Plate Hammer
板锤的结构和它的固定方法,对其寿命也有影响。目前,我国制造的反击式破碎机,板锤多半采用埋头螺钉固定。这种固定方法,结构简单,拆装方便,更换时不必把转子吊出机体。克服了这个缺点,板锤被固定得更加牢靠,但需要加工板锤的后凹槽。有些破碎机的板锤,从侧面插入转子凹槽中。
The structure of the plate hammer and its fixing method also have an effect on its life. At present, the counterattack crusher manufactured in China mostly uses countersunk screw to fix the plate hammer. The fixing method has the advantages of simple structure, convenient disassembly and assembly, and no need to hoist the rotor out of the body when replacing. To overcome this shortcoming, the plate hammer is fixed more firmly, but it needs to process the back groove of the plate hammer. In some crushers, the hammer is inserted into the groove of the rotor from the side.
两侧各有1:5的斜度,靠扳锤工作中产生的离心力固紧。这种结构的板锤两端还要用压板压紧,防止窜动。这种固定方法不太可靠,工作中不安全,板锤容易飞出,好不用。
Each side has a slope of 1:5, which is tightened by the centrifugal force produced in the work of the wrench. The two ends of the plate hammer of this structure are also pressed with a pressing plate to prevent movement. This fixing method is not reliable, unsafe in work, easy to fly out of the hammer, it is best not to use.
还有一种利用楔铁固定板锤,板锤放入转子凹槽中,从转子侧向,再将两侧带斜度的楔铁打入楔紧板锤。板锤预紧后,工作中在离心力作用下,板锤、楔铁和转子会越转越紧,工作可靠,但拆装困难,目前很少应用。
There is also a wedge-iron fixed plate hammer, which is placed in the groove of the rotor, from the side of the rotor, and then the wedge iron with inclination on both sides is punched into the wedge-iron hammer. After plate hammer pre-tightening, under the action of centrifugal force, plate hammer, wedge iron and rotor will turn tighter and tighter, and work reliably, but it is difficult to disassemble and assemble, which is seldom used at present.
4. 板锤的制造质量
4. Manufacturing Quality of Plate Hammer
板锤在制造过程中要严格保证重量的准确性。重量差不许超过0.5kg。将板锤安装在转子上后,要做静平衡试验,要求转子转动停止时,在任何位置上都不许退回1/10圆周。
The accuracy of weight should be strictly guaranteed in the manufacturing process of plate hammer. The weight difference should not exceed 0.5 kg. When the plate hammer is installed on the rotor, the static balance test should be done. When the rotation of the rotor stops, it is not allowed to return to 1/10 circumference in any position.
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The above wonderful content is provided by the retaliatory crusher leasing company. More wonderful content is welcome to pay more attention to our official website: http://www.dhfjx.cn! Thank you for your support.
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