ZTA陶瓷復合高鉻鑄鐵板錘

DJM ceramic composite impact crusher spare parts (blow bar) technology introduction

反擊式破碎機與顎式破碎機不同，其主要的原理是利用物料在高速中產生的沖擊作用而進行破碎作業的，進入破碎機機體的物料在設定的流道內，在第一、第二反擊板沖擊面上經過一定時間和一定沖程的反復沖擊作用，最終實現物料破碎。這個反擊破碎機工作的過程中，物料的破碎主要是由高速沖擊在板錘上時發生的。由于反擊式破碎機內部的破碎腔較大，在反擊破碎機板錘的作用下，物料有足夠的空間來充分加速并具備一定的動能，從而產生足夠的沖擊力，以二倍的轉子速度撞擊反擊板，實現部分破碎，而后一部分物料會在加速的過程中在空中相互撞擊而得到進一步粉碎。目前廣泛使用的錘頭都是采用高鉻鑄鐵制造。當物料與高速旋轉的錘頭撞擊時，物料尖角壓入錘面，形成撞擊坑，其沖擊力全部轉為對錘面的壓應力，此時錘頭屬于沖擊鑿削磨損。當物料以一定角度撞擊錘頭或錘頭與篦板相互搓磨時，沖擊力分解為平行錘面的切向應力，對錘頭表面進行切削，形成一道道切削溝槽，則為切削沖刷磨損。針對上述問題為進一步提高其耐磨壽命，DJM 選用高Cr陶瓷復合材料，即在高Cr材料表面鑄入陶瓷顆粒形成陶瓷金屬復合材料加強筋，這層復合層的耐磨性能可達高Cr材料的3 – 4倍，同時這一復合層的厚度可制成達到原備件厚度的1/3。陶瓷復合材料板錘的壽命約為高Cr合金板錘的2倍以上。

 

Impact crusher is different form jaw crusher, its main principle is to use the material in high speed impact and crushing operations, the material into the crusher body in a certain runner , on the first and second impact plate shock after a certain time and stroke of repeated impact, realize the material break finally .during the impact work process, the material broken is mainly depended on the high speed impact on the blow bar. Due to large internal crushing cavity, the material has enough space to full speed and have a certain kinetic energy under the blow bar, thereby has enough impact energy to realize the material part broken. And other part of the material will be broken through rattled one against another during the accelerate processing in air.

Currently, the blow bar is widely used high chromium cast iron manufacturing. When the material with the high speed rotating bar impact, material sharp corner pressed into the bar surface and form a impact crater, its impact energy all changed to bar surface compressive stress, the impact bar head belong to chisel cutting wear and tear.

When the material impact the bar with a certain angle or grind with grate plate, impact energy is decomposed into parallel bar tangential stress, cutting the bar surface to form some cutting groove, it is called cutting erosion wear.

In order to get a further improvement of the wear life, DJM selects high-Cr ceramic composite materials, which forms the ceramic metal composite reinforcement through injection of ceramic particles into the high-Cr material , the composite layer wear-resisting property is than high Cr material 3-4 times, at the same time, the composite layer thickness can be made to a third of the thickness of the original spare parts. Ceramic composite material blow bar life is longer than 2 times of a high Cr alloy blow bar.

  

附圖-1-1 高Cr陶瓷復合板錘外觀圖      附圖-1-2 高Cr陶瓷復合板錘外觀局部放大圖

Picture 1-1 external view                Picture 1-2 partial enlargement of appearance

 

 

附圖-1-3 高Cr陶瓷復合板錘外觀圖      附圖-1-4 高Cr陶瓷復合板錘局部解剖圖

Picture 1-3 external view                Picture 1-4 Part sectioned view

 

 

附圖-1-5 高Cr陶瓷復合板錘外觀局部放大圖

Picture 1-5 partial enlargement of appearance