颚式破碎机/复摆式颚式破碎机/河南郑州颚式破碎机厂家/颚破机PE200x300
颚式破碎机的工作部分是两块颚板，一是固定颚板（定颚），垂直（或上端略外倾）固定在机体前壁上，另一是活动颚板（动颚），位置倾斜，与固定颚板形成上大下小的破碎腔（工作腔）。活动颚板对着固定颚板做周期性的往复运动，时而分开，时而靠近。分开时，物料进入破碎腔，成品从下部卸出；靠近时，使装在两块颚板之间的物料受到挤压，弯折和劈裂作用而破碎。
颚式破碎机（颚破）分简单摆动颚式破碎机和复杂摆动颚式破碎机两种类型，它们的工作原理很相似，动颚的运动轨迹有较大的差别。简单摆动颚式破碎机，因动颚是悬挂在支承轴上，所以当动颚作往复运动时，动颚上各点的运动轨迹都是圆弧形，而且水平行程上小下大，而以动颚的底部（排矿口处）为最大。由于落入破碎腔的矿石，上部均为大矿块，往往达不到矿石破碎所必需的压缩量，故上部的大块矿石，需反复压碎多次，才能破碎。破碎负荷大都集中在破碎腔的下部，整个颚板没有均匀工作，从而降低了破碎机的生产能力。同时这种破碎机的垂直行程小，磨剥作用小，排矿速度慢。但颚板的磨损较轻，产品过粉碎少。复杂摆动颚式破碎机，由于其动颚又是曲柄连杆机构的连杆，在偏心轴的带动下，动颚上点的运动轨迹近似椭圆形，椭圆度是上小下大，其上部则近似圆形。这种破碎机的水平行程正好与简摆颚式破碎机相反，其上部大下部小，上部的水平行程约为下部的1.5倍，这样就可以满足破碎腔上部大块矿石破碎所需的压缩量。同时整个动颚的垂直行程都比水平行程大，尤其是排矿口处，其垂直行程约为水平行程的3倍，有利于促进排矿和提高生产能力。实践表明，在相网条件下，复摆颚式破碎机的生产能力比简摆颚式破碎机高30%左右。但颚板的磨损快，产品过粉碎严重。
Jaw crusher/Compound pendulum jaw crusher/Zhengzhou jaw crusher manufacturer in Henan/Jaw crusherPE200x300
The working part of a jaw crusher consists of two jaw plates. One is a fixed jaw plate (fixed jaw), which is vertically (or slightly inclined at the upper end) fixed on the front wall of the machine body. The other is a movable jaw plate (movable jaw), which is inclined in position and forms a crushing chamber (working chamber) with a larger upper part and a smaller lower part with the fixed jaw plate. The movable jaw plate performs periodic reciprocating motion against the fixed jaw plate, sometimes separating and sometimes approaching. When separated, the material enters the crushing chamber and the finished product is discharged from the lower part; When approaching, the material placed between the two jaw plates is crushed by compression, bending, and splitting.
Jaw crushers (jaw crushers) are divided into two types: simple swing jaw crushers and complex swing jaw crushers. Their working principles are very similar, but the motion trajectory of the moving jaw has significant differences. A simple swing jaw crusher, because the moving jaw is suspended on a supporting shaft, the motion trajectory of each point on the moving jaw is arc-shaped when it performs reciprocating motion, and the horizontal stroke is small in the upper part and large in the lower part, with the bottom of the moving jaw (at the discharge port) being the largest. Due to the fact that the ore falling into the crushing chamber consists of large ore blocks in the upper part, it often cannot achieve the necessary compression for ore crushing. Therefore, the large ore blocks in the upper part need to be repeatedly crushed multiple times before they can be crushed. The crushing load is mostly concentrated in the lower part of the crushing chamber, and the entire jaw plate does not work evenly, thereby reducing the production capacity of the crusher. At the same time, this type of crusher has a small vertical stroke, low grinding and stripping effect, and slow ore discharge speed. But the wear of the jaw plate is relatively light, and the product is less crushed. The complex swing jaw crusher, due to its moving jaw being a connecting rod of the crank connecting rod mechanism, is driven by an eccentric shaft, and the motion trajectory of the upper point of the moving jaw is approximately elliptical, with a small ellipticity at the top and a large ovality at the bottom, while its upper part is approximately circular. The horizontal stroke of this crusher is exactly opposite to that of a simple swing jaw crusher, with a larger upper part and a smaller lower part. The horizontal stroke of the upper part is about 1.5 times that of the lower part, which can meet the compression requirements for crushing large ore blocks in the upper part of the crushing chamber. At the same time, the vertical stroke of the entire moving jaw is greater than the horizontal stroke, especially at the discharge port, where the vertical stroke is about three times the horizontal stroke, which is conducive to promoting ore discharge and improving production capacity. Practice has shown that under grid conditions, the production capacity of a compound pendulum jaw crusher is about 30% higher than that of a simple pendulum jaw crusher. But the wear of the jaw plate is fast, and the product is severely crushed.
