Several factors affecting impact time of impact crusher
When designing and optimizing impact crushers, impact time is an important parameter that must be considered. Impact time refers to the duration from the start of impact contact to contact separation, which has a great impact on the structure design, crushing efficiency, crushing ratio and production capacity of the crusher. The following analyzes several factors that affect the impact time one by one to provide theoretical support for the design and optimization of the crusher.
(1) Different working conditions
Suppose that after the rock is impacted by the slab hammer, it flies to the counterattack board at a certain speed, and the rock itself is not broken. Analyze the maximum displacements at the moment when the hammer just touches the rock and the moment when the hammer just separates from the rock. It is found that the maximum displacement of the rock occurs at the point where the center of the rock below the rock and the arc edge of the hammer are in contact.
(2) Impact speed
Changing the size of the impact velocity, other conditions remain unchanged, the impact time under different impact velocity is analyzed, it is found that the impact time does not vary greatly with the increase of the impact velocity, and the impact velocity and the impact time are basically linear. The impact time is shorter at a smaller impact speed.
(3) Material size
Selecting rocks of different particle sizes and analyzing the obtained impact time shows that the larger the material diameter, the longer the impact time. And the impact time-impact velocity curves between materials of different particle sizes are basically parallel.
(4) Material shape
The shape of the material may be various and irregular. Through the analysis of the impact time when the shape of the material is different, it is concluded that as the side length of the material increases, that is, the shape becomes larger, the impact time also increases. However, the impact time between rocks with the same grain size and different shapes is not much different, and the comparability is not strong.
(5) Wear of the blow bar
When the hammer wear is different, the impact time does not always change greatly, so the impact on the impact time is small.
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