In sand and gravel plants, you can often see impact crushers and hammer crushers, but it seems that more businesses choose impact crushers. What is the reason for this? There are certain differences between the impact crusher and the hammer crusher in terms of technical structure, working principle, processing materials, and maintenance costs. We will make a detailed comparison of this and take a look at the advantages of the impact crusher over the hammer crusher!
1. Technical structure
There are still some differences in the structure of impact crusher and hammer crusher. For the crushing cavity, the crushing cavity for counter-attack is relatively large, and the feed inlet is also relatively large. When the material enters the crushing cavity of the counterattack from the feed inlet, the material is not only impacted by the hammer, but also repeated impacts between the material and the counterattack plate and between the material and the material, so the crushing effect is more sufficient. Better realize the production of bulk materials. In comparison, the crushing cavity of the hammer crusher is smaller, and the sealing performance is better than that of the impact crusher. When the material is crushed and processed, it will produce less dust pollution, which has the advantage of environmental protection.
2. Working principle
There is a big difference between impact crusher and hammer crusher when crushing materials, which is caused by the difference of the plate hammer. Inside the impact crusher, the plate hammer greets the material from bottom to top to crush the material, and throws the material onto the upper impact plate, while the hammer crusher strikes and crushes the material in the direction in which it falls. In the counterattack, the rotor rotates clockwise, and the blower faces the material from bottom to top, while inside the hammer, the rotor rotates counterclockwise, and the hammer head strikes in the direction in which the material falls.
Both counterattack and hammer crushing equipment can realize the adjustment of the particle size of the finished product. Since the impact crusher has no grate sieve at the bottom, the adjustment of the product particle size is mainly controlled by adjusting the rotor speed or diameter, adjusting the opening size of the distributor, and adjusting the gap of the grinding chamber. For the hammer crusher, the adjustment of the particle size of the finished product can be controlled by adjusting the size of the sieve plate gap. According to this situation, the impact crusher can more effectively process materials with large water content and avoid clogging situation.
3. Handling materials
Due to the difference in technical structure and working principle, the impact crusher can not only handle softer materials, but also harder materials, while the hammer crusher can only handle materials with lower hardness. Because there is no grate bar at the bottom of the impact crusher, the product size is determined by the gap between the impact plate and the hammer head, so when the water content of the processed material is too large, it can effectively avoid the phenomenon of blocking the bar when crushing wet materials. The hammer crusher increases the possibility of clogging due to the bottom degree of the abalone, so it cannot handle materials with high humidity. In comparison, the working range of the impact crusher is wider.
4. Maintenance cost
In the early purchase, the price of counterattack is generally higher than the price of hammer. However, due to the difference in structure and work between impact crusher and hammer crusher, there will be certain differences in later maintenance.
The wear of the hammer of the impact crusher only appears on the side facing the material, and the metal utilization rate of the hammer of the impact crusher can be as high as 45%-48%. At the same time, the impact crusher frame part is a three-part structure, only need to open the rear casing of the crusher; you can replace the hammer, impact plate, lining board and other maintenance operations, and the impact of the crusher parts. The interchangeability is strong, and the variety of wearing parts is small, which is convenient for the purchase and management of spare parts.
The hammer crusher has more than 100 hammer heads. It takes a lot of time and manpower to replace a set of hammer heads, and the cost of overhaul and maintenance is relatively high. The broken rotor, bottom screen, grille, etc. may also be worn during work, and replacement is relatively complicated.
Through the above comparison, we can know that if the material processed by the sand and gravel plant is harder or softer, the impact crusher is more inclined. On the contrary, the hammer crusher is selected. At the same time, it can also reduce the later operating cost of the equipment and improve its economy benefit. In actual production, some merchants may choose hammer crushers due to different jobs. The specific situation needs to be communicated with the merchants in detail. Luoyang Dahua welcomes customers to come to inquire about the purchase of impact crushers and hammer crushers. Our service purpose is to solve all problems and troubles for customers and achieve long-term cooperative relations.