The Development History And Present Situation Of E CrusherLast Update:2020-05-03 09:18:24
As early as 1858, the jaw crusher was invented by Blake of the United States, which is called the jaw crusher for short. Prior to that, in 1806, a roller crusher driven by a steam engine appeared. In 1878, the United States developed a rotary crusher with continuous crushing action. Its production efficiency is higher than that of the jaw crusher with intermittent crushing action. In 1895, William of the United States invented the impact crusher with lower energy consumption. The modern crushing machinery was created after the steam engine, electric motor and other power machinery were gradually improved and popularized, such as impact crusher, cone crusher and so on.
When the world's leading jaw crusher came out, its structure was double elbow plate. By the 1980s, the feed size of the large jaw crusher, which can crush 800 tons of materials per hour, had reached about 1800 mm. Commonly used jaw crusher has two kinds of double elbow plate and single elbow plate. The former is also called simple swing jaw crusher because it only makes simple arc swing when it works, while the latter also makes up and down motion when it makes arc swing, so it is also called complex swing jaw crusher.
In China, the technical level of jaw crusher manufacturers is very different. The products of some manufacturers are basically close to the world's advanced level, while the products of most manufacturers are far behind the world's advanced level. The long-term development direction of jaw crusher is to adopt welding frame. The main reason is that the jaw crusher frame accounts for a large proportion of the whole machine quality (casting frame accounts for 50%, welding frame accounts for 30%). The jaw crushers manufactured by many foreign manufacturers are all welded frames, and even the moving jaw also adopts the welding structure. There are many unreasonable cases in the domestic jaw crusher frame structure design, the main reason is that they are not arranged according to the actual stress of the crusher. In this case, the price of domestic Ezhou machinery is greatly reduced due to its quality level.
The ideal movement characteristic of moving jaw is the fundamental factor to ensure the ideal performance of jaw crusher. Therefore, the optimal design of jaw crusher mechanism is the fundamental method to ensure the ideal performance of crusher. This requires the designer to optimize the design of various specifications of crusher with the help of the mechanism optimization design module. Ideal dynamic jaw movement characteristics. The results show that the performance of crusher has been improved significantly after optimization design. But the optimization design of jaw crusher mechanism has not been widely used.
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