The crushing cavity of the Gravel Sand Crusher is a key part affecting the main technical indicators of the crusher. Different size crushers have different cavity sizes. Although there are many types of cavities, they can be summarized into two types in general: one is the steep cone cavity type of hydraulic cone crusher, and the other is the flat cone cavity type of Simmons and rotary disc crusher. . For flat conical cavity, if the distance between the upper cavity of the crushing cavity and the top is increased, and the average diameter of the material compression layer is reduced, the processing capacity of the crusher will increase, thereby forming a thick material layer and increasing the volume of the upper cavity. ， Enlarge the size of the feeding port, and then match the above-mentioned good mechanical parameters, you can form a cavity with a steep tapered cavity. The characteristics of this cavity are: the crushing cavity is deep, the parallel area is long, and the bottom angle of the moving cone Very large, so called steep cone crusher. Its upper cavity has a smaller volume and a smaller feed port size, and there is no sudden change in the cross section of the upper cavity and the entrance of the parallel zone. For the two different cavity types of flat cone cavity type and steep cone cavity type, they must be equipped with different mechanical state parameters. The former has a larger eccentricity, a higher eccentric shaft speed, a constant discharge opening size, and a lower driving power. The latter has a smaller eccentric distance, a lower eccentric shaft rotation speed, a discharge port control within a certain range, and a large driving power, so it is called a high-energy crusher. Therefore, when designing the crushing cavity, the crushing effect between the layers should be brought into full play, so that the material from the feed port to the discharge port will suffer more times of crushing. Regardless of the cavity type, you should try to feed uniformly to ensure uniform wear of the liner.