The working parameters of extrusion type crusher affect the crusher motion characteristics, and the crusher motion characteristics affect the way of bulk material passing in the crushing cavity, which in turn affects the working performance of the crusher, so it is necessary to analyze the working motion characteristics of extrusion type crusher. This paper takes cone crusher as an example to analyze the working motion characteristics of the crusher.

Cone crusher is a very widely used crusher in mineral processing plant, and plays an important role in mineral processing operations. Cone crusher generally consists of six major parts: frame, eccentric shaft sleeve, spherical bearing, dynamic cone and adjusting ring.

The crusher's moving cone parts rotate around the centerline of the crusher with the suspension point as a fixed point, and the crushing wall is constantly close to and far away from the rolling molar wall, so the bulk materials in the crushing chamber are constantly crushed by the extrusion of the crushing wall and the rolling molar wall. In addition, the cone parts also because of the friction between the crushing wall and the bulk material and produce low-speed rotation, so that the bulk material in the crushing cavity by grinding and crushing, but the role of the role of the smaller and therefore can be ignored. Therefore, the motion of the working parts of the cone crusher can also be regarded as the rigid body motion around the fixed point.

The motion characteristics of the cone crusher directly affects the motion characteristics of the bulk material, the study of which is to study the motion characteristics of each point in the crushing cavity. Take any point in the crushing cavity as the research object, and analyze the motion characteristics of this point in the crusher working process. The moving cone part can be regarded as a rigid body movement around a fixed point (suspension point), so the moving cone part not only rotates and swings around the suspension point, but also rotates around its own centerline. As the rotational speed of the cone is very low, generally 10-15 rpm, which has little effect on the movement characteristics of the bulk material, the motion characteristics of the cone crusher can be ignored in the study, and it is considered that the cone parts only do the rotary pendulum motion around the suspension point. Therefore, the movement of the fixed point on the crushing wall is also the rotary pendulum movement around the suspension point, so as to realize the extrusion and crushing of bulk materials in the crushing cavity.