The movement mechanism of the crushing cone of the cone crusher
The working mechanism of the cone crusher is composed of the crushing cone and the fixed cone. When the equipment is running, the materials in the crusher are crushed due to the proximity and separation of the crushing cone and the fixed cone. , and discharge the crushing cavity under the action of its own weight. The crushing cone of the new cone crusher is supported on the spherical bearing bush at the upper end of the fixed main shaft, and its movement is driven by the eccentric bushing. The motion mechanism of the moving cone will be analyzed in detail below.
The axis of the crushing cone intersects with the center line of the machine at the same fixed point, and the angle between them is the precession angle. When the crusher is running, the axis of the crushing cone makes a conical motion relative to the center line of the machine, and the top of the cone is the spherical support center. This point always remains stationary during the movement of the crushing cone, so the movement of the crushing cone can be regarded as a rigid body orbiting. Fixed point rotation. Since the crushing cone is driven by the eccentric sleeve, the crushing cone not only rotates with the eccentric sleeve around the center line of the machine, but also rotates around its own axis. Therefore, the movement of the crushing cone is composed of two rotational movements. The crushing cone rotates around the center line of the machine, which is precession motion or implicated motion. The crushing cone rotates around its own axis, which is rotational motion or relative motion. This complex motion of the breaker cone is called regular precession.
The movement of the crushing cone is directly driven by the eccentric bushing and makes a swing motion around a fixed point in space. Since the center of mass of the crushing cone and the eccentric sleeve is not on its center of rotation, inertia force and inertia moment about the fixed point will inevitably be generated during movement. When crushing materials, since the crushing force is much greater than the inertial force of the crushing cone and eccentric bushing, it does not show its harm. However, when no-load or in the process of no-load transition to crushing materials, this inertial force and inertia moment When acting on the frame, it is a periodic dynamic load, which causes vibration of the frame and deflection of the eccentric bushing, seriously affecting the normal operation of the crusher. Therefore, it is necessary to determine the magnitude and direction of the inertial force and moment of inertia generated, and take measures to eliminate their harmful effects.
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