The ore crushing function of the medium-fine cone crusher is basically the same as that of the gyratory crusher. It also uses the working surface between the movable cone and the immovable cone for ore crushing. The movable cone is supported on a spherical bearing and fixed on a suspended vertical shaft. The vertical shaft is placed in an eccentric sleeve, and the eccentric sleeve is placed on a thrust bearing.

 

The movable cone and the vertical shaft are driven by the eccentric sleeve. The eccentric sleeve is driven by the horizontal shaft and pulley and through bevel gears. The pulley is driven by the motor through a triangular belt. The lower part of the vertical shaft is installed in the eccentric sleeve. When the eccentric sleeve rotates, a conical surface is drawn by the shaft. Therefore, when the movable cone approaches the immovable cone, the ore is crushed. The casing is composed of upper and lower parts and is connected by bolts. There is a strong spring sleeved on the bolt. The function of the spring is to prevent damage to the crusher (such as the main shaft, etc.) when metal or other hard objects fall into the crushing cavity. If there are metal blocks or other hard objects (nuts, drill bits, etc.) entering the crushing cavity together with the ore, the immovable cone will be lifted and the discharge port will be enlarged so that it can be discharged. Sometimes the cone crusher uses an oil pressure (or water pressure) device to adjust the size of the discharge port.

 

Ore falls into the machine through the feed opening via the distribution plate. The distribution plate is installed at the upper end of the vertical shaft. Due to the rotation of the vertical shaft, it obtains vibration and distributes the ore evenly around the cone. With the help of the hinged rod and hinge with a handle, the immovable cone can be raised or lowered to adjust the width of the discharge opening. All components are made of cast steel. The working surfaces of the movable cone and the immovable cone are lined with manganese steel liners to protect the cone from wear. After the liners are worn, they can be replaced. When replacing, molten lead is poured between the liner and the conical surface to make them closely bonded.

 

The fine cone crusher, also called the short-head cone crusher, or "round mill". Its structure is basically the same as that of the medium-fine cone crusher. The difference lies only in the different shapes of the movable cone and the immovable cone. The movable cone and the immovable cone of the short-head cone crusher are relatively short, and the parallel belt between the two cones is relatively long. The feed opening and discharge opening are relatively small, so a finer product (5-10 millimeters) can be obtained.

 

In addition to the standard and short-head cone crushers, there is also a medium-sized cone crusher between the two. It can be used for both medium crushing and fine crushing. The main difference among standard, medium-sized, and short-head cone crushers is the different cross-sectional shapes of the crushing cavity. Therefore, the feed particle size and discharge particle size are also different.

 

The gyratory crusher is used for coarse crushing, the standard cone crusher is used for medium crushing, and the short-head cone crusher is used for fine crushing. The specifications of medium and fine crushing cone crushers are represented by the diameter D at the bottom of the movable cone.