Moving Cone Assembly HP300

Moving Cone Assembly HP300

Cone Crushers 

Above figure shows construction of a typical Cone Crusher. Cone crushers are used in secondary, tertiary and quaternary stages. They are compression crushers. A cone crusher is similar in operation to a gyratory crusher, with less steepness in the crushing chamber and more of a parallel crushing zone. A cone crusher breaks material by squeezing it between an eccentrically gyrating main shaft, which is covered by a wear resistant mantle and the concave hopper, covered by bowl liner (concave). As material enters the top of the cone crusher, it becomes wedged and squeezed between the mantle and the bowl liner. Large pieces of the material are broken and then they fall to a lower position (because they are now smaller) where they are broken again. This process continues until the pieces are small enough to fall through the narrow opening at the bottom of the crusher. The spring or hydraulic release system (not shown in above figure) of a cone crusher acts as an overload protection that allows tramp iron to pass through the crushing chamber without damaging the crusher. For automation, many manufacturers provide modern features such as hydraulic mechanism for setting adjustment. These automation systems constantly adjust the CSS (Closed Side Setting) with no need to shut the machine down. They compensate for variations in feed material and wear in wear parts. They are also used for cavity clearing (if the machine stops during operation under load due to electric failure, etc.). Wear parts, mantle and bowl liner are made of manganese steel. The performance of wear parts depends on the feed arrangement, speed, stroke and closed side setting (CSS) of the crusher. Trickle feed results in irregular liner wear. As shown in the following figure, choke feeding is the correct method for uniform liner wear..

The eccentric sleeve part of the cone crusher is composed of main parts such as eccentric sleeve, thrust bearing, large gear and gear counterweight. The role of the eccentric sleeve cannot be underestimated! The eccentric sleeve is often installed at the bearing hole. When the gear or housing has machining and assembly errors, the backlash between the two gears can be adjusted by rotating the eccentric sleeve, which can eliminate tooth thickness deviation, center distance deviation and common normal deviation. The introduction of the eccentric sleeve not only reduces the position accuracy of the casing hole system and the processing requirements of the gear helix angle accuracy. The eccentric sleeve of the cone crusher is usually made of lead bronze.