This type of stone crusher has the ability to crush large stones that are larger than 40 cm by applying pressure between two plates or jaws. These crushers are always exposed to erosion due to constantly dealing with all kinds of coarse stones that are considered input. Therefore, they are usually made of manganese steel and have high resistance to this problem. This machine has a capacity equal to 6 thousand tons per hour and the angle between two jaws in this type of machine is between 26 and 27 degrees. The size and model of all types of jaw crushers are also determined according to the dimensions of its opening, for example, if the model of this stone crusher is 100 x 200, it means that the entrance opening is 100 x 200 cm.
Jaws
The jaw crusher, which is one of the most common and widely used crushers, is made in two ways: single arm and double arm:
Single -arm crusher
In this type of stone crushers, its mobile jaw moves at a very low speed in four opposite directions: up, down, forward and backward. The pressure applied to the stones in this crusher is less and their entrance opening is smaller, so it is suitable for crushing hard stones. The single-arm jaw crusher is lighter, simpler and cheaper compared to the two-arm type, but it is not economical for abrasive and very hard stones.
Jawbone
In this type of stone crushers, the movement of the movable jaw is only in two directions, forward and backward, but the pressure between the jaws is more than the single-arm type. Their entrance opening is bigger and they are used to crush very hard stones. Of course, compared to the single-arm type, they are heavier and their use involves more costs. Of course, in another category, these stone crushers are classified according to their size, which, of course, you should pay attention to this type of classification when buying, so that you can buy a stone crusher that fits the weight and size of the stones you want.
Different components of jaw crusher
This stone crusher, like any type of industrial equipment and devices, consists of different parts, which are used in harmony with each other to crush stone. The most important parts of a jaw crusher are:
Load output bottleneck
body
fixed jaw
cargo inlet
movable jaw
paid shaft
Togol
Togol's back spring
How the jaw crusher works
Jaw crushers are differentiated into several types in terms of how the jaws move relative to each other:
blake
dodge
fixed middle (universal)
The driving force of the electric motor is transferred to the flywheel through the belt and causes the shoulder of the movable jaw to move towards the shoulder of the fixed jaw with periodic movement and in this process the stones are crushed, then the movable jaw rotates through the crank shaft and pulls the rod. The rod is separated from the fixed jaw and finally the crushed stones are discharged. In the construction, jaw parts including: Mardon bolts and nuts, bearing screws, jaw shoulder restraint screws and special steel rods are used to have a long life in heavy loads. The belt of the jaw crusher is made of ST52 wear-resistant steel, which has more strength and longevity than the belt of ordinary belts. The trunnion of this device is cast from carbon steel and forged trunnions are not used in it. The size of the jaw is determined by the dimensions of the rectangle above it, and crushing is done between the jaws by pressing and hitting the stones.
The use of jaw crusher
The jaw crusher is used for crushing large stones (up to 40 square centimeters). A jaw crusher is placed at the beginning of the mineral stone crushing line or sand production in order to crush large stones and prepare feed for other machines in the rest of the line. The size of this device is determined according to the scale of the incoming stone. It is usually used in mines with very hard rocks, such as riverbeds. The crushing of mineral stones at the beginning of the line or the production of sand in order to crush large stones and provide feed for other machines in the continuation of the line and its other application in mines with very hard stones, such as river beds, are considered among the applications of jaw crusher. These crushers are designed in a special way due to being exposed to wear; Also, the parts in contact with the stone in this device are made of quality steel, among them manganese steel and molybdenum manganese steel. This increases the life of the parts and reduces the depreciation caused by the operation of the device. This device has two smooth or wavy plates (jaws) which are a fixed jaw and a movable jaw, and the stones are compressed and crushed by the compressive or shearing forces between the two jaws.
Features
Typically, the important parts of the jaw crusher, such as the shoulder and collar, which may be subject to wear, are made of manganese steel. Its strong and resistant building has made it more useful. The output opening of this device can be adjusted. By using the lubrication system of this device, its efficiency will increase and as a result, its maintenance cost will be much lower. In case of problems in the parts, it is possible to replace them quickly by installing spare parts of the jaw crusher. For this reason, its placement at the beginning of the production line for extracting stone from the heart of the mountain plays a big role in the quality of sand and gravel produced. By using compressive and shearing force, the crushing of stones is done using a jaw crusher. High power and capacity in crushing stones The shoulder of the jaw, the shoulder straps and other wearing parts are made of manganese steel Strong construction and high resistance One-hand output load Ability to adjust the outlet opening Beautiful design and reliable performance Quick and easy replacement of spare parts High efficiency and reduced maintenance cost with lubrication system
Another feature of the jaw crusher is the use of a fixed and movable jaw. An eccentric shaft connected to the crusher motor drives the movable jaw. The compressive, impact or shearing force with the movement of the jaw causes the stone to crumble, and there is a gap between the two jaws in the upper and lower parts, which are called the opening and the throat, respectively. High power is another feature of this device. Also, its high capacity in stone crushing can be considered as an advantage for it.