Jaw crusher is a kind of primary crushing equipment in the mining industry, which plays a very important role in the production line. Jaw crushers can crush large chunks of hard material such as quartz, bluestone, pebbles, limestone, iron ore and more. Because of its reliable operation, simple operation and convenient maintenance, it is a very popular crushing machine. At the same time, the double toggle jaw crusher is also a kind of jaw crusher. This article mainly introduces of the double toggle jaw crusher working principle.
Working principle of jaw crusher
The jaw crusher is a traditional crusher with a simple structure. It is mainly composed of two jaw plates, the movable jaw and the fixed jaw, which simulate the movement of the two jaws of animals to complete the material crushing work. It is widely used in the crushing of various ores and bulk materials in mining smelting, building materials, roads, railways, water conservancy and chemical industries.
The working principle of the jaw crusher is a curved extrusion type, and its working principle is to simulate the movement of the two jaws of animals. When working, the motor drives the belt and pulley through the eccentric shaft to move the movable jaw up and down. When the movable jaw rises, the angle between the toggle plate and the movable jaw becomes larger, so that the movable jaw is pushed close to the fixed jaw, and the materials are crushed many times through the extrusion, friction and grinding between the two jaws.
When the movable jaw is lowered, the angle between the toggle plate and the movable jaw becomes smaller, and the movable jaw leaves the fixed jaw under the action of the pull rod and the spring, and the crushed materials are discharged freely through the discharge port at the lower part of the crushing chamber under the action of gravity . With the continuous rotation of the single machine, the movable jaw periodically crushes and discharges materials to achieve mass production.
Commonly used jaw crushers have two types: double toggle plate and single toggle plate. The former only makes a simple arc swing during work, so it is also called a simple swing jaw crusher; It moves up and down, so it is also called complex swing jaw crusher.
Single toggle jaw crusher working principle
The upper end of the movable jaw is directly suspended on the eccentric shaft, which is directly driven by the eccentricity of the eccentric shaft as the connecting rod of the crank linkage mechanism, and the lower end of the movable jaw is supported on the rear wall of the frame by hinged thrust plate.
When the eccentric shaft rotates, the movement trajectory of each point on the movable jaw is from the circumference line of the suspension point (radius equal to the eccentric distance), and gradually turns downward into an ellipse. The connection point trajectory is a circular arc. Because the trajectory of each point on the movable jaw in this machine is relatively complicated, it is called a complex swing jaw crusher.
Compared with the simple pendulum type, the compound pendulum jaw crusher has the following advantages: lighter weight, fewer components, more compact structure, better filling degree in the crushing cavity, and uniform crushing of the loaded material blocks. Compulsory discharge of finished products, so the productivity is higher, which is 20% to 30% higher than that of the simple pendulum jaw crusher of the same specification; the material block has a large up and down movement at the lower part of the movable jaw , it is easy to produce cube-shaped materials.
Double toggle jaw crusher working principle
The movable jaw is suspended on the eccentric shaft and can swing left and right. When the eccentric shaft rotates, the connecting rod reciprocates up and down, driving the two thrust plates to reciprocate, thereby pushing the movable jaw to reciprocate left and right to realize crushing and discharging.
Double toggle jaw crusher working principle adopts the crank double-link mechanism. Although the movable jaw is subjected to a large crushing reaction force, the force on the eccentric shaft and the connecting rod is not large, so it is mostly used in industry to make Large and medium-sized jaw crushers are used to crush hard materials.
In addition, when this double-toggle jaw crusher works, the trajectory of each point on the movable jaw is a circular arc centered on the eccentric shaft. The radius of the arc is equal to the distance from the point to the axis. The arc of the lower end is large, and because of the simple movement track, it is called a simple swing jaw crusher.
Double toggle jaw crusher working principle has a compact and simple structure, and the transmission parts such as the eccentric shaft are less stressed; due to the small vertical displacement of the movable jaw, there is less excessive crushing of materials during processing, and the wear of the movable jaw plate is relatively small.
This is the full introduction of the double toggle jaw crusher working principle adopts the crank double-link mechanism in this article. I don’t know if everyone is clear about the double toggle jaw crusher working principle. If there are still some questions that are not clear, you can read them below the article Leave a comment and we will reply to everyone’s comments one by one. At the same time, there are other excellent articles on our website. You are welcome to continue browsing on our website.