Selection of broken machinery

Users in the purchase of broken machinery, it is often confused for a large number of broken machinery do not know how to choose, this article on the classification of broken

machinery and common type coal screening machine introduction: the selection of one of the broken machinery

First, the classification of broken machinery and Scope
(A), the material crushing methods
Although many types of broken machinery, but in different ways by force, the materials are crushed crush, bend, impact, cutting and grinding methods. In the crushing machine,

the force situation is very complicated, often of several force exist, of course, is also a crusher station one or two main

Force.

As the material is irregular particle shape, and the different physical properties of materials, so the use of different methods of crushing, crushing the material by the use of

mechanical external force is applied there are several different ways.
1 crushed the material is placed between two face, applying pressure, the material reaches its compressive strength due to stress and broken, this method is generally suitable

for crushing bulk materials.
2 chipping the material as a flat and a job with a sharp edge between the plane, with a sharp edge when working on the material plane extrusion, the material along the direction

of the line splitting pressure. Splitting is due to the cleavage plane of the tensile stress reaches or exceeds the tensile strength limit of the material.

Ultimate tensile strength of the material smaller than the ultimate strength.
3 fold Linear vibrating screen material and broken by bending stress. Material to be broken to withstand concentrated loads of two or more pivot fulcrum Charpy beam bending stress when the

material reaches the bending strength of the material, he incurs a broken broken.

4 material impact crusher and broken by the impact force, the crushing force of its instantaneous effect, and its high crushing efficiency, crushing ratio, energy consumption,

impact crusher has the following situations:
(A) the work of the body movement of the material impact;
(2) high-speed movement of the material impact to the fixed face;
(3) tell the movement of materials collide;
(4) the work of the body to high-speed movement of material floating shock.

5 grinding (grinding) materials and movement between the surface of the work by a certain degree of pressure and shear stress, its shear stress reaches the ultimate shear

strength of the material, the material will be crushed; or friction between materials cut, leaving the role of grinding material crushed.


(Two) the classification of broken machinery
1 type crusher
Press the structure and working principle of different commonly used crushing machinery are subject to the following types.
(1) jaw crusher (broken jaw) is to rely on the role of cyclical movable jaw plate reciprocating motion, put into two jaw crushed material between the plates.
(2) hammer crusher (hammer broken) materials by high-speed rotation of the hammer impact and at high speed to the material itself, the impact of the fixed liner material

crushing.
(3) cone crusher (cone crusher) by eccentric rotation of the inner cone, so that the material in between two cones is bent and crushed and broken.
(4) Impact Crusher (Crusher) material by the high velocity hammer blow, so that the material to the back plate high-speed impact, and the clash between materials and grinding.
(5) roll crusher (roller-breaking) the material falls on two parallel and opposite rotation between rollers (opposite rotation), the material in the friction roller surface

under the effect of being pulled between the rollers, the rollers being The crushed and broken.
 Another point worth noting is that the crushing ratio and unit power consumption (energy per unit mass of crushed product consumption) is the basic crusher technical and

economic indicators. Unit power consumption in order to identify whether the broken machinery of power consumption economy, crushing ratio used to describe the characteristics

of the grinding process and

Identification grinding quality, the two crusher unit power consumption even if the same, but the crushing ratio is different, the two crushing machine is not the same economic

effect. In general, the crushing ratio of mechanical work efficiency. Therefore, to identify broken machinery's efficiency, should also be considered

Its unit power consumption and crushing ratio size.