Crusher Description and working principle

Impact Crusher is a new, highly efficient impact crusher, hammer crusher is developed on the basis of. In the cement industry has been widely used. It is mainly used for

limestone, sandstone, coal and clinker etc. hard and soft rock for coarse crushing, breaking and crushing process.

A) Impact Crusher works

Crusher Although many forms, but its working principle, performance and structural designs, which also has crushing equipment a lot in common. Crusher's working parts with a hammer two high-speed

rotation of the rotor 1. Feed material inside the block, the rotor rotation range (ie hammering area) by plate hammer, and was thrown back plate 3 high speed, once again under

attack, and then from the back plate to plate hammer rebound, continue to repeat the above process . And from the way, are there any material strike against each role. As the

material by plate hammer blow, and the back plate and the materials between the impact of the collision. Material constantly cracks, loose and crushed. When the particle size is

smaller than the back plate and the gap between the plate hammer, they were discharged.

Two) crusher crushing effect on the material, there are three main aspects:

1) Crushing Freedom

The material into the crushing chamber, immediately subject to the impact of high-speed hammer and materials between the collision, while the plate hammer and the material and

the friction between the material, so that the crushing cavity material being crushed.

2) rebound broken

As high-speed rotation of the rotor plate hammer, allowing materials to obtain a high velocity, and then hit the back plate, so that the material can be further broken.

3) grinding broken

After the two crushing effect is not broken, is greater than the size of the material discharge port at the discharge port at the high-speed rotation of the hammer grinding and

crushing.

Crusher and hammer crusher comparison between works similarly, are based on impact crushing way, but the structure and work processes vary. The main difference is: crusher plate

hammer engaged into the material from the bottom up, and throw it back to the top of the board.

Three) crusher advantages and disadvantages

1) Impact crusher impact crusher full play the role, so that the material subjected to high-speed, repeatedly blow back and hit each other after the impact, the material along

the weak part of the selective crushing, so it's high crushing efficiency , low power consumption.

2) adaptability, especially in brittle materials such as limestone is more appropriate.

3) crushing ratio, usually 20 or so high up 50-60, you can reduce the number of broken segments, simplifying the production process, save and invest.

4) The structure is simple, easy to manufacture. No significant work unbalance vibration, convenient maintenance and repair operations.

2) Disadvantages

(A) hammer and impact plate wear faster. Especially in crushing hard materials, wear faster and generally should not be used.

(2) attempts to prevent poor performance, suitable for crushing plastic and viscous materials.

(3) The operation noise, dust generated is large.

Four) crusher structure

Single rotor impact crusher

Single rotor impact crusher structure, material blocks from the inlet feed, in order to prevent material blocks when broken flying in the direction of feed inlet is equipped

with chain curtain. Feed of the material block falls above the grate, a small slit gob fall through the grate in the lower part of the chassis, large pieces of material slide

along the screen surface on the rotor. The circumference of the rotor fixedly attached to a certain height hammer rotor from the motor through V-belt drive for the high-speed

rotation. Falls above the rotor speed rotation of the feed block by the impact of the board hammer, access high kinetic energy after the collision to the back plate, then bounce

back and from the back panel, and the same in the crushing zone thrown by the rotor material to collide. By the bar screen, rotor, back plate and chain curtain composed of space

known as the first impact area; from the back plate and the rotor space formed between the second impact zone. Materials in the first impact zone by crushing impact each other,

and then again into the second impact zone crushed by the impact again. The crushed materials are lower casing unloading spout.

One end of the back plate with live chain hanging on the chassis, the other end of the adjusting screw to a fixed position. When the bulk material or hard objects caught in the

rotor and crushed between the back plate gap, leaving the back plate subject to greater pressure counterattack after the shift, the gap increases, allowing debris difficult to

pass without causing damage to the rotor. Then back plate under its own weight, but also to restore the original position, as a Linear vibrating screen protection device.

Five) major components

1) back plate

Counterattack board's role is to withstand hammering out the plate material impact, so that the material and broken by the impact, and the impact of the material after crushing

impact zone bounce back, again to achieve the desired impact crusher product size.

Back plate in the form of a lot, mainly Mansard and arc-shaped categories. Mansard back surface enables various points on the back plate of the material is approximately

perpendicular to the direction of impact, so get the best crushing effect. Arc-shaped counter surface material can block out from the back plate to rebound after the district in

the center of a circle formed intense impact grinding zone, in order to increase the freedom of the material impact crushing effect.

Back plate steel welded into general use. Its back surface with wear-resistant liner, but it can also be counter-roll or grate plates. Seam counterattack with grate surface, and

its content is less fine-grained level products, equipment, production capacity can be increased, power consumption province. But there are complex, difficult to replace worn

counter surface, wear faster and other defects.

Crusher rotor mostly using whole cast steel structure, durable, easy to install board hammer, and its large mass, to meet crushing requirements. Small and light crusher rotor

also can be welded steel plate.

2) hammer

The shape of the fastening plate hammer manner and is closely related to the work load. Hammer should be designed to meet reliable, easy handling and improved plate hammer metal

utilization requirements. Board hammer generally use high chromium cast iron, high manganese steel and other wear-resistant alloy steel. Board hammer shape many, elongated, T-

shaped, S-shaped, workers shaped, ax-shaped and other shapes with a trough, now generally elongated.

Six) crusher operation and maintenance points

Impact crusher is a kind of high speed inertia broken machinery, to ensure it is working properly and safe operation, the operator must be in strict accordance with the rules of

the provisions of operation and maintenance of the equipment to do the work.

b) the device before driving to strict inspections. The bolts are loose fasteners, easy to wear pieces are worn too large, identify problems and timely solutions. In normal

operation the device should be checked each time the sound parts, temperature, vibration and so on.

c) shall be in accordance with the car crushing equipment in the system startup drive sequence. It should be required when parking parking parking order.

d) In normal operation, you should always check the lubrication system work. Regularly add new grease and oil changed regularly. Rotor bearing temperature, normally should not

exceed 60 ℃, should not exceed 75 ℃. If the temperature rise over this limit should immediately stop checks, take effective measures to deal with.

e) feeding should be uniform, to prevent exceeding the prescribed chunks of material and non-broken material into the machine. If found to be not a normal phenomenon (abnormal

vibration and noise), you should stop and check, to identify causes and troubleshooting only after driving.

f) After the plate hammer wear should be timely replacement. Exchange must be weighed against the new board hammer selection, Wu Shi rotor has better static balance.

g) protective casing wall tree plate, back plate and bolts and other serious wear and tear should be promptly replaced. Prevent the liner and the back plate off causing serious

accidents.

h) Impact Crusher has a strong impact on the operation of the role of dust generated is large, so the crusher should be tightly sealed and well ventilated vacuuming.

i) back plate and the gap between the size of the board hammer, a great influence on the particle size, should be to keep it within the specified range, and according to the

nature of the material and the product size requirements make the appropriate adjustments.