Jaw crusher because of simple structure, convenient operation, broken than large, widely used in mining, smelting, road, rail and so on all walks of life.
1. The specification and classification
The specifications of the jaw crusher in feed mouth width and length. For example: the feed mouth width is 600 millimeter, length of 900 mm of jaw crusher is 600 x 900 jaw crusher.
Jaw crusher are generally classified according to the feeding mouth width, the feeding mouth width is greater than 600 mm for large hubei; Feed mouth width for medium-sized hubei in 300-600 – mm; Feed with 300 mm for small e broken.
2. The working principle and types
When the material into the jaw crusher in the crushing cavity (composed of fixed jaw plate and moving jaw plate space), the moving jaw make periodic reciprocating swing, when moving jaw near the fixed jaw plate, material is extruded, split and broken effect and broken. When moving jaw away from fixed jaw plate, were broken to less than the material discharging mouth, according to the gravity from the lower row ore mouth eduction. Has not been completely broken material, after falling into the crushing chamber bottom role in squeezed, splitting, broken is broken again.
Jaw crusher type very much, but in our country, the mill USES only two: simple oscillating jaw crusher (PEJ) and complex oscillating jaw crusher (PEF), pinyin P said crusher, jaw crusher, E said F complex swing, J said simply.
3. The jaw crusher is easy to wear parts replacement matters needing attention
Replace the liner
Fixed jaw plate of jaw crusher (tooth plate), moving jaw plate (tooth plate), on both sides of the plate (guard) the most easy to wear and tear. Wear serious words will lead to the product particle size bigger. When early liner wear plate can be turned to use, or two pieces of turning up and down. Hubei plate wear and tear, in the more concentrated in the part when the toothed plate wear off 3/5, need to change a new lining board. When the liner wear off 2/5 on both sides, also need to change new one.
Replace the spindle, eccentric shaft, bearing
Axis wear if not much, just want to fix the geometry and can get on the lathe turning, but when after several times of turning the shaft neck size is reduced to 5%, no turning again, should change new. Because of the jaw crusher is working under impact load, so the babbitt lining on the bearing, you need to cast every two years. If the eccentric shaft and bearing, spindle and bearing is wear, the tip clearance is greater than 1.5 times of the original assembly clearance, need to add cushion adjustment or replacement; Oil groove wear 1.5 mm, should restart oil groove and adjustment. Connecting rod head cover and the space between the eccentric shaft, wear to greater than 1.5 times of assembly clearance, also need a padded adjust or replace new one.
Replace the thrust plate
When worn thrust plate or thrust plate before the break, must first to rid of ore crushing cavity, worn out or broken thrust plate, check the movement of hubei and the bracket on the connecting rod is damaged. Then pull the moving jaw near the fixed jaw and the bracket of the work surface with dry oil lubrication, change new thrust plate, make it work with bracket surface contact, slowly and taut horizontal tie, make the moving jaw thrust powder to live. Tight security cover, connected lubrication system, and then adjust the row ore mouth size.
Common sense about the jaw crusher is mainly above these, the last is important to emphasize for jaw crusher, are more diligent in the usual maintenance, this machine than the cost of replacement parts.