All kinds of crusher common failures and troubleshooting

All kinds of crusher common faults and eliminate 2019 - 11 - 09: the crusher in the mining industry is extremely important equipment, is the beginning of the whole process, therefore understand the common failures and solutions of all kinds of crusher is very important also. This paper mainly expounds the common faults of several kinds of crusher and elimination method, for everybody reference. Key words: crusher; Lubrication; Wear and tear; Speed 1. Jaw crusher common faults and expel the jaw crusher is through the fixed jaw and movable jaw plate between the volume change of broken ore material, broken way is through extrusion, bending, splitting the action such as broken ore material, usually used in coarse crushing, so the equipment failure is inevitable, here are several common faults and ruled out. Equipment at work, because of the large dust and bracket between head and bracket can't get good lubrication, is in a state of dry grinding, thus speeding up the wear them. Moving jaw while working at the same time by the joint action of bending, tensile and shear stress, have regular change load at the same time, make its by pulsating cycle load, in such a harsh conditions, moving jaw tooth plate wear will be very serious. Bracket head and bracket there are generally two kinds of structure forms, rolling and sliding, the radius of the bracket seat and the bracket of the difference of the spherical radius of the head, they are the greater the scroll area, conversely, the smaller the difference between them they roll the smaller area, when dimension is used for the sliding type, now generally adopt rolling, lubricating oil can be evenly distributed to the friction surface, lubrication condition is greatly improved. To prevent dust and fine particle content to aggravate wear, can be in upper junction and dust shield, reduce wear and tear. Bracket head and can be made combined the bracket body, when the bracket head wear only replace the bracket head, cost savings. Moving jaw board can choose better wear resistance of high manganese steel ZGMn17Cr2, improve its wearability, tooth board to produce a certain shape of tooth shape, can better guarantee the product particle size. Can be made two tooth plate, when the lower wear serious, can swap two plate, prolong the using time. Anyhow jaw crusher in using operations, must pay attention to regular maintenance and preventive maintenance. The correct operation and meticulous maintenance is to prolong the life of the machine and the important way to improve the equipment operation rate. In use should be regular maintenance, regular check, timely equipment parts found defective, repaired change in time, regularly check the lubrication system, added amount of grease. 2. Cone crusher common faults and eliminate coasters phenomenon of the working principle of cone crusher is the power from the shaft of the motor, bevel gear drives the eccentric sleeve rotation, with the rotation of the eccentric sleeve, moving cone with the center line of the vertex orbit crusher cone movement, when moving cone near the fixed cone, ore in the process of extrusion and broken, and left on cone cone on the other side, is the broken ore by gravity from the two at the bottom of the cone, cone motion not only rotate the center line of the crusher cone movement, but also around the center line of a rotation movement itself, so the dynamic cone motion is composed of relative motion and implicated, absolute rotation can make the products have even broken, reduce liner wear, but the revolution is unfavorable and exorbitant, generally 8 ~ 15 r/min, otherwise the coaster will happen. The main cause of speed has the following points: ( 1) The clearance between the main shaft lining and main shaft is too small; （ 2) High oil temperature rise caused by poor lubrication of friction, cause local to melt metals make the two contact surfaces relocated to produce holding shaft; （ 3) Because of the spherical bearing wear or other reasons cause dynamic cone sinking, make main shaft and bushing gap smaller. 3. Gyratory crusher common faults and troubleshooting of gyratory crusher both cone shape is steep, moving cone is stand, fixed cone is upside down, this is mainly in order to increase the need of the feeding size, gyratory crusher moving cone hanging on the cross beam, and the dynamic cone bearing on the spherical bearing of the cone crusher, gyratory crusher with the rise and fall of the moving cone, adjust the discharging mouth size and cone crusher by adjusting the taper ( Adjust the set) To control the height of discharging mouth size. （ 1) Cycle drop broken mobile cone crusher work, hydraulic system pressure there is A certain fluctuation, therefore the hydraulic cylinder piston loading by change, with the continuous running of equipment, seal failure, the hydraulic oil will be moved along the cylinder wall cracks, the piston is shown in figure consists of two parts, A and B, because of the clearance fit between them, therefore the hydraulic oil pressure B, can be separated from A, B will return oil port congestion, so the moving cone is not falling. Solution is to lift the moving cone, demolition of hydraulic cylinder for inspection, replacement of seals, now there is A kind of method is in B cylindrical bevel cutting, A and B will be welded together, can solve this problem. （ 2) Other common fault conclusion based on the common faults and processing methods for several kinds of commonly used crusher, constantly applied in production practice and improvement, also provides some Suggestions for the design of the crusher modification. References [ 1] Qin Bangxian. Design and production of new technology new technology and new crusher fault diagnosis and quality inspection standards and practical manual exclude [ M] 。 China machine press, 2009. ( 2] LangBaoXian LangShiPing. Crusher [ M] 。 Metallurgical industry press, 2008.