Failures Analysis

When the vibrating screen is in the normal working status, if the rotation is slow and the bearing has a high temperature, which show that the work of usual maintenance needs improving and the lubricants are needed. Routine maintenance is also very important. If the lubricant on the bearing is newly added, the problem maybe lies in the poor quality of the lubricants or adding too much on the bearing lubricants. The lubricant with poor quality will block the bearing and labyrinth seal. Therefore, the quality of lubricants is critical. The reasons for the poor screening quality may be the improper use or the blocking of the mesh. The increase of the fine-coarse-grained materials and moisture will result in that the material layer is too thick and the feeding is uneven.

As for the vibrating screen itself, the both sides of the sieve is not tight. If there is much noise in the screening process, the reasons maybe include that the bearing is damaged, the bolts loose, the breaks and the spring is damaged crossbeam. In addition to the bolt that can be tightened, the parts should be replaced in other three conditions. In view of the above failures, we can reduce the failure rate through routine maintenance. Before the starting up of the machine, checking the oil level of both sides. If the oil level is too high, which will lead to problems or the temperature of exciter rise operation; If the oil level is too low, which will cause the bearings to be prematurely damaged. Checking all bolts to ensure that all of them are tightened and after working for eight hours, re-tighten them.

Checking the tension of the V-belt to prevent slip at the start or work. Making sure the minimum clearance between all moving parts and fixtures. The feeding can not be conducted until the sieve is running smoothly to make sure the sieve works without load and before stopping the machine, it is necessary to clean the materials on the sieve surface. In short, summarizing the failures of mine vibrating screen is to prevent and reduce the occurrence of the failure. If the failure emerged, we can timely settle them to minimize the impact on production. Rock crusher cone: ball mill:


A slope is a portion of land that presents an inclination that can assume a situation of instability after an original profile has been modified with artificial relevant interventions that have been able to modify the initial equilibrium conditions. The equilibrium equations and the constitutive equations that describe the ideal behavior of the land are used for the study of the stability of slopes. The grounds are multiphase systems which makes the equations of equilibrium of great complexity, so we must introduce simplified assumptions. The constitutive laws of soil implificadas are applied to a perfectly plastic rigid model. We accept the hypothesis that soil resistance is function of cohesion and the angle of internal friction, characteristic of the plastic State, to give validity to the criterion of Mohr-Coulomb break. The method of balance limit (LEM) studied the equilibrium of a rigid body (talus) on a sliding surface. Assuming that the balance was met compares the tensions of cutting with the maximum allowable voltage, valued by the breakage of Coulomb criterion. Some of the final balance, as the major methods, consider the overall balance of rigid body. Others, when there is a lack of homogeneity, divide the body into slices whereas the balance of each, as Bishop, Janbu or Fellenius methods. The method of slices for the study of the stability of a slope is a method of last balance that divides the mass of land susceptible to slipping into slices. Original author and source of the article