The idler is one of the important conveyor components. The interaction of idler and belt leads to the bending vibration of idler set. This vibration will increase the abrasion degree of belt and idler, especially for the idler bearing. In this way, the reliability of belt conveyor will be reduced. The manufacturer should consider this problem. If the swing of lateral oscillation is large, the running resistance of belt conveyor will increase greatly, with other problems such as materials escape, high noise, belt alignment , small frictional traction and abnormal running of the belt conveyor.
In the design of conveyor components, the diameter of idler influences its rotation speed. Because of nonuniform idler materials and working accuracy, the idler has some eccentricity. Then there will be longitudinal vibration when the idler rotates. If the forced frequency is close to the vibrational frequency of belt, the resonance occurs, influencing the normal running of belt conveyor. In the dynamic analysis, the users should consider the dynamic relation between belt and idler(conveyor components). This should include two aspects. One is natural vibration and the other is the materials stability. The idler is one of the most important components of belt conveyor. The space between idlers is set from the service life and belt bending in static design. The interaction of idler and belt should be considered in dynamic design. A good belt conveyor design could help to reduce the investment costs. In most cases, the belt conveyor and stacker reclaimer are coordinated to complete one project. So the performance of belt conveyor and stacker reclaimer determines the quality of the project.
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The number of mining manufacturers is increasing year by year in recent years, resulting in the violent competitive situation. Many experts predict that the mining equipment will develop in the following directions. Environment protection: The principle of low consumption and light weight is adopted by many designers. In the course of production, some harmful materials would be avoided. Some parts could be recycled as fuels. Large scale machines: For example, the volume of ball mill is 5-8 times larger than that last ten years and the volume of autogenous mill is 15-20 times larger than before. At present, there is a lot purchasing information for large-scale mining equipment, showing the demand situation of the market. Automation: The instrumentation and sensor for monitoring feeding capacity, pulp density or other measure parameters have been prepared basically. The difficulty is grade detection of various materials. Optimization design: The advanced technology should be applied in the mining equipment such as computer technology, electrical control technology. In this way, the equipment would have good performances such as stable operating, precise processing, simple operation for users, and low noise. Good adaptability: Some super hard materials also could be handling by the equipment such as sand, slag, clinker, quartzite and fluorite. Besides, the handling of construction waste should be considered also. So in the future, the stacker reclaimer, reclaimer,belt conveyor, screw feeder or other mining equipment will be more advanced and environment friendly. This is the trend for many EPC companies. Large machinery's detailed measures on preventing strong typhoon
maximum wind velocity in the normal operation condition: 13.8m/s anti-wind device : 13.8m/s(maximum bearing capability) anchor: 28.4m/s(maximum bearing capability) administrative staff: They should arrange inspection and detailed examination, ensuring the good condition of anti-wind device of stacker reclaimer. The typhoon practice is carried out in regular time, making each operator of stacker reclaimer could operate various anti-wind device. maintenance personnel: They should do weekly check and timely maintenance, making the rail clamp and anchor flexible and feasible. They should guarantee the complete interlock with electric system. operator of stacker reclaimer: The operator should correctly operate the rail clamping device and anchor. The operator should pay attention to the operating conditions of swing brake and seriously fill in the spot check table. After finishing the operating, the large boom of stacker reclaimer should rotate to the zero degree, and the rail clamping device should be tightened. If the sudden wind comes, the operator should contact the persons in the center control organization in time. After being allowed by related people, the operator could stop the equipment. And about apron feeder, belt conveyor or conveyor components, some detailed tips will be introduced in the following articles. In practice, the slewing bearing failed in many aspects, such as larger load, abnormal impact, abrasion in raceway, noise increasing and other problems. The main causes of these problems include the installation of slewing bearing, stress of slewing bearing, and post-maintenance of slewing bearing. The installation of slewing problems mainly include quality flaw of slewing bearing. The overall quality of slewing bearing is better, but there will be some problems in transporting and storing, such as deformation in slewing bearing. The weak location of slewing bearing is broken. The ball track of slewing bearing is processed with quenching. Then there will be quenching weak area in the slewing bearing, where the hardness and intensity are poor. In this way, the failure of slewing bearing may occur because of this reason. Besides, installation accuracy of slewing bearing is bad. When the slewing bearing works, its end face and supporting platform should coordinate closely. If the flatness error of supporting platform exceed the permission range, this will result in the deformation of slewing bearing, leading to many problems such as unstable operating, much noise, large impact, and large loads of the reclaimer. In fact, the reclaimer would coordinate with other mining equipment such as belt conveyor design, screw conveyor and etc. So the normal operating of the reclaimer influences the other related equipment. Any process of the project must not have failure. |