JULI Engineering

The portal scraper reclaimer and boom scraper reclaimer are the main types. The differences are as follows: 1. The portal reclaimer has reasonable structure. The partial weight of portal frame and scrapper reclaimer is supported by the wall(blocking materials). In this way, the stress state under the central cylinder, and the running of the portal scraper could operate smoothly. And the boom scraper reclaimer's load could be transmitted to the central cylinder. In this way, the design and manufacturing difficulty is large and the stability of the equipment is bad. 2. The portal reclaimer has compact structure, and there is no need to design the balance weight. The space occupied under the portal reclaimer is small. The boom reclaimer should be designed with large balance weight. 3. The portal reclaimer need the circle track in the wall(blocking materials), and the related cost of setting circle track. The balance weight load of the boom scraper reclaimer is central under t...

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 f...

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 shoul...