Gyratory crusher is also known as vertical compound crusher, because of its superior performance characteristics; it is widely used in the coal, construction, railway and other major industries. However, after the long-term use, gyratory crusher parts or fittings will appear wear, deformation, fatigue, corrosion, cavitation, and loosening these phenomena, which will lead to the loss of the crushing machines original work performance, and the deterioration of the crushers technical condition. At this time, you need to exclude the fault occurred of the crusher.
Crusher experts will do an analysis about the crushing machines typical failure, it makes us know how to exclude fault well.
One of the typical faults often appears of gyratory crusher: spindle breakage. The spindle of gyratory crusher is the key part and it composes the moving vertebral with cone liner. In actual production, the major accident that spindle breakage caused is numerous, among that, 90% of the breaks occurred in the thread undercut. The main reason for this failure occurred: the undercut is deep, undercut rounded edge is small. In the undercut, the lining and the spindle thermal loading produces stress concentration, the roughness degree of rounded surface has no strict requirements.
Response: Accelerate the side crossing fillet, increase the unloading groove, or transform and design from the spindle structure.
Typical failure: On the upper and lower dangerous section has higher stress. A super-large piece of ore is into the crusher, the crushing force impacts on the top of the cone and produces cracks near the vicinity of the cross-section; another one is the iron into the crusher, stuck in the port of discharge, causing motor overload and producing the cracks near the vicinity section.Response: Adopt the thrust plate, keep the lubricating oil clean, and improve the installation and machining accuracy of the thrust disk. At the same time, adopt the way of scraping and fine caring to ensure that the contact surface is evenly distributed.
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