Jaw crushers are widely utilized in mechanical engineering due to their effectiveness, but ensuring their longevity requires careful attention during assembly. Here are some key points to keep in mind:
Firstly, when installing the bearings, it’s essential to use thermal expansion principles to achieve proper interference fit. This means carefully controlling the heating process and selecting the right temperature based on the specifications and sizes of the bearings. Each type of bearing may require a unique approach to ensure accurate installation.
Secondly, specialized steel hammers should be used during assembly to gently tap the bearings into place. It's important to apply diagonal pressure to balance the entry of the bearings onto the eccentric shaft. Once the eccentric shaft begins to engage with the moving jaw, a hammer can be used to gently strike the moving jaw, creating enough force to slide the eccentric shaft smoothly into position without damaging the bearings.
Before starting operations, the jaw crusher should be adequately lubricated by injecting grease between the thrust plate and the adjustment seat. After running the machine idle for a while, check the current, voltage, and listen for any unusual noises. Only after confirming everything is normal should you begin feeding stones into the crusher. To protect the equipment, graded flushing at the inlet is recommended to prevent large stones from directly striking the crusher opening. Stones larger than the inlet size should be pre-blasted to reduce their size before entering the crusher, which helps prolong its operational life.
When assembling the crusher, the fixed jaw plate must be securely fastened to the frame. A soft metal, such as lead or zinc, should be used as a gasket between the jaw plate and the crushing plate, followed by tightening with bolts. During operation, the crushing plate should remain stable and not shift. If it becomes loose, it could crack or wear prematurely, shortening the lifespan of the crushing plate. Proper installation during assembly is crucial to maximize its durability. Extending the life of the crushing plate also enhances the overall productivity of the manufacturer.
In addition, regular maintenance checks are vital. Inspect the wear levels of all components periodically and replace parts as needed. Keeping the machine well-lubricated and free of debris ensures smooth operation and extends its operational life. These steps, combined with careful assembly practices, contribute to the efficient and prolonged performance of jaw crushers.
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