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WEG products used to create innovative jaw crusher unblock system

04 January 2021

According to the Health and Safety Executive’s guidance for the safe operation and use of mobile jaw crushers, equipment operators may be subject to multiple risks, including exposure to dust, noise, whole-body vibration and being struck by objects ejected from the crusher.

Here's how WEG’s premier distributor Technidrive developed an energy-efficient automatic jaw crusher unblock system using WEG products.

Commonly used in the quarrying, mining, recycling of demolition waste and chemical industries, jaw crushers are a reasonably difficult application for systems integrators, due to the large inertia of the flywheel, cyclic loading and differences in materials with which customers feed them.
This didn’t prove to be a problem for Technidrive, who was initially approached by a customer looking to implement a new motor in their jaw crusher machine. Using a combination of WEG products, Technidrive was not only able to improve the efficiency and reliability of the motor, but the efficiency and safety of the entire jaw crusher system. WEG was asked to supply the motor, control and alternator for the project due to the quality, versatility and energy efficiency of its product line.

Crushing is an important process in turning rock into a useable product. Rock enters the jaw crusher from the top of the machine and gets compressed between two surfaces – the fixed and moveable jaw. The rock will continue to be crushed until it is small enough to fall through the opening. Ensuring that the size of raw material is appropriately matched to the jaw opening can alleviate blockage incidents. This can be achieved by removing oversize products prior to processing and careful control of the crusher feeder; however, blockages do still occur. To unblock a crusher, a plant must be shut down and the system must first be isolated. However, despite these precautions, a crusher can still be a serious risk to personnel due to the amount of kinetic energy that is released during unblocking. 

Technidrive wanted to develop a system that was highly energy efficient and, crucially, removed operators from the dangerous job of manually removing blocked material from jaw crusher machines.

Read the full article in the January issue of DPA

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