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Jaw Crusher equipment simulation

Jaw crushers are equipment used to reduce the size of many different types of materials in many applications. Analyzing jaw crushers in CAE software continues to be a challenge due to the complexity of the motion.

Rocky DEM enables engineers to analyze a variety of movements. Motion can be predefined or not, like in projects with a free degree of motion (when the movement depends on the interactions with your surroundings).

The movement in a jaw crusher may be challenging to prescribe and set up, but the developed motion kernel in Rocky DEM allows you to build a model.

Rocky DEM’s simulation technology enables you to study the workings of the equipment, to improve the equipment’s process and integration, and make improvements in the prototypes, empowering you to develop equipment with more robust and optimized design.

Rocky DEM simulates the particle breakage in Jaw Crusher equipment. It is possible to prescribe the complex motion of the Jaw due to the robustness and flexibility of motion kernel technology developed by Rocky DEM.

The wear model implemented in the solver predicts the abrasive wear of solid surfaces due to the action of impacting particles. You can test different materials and calibrate your equipment to create optimum time usage.

The figures below show two regions of the jaw crusher: the moving part (moving jaw) and the fixed part (fixed jaw).

The comparison between the before and after equipment usage is provided. Look at the deterioration of the wall due to the breakage. In other words, the simulation can provide the life cycle of the equipment.

Fixed jaw - Wear model
Figure 1: Fixed jaw – Wear model
Moving jaw - Wear model
Figure 2: Moving jaw – Wear model

Wear modelAnother important analysis involves quantitative data. Rocky DEM provides a lot of data, including the power on the equipment shaft, which takes into account the energy for the breakage.

This analysis also provides information about the energy used by the equipment and enables you to make adaptations to reduce this value.

the power on the equipment shift
Figure 3: The power on the equipment shift

The figure above shows the power on the equipment shift. Look carefully at the curve peaks, where the breakage of the larger particles occurs.


Alan Zago

CAE Applications Engineer

Graduated with a degree in chemical engineering from Federal University of Santa Catarina (UFSC), where he's currently pursuing a master's degree. Since 2013, Alan has been a numeric simulation specialist focusing on multiphase flow as a CAE applications engineer at ESSS in the Rocky DEM group.

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