Jaw Plate

Jaw Crusher Parts Plates,Jaw Crusher Metal Plate Design

Jaw Crusher Plate Design

Recently, concern for energy consumption in crushing has led to the consideration of decreasing the weight (and consequently the stiffness) of the swing plate of jaw crushers to match the strength of the rock being crushed. An investigation of the energy saving of plate crusher interaction when point load deformability and failure relationships of the rock are employed to calculate plate stresses. Non simultaneous failure of the crusher particles is incorporated into a beam model of the swing plate to allow stress calculation at various plate positions during one cycle of crushing. In order to conduct this investigation, essentially two studies were required. First, point load-deformation relationships have to be determined for differing sizes of a variety of rock types. Even though much has been written about the ultimate strength of rock under point loads, very little has been published about the pre and post-failure point load-deformation properties.


(1) Finite element analysis of swing jaw plates is carried out, using eight-noded brick element to predict the behavior when it is subjected to point loading under simply supported boundary conditions.

(2) The accuracy of results obtained using the present formulation is demonstrated by comparing the results with theoretical analysis solution. Moreover, the results of stresses are calculated at points and they are expected to differ from the analytical solutions.

(3) The present jaw plate models accurately predict the various stresses for plates. As the present models are developed using a non-conforming element, the results can be further improved using a conforming element with improved mesh size thereby increased no of elements. Infact, FEM results approach the true solutions, with the increase in the number of elements.

(4) The stiffened plate models which leads to reductions in plate weight and indicates that design of new energy-efficient systems of the crushed material.

(5) In case stiffened jaw plates as the number of stiffener increases the strength/weight ratio of the jaw plate increases making it stronger than that of without stiffener.

(6) The stiffened plate models which leads to 25% saving in energy, of course this 25% is an estimate.

(7) The packing arrangement of particles used for the jaw plate analysis shows maximum particles which the plate can accommodate in one crushing cycle.

(8) Consideration of the two particles between the jaw crusher plates reveals the importance of the point-load failure mechanism. Thus, any design based upon both deformation and strength must begin with a point-load idealization.

(9) Design of lighter weight plate of jaw crusher will require a more precise accounting of the stresses and deflections in the crushing plates than is available with traditional techniques.

(10) Rock strength has only been of interest because of the need to know the maximum force exerted by the toggle for energy considerations. Thus a swing plate, stiff enough to crush taconite, may be overdesigned for crushing a softer fragmental limestone.

(11) Design of jaw crushers plates for specific rock types must consider the variability of point load strength and deformability implicit in any rock type name and quarry sized sampling region.

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