As we all know, the working mode of a jaw crusher is a toggle extrusion type. It is driven by an electric motor to drive the belt and pulley, and the moving jaw moves up and down through the eccentric shaft. Materials are crushed or split to achieve the purpose of crushing and discharging. The size of the discharge opening of a jaw crusher refers to the distance at the bottom of the discharge opening between the tooth peak of one jaw plate and the tooth valley of the other jaw plate when the moving jaw plate is close to the fixed jaw plate. Generally speaking, the discharge opening of each model of jaw crusher can be adjusted within a certain range. The commonly used methods to adjust the thickness of the discharge are as follows:
Use a jacking bolt to open the adjusting seat. Between the rear thrust plate support and the rear wall of the frame, place or remove a set of gaskets with equal thickness. By increasing or decreasing the number of gasket layers, the discharge opening of the crusher can be reduced or expanded. This adjustment device features a simple and compact structure, with minimal increase in the overall weight of the machine, making it a commonly used method.
The rear thrust plate is used as the safety device of the crusher. Generally, jaw crushers are equipped with hydraulic safety devices, which can automatically adjust the size of the discharge opening. This method is not only reliable but also facilitates the elimination of faults.
The transmission device can be used to lift or lower the rear wedge iron and move the front wedge iron horizontally. When the rear wedge iron is lifted or lowered, the size of the discharge opening can be adjusted accordingly. This adjustment device enables stepless adjustment without the need to stop the machine during the adjustment process.
The electric control adjustment mechanism can quickly and effectively realize the adjustment and detection of jaw crushers, with precise control over particle size grades, avoiding repeated operations and providing maximum differentiation and accuracy.
In the bearing part of the jaw crusher, a sliding bearing cast with Babbitt alloy is used. It can withstand large impact loads and is relatively wear-resistant, but its rotation efficiency is low and forced lubrication is required.
The above five methods are commonly used for adjusting the particle size of jaw crushers, which can improve the controllability of jaw crushers and effectively reduce the resource consumption of screening operations. However, jaw crushers are divided into small and large types, and the adjustment methods also differ. Large jaw crushers generally adopt hydraulic adjustment, while small jaw crushers usually use gasket adjustment or support device adjustment.
