BTMA–Do you know how to adjust the discharge port of the jaw crusher ?

The size of the discharge port of the jaw crusher determines the particle size of the crushed ore and the production capacity of the equipment.Therefore, in practical applications, according to the requirements of the ore and the performance of the equipment, it is necessary to select a suitable discharge opening size, so that can  meet the requirements of the equipment.

Meanwhile, it is necessary to adjust the discharge port according to different crushing requirements, so as to meet the crushing requirements in different situations. At the same time, it can avoid affecting the crushing efficiency and output of the crusher due to too large or too small discharge port.

There are common jaw crusher discharge port adjustment methods include backing plate adjustment, wedge block adjustment and hydraulic cylinder adjustment.


1、Backing plate adjustment

Change the size of the discharge opening by adjusting the number and total thickness of the back baffles to obtain better crushing effect. The toggle seat of the jaw crusher is located behind the adjustment seat and is usually made of wear-resistant materials. The gasket is placed on the bottom of the discharge port and fixed in the crushing cavity. Typically, a thicker backsplash can narrow the discharge opening, resulting in a smaller particle size. And a thinner back baffle can enlarge the discharge opening, so as to obtain a larger particle size of the material.

The advantage of tailgate adjustment is that it is relatively simple to operate. During the adjustment process, the equipment usually needs to be shut down, and safe operation should be ensured to avoid potential hazards. In addition, the tailgate adjustment can be fine-tuned as needed to meet the particle size requirements of the crushing task. It is important to note that tailgate adjustment is a manual adjustment method that may require some experience and skill. It is recommended to read the equipment operation manual and relevant safety regulations in detail before adjusting the tailgate, and follow the manufacturer’s instructions to ensure proper operation and ensure personnel safety.

2、Wedge block adjustment

The wedge adjustment device consists of two identical wedges, usually made of wear-resistant material, and wedge-shaped. These two wedges are located behind the bracket seat in the adjustment seat, and their inclined surfaces fit together. By changing the relative position of the two wedges, the overall thickness of the wedge pair is changed. In this way, the position of the toggle plate will also change accordingly, thereby moving the position of the jaw plate to realize the adjustment of the size of the discharge opening.

The wedge adjustment device has a large adjustment range and high precision, and can meet the requirements of different crushing tasks on the particle size of the discharge port. This adjustment method is relatively simple, has high flexibility, and can be adjusted in real time during the production process. During the adjustment process, it is usually necessary to stop the machine and take necessary safety measures. In addition, the wear of the wedges should be checked regularly, and replaced or repaired as necessary to ensure the normal operation of the adjustment device and equipment performance.

3、Hydraulic cylinder adjustment

Hydraulic cylinder adjustment is a common adjustment method. By adjusting the hydraulic cylinder in the middle of the toggle plate, the position of the movable jaw is changed, thereby changing the size of the discharge port and controlling the discharge size of the crusher. This hydraulic cylinder adjustment method has the characteristics of wide adjustment range, fast response speed and easy operation. It can also be used for iron removal and cleaning, which improves the convenience of operation and reduces the labor intensity of workers. By adjusting the oil pressure and flow in the hydraulic system, the size of the discharge port can be precisely controlled to meet the particle size requirements of different materials. It should be noted that during the adjustment process of the hydraulic cylinder, it is necessary to ensure the normal operation of the hydraulic system and follow the corresponding safety operating procedures. Regularly check the sealing performance of the hydraulic cylinder and perform maintenance to ensure its reliability and stability.

Compared with traditional manual or mechanical adjustment methods, the manufacturing cost of this hydraulic cylinder discharge port adjustment device is relatively high. Therefore, at present, the gasket type and the wedge type are the most commonly used methods for adjusting the discharge opening of the jaw crusher. These two methods are relatively simple, low in cost, and to a certain extent meet the needs of discharge opening adjustment. The hydraulic cylinder adjustment device has greater flexibility and precision in terms of functionality and performance, and has strong adaptability. However, it has a higher cost and requires advanced operation and maintenance skills. In practical application, it is necessary to comprehensively consider the specific situation (such as budget, production requirements, etc.) to select the appropriate adjustment method for the discharge opening.

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