The characteristics of hydraulic jaw crusher and the method of adjusting the discharge port

Hydraulic jaw crusher is a new type of crushing equipment. Although it is a new type of crushing equipment, it is also widely used in various mines. This article mainly introduces what is the hydraulic jaw crusher and the working principle of the hydraulic jaw crusher. At the same time, it also introduces the characteristics of the hydraulic jaw crusher and how to adjust the outlet size of the hydraulic jaw crusher.

A photo of a hydraulic jaw crusher

What is a hydraulic jaw crusher?

A photo of a hydraulic jaw crusher

Hydraulic jaw crusher is a new type of crushing equipment. It is a double-cylinder hydraulic compound pendulum jaw crusher, which adopts a hydraulic system. After repeated practice, the crushing equipment has also reached an ideal state in actual use. Hydraulic jaw crushers are widely used in metallurgy, mining, building materials, chemical industry, coal industries, mainly for primary crushing of materials.

What is the working principle of hydraulic jaw crusher?

A photo of a hydraulic jaw crusher

The material enters the crushing cavity from the feeding port, and is crushed by repeated extrusion and breaking of the material by the movable jaw plate and the fixed jaw plate. The hydraulic system is the overload protection device of the machine. It uses the retractable toggle plate to support the oil cylinder to realize the overload retreat action of the crusher under the overload state.

The high-pressure oil provided by the hydraulic station enters the high-pressure chamber of the oil cylinder through the oil inlet, and the piston supports the toggle plate through the sliding shoe. Under normal crushing operation, the predetermined working pressure of the hydraulic system enables the piston to provide stable support for the toggle plate. When the hydraulic jaw crusher encounters unbreakable materials during the operation, it will discharge the unbreakable materials through overload retreat through the hydraulic system.

After discharging the materials that cannot be broken, the hydraulic jaw crusher automatically resumes normal operation without stopping the machine, and can repeat the overload protection action and run continuously.

What are the basic characteristics of hydraulic jaw crusher?

A photo of a hydraulic jaw crusher

The rated load of the hydraulic jaw crusher can be set arbitrarily, which can be used for selective crushing of materials with different compressive strengths

Reliable protection, automatic discharge of unbreakable objects, effectively solving the problem of machine jamming during crushing, and realizing continuous production without stopping

The single hydraulic cylinder supported by the hydraulic station can not only adjust the size of the discharge port, but also unload and discharge the unbreakable objects. It will not cause asynchrony like the double hydraulic cylinder, which will cause the deflection of the movable jaw and damage the body.

Self-contained hydraulic cylinder, computer control system

What are the advantages of hydraulic jaw crusher?

A photo of a hydraulic jaw crusher
  • High quality and high reliability
  • The jaw plate is available in manganese steel, modified manganese steel and ultra-high manganese steel, among which the life of ultra-high manganese steel is more than 2.6 times that of ordinary manganese steel
  • Larger than crusher bearings of the same class, all four bearings are of the same size
  • Repairable crusher frame
  • Hydraulic system works efficiently even with a certain degree of contamination

How to adjust the size of the discharge opening of the hydraulic jaw crusher?

A photo of a hydraulic jaw crusher

The size of the discharge opening of the hydraulic jaw crusher refers to the distance between the tooth peak of one jaw plate and the tooth valley of the other jaw plate at the bottom of the discharge opening when the movable jaw plate is close to the fixed jaw plate. Generally speaking, the discharge port of each type of hydraulic jaw crusher can be adjusted within a certain range. The commonly used methods to adjust the discharge thickness are as follows:

Shim adjustment

Use the jacking bolt to open the adjustment seat, avoid the quality inspection behind the rear thrust plate support and the frame, put in or take out a group of gaskets with the same thickness, and increase or decrease the number of gasket layers to make the crusher row. The feed opening decreases or increases. This kind of adjustment device has a simple and compact structure, and the weight of the whole machine does not increase much, so it is more commonly used.

Hydraulic adjustment

The rear thrust plate is used as the safety device of the crusher. Generally, the hydraulic jaw crusher adopts a hydraulic safety device, which can automatically adjust the size of the discharge opening, which is reliable and easy to discharge the materials that cause the failure.

Use the inclined iron to assist adjustment

The transmission device can be used to lift the rear inclined iron and move the front inclined iron horizontally. When the rear inclined iron is lifted or lowered, the size of the discharge port can be adjusted accordingly. Don’t stop the machine.

Electronic control adjustment mechanism

The electronic control adjustment mechanism can quickly and effectively realize the adjustment and detection of the hydraulic jaw crusher.

Support device adjustment

In the bearing part of the hydraulic jaw crusher, the sliding bearing cast with alloy is used, which can withstand a large impact load and is relatively wear-resistant, but it needs to be forced to be lubricated when it is converted to precise precision.

The above five methods are the most commonly used methods for adjusting the thickness of the discharged materials, which can improve the controllability of the hydraulic jaw crusher and effectively reduce the resource consumption and waste of screening work. However, the hydraulic jaw crusher is also divided into small and large, and the adjustment methods are also different. The large hydraulic jaw crusher generally adopts the hydraulic adjustment method, and the small crusher generally adopts the gasket adjustment or the support device adjustment.

What is the safe operation of a hydraulic jaw crusher?

A photo of a hydraulic jaw crusher

Start-up of the crusher

After inspection, it is proved that the machine and transmission parts are in normal condition before starting

The machine is only allowed to start without load

When starting, there should be a signal to warn in advance. If any abnormal phenomenon is found after starting, the machine should be stopped immediately, and the cause of the fault must be checked. After the abnormality is discharged, the crusher can be restarted again.

Use of the crusher

The material can be input only after the hydraulic crusher is in normal operation.

Safe operating procedures

  • Operators must go through safety technical education before they can operate on the machine
  • It is strictly forbidden to peep into the machine from the upper part of the crushing chamber during operation
  • The electrical equipment should be connected to the ground, and the wires should be insulated and installed in the steel pipe.
  • It is strictly forbidden to reach out and directly enter the feeding port during operation to carry the materials in the crushing cavity
  • During the operation of the crusher, any adjustment, cleaning or maintenance work is strictly prohibited
A photo of a hydraulic jaw crusher

This is the whole introduction of the hydraulic jaw crusher in this article. I don’t know if everyone has a clear understanding of the hydraulic jaw crusher. If you still have questions and do not understand clearly, you can leave a comment under our article. We will reply to your comments one by one. At the same time, there are other excellent articles on our website. You are welcome to continue browsing on our website.

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