The jaw crusher liner is an indispensable part of the jaw crusher. If the jaw crusher liner wears too much, it will affect the working efficiency of the jaw crusher. This article mainly introduces the related wear problems of the jaw crusher liner and how to choose a suitable jaw crusher liner.
The choice of jaw crusher liner material?
The jaw crusher liner should be made of wear-resistant materials, and the jaw crusher liner should have the surface hardening under the impact load to form a hard and wear-resistant surface, while still maintaining the original toughness of the internal metal. It can be used as a common material for jaw crushers. The commonly used lining materials are high manganese steel and high chromium alloy.
How to increase the working efficiency of jaw crusher?
The first is to choose the appropriate jaw crusher liner material. Choosing the right material can effectively increase the service life of the liner, so that the working efficiency of the jaw crusher can be increased.
The second is to reduce the surface roughness of the jaw crusher liner, which is a way to improve the fatigue resistance and wear resistance of the liner. The requirements for the surface roughness of the liner are related to the contact stress on the surface of the liner. Generally, when the contact stress or the surface hardness of the liner is high, the requirements for the surface roughness of the liner are relatively low.
The third is the appropriate shape of the jaw crusher liner. For example, the smooth surface of the liner under the same conditions, compared with the toothed liner, the productivity is increased by about 40%, and the service life is increased by about 100% . 50, the crushing force has also increased a lot.
However, the particle size of the crushed product cannot be controlled, and the power consumption also increases slightly. Therefore, in the case of high product particle size requirements, it is not suitable to use a smooth liner, so it is necessary to choose the appropriate shape of the jaw crusher liner for crushing.
How to remove the jaw crusher liner?
The jaw crusher mainly relies on the interaction of the toothed liners of the dynamic and static jaws to crush materials, so the toothed liners are easily worn or cracked by impact. According to the flow path of the material, it can be seen that the most worn part of the liner is mainly concentrated in the middle and lower parts. Generally, when the wear reaches three-fifths, the liner can no longer be used.
At the same time, in order to save the operating cost of the machine, the liner can be turned around, that is, the relatively complete upper part can be replaced by the lower part to continue to use, until the entire jaw crusher liner meets the wear requirements, it can be replaced as a whole. Reduce the use cost of the whole machine.
What is the reason for the fracture of the jaw crusher liner?
- The unqualified forging process of the jaw crusher’s mobile jaw liner in the casting process has resulted in a lot of air holes and some other defects on the movable jaw liner, which will cause fracture or breakage during work.
- When unbreakable materials enter the jaw crusher, this will increase the impact pressure, and the toggle plate does not have a good function of self-breaking maintenance, so the impact force will be transmitted to the movable jaw liner.
- The displacement of the movable jaw liner changes during the working process, resulting in the collision between the bottom of the movable jaw liner and the frame guard plate, resulting in the breakage of the movable jaw liner.
- The tie rod spring fails, resulting in increased pressure on the movable jaw liner.
- The distance between the movable jaw lining plate and the fixed jaw lining plate determines the size of the ore discharge port, and when the ore discharge port size is unreasonable, it will also cause the movable jaw liner to break.
- If the feeding is unreasonable, it will also cause the material to enter and increase the impact pressure on the movable jaw liner.
How to replace the jaw crusher liner?
The fixed jaw liner, movable jaw liner, and both side liners of the jaw crusher are easy to wear and tear. If the wear block will affect the production of materials, when the liner is initially worn, the liner can be turned around and used, or two pieces up and down can be used. When turning around, the wear of the jaw plate is mostly concentrated in the middle bottom. When the lining plate is worn to 3/5, the lining plate needs to be replaced, and when the lining plates on both sides are worn to 2/5, it also needs to be replaced.
Precautions for installation of jaw crusher liner?
Since the surface of the jaw crusher liner is usually cast in a wavy or triangular shape, the tooth peaks and tooth valleys of the two liners are just opposite to each other during installation. Such a liner not only squeezes the material, but also bends and splits it. The effect is to make the material easy to break.
The tooth peak angle of the liner is generally 90 degrees to 120 degrees, and the corrugated surface can be used for coarse crushing, and the included angle should be larger. The size of the tooth pitch depends on the size of the material, the smaller the tooth pitch, the finer the material.
How to prevent the wear of the jaw crusher liner?
Because the wear of each part of the jaw crusher liner is uneven, usually the lower part wears faster. Therefore, in order to prolong its service life, the thickness of the lining plate of the fixed jaw plate can be increased, so that its wear and tear can be avoided briefly.
This is the whole introduction of the jaw crusher liner in this article, I hope it can help everyone. If you have any other questions you want to consult, you can leave a comment below the article, and we will reply to everyone’s comments and messages one by one. At the same time, there are other excellent articles on our website, you are welcome to browse them.