The jaw crusher is composed of many parts. The parts of these jaw crushers have been introduced before, and the jaw plate of the crusher has also been specially introduced. In the last article, someone asked what is the jaw crusher toggle plate, so now I will introduce the jaw crusher toggle plate to you. This article mainly introduces what is the jaw crusher toggle plate, and the common faults and solutions of the jaw crusher toggle plate.
What is a jaw crusher toggle plate?
The jaw crusher toggle plate is a cast iron casting made of special alloy after accurate calculation. It is not only a force transmission component, but also an insurance part of the jaw crusher. When the unbreakable material falls into the crusher and the machine is overloaded, the jaw crusher toggle plate will be broken immediately, and the crusher will stop working to prevent the damage of the entire machine.machine.
What is the function of the jaw crusher toggle plate?
- One is to transmit power
- The power it transmits is sometimes even greater than the crushing force.
- The second is to play the role of insurance parts
- When the crushing cavity falls into the non-crushing material, the jaw crusher toggle plate will break first, thus protecting other parts of the machine from damage.
- The third is to adjust the size of the discharge opening
- Some jaw crushers adjust the size of the discharge opening by replacing the toggle plates of different lengths.
The structure of jaw crusher toggle plate?
According to the structure, the jaw crusher toggle plate can be divided into two types: assembled type and integral type: the toggle plate used by the simple swing jaw crusher is an assembled structure. It is assembled by connecting a bracket body and two bracket heads, so that only the easily worn and scrapped bracket heads can be replaced to save the easily worn metal parts.
Because the brackets used in large crushers are relatively heavy, the brackets are designed with lifting rings. Integral toggle plates are used on compound pendulum jaw crushers because of their large weight and size.
What should be paid attention to when designing the jaw crusher toggle plate?
There are generally two structural forms of elbows and elbow pads: rolling type and sliding type, which should be selected according to actual needs during design.
Change the shape of the matching surface: According to the motion analysis of the compound pendulum jaw crusher, it can be known that the movement of the toggle plate is a simple swing, which belongs to the hinged swinging part. Therefore, the elbow and elbow pad constitute a kind of swing pair. During the operation of the crusher, the bracket pad is deformed due to the long-term impact, and it is difficult to remove it during replacement. Therefore, the shape of the mating surface can be changed to solve this problem.
Use better materials: The structural forms of brackets are integral and combined. Therefore, in order to ensure the performance requirements of the machine during operation, the elbow pads bear a large impact force, and better materials must be used to make the elbow pads.
Install a dust baffle: In order to reduce the friction between the elbow pad and the elbow, in addition to often injecting lubricating oil between the two joint surfaces, it is necessary to prevent dust and fine materials from entering the joint. Therefore, a dust baffle should be installed on the upper part of the joint.
How to install the jaw crusher toggle plate in general?
The jaw crusher toggle plate is both a safety part and a wearing part, which is easily damaged. When the toggle plate is worn and broken, it should be replaced immediately, so how should the toggle plate be replaced after wear? Let me tell you the following:
- To install the toggle plate of the jaw crusher, first loosen the tie rod spring nut, and then remove the spring.
- Tie it to the lower part of the movable jaw with a chain and a steel wire.
- Use a professional installation tool to pull the wire so that the movable jaw is close to the fixed plate, and the toggle plate will fall down automatically.
- After the old bracket is removed, the new bracket is pulled into the bracket seat by wire.
- Then, loosen the installation tool so that the toggle plate and toggle seat are in close contact.
- Finally, the tie rods and springs are installed and the toggle plate is supported in the toggle plate seat, and the installation tool can be removed.
The above are the installation steps of the toggle plate of the jaw crusher. Correct installation can reduce the normal operation of the crushing equipment due to improper installation in the future work, which can also save the time of the jaw crusher downtime for maintenance.
General failure and solution of jaw crusher toggle plate?
When using, the main engine is overloaded, or the ore material is larger than the size of the feeding port and forced to enter:
Due to the load of the main machine of the jaw crusher, and the feeding granularity does not meet the requirements, in this case, the toggle plate should be replaced in time, the granularity of the feeding material should be controlled, and the overload operation of the main machine should be prevented.
There are non-crushed objects entering the crushing cavity, resulting in the fracture of the jaw crusher bracket:
Under normal circumstances, the production environment of mining machinery and equipment is relatively harsh, so when the jaw crusher is working, it is inevitable that non-crushed objects will enter the crushing cavity, which will cause the bracket to break. At this time, the toggle plate should be replaced in time and corresponding measures should be taken to strictly prevent non-broken objects from entering the crushing cavity.
There is a deflection between the bracket and the bracket pad, which is not parallel, which will also cause the bracket to break when the crusher is working:
When the jaw crusher is working, if the bracket and the bracket pad are not parallel, it will cause friction between the bracket and the bracket pad, which will damage the bracket and the bracket pad, and eventually lead to the fracture of the bracket and the breakdown of the bracket pad. damage. At this time, the brackets and the worn bracket pads should be replaced, and the brackets should be installed correctly so that they are parallel to the brackets.
The casting itself has serious defects:
Due to the quality defect of the toggle plate of the crusher itself, in this case, it is only necessary to replace the toggle plate with good performance.
The output of jaw crusher to reach 5-8 cm?
Gasket adjustment
The adjusting pad is generally located behind the toggle plate seat in the adjusting seat. When the discharge opening needs to be adjusted, the number of backing plates can be increased or decreased, and the total thickness of the backing plate can be changed, so that the front and rear positions of the toggle plates can be changed, and the front and rear positions of the lower part of the movable jaw can be moved to adjust the size of the discharge opening.
Wedge block adjustment
The wedge-shaped block adjustment device is mainly composed of two identical wedge-shaped blocks. The wedge-shaped block is located behind the bracket seat in the adjustment seat, and the inclined surfaces of the two wedge-shaped blocks are relatively close together. By changing the relative position of the two wedge-shaped blocks, the total thickness of the wedge-shaped block stack can be changed, so that the front and rear positions of the bracket can be changed. Change, move the front and rear positions of the lower part of the movable jaw to change the size of the discharge opening.
Hydraulic cylinder adjustment
The hydraulic cylinder discharge port adjustment device is equivalent to installing a large oil cylinder in the middle of the toggle plate, so that the length of the toggle plate can be adjusted steplessly, thereby changing the front and rear positions of the movable jaw and realizing the size of the discharge port. Adjustment. The discharge port adjustment device of this structure can not only automatically adjust the size of the discharge port, but also realize the functions of passing iron and cleaning the crushing cavity, which is convenient for operation and reduces labor intensity.
How to replace the jaw crusher toggle plate?
When the toggle plate wears too fast or breaks, the stone in the crushing cavity must be removed first, take out the toggle plate that wears too fast or is broken, check whether the toggle plate on the movable jaw and the connecting rod is damaged, and then remove the movable jaw.
Pull it to the vicinity of the fixed jaw, after lubricating the working surface of the toggle plate with lubricating oil, replace it with a new thrust plate to make it gradually contact with the working surface of the toggle plate, and tighten the pull rod so that the movable jaw clamps the thrust plate, Tighten the safety cover, connect the lubrication system, and then adjust the size of the outlet.
This is the introduction of the jaw crusher toggle plate in this article. Do you have a certain understanding of the toggle plate? If you have any questions, it doesn’t matter, you can leave a comment below this article, and we will answer your questions one by one. At the same time, there are many excellent articles on our website, you are welcome to browse.