Jaw crusher is mainly crushing hard stone through the extrusion between two jaw plates. After some time, it needs to adjust the gap between the jaw plates. Is there any way to achieve the required material size without replacing crushing machine? Here, we will provide methods for adjusting the gap size of jaw crusher and the equipment used. The common ways to adjust jaw crusher gap are wedge- type adjustment, screw-type adjustment and gasket-type adjustment.
Methods to adjust jaw crusher gap
1. Preparation before adjustment
Shut down the jaw crusher and make sure the power supply is cut off to ensure the safety of the operator. Wait for the crusher to completely stop running and all moving parts to come to a standstill.
Clear the materials inside the crusher. Use tools such as shovels and brushes to remove the crushed materials remaining in the crushing chamber to avoid interference during the adjustment process.
2. Locate the adjustment mechanism
Different models of jaw crushers have different adjustment mechanisms. Commonly, there are wedge- type adjustment devices, screw-type adjustment devices and gasket-type adjustment advices.
2-1. The wedge type adjustment is composed of two wedge blocks. The inclined surfaces of the wedge blocks are close to each other. Changing the relative position can change the total thickness of the wedge block pair, thereby changing the front and rear positions of the toggle plate and the movable jaw, and deeply adjusting the size of the discharge port. Usually it is for C series jaw crusher.
For the wedge - type adjustment device, it usually consists of a set of wedges. By driving the wedges to move, the position of the movable jaw can be changed to adjust the gap.
2-2. For gasket-type adjustment device, it it to add a set of gaskets of equal thickness between the rear thrust plate support and the rear wall of the frame.Usually it is for PE series jaw crusher in middle and large size, such as PE500X750, PE600X900, PE750X1060, PE900X1200 and so on.
2-3. For the screw - type adjustment device, it uses a series of screws. Rotating the screws can push or pull the movable jaw to achieve gap adjustment. It is for small scale jaw crusher.
3. Method and tools to adjust the gap of jaw crusher
3-1 If it is a wedge - type adjustment:
There are two major ways to change the size of the discharge port: equipment adjustment and hydraulic adjustment. Equipment adjustment is to manually rotate the adjusting screw to match the movement of the wedge block, and hydraulic adjustment is to rotate the hydraulic cylinder to match the movement of the wedge block.
Use a sledgehammer or other suitable tools to gently tap the wedge. Tapping in the appropriate direction can cause the wedge to move, thereby increasing or decreasing the gap between the fixed jaw and the movable jaw. For example, if you want to reduce the gap, you need to drive the wedge so that the movable jaw moves closer to the fixed jaw.
During the adjustment process, it is necessary to measure the gap regularly. You can use a feeler gauge to measure the gap at different positions of the crushing chamber to ensure that the gap is adjusted evenly.
3-2. If it is a gasket-type adjustment:
By increasing the number of gaskets, the discharge port of the crusher can be reduced. If the size of jaw crusher discharge port needs to be increased, the number of gaskets needs to be reduced accordingly.
3-3. If it is a screw - type adjustment:
Use a wrench or other tools to rotate the adjustment screws. Rotating the screws clockwise or counterclockwise according to the requirements can change the position of the movable jaw. For example, turning the screws to make the movable jaw move upward can reduce the gap.
Similar to the wedge - type adjustment, it is also necessary to monitor the gap during the adjustment process to ensure the accuracy of the adjustment. This video will tell how to use screw type adjustment method.
Tools needed for jaw crusher gap adjustment
Jaw crusher gap adjustment is very convenient, only need to adjust the pull rod spring behind the jaw plate, you can increase or reduce the spacing. The method can be applied to a wide range of jaw crushers, including large jaw crusher and the required material size can be achieved without expanding or reducing the size of jaw crusher. Let us study the detailed method as below.
1. Toggle plate adjustment. The toggle plate of jaw crusher is to transfer power to make the movable jaw plate swing back and forth, and also it has the role of safety insurance. Changing its length could be used to adjust jaw crusher discharge port.
2. Gasket adjustment. Put a set of gaskets between the back support seat of the rear toggle plate and the back wall of the rack, increase or decrease the number of gaskets or change its thickness, so as to reduce or increase the outlet of jaw crusher. This method has the advantages of compact structure and reliable adjustment. So it is widely used in large and medium-sized jaw crushers.
3. Wedge adjustment. Adjust with two wedges placed between the backseat of the toggle plate and the frame. The more wedge number, the outlet is smaller. This method is suitable for small scale jaw crusher.
4. Large jaw crusher can not be adjusted by human power, it generally uses hydraulic adjustment. Small jaw crusher generally uses wedge adjustment or support device adjustment. If the force is not enough, a jack tool could be helpful.
Step by step to adjust jaw crusher gap
The gap setting on a jaw crusher's plate is an important factor that affects the performance of the crusher. Here are the basic steps for setting the gap on a jaw crusher's liner. More detailed steps to adjust jaw crusher gap, the video taken by Baichy Machinery will be more helpful.
1.Turn off the power to jaw crusher
2.Remove the feed hopper and feed tube from jaw crusher.
3.Loosen the lock nuts on the tension rods located at the back of the crusher.
4.Open the crusher to the appropriate width, as determined by the desired gap between the two jaw plates.
5.Insert a feeler gauge between the two plates at the point where the crusher is the narrowest, and adjust the crusher to the desired width.
6.Tighten the tension rods to lock the jaw plates in place.
7.Reattach the feed hopper and feed tube.
8.Turn on the power to the jaw crusher and test its performance
Check and fine - tune
After the initial adjustment, turn on the jaw crusher for a short test run (it is best to run it empty first). Observe whether the crusher runs smoothly and whether there is abnormal noise.
Check the size of the crushed products after the test run. If the particle size of the products does not meet the requirements, make further fine - tuning of the gap until the desired crushing effect is achieved.
Choose one suitable methods and following above adjusting steps, the jaw crusher performance and service time will be much improved. Maybe some problem you may meet, we are pleased to detailed guide by call or video. Baichy Machinery has more than 20 years jaw crusher production experience. We have mature technology and processes, complete models and configurations, and technical engineers can tailor jaw crusher and stone crusher production line configuration plans for you. If you are interested in the jaw crusher, please click on the online consultation to contact us. Baichy Machinery is dedicated to serving you 24 hours a day!
Frequently Asked Questions: About Jaw crusher
1. What is the gap on a jaw crusher?
Actually it is the discharge opening of a jaw crusher. The swinging jaw which reciprocates in a horizontal plane usually makes an angle with the fixed jaw. The jaw crusher gap is the bottom of angle.
2. When to need adjusting jaw crusher gap?
User has certain outlet size requirements, or continuous wear of the jaw plate, it could adjust the jaw crusher simply to prolong jaw crusher lifetime and save cost.
3. How to increase the output of jaw crusher
Increasing jaw crusher production can be done by control the feeding size without jamming or clogging, Reasonably adjust the discharge port and realize the pre-screening process. Most importantly, make sure you are using the right stone crusher for your job.
Jaw crushers are comprised of a fixed plate and a moving plate. To prolong jaw crusher's service time, we need to know its foundation construction, installation, maintenace, proper operation and spare parts replacement.
2024-12-18
86-15093113821
86-15093113821
