The cone crusher’s liner plate also known as. the crushing wall and smash mortar wall of a cone crusher have their purpose in lifting the grinding medium and grinding the ore. Three aspects should be taken into consideration when selecting the cone crusher liner to use that are: power consumption, output and wear resistance. Generally, the liner is chosen based on the principle of maximum feed size, change of particle size, distribution of size of the feed, the hardness of the material, the wear resistance of the material etc. The more long the liner, the higher the power consumption.

Cone Crusher Liner Plate – Role

The function of the cone crusher liners is to guard the barrel from direct impact and abrasion from the grinding body as well as the material. It may make use of its various work surfaces to modify the condition of the grinding body to increase the crushing impact of the grinding day on the material, improve the efficiency of grinding, boost the output, and reduce the loss of the media and liner.

Cone Crusher Liner Plate Replacement

The liner plate of the cone crusher could be used by turning the tooth plate around, or with both the upper and lower plates rotated when wear is not at the level to be replaced. The cone crusher’s liner plates should be replaced if it has worn to 65%-80% thickness, or if there are indications of wear such as cracks or deformation. Verify that the centers of the liner plates have been installed correctly after installation. The wrong center can cause friction problems within the machine, including different sizes of products and collisions when the products are rotating.

Cone Crusher Liners – Materials

Liner plates for cone crushers were constructed of high manganese, modified high-magnenese steels, carbon alloy steels, and chrome cast iron. In order to extend the life of the liner plate, Hongxing Heavy Industry generally adopts manganese steel that contains 12% or more manganese, which forms hardenability and wear resistance on its surface, even under a strong impact load.

Cone Crusher Liner Plate – Choice

Liner plate yield A crusher’s yield depends on the production output of the crusher, and the production output of the crusher is directly related to the liner plate of the cone crusher. the higher the output of the liner plate, the less the cost of production for the crushing manufacturer, thus improving the margin of profit.

Power consumption of liner plate The larger the liner plate, the greater the power consumption. Choose short liner plate for hard material, long liner plate for soft material: short liner plate for fine material, long liner plate for coarse material. Mill Liners Foundry must choose the best liner plate for their specific requirements.

The liner’s wear resistance: Due to the variety of materials used in its production its wear resistance is different. This can lead to shrinkage in the product and decrease in productivity. This could result in uneven product size and lower productivity. It could cause economic losses to the users. So, it is important to pay attention to the wear resistance of the crusher liners plate before deciding on it.

Cone Crusher Liner Plate Installation

(1) Put dry ice in the bore of the bushing. The cooling process will shrink the diameter. A small amount of packing can be added to the bushing to make full contact between the dry ice and the bushing.

(2) (2) Fill the bushing with dry-ice, then wrap it with canvas, keeping frosting off the outside.

(3) The cooling time is two hours. To confirm that the bushing has been sufficiently cooled, take a measurement of the diameter.

(4) When the bushing has cooled sufficiently, it should be installed quickly into the frame bore. Once the bushing is in position, it should be level with its upper surface. You can use a wooden Hammer to gently hammer on the upper part of your bushing until it’s fully put together.

(5) The bushing is able to be put together once the liner has been securing.

When replacing parts there are some parts that must be serviced.

1. When replacing the liner, you must also check the wear on the fixed cone, adjustable ring, as well as the locking ring threads. The most common causes of tooth thread wear are the frequent overloading and jumping the adjuster ring as a result of excess iron in the cone crusher.

2. If you notice that the guard on your counter appears be worn, replace it immediately.

3. In order to change the bronze bushing beneath the moving cone or eccentric bushing, it is important to first check the measurements of the cone’s inner and outer bushings. After that, install the new bushing. After installing the new bushing the new bushing must be chilled using liquid nitrogen or dry ice for at least two hours, before it can be installed inside the cone and the eccentric bushing, and it is not possible to install the bushing by hammering or pressing. To get rid of any scratches or debris, the outer walls of the eccentric bushing and the main shaft need to be cleaned prior to installing the dynamic cone assembly. When replacing the bronze bushings of the moving cone and eccentric bushing, before running the crusher, it should be broken in according to the operation procedures.

4. Examine the wear on the lower frame bar guard plate as well as the drive shaft frame guard plate , and the main frame guard plate and replace them if needed.

5. Examine all hydraulic hoses for leakage or damage, and replace them if necessary.

6. When umbrella teeth are of size crusher, the top and side gaps between the teeth need to be adjusted. The clearance of the tooth can be altered by either increasing or decreasing the shim of the lower thrust bearing.

7. Take care of the horizontal shaft blower filter to keep the filter from becoming blocked. Also, avoid dust entering the crusher and polluting the oil used to lubricate it.

8. Test the indicator light on the button box of the hydraulic station to check if it’s functioning normally.

9. If they’re not operating well, ensure whether the temperature sensor and pressure sensor, along with the device for counting gears, the material level meter sensor are working normally.

Method of Judgment for Wear

1. Once you’ve adjusted the crusher discharge opening then mark the support sleeve in a fixed location on the flange using the adjusting cap in order to show the initial position of the locking.

2, When the adjusting cap is adjusted to change the new locking position the adjusting ring is also adjusted in the vertical direction.

3. During normal operation, record the number of locking positions each time you first use the set. Track every position until you’re finished with the liner. Because there aren’t two crushing processes that are identical, the thickness, type and casting tolerances of liner used vary therefore it is difficult to predict in advance how many locking positions a set of liners can go through before being scrapped.

4. Note the number of teeth rotated after the liner is removed. To draw a short horizontal line with paint on the adjusting ring in order to show the position of the adjusting cap seal.

5. When you have installed the new liner, insist on making a record of the locking position to allow comparison, then the wear degree of the liner is assessed. Every when the discharge port is adjusted (reduced) and the adjusting rings hopper is moved down one time. When the liner is nearing its wear limit, marks painted on the adjusting ring are displayed. Since no two sets of liners will wear in the same manner, after a few sets of liners, a fairly accurate average position can be determined.

Cone crusher liners are worn out quickly. This permits timely detection of any equipment malfunctions and quick resolution. The other is to replace the faulty components in time, which is beneficial to the overall output of the production line. And also reduce the amount of maintenance time.

Cone crusher liner – locking device

Defects prior to modification

The cone’s dynamic cone liner designed for cones is assembled by tightening the cone’s dynamic head using spindle screws, which give it a pre-tightening force. After tightening the liner, the stop device is used to secure the liner onto the stop gear. In the end, zinc is poured to close the gap between liner & the carcass to cushion the impact of the liner on the carcass and stop it from shattering. But it has great defects and flaws in two areas.

(1) Because there is no testing tool to measure the preload between the cone head dynamic and the spindle thread the maintenance personnel are able to grasp it by experience in actual work, and the preload does not meet the requirements of the engineering when the stop gear’s stop gear as well as the gear of the cone head are joined.

(2) The direction of the rotation is clockwise (from top to bottom) in the case of a cone under no load or load, and counterclockwise if it is running with loads. There is a gap between the cone’s stopping gear and the stopper groove on the spindle. When the load is changed the cone head and the dividing disk move left and right relative to the spindle, causing the stopping gear as well as the spinning stop groove to wearout, thus expanding the swinging range of the cone head.

They can also cause some issues.

(1) (1). The liner is caused to break or loosen.

(2) increase wear on the cone body.

(3) Leakage of zinc may be a problem.

(4) Wear and tear of the main shaft surface and a shorter service time of the stop groove.

(5) make it more difficult and cost of maintenance.

(6) shorten the time frame for maintenance, thereby increasing the amount of work performed by maintenance workers , and hindering the normal operation of production. The dynamic cone liner locking mechanism must be modified.

Modification method

After long-term observation after a long-term observation, it was determined that the wear of the stop groove of the spindle was the direction of the cone head’s screwing. It was determined that it was caused by the stop gear. When the load is heavy of the cone its head is not able to be tightened, thus causing the wear on the stop groove as well as the stop gear. Then the transformation method is.

(1) Take off the stop gear. In the event of high loads the conehead and the distributor rotation automatically are tightened. If the load’s operation isn’t interrupted by the preload it is possible to tighten the conehead to meet long-term requirements.

(2) A fuse ring is also placed between the conehead and the pressure sleeves to permit the pressure to be released between the conehead as well as the liner plates to be released after the liner plates get replaced.

Modified liner locking devices stop wear on the liner and spindle threads, as well as liner damage. The cone head and spindle are fixed, so the liner won’t move relative to each other. This will reduce spindle thread wear. The liner is locked for longer, makes maintenance easier, reduces the amount of labor required by maintenance workersand ensures that production is running smoothly.