The cone crusher’s liner plates, often referred to as. the wall of smash and crushing wall, has the purpose of lifting the grinding media, crushing ore, and protecting the grinding cylinder. Three factors should be considered when choosing the cone crusher liner such as output, power consumption, and wear resistance. The concept of maximum feed size as well as changes in particle size, distribution size, hardness, wear resistance, and other factors are the main criteria for selecting the liner. The longer the liner is, the greater the power consumption.

Cone Crusher Liner Plate Role

The purpose of the cone crusher liners is to protect the barrel from direct impacts and abrasion from the grinding body and the material, it can utilize its various working surfaces to modify the conditions of the grinding body to enhance the crushing effects of the day’s grinding on the material, increase 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 can be used by turning the tooth plate around or both lower and upper plates turned around when the wear does not exceed the level to be replaced. When the liner plate on the cone crusher is worn up to 65%-80 percent of its thickness or when the local wear depression deformation and rupture, then it must be replaced. After installing the liner plates, check whether the centers of their plates are correct. If the center isn’t right, it could result in collisions when moving, or an uneven size for the product, and cause the friction components within the machine to heat up and fail.

Cone Crusher Liners Materials

Cone crusher liners were used to be made of high manganese steel, modified high manganese steel carbon alloy steel as well as chrome cast iron. In order to extend the life of the liner plate, Hongxing Heavy Industry generally adopts manganese steel containing at least 12% manganese, which creates hardenability and wear resistance on its surface, even under a strong impact load.

Cone Crusher Liner Plate – Selection

Yield of liner plates: The production output of a crushing plant is mostly dependent on its yield. In accordance with this principle the liner plates of cone crushers are in direct connection to the crusher’s output. Therefore, the company that operates the crusher can earn fewer profits by having a higher liner plate output.

Liner plate power consumption: The more liner plates, the higher the power usage. 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. Users must select the appropriate liner plate according to their requirements.

The wear resistance of the liner is determined by the various materials used in the manufacture of the liner, their wear resistance can be different The liner is typically susceptible to impact that is strong which can cause significant wear that will cause uneven size of the product and productivity decrease. This can result in smaller product sizes and lower productivity. It could cause economic loss to users. Thus, the users must be attentive to the wear resistance of the crusher liners plate when selecting it.

Cone Crusher Liner Plate Installation

(1) Install dry ice inside the bore of the bushing that is to be put in place so that the diameter of the bushing is reduced due to the cooling. A small amount of packing can be added to the bushing to make total contact between dry ice and the bushing.

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

(3) The cooling time is two hours. To check if the bushing is sufficient cooled, check the diameter.

(4) When the bushing has been sufficiently cooled, it should be installed quickly into the bore of a frame. After the bushing has been put installed, it must be in a straight line with its upper side. If difficulties arise during assembly, a wooden hammer may be used to hammer gently and evenly over the top of the bushing until the entire bushing is firmly seated.

(5) After the bushing has been put in its place The liner is usually secured using molten zinc alloy filler.

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

1. When replacing the liner, you should also examine the wear of the cone’s fixed cone, the adjusting ring and locking ring threads. The most common causes of tooth thread damage are frequent overloading and jumping of the adjust ring due to excessive iron inside the cone crusher.

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

3. When replacing the bronze bushing beneath the cone that moves and the eccentric bushing, the diameter of the moving cone and the inner diameter of the eccentric bushing need to be inspected first to determine whether they are in compliance with the standard requirements, before installing the new bushing. The new bushing should be cooled using dry ice or liquid nitrogen for at least 2 hours prior to being put in place. It cannot be used to hammer or press. To get rid of scratches or debris on the outside of the eccentric bushing and the main shaft need to be cleaned prior to installing the dynamic cone assembly. If the crusher is operating the bronze bushing and eccentric bushing must be changed.

4. If required Replace the main frame guardplate, drive shaft guard plate or lower frame bar guard plates.

5. Check all hydraulic hoses for damages or leaks, then repair them if they are damaged.

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

7. To avoid dust getting into the crusher and contaminating the oil, keep the filter in the horizontal shaft blower.

8. To check whether the indicator light on the hydraulic station buttonbox is functioning, try it.

9. Check whether the pressure sensor, temperature sensor gear counting device and material level meter are functioning normal. If they’re damaged, they should be replaced.

Method of Judgment on Wear

1. After you have altered the opening for the crusher discharge then mark the support sleeve in a fixed position on the flange using the adjusting cap in order to show the initial position of the locking.

2. When the adjusting cap has been adjusted to rotate to in the new locking direction, it is adjusted vertically.

3. In normal operation, take note of the number of locking positions each time you are using the first set. Be sure to record every position until you’re finished with the liner. Since there will not be two crushing processes that are identical, the material, thickness and casting tolerances of the liners used range widely and it’s impossible to predict in advance the number of locking positions a set of liners can pass through before being scrapped.

4. Note the number of teeth turned after the liner has been removed. To locate the position of the cap seal, draw a horizontal line using paint on the adjusting rings hopper.

5. After installing the new liner make a note of the locking position for analysis, and then the wear rate of the liner will be determined. The adjusting ringhopper is moved down each when the discharge port gets reduced. The adjusting ringhopper indicates the wear limit of the liner by marking the marks. Since the liners of no two sets will wear in the same manner, after a couple of sets of liners, a fairly accurate average location can be established.

Cone crusher lines can be damaged quickly. This allows for timely detection of equipment failures and prompt solution. The second is to repair the damaged components in time and improves the efficiency of the entire production line. This also reduces maintenance time.

Cone crusher liner – locking device

Defects before modification

The cone dynamic cone liner that is used for cones is assembled by tightening the dynamic cone head using the spindle screws, which give it the pre-tightening force. After tightening the liner, the stop gear is used to fix the liner onto the stop gear. Finally the zinc is poured in order to close the gap between liner & the carcass to absorb the impact of the liner on the carcass and prevent it from breaking. There are two major flaws.

(1) Since there is no test tool for the preload that is between the dynamic cone head and the spindle thread maintenance personnel learn it by experience in actual work, and the preload does not reach the technical requirement when the stop gear’s stop gear and the gear of the cone head are meshed.

(2) If the cone is not under load, it turns clockwise (from top to bottom) and counterclockwise (from bottom to the top) in the event that it is in the process of being loaded. And there is an in-between between the cone’s stopping gear and the stopper groove on the spindle. If the load condition changes the cone head as well as the dividing disk move left and right in relation to the spindle, which causes the stopping gear and the spinning stop groove to wearout, which increases the range of swing of the cone head.

And these defects can cause some issues.

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

(2) (2). aggravate the wear and tear of the body of the cone.

(3) Zinc leakage may occur.

(4) Wear on the main shaft, and an accelerated service life for the stop groove.

(5) raise the difficulty and expense of maintenance.

(6) Reducing the maintenance cycle through increasing the intensity and restricting production. The cone liner locking dynamic mechanism needs to be changed.

Modification Method

A long-term study revealed that the cone head screwing direction was affected due to the wear in the stop groove. Thus, it was judged that it was caused by the stop gear. With the high load operation of the cone its head is not able to be tightened which causes wear of the stop groove and the stop gear. Then the transformation method is.

(1) Eliminate the stop gear. In the event of large loads the conehead and distributor rotation automatically will tighten. If the load’s movement is not interrupted by the preload it is possible to tighten the conehead to meet long-term needs.

(2) Additionally an ring of fusion is placed between the cone head and the pressure sleeve in order to help in reducing the pressure between the cone head and the liner plate. This can be taken off when the liner plate has been changed.

Modified liner locking devices prevent spindle thread wear and liner loss. The cone head and spindle remain in a fixed position and the liner will not be able to move in relation to the spindle. This reduces wear on the spindle’s threads. This keeps the liner in place for a longer time, makes maintenance easier, decreases the labor burden for maintenance personnel, and makes sure that production is running smoothly.