Typical failures of hydraulic cone breakers

Hydraulic cone crusher and jaw crusher, impact crusher and other more traditional crusher, compared with 

the structure is much more complex, with more sophisticated, the processing requirements are also higher,

 at the same time because of its hydraulic system and lubrication system is also very complex. Once a

 failure occurs, it needs to be shut down for maintenance and processing, which will have an impact on

 production.

1、Adjustment ring jumping

Adjustment ring jumping refers to the abnormal jumping of the part above the adjustment ring during

 the crushing operation of multi-cylinder crusher, and it keeps hitting the frame. There are two main 

reasons for this:

① Overload. The powder in the feed material is too much and wet, sticky, blocked in the crushing 

chamber can not be discharged properly resulting in overload; the discharge opening is adjusted too 

small, not adapted to the current hardness and size of the material, resulting in overload.

② Insufficient pressure of release cylinder. According to Newton's third law, in fact, the pressure of the 

release cylinder determines the maximum crushing force of the crusher, when the pressure of the release

 cylinder is insufficient, the maximum crushing force is reduced, and the constant occurrence of ring

 jumping is in fact the constant occurrence of over-iron or overload protection of non-normal factors.

2、Eccentric sleeve / cone liner erosion

Eccentric sleeve erosion is a common multi-cylinder cone crusher is a more serious failure, eccentric 

sleeve is driven by the cone to do the rotary oscillation crushing movement of the direct contact parts,

 as long as the crusher in the work, the eccentric sleeve will be friction with the dynamic cone liner high

 intensity, so the only guarantee of adequate lubrication in order to avoid their erosion. Therefore, once

 this failure occurs, it must be a lubrication problem, which may be lubricant leakage, lubrication pipeline

 blockage, and possibly insufficient lubricant pressure.

3、Loose fixed cone

Loose fixed cone will greatly affect the crushing effect, and allow it to develop will greatly damage the 

crusher, and may even be directly scrapped, and the causes of loose fixed cone are as follows:

①The threads of the adjusting ring and the fixed cone are worn out, resulting in that they can not be

 properly engaged and locked;

② The crusher carries out crushing operation under insufficient pressure of the locking cylinder;

③ The liner of the moving cone or the fixed cone is so thick that the threads between the fixed cone and

 the adjusting ring do not engage sufficiently at the same discharge opening.

④ The discharge opening is so large that the thread engagement between the fixed cone and the

 adjusting ring is insufficient.

4, drive shaft bushing erosion

Transmission shaft bushing that is the sliding bearings of the drive shaft, bearing the drive shaft about

 800RPM high-speed high-intensity rotary friction, lubrication is not in place in the case of a short

 period of time to produce a huge buildup of heat, so that the bushing erosion failure. The reason is

 basically not enough lubrication, lubricant leakage or drive shaft lubricant road blockage.

5、Material particles pollute the lubrication system

Many parts of the multi-cylinder hydraulic cone crusher that need to be lubricated are made of copper 

alloy, which is relatively soft in texture, and at the same time, they are very important, and the cleanliness

 of the lubricant needs to be guaranteed. Therefore, the crusher also has high requirements for sealing, 

under normal circumstances, the outside world dust will not enter the internal crusher. Possible reasons

 are: drive shaft box blower failure, lubrication system ventilator failure, reservoir cover seal broken, 

drive shaft or cone seal broken.

6、Lubricating oil leakage

The lubrication system can be regarded as the lifeline to guarantee the long-term stable operation of

 multi-cylinder hydraulic cone crusher, once the lubricant is insufficient, it will cause some serious 

crusher failures, and the lubricant leakage is a very common failure in the actual operation of the crusher

, which is caused by the following reasons:

① Crusher lubrication pipe is damaged by material scouring due to long-term bending or improper 

protection, resulting in lubricant leakage;

② crusher lubrication pipe interface due to collision or vibration loose;

③ Damage to the T-type U-type sealing ring inside the crusher, failure of the sealing O-ring in the 

transmission part, or failure of the sealing in the lubrication station.

7、Excessive vibration

Excessive vibration of the crusher will affect the stability and safety of the crushing table, especially the 

steel structure of the table, and at the same time, severe vibration will cause many connectors, 

transmission parts, joints and pipelines to come loose, thus causing other failures. Causes of excessive 

vibration are:

① Counterweight or guard plate wear, rotation imbalance;

② large bevel gear and drive pinion gear tooth root clearance is not correct, resulting in improper gear 

mesh;

③ The drive shaft is bent or the speed of the drive shaft is too high;

④ unbalanced crusher foundation, bearing imbalance.

In addition to pay attention to the maintenance of cone breakers in production to reduce the failure rate, we should also pay more attention to the purchase of equipment, and choose manufacturers with guaranteed equipment quality.