The reason why the large and small bevel gears of cone crusher frequently hit teeth

Product introduction:https://www.lvssn.com/crusher/Cone-crusher.html

Cone crusher work, by the motor through triangle, big belt wheel, a transmission axis, a small bevel gear, bevel gear drive the eccentric sleeve, drives the moving cone rotary pendulum movement, makes the broken wall surface and sometimes near and sometimes leave the surface of the rolling mortar wall, which make the material of the cone and cone annular crushing cavity continuously hit, extrusion and bending and crushing.Among them, small bevel gears and large bevel gears are important transmission components.Cone crusher often appear teeth, wear serious phenomenon, cone crusher large, small bevel gear frequently teeth reasons
 

1. Get stuck

In the crushing chamber of the cone crusher, non-breakable material (over-iron) is entered, and the non-breakable material entering the cone crusher exceeds the maximum size of over-iron of the cone crusher, which causes the equipment to get stuck.After the cone crusher is stopped by blocking materials, the operator, in order to shorten the cleaning time, starts the motor with heavy load for several times and causes the drive bevel tooth inside the cone to be broken due to overload fatigue.
 

Cross the iron card dead solution

(1) adjust the current of the protection device of the cone crusher so that it cannot be forced to start or temporarily protect the trip under heavy load.

(2) a permanent magnet lifting device is installed on the belt conveying materials into the cone crusher to effectively prevent the cone from breaking through the iron.

 

2. Poor lubrication of the cone crusher

Cone crusher in the process of operation, when the water seal dustproof device seal is not strict, will make a large number of dust into the body of the lubricating oil, so that the lubricating oil quickly become poor, resulting in poor lubrication, causing the size of bevel gear teeth, wear serious.
 

Poor lubrication solution for cone crusher

Replace lubricating oil in time to ensure good lubrication of equipment.Check the operation of oil pumps, filters, coolers, valves and pipelines, as well as the oil pressure and temperature of the oil and thin oil lubrication system.

 

3. Large and small bevel gears are not meshing properly

The installation of bevel gears of large and small size is the same as that of meshing and normal gears, which destroys the right meshing conditions of a pair of gears, causing additional impact vibration and additional sliding wear of gears in the process of operation, resulting in shortened service life of gears, or even tooth beating.
 

Large, small bevel gear meshing improper solution

Make the bevel gear meshing correctly, eliminate the reciprocating sliding and additional impact between the gears, reduce wear, prevent teeth.

 

4. Large and small bevel gears have improper meshing clearance

When the gear is installed, the gap between the tooth top and the tooth side is adjusted improperly, or the contact surface between the upper disk and the eccentric sleeve appears inclined groove after the thrust disc is worn, thus affecting the meshing clearance between the gears, and it is easy to produce tooth striking phenomenon in the production of the cone crusher.
 

Large, small bevel gear meshing clearance improper solution

Regularly check the meshing clearance of bevel gears and the matching clearance between eccentric shaft sleeve and rack bush, and replace the eccentric shaft sleeve or rack bush with excessive wear in time to ensure the clearance within the specified range.
 

5. Gear machining accuracy is not high

Gear machining accuracy is not high, resulting in the phenomenon of teeth in the work.
 

Gear machining precision is not high solution

Improve the processing accuracy of bevel gear of cone crusher, ensure the contact surface is even, improve the service life, avoid the root cutting teeth.

In the work of the cone crusher, must prevent iron, ensure good lubrication of equipment.In addition, in the selection of large and small bevel gear, should pay attention to the screening of manufacturers, select the gear with high machining accuracy;Attention should be paid to the selection of suitable meshing clearance during installation to avoid the possibility of tooth beating and root cutting from the source, so as to ensure the efficient operation of the equipment and improve the production efficiency.

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Solution for rotor bearing failure of hammer crusher

Product introduction:https://www.cementepc.net/crusher/Hammer-crusher.html

Hammer crusher is the use of high-speed rotating hammer head on the rotor body to break the material, its rotor bearing in the work to bear a lot of cyclic impact force.Due to the poor working conditions of the rotor bearing, coupled with the design, manufacture and use of improper reasons, the bearing service life only a few months, hammer crusher rotor bearing failure solution.
 

1. Choose reasonable tolerance fit

Under normal temperature, hammer crusher rotor bearing for surplus to cooperate, but when the bearing working temperature is above 60 ℃, that is converted to clearance fit, the journal of relative movement between the inner ring, the relative movement of the friction heat on the one hand, fuelled the rise of temperature of the bearing, on the other hand shaft neck and adhesive wear lead to premature failure of the bearing.

In order to keep the interference fit between the inner ring and the journal at a higher temperature, the tolerance fit of the journal should be selected by considering the thermal expansion of the inner ring.

On the one hand, there is enough expansion space for the outer ring when the bearing overheats. On the other hand, it can also improve the stress state of the outer ring and extend the service life of the outer ring.

2. Strengthen sealing and lubrication

Timely and correct lubrication can greatly reduce the friction resistance of hammer crusher rotor bearing and restrain the temperature rise of hammer crusher bearing. In view of the working characteristics of high-speed and heavy load of rotor bearing, molybdenum disulfide compound calcium grease (zfg-3e) should be selected to lubricate the bearing.In addition, add grease every 8 hours, change oil every 3 months, and clean the bearing and seal ring and cover with gasoline or kerosene, and timely replace the labyrinth seal cover with excessive wear gap on the bearing seat of hammer crusher.

3. Improve bearing stress

The impact load acting on the hammer crusher bearing depends on the impact on the rotor and bearing bearing bearing flexibility, increase bearing bearing bearing flexibility, will reduce the impact load acting on the bearing.Therefore, an appropriate thickness of rubber plate can be added between the bearing seat and the supporting frame to improve the bearing bearing flexibility.Because add rubber plate, increase flexibility, thereby absorb a part of vibration energy, improve the hammer crusher bearing stress condition, to extend the service life of the purpose.

4. Balance the rotor during assembly

The mass of hammer crusher rotor is large and the speed is high, the casting deviation of rotor body and the mass deviation caused by the installation of hammer head will cause unbalanced centrifugal force when the rotor rotates.This centrifugal force causes the hammer crusher to produce forced vibration, causing damage to bearings and other machinery.Therefore, the manufacturer should perform balance test on the rotor to meet the requirements of the standard.When installing the hammer head, two hammer heads with the same mass should be assembled in two positions with mutual symmetry, and the gravity of the hammer head should be well matched to balance the gravity of the hammer head, the gravity of each row in the circumferential direction of the rotor should be equal, and the axial gravity should be evenly arranged, so as to achieve the balance requirement.Replacement of hammer crusher new hammer head should also pay special attention.

The above is only to improve the hammer crusher rotor bearing early failure of part of the method, we should choose a reasonable scheme according to the production environment, if you have any questions can be at any time and we leave a message.

The page source:https://www.cementepc.net/productknowledge/Solution-for-rotor-bearing-failure-of-hammer-crusher.html