With the rapid development of China's construction, cement, metallurgical and other industries, the use of crusher equipment has gradually expanded. However, because the customer often neglects the maintenance of the bearing, the machine malfunctions and cannot operate normally. Here are some tips for extending the life of the crusher bearings for your reference.
1. First check the number of parts before installing the crusher equipment, and check the damage caused by the machining surface and thread of each part during loading and unloading.
2. When installing the crusher, apply dry oil on the fixed contact surface and apply thin oil on the movable surface. In particular, after the bearing is installed, the outer ring must be inclined to apply the lubricant for the bearing.
3. The lubricant coating of the bearing is also very particular. When the grease is lubricated, it covers all the rollers. After the coating, the position of the outer ring is restored. It is also necessary to cover the dust with a plastic film.
4. Pay attention to cleaning the bearings during daily use. Put the bearings into the oil first, then brush the dirt on the bearing surface with a brush, then properly heat the oil, and then clean the balls and holes inside the bearing in detail. .
5. After the crusher has been working for a period of time, it is necessary to carry out regular inspections. Remove the bearing and if the bearing wears less, it can be turned on the lathe to the correct geometry. At the same time, pay attention to the gap between the eccentric shaft and the bearing bush and the mandrel and the bearing bush. If it exceeds 1.5 times, it should be replaced or padded.
The impact crusher is a new type of medium and fine crushed stone equipment developed in the 1990s. It is also widely used in the world to replace the cone crusher, the roller mill and the ball mill. The structure is novel, unique and balanced. The energy consumption is small, the output is high, and the crushing ratio is large. The device is small in size, easy to operate, and easy to install and maintain. It has a shaping function, the product is cubic, and the bulk density is large. During the production process, the stone material can form a protective bottom layer, and the body is wear-free and durable. A small amount of wear-resistant parts are made of special hard and wear-resistant materials, which are small in size, light in weight and easy to replace. Let us introduce the maintenance, repair and precautions of the impactor rotor bearing of the impact crusher.
When selecting the model of the rotor bearing, it is necessary to correctly select the double-row radial spherical roller bearing to have the advantages of strong bearing capacity and good self-aligning performance, so this kind of bearing is often used as the rotor bearing in the selection. In addition, the calculated life of the selected bearing should be 5000~10000h.
To improve the balance accuracy of the rotor, the impact crusher has a large rotor mass and a high rotational speed. The casting deviation of the rotor body and the mass deviation caused by the installation of the hammer will cause an unbalanced centrifugal force when the rotor rotates. This centrifugal force causes the machine to be forced to vibrate, causing damage to the bearings and other parts, so the rotor of the crusher must be balanced. If the diameter of the rotor body is small, the mass of the blocking plate on both sides of the rotor body can be changed to balance. If the diameter of the rotor body is large, the weight can be welded to the outer wall of the rotor. In order to prevent the counterweight from falling during the vibration process, several rows of grooves can be cast in place, the weights are embedded therein, and then welded, which is both firm and beautiful.
Reasonable adjustment of the mutual cooperation relationship The impact of the broken rotor bearing is mainly the impact load, the magnitude of the load on the rolling element is different, and the rolling element under the combined action of the impact load is the most stressed, inside and outside. The ring raceway is also the most stressed when it comes into contact with the rolling elements. Since the inner ring keeps rotating during the working, the contact points on the track will be circulated from the maximum force to the minimum force, so it is necessary to make the inner ring fit tightly, so that no point will stay in the force. The phenomenon at the maximum point. The outer ring is different, the outer ring is relatively fixed, and the maximum force will stay at a fixed point. Therefore, if the outer ring is loosely fitted, it may have a small amplitude movement under the impact force, thereby increasing the maximum force. Point, and extend the life of the outer ring.
To improve the stress condition of the crusher bearing, the impact load acting on the bearing depends on the impulse acting on the rotor and the support flexibility of the bearing housing. Increasing the support flexibility of the bearing housing will reduce the impact load on the bearing. To this end, we can add a rubber plate of appropriate thickness between the bearing housing and the support frame to improve the support flexibility of the bearing housing. Due to the addition of the rubber sheet, the support flexibility is increased, thereby absorbing a part of the vibration energy, improving the bearing condition of the bearing and achieving the purpose of prolonging the service life.
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Tag: Bearing life Rotor Gravel equipment Spherical roller bearing Impact break
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