How to self-check and repair if the jet mill fails
The jet mill has a wide range of applications and high fineness of the finished product. Typical materials include super hard diamonds, silicon carbide, metal powder, etc. Ordinary air is replaced with inert gas, such as nitrogen and carbon dioxide gas, so that the machine can be protected by inert gas, which is suitable for crushing and grading treatment of inflammable, explosive, oxidizable and other substances.
Too much, too little or aging lubricating oil in the bearings of jet mills is the main cause of bearing overheating and damage. Therefore, the lubricating oil is used according to the filling quantity. Generally, the lubricating oil uses 70% of the space, too much or too little. Conducive to bearing lubrication and heat transfer, extending the service life of the bearing. The matching bearing cap is tight with the shaft. Too tight or too loose matching between the bearing and the shaft will cause the bearing to overheat. However, by operating the shredder equipment in this way, the frictional noise and movement become more obvious, so the bearing should be disassembled, the friction part should be completed, and then reassembled as needed.
The pulverizer, cyclone separator, dust collector, and induced draft fan form a complete pulverization system. The dry compressed air is injected into the crushing chamber through a high-speed Laval nozzle. When the high-pressure air impacts the material, it repeatedly collides, rubs, shears, and crushes. The crushed material interacts with the upward air movement. The exhaust fan rotates at high speed, and the turbine is powerful. Under the action of the centrifugal force, the particles that meet the requirements enter the cyclone separator and dust collector through the classification wheel to collect, and the coarse particles return to the crushing zone to continue crushing.
The jet mill is a device that uses high-speed airflow to achieve ultra-fine grinding of dry materials. It consists of a pulverizing nozzle, grading and other components. The material enters the pulverizing chamber through a screw feeder, and the compressed air enters at a high speed through a special configuration of supersonic nozzles. In the crushing chamber, the material is repeatedly impacted, collided and crushed by the high-speed airflow.
Nowadays, jet mills are frequently used, and there are many types of popular mills on the market. Therefore, they have various problems. When encountering these problems, everyone always waits for maintenance personnel to inspect and repair, which is costly and troublesome. If we can perform self-examination and repair at this time, it will be much more convenient.
First, check the power socket, plug, and power cord for oxygen loss or breakage. If there is no such problem, you can plug in the power test machine. When the motor is energized and does not rotate, the wheel can be turned by lightly turning it by hand. It can be concluded that one of the two starting capacitors of the device has failed. If the discharge spark can be emitted and there is a loud “pop” sound, it means that the capacitor can be used; if the spark and noise are weak, it means that the capacity of the capacitor has decreased, and it needs to be replaced or added with a small capacitor. If the capacitor of the jet mill is damaged and short-circuited, this method cannot be used, and it must be replaced with a new product of the same specification to be repaired.