Working principle: Edge transmission is usually used. The material to be ground enters the air-swept grinding chamber through the feeding device. The motor drives the cylinder to rotate through the reducer and large and small gears. The grinding media and materials in the cylinder are During the rotation process, the material is brought to a certain height by the friction and centrifugal force caused by the rotation of the cylinder, and is thrown down and hit by the grinding medium. The crushed material enters the next process through the discharging device. . Structural and performance characteristics:
1. The air-sweeping mill uses three-dimensional design and simulation calculations to optimize the structural design of the main components; it uses materials and processing techniques with excellent performance to ensure smooth operation and reliable use; maintenance operations Convenient and greatly reduces the amount of maintenance.
2. The feeding device consists of a feed port, an air inlet and a bracket, with a lining plate inside the port.
3. The transmission device is mainly composed of a motor, a transmission shaft, a reducer, a coupling and ancillary equipment. The transmission mode is edge transmission, that is, the small gear on the transmission shaft and the large gear fixed at the end of the cylinder. The gears mesh and drive the mill to rotate. During installation, it must be ensured that the force exerted by the small gear on the large gear is always upward.
4. The main bearing adopts sliding bearing. The mill is supported on two main bearings through a hollow shaft, and the entire weight of the rotating part is borne by the main bearings. The main bearing consists of a main bearing bush, a bearing seat, a bearing cover and a lubrication and cooling system. The main bearing bush is the most important part of the main bearing. The bottom surface of the bearing bush is spherical and is installed on the concave spherical surface of the bearing seat. The tile surface is made of Babbitt alloy. , so the bearing has the advantages of compliance, good embedding, easy running with the journal, and strong anti-gluing ability. Sliding bearings have good strength, plasticity, polymerization, friction reduction, wear resistance, lubrication and heat transfer properties, and are simple and convenient to replace. They can meet the good lubrication requirements of the main bearing and adapt to the low-speed and heavy-load work of the ball mill. environment.
5. The rotating part is composed of a cylinder and grinding head made of high-quality carbon steel plates coiled and welded. The cylinder is the main body of the mill and one of the main working parts of the mill. The material is impacted and ground by the grinding body in the cylinder and ground into fine powder. At present, the company's cylinder is rolled from high-quality steel plates, which has good machinability, weldability, wear resistance and fatigue resistance. It meets the requirements of high cylinder strength, good plasticity and certain impact resistance. requirements, it is the best choice for current cylinder manufacturing. The grinding head is mainly composed of an end cover and a hollow shaft. It is one of the main parts of the mill and bears the dynamic load of the entire mill. Our company divides the end cover and the hollow shaft into two parts and assembles them together. The end cover is made of high-quality carbon steel, and the hollow shaft is cast and formed. They are processed separately and assembled together with bolts. The end cover is machined from a single piece of thick steel plate. The quality of the end cover can be guaranteed. There are no casting defects in the casting, ensuring safety and reliability in long-term use.
6. The discharging device consists of a discharging pipe, a bracket and related accessories. The main bearing and transmission gear are key components of the ball mill, and their working stability directly affects whether the ball mill can operate normally. The company has a strong R&D team that uses finite element analysis software to analyze the forces on sliding bearings and continuously optimizes them to increase the service life of the bearings. It conducts static, modal and contact analysis on the ball mill gear transmission pair to find out the problems of the gears. Weak links in design and operation are improved and optimized to minimize gear wear.