As we all know, the main factors affecting the weight and cost of coal sizer crusher are two "tooth rollers". In order to improve the "biting" performance which has a direct impact on the production capacity, the companies and manufacturers of coal sizer crusher all adopt the scheme of increasing the diameter of tooth rollers. This increases the size of the crusher and the weight of the machine, increases the manufacturing cost, and increases the maintenance cost and workload of the user. The design of a new way, in improving the crusher "biting" performance and greatly increase the production capacity at the same time, the size of the crusher and the weight of the equipment is smaller. According to this design idea, a new coal sizer crusher was designed. This design concept is unique and opens the thinking space of coal sizer crusher design.
coal sizer crusher is designed on the basis of the coal sizer crusher verified by the production of long journal Mountain, using new design ideas. The design goal is to make the performance of the equipment close to or reach the performance index of the heavy coarse coal sizer crusher. And the weight of the equipment is not increased, to achieve a higher cost-efficiency ratio, in order to meet the mountain as a mobile coarse crusher. In order to improve the "biting in" performance, we increase the center distance of the tooth roll from 980m of 2P℃980 to 1150m. General double-toothed stick crusher a roll tooth tip to extend into the tooth valley of another roll, such as 2G℃980 two roll tooth tip coincide 100m? There is a 70m gap between the tooth tips of the two rollers. The crushing principle is: the two crushing rollers only bear the crushing of large materials, from the two tooth rollers fall more than 250 materials by the fixed adjustable rack under the two tooth rollers, commonly known as "crushing rod", generally coarse crushing machine is set up between the crushing rod and tooth rollers, the material through the crushing rod is 250 qualified products.
2 Analysis of design parameters The structure and performance parameters of the double-toothed rod Crusher designed by us and the previous old coal sizer crusher, comparison of coal sizer crusher) the crushing ability is enhanced, and can break iron ore. 4) the discharge lumpiness is reduced by 50m to 250m④ the output is increased by 4 times, and the power is increased by 2000t/h, which is 275 times of that of 2G℃980. Compared with 2P℃980, the weight of the six devices increased by 9t. It can be seen that the center distance of the large tooth roller not only greatly improved the yield, but also enhanced the crushing capacity, while the weight of the device only increased by less than 2%. 2.2 Comparison with coal sizer crusher) The crushing capacity was enhanced to break iron stone. 2) The discharge lumpiness is reduced by 50m. 3) The output is close to ④ under the condition of the same equipment power, the weight of the equipment is reduced by 433t. It can be seen that after the center distance of the big tooth roller, the coal breaking output reaches 95% of the maximum output and. The weight of the machine is only 5696, which greatly reduces the weight and manufacturing cost of the main engine: 2. The output of the crushing iron ore is 1400/D, which enhances the crushing capacity and broadens the application field of the crusher: 3. The fixed or adjustable crushing rack set under the two tooth rollers is used to ensure the granularity of the discharge. When the crown or broken rack is worn, the user can repair by surfacing. Because the feeding size of the equipment is 1000m, it is not suitable for the coarse breaking of large Luotian coal mine. It can be used for the coarse crushing of medium and small open-pit coal, iron ore and underground mining. To sum up, this design idea is feasible and can provide a new design idea and way for the application and development of coal sizer crusher in China.
Due to the harsh working conditions of coal sizer crusher, a large amount of crushing material dust is easy to enter into the bearing chamber of the crushing roller, which will integrate and dry with grease and lead to bearing failure, which directly affects the service life of the equipment, which not only brings the user the loss of production and maintenance, but also occupies more spare parts funds. Therefore, in the design of coal sizer crusher, we adopt the following methods to solve the sealing and lubrication problems of crushing roller bearings. The crushing roller bearing adopts the "labyrinth ten oil seal" sealing structure, and provides grease between the labyrinth and the oil seal with quantitative constant pressure when the automatic dry oil lubrication station is fixed. The excess grease is extruded through the maze, so that dust can be prevented from entering the bearing chamber, and the lubrication of the bearing is also realized. It should be noted that the oil discharge hole must be added at the bottom of the bearing end cover to discharge the silted grease regularly. To ensure the cavity grease clean. Bearings are lubricated with "lithium molybdenum disulfide grease". In the case of good sealing, the injection of this kind of grease can generally run for 6 to 12 months. We use a monthly supplement of grease. It can be seen that the automatic dry oil lubrication station is actually mainly set up for bearing seal, this type of structure is currently used for the first time in the world.