Design and calculation of ultrafine pulverizer

　　The dynamic balance of the ultrafine pulverizer rotor, azimuth and balance weight. The main applied pulverization mechanism determines the characteristics of a wide range of applications, high finished products, typical materials are: super hard diamond, silicon carbide, metal powder, etc., high purity requirements: ceramic color, medicine, Biochemical, low temperature requirements: medicine, PVC. By change the ordinary air of the gas source to nitrogen, carbon dioxide gas, etc., the unit can be made into an inert gas protection device, which is suitable for the pulverization classification of materials such as flammable explosive, easy oxidation. The main applied mechanism of ultrafine pulverizer determines its application range, high finished product, typical materials are: super hard diamond, silicon carbide, metal powder, etc., high purity requirements: ceramic color, medicine , Biochemical, low temperature requirements: medicine, PVC. By change the ordinary air of the gas source to nitrogen, carbon dioxide gas, etc., the unit can be made into an inert gas protection device, which is suitable for the pulverization classification of materials such as flammable explosive, easy oxidation. The ultrafine pulverizer is an apparatus for ultrafine pulverization of dry materials using air separation, heavy polishing, and shear. It consists of a cylindrical crushed chamber, a polishing wheel, a polishing rail, a fan, a material collection system, and the like. The material enters the cylindrical pulverizing chamber by the feed opening, and is crushed by the polishing wheel that is circumferential movement along the grinding rail, and dissensibly. The pulverized material brings out the pulverizer through the negative pressure air flow caused by the fan, into the material collection system, filtered through the filter bag, the air is discharged, the material, the dust is collected, and the pulverization is completed. In addition, it has a high balance accuracy, and the operator can complete the whole process of dynamic balance to a certain extent. If there is no dedicated dynamic balancer, as long as there is a small measurement instrument such as micrometer, vibration meter on the homemade dynamic balanced bracket, it is also possible to use an eight-point test weight turnover method to find a balance, but the requirements for the operator are slightly higher. . When using this method, it is generally measured directly on the bearing of the machine itself. The initial amplitude of the rotor on both sides of the bearing is first measured with a vibrator or a thousand-fold, and then the balance is obtained from the side of the initial amplitude. The design calculation of the ultrafine pulverizer is required to require a gesture of the pulley. Because it is a static connection, select a normal flat key. When the shaft diameter is D-48 mm, H-12-8, see Table 060-1. Reference gear wheel width 10 to 125 mm, ordinary flat long series, L? 132 mm. Strength calibration, due toUse a static connection, only check the extrusion strength, the D-axis diameter, the mm, the contact height, the height of MM, the height of MM (H <2k)、mmWorking length, l key, mm, t moment and N / mm. The allowable extrusion stress MPa shows that the allowable extrusion stress of the material is meets the strength requirements. P3.4.3 connect the rotating body. Its main working component is the high-speed rotating rotor with plate hammer, which is directly or indirectly installed on various forms of reaction plates on the casing. Pay attention to the balance of the rotor in the design, installation and maintenance of the rotor. Otherwise, the rotor components will cause large vibration, generate additional dynamic load and damage the equipment Under normal working conditions, the bearing temperature rises too high, shortens the service life, and even causes crack damage to some parts. Therefore, rotor dynamic balance must be considered in Aeroengine Design.