Grinding machining system

Abstract

The invention discloses a grinding machining system in the field of feed machinery. The system comprises a raw material sieve, a sieve-free grinder, a settling chamber, an auger conveyor, a lifter, a powder sieve and a powder collecting bin. The settling chamber is positioned below the grinder; a discharging port of the grinder is connected to one end of the settling chamber; the other end of the settling chamber is connected with an air inlet of a pulse dust catcher; an air outlet of the pulse dust catcher is connected with an inlet of a fan; the auger conveyor is positioned under the settling chamber; a discharging end of the auger conveyor is connected with the lifter; an oversize product outlet of the raw material sieve is conveyed to a feeding port of the sieve-free grinder through a pipeline; an upper-end discharging port of the lifter is connected with a feeding port of the powder sieve; an undersize product outlet of the powder sieve is connected with an inlet of the powder collecting bin; and an oversize product outlet of the powder sieve is conveyed to the feeding port of the sieve-free grinder through the pipeline. The system separates grinding from screening, is high in screening efficiency, is not influenced by a material circulation layer, can effectively reduce the overgrinding phenomenon, improves capacity and saves energy.

Description

technical field [0001] The invention relates to a processing system in the field of feed machinery, in particular to a crushing processing system. Background technique [0002] There are many forms of crushing equipment used in the crushing processing system of the feed industry. Among them, the most widely used is the hammer mill. The hammer mill includes the frame and the crushing rotor assembly. The crushing rotor assembly includes the rotor main shaft, hammer frame plate, pin shaft, spacer and hammer. The hammer frame plate is installed on the main shaft at a certain interval, and the two ends of the main shaft pass through The bearing seat is supported on the frame, and there are several pin shaft holes evenly distributed on the hammer frame plate. A sieve with dense meshes surrounding the rotor is arranged on the outer periphery, and the sieve surrounds a crushing chamber larger than the diameter of the rotor. The measure of the hammer mill to control the particle s...

AI Technical Summary

Problems solved by technology

[0007] 2. When the material is in high-speed centrifugal motion, it will form a circulation layer rotating along the screen surface. Under the action of centrifugal force, the large particles in the material will accumulate on the outer periphery of the circulation layer, while the small particles will accumulate in the circulation layer. In the inner periphery, large-grained materials block the mesh and prevent small-grained materials from passing through the sieve, reducing the efficiency of crushing and screening

In the case of small sieve holes, the circulation layer of materials in the hammer mill is more obvious, which is more likely to cause excessive crushing of materials and increase in material temperature, which greatly increases the energy consumption of crushing processing; in addition, it also makes the distribution of crushing fineness uneven etc.

[0008] 3. The material of the hammer mill rotates along the sieve and flies to the sieve at a high speed in a tangential direction, which not only increases the wear of the sieve, but also makes it more difficult for the material to pass through the sieve.

[0009] 4. The screening ability of the hammer mill is not as good as the crushing ability, and the smaller the sieve hole, the more serious the situation of screen blocking and over-grinding, the greater the waste of energy consumption, and the smaller the sieve hole, it cannot be crushed, resulting in the reduction of the capacity of the crusher. Further improvement has encountered a bottleneck, and the cost of crushing processing has increased

Images