Hammer leaf type drum sieve pulverizing machine and pulverizing method

Abstract

The invention belongs to crushing machinery, which more particularly relates to a hammer drum sieve crushing machine and a crushing method thereof which are applicable to food, feed, chemical and other fields, the crushing machine consists of a base (17), an upper rack (4), a main motor (15), a coupling (14), a shell body (1) of the crushing machine, a main shaft (10) of the crushing machine, a rotor (8), a hammer (7) and a material guide plate (5), and the crushing method is as follows: raw materials enter the crushing machine, qualified small particles penetrate a fixed sieve plate of the crushing machine under the high-speed hit of the hammer on the rotor, the qualified small particles which are not timely discharged and the unqualified large particles are thrown to the sieve surface of a rotating drum sieve by the rotor at a certain speed, thereby leading the working sieve surface to always maintain the high efficient sieving ability which is equivalent to increasing several times of the effective sieving area, improving the sieving ability of the original sieve plate of the crushing machine, improving the crushing efficiency and ensuring the quality of crushed materials.

Description

technical field [0001] The invention belongs to a crushing machine, in particular to a hammer-type trommel grinder and a crushing method suitable for the fields of grain, feed, chemical industry and the like. Background technique [0002] At present, the hammer mill with sieve is one of the most widely used crushing models in production. The chips are fixed or vibrated within a certain range. Their disadvantage is that they are only suitable for coarse crushing, and the effect is poor for fine crushing. Due to the action of centrifugal force, the material is separated from the impact of the hammer, and soon forms a material ring inside the screen. The quality of the coarse and fine materials is different, resulting in the layering of the material ring, and the coarse particle layer is close to the screen. On the sheet side, the fine grain layer is covered on the coarse grain layer to form a circulation layer. In the case that the circulation layer of the material cannot be...

AI Technical Summary

Problems solved by technology

[0002] At present, the hammer mill with sieve is one of the most widely used crushing models in production. The chips are fixed or vibrated within a certain range. Their disadvantage is that they are only suitable for coarse crushing, and the effect is poor for fine crushing. Due to the action of centrifugal force, the material is separated from the impact of the hammer, and soon forms a material ring inside the screen. The quality of the coarse and fine materials is different, resulting in the layering of the material ring, and the coarse particle layer is close to the screen. On the side of the sheet, the fine grain layer covers the coarse grain layer to form a circulation layer

In the case that the circulation layer of the material cannot be destroyed, it will not only affect the return of the coarse particle material to the crushing area, but also affect the screening of qualified particles.

Especially in the process of micro-grinding, the hammer-sieve gap and sieve holes are small, and the rotor speed is high, so it is difficult for the material to pass through the sieve plate, which increases the friction and heat generation between the material and the sieve plate, which makes the temperature of the material rise, and the noise is large. At the same time, it also causes excessive crushing of materials in the crushing chamber, and the crushing capacity of the crushing machine is insufficient, so there is inevitably a serious blockage of the circulating layer, which makes the crushing efficiency low.

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