A symmetrical eccentric spindle assembly hammer mill

Abstract

The invention relates to a hammer mill with symmetrical eccentric main shaft assembly, which includes a crushing chamber, and a crushing main shaft is arranged in the crushing chamber, and the crushing main shaft is sequentially divided into a left connecting section, a left eccentric section, an intermediate shaft shoulder, and a right eccentric section and the right connecting section, the left connecting section and the right connecting section are arranged symmetrically, and are respectively inserted into the two bearings on the shell of the crushing bin; The central axes of the left connecting section, the left eccentric section, the middle shaft shoulder, the right eccentric section, and the right connecting section are parallel and located in the same plane, and the lengths and diameters of the left and right eccentric sections are equal; the left and right The eccentric distances of the eccentric sections are equal and opposite in direction; the hammers are installed on the left eccentric section and the right eccentric section, and the hammers of the left eccentric section and the hammers of the right eccentric section are symmetrically arranged. The invention can be used not only for coarse crushing but also for fine crushing, so that one machine can be used for two purposes.

Description

technical field [0001] The invention relates to a symmetrical eccentric main shaft assembly hammer mill, which belongs to the technical field of hammer mills. Background technique [0002] The crushing of feed raw materials is a very important link in feed processing. Through crushing, the total surface area of ​​raw material particles per unit mass can be increased, the solubility of feed nutrients in animal digestive juice can be increased, and the digestibility of animals can be improved. The hammer mill is the most widely used feed mill. Its structure usually consists of a feeding mechanism, a crushing bin (rotating shaft, hammer, sieve, tooth plate) and a discharge mechanism (fan, collecting barrel, collecting Dust cloth bag) consists of three parts. When working, the feed is subjected to strong friction between the screen surface and the hammer, and is gradually crushed under the repeated impact, collision and friction. [0003] In a common hammer mill, the main shaft...

AI Technical Summary

Problems solved by technology

In addition, the screen of the hammer mill is usually made of thin steel plate or iron sheet punching. According to the production process and standards of the screen (such as the screen used to produce fish and shrimp aquatic feed, the aperture is usually less than 1mm, and the thickness is usually 1mm. Below), during micro-grinding, especially when the sieve aperture is less than 1mm, the opening ratio of the sieve is low, often below 20%. At this time, the resistance of the sieve increases sharply, and the sieving efficiency of the crushed material is greatly reduced

[0005] In order to improve the screening efficiency and increase the output of micro-grinding, it is necessary to reduce the gap between the hammer and sieve, but after reducing the gap between the hammer and the sieve, there will often be screen blocking faults, whether it is coarse crushing or fine crushing, it may be caused by screen blocking faults shredder not working

Although it is easy to block, the existing hammer mill must also reduce the hammer-sieve gap to increase the screening efficiency during fine crushing, but due to the large screen aperture, large opening ratio and small screen resistance during coarse crushing Not easy to block the screen

Based on the above reasons, ordinary hammer mills and screens with larger apertures are usually used for coarse crushing, and special micro-pulverizers of different designs are used for fine crushing, and screens with apertures below 2 mm are used to reduce the hammer size. Screen clearance, or use an airflow classification mechanism to replace the small-diameter screen with high resistance to obtain a larger micro-grinding output. The consequences of this are that the cost is high, the space is large, and the operation is troublesome, which reduces the work. efficiency

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