Sieve sheet cleaning device

Abstract

The present invention relates to hammer crusher technology, and is one sieve sheet cleaning device. The sieve sheet cleaning device includes sieve sheets fixed to the crusher, and pulse plate set beside the sieve sheets with inside separated from the sieve sheets and outside connected to one driving mechanism. During operation, the pulse plate is driven to pulsate, so as to push the airflow toward the sieve sheets, and the instantaneous airflow impact destroys the circulation layer formed inside the sieve sheets and cleans the sieve sheets for high permeability. The present invention may be used in hammer crusher and can raise the crushing efficiency of crusher greatly, especially in crushing watery or oily material and in superfine crushing.

Description

technical field [0001] The invention relates to a device for crushing grain, feed, etc., in particular to a hammer mill. Background technique [0002] The current hammer mill mainly includes a crushing chamber, a rotor with a number of hammers fixed on the outer periphery of the crushing chamber, a sieve fixed to the machine body on the outer periphery of the rotor, and a gap between the sieve and the hammer. The opening on the upper part of the chip communicates with the feed inlet of the crushing chamber, and there are several sieve holes on the screen, and the discharge port is set at the bottom of the crushing chamber; when working, the rotor drives the hammer to perform high-speed circular motion, and the material enters the screen from the feed port. Between the rotor and the hammer, the material is crushed under the impact of the hammer, and the crushed material passes through the sieve hole and collects to the bottom of the crushing chamber, and leaves from the disch...

AI Technical Summary

Problems solved by technology

[0002] The current hammer mill mainly includes a crushing chamber, a rotor with a number of hammers fixed on the outer periphery of the crushing chamber, a sieve fixed to the machine body on the outer periphery of the rotor, and a gap between the sieve and the hammer. The opening on the upper part of the chip communicates with the feed inlet of the crushing chamber, and there are several sieve holes on the screen, and the discharge port is set at the bottom of the crushing chamber; when working, the rotor drives the hammer to perform high-speed circular motion, and the material enters the screen from the feed port. Between the rotor and the hammer, the material is crushed under the impact of the hammer, and the crushed material passes through the sieve hole and collects to the bottom of the crushing chamber, and leaves from the discharge port; the disadvantage is that the material is crushed by the hammer Accelerate the movement, the effect of centrifugal force makes the material break away from the impact of the hammer, and quickly form a material ring inside the sieve, the quality of the coarse and fine materials is different, resulting in the layering of the material ring, the coarse material layer is close to the side of the sieve, and the fine material Layered on the coarse material layer to form a circulation layer, which cannot destroy the circulation layer of the material, not only affects the return of large particle materials to the crushing area, but also affects the sieving of fine materials, especially in high-moisture, oily, ultra-fine crushing When, it is inevitable that there will be severe blockage of the circulation layer

Concentration and wind speed are related to air volume, which means effective air volume. During the working process of the pulverizer, air volume and air pressure are in a self-balancing state. To ensure effective air volume, wind pressure must be considered. A stable air pressure can ensure the stability of effective air volume. What affect the wind pressure fluctuation of the system is the circulation layer of the sieve and the blocking screen. If the circulation layer and the sieve are not destroyed in time and the resistance increases, the air volume will decrease and the wind speed will decrease, and the material cannot be taken out. Reasons for lower production

It is meaningless to increase the air volume one-sidedly. In the end, it must be in a balanced state. On the contrary, it will increase the processing difficulties of the equipment behind the process and increase the investment.

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