Hammer type crusher internally provided with feeding fan and rotary screen

Abstract

The invention discloses a hammer type crusher internally provided with a feeding fan and a rotary screen, which comprises a shell, a driving device as well as rotary screen assembly and a rotor assembly that are arranged inside the shell, wherein the rotary screen assembly comprises a fan and a filter screen; the rotor assembly comprises a hammer carrier plate and a hammer piece; the driving device drives the rotary screen assembly and the rotor assembly to rotate along the opposite directions at the same time; the fan can be used for throwing the material to the end of the hammer piece alongthe direction of 360 degrees, so that the material can be completely crushed by the hammer piece; meanwhile, the rotary screen assembly and the rotor assembly rotate along the opposite directions, sothat a material circulation layer can be prevented from being formed, and the problems of material blockage, excessive crushing, uneven granularity, high material temperature, high consumption and energy consumption and the like can be avoided; and the filter screen rotating at the wrap angle of 360 degrees is beneficial to discharging, so that circumferential 360-degree feeding and 360-discharging can be realized, and the problem that a screen of the traditional crusher is fixed, so that the feeding direction is limited can be solved. The hammer type crusher has the advantages of high efficiency, energy conservation, environmental protection, good quality of finished goods and the like, and can be applied to vertical and horizontal hammer type crushers, thus having wide application scope.

Description

technical field [0001] The invention relates to a machine for crushing materials in the fields of feed, food, chemical industry, pharmacy, etc., in particular to a hammer mill with a built-in feeding fan and a rotary screen. Background technique [0002] The hammer mill is used in feed, food, chemical, pharmaceutical and other industries to obtain the required powder through high-speed shearing, hammering, and filtering through a screen driven by strong airflow, especially in the feed industry. , Crushing equipment generally accounts for 35%-60% of the total installed capacity, and has a wide range of uses. [0003] In the prior art, there are two types of hammer mills: vertical type and horizontal type. The vertical type is generally used for medium-sized pulverizers; Different feeding methods correspond to different sieve wrapping angles. Generally speaking, the wrapping angle can reach up to 300°. [0004] Existing hammer mills have the following deficiencies: [0005]...

AI Technical Summary

Problems solved by technology

[0005] ① The feeding method is limited. The horizontal type is single-point feeding. Each row of hammer blades on the rotor needs to rotate a circle (360°) to form a blow to the material. At present, there are only three points of feeding at most in the vertical type. Therefore, every A row of hammer blades can only strike the material three times at most during one revolution. The hammer blades can only effectively shear and hammer the material at one or several points within one revolution, and most of the time is in an idling state, causing the material to The crushing efficiency is greatly limited, and the energy utilization rate is not high. In addition, due to the intermittent shearing and hammering of the hammer, the load on it is not uniform, resulting in relatively large vibration and noise of the equipment. , It also has adverse effects on the motor;

[0006] ②The traditional hammer mill restricts the orientation of the feed port due to the feeding method, and the wrap angle of the screen cannot reach 360°, and it must be fixed so that the material enters the crushing chamber through the gap, resulting in material circulation in the inner ring of the screen during operation. Because the material rotates with the rotor hammer, the hammer cannot effectively strike the material, which also has a great impact on the crushing efficiency and quality, and increases energy consumption. At the same time, the circulation layer prevents the crushed small particles from being discharged from the screen in time. Excessive pulverization of the material not only increases unnecessary energy consumption, but also brings problems such as uneven particle size, high material temperature, and large shrinkage;

[0007] ③The screen of the traditional pulverizer must be fixed and the feeding gap must be reserved, and it cannot be closed at 360°, so that the discharge angle is limited, the screen area is relatively small, and it is easy to cause screen blockage for small screen holes (below Φ1.0mm). , the material cannot be effectively discharged within the maximum range;

[0008] ④The traditional pulverizer has a fixed screen and is difficult to discharge. It needs to be equipped with a special wind dust removal auxiliary system, which increases the investment in equipment and the cost of maintenance and cleaning, and easily causes dust pollution to the environment. At the same time, it also increases the total installed capacity. , takes up a lot of space and increases energy consumption;

[0009] ⑤The pressure screen mechanism of the traditional pulverizer is bulky, difficult to process, high in manufacturing cost, and fragile

[0010] In view of the above deficiencies, it is necessary to explore a hammer mill to solve the problems of traditional hammer mills such as low crushing efficiency, poor material discharge, high energy consumption, affecting the quality and efficiency of finished products, serious pollution, and manufacturing maintenance. high cost

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