Main technical parameters of JFS-13A cyclone pulverizer:
This machine is equipped with two types of screens, 60 mesh and 80 mesh per inch.
Drive power: 550 watts, single-phase, 220 volts
Working impeller diameter: 127 millimeters
Impeller speed: 10000 revolutions per minute
Transmission method: Nylon flat drive belt
Feeding speed: 1-2 grams per second
Discharge method: Airflow conveying, sieving, automatic deposition in the sample bottle
Weight: Approximately 16kg
Size: 330 × 220 × 380mm
Working principle
This machine is an efficient sample grinding mill manufactured based on the design concept of high-speed impact crushing, which can obtain uniform powder materials. It is suitable for crushing various dry materials such as grains, feed, medicinal materials, chemicals, plant leaves, grass, etc.
The design feature is to utilize the high-speed rotation of the working impeller (10000 revolutions per minute) and the high-speed airflow formed by it to cause the processed material to collide, roll, and strongly rub against the grinding belt at high speed in the grinding chamber, forming fine particles (Figure 1).
The particle size of the processed material can be changed according to the needs, with different aperture screens (12). This machine is equipped with two types of screens, 60 mesh and 80 mesh per inch. The material accelerated by the impeller (15) interacts with the grinding belt (16), and the granular material passes through the sieve and enters the sample (2) through the settling cylinder (5).
The above process can only be completed within 2-3 seconds. When the particle size of the material in the sample bottle cannot fully meet the requirements, the sieve can be replaced, then sent to the sieve, and finally sent to the hopper for processing. When processing materials with low particle size requirements, the sieve can be removed to increase the feeding amount. To improve productivity. During the processing. The humidity in the high-speed moving material and grinding chamber rises to about 30 ℃ -35 ℃. These heat will be transferred from aluminum alloy parts with good thermal conductivity to the surrounding medium (air).
The heat generated by the electric motor and transmission system is absorbed by the air entering from the bottom of the housing (23) and discharged from the rear exhaust outlet of the base.
The shock-absorbing pad (20) between the base and the shell, as well as the sound-absorbing layer inside the shell, are all used to improve the working environment.
Functions of each component (Figure I)
1. Electric motor
The support column (22) installed on the chassis (19) of the electric motor is used to fix the electric motor (24), with a power of 370 watts (single-phase, 220 volts) and a speed of 2800-3000 revolutions per minute. The rotation direction (viewed from the shaft end) is counterclockwise. There is a large belt pulley (21) installed on the shaft.
2. Bearing assembly
Install the impeller (15) on one set (two) of bearing ends on the impeller shaft, and install a small pulley (27) at the lower end, which is driven by the large pulley through a belt (7) with a speed ratio of 3:7:1.
1. Grinding chamber cover
The grinding chamber cover (18) is the working space of the impeller (15), and the cover is equipped with a rough inner circumference grinding belt (16) to avoid contamination during processing. The grinding belt is made of stainless steel. The grinding chamber cover is made of aluminum alloy casting to utilize the heat generated during the machining process for timely dissipation.
2. Impeller
The object being processed is a high-speed rotating impeller (1) that, under repeated action, is thrown towards the surrounding grinding belt (16) and moves at high speed along the surface of the grinding belt to achieve the purpose of crushing the material being processed. The impeller is also cast from aluminum alloy.
3. Screen slice
The processed material after crushing is carried by the airflow through the sieve (12) and enters the sample bottle (2). Two types of sieve (60 mesh, 80 mesh/inch) are available for selection to control the particle size.
4. Sample bottle bottom
There is a set of spring mechanisms at the bottom of the sample bottle (1) that can hold the sample bottle (2), allowing the bottle to be pressed into the conical settling cylinder (5). The powder particles carried by the airflow and passing through the sieve plate will slow down and sink into the bottle inside the settling cylinder, and the air will be discharged into the atmosphere through the central diffusion hole (9) and filter (11) above.
5. Vibration damping pad
Rubber damping pad (20) is used to reduce the vibration of the electric motor and belt transmission system, ensuring smooth operation of the whole machine.
6. Shell
The shell (23) is tightly pressed onto the rubber damping pad (20) through the motor fixing plate (26). The bottom of the shell is equipped with four elastic supports, with the middle being the cooling air inlet of the motor, which should not be blocked. The inner wall is covered with a sound-absorbing layer to reduce working noise.
7. Feeding hopper
The feeding hopper (13) is directly fixed on the upper part of the grinding chamber, and the negative pressure formed by the high-speed operation of the impeller is used to control the material in the hopper to slowly and automatically enter the grinding chamber at a rate of 3-4 grams per second, ensuring that the processed material directly enters near the center of the impeller and promoting the crushing quality of the material. Using hands to hold the bucket can increase the crushing time of materials in the grinding chamber, improve the uniformity of material crushing, but at the same time reduce the powder yield, so it is not suitable to store for a long time.