Shaftless drum screen

Detailed introduction of drum screen:

Structural composition 1

Drum device: It is the core component of drum screen, usually made of stainless steel or carbon steel, with sieve holes of different sizes on the surface, designed in several sections, with the same sieve hole diameter on each section, and arranged from small to large.
Driving device: Generally, a motor and a reducer are used to provide rotational power for the drum device, so that the drum rotates around its axis.
Support device: It includes rollers and bearing systems to ensure stable operation of the drum.
Feed inlet and discharge port: They are used to feed the material to be screened and discharge the screened product respectively. There are generally two discharge ports, one for discharging the product under the screen (qualified material) and the other for discharging the product on the screen (unqualified material).
Sealing cover: It is used to close the drum screen to prevent material leakage and dust flying, and it is easy to collect dust in a closed manner.
Frame: It is used to support and fix the components of the entire drum screen to ensure the stability of the equipment.
Working principle 1

The drum device is installed on the frame at an angle, and the motor is connected to the drum device through a reducer through a coupling. When the material enters the drum device, the tilt and rotation of the drum cause the material on the screen surface to flip and roll. Qualified materials smaller than the size of the screen hole are discharged through the discharge port at the bottom of the rear end of the drum, and unqualified materials larger than the size of the screen hole are discharged through the discharge port at the tail of the drum. At the same time, the flipping and rolling of the material in the drum can eject the material stuck in the screen hole to prevent the screen hole from being blocked.
Feature 1

The screen hole is not easy to be blocked: the material is constantly rolling and jumping in the drum, so that the material stuck in the screen hole is easy to be ejected, reducing the possibility of blockage of the screen hole.
Smooth operation and low noise: The movement mode of the drum screen is rotational motion, which is relatively stable, and the various components of the equipment are closely matched, and the noise generated during operation is low.
Simple structure and convenient maintenance: The overall structure is relatively simple, the number of parts is small, and it is easy to install, disassemble and repair, which reduces the maintenance cost and downtime of the equipment.
The screening drum can be closed and easy to collect dust in a closed manner: it can effectively prevent dust from flying, reduce pollution to the working environment, and meet environmental protection requirements.
High reliability of the whole machine and low one-time investment: With mature technology and reliable parts, the overall reliability of the equipment is high, and the price is relatively low, with low one-time investment cost.
Using special screens, high screening efficiency and long service life: The special screens can better adapt to the screening needs of different materials, improve screening efficiency, and have high wear resistance and corrosion resistance, which prolongs the service life of the screen.
Scope of application

Stone field: used for grading large and small stones and separating soil and stone powder, and classifying the crushed stones according to different particle sizes for subsequent use or further processing1.
Sand and gravel field: used for sand and stone separation to improve the purity and quality of sand1.
Coal industry: used for separation of lump coal and coal powder and coal washing, it is a component of coal washing machinery, which can remove impurities in coal and divide coal into different specifications according to demand, improve combustion efficiency and reduce pollutant emissions1.
Chemical industry, mineral processing industry: used for grading large and small blocks and separating powdered substances, screening various chemical raw materials, ores, etc., to meet the requirements of different production processes1.
Grain processing: It can be used to clean up debris in grains, such as straw, dirt, etc., to ensure the quality and safety of grain.
Garbage disposal: It can classify different types of waste such as plastic, metal, paper, etc., to improve recycling rates and reduce environmental pollution. It is usually used as a primary sorting device in garbage sorting centers5.