1、 About drum screen (rotary screen)

　　Drum screen or rotary screen is a traditional and classic screening machinery widely used in various industries such as coal, mining, power, and light industry for dry classification of various granular and small loose solid materials. It is also used for wet screening in industries such as metallurgy, building materials, and chemical industry. Drum screen is suitable for screening particle sizes ranging from tens of millimeters to over 100 mesh, which can adapt to outdoor open operation or meet special requirements for closed operation conditions.

　　2、 Working principle of drum screen:

　　Various drum screens are composed of circular or hexagonal drums, frames, funnels, reducers, drive motors, and auxiliary structures. The materials that need to be classified are fed into the feed inlet of the rotary screen by the granulator, and then pushed into the rotary screen through the inner screen cylinder. During the rotation process, the semi-finished products can be classified into three levels: standard particles, large particles, and fine particles through the screening of the inner and outer screens, achieving various particle classifications.

　　The drum screen has a wide range of applications, not only suitable for dry screening, but also for various wet screening. It is not only suitable for screening and selecting materials of various medium and coarse particle sizes, but also for screening materials of various medium and fine particle sizes. Moreover, by adding necessary auxiliary devices such as cleaning nets, it can effectively solve the common problem of clogging in fine screening operations. In addition, by adding a sealing device, the drum screen can also solve the problem of dust pollution in screening operations.

　　3、 Product features of drum screen:

　　1. Wide adaptability, convenient for large-scale and modular design, and easy to operate.

　　2. Due to its inherent characteristics in structure and working principle, the drum screen can effectively solve the problem of screen surface blockage and improve operational efficiency.

　　3. High screening efficiency, large processing capacity, and long service life.

　　4. Smooth and reliable operation, simple and convenient maintenance.

　　4、 Product performance of drum screen:

　　The mesh specifications are assembled according to user requirements, using stainless steel woven and bar welded mesh screens with good wear and corrosion resistance.

　　Note: Production capacity is related to the physical properties, feeding method, feeding particle size, and composition of the crushed materials.

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The company has extensive experience in providing services for large-scale projects and is a supplier to major enterprises such as China Railway and China Construction
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022026-02
Cleaning knowledge about swing screening machine - flat rotary screen
　　Swing screen, also known as swing vibrating screen, is a screening equipment that imitates manual screening actions. This series of equipment has good screening effect on cylindrical, elongated, and irregularly shaped materials without damaging the characteristics and shape of the materials themselves, meeting the requirements of modern people for screening materials: high efficiency and high precision. At present, swing screens are widely used in industries such as chemistry, food, medicine, and fertilizers.　　Do not stack any other debris around the swing screen machine, and the surrounding environment should also be kept clean. The price of the MSG swing screen should not be contaminated with other dust as much as possible to avoid the influence of other debris and prevent inaccurate screening of grains after screening. Before starting up and using the swing screen, it is necessary to check whether there are any debris in the machine compartment. The price of the glass bead swing screen should be cleaned to prevent different debris from mixing together and affecting the accurate screening of grains.　　Swing screens can be cleaned using bouncing balls, which is simple to use and easy to maintain. It is suitable for most granular materials, and ultrasonic cleaning is also a widely used cleaning method. It not only cleans the screen mesh, but also significantly improves production capacity. Suitable for most fine, high-yield, and difficult to screen materials, it improves work efficiency and time.　　Overall, China's swing vibration equipment is constantly improving and upgrading, and the market is showing a thriving trend. In the context of the continuous expansion of the food and drug market, domestic vibrating screen equipment should strengthen innovative technology, integrate market requirements, seize industry trends, and continuously meet the needs of more industries.
022026-02
Common faults and corresponding solutions of drum screen
　　Drum screen is a specialized screening equipment developed for industries such as building materials, metallurgy, chemical engineering, and mining. It overcomes the blockage problem of circular vibrating screens and linear vibrating screens when screening wet materials, improves the output and reliability of screening systems, and is widely used in sand and gravel separation in sand and gravel fields, as well as in size grading and block powder separation in chemical and mineral processing industries. It is highly favored by customers.　　Drum screen is a relatively large processing equipment in screening equipment. Although it does not have the complex structure of magnetic separators, sorting machines, etc., it has a large processing capacity during use. Therefore, some mechanical failures are inevitable during long-term use. The following are several important and easy to occur failures, and corresponding solutions are provided. We hope it can help you.　　1. Noise problem caused by loose equipment bolts　　Solution: Re tighten the bolts or other fasteners;　　2. Wrong rotation direction caused by incorrect connection of motor power cable　　Solution: Replace the power cable in the junction box;　　3. Delayed clicking start caused by motor overload or excessive conveying capacity　　Solution: Adjust the conveying capacity again;　　4. Insufficient ventilation or lack of lubricant inside the gearbox leads to overheating issues　　Solution: Check and adjust the ventilation vent for heat dissipation and add lubricant;　　5. Electric motor heating problem　　resolvent:　　(1) Clean the heat sink of the electric motor;　　(2) Check if the fan impeller is working properly and ensure smooth air circulation;　　(3) Reduce load;　　(4) Tighten the connection;　　(5) Check and rewire.　　6. Blocked sieve holes prevent the drum screen from functioning properly　　Solution: Clean up the clogged garbage in the sieve holes in a timely manner to reduce blockage.
022026-02
Internal factors causing noise in screening machines
　　1. Noise source　　The noise mainly comes from the operation of gears and rolling bearings. The main source of gear noise is gear collision caused by manufacturing errors such as smooth contact. The noise radiated through the shell to the connected structure also promotes the total sound power to be increased at resonance frequency, especially for large diameter gears, whose noise pollution is more serious.　　The noise of rolling bearings is often caused by the impact of the rolling elements in the raceway and the impact and vibration of the retainer inside the bearing. Therefore, it is related to the stiffness and smoothness of the vibrator shaft.　　2. Diffusion　　Resonance diffusion. Due to resonance between the frequency of the noise source and the vibration noise caused by the excitation of the screen, crossbeam, pipe, etc. In addition, resonance occurs when the natural frequency of the component is a multiple of the operating frequency of the sieve. It can be said that there must be resonance phenomenon in the center where strong noise is generated by the mechanical vibrating screen. Related to area. The diffusion noise is proportional to the area. From the characteristics of acoustics, it is difficult for low-frequency sounds to form noise without large-scale vibrations. Therefore, many inherent vibrations of large-scale vibrations are fundamentally in the low-frequency region. From this, it can be seen that there is a relative relationship between the area of the vibrating body and the generation of noise. The sieve, as a vibrating body, generates low-frequency noise due to the large-scale vibration of components such as the sieve plate and frame.　　3. Connect　　Poor connection (looseness) can cause impact, such as the screen frame and screen mesh colliding and the screen body components becoming loose. Due to rigid connections, there is significant noise.
022026-02
Eight precautions for using air flow screens for grading
　　1. Customers using air flow screens should carefully read the product manual before using the equipment. If they have any questions about the content introduced in the manual, they should contact our company for consultation and clarification in a timely manner.　　2. If a vibration exciter is selected, it should be inspected every six months, lubricating oil should be added regularly, and the connection parts should be checked regularly for tightness.　　3. Careful cleaning work should be done before and after daily homework, and attention should be paid to maintaining uninterrupted lubrication, fastening, and corrosion prevention of equipment throughout.　　4. The equipment should be equipped with grounding wires and regularly inspected for grounding wires, power switches, cables, and other electrical components to ensure that they are in good working condition. If aging or wear occurs, they should be replaced in a timely manner.　　5. The main unit, motor, and fan of the airflow screening machine should be checked regularly, lubricating oil should be added regularly, and dust inside the motor should be cleaned. It should be ensured that they are thoroughly inspected once a year.　　6. The screen mesh of the airflow screening machine should be checked regularly, and any damage should be replaced in a timely manner to ensure even tension of the screen mesh.　　7. Pay attention to maintaining the condition of the electrical control box and try to avoid dust falling in, otherwise it may cause electrical components to malfunction or short circuit.　　8. It is recommended that customers establish a comprehensive daily maintenance plan for the airflow screening machine and adhere to it.