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The vibrating screen works by utilizing the reciprocating rotary vibration generated by the vibrator excitation. The upper rotating weight of the vibrator causes the screen surface to produce plane gyration vibrations, while the lower rotating weight causes the screen surface to produce cone surface gyration vibrations. Their combined effect causes the screen surface to produce complex rotational vibrations. Its vibration trajectory is a complex spatial curve. The curve is projected as a circle on the horizontal plane and as an ellipse on the vertical plane. The amplitude can be changed by adjusting the excitation force of the upper and lower rotating weights. By adjusting the spatial phase angle of the upper and lower weights, the curve shape of the movement trajectory of the screen surface can be changed and the movement trajectory of the materials on the screen surface can be changed.
Working Principle
The process of passing the broken materials with different particle sizes through a single or multi-layer screen surface with uniform holes multiple times and dividing them into several different levels is called screening. Particles larger than the sieve holes remain on the screen surface and are called the over-sieve objects of the sieve surface. Particles smaller than the sieve holes pass through the sieve holes and are called the under-sieve objects of the sieve surface. The actual screening process is that after a large amount of mixed mixed materials with different particle sizes enter the screen surface, only a part of the particles are in contact with the screen surface. Due to the vibration of the screen box, the material layer on the screen is loosened, so that the large particles originally exist. The gap is further enlarged, and small particles take the opportunity to pass through the gap and be transferred to the lower layer or transporter. Since the gaps between small particles are small, large particles cannot pass through, so the originally chaotically arranged particle groups are separated, that is, they are stratified according to particle size, forming an arrangement rule in which small particles are at the bottom and coarse particles are at the top. The fine particles that reach the screen surface and are smaller than the screen holes pass through the screen, and finally realize the separation of coarse and fine particles, completing the screening process. However, there is no sufficient separation. During screening, a part of the under-sieve material is generally left in the over-sieve material. When fine particles pass through the sieve, although the particles are smaller than the sieve holes, their difficulty in passing through the sieve is different. It is more difficult for particles with similar sizes of materials and sieve holes to pass through the sieve, and it is even more difficult to pass through the particle gaps in the lower layer of the screen surface.
Working Features
①. Use block eccentricity as the excitation force, which has strong excitation force.
②. The screen beam and the screen box are made of high-strength bolts, with simple structure and convenient and quick maintenance
③Using tire couplings for flexible connection and smooth operation
④. Using small amplitude and high frequency , with a large inclination structure, the machine has high screening efficiency, maximum processing, long life, low power consumption and low noise.
According to the structure and working principle of screening machinery, there are roughly the following categories:
The working surface of the roller screen is composed of rolling shafts arranged horizontally.
The working surface of the roller screen is composed of rolling shafts arranged horizontally. The working part of the fixed screen is fixed and the materials are screened by sliding along the working surface. The fixed grid screen is one of the most commonly used in mineral processing plants. It is generally used for pre-screening before coarse or medium crushing. It has a simple structure and is easy to manufacture. No power is consumed and the ore can be unloaded directly onto the screen surface. The main disadvantages are low productivity and low screening efficiency, generally only %.
The plane motion screen body swings or vibrates in a plane. According to its plane motion trajectory, it is divided into linear motion, circular motion, elliptical motion and complex motion. Shaking screens and vibrating screens fall into this category.
Scope of application
The scope of application of vibrating screens is very wide, involving almost all aspects of life. Various types of vibrating screens are needed during processing and manufacturing.
Vibrating screens are mainly used in mining, coal, smelting, building materials, refractory materials, light industry, chemical industry, medicine, food and other industries.
Vibrating screens are most commonly used in mineral processing plants. According to their different transmission mechanisms, they can be divided into the following types of eccentric vibrating screens, inertial vibrating screens, self-centering vibrating screens, and resonant vibrating screens.
Zhongtai
The main machinery products include
gold mining boats (sand pumping type, bucket type, cutter suction type, etc.), gold mining equipment, gold mining machinery, gold selection equipment, gold selection machinery, water There are dozens of products for you to choose from, including sleeve centrifuges, alluvial gold equipment, alluvial gold machinery, automatic washing and sorting machines, and dryland alluvial gold equipment. The company also produces magnetic separators, iron sand ships, sand mining machinery, dredgers, sand screening machinery, sand washing machinery, stone washing machinery, crushers and other products. Products are widely used in sand fields, metallurgy, mining, river port dredging, water conservancy and mining and other industries.
The company follows the principles of cooperation, harmony, development and win-win
and has established deep friendship and good cooperative relations with suppliers across the country. In the ever-changing market economy**
/> To seek development, we adhere to the business philosophy of integrity, brand, service, and innovation, jointly create brand building, harmonious marketing, and establish a win-win strategic partnership.
Qingzhou Zhongtai Ore Sand Machinery Co., Ltd. warmly welcomes new and old users to negotiate and make friends all over the world. We hope to create a brilliant tomorrow together
Qingzhou vibrating screen machine
Shandong washed vibrating screen< br/> Mining vibrating screen
Linear vibrating screen
Vibrating screen machine
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