What is UHM series curved vibrating screen？
UHM series of curved vibrating screen is mainly used in coal processing plant for pre-dehydration, desliming and de-meshing of materials, and can also be used with hydrocyclone to effectively classify, dewater, desliming and de-meshing of fine-grained materials.
The UHM series curved vibrating screen is a screening machine that plays a key role in many industrial sectors. With its unique design and excellent performance, it provides a reliable solution for accurate screening of a wide range of materials.
Working Principle of UHM Series Curved Vibrating Screen
UHM series curved vibrating screen adopts advanced vibration technology. The motor drives the vibration source to produce vibration, so that the screen surface produces a specific regular vibration movement. The material on the screen surface is subject to the double action of vibration and gravity, according to the different size of the material particles, particles smaller than the size of the sieve holes through the sieve holes to become under-screen material, and particles larger than the size of the sieve holes stay on the screen surface to become on-screen material, so as to realise the classification and screening of the material.
Main structural characteristics of UHM series curved vibrating screen
1.Screen box
The sturdy and durable structure of the screen box can withstand high-intensity vibration without deformation, ensuring the stability of the equipment in long-term operation.
Reasonable design makes the screen box easy to install and maintain, reducing the maintenance cost of the equipment.
2.Screen mesh
Adopting high-quality screen mesh material with high wear resistance and corrosion resistance ensures that the screen mesh is not easy to be damaged during long time use, which prolongs the service life of the screen mesh.
The aperture and shape of the screen mesh can be customised according to different screening requirements to meet the precise screening requirements of various materials.
3.Vibration source
Efficient vibration source can provide stable and strong vibration force to ensure that the materials on the screen surface can be fully dispersed and stratified to improve screening efficiency.
The amplitude and frequency of the vibration source can be adjusted according to the actual situation, in order to adapt to the changes of different materials and screening requirements.
Application areas of UHM series curved vibrating screen
1.Mining field
In the screening and classification of ores, UHM series curved vibrating screen can effectively separate ores with different particle sizes and provide high quality raw materials for subsequent beneficiation and processing.
For the screening of various ores such as coal, iron ore, copper ore and so on, they have shown excellent performance.
2.Construction material field
In the production process of cement, sand and gravel and other building materials, this vibrating screen can screen out the impurities and unqualified particles in the raw materials to ensure the quality of building materials.
For the screening of concrete aggregate, it can precisely control the particle size distribution of aggregate and improve the performance of concrete.
3.Chemical field
In the production of chemical raw materials and products, it is used for sieving powdery and granular materials to ensure that the particle size of the products meets the requirements.
The screening effect is remarkable for chemical products such as chemical fertiliser, plastic granules, rubber auxiliaries and so on.
UHM series curved vibrating screens offer some of the following advantages:
1.High-efficiency screening: it can screen materials quickly, with high screening efficiency and productivity, which can effectively improve the efficiency of production operations.
2.Tigh utilisation rate of screen surface: the curved screen surface and screen frame adopt pivot steering structure, which can rotate 180°, effectively improve the operating efficiency and prolong the service life of screen surface.
3.Strong processing capacity: it can process large-scale materials to meet different production requirements.
4.Good effect of dewatering, desliming and demoulding: it is mainly used in coal processing plant to carry out pre-dehydration, desliming and demoulding of materials, and it can also be used together with hydrocyclone to carry out effective classification, dewatering, desliming and demoulding of fine-grained materials.
5.Reliable structure: the screen box usually consists of three kinds of screen boxes with a radius of curvature of 2030mm, with a wrapping angle of 45°, 53° and 60°, which has enough rigidity to ensure the stable operation of the equipment.
6.Various screening specifications: according to different materials and user requirements, choose the appropriate screen slit size, in order to achieve the ideal screening effect.
7.Convenient installation: the installation of the seat type is relatively simple, and the installation height is low.
8.Convenient maintenance: the structure is relatively simple, which is convenient for daily maintenance and overhaul work.
Here are some common questions and answers about UHM series curved vibrating screens:
一．Performance
1.How is the screening efficiency of UHM curved surface vibrating screen?
UHM series curved vibrating screen has high screening efficiency. Its advanced vibration technology and reasonable screen surface design can make the materials spread and stratified on the screen surface, and screen them accurately according to the particle size. Particles smaller than the screen holes can quickly pass through the screen holes, while particles larger than the screen holes are effectively retained, thus ensuring efficient screening operation.
2.What is its capacity?
UHM series curved vibrating screens usually have a large capacity. The specific capacity depends on the screen surface area, vibration frequency, material characteristics and other factors. Generally speaking, it can meet the needs of different scales of production, whether it is a small factory or a large industrial production line.
二．The structure and components
1.How long is the service life of the screen mesh?
The service life of the screen mesh is affected by a variety of factors, such as the hardness of the material, corrosiveness, screening frequency and so on. In general, if normal use and maintenance, screen mesh made of high-quality materials can be used for a long time. However, when encountering severe wear and tear or clogging of the screen holes, etc., it may be necessary to replace the screen mesh in time. Usually ranging from a few months to a few years.
2.How reliable is the vibration source?
The vibration source is carefully designed and rigorously tested for high reliability. It uses high-quality motors and transmission components to provide the required vibration force in a continuous and stable manner. At the same time, it also has certain overload protection and fault diagnosis functions, and can operate stably for a long time under normal operation and maintenance.
三．Maintenance and maintenance aspects
1.What matters need to be noted for daily maintenance?
Daily maintenance should pay attention to regular cleaning of the screen surface, to prevent the accumulation of materials and clogging of the screen holes; check whether the bolts of the connecting parts are loose, and tighten them in time; observe the operating status of the vibration source, such as whether there is any abnormal noise, heat, etc.; check the wear and tear of the screen mesh on a regular basis, and replace them in time if necessary.
四.The application of suitable aspects
1.What materials is it suitable for screening?
UHM series curved vibrating screen is suitable for screening a wide range of materials, including but not limited to ores (such as coal, iron ore, copper ore, etc.), construction materials (such as cement, sand and gravel, etc.), chemical raw materials (such as fertiliser, plastic granules, rubber auxiliaries, etc.), and other granular or powdery materials. In addition, its structural design makes it have a certain degree of resistance to harsh environments. For example, its screen box and components are made of robust materials and protective coatings, which enable it to operate normally in harsh environments such as high temperature, high humidity and dusty conditions. However, under extreme conditions, additional protective measures and enhanced maintenance may be required.
Factors affecting the screening effect of UHM series curved vibrating screens:
一.The equipment itself factors
1.Sieve surface structure and parameters
Sieve hole shape and size: different shapes (such as round, square, rectangular, etc.) and sizes of the sieve holes have a direct impact on the passability of different materials. If the shape of the sieve holes does not match the shape of the material particles or the size of the sieve holes is not suitable, it may lead to lower screening efficiency or mis-screening.
Screen length and width: the longer the screen surface, the longer the material stays on the screen surface, the better the screening effect may be; the width of the screen surface determines the amount of material that can be processed in a unit of time.
Sieve surface inclination: the size of the sieve surface inclination will affect the movement speed and residence time of the material on the sieve surface. Inclination angle is too large, the material movement speed, may not be able to fully screen discharged; inclination angle is too small, may lead to material accumulation, affecting the processing capacity and screening efficiency.
2.Vibration parameters
Vibration frequency: the appropriate vibration frequency can make the material in the sieve surface to maintain a good beating state, promote the particle stratification and through the sieve. Too high or too low frequency may lead to poor screening effect. For example, too high a frequency may make the material splash, too low a frequency may make the material pile up on the screen surface.
Amplitude: Amplitude determines how much the material bounces on the screen surface. Amplitude is larger, the material is easier to disperse, in favour of large particles of material through the sieve, but too large an amplitude may lead to structural damage to the equipment and increased noise; amplitude is smaller, the material is relatively smooth, but may affect the small particles of material through the sieve effect.
二.The material characteristics of factors
1.Material particle size distribution
Particle size composition: If the proportion of coarse and fine particles in the material is large, there may be coarse and fine particles interfere with each other. For example, the fine particles may be blocked between the coarse particles, affecting the coarse particles through the sieve, or the coarse particles may hinder the normal movement of the fine particles, reducing the screening efficiency.
Size range: The wider the size range of the material, the more difficult it is to screen. Because of the different particle size of the material on the screen surface of the law of motion and permeability is different, need to be more reasonable equipment parameters and operating conditions to ensure that the screening effect.
2.Material humidity and viscosity
Humidity: when the material humidity is high, it is easy to form mud on the screen surface or adhere to the sieve holes, resulting in sieve hole blockage, reducing the screening efficiency. Especially for some fine particles, viscous materials, the impact of humidity is more significant.
Sticky: sticky materials are easy to stick to each other on the screen surface, forming agglomerates, affecting the dispersion of materials and sieve through. Viscous materials may also be attached to the screen frame and vibration components, increasing the operating resistance and wear and tear of the equipment.
3.material density and shape
Density: different densities of materials in the vibration effect of the state of motion and stratification effect is different. Generally speaking, it is more difficult to achieve uniform screening when materials with large density differences are mixed together.
Shape: the shape of the material particles will affect its movement on the screen surface and through the screen. For example, spherical particles are relatively easy to roll and penetrate the sieve, while flaky or needle particles may intertwine with each other or jam in the sieve holes, affecting the screening effect.
三.The operation and environmental factors
1.Feeding method and quantity
Feeding method: uniform feeding can make the material distributed evenly on the screen surface, which is conducive to improving the screening efficiency. If the feeding is not uniform, it may lead to local screen surface load is too large or too small, affecting the overall screening effect.
Feeding volume: too large a feeding volume, more than the processing capacity of the vibrating screen, the material will be piled up on the screen surface, too late to fully screen; feeding volume is too small, it may lead to low equipment utilisation, low production efficiency.
2.Working environment temperature and humidity
Temperature: in a high temperature environment, some parts of the equipment may have thermal expansion, deformation and other problems, affecting the normal operation of the equipment and screening accuracy. At the same time, high temperature may change the physical properties of materials, such as viscosity, fluidity, etc., which in turn affects the screening effect.
Humidity: the humidity in the working environment will not only affect the humidity of the material itself, but also may have a corrosive effect on the electrical components and metal structure of the equipment, affecting the service life of the equipment and the stability of its performance, indirectly affecting the screening effect.
3.Equipment maintenance and cleaning conditions
Equipment maintenance: regular maintenance of the vibrating screen, such as checking the vibration motor, transmission components, screen mesh and other working conditions, timely replacement of worn parts, to ensure that the equipment is always in a good state of operation, to ensure the screening effect.
Cleaning condition: keep the screen surface and the inside of the equipment clean, clean up the residual materials and debris in a timely manner to prevent the screen holes from being blocked and materials from accumulating, which is crucial for maintaining the screening effect.
UHM series curved vibrating screen has become an indispensable screening equipment in many industries with its advanced technology, reliable performance and wide range of applications, providing strong support for the development and production of various industries.
