1. ZBG type linear vibration probability sieve At present, the ZBG type probabilistic sieves of one specification and three specifications of the South Mine are produced by Anshan Mine and Zheng Mine. The technical performance is shown in Table 1. Such probabilities are seat-type sieve, the mesh structure has a metal rod, and the welding wire braid, usually the upper layer as a stick, a woven mesh bottom. It can be used for classification of coal, ore or other fine-grained materials.
   Table 1
Model meaning example ZBG714-4 : Z - straight line, B - self-synchronous type, G - probability screen, 7 - screen width (dm), 14 - screen length (dm), 4 - screen surface The number of layers.
The external dimensions of the ZBG1521-4 linear vibration probability sieve produced by the Anshan Mine and the ZBG714-4 linear vibration probability sieve produced by Zheng Mine are shown in Figure 1 and Figure 2, respectively.
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GLS type linear vibration probability screen GLS type linear vibration probability screen produced by Dahua Heavy Machinery, foreign called Morganson sieve (MOGENSEN). It can effectively complete the whole screening process of materials according to probability theory, and is widely used in the screening operation of powdery and granular materials in chemical, pharmaceutical, food, mineral and other industries. The utility model has the advantages of large production capacity, high screening precision, large sieve hole, long service life of the screen, convenient replacement, low power consumption, easy meshing of the sieve holes, more screening products (up to 6 types), low noise and full closure. . The technical parameters are shown in Table 2.
The GLS type linear vibration probability screen produced by Zhenyuan Machinery adopts multi-layer large-angle screen surface, and the inclination angle of the screen from top to bottom is increasing. Using the probability theory, the sieve hole is larger than the required sieve size, generally 1.2~2.2 times, which is greatly improved. Screening efficiency and production capacity. The plant according to screening requirements plus iodine salt, the probability of successful development of fine-grained closed screen can also be used for light industry, chemical, pharmaceutical, food, food and other industries of the fine, powdery materials can be dry sieving. This series of sieve machines adopts double motor self-synchronous drag, and the excitation is adjustable. It has the characteristics of small volume, light weight, low power consumption, low noise, easy meshing of screen holes, no dust pollution, convenient installation and maintenance, and high screening efficiency. The series is divided into three to six layers, which can be suitable for the separation of four to seven products, or multi-layer screening of one product to achieve high yield. The screen box is divided into anti-corrosion type (stainless steel) and common type, and the screen surface is steel wire mesh. The technical parameters are listed in Table 3.
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The GS series probabilistic screen produced by the GS series Probability Screen Long Hair Mining Machine clearly and effectively completes the entire screening process of the material according to the probability theory. The sieve machine adopts multi-layer sieve surface and large sieve hole, and the output per unit area is large, and the time required for screening materials is only 1/3~1/20 of the ordinary sieve machine. The utility model has the advantages of small volume, light weight, low power consumption, easy meshing of the screen hole, good vibration isolation, strict dustproof, convenient installation and maintenance. This equipment can be used for screening various materials such as coal and limestone . The technical parameters are shown in Table 4.
   Table 4
2. ZGS-type self-synchronous probability sieve This kind of probability screen produced by Shendian is actually linear vibration type, which is excited by the constant velocity and reverse rotation of the vibration motor with two eccentric blocks at the shaft end. Achieve linear vibration. According to the self-synchronization theory, after the motor is started, any one of them can be stopped, and the synchronous vibration can still be ensured, and the amplitude is hardly changed, so that the power can be saved and the service life of the motor can be prolonged. The amplitude can be seen from the amplitude table of the sieve machine, and the adjustment method is to open the two ends of the vibration motor, and then loosen the screws of the eccentric block (moving block) of the shaft to change the coincidence angle of the two eccentric blocks. Yes, but the four sets of eccentric blocks of the two motors must be adjusted at the same time.
The ZGS self-synchronizing probability sieve series has 3 specifications and has 3 layers of screen surface (Fig. 3). The mesh size is reduced from top to bottom and the slope of the screen surface is increased layer by layer. Graded by particle size. The sieve has small volume, light weight, easy to block the mesh hole, convenient installation, easy maintenance, good vibration isolation, dustproof and low power consumption, and is suitable for mining, coal and other industrial sectors.
The technical performance of the ZGS self-synchronizing probability sieve is shown in Table 1 on the first page.
3. ZDG type linear vibration equal thickness probability sieve The probability sieve is produced by the anortic mine. Currently, there is only one specification. It is a seat type installation with 3 layers of screen surface. The screen surface structure has metal rods and metal lined with rubber material. 3 kinds of plates and rubber rods. The screen surface is not easy to be blocked and has little wear, and the throughput per unit area is large. Suitable for dry and wet grading of coal, ore or other medium-grade materials.
In addition, the domestic production of a GDS1030 linear vibration equal probability sieve, the sieve surface is 2 layers, the feed size (250mm, processing capacity 120~180t / h. ZDG2040 linear vibration equal thickness probability sieve see the first technical performance Table 1, the outline and installation dimensions are shown in Figure 4.
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ZDG2040 meaning: Z - linear vibration, D - equal thickness, G - probability sieve, 20 - screen width (dm), 40 - screen length (dm).
4. Inertial Resonance Probability Screen The Probability Screen is a screening equipment jointly developed by Shendian and Northeast Institute of Technology (now Northeastern University). It is produced by the factory and has three specifications, all of which are double-layer sieves. Face, hanging or seated. The sieve is composed of a sieve box equipped with a rubber sieve plate, a balanced mass body and a single-axis inertial vibrator, a shear rubber spring (a connection member of the sieve box and the balance mass body), and a vibration isolation spring. The screen box, the balance mass and the shear rubber spring form the main vibration system, so that the sieve body forms a double-body vibration system, which works under near resonance conditions, and its working frequency is slightly lower than the natural frequency of the main vibration system, and is separated. The vibration system (composed of a screen box, a balanced mass body and a vibration isolating spring) has a natural frequency of more than three times, so that a good vibration isolation effect can be obtained. The screen box is suspended by the four vibration isolating springs on the structural frame or on the base. The ordinary squirrel-cage Y160L-4 type motor mounted on a balanced body drives a spindle with an eccentric block to rotate by a V-belt. Since the natural frequency in the Y direction is close to the operating frequency, the screen box has a large amplitude in the Y direction and a small amplitude in the X direction. The trajectory of the screen box is an ellipse that is close to a straight line. Its long axis is approximately parallel to the shearing direction of the shear rubber spring.
Since the inertial resonance probability sieve organically combines the inertial resonance principle with the probability screening principle, it has the triple action of feeding, feeding and sieving, and adopts the shear rubber spring as the main vibration spring, so it has the following excellent performance: a The processing capacity per unit area is about 5 times higher than that of ordinary vibrating screen; b) the screening process is very fast and the screening efficiency is high; c) the start-stop is rapid, suitable for regular quantitative screening and frequent start-up; d) each It can save one feeder before the sieve machine; e) the power consumption is less than half of the non-resonant type screen electromechanical consumption; f) the sieve machine works with low noise and good sealing, so the working environment is good; g) sieve The machine is small in size, light in weight, reliable in operation, convenient in maintenance and less in maintenance work; h) suitable for screening of various materials (especially coal) with large variety and large humidity, and long service life of the sieve machine; i) Suitable for centralized computer control and can be used in automated production lines.
The structure and external dimensions of the inertial resonance probability sieve produced by Shendian are shown in Figure 5. The technical performance is shown in Table 5.
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The KZGS type inertial resonance probability screen produced by Luoyang Longrui Heavy Machinery Co., Ltd. (hereinafter referred to as Longrui Heavy Machinery Co., Ltd.) adopts a double-mass vibration system, which works under near resonance state and has high screening efficiency per unit area; It has strong adaptability to materials. The main vibration spring adopts shear rubber spring. It has low noise, long service life, good airtightness of the casing, small environmental pollution, and the working frequency is three times higher than the natural frequency of the vibration isolation system. It has good vibration isolation effect. The trajectory of the sieve machine is close to the ellipse of the straight line, and the work is stable. It is a good large-scale screening machine. The technical parameters are listed in Table 6.
There are 4 types of machine casings and 32 types of assembly. Different models can be selected according to the layout of the upper and lower transportation systems. The machine type and assembly type must be specified when ordering.
The probability sieve is mainly used in the input system of thermal power plants, and is also used in the coal, mining, metallurgical building materials and other industries to screen raw coal, ore and other materials, and is a new screening machine with high efficiency and large production capacity.
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