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Explain the design of the belt conveyor speed control system

by:YiFan     2021-06-14
We also need to pay attention to the design of the belt conveyor speed control system due to the special nature of the roller motor. Belt conveyors include universal mobile type, underground selection type, fixed type for open-pit mines, special structure type, removable conveyor, special transfer function type for loaders, large inclination conveyors, etc. Generally speaking, short-distance in-plant conveyors can be used Complete level, up or down, the reversible pattern belt conveyor can be used to convey materials in two directions. Stainless steel chain plate assembly line, metal transmission chain plate, heat treatment furnace high temperature resistant chain plate; stainless steel chain plate; conveyor chain plate; tunnel kiln chain plate ; Drying machine chain plate; coating equipment chain plate; spraying equipment chain plate; washing machine chain plate; food chain plate; food cleaning conveyor chain plate; oil spray cooling chain plate; drying furnace stainless steel chain plate, industrial conveyor chain plate, Baffle loading conveyor belt; chain conveyor belt; fruit and vegetable cleaning chain plate; quick-freezing machine chain network; quick-freezing horseshoe mesh chain; vegetable dehydration line equipment special loading conveyor chain network, etc. First, the same power (refers to the work done by the object in a unit of time) How much) the rated current of the drum motor is much larger than the rated current of the ordinary cage asynchronous motor, generally more than twice that of the ordinary cage asynchronous motor. Secondly, the belt conveyor may be blocked. Generally, the blocking current of the drum motor is not large, about 3 times its rated current, but for the inverter, the current margin is greater than that of the general system. The selection of the reel motor is the same as that of the general asynchronous motor, but some issues are also considered. Since the drum motor is mostly installed under the workbench, in many cases, there are several cooling devices. In addition, because there are inevitably higher harmonics in the output voltage of the inverter, and the higher harmonics increase the loss of the motor, the temperature rise of the motor should be paid enough attention. Higher-order harmonics will also increase the noise of the motor, but practice shows that due to the large noise of the production line itself, the general noise problem is not prominent. Its purpose is to remove the inverter from the power supply after the circuit breaker is disconnected, so as to prevent the inverter from working on its own when it is re-powered under the control of external terminals. In order to protect the safety of equipment and personnel, the AC reactor can suppress the surge in the input power supply and circuit, and can greatly reduce the impact of the unbalanced power supply voltage on the inverter. In addition, it also plays a certain role in improving the power factor. The power filter is used to suppress or reduce the conducted interference in the circuit. The high-frequency noise filter is used to suppress or reduce the high-frequency radiation interference in the circuit. As one of the transmission accessories of the inverter. Belt conveyors include general mobile type, underground selection type, fixed type for open pit mines, special structure type, removable conveyor, special transfer function type for loaders, large angle conveyor, etc. Generally speaking, short-distance in-plant conveyors can be used To complete the level, up or down, the reversible pattern belt conveyor can be used for two-way material conveying. The belt conveyor has the advantages of large conveying capacity, simple structure, convenient maintenance, standardized parts, etc. It is widely used in mining and metallurgy (content: from ore Extraction of metals or metal compounds), coal and other industries, used to transport loose materials or finished articles, according to the requirements of the transportation process, can be transported by a single unit, or composed of multiple units or combined with other conveying equipment to form a horizontal or inclined conveying system. In order to meet the needs of different layout types of operation lines, it is suitable for conveying powdery, granular, small lumps and bagged materials with a bulk density of less than 1.67/ton/m3 and easy to extract, such as coal and crushed materials. Stone, sand, cement (material: powdery hydraulic inorganic cementitious material), fertilizer, grain, etc. The temperature of the delivered material is less than 60°C. Because the table plate of the belt conveyor needs to be used repeatedly, it is rarely used alone. Instead, it forms a horizontal or vertical circulation system with various special machines such as jacking translators and jacking indexers. Like AC reactors, DC reactors can suppress surges in input power and circuits. And it can greatly weaken the influence of the unbalanced power supply voltage on the inverter. Braking resistance is essential, because in the operation of the production line, the motor inevitably starts and brakes frequently.
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