A parallel permanent magnet motor intelligent semi-direct drive scraper conveyor

Abstract

The invention discloses an intelligent semi-direct-drive scraper conveyor with parallel permanent magnet motors. The intelligent semi-direct-drive scraper conveyor comprises a scraper conveyor body, amovable discharging groove, a parallel double-permanent-magnet semi-direct-drive motor coupling driving system and a control system, wherein the permanent magnet semi-direct-drive motors are connected with a bevel gear coupling transmission box through a zigzag spring coupler; and a large bevel gear shaft is connected with one end of a scraper conveyor chain wheel through a zigzag spring coupler.According to the intelligent semi-direct-drive scraper conveyor, a parallel double-motor driving structure with the same side of a machine head is adopted, and space can be saved; the permanent magnet semi-direct-drive motors are adopted, the transmission ratio can be increased while the size of the motors is reduced, then the bevel gear coupling transmission box is used for coupling transmission, the transmission ratio is further increased, the rotating speed is reduced, and finally the purpose of dragging the scraper conveyor body to work normally is achieved; and when the single-motor working mode cannot meet the torque required by dragging loads, the permanent magnet semi-direct-drive motors can improve driving force to meet the load requirements through switching of the single-motor / double-motor working mode.

Description

technical field [0001] The invention relates to an intelligent semi-direct drive type scraper conveyor with parallel permanent magnet motors, which belongs to the technical field of underground transportation. Background technique [0002] ‌The scraper conveyor is one of the "three machines" of key mechanical equipment in the fully mechanized mining face of the coal mine. Forward support and other functions, its performance directly determines the efficiency and cost of underground coal mining, and the drive system is the primary condition to ensure the stable and efficient operation of the scraper conveyor. [0003] The existing scraper conveyor drive system generally uses an asynchronous motor as the power source, and realizes low-speed and high-torque output with the help of a reducer. The existence of a reducer will cause the drive system to have a long drive chain, low efficiency, frequent maintenance, and prone to failure. [0004] At present, the scraper conveyor in ...

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Problems solved by technology

[0003] The existing scraper conveyor drive system generally uses asynchronous motor as the power source, and realizes low-speed and high-torque output with the help of a reducer. The existence of a reducer will cause the drive system to have a long transmission chain, insufficient efficiency, frequent maintenance, and prone to failure

[0004] At present, the scraper conveyor in the fully mechanized mining face is usually driven by a single motor at the head or two motors are arranged at the head and the tail. The single motor drive has the problem of insufficient power, while the dual motor drive has the problem of power imbalance. , can not give full play to the efficiency of the motor

At present, most fully-mechanized mining working faces in underground mines adopt the "three-shift" working method. At the same time, the thickness of the coal seam cut by the shearer and the cutting speed are all changing, so the scraper conveyor is also under different working conditions. , if the dual machine drive is used all the time, it will cause a waste of electric energy

[0005] During the operation of the scraper conveyor, when a large piece of coal falls into the chute of the scraper conveyor, it is easy to cause the chain to jam and the sprocket cannot rotate, but at this time the motor is still working, and the three-phase current of the stator rises sharply In the end, the motor may be burned, resulting in an accident of shutting down the fully mechanized mining face for maintenance

[0006] When the coal and gangue transported by the scraper conveyor are unloaded through the machine head, there is no guide device, so it is difficult to control the direction of the fall, which will bring impact to the chain of the trough reloading machine, and at the same time, some coal and gangue will continue to stick to the chain and On the scraper, it accumulates at the front of the machine head and cannot be transported away in time

[0007] The motors used in the underground are all flameproof motors. After the motor flameproof transformation, the heat dissipation problem has been very serious. Therefore, the motor temperature will be overheated during the operation of the scraper conveyor system, and the motor may be overheated under heavy load conditions. burn out

In order to solve this problem, an air-cooling device or a water-cooling device is usually installed on the flameproof motor on the market, and the way of adding a cooling device will increase the volume of the motor and increase the footprint

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