A heavy-duty speed-regulating starting device and its control method

Abstract

A heavy-duty speed-regulating starting device, the device includes a box body, a control mechanism, a transmission mechanism and a pressure oil control system; the control mechanism includes a left piston cylinder and a right piston cylinder; The left and right friction plate groups are controlled by the left piston cylinder and the right piston cylinder respectively, and the left and right piston cylinders are independently controlled by the electromagnetic reversing valves B and C of the pressure oil control system; when starting, the electromagnetic reversing valve When B and C are powered off, the pressure oil enters the left and right piston cylinders at the same time, pushing the left and right friction plate sets to engage, and the double friction plate set provides the large torque required for the starting of the driven shaft; after the start is completed, only the electromagnetic reversing valve B When the power is turned on, the left piston cylinder returns oil to separate the left friction plate group, and only the right friction plate group provides the small torque for the smooth operation of the driven shaft; the invention realizes the starting of heavy-duty scraper machines, belt conveyors and other heavy-duty equipment And the automatic switching of different torques required for smooth operation is very practical.

Description

technical field [0001] The invention relates to the technical field of heavy-duty speed-regulating starting devices, in particular to a heavy-duty speed-regulating starting device and a control method thereof, especially suitable for speed regulation and starting of heavy-duty scraper machines, belt conveyors or other heavy-duty equipment . Background technique [0002] In the world energy pattern, the role of coal is very important. Coal often needs to be transported by scraper conveyors and belt conveyors, and the start and smooth speed regulation process of scraper conveyors and belt conveyors need to be controlled by liquid viscous devices. When the conveyor stops unexpectedly, a large amount of coal on it will cause the liquid viscous device to start with heavy load or overload, and the overload factor can be as high as 2.5 to 3.0, resulting in a large starting torque during the starting process. Usually the starting torque of the viscous device is selected according ...

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Problems solved by technology

Usually the starting torque of the viscous device is selected according to the rated load of the conveyor, but because the conveyor often needs to be started under overload conditions, the selected viscous device often cannot meet the requirements; if a viscous device with a large torque is directly selected, Although there is no problem in the starting process, it is difficult to achieve speed regulation by adjusting the torque of the speed clutch when running smoothly

[0003] So far, the Chinese patent application CN104500615A has proposed a high-power speed-regulating clutch, but it is difficult to realize sensitive speed regulation by adjusting the torque when the clutch is running smoothly; The hydraulic viscous speed control device for load start can realize the switching of different torques required for the start and smooth operation of heavy-duty scraper conveyors and belt conveyors, but the structure of concentric arrangement (parallel connection) of friction plate groups with different diameters requires two passive Drum and four different sizes of friction plates, increasing the number of connecting parts, parts and assembly processes

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