Brakeable hydraulic control system for dual-mode drive of belt conveyor

Abstract

The invention relates to a double-mode driven brake hydraulic control system of a belt conveyor. The double-mode driven brake hydraulic control system of the belt conveyor comprises a hydraulic station connected with a hydraulic motor and a PLC connected with a drive motor. The hydraulic station comprises an oil tank, a power oil path and an electro-hydraulic directional valve. One end of the power oil path is connected with the electro-hydraulic directional valve, and the other end of the power oil path is connected with the oil tank. Two oil outlets of the electro-hydraulic directional valveare connected with the hydraulic motor. A first shuttle valve is connected between the two oil outlets of the electro-hydraulic directional valve. A middle oil port of the first shuttle valve is connected with a second shuttle valve. A middle oil outlet of the second shuttle valve is connected with a brake oil cylinder of a hydraulic brake. The other oil port of the second shuttle valve is connected with a gear pump which is connected with a brake motor. The brake motor is connected with am variable frequency inverter which is connected with the PLC. The problem of power unbalance of two-motor driving is solved, the hydraulic system can adjust output torque and rotation speed automatically, and it is ensured that drive units are the same in output force and rotation speed; effective braking can be achieved; and the hydraulic system can absorb part of impact loads.

Description

technical field [0001] The invention belongs to the technical field of belt conveyors, and in particular relates to a brakeable hydraulic control system driven by dual modes of a belt conveyor. Background technique [0002] A belt conveyor is a friction driven machine that transports material in a continuous manner. It is mainly composed of frame, conveyor belt, idler roller, roller, tensioning device, driving device and so on. The traction force of the belt conveyor is transmitted through the friction between the drive roller and the belt, and the drive roller is driven by the drive device. The drive device is actually an energy conversion device, which can be divided into many types according to the possible conversion methods of energy. The so-called dual-mode drive is: the drive motor drives one drum, and the hydraulic motor drives the other drum. There is a hydraulic brake on the hydraulic motor. Simply put, it is an electric drive plus a hydraulic drive. The hydrauli...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a brakeable hydraulic control system for dual-mode driving of belt conveyors, which solves the problem that the hydraulic system of the current dual-drive device only provides driving force and cannot solve the power imbalance and braking effect of the dual-machine drive bad question

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