Underground carry-scraper hybrid power system with energy recovery

Abstract

The invention discloses an underground carry-scraper hybrid power system with energy recovery. An engine outputs power outwards through a transfer case, one part of the power is provided for a working system hydraulic pump, the other part of the power drives a generator / motor, the generator / motor is in a generator mode, the generator can charge a battery unit, and the generator and the battery unit can independently or simultaneously drive a front driving motor and a rear driving motor; the battery unit drives the front drive motor and the rear drive motor, the front drive motor and the rear drive motor convert kinetic energy of a vehicle into electric energy, the electric energy is transmitted into a circulating type gas-liquid energy storage unit through the generator / motor and a transfer case, energy storage is achieved, and the generator / motor is in a motor mode; the circulating type gas-liquid energy storage unit outputs power to the working system hydraulic pump and the generator / motor through the transfer case to realize energy release; and the engine, the battery unit and the gas-liquid energy storage unit can drive the front drive motor and the rear drive motor independently or at any two or at the same time. The energy density of energy storage is improved and the charging and discharging times of the battery are reduced.

Description

technical field [0001] The invention relates to the technical field of mining machinery and engineering machinery, in particular to an underground scraper hybrid power system with energy recovery. Background technique [0002] The traditional scraper power system uses a diesel engine as the power source, and provides driving force for the underground scraper through components such as a hydraulic torque converter, a gearbox, and a drive axle, and includes components of the working mechanism, steering system, and braking system. The hydraulic oil pumps are directly powered by the engine through the hydraulic torque converter. The load power fluctuates widely under the typical working conditions of the scraper. In order to meet the power demand of the scraper, the traditional power system design must meet the maximum load power. However, the high-power load condition takes a short time, and the engine is under low load for a long time. As a result, the traditional power syste...

AI Technical Summary

Problems solved by technology

However, the power density and energy density of the battery in the energy storage device are limited, and the ability of the transmission system to reversely transmit power to store energy in real time is poor, the stored energy is limited, and frequent charging and discharging increase the load and impact of the battery and motor , so that the service life of the battery is reduced; the supercapacitor has the advantage of fast charging and discharging, but its energy density is limited, and it usually needs to be used in combination with the battery, and its expensive price hinders large-scale engineering applications

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