Braking energy recycling system, braking energy recycling method and crane

Abstract

The invention relates to a braking energy recycling system, a braking energy recycling method and a crane, wherein the braking energy recycling system comprises an engine, a power coupler connected with the engine, and a clutch and a gearbox in parallel connection with the power coupler. The clutch is connected with a hydraulic pump / motor; the hydraulic pump / motor is in parallel connection with an energy accumulator and a hydraulic oil tank; and the gearbox is connected with a transmission mechanism. In the braking process, braking mechanical energy is converted to hydraulic energy by the transmission mechanism, the gearbox, the power coupler, the clutch and the hydraulic pump / motor, and the hydraulic energy is stored in the energy accumulator to realize the braking energy recovery; and in the starting, accelerating and climbing processes, the energy stored in the energy accumulator is converted into the mechanical energy by the hydraulic pump / motor, and the mechanical energy drives the whole vehicle to move through the transmission of the gearbox, thereby satisfying the power requirements and realizing the energy utilization. The system can effectively recycle the energy generated in the braking process and thus improve the whole machine fuel economy and the whole machine power performance and braking performance.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a braking energy recycling system, a recycling method and a crane. Background technique [0002] Crane products have large installed power, heavy vehicle weight, and are widely used. They are often used in urban areas and between cities. During the driving process, there are frequent starting, accelerating, braking, and climbing processes. [0003] During the starting and climbing process of crane products, due to the heavy weight of the whole machine, the engine speed is generally low, and it is usually in the non-optimal fuel economy zone of the engine, which will inevitably lead to poor fuel economy of the whole machine, difficulty in starting, and insufficient climbing ability. [0004] During the braking process of crane products, mechanical friction brakes are used. Through the mutual extrusion and friction of braking parts and moving parts, heat is generated and consum...

AI Technical Summary

Problems solved by technology

[0003] During the starting and climbing process of crane products, due to the heavy weight of the whole machine, the engine speed is generally low, usually in the non-optimal fuel economy zone of the engine, which will inevitably lead to poor fuel economy of the whole machine, difficulty in starting, and insufficient climbing ability

[0004] During the braking process of crane products, mechanical friction brakes are used. Through the mutual extrusion and friction of braking parts and moving parts, heat is generated and consumed in the air; Higher, resulting in huge waste of energy during frequent braking

[0005] Moreover, the frequent start and stop of the crane makes the engine often in the low-efficiency zone, and frequent braking and starting also consume a lot of energy. However, the existing crane products fail to recover and utilize the energy during the braking process. The improvement of power performance is basically achieved by matching high-power engines, and the fuel economy of the whole machine is low during driving.

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