Hydraulic rotary braking energy-saving control system

Abstract

The invention discloses a hydraulic rotary braking energy-saving control system. The hydraulic rotary braking energy-saving control system comprises an oil tank, an engine, a first variable pump, an electromagnetic directional control valve, a three-position four-way directional control valve, a first one-way valve, an energy accumulator, a second variable pump, a first motor, a first pilot operated directional control valve, a second one-way valve, a rotary motor, a second overflow valve, a fourth one-way valve, a second pilot operated directional control valve, a third pilot operated directional control valve, a third one-way valve, a clutch, a speed increasing gear, a coupler, a generator, a transformer, a storage battery, a motor-operated switch, a third overflow valve, a fifth one-way valve, a fourth pilot operated directional control valve, a controller, a first overflow valve and a motor. On the basis of an energy recycling device, a novel energy storage mode is added for the hydraulic rotary braking energy-saving control system, so that energy of high braking torque generated during rotary braking every time is converted, and is stored in the storage battery in the form of electric energy, and the energy recycling efficiency in the rotary braking process can be high.

Description

technical field [0001] The invention relates to an energy-saving control system for engineering machinery, in particular to a hydraulic slewing brake energy-saving control system for a hydraulic excavator with a hydraulic slewing system. Background technique [0002] As one of the important equipment of construction machinery, hydraulic excavator has harsh working environment, high energy consumption, and serious exhaust emissions. Research on energy saving and emission reduction is the focus and difficulty in this field. The deceleration and braking torque of the slewing mechanism of the excavator is large and the frequent slewing action will inevitably cause a large amount of energy loss. At the same time, it will also cause system heating, cavitation and other defects in the hydraulic system, which will directly lead to the reduction of the service life of the excavator. [0003] In a standard working cycle of the excavator, there are two slewing movements. According to ...

AI Technical Summary

Problems solved by technology

The deceleration and braking torque of the slewing mechanism of the excavator is large and the frequent slewing action will inevitably cause a large amount of energy loss. At the same time, it will also cause system heating, cavitation and other defects in the hydraulic system, which will directly lead to the reduction of the service life of the excavator.

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