A driving system for automatic energy recovery and reuse of construction machinery turntable

Abstract

The invention discloses a driving system for automatic recovering and recycling of energy of a rotary table of an engineering machine. The driving system is provided with an internal combustion engine, a driving pump, a guide pump, a multitandem valve, a hydraulic control one-way valve, a one-way valve, an overflowing valve, an electromagnetic directional valve, a hydraulic operated directional valve, a shuttle valve, a hydraulic energy storage device, the rotary table and the like. The rotary table is controlled by a rotary operation handle to conduct rotation starting and brake work circulation stopping; in the process, due to the inertia of the rotary table, hydraulic oil with high pressure is generated at the starting moment and in the braking process, the hydraulic oil flows into the hydraulic energy storage device through a control valve, and therefore energy losses are avoided; when the pressure of the energy storage device is higher than the pressure of a rotary motor, the pressure can be automatically released through the hydraulic operated directional valve and the like, motion of the rotary table is driven in an assisting manner, and therefore the energy losses of the hydraulic pump is reduced accordingly. By means of the driving system of the rotary table, the energy in the rotary table starting and braking process can be recovered and recycled, the energy using rate is improved, and the energy losses are reduced.

Description

technical field [0001] The invention relates to the technology in the field of hydraulic control systems, in particular to a drive system for automatically recovering and reusing the energy of a construction machinery turntable. Background technique [0002] With the development of the global economy, global warming and the energy crisis are becoming more and more serious. Therefore, governments of various countries have put forward new demands in terms of improving energy efficiency, developing new energy sources, saving energy and reducing emissions. Construction machinery plays an important role in national production and construction, but it is also a large energy consumer. Research on energy recovery and reuse in construction machinery has an important and positive effect on improving the efficiency of construction machinery and reducing energy consumption. [0003] During the working process, the construction machinery needs to continuously reciprocate and turn to comp...

AI Technical Summary

Problems solved by technology

However, most of the existing research focuses on the recovery of braking energy, and the recovery of starting energy is limited to the scheme and simulation stage; and various energy recovery and reuse systems based on hydraulic accumulators, although they can automatically recover starting and braking Kinetic energy, but when the energy is reused, it needs to be controlled separately, and it cannot be released automatically according to the working conditions, which increases the difficulty and complexity of the control

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