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Hydraulic excavating energy saving system

An energy-saving system and hydraulic accumulator technology, which is applied in mechanically driven excavators/dredgers, earthmovers/shovels, construction, etc., can solve the problems affecting the energy recovery efficiency of the system and the many energy conversion links, etc. Achieve the effect of reducing power level, high power density and avoiding energy loss

Active Publication Date: 2013-02-06
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical solution, all braking kinetic energy is recovered and reused through multiple energy conversions, and there are many energy conversion links in the system, which affects the energy recovery efficiency of the system

Method used

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  • Hydraulic excavating energy saving system
  • Hydraulic excavating energy saving system
  • Hydraulic excavating energy saving system

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Embodiment Construction

[0052] Please refer to the attached figure 1 As shown, it shows the specific structure of the preferred embodiment of the present invention, which includes the boom drive cylinder 17 and the boarding mechanism 34, and also includes the oil-electric-hydraulic hybrid drive system 100, the hydraulic accumulator control unit 200, the dynamic Arm drive cylinder hydraulic control unit 300, boarding mechanism hydraulic control unit 400, inverter 1, battery 2, first check valve 11, second check valve 13, third check valve 14, shuttle valve 9, safety valve 10. Bucket hydraulic drive system 8 , stick hydraulic drive system 12 , first hydraulic accumulator 24 , second hydraulic accumulator 26 , and reducer 33 mechanically connected to boarding mechanism 34 .

[0053] Specifically, the interconnection relationship of each component is as follows:

[0054] The oil-electric-hydraulic hybrid drive system 100 includes an engine 3 connected to a coaxial mechanical transmission, an electric / ge...

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Abstract

The invention discloses a hydraulic excavating energy saving system. The hydraulic excavating energy saving system comprises a movable arm driving oil cylinder, a loading mechanism, an oil-electricity-liquid hybrid driving system, a hydraulic accumulator control unit, a hydraulic control unit of the movable arm driving oil cylinder, a hydraulic control unit of the loading mechanism, a first one-way valve, a second one-way valve, a third one-way valve, a first hydraulic accumulator and a second hydraulic accumulator. The hydraulic excavating energy saving system combines the advantages of an oil-electricity hybrid power system and a hydraulic hybrid power system in the aspect of a power system, can meet the requirements of load on high power density and high energy density at the same time, and conforms to a principle of minimizing an energy transformation link in the aspect of energy recovery and recycle; and the hydraulic accumulators and a storage battery are shared by a power system and an energy recovering system. Therefore, the working efficiency of an engine can be improved, the energy consumption and loss of the energy recovery system can be reduced, and the work stability of the engine cannot be influenced.

Description

technical field [0001] The invention relates to the technology in the field of drive systems, in particular to a hydraulic excavation energy-saving system based on oil-electric-hydraulic hybrid power and energy recovery technology. Background technique [0002] As one of the most important construction machinery models for national infrastructure, hydraulic excavators have been widely used in construction, transportation, water conservancy, mining and military fields. The energy saving and emission reduction of hydraulic excavators has aroused people's widespread attention and attention. The low efficiency of the engine and the hydraulic system is the main reason for the low energy utilization of the hydraulic excavator, so the energy saving research of the power system and the hydraulic system has always been the research focus of the hydraulic excavator. [0003] The working conditions of hydraulic excavators are complex, and the load changes drastically. Hybrid technolog...

Claims

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Application Information

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IPC IPC(8): E02F9/20E02F9/22E02F3/42
Inventor 林添良
Owner HUAQIAO UNIVERSITY
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