Multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and control method

A technology of hybrid drive and motor controller, which is applied in earth movers/excavators, construction, etc., can solve the problems of difficult to achieve zero emission, high cost, complicated control, etc., and achieve zero emission, fast dynamic response, good The effect of speed regulation performance

Active Publication Date: 2016-08-10
HUAQIAO UNIVERSITY
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  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide an electro-hydraulic hybrid drive system and control method for a multi-ener...

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  • Multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and control method

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Embodiment Construction

[0059] Please refer to figure 1 As shown, it shows the specific structure of the preferred embodiment of the present invention, including a power battery 1, a super capacitor 2, an energy management unit 3, a first motor controller 4, a second motor controller 5, a third motor Controller 6, first power motor 7, second power motor 8, pilot pump 9, quantitative pump 10, first clutch 11, quantitative pump / motor 12, second clutch 13, third power motor 14, one-way valve 17 , Pilot operating handle 18, hydraulic accumulator 27, first pressure sensor 15, second pressure sensor 16, third pressure sensor 24, fourth pressure sensor 25, fifth pressure sensor 26, sixth pressure sensor 31, seventh Pressure sensor 32, first electromagnetic reversing valve 20, second electromagnetic reversing valve 21, third electromagnetic reversing valve 22, fourth electromagnetic reversing valve 30, first relief valve 19, second relief valve 23, The third overflow valve 29, the open center six-way propor...

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Abstract

The invention discloses a multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and a control method. The multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system comprises a power battery, a super capacitor, an energy management unit, a power motor, a motor controller, a forerunner operating handle, a hydraulic energy accumulator, an oil tank, a hydraulic pump/motor, a plurality of electromagnetic reversing valves, a plurality of pressure sensors, an overflow valve, an open center six-way proportion direction valve, a boom cylinder and the like. According to the multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and the control method, the power battery, the super capacitor and the hydraulic energy accumulator serve as composite energy sources, the energy density is ensured through the power battery, the instantaneous large power of an electric driving system is provided or absorbed by the super capacitor, and the instantaneous large power of a hydraulic driving system is provided or absorbed by the hydraulic energy accumulator; and a power system is driven by the power motor and the hydraulic pump/motor in a collaborated and mixed mode, multiple power composite modes are achieved by fully utilizing the stepless speed regulating characteristics of the power motor and the hydraulic pump/motor, and thus the requirements for the power of various complex working conditions of a hydraulic excavator are met.

Description

technical field [0001] The invention relates to the technology in the field of energy saving and emission reduction of construction machinery, in particular to an electro-hydraulic hybrid drive system and control method for a multi-energy multi-motor hydraulic excavator. Background technique [0002] Energy saving and emission reduction are of great significance to construction machinery, among which hydraulic excavator is a kind of construction machinery with high power and complex working conditions, and its total utilization rate of energy is low. Therefore, the realization of energy saving and emission reduction of hydraulic excavators has always been the goal pursued by the industry. Among them, hybrid drive technology and pure electric drive technology are current research hotspots. [0003] Hybrid drive technology has achieved certain results in the energy saving and emission reduction of construction machinery, but it also has the characteristics of high cost, compl...

Claims

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Application Information

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IPC IPC(8): E02F9/20E02F9/22
CPCE02F9/2091E02F9/2221E02F9/2246
Inventor 林添良黄伟平任好玲付胜杰陈其怀刘强缪骋陈强
Owner HUAQIAO UNIVERSITY
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