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Hydraulic system of hybrid power full-hydraulic excavator based on CPR network

A network mixing, hydraulic system technology, applied in the direction of fluid pressure actuation system components, earth movers/shovels, mechanical equipment, etc., can solve the problems of insignificant energy saving effect and low energy recovery rate, and improve fuel economy. The effect of low pollution, low pollution, and emission reduction

Inactive Publication Date: 2011-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low energy recovery rate and inconspicuous energy-saving effect of the existing oil-electric hybrid power system, the present invention provides a hydraulic system based on a CPR network hybrid full-hydraulic excavator

Method used

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  • Hydraulic system of hybrid power full-hydraulic excavator based on CPR network
  • Hydraulic system of hybrid power full-hydraulic excavator based on CPR network

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment consists of engine 1, quantitative pump 2, safety valve 4, high pressure accumulator 5, electromagnetic reversing valve 6, left travel hydraulic pump / motor control assembly 7, left travel hydraulic pump / motor 9, Right traveling hydraulic pump / motor control unit 11, right traveling hydraulic pump / motor 10, slewing mechanism hydraulic pump / motor control unit 13, slewing mechanism hydraulic pump / motor 12, central controller 17, constant pressure variable pump 24, first working Mechanism cylinder 15, second working mechanism cylinder 28, third working mechanism cylinder 29, fourth working mechanism cylinder 31, first hydraulic transformer 16, second hydraulic transformer 30, third hydraulic transformer 32, first hydraulic transformer control assembly 14 , the second hydraulic transformer control assembly 34 and the third hydraulic transformer control assembly 33;

[0015] The oil i...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination figure 1 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that the relief valve assembly 20 is added, the oil outlet of the quantitative pump 2 communicates with the oil inlet port of the relief valve assembly 20, and the outlet of the relief valve assembly 20 The oil port is connected to the oil tank 23. Other compositions and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination figure 1Describe this embodiment, the difference between this embodiment and the second embodiment is that a safety valve assembly 19 is added, the oil outlet of the constant pressure variable pump 24 communicates with the oil inlet port of the safety valve assembly 19, and the oil outlet of the safety valve assembly 19 The port connects to the tank 23. Other compositions and connection methods are the same as those in the second embodiment.

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Abstract

The invention relates to a hydraulic system of a hybrid power full-hydraulic excavator based on a CPR network, which belongs to the hydraulic system of excavators and solves the problems of low energy recovery and poor energy saving effect of the traditional fuel-electricity hybrid power system. A constant pressure variable output pump and a fixed displacement pump are connected with an output shaft of an engine and form a constant pressure fuel source together with a high pressure accumulator and a safety valve, and a central controller controls the engine to intermittently work in the best fuel saving region. Three double-way variable hydraulic pumps / motors and a hydraulic transformer are connected to the constant pressure fuel source and directly drive a working mechanism, and the central controller respectively controls the steering direction and the output volume of each hydraulic pump / motor and the transformer ratio of the hydraulic transformer through control assemblies. The system is suitable for the excavator; and only by retrofitting and transforming the traditional excavator, the fuel saving property of vehicles can be obviously increased, the emission of tail gases is reduced, the power performance of the vehicles is enhanced, and the service life of the engine and a brake device is prolonged.

Description

technical field [0001] The invention relates to a hydraulic system of an excavator, in particular to a hydraulic system of a hybrid full hydraulic excavator based on a CPR network. Background technique [0002] Traditional excavators are complex in structure, difficult to manufacture, and expensive. In recent years, with the development of industrial technology worldwide, the problems of energy shortage and environmental pollution have become increasingly serious. Excavators have high fuel consumption and poor emissions, and their energy saving and emission reduction issues cannot be ignored. Energy-saving research helps to reduce system heat generation, simplify system design, improve system equipment reliability and working life, and reduce system installed power, thus helping to save equipment manufacturing and maintenance costs to a certain extent. The energy recovery rate of the existing hybrid electric power system is low, and the energy-saving effect is not obvious....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22E02F9/20F15B1/02F15B21/14
Inventor 姜继海于安才刘成强于斌
Owner HARBIN INST OF TECH
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