Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Movable arm potential energy recovery method and apparatus of hydraulic excavator

A potential energy recovery and maneuvering arm technology, which is applied to fluid pressure actuating devices, mechanically driven excavators/dredgers, circuit devices, etc., can solve problems such as low efficiency, large fluctuations in hydraulic oil pressure, and low energy recovery efficiency. To achieve the effect of reducing pressure fluctuation, improving efficiency and improving work efficiency

Inactive Publication Date: 2009-05-20
CENT SOUTH UNIV
View PDF0 Cites 95 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the energy recovery time during the lowering process of the hydraulic excavator arm is usually less than 2 seconds, and the pressure fluctuation of the hydraulic oil during the recovery process is large, the generator works in a low efficiency area, and the efficiency of energy recovery is very low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Movable arm potential energy recovery method and apparatus of hydraulic excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the oil-electric hybrid hydraulic excavator arm potential energy recovery device includes a hydraulic cylinder 3, a controller 1, an accumulator 2, a two-position two-way solenoid valve 4, 5 and 7, and a two-position two-way proportional valve 6 ( Wherein the two-position two-way solenoid valves 4, 7 and 5 and the two-position two-way proportional valve 6 respectively correspond to the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve) and the generator 9 , hydraulic motor 10, inverter 11, accumulator 12 and oil tank 8, two-position two-way solenoid valves 4, 5 and 7 are normally closed solenoid valves, two-position two-way proportional valve 6 is a normally closed proportional valve, two The two-position two-way solenoid valve 4 is installed between the oil port of the rod chamber of the hydraulic cylinder 3 and the fuel tank 8, the two-position two-way solenoid valve 7 is installed betwee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for recovering potential energy of a movable arm of a hydraulic digging machine and a device thereof. The method comprises the following steps: firstly, the potential energy is stored through an energy accumulator in the retraction process of a hydraulic cylinder; and secondly the stored energy in the energy accumulator drives a generator to generate electricity, thereby realizing the recovery of the potential energy of the movable arm of the hydraulic digging machine. A mode for storing the potential energy is to convert the potential energy into pressure energy. The energy accumulator and the generator are connected through a proportioning valve so as to control the rotational speed of the generator. The method realizes high-efficiency recovery of the potential energy of the movable arm of the hydraulic digging machine; the principle of the method is to skillfully change the working time of hydraulic oil for power generation through the function of energy storage of the energy accumulator and provide effective buffering for recovering the potential energy; in addition, through the throttling control of the proportioning valve, the method reduces pressure fluctuation of the hydraulic oil in the power generation process, realizes the adjustment of the working rotational speed of the generator, improves the working efficiency of the generator and further improves the efficiency of energy recovery.

Description

technical field [0001] The invention belongs to the technical field of mechatronics, and relates to a method and a device for recovering potential energy of a hydraulic excavator arm. Background technique [0002] The hydraulic excavator is a typical periodic operation equipment, and the lowering of the boom is a typical part of its work cycle. When the boom of the hydraulic excavator is lowered, the ordinary hydraulic excavator adjusts the lowering speed of the working arm through the opening of the control valve, and stops the lowering movement of the boom by closing the control valve. Ordinary hydraulic excavators usually do not have an energy recovery device, and most of the potential energy released during the lowering of the boom is consumed on the control valve, resulting in a waste of energy. [0003] Since the hybrid hydraulic excavator is equipped with a battery and a generator, it can theoretically recover the potential energy during the lowering of the hydraulic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/14H02J7/14E02F3/38
Inventor 黄中华刘少军
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com