Oil hybrid system for excavator with energy differential recovery

A hybrid power system, energy-poor technology, applied in earthmoving machines/shovels, construction, etc., can solve the problems of energy conversion, low storage efficiency, large throttling loss of control valves, and difficulty in wide application of the system. Conducive to energy storage, less energy conversion links, flexible and convenient control

Active Publication Date: 2012-07-18
ZHEJIANG UNIV
View PDF10 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parallel hybrid hydraulic excavator systems of Komatsu and Hitachi use a separate hydraulic motor-generator to recover the potential energy of the boom lowering. The hydraulic motor of this system is connected in parallel in the oil circuit. throttling loss
The above hydraulic excavator oil-electric hybrid system and i

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
  • Oil hybrid system for excavator with energy differential recovery
  • Oil hybrid system for excavator with energy differential recovery
  • Oil hybrid system for excavator with energy differential recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the excavator oil-hydraulic hybrid power system with energy differential recovery includes a controller 1, an engine 2, a transfer case 3, a main pump 4, an oil tank 5, a first one-way valve 6, a second one-way valve 7, Hydraulic pump 8, hydraulic motor 9, hydraulic control reversing valve 10, third check valve 11, first pressure sensor 12, multi-way valve 13, fourth check valve 14, electromagnetic reversing valve 15, boom hydraulic cylinder 16. Accumulator 17, electro-hydraulic proportional valve 18, fifth one-way valve 19, sixth one-way valve 20, second pressure sensor 21, pilot operating handle 22; input of transmission shaft of engine 2 and transfer case 3 The first output shaft of the transfer case 3 is connected with the transmission shaft of the main pump 4, the second output shaft of the transfer case 3 is connected with the t...

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 an oil hybrid system for an excavator with energy differential recovery, belonging to the technical field of energy-saving control of a hydraulic excavator, including: a controller, a transfer case, a variable pump, a variable motor, a reversing valve, a one-way valve and an accumulator, so that the energy differential recovery function and the oil hybrid function can be combined hydraulically. The accumulator is used as the energy storage unit, the variable pump and the variable motor are used as the auxiliary power unit, and power coupling is completed by the transfer case and the engine. The controller solves the matching problem of master and auxiliary power sources according to control rules, to stabilize the engine to work in the high-efficiency fuel zone. In the invention, energy from the hydraulic system and power system of the excavator can be maximally recovered, distributed and reused, the working efficiency of the engine can be optimized, the fuel economy of the excavator can be improved, and the system exhaust can be reduced.

Description

technical field [0001] The invention relates to an excavator energy recovery system and an oil-fluid hybrid power system, and is an excavator oil-fluid hybrid power system with energy differential recovery. Background technique [0002] The power system of ordinary excavators is driven by the engine alone to drive the hydraulic pump, and the working conditions are completely determined by the load of the main pump. Once the load fluctuates greatly, the engine operating point will also fluctuate greatly, and it cannot work stably in the high-efficiency fuel area, resulting in energy waste and increased fuel consumption. In addition, ordinary excavators do not recycle the boom’s lowering energy, causing it to be lost in the form of heat energy at the throttle, which not only causes the system energy to be lost in vain, but also increases the temperature rise of the system, causing cavitation and other hydraulic system defects. Therefore, the development of an excavator hybrid...

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
IPC IPC(8): E02F9/22
Inventor 管成肖扬来晓靓王飞
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap