Multi-path hydraulic system of hydraulic excavator

A technology of hydraulic excavators and hydraulic systems, which is applied in the direction of earthmoving machines/shovels, construction, etc., can solve the problems of inability to control independently, increase in control instability factors, and inability to realize energy-saving control, and avoid energy consumption. Wasteful, flexible control effects

Pending Publication Date: 2019-01-18
CHANGAN UNIV
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design load port of the existing excavator hydraulic system circuit has the following disadvantages: it cannot be controlled independently; it cannot realize simultaneous control of pressure and flow, resulting in increased control instability factors; and it cannot realize energy-saving control.

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
  • Multi-path hydraulic system of hydraulic excavator
  • Multi-path hydraulic system of hydraulic excavator
  • Multi-path hydraulic system of hydraulic excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention is further described below in conjunction with accompanying drawing:

[0029] see Figure 1 to Figure 6 , a hydraulic excavator multi-channel hydraulic system, including a controller 4, an oil inlet pipe, an oil return pipe, a variable pump 1, a boom cylinder hydraulic system, an arm cylinder hydraulic system, a bucket cylinder hydraulic system, a swing motor hydraulic system and a walking Motor hydraulic system; the outlet of the variable pump 1 is connected to the oil inlet pipe through the pipeline, and the inlet of the variable pump 1 is connected to the oil return pipe through the pipeline; the hydraulic system of the boom cylinder, the hydraulic system of the arm cylinder, the hydraulic system of the bucket cylinder, and the hydraulic system of the swing motor The hydraulic system of the travel motor and the travel motor are both arranged between the oil inlet pipe and the oil return pipe;

[0030] The hydraulic system of the boom cylinder i...

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 multi-path hydraulic system of a hydraulic excavator. The multi-path hydraulic system comprises a controller, an oil inlet pipe, an oil return pipe, a variable pump, a movable arm oil cylinder hydraulic system body, a bucket arm cylinder hydraulic system body, a bucket cylinder hydraulic system body, a rotary motor hydraulic system body and a walking motor hydraulic system body; an outlet of the variable pump is connected with the oil inlet pipe through a pipeline, and an inlet of the variable pump is connected with the oil return pipe through a pipeline; the movablearm oil cylinder hydraulic system body, the bucket arm cylinder hydraulic system body, the bucket cylinder hydraulic system body, the rotary motor hydraulic system body and the walking motor hydraulicsystem body are arranged between the oil inlet pipe and the oil return pipe. Each system body comprises an independent overflow valve and a proportional valve, a loading port is independently controlled, and therefore control is more flexible; meanwhile, the variable pump is adopted as an executing element, data of sensors is collected through the controller to adjust the flow, input into the system, of the variable pump in time, energy waste is avoided, and energy-saving control is realized.

Description

technical field [0001] The invention belongs to the field of driving hydraulic excavators, and in particular relates to a multi-channel hydraulic system of a hydraulic excavator. Background technique [0002] As a kind of road maintenance machinery, hydraulic excavator has a wide range of application fields. However, the design load port of the existing excavator hydraulic system circuit has the following disadvantages: it cannot be controlled independently; it cannot realize simultaneous control of pressure and flow, resulting in increased control instability factors; and it cannot realize energy-saving control. Today, as the call for energy saving and environmental protection is getting higher and higher, energy saving protection is becoming more and more important to our life, and it is imminent to realize energy saving control. Contents of the invention [0003] The purpose of the present invention is to provide a hydraulic excavator multi-channel hydraulic system to ...

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): E02F9/22
CPCE02F9/2228E02F9/2235E02F9/2246
Inventor 叶敏李嘉波尤广辉石大维
Owner CHANGAN 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