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

Hydraulic excavator boom circuit and its control method based on hydraulic transformer

A technology of a hydraulic transformer and a control method, which is applied in the field of hydraulic excavators, can solve the problems of increasing the overall size of the hydraulic cylinder of the boom, increasing the production cost, and increasing the installed power of the system, so as to realize the four-quadrant working characteristics, reduce the installed power, The effect of avoiding throttling losses

Active Publication Date: 2015-10-07
山西氢电科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former will increase the overall size of the hydraulic cylinder of the boom, and the latter will increase the size of the hydraulic pressure transformer, which will increase the installed power of the system and increase the production cost

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
  • Hydraulic excavator boom circuit and its control method based on hydraulic transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 1 As shown, the hydraulic excavator arm circuit based on hydraulic transformer includes power source 1, pilot oil source 2, low-voltage network 3, high-voltage network 4, hydraulic transformer control component 5, hydraulic transformer 6, first safety valve 7, hydraulic pressure Transformer distribution plate rotation angle sensor 8, the first electromagnetic reversing valve 9, the first hydraulic control check valve 10, the first boom hydraulic cylinder 11, the second boom hydraulic cylinder 12, the second hydraulic control check valve 13, the first Two electromagnetic reversing valves 14, the third electromagnetic reversing valve 15, hydraulic transformer speed sensor 16, hydraulic accumulator 17, second safety valve 18, controller 19, oil tank 20; the connection relationship of each element is:

[0031] The power sour...

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 provides a hydraulic excavator movable arm loop based on a hydraulic transformer and a control method thereof, and belongs to the technical field of hydraulic excavators. The hydraulic excavator movable arm loop based on the hydraulic transformer is characterized in that a port A of the hydraulic transformer (6) is connected with a high voltage network (4), a first pilot operated check valve (10) is connected between a port B of the hydraulic transformer (6) and a first movable arm hydraulic cylinder (11), another first pilot operated check valve (10) is connected between the port B of the hydraulic transformer (6) and a second movable arm hydraulic cylinder (12), a second pilot operated check valve (13) is connected between the port A of the hydraulic transformer (6) and the first movable arm hydraulic cylinder (11), a third magnetic exchange valve (15) is connected between the port A of the hydraulic transformer (6) and the second movable arm hydraulic cylinder (12), and a first safety valve (7) is connected between the port B of the hydraulic transformer (6) and the first pilot operated check valve (10). A hydraulic transformer control assembly (5) is controlled by a controller (19) according to an operating handle control signal (S), a hydraulic transformer thrust plate intersection angle signal and a hydraulic transformer rotating speed signal to enable the movable arm to stably operate at an expected speed. The hydraulic excavator movable arm loop based on the hydraulic transformer and the control method have the advantages of being easy to operate, high in control precision, work efficiency and energy recovery efficiency, low in cost and free of throttling loss.

Description

technical field [0001] The invention belongs to the technical field of hydraulic excavators, and in particular relates to a hydraulic transformer-based hydraulic excavator arm circuit and a control method thereof. Background technique [0002] In recent years, with the increasingly serious problems of resource shortage and environmental pollution worldwide, research on energy saving and emission reduction of hydraulic excavators has become an important direction for the development of the excavator industry. During the working process of the hydraulic excavator, the boom needs to be lifted and lowered frequently. Traditional hydraulic excavators control the movement speed of the boom by changing the valve port area of ​​the multi-way valve, so there will be a lot of throttling loss. And because there is a lot of gravitational potential energy in the lowering process of the boom, most of the gravitational potential energy is consumed on the valve port of the multi-way valve ...

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 Patents(China)
IPC IPC(8): E02F9/20E02F9/22F15B1/02F15B21/14F15B20/00
Inventor 刘志奇刘建仉志强
Owner 山西氢电科技有限公司
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