Load sensing hydraulic system for controlling six-way multiple unit valve

A load sensing and hydraulic system technology, applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, servo motor components, etc., can solve the complex structure of multi-way valves and load sensing pumps, and can not effectively eliminate bypass Throttling loss, lack of pressure adaptation control function and other problems, to achieve the effect of environmental protection, reduce work intensity and reduce power loss

Inactive Publication Date: 2003-03-26
ZHEJIANG UNIV
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the structure of multi-way valve and load sensing pump is complicated and the cost is high, which limits its popularization.
[0009] To sum up, in the existing energy-saving control methods of hydraulic systems, some have complex structures and high costs, such as load sensing control systems; some cannot effectively eliminate bypass throttling losses, such as constant power systems and flow demand Control system; although the negative flow control system can better eliminate the bypass oil return loss and can better control the working speed of the actuator, it lacks the pressure adaptation control function like the load sensing 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
  • Load sensing hydraulic system for controlling six-way multiple unit valve
  • Load sensing hydraulic system for controlling six-way multiple unit valve
  • Load sensing hydraulic system for controlling six-way multiple unit valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] exist figure 1 Among them, the output port of the hydraulic pump 1 is connected to the input of the load holding check valves 11 and 11A on the one hand, and is also connected to the O port of the first-stage multi-way valve. In this way, the hydraulic oil output by the hydraulic pump is divided into two parts, and one part enters the P port of the multi-way valve through the load holding check valves 11 and 11A. The A port and B port of the multi-way valve are respectively connected with the rodless cavity and the rod cavity of the hydraulic cylinder, and the T port is connected with the oil tank. According to the position of the valve core of the multi-way valve, the pressure oil at the P port is output from the A port or the B port, enters the hydraulic cylinder, and then drives the hydraulic cylinders 2 and 2A; The outlet flows back to the fuel tank. The Q port of the first-stage multi-way valve 3 is connected with the O port of the second-stage multi-way valve 3A...

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

A load sensing hydraulic system used in six-way valve. Using displacement-controllable variable delivery pump and six-way valve, multiple hydraulic load can be controlled. The loade limit can be checked by pressure detector set on the oil mouth of six way valve. On the bypass loop of six-way valve, a flow detector is set between the six-way valve group and the hydraulic oil tank to detect the oil flow of the rear oil-return tank. Because of the flow detector, the loss of flow through the bypass loop can be greatly lowered, also because of the check of load pressure in the system, the output pressure of hydraulic pump can be controlled.

Description

technical field [0001] The invention relates to the control of a hydraulic pump, a pumping device or a system, and is a load sensing hydraulic system used for the control of a six-way multi-way valve. Background technique [0002] In most hydraulically driven mechanical equipment such as hydraulic excavators and cranes, the hydraulic circuit includes at least one hydraulic pump and a multi-way valve. Among them, the hydraulic pump provides the pressure oil to drive the mechanical equipment, and the multi-way valve is located between the hydraulic pump and the actuator to control the flow and direction of the hydraulic oil, thereby controlling the movement direction and speed of the actuator. [0003] According to whether the displacement of the hydraulic pump used in the hydraulic system is variable, the hydraulic system of this "pump-valve-actuator" mode can be divided into a quantitative system and a variable system. Whether it is a quantitative ...

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): F15B13/043F15B13/06F15B21/08
Inventor 高峰冯培恩
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