Construction Machinery Load Sensitive-Independent Import and Export Hydraulic System and Its Control Method
A load-sensing and independent control technology, applied in mechanical equipment, fluid pressure actuators, servo motors, etc., can solve the problems of lack of solutions, difficulty in adapting to multi-actuator characteristic engineering machinery, etc., and achieve the goal of improving efficiency and controllability Effect
Active Publication Date: 2021-03-12
CHINA UNIV OF MINING & TECH
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there is currently a lack of solutions for the coordinated control of pump sources and independent control valves for inlet and outlet. Therefore, the current independent control of inlet and outlet is only suitable for single actuators, and it is difficult to adapt to construction machinery with multi-actuator characteristics.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] The present invention will be further explained below in conjunction with the accompanying drawings.
[0033] Such as figure 1 As shown, the construction machinery with three hydraulic actuators is taken as an example to illustrate the load-sensing-independent hydraulic system of construction machinery and its control method. Other construction machinery with more actuators can also adopt similar structures and controls. method.
[0034] The construction machinery load-sensing-independent hydraulic system for import and export of the present invention includes a load-sensing variable pump 1, a load-sensing multi-way valve 2, an independent control unit for import and export connected with a hydraulic actuator and a controller 5, wherein the load-sensing variable pump 1 The oil outlet of the load-sensing multi-way valve 2 is connected to the inlet of the load-sensing multi-way valve 2, and the outlet of the load-sensing multi-way valve 2 is connected to the independent ...
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
Login to View More Abstract
The invention relates to an engineering machine load sensitive-import and export independent control hydraulic system and a control method thereof. The system and the control method are applicable toan engineering machines with multiple hydraulic actuators. The hydraulic system includes multiple hydraulic actuators, a load-sensitive control unit, multiple import and export independent control units and a controller, wherein the import and export independent control units are connected between the load-sensitive control unit and the hydraulic actuators, each hydraulic actuator is equipped withone import and export independent control unit, and the connection manners are the same; and a loop is changed by the import and export independent control units, so that all actuators work in various working modes such as impedance extension, impedance retraction, high-pressure regeneration extension and low-pressure regeneration retraction, and composite actions of the multiple actuators are achieved. The system is simple in structure and easy to use and can be used for the engineering machine with the multiple actuators; a set of global energy-saving hydraulic system and control method canbe provided for the engineering machine from a pump source to the actuators; and the system and the control method are beneficial to improve the efficiency and maneuverability of the engineering machine hydraulic system.
Description
technical field [0001] The invention relates to an independent hydraulic system and a control method thereof, and is especially suitable for a construction machinery load-sensing-independent hydraulic system for import and export in the field of construction machinery hydraulic transmission and control and a control method thereof. Background technique [0002] The hydraulic system of construction machinery (such as hydraulic excavator) is a typical single-pump multi-actuator hydraulic system. The load of each actuator varies greatly, and the load varies between resistance load and overrunning load. More actuators, single-pump oil supply mode, and complex and changeable load conditions have caused great difficulties in further improving the control performance and energy-saving performance of construction machinery. [0003] The load-sensing control system is one of the most widely used hydraulic systems in construction machinery. It connects the pump source and the actuator...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/16F15B13/06
CPCF15B11/165F15B13/06F15B2211/88
Inventor 丁海港赵继云王伟平陈世其刘永状程刚
Owner CHINA UNIV OF MINING & TECH