Hydraulic control reversing valve, linkage control hydraulic system and excavator hydraulic control system
A hydraulic system and linkage control technology, which is applied in the field of hydraulic systems, can solve problems such as unsolved coordination problems between the no-load lowering of the boom and the linkage of the swing action, low load, and no swing action.
Active Publication Date: 2015-11-25
CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this linkage control system solves the linkage control of the lifting of the boom with full bucket and the slewing action, it fails to solve the coordination problem of the linkage between the unloaded lowering of the boom and the slewing action, that is, when the boom is lowered, the load is low and the slewing motion The time load is relatively high, if both of them act at the same time, there may be a problem of turning without action
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
[0062] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0063] like figure 2 As shown, the present invention firstly provides a hydraulic control reversing valve, the hydraulic control reversing valve includes a valve body 1 and a valve core 2, the valve core 2 is axially movable in the valve chamber 3 of the valve body 1, A first hydraulic control cavity 6 is formed between the first end of the valve core 2 and the first end of the valve cavity 3, and a second hydraulic control cavity 6 is formed between the second end of the valve core 2 and the second end of the valve cavity 3. Liquid control chamber 7. In addition, the hydraulically controlled reversing valve also includes a first plunger 8 and a second plunge...
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 discloses a pilot operated directional control valve, a coordinated control hydraulic system and a hydraulic control system of an excavator. Plungers (8 and 9) and control ports (A1 and A4) are arranged in pilot operated valves (6 and 7) of the pilot operated directional control valve, so that openness of an opening of the valve can be effectively adjusted by guiding control oil in from the control ports. The pilot operated directional control valve serves as a rotation operation valve in the coordinated control hydraulic system and the hydraulic control system of the excavator, and a pilot control oil way for controlling lifting of a movable arm in a movable arm operation valve is connected with the control ports of the pilot operation directional control valve, so that during movable arm lifting and rotation linkage, the openness of the opening of the rotation operation valve is relatively reduced, throttling is generated, oil source pressure is improved to push a movable arm cylinder to extend out, and low-load rotation and high-load movable arm cylinder linkage can be achieved. In addition, the problem of coordination of movable arm downward placing and rotation and linkage can be solved by setting a feedback oil supply way (FK) and a feedback reversing valve (15).
Description
technical field [0001] The invention belongs to the technical field of hydraulic systems of construction machinery, and in particular relates to a hydraulic control system of an excavator and a hydraulic control reversing valve and a linkage control hydraulic system applied therein. Background technique [0002] The linkage of multiple actuators is very common during the operation of hydraulic excavators, and the linkage of slewing and boom is one of them. For example, during trenching operations, the boom is lifted with a full bucket and rotated at the same time. After unloading, the boom is lowered without load and rotated. Generally, the pressure required for lifting the boom with full bucket is higher than the pressure required for turning, so when the two are linked together, there will be a situation where the turning moves but the boom does not move. On the other hand, the pressure for lowering the boom with no load is lower than the pressure required for slewing. Th...
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): F15B13/02
Inventor 陈志超潘文华
Owner CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC