Compound variable pump and compound hydraulic control system
A variable control and variable pump technology, applied in fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., to solve problems such as wasted energy and throttling loss
Active Publication Date: 2019-05-24
BEIJING KELU IND EQUIP
View PDF9 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In this case, the pressure compensation valve built in the load sensing valve and the flow control valve built in the load sensing pump constitute a double compensation, which leads to serious throttling loss, in other words, the pressure compensation valve becomes redundant and wastes energy. element
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
[0036] The present invention will be further described below in conjunction with accompanying drawing.
[0037] like figure 1 As shown, a compound variable pump includes a casing 9, and a pump body 1, a flow control valve 8, a switching valve 7, an electromagnetic proportional valve 6, a variable variable control cylinder 41, and a constant pressure control valve 10 are installed in the casing 9. and auxiliary reversing valve 16; the housing 9 is provided with the B port connected to the oil outlet of the pump body 1 through the oil circuit, the S port connected to the oil inlet of the pump body 1 through the oil circuit, and the S port connected to the oil inlet of the pump body 1 through the oil circuit. To the X port of the spring chamber of the flow control valve 8 and the L port for exporting the leaked oil, the oil that can be exported includes the leaked oil of the pump body 1, the leaked oil of the variable control cylinder 41, and the T port of the flow control valve ...
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 a compound variable pump and a compound hydraulic control system. According to the variable pump, one side of a piston rod of a variable control oil cylinder is connected witha swash plate of a pump body, and the other side of the piston rod of the variable control oil cylinder is connected with a valve sleeve of an electromagnetic proportional valve; a flow control valve, a switching valve, a port P of a constant pressure control valve and a rod cavity of the variable control oil cylinder are all connected with an oil outlet of the pump body; and a port A of the flowcontrol valve is connected with a port T of the switching valve, a port A of the switching valve is connected with a port P of the electromagnetic proportional valve, a port B of the switching valvecommunicates with a port A of the electromagnetic proportional valve and then is connected with a port P of an auxiliary reversing valve, a port A of the auxiliary reversing valve communicates with arodless cavity of the variable control oil cylinder, and a port A of the constant pressure control valve is connected with a port T of the auxiliary reversing valve. The compound hydraulic control system includes the variable pump and a plurality of execution units composed of execution elements and load-sensitive valves. The variable pump can be automatically switched to a volume and load-sensitive control mode, the compound hydraulic control system can make the multiple execution elements work without interference and efficiently, and the energy-saving effect is good.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a compound variable pump and a compound hydraulic control system. Background technique [0002] With the development of equipment manufacturing technology, the requirements for the hydraulic system are getting higher and higher in terms of weight reduction, energy utilization efficiency, and compound operation of multiple actuators. In the existing hydraulic system, the variable pump volume control system and the load sensitive throttling control system have been widely used due to their respective advantages. [0003] In a typical variable pump volume control system, the electric proportional displacement pump supplies the hydraulic oil in the oil tank to the hydraulic cylinder through the electromagnetic reversing valve. Among them, the electromagnetic reversing valve is controlled by the controller to switch. When the hydraulic cylinder does not need to act, the co...
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 IPC IPC(8): F15B11/08F15B13/02F15B21/08
Inventor 李建松余心明黎少辉孙金海许大华张文婷
Owner BEIJING KELU IND EQUIP