Hydraulic loading system used for high-precision force output and control method of hydraulic loading system
A technology of hydraulic loading and control method, which is applied in the directions of fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., can solve the problems of insufficient loading accuracy, the inability of hydraulic systems to achieve multi-level loading, and application limitations, etc. Achieve the effect of high output precision, improve control efficiency and control accuracy
Inactive Publication Date: 2020-02-07
JILIN ACAD OF AGRI MACHINERY
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Problems solved by technology
[0005] The existing hydraulic system cannot achieve multi-stage loading, and the loading accuracy is not enough, which limits the application
Method used
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[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0050] Such as Figure 1-2As shown, the present invention provides a hydraulic loading system for high-precision force output, including: a hydraulic station 100, an electromagnetic proportional reversing valve 200, a first electromagnetic valve 300, an output cylinder 400, a piezoelectric driver 500, and an output terminal 600 , the second electromagnetic valve 800, the third electromagnetic valve 700, the servo cylinder 910, the hydraulic cylinder 920 and the control module.
[0051] Among them, the control module is respectively connected with the hydraulic station 100, the electromagnetic proportional directional valve 200, the first electromagnetic valve 300, the output cylinder 400, the piezoelectric driver 500, the second electromagnetic valve 800, the third electromag...
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The invention discloses a hydraulic loading system used for high-precision force output. The hydraulic loading system comprises a hydraulic station, an electromagnetic proportional direction valve, afirst electromagnetic valve, an output oil cylinder, a piezoelectric actuator, an output end, a servo loading system, a second electromagnetic valve, a third electromagnetic valve and a control module. A liquid inlet of the electromagnetic proportional direction valve communicates with the hydraulic station. A liquid inlet of the first electromagnetic valve communicates with a liquid outlet of theelectromagnetic proportional direction valve. A rodless cavity of the output oil cylinder communicates with a liquid outlet of the first electromagnetic valve. One end of the piezoelectric actuator is connected with a piston rod of the output oil cylinder. The output end is connected with the other end of the piezoelectric actuator. A liquid inlet of the second electromagnetic valve communicateswith the servo loading system, and a liquid outlet of the second electromagnetic valve communicates with the liquid inlet of the first electromagnetic valve. A liquid inlet of the third electromagnetic valve communicates with the liquid outlet of the second electromagnetic valve, and a liquid outlet of the third electromagnetic valve communicates with a rod cavity of the output oil cylinder. By means of the system, multistage and multi-precision control over the output end can be achieved. The invention further provides a control method used for the hydraulic loading system for high-precisionforce output.
Description
technical field [0001] The invention relates to a hydraulic loading system for high-precision force output and a control method thereof, belonging to the field of hydraulic transmission. Background technique [0002] The control force precision of the electric servo cylinder is an order of magnitude higher than that of the electromagnetic proportional valve, and the control force precision of the piezoelectric driver is another order of magnitude higher than that of the electric servo cylinder. At the same time, the electric servo cylinder and the piezoelectric driver are used in series in a force output system, which can be applied and realized in a large range of displacement and multi-level precision of the output force and a wide range of force. [0003] The deformation of piezoelectric ceramics under the action of an electric field is very small, at most no more than one ten-millionth of its size. Don't underestimate this small change. The precise control mechanism made...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B11/16F15B13/06F15B21/08
CPCF15B11/16F15B13/06F15B21/087F15B2211/632F15B2211/78
Inventor 张云硕徐峰张含思郝宇佳李广宇张磊李玲玲孟长伊杨少奇于澎涛李剑飞
Owner JILIN ACAD OF AGRI MACHINERY