Hydraulic support platform stand column oil cylinder system controlled by proportional servo valve and pressure control method
A proportional servo valve, hydraulic support technology, applied in the direction of fluid pressure actuation system components, servo motors, servo meter circuits, etc., can solve problems such as unfavorable control performance, internal/external interference, etc.
Inactive Publication Date: 2018-12-18
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0006] The purpose of the present invention is to provide a proportional servo valve-controlled hydraulic support platform column oil cylinder system and pressure control method
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Embodiment 1
[0089] Example 1: figure 1 In the process of fully mechanized excavation of the roadway, when the advancing distance of the roadheader reaches the maximum empty head distance, the roadheader stops working, and the hydraulic support platform performs the boosting support process. Hydraulic support platform such as Figure 5 As shown, four independent proportional servo valves are used to control the pressure of four sets of column cylinders respectively, and the upper ends of the four sets of column cylinders are connected with longitudinal beams 11 and crossbeams 12; start the power supply, according to the initial support force required for the temporary support of the roof, after After the controller is adjusted, the column oil cylinder reaches the rated initial support force.
[0090] The invention drives the asynchronous motor to drive the quantitative pump to rotate and output high-pressure oil with a certain flow rate; through the filter, the reversing valve and the pro...
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The invention provides a hydraulic support platform stand column oil cylinder system controlled by a proportional servo valve and a pressure control method, and belongs to the technical field of valvecontrol hydraulic cylinder pressure control. An asynchronous motor is connected with a quantitative pump; a filter, the quantitative and the proportional servo valve are connected in sequence; the proportional servo valve is sequentially connected with a hydraulic lock and a stand column oil cylinder; the input end of the quantitative pump is separately connected with an oil tank through the filter, and the output end of the quantitative pump is connected with one port of the proportional servo valve; a proportional overflow valve is connected between a second port and a fourth port of the proportional servo valve; under the action of the quantitative pump, hydraulic oil outputs a certain flow of high pressure oil through the filter to control the stand column oil cylinder; the magnitude,adjusted by the proportional servo valve, of the flow of the hydraulic oil is changed, and the pressure of the stand column oil cylinder is controlled; and finally, low pressure oil of an oil outletof the stand column oil cylinder flows back into the oil tank under the guide of the proportional servo valve. The hydraulic support platform stand column oil cylinder system controlled by the proportional servo valve has the beneficial effects that the setting load of a roof of a temporary support of a fully-mechanized excavating roadway in a coal mine is precisely controlled, the negative influence of uncertain factors in the system on control performance is restrained, and the system has high robustness.
Description
technical field [0001] The invention relates to the technical field of valve-controlled hydraulic cylinder pressure control, in particular to a proportional servo valve-controlled hydraulic support platform column oil cylinder system and a pressure control method. Background technique [0002] During the comprehensive excavation process of coal mine roadway, the hydraulic support platform needs to implement fast and effective temporary support for the roof, so as to lay the foundation for the safe and reliable tunneling of coal mine roadway and provide protection for the life safety of front-line tunneling personnel in the coal mine. The pressure of the column cylinder of the hydraulic support platform directly affects the support ability of the hydraulic support for the advance support to the roof. Hydraulic support platform Column oil cylinder pressure is too low, it is easy to cause early separation of the roof, and even the roof collapse; too high column oil cylinder pre...
Claims
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Login to view more IPC IPC(8): F15B11/028F15B21/00E21D23/16
CPCE21D23/16F15B11/003F15B11/028F15B21/001F15B2211/505
Inventor 巩敦卫聂志郭一楠何勇张扬耿娜夏煌煌褚耀奇
Owner CHINA UNIV OF MINING & TECH
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