Method for performing four-point lifting balance of hydraulic supports
A hydraulic support and balance technology, which is applied to mine roof support, earthwork drilling, fluid pressure actuating device, etc. Synchronization, etc.
Inactive Publication Date: 2021-03-19
LIAONING TECHNICAL UNIVERSITY +1
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[0002] At present, the hydraulic lifting system of the hydraulic support installation and disassembly machine is mainly composed of four main lifting hydraulic cylinders to complete the independent movement and stop of the four hooks. The control system of the existing hydraulic support installation and disassembly machine is mainly a four-cylinder independent control system. Due to manual The difference in control, the leakage of the hydraulic system, the non-linear frictional resistance between the moving elements, the uneven load of the hydraulic support and the influence of dynamic changes, etc., lead to the out-of-synchronization of the four hydraulic cylinders, which affects the smooth lifting of the installation and disassembly machine. run
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[0019] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. As a part of this specification, the principles of the present invention will be described through examples. Other aspects, features and advantages of the present invention will become clear through the detailed description. In the referenced drawings, the same reference numerals are used for the same or similar components in different drawings.
[0020] By analyzing the working state and motion characteristics of the hydraulic oil cylinder, the present invention proposes the design idea and research method of the hydraulic support installation and disassembly machine lifting synchronous control system based on electro-hydraulic proportional technology, and focuses on deriving electro-hydraulic proportional valves, asymmetric hydraulic cylinders and other components The mathematical model of the electro-hydraulic proportional synchronous c...
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The invention discloses a method for performing four-point lifting balance of hydraulic supports. The method comprises the following steps: flexibly controlling existing four hydraulic cylinders; ensuring that all moments of the four hydraulic cylinders during moving or stopping always keep same displacement amount, and continuously adjusting the opposite positions of the hydraulic cylinders in alifting or descending process; selecting a pilot type displacement-electricity feedback proportional direction throttling valve, and forming self-closed-ring control of input of an electro-hydraulic proportion throttling valve and displacement output of a main valve core through an induction type displacement sensor. Through the design of a lifting synchronous control system of a hydraulic supportmounting-dismounting machine based on the electro-hydraulic proportion technology, the method disclosed by the invention has the characteristics of being low in cost, high in synchronization accuracyand high adaptability of working environments, and lays a foundation for further design and test.
Description
technical field [0001] The invention belongs to the technical field of hydraulic support lifting devices, and in particular relates to a four-point lifting and balancing method for a hydraulic support. Background technique [0002] At present, the hydraulic lifting system of the hydraulic support installation and disassembly machine is mainly composed of four main lifting hydraulic cylinders to complete the independent movement and stop of the four hooks. The control system of the existing hydraulic support installation and disassembly machine is mainly a four-cylinder independent control system. Due to manual The difference in control, the leakage of the hydraulic system, the non-linear frictional resistance between moving elements, the uneven load of the hydraulic support and the influence of dynamic changes, etc., lead to the asynchrony of the four hydraulic cylinders, which affects the smooth lifting of the installation and disassembly machine. run. Contents of the inv...
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IPC IPC(8): F15B11/22F15B13/06F15B21/02E21D23/26
CPCF15B11/22F15B13/06F15B21/02E21D23/26
Inventor 丁飞李俊张利蓉赵心满
Owner LIAONING TECHNICAL UNIVERSITY