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CSME 2020/10
Volume 41 No.5
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595-604
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Mechanical-Electric-Hydraulic Coupling Dynamics of Hydraulic Drilling Rig
Guangzhu Chena, Chenglin Jianga, Changwei Miaoa, Lin Fua and Liangzhao Qia
aCollege of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610065, P.R.China.
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Abstract:
The coupling relationship of the hydraulic drilling rig, as a complex mechanical system with mechanical-electric-hydraulic, is very important to its working performance. The internal leakage of the hydraulic motor (a direct drive component of the drilling rig) is easy to appear and difficult to be directly observed, so it is especially important to analyze the working performance of the drilling rig under the internal leakage condition of the hydraulic motor. This paper focuses on the analysis of mechanical-electric-hydraulic dynamics of hydraulic drilling rig under no loading and loading. Firstly, a coupling dynamics model of the drilling rig is established theoretically and then the dynamic response of the drilling rig is analyzed by simulation. Secondly, the leakage sensitivity simulation and analysis of hydraulic motor is performed to explore the impact of the internal leakage of the hydraulic motor on the dynamic response of the drilling rig. Finally, a dynamic response test platform of the drilling rig is built, the experiment result agrees better with the simulation result under different leakage ratios of the hydraulic motor, and the leakage ratio of the hydraulic motor is sensitive to the rotational speed and load torque of the drilling rig.
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Keywords: hydraulic drilling rig, mechanical-electrical-hydraulic coupling, dynamics analysis, hydraulic motor leakage, sensitivity analysis
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©
2020
CSME , ISSN 0257-9731
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