Stability analysis of four-column hydraulic support

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (19) : 1-11.

HU Xiangpeng1,2, LIU Xinhua3

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Abstract

Effects of inertial force on stability of heavy machinery, such as, hydraulic support can’t be ignored. Here, based on D’Alembert’s principle, the stability mechanical model of a hydraulic support was established. The influence factors on the static stability and dynamic stability of the support were analyzed with numerical calculation, and the scheme to increase the support stability was deduced. The optimization scheme was verified with tests. The results showed that the top beam mass center position has the most obvious influence on the support stability, and the other factors are shield beam mass center position, front link one, rear link one and support height in turn; the closer to direction of top cover hinge joint the mass centers of top beam and shield, the more beneficial to the support stability, but the overall mass center position of the support should be taken into account; the support stability can be improved if front and rear columns rise and fall simultaneously and their accelerations match reasonably; the support stability can be improved by adopting the lagging support method to shorten top beam length, installing one-way lock and safety valve in column upper chamber and ensuring system steady pressure and liquid supply; this study can provide a theoretical guidance for optimization design of four-column hydraulic support.

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D’Alembert’s principle / four-column hydraulic support / stability / mass center / acceleration

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HU Xiangpeng, LIU Xinhua. Stability analysis of four-column hydraulic support[J]. Journal of Vibration and Shock, 2021, 40(19): 1-11

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