Coal Engineering ›› 2020, Vol. 52 ›› Issue (1): 154-157.

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Optimum Design and Simulation on Overwinding Hydraulic Buffer System of Hoist

  

  • Received:2019-08-01 Revised:2019-09-23 Online:2020-01-10 Published:2020-05-13

Abstract: Aiming at the problem of pressure fluctuation caused when overwinding hydraulic cylinder absorbs the overwinding impact of hoist skip, the optimal design of overwinding hydraulic buffer system of hoist was carried out by adding throttle valve and connecting rod chamber and rodless chamber of overwinding hydraulic cylinder. The working principle of the optimized overwinding hydraulic buffer system of hoist was studied, and the simulation models of overwinding hydraulic buffer system were built based on AMESIM. The dynamic performance curves of pressure on rod chamber, skip displacement and skip speed of overwinding hydraulic cylinder before and after optimization were compared and analyzed. The influence of throttle valve diameter on overwinding hydraulic buffer system was simulated and studied. The research results show that the buffer performance of optimized overwinding hydraulic buffer system is improved, and the throttle valve can absorb the pressure fluctuation on rod chamber of overwinding hydraulic cylinder. The diameter of throttle valve has great influence on the piston reset of overwinding hydraulic cylinder. When the diameter valve is 9 mm, the buffer performance of overwinding hydraulic buffer system is better and the overwinding device has better dynamic characteristics.

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