Design and Performance Analysis of New Type of Mine High Speed Rescue Pump

doi:10.3901/JME.2020.18.244

Abstract

Abstract: Nowadays, coal mine flooding accidents often happen. However, the existing rescue pump can't be quickly lowered into the well for drainage. To meet the requirement of rapid rescue, a new type of mine high speed rescue pump with small volume, large flow and high head is proposed. The whole structure is a combination of upper motor and lower pump. Besides, independent motor cooling and lubrication circuit, high speed thrust bearing and submersible sealing technology of wet stator are adopted in the unit. Under the same flow rate and head, the length and weight of the prototype are reduced by 31% and 51.2% compared with the pump in the current market. Taking the GFQ200-300 prototype as an example, the results of numerical simulation show that the maximum head is 304.56 m and the maximum efficiency is 64.32% at 6 000 r/min under different matching cases of the blade numbers of impeller and diffuser vane. From the experiment results, it is observed that the overall structure and hydraulic design of the prototype are reasonable and satisfactory; also, the accuracy of the numerical simulation calculation method is verified and the performance predicted used by SST k-ω model is the closest to the experiment data. Furthermore, the design scheme of the whole unit structure and hydraulic model could provide important theoretical guidance and technical reference for the subsequent design of big power and high speed pump units.

Key words: mine high speed rescue pump, hydraulic design, numerical simulation, experiment verification

CLC Number:

TH311

BAI Yuxing, KONG Fanyu, ZHAO Fei, XU Zhenfa. Design and Performance Analysis of New Type of Mine High Speed Rescue Pump[J]. Journal of Mechanical Engineering, 2020, 56(18): 244-253.

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