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Reliability of the main fan units in automatically controlled pit ventilation systems

  • Mechanization and Automation of Mining Operations
  • Published:
Soviet Mining Aims and scope

Conclusions

  1. 1.

    The most reliable modern main fans have a probability of trouble-free operation of Pf(720)=0.76.

  2. 2.

    Analysis of the reliability of MVF as systems with recovery shows that the trouble-freedom of the system with reserve (on the assumption that the switchover device is absolutely reliable) is very high [Pc (720)=0.995], despite the greater complexity of the controlled fans.

  3. 3.

    The switchover device has lower trouble-freedom, Py (720)=0.89. Consequently, we should first seek to improve the reliability of the switchover device.

  4. 4.

    The reliabities of fan plants can be raised by the use of controlled fans for reversing the air stream, which permits us to dispense with reversing valves with drives and their shutters, and consequently raises the reliability of the switchover device.

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Literature Cited

  1. G. A. Babak, “Development of pit fan plants for main ventilation,” Gornye Mashiny i Avtomatika, No. 10 (1967).

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  3. N. N. Petrov, “Automatic control and reversing of main mine ventilator plants by rotating the blades of the fan rotor while in motion,” Author's abstract of dissertation, Tomsk (1966).

  4. N. G. Plyushchov and B. Ya. Ékber, Technicoeconomic Assessment of the Reliability of Equipment [in Russian], Nedra, Moscow (1967).

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  5. Ya. B. Shor, “Statistical methods of analysis and control of quality and reliability,” Sovetskoe Radio, Moscow (1962).

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  6. A. A. Garkavi and V. B. Gogolevskii, “Determination of the mean time of trouble-free operation of duplicated systems with control apparatus and automatic switchover,” Avtomatike i Telemekhanika, No. 5. (1965).

  7. B. V. Gnedenko, Yu. K. Belyaev, and A. D. Solov'ev, Mathematical Methods in the Theory of Reliability [in Russian], Nauka, Moscow (1965).

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Authors
  1. N. N. Petrov
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  2. P. T. Ponomarev
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Additional information

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 56–61, March–April, 1970.

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Petrov, N.N., Ponomarev, P.T. Reliability of the main fan units in automatically controlled pit ventilation systems. Soviet Mining Science 6, 175–179 (1970). https://doi.org/10.1007/BF02502155

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  • DOI: https://doi.org/10.1007/BF02502155

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