드라이브 ㆍ 컨트롤 (Journal of Drive and Control)

  • 제15권2호
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  • Pages.32-37
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  • 2018
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  • 2671-7972(pISSN)
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  • 2671-7980(eISSN)
유공압건설기계학회 (The Korean Society for Fluid Power and Construction Equipment)
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발전소 스팀제어용 유압서보 액추에이터의 씰 수명 향상에 관한 연구

A Study on the Seal Life Improvement of the Hydraulic Servo Actuator for Steam Control of Power Plants

  • 투고 : 2018.03.08
  • 심사 : 2018.04.26
  • 발행 : 2018.06.01
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초록

The power plants use turbine output control devices to supply or shut off steam to high pressure and low-pressure steam turbines connected to generators. This turbine output control device is driven by a hydraulic servo actuator. The gas flows into the hydraulic servo actuator during periodic inspection or normal operation, and the resulting adiabatic compression of the gas raises the internal temperature of the actuator to $500^{\circ}C$. This temperature increase causes the seals to burn and show wear and tear, resulting in failure. In this study, an air vent valve was installed to allow gas inside the hydraulic servo actuator to flow large quantities of air at the beginning of the operation and after the periodic inspection. Gas was passed through for only minute flow during normal operation of the power plant. By applying the air vent valve, it improves the reliability of the hydraulic servo actuator by discharge the gas appropriately to improve the life of the seal.

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참고문헌

  1. Y. B. Lee and J. J. Lee, "A Study on the Air Vent Valve of the Hydraulic Servo Actuator for Steam Control of Power Plants," Trans. Korean Soc. Mech. Eng. B, Vol. 40, No. 6, pp. 397-402, 2016. https://doi.org/10.3795/KSME-B.2016.40.6.397
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  5. Y. B. Lee, "Performance characteristics analysis of the hydraulic system when hydraulic fluid contains a gas," Proceedings of the KSME Annual Meeting (fall), pp. 770-772, 2013.
  6. Y. B. Lee and Y. H. Yoon, "Modeling & Simulation of a Hydraulic Servo Actuator Cushion for Power Plants," J. Korean Soc. TriboL Lubr. Eng., Vol. 29, No. 1, pp. 7-12, 2013. https://doi.org/10.9725/kstle-2013.29.1.007
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