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List of KIMM TechnologiesVirtual Engineering Platform Research Division

Hydraulic Servo Actuator Using Hydraulic Dynamic Bearing for Turbine Control at Nuclear and Thermal Power Plants

Division Virtual Engineering Platform Research Division > Department of Reliability Assessment
Name Dr. Yongbum Lee
Department Department of Reliability Assessment
Tel +82 - 42 - 868 - 7151
E-mail lyb662@kimm.re.kr
Attachment Download 148_Hydraulic_Servo_Actuator_Using_Hydraulic_Dynamic_Bearing_for_Turbine_Control_at_Nuclear_and_Thermal_Power_Plants.pdf (1.7 KB)

Realizing high performance and extended life by adopting a hydrodynamic bearing for the hydraulic servo actuator of the turbine control steam valve at nuclear and thermal power plants

 

Client / Market

  • Device manufacturer (foundry, fabless, assembly)/semiconductor

 

Necessity of this Technology

  • Aims to develop a leading product with “development of a high performance, high efficiency steam control hydraulic servo actuator” by including a hydrodynamic bearing that minimizes seal friction and a smart check valve in the hydraulic servo actuator used for steam control at a nuclear/thermal power plant
  • Existing technology is the technology from 30 to 40 years ago when plants were first introduced and lags behind. Plants demand technical supplementation.
  • A localization is needed as the entire amount depend on import
  • Includes a new technology that makes up for problems in existing technology
  • Secured the industrial property right for overseas expansion

 

Technical Differentiation

  • Possible to secure a new market)
  • Supplied consumables for periodic repair at local/overseas nuclear/thermal power plants and new plant constructions)
  • Effective supplementation of existing problems and application of new technology/ planning to apply for the output enhancement project at local obsolete generating units)
  • Effect of replacing imports (applying 20%): 1.6 billion won for 20 units at nuclear power plants, 1.6 billion won for 40 units at standard thermal power plants)
  • Contributed to performance and function enhancement/Realized low-friction by designing the piston ring, a metal seal, as a non-contact dynamic bearing)
  • Realized functional enhancement by designing a smart check valve that prevents the oil leak issue that frequently occurs through an orifice leading to a breakdown with the operating pressure/achieved high performance (responsiveness increased by over 150%) and high efficiency (friction force improved by over 500%)

 

Excellence of Technology

  • Modeling & Simulation of the Hydraulic Servo Actuator Cushion for Power Plant (The Journal of Korean Tribology Society)
  • Simulation and Modeling of Integrated System for Machinery, Fluid and Electricity (Machinery and Material)
  • Modeling and Simulation of the Air Vent Valve for the Hydraulic Servo Actuators of the Power Plants (The Korean Society of Mechanical Engineers Fall Symposium)
  • Award:
    - 2012 Ministry of Knowledge Economy Citation (Man of Merit in Industrial Technology Promotion)
    - 2013 Korea Research Council for Industrial Science and Technology Chairman’s Citation (Excellent Research & Contribution to Science and Technology Advancement)
  • Career of developer: Working as a research engineer specializing in the hydraulic field from July 1987 to present

 

 

CURRENT INTELLECTUAL PROPERTY RIGHT STATUS

PATENT
  • Hydraulic Apparatus for Sluice Gate Using Air Elimination Valve (KR120315)
  • Hydraulic Servo Actuator for Turbine Control Steam Valve of Nuclear and Thermal Power Plants using Hydrodynamic Bearing (KR0046770)
  • The Method and Equipment for Manufacturing of the Piston Rod and Piston Rod Hereof (KR0903156)
  • Piston Rod and the Method and Equipment for Manufacturing of the Piston Rod (KR0728878)
  • Cylinder Block with Hydrostatic Bearing of Hydraulic Piston Pump, Motor (KR0598767)
  • Turbine Valve Control Actuator Using Internal Check Valve for Nuclear and Fossil Power Plants (KR1166689)
  • A Cylinder Measurable the Position of Piston Rod (KR717338)
  • A Cylinder Measurable the Relative Distance of Piston Rod (KR777412)
  • A Cylinder Measurable the Absolute Distance of Piston Rod (KR777413)
  • Assembly Structure of Intensifier (KR1110812)
  • Intensifier Using Injection Structure for Precision Control (KR1109539)
  • Low Noise Hydraulic Power Unit (KR667212)
  • Method for Cladding Cylinder Barrel with Copper Alloy in Hydraulic Motor and Pump (KR431615)

 

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