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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