Steam Turbine

Features

• Front Standard can slide horizontally, so it maintains a clearance in the axial direction and even sealing in heat expansion. It includes Thrust and Journal bearings.
• Thrust Bearing incorporates a taper design. Thrust collars are modular with rotor.
• Journal Bearing is consisted of Tilting Pad or Elliptical Type with vibration and bearing metal temperature sensors.
• Single-casing HP/IP section forms a stage based on Impulse Design that can withstand more than 50% energy when compared to an Impulse Design. The turbines with HP and IP sections inside a single casing is 7 meters shorter than the turbines with a separate casing for HP and IP sections. So the Single-Casing HP-IP turbines can reduce the installation cost by 15~20% when compared to the Separated Casing HP/IP turbines, while having other features like 10% reduced maintenance cost and minimized heat stress at starting and loading.
• Turbine rotor is manufactured by forging a solid mono-block. Its integral wheel integrated with bucket dovetail, small rotor radius at high temperature area, and the wheel fillet speed up the starting and loading time by reducing the heat stress.
• Nozzle Box (at first stage) enables the partial-arc admission, while its multiple-shell structure is designed to ensure maximum heat efficiency.
• Nozzle Diaphragm is welded along the axial line, so that the gap between the stages is maintained accurately.
• Bucket is installed so that the dovetail on rotor is fixed in place. With highly effective form and corrosion coating, it's designed to efficiently accomplish the function during the lifespan.
• The casing, bucket and flow diffuser of Low Pressure Section are designed to have the optimal efficiency with three dimensional steam flow analysis and fluid dynamics.
• Last stage bucket is designed to have high corrosion resistance without the need for a separate resistance shield, by using three-dimensional dynamic analysis and reinforced materials.
• Labyrinth packing greatly improves the efficiency by sealing the gap between stages and axial ends.
• Single Crossover is designed to have very low-pressure drops. It's pressure-balanced expansion join is suitable for heat expansion and designed to minimize the stress on casing.
• Valves and hydraulic actuators: The independently powered control and stop valves enable for full or partial-arc operation. Also the design of reheat stop consisted of combined reheat valve with strainer, single casing and vertical stem allows for easy maintenance. The actuator controls the location of valves by using internal fluid.