Shaft crack detection in a steam turbine: experimental evidences …
A preliminary visual inspection allowed detecting an evident circumferential crack on the bottom of the blade bucket of the first HP stage. The angular extension of the crack was 360° degrees. No further crack was detected at the other HP stages. In the end, the turbine shaft was cut to allow opening the crack.
The steam turbine shaft is exposed to complex thermo-mechanical loading conditions during the operating cycle of the turbine. An elastic-plastic structural Finite Element Analysis (FEA) ...
Share. The alignment of turbine-generator sets poses unique challenges that only the best laser shaft alignment systems can overcome. Not the least of these is the difficulty of turning the shafts ...
Transient Analysis of Thermal Bending and Vibration of Steam Turbine …
A scaled rotor-shaft was used to study thermal bending and vibrations caused by steam heat. The design of the shaft was based on an existing power station high-pressure turbine rotor.
Turbine. A steam turbine with the case opened. A turbine ( / ˈtɜːrbaɪn / or / ˈtɜːrbɪn /) (from the Greek τύρβη, tyrbē, or Latin turbo, meaning vortex) [1] [2] is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical power when ...
Turbine rotor shafts are commonly made of steel grades 25Cr1Mo1VA, 30CrNi3Mo1VA, 26CrNi3Mo2VA, 23CrMoNiWV88 and X750. Turbine shafts are mainly machined through turning and groove-cutting operations with some amounts of drilling. Large amounts of metal are removed and demanding grooves have to be cut. Somers manufacturer turbine …
Selection, Analysis and Preliminary Design of a Steam-Lubricated, Steam-Turbine, Shaft …
Steam turbine efficiency can be improved by large diameter, high speed stages, provided seal leakage and friction, and wheel windage losses can be contained. This paper describes analysis and design of a steam-lubricated seal applied to a single stage experimental turbine designed for improved efficiencies over conventional types.
STEAM TURBINE Page 2 environment. This is the case with all but the exhaust end of a condensing turbine. Because a vacuum exists in the exhaust casing of condensing turbines, steam would not naturally travel along the exhaust shaft end out to thedraw air
Intermittent Rub Caused by Carbonized Oil in a Steam Turbine
Abstract. Light rubs between shaft and stationary parts are one of the most common faults in rotating machines. Sometimes, deposits of carbonized oil may form in the area close to oil-film journal bearings, especially in steam turbines. These deposits may cause the blockage of the available radial clearance between shaft and oil deflectors.
Essentials of Steam Turbine Design and Analysis | AIChE
Effective design, analysis, and integration of steam turbines can help optimize steam supply reliability and overall energy efficiency across your plant.
Gas Turbine Parts: Fast Basic Guide about Components. Steam chest and the casing: This part is connected to the higher pressure steam supply line and the low-pressure steam exhaust line respectively. …
Figure 2 – Torsional vibration. This paper will discuss torsional vibration as it refers to large 2-pole and 4-pole steam turbine powertrains. Torsional vibration, like lateral vibration, can be detrimental to powertrain operation. Many customers and insurance companies have recently become increasingly aware of the importance of torsional ...
A steam turbine produces shaft power from an enthalpy drop of steam. A special feature of steam turbines is the ability for very high power, due to the large …
Steam turbines: operating conditions, components and material requirements …
2.2. High temperature cylinder components. Materials for application in HP and IP cylinders of fossil fuel fired steam turbines are required to operate in the creep regime. Integrity is, of course, also required at lower temperatures to deal with transient start-up and shut-down conditions.
A steam turbine rotor shaft comprising the main body of the rotor shaft made of a high Cr steel of martensite structure, and a journal having a plurality of built-up welding layers formed successively said main body, the outer surface portion of the journal being made of steel containing 0.5 to 3 wt % of Cr, and a method of producing same.
GOLTENS'' MACHINISTS RECTIFY THE DAMAGED SHAFT IN ONLY 4 DAYS. Goltens received an urgent call from a power plant in the city of Gorontalo in Sulawesi. The plant''s 10MW Shandong Jinan steam turbine suffered a bearing failure resulting in a damaged rotor shaft. The power plant is a vital source of power to the city and minimizing …
Steam Turbine Rotor Vibration Failures: Causes and Solutions
The rub can cause elastic deformation of the rotor at the point of impact and temporary rotor shaft bending. The shaft bending will usually cause increased vibration levels (Figure 1). 1. Blade ...
Turbine - Steam, Efficiency, Power: A steam turbine consists of a rotor resting on bearings and enclosed in a cylindrical casing. The rotor is turned by steam impinging against attached vanes or blades on which it exerts a force in the tangential direction. Thus a steam turbine could be viewed as a complex series of windmill-like arrangements, all …
The steam turbine is one of the energy converters which converts the pressure energy of steam into mechanical energy in the form of the rotation of the shaft. The modern steam …
Model the dynamics of speed governing system, steam turbine, and multimass shaft …
The Steam Turbine and Governor block implements a complete tandem-compound steam prime mover, including a speed governing system, a four-stage steam turbine, and a shaft with up to four masses. The speed governing system consists of a proportional regulator, a speed relay, and a servomotor controlling the gate opening.
PDF | This thesis analyzes vibration test signal of TUOKETUO Power Plant 600 MW steam turbine unit ... This impact can cause rotor axial displacement and high vibration at turbine shaft and ...
(PDF) THERMO-MECHANICAL FATIGUE ANALYSIS OF A STEAM TURBINE SHAFT …
vol. 202018 TMF analysis of a steam turbine shaft. (a) . The R3 domain and direction of the nodal path from which the results below have been extracted. (b) . Time and spatial distribution of ...
Steam turbines are considered critical auxiliaries for operation in industrial and manufacturing plants. They are primarily used as prime movers for mechanical devices such as pumps, compressors, fans and generators for specific work in the plant processes. The function of a steam turbine is to convert the energy in steam to mechanical energy …
Fatigue damage of steam turbine shaft at asynchronous …
This torque causes torsional vibrations and fatigue damage of turbine shafts of different intensity. Based on the 3D finite element model of turbine shaft of the steam turbine K-200-130 and the mechanical properties of rotor steel there was estimated the fatigue damage of the shaft at its torsional vibrations arising as a result of connection of turbine …
The steam energy spins the turbine blades. (5) The generator is attached to the steam turbine by a rotating shaft. As the steam turbine spins, the generator spins and creates electricity. (6) The steam that uses it''s energy to spin the turbine passes through
