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8/7/2019 Arani R&MBrochure
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RenovationModernisationEngineering ImprovementsRepairs Division
ARANI POWER SYSTEMS LTD.Engineering Improvements, Repairs & Spares DivisionArani Power Systems is an original equipment manufacturer of SteamTurbines and supplies Systems, Components and Services in the eldof steam based, medium capacity power generation equipments.The systems cover widely TG Island that includes Steam Turbines,Alternators, Gearboxes and Heat Exchanger, with the state of artcontrols and all electricals that cover up to switch yards.
The extensive knowledge and experience of our team of visionaryleaders and strategic thinkers drive us to many new and excitingdevelopments. Our distinctive blend of academic and technical
knowledge allows us to provide a wide range of solutions and ser-vices to power industry. Headquartered in Hyderabad, Arani Powerprovides cutting edge technology turbines and power solutions. Oursophisticated, high performance solutions together with our unparal-leled expertise, drives our clients to become value-based, perfor-mance-focused organizations. We have a good R&D team (whohave patents in turbo machinery area) working on the present rangeof products, as well as, on the new products and striving to bring outas many new features as possible to enhance the product efciencyand operational performance.
A well planned Refurbishment and Modernization activity enhancesefciency, increases capacity and improves reliability of a powerplant. Through Refurbishment and Modernization, a plant can boost
its efciency, reliability and extension of service life.
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Some of the major services offered are
Steam path upgrades
Efciency improvement in STG
Renovation & Modernization
On site and shop repair services
(i) Diaphragm Weld repairs
(ii)Rotor blade repairs.
STG Island and BOP Engineering services
Spares / Renovation and reverse engineering
of STs and GTs Spares
MHC to EHC Governing uprates
Generator rotor repair & rewinds
Generator Stator repair & rewinds
Relocation of STGs
Retrot & installation of Vibration monitoring
systems
Pumps & Compressors Spares and services
Overhaul & troubleshooting services
Modernization
Change of governing systems. Ex: mechanical /hydraulic to electronic systemsChange of electricalsChange of condensing systemUp-rating power capacityReplacements of high capacity turbines on theexisting foundationInstallation of Turbovisory EquipmentsInstallation of Monitoring Solutions
Engineering Improvements
Performance measurement & evaluation ofefciencies of the cycle as a whole orTurbine alone
a) Renovation
Improvements in efciency at componentlevel or at complete cycle level that includessteam ow path(Blading), heat exchangersand pumps by providing complete engineer-ing and design solutions - Better ow path canbe developed by CFD analysis
b) Life time extension:
RLA studies of rotors, casings and other criticalcomponents
Metallurgical and design improvementsReplacement of critical components
Before After Before After
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Repair & Replacement
Analysis of Chronic failures of blades by expertsthrough state of the art well established FE analy-sis and the design improvement of blades either inshape or size to mitigate stress related problems. Met-allurgical improvements also implemented
Eroded, corroded and pitted blades will be
replaced by reverse engineering by bringing inappropriate improvements in metallurgy based onmerits of the case
Rotor grooves and Blade roots are evaluated forstructural integrity and improved by FEA analysis
Rotor bends related repairs and balancing solutions
Chronic problems with respect to rotor bearingsystem dynamics are analyzed and appropriateenhancements in the rotors and bearings offered
Repair of rotor journals by study of complete rotor-bearing interactions
Supply ofNew rotors with improved or identical blad-
ing with better metallurgy .
a) Blades replacement:
b) Repair and replacement of bladed rotors:
Repair & supply of bearings
Analysing of Solving vibration problem and chronic
problems by providing expert services for diagnos-tics and analysis
Solutions for hunting problems
Replacement of existing sealing systems andproviding better engineering solution
Poor vacuum problems resolution
Repair / rewind of Generator rotor
Partial / full rewinds of Generatorstator
Supply of bearing / all deectorsseals etc.
Servicing & Spares
Over hauling
Trouble shooting of chronicproblems and resolution
Supply of spares for any makeST&G by reverse engineering
Major spares covered are blades,diaphragms, bearings, valve
cones, valve spindle, labyrinthseals, governing components,couplings etc.
Technical advisory services
Trouble shooting and resolution
Energy auditing
Improvements in operation &maintenance procedures
Improvements in start up systems
and procedures
c)
d)
e)
f)
g)
Generator Services
In partnership with our customers, Arani Power System mission is to deliver optimum Steam urbine based power solutionsand related Refurbishment and Modernization services with highest possible quality.Further, we are dedicated to beingtechnically superior, responsive, agile and customer focused while providing reliable, cost-effective solutions and qualityservices.
We will remain as a driving force in the development of innovative solutions, services and technologiesrelating to all aspects of Refurbishment and Modernization of existing units of all the makes and decentralized powersupply with Steam Turbines and related products.
We work with suppliers as partners and collaborate for better win-win situations.
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Causes of strength deterioration that lead to equipment failure
Reduced nozzle area
Eroded Diaphragm
Greater gaps in Packing
Defective dovetail on the LP Rotor
Damaged nal stage blade & erosion Shield
Defective Fork-Type dovetail pin
Damaged bellows on the crossover pipe
Eroded main stop valve stem
Eroded rst stage HP nozzle
Eroded rst stage of IP nozzle
Eroded rst stage of IP blade
Damaged Bolts
Defarmed Diaphragm
Bent Rotor
Damaged Blade
Fractured Control Valve Rod
Cracked Casing
Cracked Rotor
Damaged nozzle Box
Damaged Rotor
Damaged Casing
Damaged Bolt
Buildup of Scales
Wear
Corrosion
Wear
Creep
Fatigue
Brittleness
Contact:Arani Power Systems Ltd.
3rd Floor, Icon Block, Satyanarayana Enclave,Madina Guda, Hyderabad - 50. A.P. India.Tel: +91 40 23040851 / 52 / 53 / 54 / 55Fax: +91 40 23040856E-mail : services@aranipower.comWebsite: www.Aranipower.com
Quality Deteriorating due to Aging
Causes of efciency deterioration that leads to increased fuel consumption
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