“Life Extension of Legacy Gas Turbines for Naval Propulsion” - ASHRAE · 2015. 6. 9. ·...

“Life Extension of Legacy Gas Turbines for Naval Propulsion”

EEinS2015 - International Conference “ENVIRONMENT & ENERGY in SHIPS 2015”

Grahame Martin Global Business Manager

[email protected]

Company Credit: Liburdi Engineering Limited, Rejuvenation (FSR ®), Safe Life Approach

mailto:[email protected]:[email protected]

Introduction


• Independent, highly experienced UK based dedicated gas turbine specialist since 2000

• Credible alternative to OEM gas turbine support

• Large stock-holding of Tyne and Olympus spares

• In excess of 450 years combined RR specific experience

• State-of-the-art workshop and test-bed facilities

• All services fully quality-accredited to ISO & OHSAS Standards

Legacy Gas Turbine Support For The Coming Decade


Alba - LLTS engines / spares

21 Tyne’s - 30 Olympus

Supply chain, spares,

accessory overhaul

Competency of manpower

Life extension – coatings,

repair schemes

Maximum service

flexibility…….

Non Destructive testing


Rigorous

Inspection criteria

FPI and MPI

Eddy Current

X-Ray

Acoustic

Thermography

Component Repair


Dog ring, locating dog frettage

Mating receiver for turbine

entry duct

Typical rejection of parts

Components can re-worked

Component Repair


Weld recovery & heat treatment

Successful rebuild of close tolerance components

Components repaired for service life

Component Repair


Number 7 bearing housing salvaged

High Temp Labyrinth seal area Silver plated

Pressure tested for proven sealing capability

Component Repair


O/H combustion chamber

Hard facing replacement

Sealing ring location recovered

Interconnector frettage recovery

Component Repair


Component O/H for service life

Installation tolerances restored

Head of combustion chamber ruptured

Replacement head &

securing boss installed

Component Repair


Worn stator blades and location

Stator contacted spinning rotor

Damage sustained to

compressor rotor and beyond

Component Repair


Recovered stator location

Replacement O/H stator

Replacement O/H compressor

on dynamic balance

Component Repair


There are just some components we can’t recover !!

But we do have replacements in stock !!

Rejuvenation (FSR®)


Turbine blade life limits – extended by FSR®

Reformation of grain structure

Maintaining optimum grain size

Turbine blades can go through the FSR® up to 3 times

Rejuvenation (FSR®)


Sets of blades have achieved 3 additional

service intervals and accumulated over

100,000 operating hours

Re-Lifing Of Critical Components


Assess turbine discs

for: High stresses,

rotating centrifugal,

local stress

concentrations

Creep, grain

boundary wedge

cracks

Corrosion or hot

erosion

Re-Lifing Of Critical Components


“Safe Life” Approach

Design component

stresses

Design operating

temperature envelope

Expected material

responses

Safety factors

Calculated minimum

creep / fatigue crack

initiation point (“LIFE”)

Marine Coatings


IP Coat Seal Coat

K900 top coat, added protection

IGV’s coated in K900

Air Intake Casing in stove enamel

LP comp cases in stove enamel

Discs and spacers in Sermetel

Marine Coatings


Turbine Discs and shafts in Sermetel

NGV’s and blades in IP 1041

Discs & Shafts FPI’d and MPI’d

Thermal Barrie Coatings (TBC)


Can be applied to a number of combustion

and hot gas path components

Component surface temperature reduction

Reduces effects from hot erosion

Extends component life

Technology Innovation


Olympus Air start / Inner starter drive Controlled air start in non critical situations

Feature selectable

Providing life extension to internal deep strip components


• Gas Turbine Air Starter & Starter gearbox

• Hi Temp / Hi Pressure Air regulator

• Position feedback to controller

MicroLogix controller • Demand control for air regulating

valve • Digital & Analogue inputs /

outputs • Speed referencing • Variable ramp rate application

Ships Bridge Local control panel Switchable selection Normal or fast operation

Air supply

Start air supply


“Life Extension of Legacy Gas Turbines for Naval Propulsion”

Grahame Martin [email protected]

mailto:[email protected]

“Life Extension of Legacy Gas Turbines for Naval Propulsion”IntroductionLegacy Gas Turbine Support For The Coming DecadeNon Destructive testingComponent RepairComponent RepairComponent RepairComponent RepairComponent RepairComponent RepairComponent RepairComponent RepairRejuvenation (FSR®)Rejuvenation (FSR®)Re-Lifing Of Critical ComponentsRe-Lifing Of Critical ComponentsMarine CoatingsMarine CoatingsThermal Barrie Coatings (TBC)Technology InnovationSlide Number 21Slide Number 22

“Life Extension of Legacy Gas Turbines for Naval Propulsion” - ASHRAE · 2015. 6. 9. ·...

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