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Clutch Company, Inc.

Starting System Upgrade for General ElectricFrame MS-6001 Gas Turbine GeneratorsStarting System Upgrade for General ElectricFrame MS-6001 Gas Turbine Generators

SSS Clutch Company, Inc. June 12, 2007New Castle, DelawareSSS Clutch Company, Inc. June 12, 2007New Castle, Delaware

2 sssgears.co.uksssclutch.com

SSS Clutch Company, Inc. & SSS Gears LimitedSSS Clutch Company, Inc. & SSS Gears Limited

SSS SSS -- The ProductThe Product• Fit and forget

• Highly engineered custom design product

• Unique - used in critical applications.

SSS SSS -- The CompaniesThe Companies• Engineering and Application based• Small => focused on solutions, quality &

minimum bureaucracy• Subcontract component manufacturing with

strong control – 100% Responsible• 100% Design 100% Assembly 100% Test.


1. Marine systems - main propulsion: Naval Vessels & Fast Ferries.

2. Process systems: Fans, Pumps, Compressors etc.

3. Power Generation systems: Gas & Steam Turbine Generators

4 Auxiliary systems: Starting and turning systems

1. Marine systems - main propulsion: Naval Vessels & Fast Ferries.

2. Process systems: Fans, Pumps, Compressors etc.

3. Power Generation systems: Gas & Steam Turbine Generators

4 Auxiliary systems: Starting and turning systems

SSS CLUTCHES SSS CLUTCHES -- MAIN APPLICATIONS:MAIN APPLICATIONS:


GE Frame MSGE Frame MS--6001 Gas Turbine Generator6001 Gas Turbine Generator


History History –– Change to SSS Size 64T Clutches Initiated by Gas Change to SSS Size 64T Clutches Initiated by Gas Turbine End UsersTurbine End Users

•Over 7500 Jaw Clutches installed on starting and turning gear drives on GE Turbines (Earl Beemis, GE, Schenectady circa 1990)

•1990 – Kansas Power & Light, Tecumseh purchased the first Two 64T’s for Frame 5’s

•1991 – Consolidated Edison purchased the First 2 of 48 64T’s for Frame 5’s in Narrows and Gowanus Power Stations, Brooklyn, NY.

•1993 - GE purchased the first 64T for a test cell in Greenville, SC assembly facility

•1993 – GE purchases the first two 64T’s for the Frame 6B for Atarot Power Station, Israel Electric Company.

•2007 – 158 clutches installed on Frame 6B’s610 clutches installed on Frame 5’s10 clutches installed on Frame 7B’s


GE Model AGE Model A--500 Accessory Gearbox used on MS500 Accessory Gearbox used on MS--6001 Gas 6001 Gas Turbine with Starting Jaw Clutch on Input of Number 1 ShaftTurbine with Starting Jaw Clutch on Input of Number 1 Shaft


Detail of Jaw Clutch with Two Horizontally Positioned Detail of Jaw Clutch with Two Horizontally Positioned Air Cylinders for Engagement and DisengagementAir Cylinders for Engagement and Disengagement

Engaged Position Disengaged Position


Jaw Clutches Jaw Clutches –– Potential ProblemsPotential Problems

•Jaw Clutch May not slide on the torque

converter shaft splines due to wear, dirt, rust,

etc.

•Jaw Clutch does not engage properly due to wear or only partially

engages teeth and subsequently is

damaged on start.


Jaw Clutches Jaw Clutches -- Potential ProblemsPotential Problems

• Limit switch is grounded, open, or has

moved out of position due to vibration or clutch

hang-up preventing Gas Turbine start.

• Jaw clutch does not engage because the

actuation pistons are leaking (not holding) or have sheared off

due to misalignment.


Approximate Deceleration Time for Frame 6001 Gas TurbineApproximate Deceleration Time for Frame 6001 Gas TurbineGenerator and Speed where ReGenerator and Speed where Re--Start can be InitiatedStart can be Initiated

• Jaw clutch does not disengage and start must

be aborted.

• If gas turbine start-up is aborted (loss of flame, vibration trip,

high exhaust temperature, etc.), unit can not be re-started with jaw

clutch until the gas turbine rotor comes to

zero rpm.•Turbine Windmilling

and can not re-start


Page 24 of GE Paper on Improvements for the MS 5001 Gas Turbine Page 24 of GE Paper on Improvements for the MS 5001 Gas Turbine --Retrofit of SSS Clutch for GE Starters Retrofit of SSS Clutch for GE Starters -- Frame 3, 5, 6, or 7BFrame 3, 5, 6, or 7B

GE Standard New and RetrofitGE Standard New and Retrofit


Benefits of Installing a Size 64T SSS Clutch Benefits of Installing a Size 64T SSS Clutch -- the Following the Following Items can be Eliminated:Items can be Eliminated:

• The jaw clutch and its associated guard.

• Actuating cylinders used to engage the jaw clutch.

• The two-position, four-way valve used for cylinder actuation.

• Switches to prevent diesel start unless the jaw clutch is engaged.

• Zero-speed sensor and interlock.

• Pneumatics or hydraulics from Starting System Skid (Com Ed).

Frame 5 Jaw Clutch at NRG, Arthur Kill Station, Staten Island, NY


Benefits of Installing Size 64T SSS (Synchronous SelfBenefits of Installing Size 64T SSS (Synchronous Self--shifting) Clutch in Starting Drive of MSshifting) Clutch in Starting Drive of MS--6001:6001:

• Improvement in gas turbine generator starting reliability

• Reduced annual preventative maintenance efforts and cost.

• Reduction in trouble-shooting and corrective action efforts.

• Capability to reduce time needed to respond to “quick start” in the event a first attempted start is aborted (Consolidated Edison, NY). Installation on GE Frame 5 at NRG,

Gowanus Station, Brooklyn, NY


Size 64T SSS Clutch Design FeaturesSize 64T SSS Clutch Design Features

• Clutch engaging teeth – large backlash to improve misalignment capability

•(Note: Good initial alignment and dowels still important for driving and driven machinery).

• Clutch casing - cast aluminum to reduce cost and reduce weight.

• Clutch designed for GE accessory gear shaft or torque converter output shaft with straight splines or keyway. (Frame 3, 5 or 6)

• Size 64T fits existing space between torque converter and accessory gear regardless of DSBE (1.312 inch or .533 inch are GE standards).

• Clutch output component has six equally spaced radial holes for machinery alignment check with depth micrometer.

• Machinery angular alignment can be measured between clutch casing and torque converter housing in four places.


Mark V & VI Control System (Programmable) AlterationsMark V & VI Control System (Programmable) Alterations

• Additional Speed Tronic control card to give signal when the GT is at or below 500 rpm.

• Modification to permissive circuit to allow a re-start at up to 500 rpm.

• Provision for automatic quick start mode to eliminate 3-minute warm-up cycle for the diesel (Con Ed).

• Circuit wiring for clutch start solenoid (CS Control Wire No. 20 in Mark I) is removed.

• Zero speed sensor (Control Wire 14-HR in Mark I) is eliminated.

• The clutch starting circuit (CS Control Wire No. 30 n Mark I) is reallocated for a limit switch for new 64T clutch to signal when clutch is engaged and disengaged. Signals so the diesel can be shut down.

Mark I Speed Tronic Control panel with 500 rpm manual re-start switch

at NRG, Gowanus Station, Brooklyn, NY


Most Common Configuration of Size 64T for MSMost Common Configuration of Size 64T for MS--6001 6001 Starting System (SSS Drawing SL 17737)Starting System (SSS Drawing SL 17737)


The SSS Clutch The SSS Clutch –– How Does It Work?How Does It Work?

Condition with output at high speed


Data Required to Determine Correct 64T ConfigurationData Required to Determine Correct 64T Configuration

1) Turbine Frame Size and Model

2) Driven Machine Generator Compressor Other: ____________

3) Type of Starting: Electric Motor Diesel Steam Turbine Expander Other: _______

4) Model of Torque Converter (if used): Allison Twin Disc VoithSerial No.

5) Direction of rotation of the clutch looking from the starting motor to thegas turbine: Clockwise Counter-Clockwise

6) Distance between torque converter and accessory gear shaft ends (or startingturbine and accessory gear): .533 inches 1.312 inches Other:

7) Is torque converter output shaft keyed or splined:a) Keyed: Diameter Key Size b) Splined: Diameter No. of Splines

8) Is accessory gear input shaft keyed or splined:a) Keyed: Diameter Key Size b) Splined: Diameter No. of Splines

9) Accessory Gear Model and Serial Number:


Interfaces, Installation Time, and Approximate CostInterfaces, Installation Time, and Approximate Cost

Starting System Interface Requirements for 64T SSS Clutch

• Oil Supply Line – 1/4” NPT Connection on SSS Casing (3/8” pipe)• Drain Line Connection – 1 ½” NPT Connection on SSS Casing• Electrical Connection – 12 or 24 VDC or 110 or 220 VAC for SSSProximity Switch

Installation Time and Approximate Cost

• Cost of System Retrofit – Approximately $20,000 for Hardware • Time to Retrofit 64T – About 5 days using two people (Clutch only isabout 2 days)


Steps to Install Steps to Install -- Size 64T SSS Starting Clutch for GE Frame Size 64T SSS Starting Clutch for GE Frame MSMS--6001 Gas Turbine Generator6001 Gas Turbine Generator

Torque converter output (left) shown with torque converter rolled into vertical position and jaw clutch removed.

Accessory Gearbox input (right) prior to removal of Adaptor Ring and Labyrinth Seal.


Installation of size 64T SSS Clutch in MSInstallation of size 64T SSS Clutch in MS--6001 Starting 6001 Starting SystemSystem

Installation of SSS Clutch Input Hub on Torque Converter Output Shaft - .002’ TIR.


Installation of size 64T SSS Clutch in MS 6001 Starting Installation of size 64T SSS Clutch in MS 6001 Starting SystemSystem

Installation of SSS Housing Adaptor to Accessory Gear - .002” TIR.

Labyrinth Seal Removed from Accessory Gear Shaft and Replaced

with SSS Housing Adaptor Plate



Accessory Gear shaft after installation of clutch output sleeve and housing adaptor

SSS Clutch Output Sleeve installed on Accessory Gear Shaft

– Maximum .002” TIR.



Input Assembly Installed and Lower Casing Installed



Size 64T SSS Starting Clutch half assemblies shown in final positioning in between motor (or diesel engine) driven torque converter and accessory gear

Connection of Rigid Half Coupling to Clutch Output Clutch Ring.



Maximum Variation of .004” in Six Places.



Axial Measurement of Sliding Component to SSS Housing Adaptor in Two Places. Difference should be 1/8” plus or minus 1/64”.



Install Lower Housing, Two Floating Oil Seals, & Proximity Switch (not shown).


Installation of size 64T SSS Clutch in MS 6001 Starting Installation of size 64T SSS Clutch in MS 6001 Starting System, Hastings, NESystem, Hastings, NE

Installation of Top Half of SSS Clutch Housing.

Oil Supply Line Connected to Top of Supply Line Connected to Top of Accessory Gear Adaptor Plate for Size 64T Accessory Gear Adaptor Plate for Size 64T

SSS Clutch Casing.SSS Clutch Casing.


Drain Pipe Connection from Bottom of Size 64T SSS Clutch Drain Pipe Connection from Bottom of Size 64T SSS Clutch to top of MSto top of MS--6001 Gas Turbine Accessory Base Oil Tank6001 Gas Turbine Accessory Base Oil Tank


Oil Supply Line Connection for Size 64T SSS Clutch, Oil Supply Line Connection for Size 64T SSS Clutch, Hastings, NEHastings, NE


Size 64T Retrofitted into MSSize 64T Retrofitted into MS--6001 Starting System at CFE, 6001 Starting System at CFE, Los Los CabosCabos, Mexico, Mexico


Size 64T SSS Clutch Orders for G.E. Frame 6 Gas Turbine StartingSize 64T SSS Clutch Orders for G.E. Frame 6 Gas Turbine Starting DrivesDrives






Companies Who have Installed or Retrofitted Size 64T SSS Companies Who have Installed or Retrofitted Size 64T SSS ClutchesClutches

• General Electric, Greenville, SC• General Electric CM & U, Atlanta, GA• General Electric, Belfort, France• Nuovo Pignone Corporation• Hitachi• Pond & Lucier• Rotating Parts & Maintenance (RPM)• Wood Group• Turbine Technology Services• Sermatech• Power Engineering Services and Solutions (PESS)• Mechanical Dynamics & Analysis (MDA)

Clutch Company, Inc.

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Date post:	01-Feb-2018
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