KEI Low Speed Turning Gear OptionMinimize Bucket Rock Wear

Koenig Engineering, Inc.

Located in Exton, PA U.S.A. - 1985

Designs and Supplies Gas Turbine Starting Systems and Automatic Turning Gear Drives for high-speed rotating equipment.

Over 1,800 Turning Gears (700+ 7FA Turning Gears) and 350 Gas Turbine Starting Systems installed around the World.

KEI 7FA Turning Gear History

17 inch

10 inch cost reduced Model

Introduction – Bucket Rock Wear

A.K.A. Blade Flop

During Turbine Operation, the rotor rotates at approximately 3600 RPM, centrifugally locking out the turbine blades.

Turbines on Turning Gear Reserve typically rotate at approximately 6 RPM.

Turbines on Lift Oil are capable of rotating significantly slower than 6 RPM.

Introduction – Bucket Rock Wear

From discussions with our End Users, Koenig Engineering identified a need and interest in reducing/eliminating Bucket Rock Wear, specifically for units on Lift Oil that spend a large amount of time on Spinning Reserve.

(Add Image of rotating rotor)

The KEI Low Speed Option reduces the Turbine Speed to 0.1 RPM, reducing opportunity for Bucket Rock Wear by a factor of 60.

Operation – KEI Low Speed TG Option

The KEI Turning Gear catches the decelerating driven shaft as it approaches 6 RPM and continues to rotate the system at 6 RPM to prevent rotor bow.

Once the turbine has reached an acceptable disc cavity temperature, the Low Speed Motor can be energized and the Primary Motor de-energized.

The driven shaft will then decelerate to approximately 0.1 RPM where it will remain until the primary motor is re-energized, accelerating the driven shaft back to 6 RPM.

The Turbine is now ready for standard operation.

Installation

Installed within a standard working shift, approximately 4 – 6 hrs depending on site-specific conditions.

Control System modifications will be written, uploaded, installed and tested by GE personnel.

Installation

Installed within a standard working shift, approximately 4 – 6 hrs depending on site-specific conditions.

Control System modifications will be written, uploaded, installed and tested by GE personnel.

Installation Kit

Installation Process

Remove Primary Motor (5HP), Sure Flex Hub and Motor Adaptor

Installation Process (Continued)

Remove primary housing cover

Remove bolt, slotted washer and lockwasher from primary gear, reserve for reuse.

Remove fan housing, brackets and bearing retainer from primary housing.

Installation (Continued)

Remove primary gear, worm and old race bearings

Installation (Continued)

Insert new bearing race and then spacer into primary housing, on the side where new fractional housing will be mounted.

Installation (Continued)

Mount fractional housing

Insert new worm into primary housing, with hex extension end protruding into new retrofit housing.

Installation (Continued)

Mount primary gear and tighten locking assembly

Insert bearing race into bore, and install shim pack and bearing retainer.

Installation (Continued)

Check gear to worm contact.

Add or remove shims to achieve ideal contact.

Installation (Continued)

Install new oil seals at 5 hp motor extension bearing retainer and re-install motor adaptor and primary motor.

Insert worm into the fractional housing. Mount extension end bearing retainer and tighten.

Installation (Continued)

Verify axial endplay.

Loosen extension end bearing retainer, to allow clearance for mounting the fractional gear/clutch assembly.

Installation (Continued)

Install fractional gear/clutch assembly and check contact.

Installation (Continued)

Place locknut on extension end of primary worm and use socket to tighten.

Installation (Continued)

Install fractional motor adaptor.

Install heated race bearing on worm gear shaft.

Installation (Continued)

Install fractional motor.

Installation (Continued)

Install fractional gear housing seals, retainer and cover plate.

Re-install primary housing cover plate.

Installation (Continued)

Completed Turning Gear with Low Speed Option

Operational Video

Insert Link to Video here also

http://www.youtube.com/watch?v=PKlioBQoSDM

Status

Conducted a successful installation and operation test with GE personnel present to observe.

Low Speed Option approved by GE’s CM&U Group.

Koenig Engineering has received significant interest in this option at the 2010 7F User Conference in Atlanta, GA.

Developing multiple proposals in conjunction with GE’s Sales and CM&U Group.

Contact InformationQuestions & Additional Information:

www.KoenigEngr.com

Pricing & Availability:Please contact your local GE Sales Representative