Telescopic Alignment

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WELCOMEFAC CLASS ROOM

SHAFT ALIGNMENT PROCEDURE OF P44 SERIES FACS

PRESENTATION CONTENTS METHOD USED FOR ALIGMENT OF P44 SERIES FACS PRINCIPLE OF TELESCOPIC ALIGNMENT EQUIPMENT USED ACTIVITIES BEFORE ALIGNMENT ALIGNMENT PROCEDURE DIAMENSIONS/CLEARANCE LIMIT OF SHAFTING OF P44 SERIES CRAFTS PRECAUTIONS/IMPORTANT FACTORS TO BE CONSIDERED IN TELESCOPIC ALIGNMENT ENGINE TO GEAR BOX ALIGNMENT

METHOD USED FOR ALIGNMENT OF P44 SERIES FACS

DUE TO THE HIGH ACCURACY REQUIRED IN HIGH ROTATIONAL APPLICATIONS AND ONE REFERENCE POINT AVAILABLE IN P44 SERIES FACS IT IS MORE ADVISEBLE TO GO FOR TELESCOPIC ALIGNMENT

PRINCIPLE OF OPTICAL ALIGNMENTREFERENCE AXIS

EYE OR CAMERA

LIGHT REFERENCE ELEMENT ELEMENT WHICH ALIGNMENT TO BE DONE

JOINING OF TWO POINTS WILL MAKE A STRAIGHT LINE. IF SOME OTHER POINT ALSO IN THE SAME LINE, IT IS SAID THAT ALL THREE POINTS ARE IN LINED. SAME PRINCIPLE USED IN OPTICAL ALIGNMENT METHOD AND THIS TO BE APPLIED IN RADIALY AS WELL AS AXIALY. (PARALLEL AND ANGULAR)

SPECIAL EQUIPMENT USED IN TELESCOPIC ALIGNMENT MICRO TELESCOPIC ALIGNMENT CAMERA WITH MOUNTING BASE DEFERANT TYPES OF TARGETS WITH BEARING TARGETS STRUT TARGETS WITH OUT BEARING TARGETS STERN TUBE TARGETS GEAR BOX TARGETS

CHART TABLE LIGHT

ALUMINIUM TUBES JACK BOLTS (WITHOUT SHARP EDGES) LAMINATED SHIMS TWO NUMBERS HAND HELD COM SETS MICRO METER AND FEELER GAUGE ANTI-SIEZE COMPOUND OR ENDARU THEL FOR JACK BOLTS

BEARING PULLERS

ACTIVITIES BEFORE ALIGNMENT SLIPPING OF CRAFT WITH ZERO BED. TAKE DOWN REQUIRED READINGS SUCH AS RUDDER BUMPING CLEARANCE, CLEARANCE BETWEEN PROPELLER BOSS AND STRUT TUBE ROPE GUARD. REMOVE RUDDER AND PROPELLER. CUTTING OF ROPE GUARDS. TAKE DOWN BEARING CLEARANCES. TAKE DOWN RAKE ANGLE. REMOVE OF PROPELLER SHAFT. INSPECTION OF SHAFT BEARINGS. AS PER BEARING CONDITION AND CLEARANCE, REMOVE OF SHAFT BEARINGS. TAKE DOWN BEFORE ALIGNMENT READING.

AS PER THE BEFORE ALIGNMENT READING WE HAVE TO DESIDE THAT WETHER ALIGNMENT CORRECTION TO BE DONE OR NOT. IF BEARING CLEARANCES WITHIN LIMITS (PREVIOUS BEARING CALCULATION TO BE REFERRED) AND BEFORE ALIGNMENT READING ALSO WITHIN LIMIT (GEAR BOX 0.2MM AND STRUT 0.3MM) WE CAN LEAVE ALIGNMENT. IF BEARING CLEARANCE BEYOND LIMIT BUT BEFORE ALIGNMENT READING IS WITHIN LIMIT, WE HAVE TO INSTALLED NEW BEARINGS AND RE-CHECK ALIGNMENT.(MOST PROBABLY WE HAVE TO GO FOR ALIGNMENT CORRECTION). IF BEARING CLEARANCES WITHIN LIMIT BUT BEFORE ALIGNMENT READING BEYOND LIMIT, WE HAVE TO CARRY OUT ALIGNMENT CORRECTION.

TELESCOPIC ALIGNMENT PROCEDURE

STRUT

STERN TUBE

GEAR BOX CAMERA

SCHEMATIC DIAGRAM OF SHAFTING ARRANGEGEMENT P44 SERIES CRAFTS

PREPARATION OF SURROUNDINGSALIGNMENT PLACE SHOULD BE COVRED PROPERLY TO MINIMIZE EFFECTS OF WIND AND LIGHT MINIMIZE MOVEMENTS TO CRAFT SURROUNDING SHOULD BE CALM AND QUIT

COMFORTABLE CHAIR IS REQUIRED FOR PERSON WHO DONE THE ALIGNMENTALL REQUIRED TOOLS TO BE BROUGHT TO THE PLACE ATOMOSPHERIC TEMPERATURE SHOULD BE MINIMUM (SHOULD BE AT NIGHT TIME)

TELESCOPIC CAMERA INSTALLATION TRAVERSING SCREW OF CAMERA SHOULD BE IN MIDLE POSITION SAFETY LINE SHOULD BE CONNECTED TO CAMERA BRACKET FOR THE PREVENT ANY FALL DOWN OF CAMERA CAMERA HOLDING BEARING SHOULD BE TIGHTEN BY USING PROPER TOOL

INTALLATION OF GEAR BOX TARGETS TO THE GEAR BOX FLANGE PROPERLY WHITE PAPER SHOULD PASTE OF GEAR BOX FLANGE INSTALLATION OF CHART TABLE LIGHT INSTALLATION OF STERN TUBE TARGETS

IN THIS ALIGNMENT METHOD WE CONSIDER STERN TUBE TARGET AS THE REFERENCE TARGETZERO THE CAMERA WITH STERN TUBE TARGET THERE ARE FOUR ADUSTMENT SCREWS THAT WE CAN USE FOR THE TASK. 02 NOS ON CAMERA BRACKET AND OTHER 02 NOS ON MOUNTING BASE

INSTALLATION OF STRUT

INSERT OF STRUT WITH HELP OF THE 08 NOS CROSS BOLTS TIGHTEN TO TORQUE 16.5 KG/M

ALIGN THE STRUT BY ADJUSTING JACK BOLTS AND MEASURING DISTANCE BETWEEN STRUT HOUSING AND MOUNTING.INSERT SHIMS ACCORDING TO READING AND REMOVE JACK BOLTS TIGHTENING MOUNTING BOLTS INSERT WEDGES BETWEEN STRUT AND STRUT HOUSING

ALIGNMENT CORRECTION OF GEAR BOX GEAR BOX BED TO BE DP TESTED DO THE ALIGNMENT USING 08 NOS JACK BOLTS AND PULLER BOLTS MEASURE THE HIGHTS AND INSERT THE SHIMS ACCORDINGLY REMOVE JACK BOLTS AND TIGHTEN MOUNTING BOLTS 02 NOS LOCKING PLATES TO BE WELDED TO BOTH AFT MOUNTING SHOES TO STOP SLIDING MOVEMENTS TOWARDS AFT

INSERT SHAFT BEARINGS IF REQUIRED INSERT PROPELLER SHAFTS

SOAP SOLUTION TO BE USED WHEN RELEASED, SHAFT TO BE SLIDED DOWNWARDS

JOINING PROPELLER SHAFT TO GEAR BOX A CONE NUT WITH LOCKING PLATE AND SCREWS TO BE INSERT (CONE NUT TORQUE 150 KGM)

COUPLE GEAR BOX FLANGE WITH SHAFT FLANGE(18KGM)

INSTALATION OF PROPELLER INSERT CONE NUT WITH LOCKING ARRANGEMENT(135 KGM)

DIMENSIONS/CLEARANCE LIMITS OF SHAFTING OF P44 SERIES CRAFTSSHAFT DIAMETER 95.25 MM STRUT AND STERN TUBE INNER DIA 115 MM RUDDER BUMPING CLEARANCE 15 MM CLEARANCE BETWEEN ROPE GURD AND PROPELLER - 10 1MM

SHAFT BEARING CLEARANCE REFERED TO PREVIOUS BEARING CALCULATION SHEETALIGNMENT TOLERANCE GEAR BOX 0.2 MM STRUT 0.3 MM RAKE ANGLE - 120 ENGINE TO GEAR BOX ANGLE - =8.0 0.50, = 0.25

PRECAUTIONS/IMPORTANT FACTORS TO BE CONSIDERED IN TELESCOPIC ALIGNMENT PERSON WHO CARRY OUT ALIGNMENT SHOULD BE VERY EXPERIENCED, COULD BE ABLE TO WORK LONG DURATION WITHOUT GET TIRED. OTHER PERSONS IN HIS TEAM ALSO HAVE SAME CHARACTERISTICS. ONLY ONE PERSON SHOULD INVOLVE IN TAKING ALIGNMENT READING TO MINIMIZE HUMAN ERRORS. GREASE JACK OR SHIP BUILDERS PULLER TO BE USED FOR REMOVE OF PROPELLER.

SAME SIZE WOODEN SHAFT RESTING BLOCKS TO BE USED WHILE TRANSPORTATION OF PROPELLER SHAFT FROM SLIPWAY TO SME FACTORY AND VICE VERSA.

ALL JACK BOLTS SHOULD BE WITHOUT ANY SHARP EDGES EXCEPT END POINT . ALL JACK BOLTS SHOULD BE IMMERSED IN ENDARU THEL TO PREVENT ANY SEIZE DURING TIGHTENING. IF WE FABRICATE NEW MOUNTING BOLTS WE HAVE TO CARRY OUT SHAMPERING TO ELIMINATE SHARP EDGES. ALL JACK BOLTS TO BE CLEAN WITH KEROSINE AND KEEP IT IN LUBE OIL CONTAINER. DO NOT REAMER HOLES. WE HAVE TO FILLED BY WELDING AND GRIND TO LEVEL. BEST FITTER IN SME FACTORY TO BE UTILIZED FOR DRILLING OF MOUNTING SHOES. STRUT TO BE TESTED FOR BENDING AND TWISTING IN SME FACTORY AND CORRECTED BY HEATING.

STRUT HOUSING AND GEAR BOX BED TO BE DP TESTED BEFORE ALIGNMENT COMMENCED. ALLWAYS USE PROPER TOOL BOXES. OIC OF CRAFT SHOULD BE PRESENCE THROUGH OUT ALIGNMENT. ALL JACK BOLTS AND MOUNTING BOLTS TO BE NUMBERD FOR EASY COMMUNICATION BETWEEN PERSON WHO TAKE ALIGNMENT AND PERSONS WHO ARE INVOLVED IN TIGHTENING BOLTS.(A1,A2,B1,B2) ACTIONS TO BE INITIATED TO OBTAIN SPECIAL RATION FOR PERSONS INVOLVE IN ALIGNMENT.

RAKE ANGLE TO BE OBTAINED BY USING INCLINO METER AND IF THERE IS ANY ALTERATION, WE HAVE TO CUT ASTERN TUBE AND CORRECT THE RAKE ANGLE.

MOVEMENTS TO THE CRAFT AND MOVEMENTS INSIDE CRAFT SHOULD BE MINIMIZED. DO NOT TOUCH ALIGNMENT CAMERA OR BASE AFTER ZERO THE CAMERA WITH STERN TUBE TARGETS.

POINT TO POINT ALIGNMENT (ENGINE TO GEAR BOX)

=8.0 0.50

= 0.250

POINT TO POINT METHOD IS USED TO CARRY OUT ALIGNMENT BETWEEN GEAR BOX AND ENGINE. INSTALLATION OF 02 NOS FLANGES TO GEAR BOX AND ENGINE FLANGES WITH POINTERS PLACED CENTER SUCH A WAY THAT BOTH POINTERS FACED TO EACH OTHER SHIFT LOCATION OF ENGINE BY JACK BOLTS USING SAME METHOD AS FOLLOWED IN GEAR BOX ALIGNMENT SUCH A WAT THAT BOTH POINTERS MAKE PROPER CONTACT TAKE DOWN ANGLE READING BY USING BEVEL PROTECTER