mechanical cdr presentation ih - compressed
TRANSCRIPT
Claverham Limited
MECHANICAL ENGINEERING
TRAFALGAR CLASS PLATFORM INTEGRATION
CRITICAL DESIGN
REVIEW
Claverham Limited
ACTUATOR UNIT – ASTUTE CONFIGURATION
REDESIGN AREAS TO ACCOMMODATE TRAFALGAR CLASS TEST PLATFORM
ROD END REDESIGN FOR CLAMP
COUPLING TO PNEUMATIC ACTUATOR
MOTOR CASINGS RECONFIGURED TO SUIT REDESIGN
OF GEARBOX
GEARBOX INTERNAL REDESIGN RESULTING IN
REDUCED SIZE OF CASING TO ALLOW
INSTALLTION INTO TRAFALGAR PLATFORM
ROLLERSCREW CASING TRUNNIONS REPLACED BY
FLANGES INTERSEAL DRAIN RECONFIGURED
ANTI-ROTATION FEATURE RECONFIGURED
INTERMEDIATE SECTION REMOVED
LVDT’s REMOVED FROM ROLLERSCREW. REVISED ROTARY
SENSORS INTRODUCED
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INSTALLATION
LOOKING FORWARD, PORT SIDE
PROPELLER SHAFT
FRAME DATUM 93
EXISTING ACTUATOR SUPPORT
STRUCTURE
PNEUMATIC ACTUATOR
REPOSITIONED
ELAHCS
STBD WALKWAY
PROPELLER SHAFT MAIN THRUST
BLOCK
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INSTALLATION
LOOKING AFT, PORT SIDE
PROPELLER SHAFT
FRAME DATUM 93
EXISTING ACTUATOR SUPPORT
STRUCTURE
PNEUMATIC ACTUATOR
REPOSITIONED
ELAHCS
STBD WALKWAY
PROPELLER SHAFT MAIN THRUST
BLOCK
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INSTALLATION
LOOKING AFT, PORT SIDE
PROPELLER SHAFT
FRAME
DATUM 93
EXISTING ACTUATOR SUPPORT
STRUCTURE
PNEUMATIC ACTUATOR
REPOSITIONED
ELAHCS
STBD WALKWAY
PROPELLER SHAFT MAIN THRUST
BLOCK
PROPOSED LOCATION FOR
CONTROL DRIVE UNITS A & B.
(ALSO LOCAL CONTROL
MAINTENANCE PANEL)
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‘ASTUTE’ vs ‘TRAFALGAR CLASS SUBMARINE – SPECIFICATION
PARAMETER FOR’D AFT RUDDER COMMON ACTUATOR
(TRAFALGAR)
NUMBER OF ACTUATORS 1 2 2 1
PEAK TORQUE (kNm) 300 160 600 270
RATE (º/s) QUIET/NORMAL 0.5/5.0 0.5/5.0 0.5/5.0 0.5/5.0
TORQUE ARM (mm) 600 600 765 609.5
SWEPT ARC (+/-º) 20 25 35 25
MECHANICAL STOPS (+/-º) 22 27 37 27
STROKE (mm) 460 555 921 558
ACCURACY (+/-º) 0.5 0.5 0.5 0.5
MAXIMUM LOAD (kN) 586 324 1054 590
MAXIMUM WAVE SLAP (kN) 2136 574 4602 574
FATIGUE FORCE (kN) 160 89 288 160
SHOCK (‘g’ for ½ Sin Pulse 78.5 Vertical, 66 Aft & 40 Athwartships
of 5ms)
VIBRATION NES 1004
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MOTORS CASINGS
INNER MOTOR CASING
(MOTOR A) OUTER MOTOR CASING
(MOTOR B)
END CAP
DOUBLE SEAL AT INTERFACES
GEARBOX
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MOTORS
MOTOR MODULE 1 MOTOR MODULE 2
PRESSURE END CAP
MOUNTING FLANGE INTERFACE
AND HARD CONNECTION
MOTOR COUPLING
ACTUATOR SHOWN INSTALLED
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GEARING - LINEAR ACTUATOR
UNIT GEAR RATIO EFFICIENCY
• ROLLER SCREW EQUIVALENT GEAR RATIO 251:1 0.85
(600mm TORQUE ARM)
• BESPOKE GEAR BOX 6:1 0.85
• SEPARATE THRUST BLOCK (TAPERED ROLLERS)
• OVERALL GEAR RATIO 1500:1 0.72 (ASSUME 0.7)
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BESPOKE GEAR BOX (6:1 NOMINAL)
GEAR BOX DESIGN
LAYSHAFT
37 TOOTH 12.0°
HELIX
73 TOOTH 12.0°
HELIX
30 TOOTH 12.5°
HELIX
91 TOOTH 12.5°
HELIX
MOTOR SHAFT
• CHOICE OF GEARING: HELICAL
1ST STAGE 12.0°
2ND STAGE 12.5°
• CONFIGURATION: TWO STAGE
• MAX INPUT TORQUE: 542.8Nm
• METRIC MODULE: 1ST STAGE 3mm
2ND STAGE 4mm
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BESPOKE GEAR BOX (6:1 NOMINAL)
GEAR BOX DESIGN
MOTOR INPUT
LAYSHAFT
ROLLERSCREW OUTPUT
RADIAL SAVING = 39mm
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BESPOKE GEAR BOX (6:1 NOMINAL)
GEAR BOX DESIGN
TEETH: 37 MODULE: 3.0
OD: 119.478mm FACE:
55mm HELIX: 12.0° MO
TO
R I
NP
UT
LA
YS
HA
FT
RO
LLE
RS
CR
EW
OU
TP
UT
TEETH: 73 MODULE: 3.0
OD: 229.520mm FACE:
50mm HELIX: 12.0°
TEETH: 30 MODULE:
4.0 OD: 130.913mm
FACE: 70mm HELIX:
12.5°
TEETH: 91 MODULE: 4.0
OD: 381.086mm FACE:
75mm HELIX: 12.5°
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ROLLERSCREW & ROD SYSTEM WITH ANTI-ROTATION
ROLLERSCREW ROLLER NUT
ROD
DRIVE INTERFACE
WITH ROLLERSCREW
ANTI-ROTATION
KEYWAY ROD INTERFACE RING
ROLLERSCREW CASE SLIDE RINGS
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ROLLERSCREW & ROD SYSTEM
ROLLERSCREW ROLLER NUT
ROD
DRIVE INTERFACE
WITH ROLLERSCREW
ROD INTERFACE RING ROLLERSCREW CASE
EXTENDED (558mm)
RETRACTED
ROD RETRACTS OVER
ROLLERSCREW
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POSITION
SENSORS
4 x ENCODERS
GEARBOX
GEARBOX OUTPUT
ANTI BACKLASH
GEARS
DRIVE GEAR
MOUNTED TO
ROLLERSCREW
ROLLERSCREW
LOCATION FOR
OPTICS INITIAL
THROUGH BORE
OPTICAL SET UP
ROTARY POSITION SENSORS
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ROD GLAND & DRAIN
PROPOSED SEAL & BEARING
ARRANGEMENT
EXISTING SEAL & BEARING
ARRANGEMENT (HYDRAULIC)
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ROD GLAND
GLAND ASSEMBLY SEAL CASSETTE
ORKOT PLAIN BEARINGS OR TURCON
GLYD-RINGS(ALSO ACTING AS CHOKE)
MAIN DYNAMIC SEALS H-ECOPUR MACHINED
POLYURETHANE ELASTOMER
ROD SCRAPER IN
HOUSING (ICE
SCRAPER)
RETAINING RING
RADIAL HOLES IN COMPONENT FOR INTER-SEAL DRAIN
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ACTUATOR UNIT ‘DUMMY LOAD’ WET SPACE ORIENTATION
SUPPORT SADDLE, BEARING & SHIP MONTING BASE
FRAME SITUATED BENEATH ACTUATOR AT C OF G
DRAIN NOW SITUATED AT BASE OF
ACTUATOR FOR WET SPACE OPERATION