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Claverham Limited

MECHANICAL ENGINEERING

TRAFALGAR CLASS PLATFORM INTEGRATION

CRITICAL DESIGN

REVIEW

Claverham Limited

ACTUATOR UNIT

RETRACTED

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

Claverham Limited

ACTUATOR UNIT

Claverham Limited

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

Claverham Limited

INSTALLATION

LOOKING AFT, PORT SIDE

PROPELLER SHAFT

FRAME DATUM 93


STRUCTURE

PNEUMATIC ACTUATOR

REPOSITIONED

ELAHCS

STBD WALKWAY


BLOCK

Claverham Limited

INSTALLATION

LOOKING AFT, PORT SIDE

PROPELLER SHAFT

FRAME

DATUM 93


STRUCTURE

PNEUMATIC ACTUATOR

REPOSITIONED

ELAHCS

STBD WALKWAY


BLOCK

PROPOSED LOCATION FOR

CONTROL DRIVE UNITS A & B.

(ALSO LOCAL CONTROL

MAINTENANCE PANEL)

Claverham Limited

‘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

Claverham Limited

MOTORS, COUPLING, BRAKE & CASINGS

Claverham Limited

MOTORS

MOTOR ‘A’ MOTOR ‘B’

BRAKE

COUPLING

Claverham Limited

MOTORS CASINGS

INNER MOTOR CASING

(MOTOR A) OUTER MOTOR CASING

(MOTOR B)

END CAP

DOUBLE SEAL AT INTERFACES

GEARBOX

Claverham Limited

MOTORS

MOTOR MODULE 1 MOTOR MODULE 2

PRESSURE END CAP

MOUNTING FLANGE INTERFACE

AND HARD CONNECTION

MOTOR COUPLING

ACTUATOR SHOWN INSTALLED

Claverham Limited

MOTORS

CABLE ROUTING

Claverham Limited

GEARBOX & CASING STRUCTURE

Claverham Limited

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)

Claverham Limited

BESPOKE GEAR BOX (6:1 NOMINAL)

GEAR BOX DESIGN

Claverham Limited


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

Claverham Limited


GEAR BOX DESIGN

MOTOR INPUT

LAYSHAFT

ROLLERSCREW OUTPUT

RADIAL SAVING = 39mm

Claverham Limited


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


OD: 229.520mm FACE:

50mm HELIX: 12.0°

TEETH: 30 MODULE:

4.0 OD: 130.913mm

FACE: 70mm HELIX:

12.5°


OD: 381.086mm FACE:

75mm HELIX: 12.5°

Claverham Limited

ROLLERSCREW & ROD SYSTEM.

ANTI-ROTATION

Claverham Limited

ROLLERSCREW & ROD SYSTEM WITH ANTI-ROTATION

ROLLERSCREW ROLLER NUT

ROD

DRIVE INTERFACE

WITH ROLLERSCREW

ANTI-ROTATION

KEYWAY ROD INTERFACE RING

ROLLERSCREW CASE SLIDE RINGS

Claverham Limited

ANTI-ROTATION KEY AND ROLLER NUT INTERFACE

ROLLER NUT

ANTI-ROTATION KEY

Claverham Limited

ROLLERSCREW & ROD SYSTEM

ROLLERSCREW ROLLER NUT

ROD

DRIVE INTERFACE

WITH ROLLERSCREW

ROD INTERFACE RING ROLLERSCREW CASE

EXTENDED (558mm)

RETRACTED

ROD RETRACTS OVER

ROLLERSCREW

Claverham Limited

ROTARY POSITION SENSORS

Claverham Limited

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

Claverham Limited

ROD, GLAND AND DRAIN

Claverham Limited

ROD GLAND & DRAIN

PROPOSED SEAL & BEARING

ARRANGEMENT

EXISTING SEAL & BEARING

ARRANGEMENT (HYDRAULIC)

Claverham Limited

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

Claverham Limited

PRESSURE TEST BOX

SEAL TEST BLOCK REPLACES CASSETTE RETAINING

RING

Claverham Limited

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

Claverham Limited

SUPPLIMENT TO MECHANICAL ENGINEERING

DRAWING PACK

Claverham Limited

GEAR BOX SPACE ENVELOPE & INTERFACES

Claverham Limited

OUTER MOTOR CASING

Claverham Limited

INNER MOTOR CASING

Claverham Limited

MOTOR END CAP

Claverham Limited

ROLLER SCREW BODY – SHEET 1

Claverham Limited


Claverham Limited

GLAND

Claverham Limited

GLAND CASSETTE COMPONENTS

Claverham Limited

ROLLERSCREW SYSTEM ENVELOPE & INTERFACES

Claverham Limited

MOTORS, COUPLING, BRAKE ENVELOPE & INTERFACES

Claverham Limited

ASSEMBLY

mechanical cdr presentation ih - compressed

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