Tritech Merlin Manual de usuario
Merlin
0711-SOM-00001, Issue: 03 1 © Tritech International Ltd.
Merlin
Product Manual
0711-SOM-00001, Issue: 03
Merlin
0711-SOM-00001, Issue: 03 2 © Tritech International Ltd.
© Tritech International Ltd
The copyright in this document is the property of Tritech International Ltd. The document is supplied by Tritech International Ltd on
the understanding that it may not be copied, used, or disclosed to others except as authorised in writing by Tritech International Ltd.
Tritech International Ltd reserves the right to change, modify and update designs and specifications as part of their ongoing
product development programme.
All product names are trademarks of their respective companies.
Merlin
0711-SOM-00001, Issue: 03 3 © Tritech International Ltd.
Table of Contents
Help & Support ........................................................................................................... 4
Warning Symbols ........................................................................................................ 5
1. Introduction ............................................................................................................. 6
2. Specification ........................................................................................................... 7
3. Installation .............................................................................................................. 8
3.1. Mechanical ................................................................................................... 8
3.2. Water Hoses ................................................................................................ 8
3.3. Hydraulics .................................................................................................... 9
3.4. Retro Flush Valve and Jet Bypass Valve ..................................................... 11
3.5. Seal Compensator ...................................................................................... 12
4. Principles of Operation .......................................................................................... 13
4.1. Suction Operation ....................................................................................... 13
4.2. Jetting Operation ........................................................................................ 13
5. Maintenance ......................................................................................................... 14
5.1. Tools Required ........................................................................................... 14
5.2. Basic Procedures ....................................................................................... 14
5.3. Fitting Spacer to Retro Valve Actuator ......................................................... 15
6. Troubleshooting .................................................................................................... 21
A. Motor Protector Assembly Procedure ..................................................................... 22
B. Merlin Assembly ................................................................................................... 24
C. Merlin Actuator Spacer ......................................................................................... 32
Merlin
0711-SOM-00001, Issue: 03 4 © Tritech International Ltd.
Help & Support
First please read this manual thoroughly (particularly the Troubleshooting section, if present).
If a warranty is applicable, further details can be found in the Warranty Statement, 0080-
STF-00139, available upon request.
Tritech International Ltd can be contacted as follows:
Mail Tritech International Ltd
Peregrine Road
Westhill Business Park
Westhill, Aberdeenshire
AB32 6JL, UK
Telephone ++44(0)1224 744 111
Email [email protected]
Website www.moog.com/tritech
Prior to contacting Tritech International Ltd please ensure that the following is available:
1. The Serial Numbers of the product and any Tritech International Ltd equipment connected
directly or indirectly to it
2. Software or firmware revision numbers
3. A clear fault description
4. Details of any remedial action implemented
Contamination
If the product has been used in a contaminated or hazardous environment you
must de-contaminate the product and report any hazards prior to returning the
unit for repair. Under no circumstances should a product be returned that is
contaminated with radioactive material.
The name of the organisation which purchased the system is held on record at Tritech
International Ltd and details of new software or hardware packages will be announced at
regular intervals. This manual may not detail every aspect of operation and for the latest
revision of the manual please refer to www.moog.com/tritech
Tritech International Ltd can only undertake to provide software support of systems loaded
with the software in accordance with the instructions given in this manual. It is the customer's
responsibility to ensure the compatibility of any other package they choose to use.
Merlin
0711-SOM-00001, Issue: 03 5 © Tritech International Ltd.
Warning Symbols
Throughout this manual the following symbols may be used where applicable to denote any
particular hazards or areas which should be given special attention:
Note
This symbol highlights anything which would be of particular interest to the reader
or provides extra information outside of the current topic.
Important
When this is shown there is potential to cause harm to the device due to
static discharge. The components should not be handled without appropriate
protection to prevent such a discharge occurring.
Caution
This highlights areas where extra care is needed to ensure that certain delicate
components are not damaged.
Warning
DANGER OF INJURY TO SELF OR OTHERS
Where this symbol is present there is a serious risk of injury or loss of life. Care
should be taken to follow the instructions correctly and also conduct a separate
Risk Assessment prior to commencing work.
Merlin
0711-SOM-00001, Issue: 03 6 © Tritech International Ltd.
1. Introduction
The Merlin is an integrated eductor based excavation system which is designed to pump
mud, sand, gravel, drill cuttings or shale without risk of blockage.
A heavy-duty cylinder operates a valve to reverse the flow at the nozzle to eject any object
which may be causing an obstruction. A second cylinder operates a bypass valve to provide a
powerful direct jet to break up heavy and cohesive seabed mud and sand prior to excavation.
The pump may be configured to an intermediate position allowing combined use of suction
and jettings. Both the impeller and eductor have been optimised for use on Work-class ROVs.
Merlin
0711-SOM-00001, Issue: 03 7 © Tritech International Ltd.
2. Specification
Not to scale, dimensions in mm.
Warning
Never use the same size fitting for pressure hoses and the case drain. If this is done there
is significant risk of incorrect hook-up which will lead to pressure being applied to the motor
casing and could result in an explosion and personal injury.
Hydraulic Motor Input
Pressure 170 to 250 Bar (2450 to 3600 psi)
Flow 65 to 110 litres/min (17 to 29 USgpm)
Hydraulic Fittings
Motor A & B No. 12 JIC male
Motor case drain No. 6 JIC male
Actuator Connection No. 4 JIC male
Actuator
Min. pressure 120 Bar (1740 psi)
Max. pressure 240 Bar (3480 psi)
Check Valve
Norm. Tritech Volvo Protector Assembly
Alt. Integrated Hydraulics FPR-1/22-0.5 (cracking
pressure 0.5 bar)
Output
Typical output jetting Up to 600 litres/min @ 8 Bar (160 USgpm @ 115 psi)
Typical output suction 2000 - 4000 litres/min (500 - 1000 USgpm)
Typical solids removal 10 - 40 tonnes/hour (350 - 1500 lb/min)
Nozzle Dimensions
Jetting 25.4mm (1")
Discharge 155mm (6")
Suction 104mm (4")
Clean water inlet 104mm (4")
Weight and Materials
Weight in air 40kg (90lb)
Weight in water 17kg (38lb)
Materials Stainless steel, Nylacast,
UHMWPE
Merlin
0711-SOM-00001, Issue: 03 8 © Tritech International Ltd.
3. Installation
Warning
Do not power the Merlin pump or hydraulic valve actuators until all hoses are
properly connected.
If powering or testing on deck it is important to ensure that all appropriate safety
measures are in place to prevent injury.
3.1. Mechanical
The pump may be mounted in any orientation on the vehicle. There are four mounting points
with 10mm clearance through holes
Not to scale, dimensions in mm.
the pump should not be mounted using the motor or hose nozzles as attachment points.
Case bolts should not be used.
3.2. Water Hoses
Hose Types
For correct hose sizes refer to Chapter 2, Specification.
The recommended hose type is: heavy duty nylon spiral reinforced.
This hose type is usually semi-transparent which assists visual inspection for damage and
blockages. Since it is all plastic it is light in water.
Both suction and discharge hoses should have a smooth internal bore with spiral
reinforcement.
Layflat style hoses are not recommended for discharge.
Installation Merlin
0711-SOM-00001, Issue: 03 9 © Tritech International Ltd.
Fittings
Use standard heavy-duty worm drive clips. Use of heavy-duty two bolt clamps will result in
damage to the hose connections on the pump unit.
Clean Suction Intake Screen
It is recommended that a Tritech International Ltd supplied suction strainer is used with the
pump. If using another strainer it must meet the following specifications:
• Maximum hole size: square mesh of 4mm aperture or circular perforations of 6mm
diameter.
• Minimum total free flow area: 0.025m²
The pump should not be operated in any circumstances without a suction screen.
Dredge Suction Nozzle
Suction nozzles should be designed with a nozzle cross-section area of approximately
80000mm²
Smaller nozzles may be used but material removal rates will be reduced. Larger nozzles are
of no benefit and will reduce performance.
A nozzle guard should be fitted that will pass a maximum of a 60mm diameter sphere or
50mm sided cube. The pump can pass single objects of a larger size, but if it takes in a
stream of objects then blockages can occur.
Jet Nozzle
The recommended sizes are 12 to 18mm diameter or an equivalent area.
The optimum size will need to be determined by trial because the water output from the power
pump will vary depending on the oil pressure and flow available from the ROV hydraulic
system.
3.3. Hydraulics
Oil
The pump should be operated using a premium grade mineral based hydraulic oil of ISO
VG 22 to 23
Filtration
The hydraulic system filtration must be to a minimum of 10μm absolute standard. A 10μm
nominal standard is regarded as inadequate.
Installation Merlin
0711-SOM-00001, Issue: 03 10 © Tritech International Ltd.
The recommended filtration is UN elements produced by Pall Industrial Hydraulics Ltd. or
equivalent products.
Hook-up
Figure 3.1. Hydraulic Hook-up Orientation
The pump is configured for correct rotation when the hydraulic supply is connected to the "A"
port of the Volvo motor and the return line to the "B" port.
Figure 3.2. Motor viewed when fitted to Merlin with hydraulic fittings downwards
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