TURBOCOAX ® High temperature Capacitive Sensors

Temperature measurement
hout
it
w
C
°
0
0
4
1
Up to
cooling system
TURBOCOAX
®
High temperature
Capacitive Sensors
Capacitance sensors
for non contact
measurement
Capacitive sensors were first developed to
measure the clearance between the tip of
the blades and the casing of turbo engines.
The turbo engine output is directly related to this
clearance which must be as small as possible, to
give maximum output efficiency, however in no
circumstances must the blades touch the engine
casing.
Most capacitive sensors applications have been
mainly used for measurement in aircraft engines
however the same types of measurement apply
to industrial gas turbines:
•
•
•
•
Compressor control
Turbine control
Development measurement
Engine monitoring
without
C
°
0
0
4
1
to
p
U
cooling system
Expertise
In partnership with the main international
turbine manufacturers, THERMOCOAX offers
capacitive sensors which can withstand very
high temperatures and are adapted to two different technologies:
• Triaxial up to 1100°C
• Pseudo-triaxial up to 1100°C and1400°C
To work with our customers requirements for
higher temperature ranges, THERMOCOAX
solutions were developed with:
• ceramic / metal brazing
• ceramic / platinum brazing
• special designs to avoid the
disintegration of the probe in the turbine
• triaxial mineral insulated cable with high
level of insulation and low level of
capacitance
THERMOCOAX
Rotating Blades
Engine Casing
Clearance
measurement
C
d
• Maximize the turbo
engine yield which is
directly related to this
clearance.
Clearance
Sensor
Electrode
Compressor blade tip clearance
C=
S
* S/d
Turbine blade tip
Rotating Blades
Tip timing
• Measurement of the
blade vibration
Engine Casing
C
Sensor
Electrode
Tip timing
Debris Monitoring
• The capacitance technology allows to monitor
the metallic particles ejected from the turbine in
the exhaust line
• Enables to manage the maintenance schedule
Efficient
maintenance
programme
Debris monitoring
Shaft displacement and
vibration measurement
• Typical measurements:
♦ Concentricity of the shaft
♦ Vibration of the exhaust wall
Shaft displacement and
vibration measurement
TURBOCOAX ® 1100 triaxial
•
•
•
•
•
•
Smaller the probe,
easier its integration
Temperature range: -55°C up to 1000°C nominal
Maximum temperature: 1100°C peak
Versions: triaxial or pseudo triaxial
Hermetic technology
Body: Inconel® alloy 600, thread or smooth
Triaxial cable:
Pseudo
triaxial
Sheath material: Inconel® alloy 600
♦ Insulation: highly compacted magnesia powder
♦ Outer diameter: 2.5 mm and more
• Pressure: 0.5 to 40 bars
• Vibrations: <150 G, 10 to 20 KHz
• Insulation resistance:
13
♦ 10
MΩ / 250 V at 20°C
♦ 10 MΩ / 250 V at 600°C
♦
Triaxial
Electrode
Overall
dimension
Ø 4 mm
Ø 6.28 mm
Ø 4.5 mm
Ø 6.33 mm
Ø 5 mm
Ø 9 mm
Ø 8 mm
Ø 14 mm
Ø 3 mm
Ø 8.2 mm
Ø 8 mm
Ø 20 mm
Ø 17 mm
Ø 22 mm
Clearance
range*
From
0 mm
up to
10 mm
From
0 mm
up to
20 mm
Mounting
Electrode: Kovard alloy
Body: Inconel® alloy 600
Mounting: thread or smooth
with flange for welding
*depending on the electronic system
TURBOCOAX ® 1400
pseudo triaxial
•
•
•
•
•
•
•
•
Temperature range: -55°C up to 1300°C nominal
Maximum temperature: 1400°C peak
Version: pseudo triaxial
Hermetic technology
Ceramic / Platinum brazing know-how
Body: Inconel® alloy 600, thread or smooth
Electrode: platinum
Triaxial cable:
♦ Sheath material: Inconel® alloy 600
♦ Insulation: highly compacted magnesia powder
♦ Outer diameter: 2.5 mm and more
• Pressure: 0.5 to 40 bars
• Vibrations: <150 G, 10 to 20 KHz
• Insulation resistance:
13
♦ 10
MΩ / 250 V at 20°C
Sensor
♦ 10 MΩ / 250 V at 600°C
Pseudo
triaxial
Clearance
range*
Mounting
Ø 4.25 mm
Ø 10 mm
Up to
4 mm
Smooth with flange to be
welded
Mineral Insulated Cable
L1
Mounting
L1
Swaged
part
Ø 2.5
Connedion to the
electronic system
LEMO, MICRODOT or
any other connector
Ø 2.5
Radial
Overall
dimension
*depending on the electronic system
Axial
types
Electrode
L2
L3
Ø3
Flexible cable
THERMOCOAX
Pseudo triaxial
Triaxial
Coaxial sensor
Triaxial sensor
Electrode
Electrode
THERMOCOAX
THERMOCOAX
triaxial MI cable
triaxal MI cable
Ground
Ground
Guard
Target
Guard
THERMOCOAX
Triaxial MI cable
Electrode
Electrode
Triaxial
Pseudo triaxial
Coaxial
Static measurement
Excellent
Good at short time
Bad
Dynamic measurement
Excellent
Excellent
Mean
Vibration rejection (cable)
Excellent
Excellent
Mean
Rejection of temperature
High
High
Mean
Cable length effect
Mean
Mean
High
Behaviour
MI Cables Insulation Resistance and
Capacitance versus temperature
Insulation Resistance (Ω.m)
Capitance (pF/m)
1,00E+13
800
1,00E+12
700
1,00E+11
600
1,00E+10
1,00E+09
500
1,00E+08
400
1,00E+07
300
1,00E+06
200
1,00E+05
1,00E+04
100
1,00E+03
0
0
200
400
600
Temperature °C
800
1000
RI MgO
C MgO
C SiO2
RI SiO2
Pseudo-triaxial design for debris
monitoring - ATEX certification
EExd for explosive area.
THERMOCOAX
Our Company
With almost 50 years experience in heating
solutions and temperature measurement,
THERMOCOAX has acquired a great deal
of skill and expertise.
THERMOCOAX products are widely used
and endorsed in many industries where
the highest quality and utmost reliability
are essential. All our mineral insulated
cables are manufactured in-house with our
proprietary and unique swaging procedure.
Since the early days of the 1950s, our
company has been supplying many different
product lines to both nuclear research centres
and nuclear power plants.
N°2.1384
Full Engineering
• Engineering and full technical assistance
at every stage of your project,
• Assembly workshops offering
semi-finished products as well as full
assemblies,
THERMOCOAX-HAMBURG Nr 512988841
Your Contact
Sales Dept International:
UK Sales office:
• Calibration Services
THERMOCOAX SAS
40 Bd Henri Sellier
F 92156 SURESNES Cedex
Tel.: +33 1 41 38 80 50
Fax: +33 1 41 38 80 70
info@thermocoax.com
• 3D design development
Germany Sales office:
THERMOCOAX UK Ltd.
Office N° 5
Manor Farm
Aubourn,
Lincolnshire LN5 9DX
Tel.: +44 1522 789 900
Fax: +44 1522 789 902
info-uk@thermocoax.com
• Welding (Laser, Plasma, TIG),
• Brazing (torch and vacuum brazing)
• Computer Aided Thermal and
Mechanical Modeling (Cosmos Works)
• THERMOCOAX Development
Laboratory has specialised equipment
to perform all kind of experiments,
lifetime tests, qualification programs
according to customers’ specific
requirements and official standards.
THERMOCOAX GmbH
Brookstieg 1
D 22145 STAPELFELD
Tel.: +49 40 66857 0
Fax: +49 40 66857 133
info@thermocoax.de
USA Sales office:
THERMOCOAX Inc.
6825 Shiloh Road East, Ste B-7
Alpharetta, GA 30005
Tel.: 800 298 3345
Fax: 678 947 4450
info@thermocoax.usa
The Netherlands Sales Office:
THERMOCOAX BV
Luchthavenweg 81
European Business Centre
Unit 2.23
5657 EA EINDHOVEN
Tel.: +31 40 295 95 58
Fax: +31 40 255 54 78
info-nl@thermocoax.com
http : www.thermocoax.com
Data subject to alteration without notice - Août 06
RCS CONDÉ S/ NOIREAU B 323 459 925 - N° TVA / VAT Nr : CEE FR 32 323 459 925
Head Office : Planquivon - F 61430 ATHIS DE L’ORNE France - THERMOCOAX S.A.S. au capital de 457 500 €
Capabilities
E 216-0