Custom-designed for harsh applications such as gas turbine wheel compartments, this customized thermocouple cable ensures the accuracy and reliability of temperature measurement in extreme environments through its precision structure and high-performance materials.
The core of the cable is an N-type thermocouple, composed of Nicrosil and Nisil alloys. These alloys are renowned for their exceptional stability and accuracy in high-temperature oxidizing environments. The N-type thermocouple is regarded as an improved version of the K-type thermocouple, featuring better thermoelectric stability and resistance to high-temperature oxidation. It exhibits excellent linearity especially within the temperature range of 400 to 1300°C. Its conductor adopts a 7/24 stranded structure with 16 AWG specification; this design enhances the cable's flexibility and resistance to mechanical fatigue, which is crucial for application scenarios like gas turbines where vibration and thermal cycling exist.
Insulation and Shielding: Ensuring Signal Integrity
The insulation layer of the cable is made of high-performance perfluoroalkoxy alkane (PFA). As a fluoropolymer, PFA is well-known for its wide operating temperature range, excellent electrical insulation properties, and outstanding chemical inertness. It can withstand temperatures up to 260°C and resist corrosion from most strong acids, strong alkalis, and organic solvents. The orange and red PFA insulation layers not only provide electrical isolation but also their color coding facilitates polarity identification during installation.
To minimize electromagnetic interference (EMI), the insulated conductors are twisted together. Additionally, the cable includes a 20 AWG stranded grounding wire and is covered with a nickel-plated copper braided shield. This multi-layer shielding structure provides solid protection for maintaining signal integrity in environments with strong electrical noise, such as gas turbines.
Outer Sheath and Overall Design
(Note: The original text lacks specific content about the outer sheath and overall design. The translation retains the title as per the original structure, and if there is supplementary information about the outer sheath and overall design later, it can be translated and added accordingly.)
Performance and Applications: Aerospace-Grade Reliability
Every design detail of this thermocouple cable is intended to meet the strict standards required for aerospace applications. Its key performances include:
- High-precision measurement
- Excellent stability
- Strong anti-interference capability: The combination of twisted conductors, grounding wire, and braided shield provides robust EMI/RFI protection.
- Outstanding environmental resistance: The use of PFA materials ensures the cable can work reliably in high-temperature and chemically corrosive environments.
- Mechanical durability: The stranded conductor structure improves the cable's bending life, making it suitable for application environments with vibration and thermal cycling.
In conclusion, through its carefully selected materials and precision structural design, this customized thermocouple cable provides a highly reliable and durable solution for accurate temperature monitoring in extreme environments such as gas turbine wheel compartments.
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