As a “special force” in the field of temperature sensing, the WZPK2-1016 armored thermal resistance is leading the temperature measurement revolution in high-temperature environments with its unique oxidation protection technology and life-enhancing design. Now we will deeply analyze how this sensor breaks through the multiple challenges of materials, structure and operation and maintenance, and escorts the safe operation of supercritical units.

I. High-temperature survival rules of supercritical units

When supercritical units are in operation, the steam temperature can reach above 600℃, the pressure exceeds 25MPa, and it is accompanied by severe vibration and complex chemical environment. Traditional thermal resistors often face three “desperate situations” in this environment:

1. Oxidation corrosion: metal protective sleeves and leads are prone to oxidation reactions with oxygen at high temperatures, resulting in resistance drift or even component breakage;

2. Mechanical fatigue: the cyclic stress of unit vibration and thermal expansion and contraction causes conventional sensors to frequently break leads or damage the insulation layer;

3. Signal attenuation: high temperature environment accelerates the aging of cable insulation layer, causing signal transmission distortion or interruption.

II. WZPK2-1016′s “Triple Armor” Protection System

1. Material Revolution: The Golden Combination of Stainless Steel + Ceramic Insulator

WZPK2-1016 uses 316L stainless steel protective sleeve, which has a chromium content of up to 16%-18% and a nickel content of 8%-12%, and can still maintain excellent corrosion resistance under high temperature and high pressure. The sleeve is filled with boron nitride ceramic insulators. This ultra-high temperature ceramic material not only has low thermal conductivity, but also maintains structural stability under 1600℃ environment, forming a physical and chemical double barrier.

2. Structural Innovation: Miniaturization and Flexible Design

WZPK2-1016 has a tensile strength of ≥800MPa. Its spiral corrugated pipe structure can be freely bent within the range of ±50mm, perfectly adapting to complex installation scenarios such as boiler elbows and turbine cylinders. This design not only reduces stress concentration, but also shortens the thermal response time to less than 0.5 seconds, meeting the needs of supercritical units for rapid temperature adjustment.

3. Oxidation inhibition: surface coating and dynamic sealing technology

The sensor surface adopts graphene/carbon nanotube composite coating, which can still maintain an anti-oxidation rate of more than 95% at 600℃, and the friction coefficient is as low as 0.05, which effectively reduces vibration wear. The junction box adopts a metal-ceramic composite sealing structure, and the double protection of spring compression and silicone rubber sealing ring makes the IP68 waterproof level continue to be effective in high-temperature steam environment.

III. “Black Technology” Combination Punch for Extended Life

1. Intelligent Redundancy Design: Dual-Channel Self-Test System

WZPK2-1016 has built-in dual platinum resistance elements, and realizes fault self-test and automatic switching through three-wire independent power supply and signal transmission. When the resistance value of the main channel is abnormal, the system can switch to the backup channel within 0.1 seconds without stopping for maintenance. Application data of a 660MW coal-fired unit shows that this design increases the average failure-free time of the sensor from 800 hours to 3500 hours.

2. Thermal management optimization: gradient heat dissipation structure

The sensor adopts a concentric multi-layer heat dissipation design: the inner layer is an aluminum nitride ceramic heat conduction layer, the middle layer is an air gap insulation layer, and the outer layer is a stainless steel protective layer. This structure makes the temperature of the temperature sensing element 15-20℃ lower than the ambient temperature, significantly delaying material aging.

In the “high temperature and high pressure contest” of the supercritical unit, the WZPK2-1016 armored thermal resistor has built a comprehensive protection system with material innovation, structural optimization and intelligent operation and maintenance as the core. It not only extends the life of the equipment, but also brings the accuracy and reliability of temperature monitoring to a new level.

When looking for high-quality, reliable thermal resistance, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
PT100 Temprature sensor WZP-187
Hydraulic motor stroke sensor DEH-LVDT-100-6
linear displacement transducer 4000TDZ-A
Stainless pressure vacuum gage ZJTFXC-150
LVDT Sensor TD-1GN-050-15-01-01
Oil level gauge KCY-15/16-900/3/10
high precision lvdt TDZ-1G-43
Large bolt electric heater ZJ-20-72
Integrated Hall Speed Sensor ZS-04-180-8000
Infrared Hotspot Probe HSDS-20/T
Fuse XRNP
hall effect displacement sensor TD-1-100S
POSITIONER SVX102-XNSDX-AXX-MD
magnetic pickup speed sensor CS-1 D-065-05-01
Resistance Temperature Detector WZPK-236SA
Fan for forced air cooling of dry type power transformers GFD780-200
RELAY ASSEMBLY YT-320
Furnace tube leakage sensor BLD-3B
speed sensor HTC-40D10ES
Sodium Probe for HK-51 Model: 5201S-L9-0.6M
Stainless manometer YJTF-100
pressure transducer sensor BPSN4KB25XFSP12
Card Module CPU M8350
Monolithic pilot light XB2BVQ4LC
voltage sensor CE-VM01-52MS1-0.2
Integrated Oil Level Vibration Temperature Three-parameter Combination Probe SWZQ-3C1
SPEED SENSOR D110 05 01
SENSOR DISPLACEMENT HTD-150-3
Electric heating intelligent protection controller HIPC3