Manufacturer of Turbine Components
Manufactures various types of steam turbines ranging from 5MW - 50MW,including condensing, backpressure, and extraction-condensing designs
Cylinder Bolt
Turbine cylinder bolts serve as critical high-temperature, high-pressure fasteners securing the upper and lower turbine cylinders (or cylinders to flanges).
Category:
Steam Turbine Bolts and Nuts
key word:
Product Introduction
Turbine cylinder bolts serve as critical high-temperature, high-pressure fasteners securing the upper and lower turbine cylinders (or cylinders to flanges). Their primary function is to compress the cylinder joint surface seal, withstand internal/external pressure differentials and thermal stresses, ensuring tight sealing and structural stability under extreme conditions. This prevents main steam/reheated steam leakage, directly determining unit operational safety and thermal efficiency. Materials for high-temperature bolts must exhibit excellent mechanical properties, corrosion resistance, and resistance to relaxation.
1. Primary Functions:
1) Withstand steam pressure and complex loading conditions.
2) Ensure tight sealing.
3) Accommodate thermal expansion.
4) Maintain stable preload under prolonged high-temperature and frequent start-stop conditions, preventing preload decay due to material creep or thermal fatigue to ensure long-term sealing reliability.
2. Structural Types:
Primarily categorized as ultra-high-temperature bolts, high-temperature bolts, and medium-low-temperature bolts based on application scenarios.
3. Common Failures:
1) Bolt creep deformation at high temperatures;
2) Bolt loosening causing leakage at cylinder joint surfaces or steam seal body joint surfaces;
3) Bolt fracture;
4) Bolt corrosion and high-temperature oxidation;
5) Bolt and nut adhesion or seizing.
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A production-oriented enterprise specializing in the processing, production, and research and development of steam turbine components