Steam Turbine Blades Product Introduction and Core Advantages
1. Product Overview
Steam Turbine Blades are the core working components of steam turbines, responsible for converting the thermal energy of high-temperature, high-pressure steam into mechanical energy to drive generators or industrial equipment. Based on operational environments and functional requirements, blades are categorized into Moving Blades and Stationary Blades, widely used in power generation, petrochemicals, marine propulsion, and other fields.
2. Product Classification and Features
1. Classification by Installation Position
| Type | Function | Typical Applications |
|---|---|---|
| High-Pressure Stage Blades | Withstand high-temperature (≤600°C), high-pressure (6-16MPa) steam impact; material primarily 12%Cr heat-resistant steel | Ultra-supercritical coal-fired power plants |
| Intermediate-Pressure Stage Blades | Operate under medium temperature/pressure; require corrosion-fatigue resistance; commonly use precipitation-hardening stainless steel (e.g., 17-4PH) | Combined-cycle units, industrial drive turbines |
| Low-Pressure Stage Blades | Feature extra-long final-stage blades (1.2-1.8m); resist wet steam erosion; made of titanium alloy or martensitic stainless steel | Nuclear turbines, seawater desalination equipment |
2. Classification by Design Technology
Constant-Section Blades: Suitable for stable low-load conditions; cost-effective.
Variable-Section Twisted Blades: 3D aerodynamic optimization improves efficiency by 5-8% (e.g., Siemens 3D-Aero Blades).
Hollow Cooling Blades: Used in gas turbines; internal film cooling withstands temperatures up to 1400°C.
3. Core Advantages
1. Material and Manufacturing Superiority
High-Temperature Alloys:
High-pressure blades use Inconel 718 or TD-NiCr coating, resisting oxidation at 650°C.
Low-pressure final-stage blades employ Ti-6Al-4V titanium alloy, with erosion rates <0.05mm/year.
Precision Manufacturing:
5-axis milling (±0.02mm tolerance) + electrochemical machining (ECM) to reduce residual stress.
Laser cladding repair technology extends lifespan by over 30%.
2. High-Efficiency Aerodynamic Performance
Profile Optimization:
CFD-based aft-loaded design minimizes boundary layer separation, achieving >90% efficiency.
Integrated labyrinth seal teeth at blade tips reduce leakage loss (<1.5%).
3. Longevity and Reliability
Fatigue-Resistant Design:
Fir-tree root attachment (DIN 268 standard) ensures >10^7 fatigue cycles.
Shot peening (100% coverage) enhances fretting wear resistance.
Smart Monitoring:
Embedded fiber-optic sensors provide real-time stress/temperature monitoring (±1°C accuracy).
4. Energy Efficiency & Environmental Compliance
Reduces coal consumption by 2-3g/kWh (vs. conventional straight blades).
Noise levels <85dB(A), compliant with ISO 3744.
4. Comparison with Conventional Blades
| Metric | Modern High-Efficiency Blades | Traditional Constant-Section Blades |
|---|---|---|
| Efficiency | 88-92% | 80-85% |
| Lifespan | >100,000 hours | 60,000-80,000 hours |
| Maintenance Cost | 40% annual reduction | Frequent replacements |
5. Application Cases
Power Industry:
Shanghai Electric’s 1000MW ultra-supercritical unit blade set achieves 47% thermal efficiency.
Marine Propulsion:
MAN B&W marine turbine blades operate 200,000+ hours without major overhaul.
Harsh Environments:
Geothermal power plant blades with chloride-ion resistance (Hastelloy C276 material).
6. Customization and Support Services
Tailored Design: Provides full-process simulation reports (ANSYS/Fluent) covering aerodynamics, strength, and vibration.
After-Sales Guarantee:
18-month warranty, lifetime technical support.
Global spare parts delivery within 72 hours.
Note: Complimentary selection guide available based on steam parameters (pressure/temperature/flow). Contact us for material certifications or test data.
(This document adheres to IEC/ASME standards, with key parameters certified by TÜV.)