Steam Turbine Coupling Hub Forgings for Thermal Power

The Steam Turbine Coupling Hub is a high-strength forged component designed to provide precise alignment and secure connection between steam turbine shafts and downstream rotating equipment in thermal power plants. Manufactured from premium Alloy Steel, it offers excellent structural integrity, dimensional stability, and long-term reliability under high-speed, high-temperature operating conditions. This hub is ideal for medium- to large-scale steam turbines where strength, operational safety, and consistent performance are critical.

Key Features & Advantages

Coupling Hub Features

• Precision Torque Transmission: Engineered to transfer full rotor torque reliably under high load.
• Optimized Metallurgy: Forged from premium alloy steels for high strength, fatigue resistance, and thermal stability.
• Accurate Rotor Alignment: CNC Machining ensures tight tolerances for seamless rotor-generator integration.
• Durable Design: Resistant to wear, deformation, and high centrifugal stress over long-term operation.

Half Coupling Features

• Ease of Assembly: Designed for efficient installation and maintenance.
• High Load Capacity: Supports torque transmission and axial alignment together with the hub.
• Precision Machined Interfaces: Guarantees seamless connection with turbine rotor and generator shaft.
• Heat Treated for Performance: Customized quenching and tempering processes enhance strength and fatigue resistance.

Manufacturing Process & Quality Assurance

Our hubs are produced with integrated forging, Heat Treatment, and precision machining capabilities to ensure high-quality and consistent performance:

• Material Selection & Inspection: Alloy steel is rigorously checked for chemical composition, mechanical properties, and surface quality.
• Precision Forging: Open-die forging shapes the hub blank, optimizing grain flow and structural strength.
• Heat Treatment: Quenching and tempering or customized processes provide required hardness, toughness, and uniformity.
• Dimensional Machining: Semi-finishing and final machining create inner bores, flanges, and key interfaces with tight tolerances (up to ±0.01 mm).
• Quality Verification: Critical dimensions and internal integrity are confirmed using non-destructive inspection and standardized testing.
• Packaging & Traceability: Components are cleaned, protected, and securely packaged with permanent marking for full traceability.

Product Specifications

• Material: Alloy steel (e.g., 42CrMo4, 34CrNiMo6, or customer-specified)
• Outer Diameter: Up to 400 mm
• Height / Thickness: Up to 800 mm
• Inner Bore: Smooth or keyed, according to turbine interface
• Flange Pattern: Customer-specified bolt arrangement
• Tolerance: Up to ±0.01 mm
• Heat Treatment: Quenching & tempering or customized
• Certification: ISO 9001, customer-specific standards

Applications

• Steam turbines in thermal power plants – connecting turbine shafts to auxiliary rotating systems.
• Heavy-duty rotating equipment – pumps, compressors, and mechanical drive assemblies requiring precise alignment.
• Industrial turbine systems – high-strength hubs for energy-intensive applications.

Why Liaoyuan

With nearly 30-year of forging expertise, Liaoyuan provides high-integrity components for demanding power generation equipment. Our integrated process—from material selection and forging to heat treatment and precision machining—ensures that each hub meets stringent dimensional, metallurgical, and performance requirements. This makes our Steam Turbine Coupling Hubs an ideal choice for thermal power applications requiring reliable, traceable, and long-lasting forged components.