Customized Integrally Forged Steam Turbine Main Shaft with High-Speed Dynamic Balancing and Precision CNC Finish Machining
Product Details
The steam turbine main shaft serves as the core load-bearing rotating component of the entire turbine unit. Assembled with turbine disks, impellers, and coupling hubs, it transmits power from turbine rotors to generators or driven machinery while withstanding significant torque, bending loads, alternating thermal stress, and vibration. Material quality, forging integrity, and machining precision directly determine the turbine's safety, stability, and service life.
We provide fully customized manufacturing solutions for turbine main shafts, covering applications in large thermal power turbines, medium and small industrial turbines, waste heat turbines, back-pressure turbines, and condensing turbines. Our production includes integral forged main shafts and extended composite main shafts manufactured strictly according to customer drawings and power industry standards. Services support both new unit manufacturing and overhaul replacement, with optional Stellite hardfacing on shaft journal and sealing areas.
- Integrally forged turbine main shaft (mainstream type for high reliability)
- Extended composite main shaft
- Modified main shaft for unit upgrading & retrofitting
- Generator connecting main shaft
30Cr2Ni4MoV, 25Cr2MoV, 42CrMo, 34CrNiMo6, and other high-strength dedicated rotor alloy steels. Material selection depends on operating temperature, rotating speed, torque, and medium conditions.
- Drawing verification & technical parameter confirmation
- High-quality steel ingot smelting & heavy forging
- Multi-cycle normalizing and tempering heat treatment
- Rough turning & rough machining
- Stress relief annealing
- Precision CNC finish machining: shaft journals, sealing sections, rotor wheel fitting sections, thread and coupling flange
- Optional: Stellite alloy hardfacing for wear-resistant positions
- Precision inspection: concentricity, runout, dimensional tolerance
- Strict multi-standard non-destructive testing: UT, MT, PT to detect internal and surface defects
- High-speed dynamic balancing test
- Anti-rust protection and export wooden case packaging
Utilize qualified heavy forgings with standardized multi-stage heat treatment for uniform grain distribution, excellent toughness, creep resistance, and fatigue resistance, effectively preventing crack risks under long-term high-speed rotation and alternating loads.
Precision turning and grinding ensure low concentricity error and stable dimensional accuracy of shaft journals, reducing vibration during operation, protecting bearing bushes, and extending the service cycle of the entire unit.
Custom production based on customer drawings with various overall lengths, shaft diameters, wheel fitting positions, and connection flange forms. We also provide structural optimization schemes for old turbine transformation projects.
Full set of certification files including raw material test reports, forging records, heat treatment curves, machining inspection data, NDT certificates, and dynamic balancing reports, meeting international power industry standards.
Suitable for power generation turbines, waste heat utilization turbines, and mechanical drive turbines widely used in chemical industry, metallurgy, and papermaking applications.
- Thermal power generation steam turbines
- Cogeneration & heating industrial turbines
- Waste heat recovery steam turbines
- Small & medium condensing / back-pressure turbines
- Mechanical drive turbines for pumps, fans and compressors
| Component drawings (CAD / PDF) |
| Total length, shaft journal diameter, fitting size for turbine disks |
| Design rotating speed, working temperature and transmission torque |
| Required material grade |
| Requirements for NDT and dynamic balancing |
| Whether surface hardfacing is needed |
| Order quantity and delivery schedule |
Mr. Tom Hu
General Manager
- Email: tom.hu@huanxiang-industrial.com
- Tel: +86-13618387300
- WhatsApp: 8613618387300
-
WeChat:
+86-13271888325
- Skype: hsh548
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