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Core Function
The high-pressure rotor shaft (HP Rotor), medium-pressure rotor shaft (IP Rotor), and low-pressure rotor shaft (LP Rotor) are the core load-bearing and power transmission components within the steam turbine rotor system. They perform critical functions such as transmitting torque, supporting moving blades, and connecting to the generator or load equipment. Their structural strength, manufacturing precision, and material properties directly impact the operational safety, efficiency level, and service life of the steam turbine.
Material Selection for Different Applications
High- and medium-pressure rotor shafts are typically manufactured from high-quality alloy steel forgings (such as Cr-Mo-V series or Ni-Cr-Mo series steels), offering excellent high-temperature strength, creep resistance, and thermal fatigue resistance. This makes them suitable for high-temperature, high-pressure, and high-speed steam operating conditions. Low-pressure rotor shafts, which primarily endure large diameters, high torque, and complex alternating loads, often utilize high-strength low-alloy steels or specialized low-pressure rotor steels. This material selection balances strength, toughness, and stress corrosion cracking resistance, making them appropriate for low-pressure, high-volume steam environments.
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Standards Compliance & Customized Support
Our products can be manufactured in compliance with relevant standards such as GB, DIN, and ISO according to customer requirements, accompanied by complete quality documentation and inspection reports. Furthermore, based on specific customer unit parameters and operating conditions, we can provide optimization suggestions for rotor shaft structures, material selection support, and manufacturing feasibility analysis.
Leveraging mature manufacturing expertise and a comprehensive quality system, our high-pressure, medium-pressure, and low-pressure steam turbine rotor shafts offer high strength, exceptional reliability, long service life, and excellent engineering adaptability. They are well-suited to meet the application requirements of various steam turbine projects.
Machining Process
The key forgings for rotor shafts produced by our company undergo stringent controls in smelting, forging, and heat treatment to ensure uniform microstructure and internal denseness. During machining, critical areas such as the journal, sealing zones, disc locating surfaces, and coupling sections are processed using large-scale CNC lathes, CNC grinders, and specialized finishing equipment. This ensures strict control over roundness, coaxiality, and surface roughness, meeting the requirements for dynamic balance and shafting stability in high-speed rotating equipment.
Finish Turning
Finish Turning
Finish Turning
Product Inspection
All rotor shafts from our company are subject to rigorous quality control procedures. Key manufacturing stages involve non-destructive testing such as Ultrasonic Testing (UT) and Magnetic Particle Testing (MT), along with necessary dimensional and performance inspections. Upon completion of manufacturing, run-out test and roughness test are conducted to guarantee smooth, safe, and reliable rotor operation.
Run-Out Test
Roughness Test
