The Steam Turbine Adopts High-Speed Power Transmission Couplings

Flexible couplingswith high-speed transmission and high compensation for two axis displacement are often used in steam turbines, with the most commonly used being gear couplings and disc couplings. The design of industrial steam turbines using flexible couplings, the materials used for load-bearing parts, the control of manufacturing quality, inspection, and selection have all been regulated by corresponding national standards. The stability and service life of the transmission system in steam turbines and turbogenerators are key factors affecting the use of industrial steam turbines. The stability of the transmission system includes the ability of the transmission system to compensate for axial, radial, and angular displacement, as well as the balance of the coupling. There are many issues that affect the service life of the coupling, mainly the manufacturing strength of the coupling itself, including fatigue resistance and torsional stiffness.

At present, most industrial steam turbines use gear couplings and diaphragm couplings, and there are clear standards for manufacturing accuracy and service life of the couplings. Generally, the service life of the couplings should be able to be continuously used in the unit for more than 3 years. The coupling connecting bolts and shaft hole diameter (matching with the shaft) should strictly comply with national standard requirements. Our company, while conducting in-depth research on the national standards for couplings, strictly implements the material and heat treatment requirements in the national standards. After precision manufacturing of gear couplings and diaphragm couplings, the overall performance of the couplings meets or even exceeds the requirements of the national standards, and is highly praised by actual users both domestically and internationally!