Forged Rolled Rings and Related Components for the Wind Energy Industry
Our manufacturing site covers over 1.1 million square feet. We have established state-of-the-art fabrication, machining, assembly and finishing workshops and a state-of-the-art forging facility with a 4,500-ton press and a ring-rolling mill that employs our advanced axial close-die forging technology.
Due to our extensive manufacturing capabilities that are especially well-suited for components required in wind turbine manufacture, we believe that we are a major Chinese manufacturer of important components for that industry including:
- Large forged rolled rings
- Yaw bearings
- Tower flanges and
- Shafts used in large-scale windmills
At this facility we can manufacture rolled rings measuring up to 6.3 meters in diameter and a cross section up to 700mm and shafts used in wind turbine units, measuring 1MW-3MW.
Our rolled rings are essentially hollow cylindrical sections forged from a stainless steel stock of varying thickness and height. During the forging process, metal is pressed, pounded or squeezed under great pressure to create high strength parts. Rolled ring forging turns a hollow round piece of metal under extreme pressure against a rotating roller, thereby squeezing out a single-piece ring without any welding required.
We believe that forging provides increased strength and flexibility compared to a machined or cast part due to the nature of the grain flow in the metal part. A forged ring therefore has greater fatigue resistance and its higher strength also enables the manufacture of a ring of comparable integrity that is lighter and thinner.
High tangential strength and ductility make forged rings well-suited for torque- and pressure-resistant components, such as gears, engine bearings, wheel bearings, couplings, rotor spacers, sealed discs and cases.
Yaw bearings, which are found in every wind turbine, are made from rolled rings. Essentially, a yaw bearing is a large ring with teeth, all of which are either pointing outward or inward. The teeth allow the yaw bearing to engage with a smaller wheel attached to the yaw motor. The yaw motor turns the wind turbine so that the rotor (to which blades are attached) faces the wind in order to optimize electricity generation. The yaw bearing is used by the yaw motor to turn the wind turbine.