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Pitch Bearing
The pitch bearing, also named blade bearing, is a component of modern wind turbines which connect the rotor hub and the rotor blade. The bearing allows the required oscillation to control the loads and power of the wind turbine. The pitch system brings the blade to the desired position by adapting the aerodynamic angle of attack. The pitch system is also used for emergency breaks of the turbine system. Design Mostly large rolling element bearing are used as pitch bearings. The bearing is subjected to high bending moments, radial and axial loads in both directions. Therefore, the rolling elements for state of the art wind turbines are ball bearings, which are used in a double rowed four-point contact. This means each raceway carries on two points, and in sum four points are carrying. Other possible options are different arrangements of the rolling elements or multirow cylindrical roller bearings. Pitch bearing of modern wind turbines can reach diameters of more than 4 meters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hub Secured To Turbine Tower No 11 - Geograph
A hub is the central part of a wheel that connects the axle to the wheel itself. Hub, The Hub, or hubs may refer to: Geography Pakistan * Hub Tehsil, Balochistan, an administrative division ** Hub, Balochistan, capital city of the tehsil * Hub Dam, in Balochistan * Hub River, in Balochistan United States * Hub, California, an unincorporated community * Hub, Mississippi, an unincorporated community Elsewhere * Hub Nunatak, Graham Land, Antarctica Buildings in the United States * HUB Tower, Des Moines, Iowa * Hub (Minneapolis, Minnesota), a residential apartment building in Minneapolis * Hub Building, Burwell, Nebraska, on the National Register of Historic Places Organizations * Harvard University Band * Hogeschool-Universiteit Brussel, Belgium * Hub International, a North American insurer * Hub Power Company, first and largest Pakistani Independent Power Producer Transport * Airline hub * Transport hub Codes * HUB, Guobiao abbreviation of Hubei, a province of China * HU ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reciprocating Motion
Reciprocating motion, also called reciprocation, is a repetitive up-and-down or back-and-forth linear motion. It is found in a wide range of mechanisms, including reciprocating engines and pumps. The two opposite motions that comprise a single reciprocation cycle are called strokes. A crank can be used to convert into reciprocating motion, or conversely turn reciprocating motion into circular motion. For example, inside an internal combustion engine (a type of reciprocating engine), the expansion of burning fuel in the cylinders periodically pushes the piston down, which, through the connecting rod, turns the crankshaft. The continuing rotation of the crankshaft drives the piston back up, ready for the next cycle. The piston moves in a reciprocating motion, which is converted into circular motion of the crankshaft, which ultimately propels the vehicle or does other useful work. The reciprocating motion of a pump piston is close to, but different from, sinusoidal simple harmon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
