Look at the markings on the bolts.
1. Low-temperature bolts: Bolts whose use environment is lower than the ambient temperature are called low-temperature bolts. Ships, aviation equipment, aerospace equipment, offshore drilling platforms, offshore operation equipment, wind turbines, deep water operation equipment, freezing warehouses, refrigeration equipment, etc. The performance is stable at a temperature of -50 degrees. The impact energy J can reach about 60J. Effectively meet equipment needs.
2. Bolts: mechanical parts, cylindrical threaded fasteners equipped with nuts. A type of fastener consisting of a head and a screw (cylinder with external threads). It needs to be matched with a nut and is used to fasten and connect two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.
If the vibration is large during normal power generation, it is likely that the main transmission chain (such as main bearings, gearboxes and generators) has mechanical faults, such as bearing wear or damage, high-speed shaft misalignment, or loose ends. It is caused by loose bolts, loose copper bars of the generator rotor, or unbalanced fan blades. It is recommended to find domestic professional companies such as Beijing Hanergy Technology, Goldwind Tianyuan and other companies to conduct a comprehensive vibration detection. It is best to use a multi-channel synchronous acquisition system, so that the cause of the fault can be found in about half an hour at a time. Early action can avoid serious failures. One of the wind farms of our brother company was vibrating so much that the coupling flew off. What a danger!