This question is complex. The current dominant method is vacuum resin transfer technology, which prepares each component separately and then molds the high-pressure and low-pressure sheets together to form a whole. The details would take thousands of words. Vestas, LM, GE, Goldwind, Sany, AVIC Huiteng, etc. all use this technology. Siemens has integrated molding technology, that is, the high pressure sheet and the low pressure sheet are molded together, thereby reducing the mold clamping process. Some blades, of relatively regular shape, are also formed by the winding method. Japan is also developing a thermoplastic blade that joins fibrous materials and solid resin, heats the mold to melt the resin, and cools it to form it.
"If the hydraulic vibration is large,
it should be used with a large load." Maybe an engineercivilian told you. For operation of Francis or axial flow turbines, avoid. It is okay to operate in poor operating condition area with low load. In an area in optimal working condition with a greater load, the vibration may be lower. However, if the water conduction vibration is severe, it means your device may have other problems. , and blindly avoiding it will not be a long-term plan.