Analysis of Wear Types in Forward-Curved Fan Assemblies

Analysis of Wear Types in Forward-Curved Fan Assemblies

There are many causes of wear in forward-curved fan assemblies, most of which result from a combination of factors. The types of wear are as follows. 1. Abrasive Wear in Forward-Curved Fan Assemblies Within a forward-curved fan assembly, solid particles move relative to the component surfaces at specific speeds, causing wear. The filling effect under relative motion and the grinding effect of solid particles dispersed at the interfaces cause wear on contact surfaces such as the blades. This significantly affects the wear rate of the impeller. 2. Fatigue Wear in Forward-Curved Fan Assemblies Fatigue wear refers to surface cracks or flaking caused by surface fatigue stress (or temperature or impact). 3. Erosion and Wear in Forward-Curved Fan Assemblies Surface wear caused by the erosion of solid particles on metal surfaces is known as erosion wear. 4. Adhesive Wear in Forward-Curved Fan Assemblies Under identical conditions, wear does not decrease even if machining precision and surface cleanliness are improved to enhance fit. On the contrary, due to the close proximity of the interface and the significant molecular adsorption effect, interfacial wear—known as adhesive wear—increases. In other words, from the perspective of propeller damage, the types and locations of wear vary among different propeller designs. However, the primary wear patterns are those described above, all of which are localized wear. The wear occurs mainly near the working surfaces of the blades and the backplate.