Introduction to Wear-Prone Components in the 919 High-Pressure Centrifugal Fan

Introduction to Wear-Prone Components in the 919 High-Pressure Centrifugal Fan

When employing specific 919 high-pressure centrifugal fans, it is observed that equipment may consistently exhibit partial wear. That is to say, certain components of the machinery are particularly susceptible to abrasion. During operation of the 919 high-pressure centrifugal fan, two primary wear components are present: the blades and the scroll. This phenomenon is especially pronounced in power stations. First, an overview of wear patterns in the 919 high-pressure centrifugal fan. Wear varies between individual units. For instance, some 919 high-pressure centrifugal fans exhibit severe wear on the front blades. The primary wear points are the blade inlet, outlet, and the root of the basket plate. Certain 919 high-pressure centrifugal fans also employ radial straight-through blades. Wear on these blades typically presents as follows: Typically exhibiting a serrated pattern, wear predominantly concentrates at the blade outlet, with gradual weakening progressing inward from this point. Beyond these two scenarios, certain blades employed in 919 high-pressure centrifugal fans feature rear-mounted airfoil designs. For these blades, the most severely worn sections are the back plate and the outlet region near the blade tip. Once the blade tip wears, coal dust readily infiltrates the blade cavity, progressively compromising rotor balance and causing issues such as vibration in the 919 high-pressure centrifugal fan. A blade type known as a straight blade exists. When employed in the 919 high-pressure centrifugal fan, the blade outlet often exhibits wear patterns approaching the centre plate side. Let us examine the wear patterns in the 919 high-pressure centrifugal fan. Regardless of centrifugal fan type, vortex wear patterns are fundamentally consistent, with the most severe damage occurring near the vortex tongue. Wear on the 919 high-pressure centrifugal fan vortex typically commences at the vortex tongue, intensifying significantly when wear reaches one-sixth to one-quarter of the preheating line.