There are many factors that cause the wear of centrifugal fans, and most of them result from the combined action of multiple mechanisms. Typical wear is erosion wear and abrasive wear. Solid particles interact with the wall after entering the impeller. In the inlet area of the centrifugal flow channel and the whole axial flow channel, the solid particles are basically under the integrated effect of the entrainment and self inertia of the air flow, and the non zero angle of attack is on the collision wall and then bounces into the flow channel. The wear of the wall material is typical. Erosion wear. In the outlet area of the centrifugal flow channel, the dust particles move a long distance in the flow path, most of which collide with the wall, basically sliding or rolling along the pressure surface, and having a certain pressure on the wall, so the wear of the back material belongs to the abrasion type of dust particles, and the dust particles are pressed. The concentration of the area near the force surface is more harmful to the wear of particles.
磨损的种类有：The types of wear are:
1 abrasive wear
In the fan, the relative movement of the solid particles with the surface of the parts at a certain speed will cause abrasive wear. The uneven surface of contact is caused by the filing effect under relative motion or the abrasive wear caused by dispersed solid particles between the interfaces. It affects the degree of abrasion of the impeller .
2 adsorption wear
When the other conditions are the same, even improving the machining accuracy grade and cleanliness of the machined surface makes each other better, but the wear is not reduced, but the interface is close to the interface, and the molecular adsorption is significant, which aggravates the wear of the interface, which is called the adsorption wear.
3 scour wear
Surface abrasion caused by erosion of solid particles on the metal surface is known as erosion wear.
4 fatigue wear
Fatigue failure is caused by surface fatigue stress (or temperature or impact) causing surface cracks or scaling off. In short, from the damaged impeller, the wear and tear of various forms of impeller are different. However, the wear pattern is mainly composed of the above and local wear. The worn parts are mainly located in the working face of the blade and near the rear plate.
标签:   钣金加工 离心风机 钣金加工厂家