The abrasion of a pump refers to the repeated impact of solid particles on the overcurrent components of a sewage pump during the transportation of solid media, resulting in severe wear and tear of the overcurrent components of the pump. The vast majority of sewage transportation involves solid-liquid mixing, and how to prevent and reduce the erosion of pumps by solid particles is one of the key research directions for various enterprises and academia. The following are three commonly adopted measures at present.
1.Optimize the hydraulic design of pumps
When selecting a pump, full consideration should be given to its anti abrasion performance. For example, if the solid is relatively hard, when choosing a slurry pump, the pump speed should be minimized as much as possible. The new type of corrosion-resistant and frosted slurry pump impeller uses an increase in the pump inlet angle and a decrease in the blade outlet angle, which can reduce the uneven abrasion of the impeller blades.
2.Surface treatment technology
The ceramic coating technology widely used in the early days is to apply glass enamel on the surface of a metal substrate, and after high-temperature firing, it retains both the mechanical strength of the metal and the corrosion and wear resistance of the glass. In recent years, many surface treatment techniques have emerged, such as spraying composite material coatings inside the impeller and pump chamber. These techniques can form a * surface on the impeller surface, increasing the pump's resistance to abrasion.
3.Anti abrasion material
To prevent and reduce the abrasion of solid particles on the flow passage components, in addition to improving the hydraulic design and controlling the operating conditions of the pump, enhancing the anti-wear performance of the flow passage components of the pump and developing anti-wear materials are the fundamental solutions to solve abrasion. Metal ceramics and polymer wear-resistant materials are widely used in pump types such as sewage pumps and mortar pumps.
