Wear mechanism of pump car pipe
We use according to the number of the company’s concrete track pump, pipeline pump service life of the pipeline is not only related to the material itself, but also with the physical properties (mainly the abrasive particle size and hardness) is directly related to the wear particles on the material erosion angle of greatest impact.
1. The particle and shape of the material
Different transportation materials will affect the service life of pipelines. According to our observation, the concrete with cobblestones is less worn, and the concrete with broken stones is worn away.
2, velocity and pressure
The different parts of the same pump, depending on the pressure or flow rate, are different. In general, the first section of the elbow pipe and the last section of the output of the pump wear the most.
3. The angle of erosion
The test shows that when the particle erosion angle is 0 degrees, the abrasive wear is the main factor. The proportion of abrasive wear decreases with the increase of the spray angle, and the proportion of surface fatigue wear increases correspondingly. When the angle is 90, the surface fatigue wear is dominant. At this time, the toughness of materials is very important. The wear rate of materials with good toughness is low, for example, the erosion angle of rubber to 90 degree is the best anti-wear material, while the erosion angle for 0 degree is the worst material.
The relation curve of erosion wear and erosion angle of three different materials of ceramic, metal and rubber.
It can be seen from the diagram that the wear loss of ceramic material is the smallest when it is worn at small angle. The wear of pump pipe is the result of abrasive wear and surface fatigue wear. No matter straight pipe or elbow, abrasive wear is the dominant factor. The steel material with lower hardness is not suitable at this time. In order to improve the service life of the pipe, a kind of material with high hardness and toughness must be found to replace the traditional steel. Ceramic material has high hardness and high toughness. It is the most ideal material for anti abrasion of pump car, and it is widely used in foreign countries.