Describes the working state of bearings during the operation of melt pumps
Domestic professional melt pump manufacturer, Bart Melt Pump Company has many years of melt pump R&D and production experience, to provide special melt gear pump equipment for domestic plastic extrusion system, to meet the user's demand for equipment performance. Zhengzhou Bate Melt Pump Manufacturer specifically introduces the bearing state of the melt pump during its use.
The optimum working condition of the sliding bearing of the melt pump should be that the driving shaft and the inner surface of the sliding bearing can form a relatively uniform liquid film, which can completely separate the shaft from the two metal surfaces of the sliding bearing, and the liquid film will play the role of supporting the load of the shaft. When the melt pump stops running, the journal will be at the bottom of the sliding bearing, the two metal surfaces will contact directly, and the gap between the shaft and the bearing is not lubricated by melt. At the beginning of starting, the bearing will be in dry friction. When the melt transported by the gear pump increases continuously and the outlet pressure increases gradually, part of the melt enters the bearing clearance from the guide groove under the action of the pressure difference between the outlet and the inlet. With the uniform rotation of the shaft, a kind of melt film will form on the surface of the shaft and the bearing. At this time, the friction between the two metal surfaces will gradually decrease.