Which pumps can be lubricated with oil mist
Thread Content
The device is equipped with an oil mist lubrication system, but not all pumps are lubricated using this method. Several high-pressure pumps have their own oil stations and oil pumps, while other smaller pumps do not make use of oil mist lubrication. May I ask what the reason is? For example, the two pumps below are almost identical; the only differences lie in flow rate and head. However, only P2 uses oil mist lubrication. For P1: effective NPSH (6), operating temperature (320), fluid density (663), flow rate (605/756.5), head (129). For P2: effective NPSH (6), operating temperature (320), fluid density (663), flow rate (510/561), head (179)
Personally, I think it’s due to the design by the device manufacturer! If you request oil mist lubrication, it should also be possible to do that
In the wax oil unit, except for the feed pump which is pressure-lubricated, all other pumps are oil-mist lubricated.
Firstly, to use oil mist lubrication, it is necessary for the pump manufacturer to design the pump with a structure suitable for oil mist lubrication； Secondly, oil mist lubrication eliminates the need for each pump to have its oil level checked and refilled, which enhances the stability of the pumps’ operation ； Once again, when the medium temperature is high and the working station is of significant importance, oil mist lubrication can be considered ； Finally, oil mist lubrication increases costs; if the company does not consider labor costs and relies on manual labor, there is no need to implement it.
It still depends on whether the user has submitted a request to use it. Most roller bearings with light loads can be lubricated using oil mist. In the situation you gave as an example, the problem does not lie in factors such as flow rate, head, or net positive suction head. If it is equipment to be purchased, this can be proposed by the lead designer; if it is a retrofitting project, then it is necessary to consider whether the bearing housing structure provides enough space for adding oil mist nozzles. If the conditions are met, it can be implemented now as well.