Mechanical seal
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For a hot oil pump, there is paraffin oil used as sealing oil, oil mist for lubrication, and white oil for sealing – where exactly are the injection points for these three substances? What are their respective functions?
Wax oil: Used as a medium in self-flushing systems; oil mist is used for lubricating bearings, while white oil is used to cool mechanical seals
Wax oil is used for sealing purposes, as per Plan No. 32; generally, light diesel is used for sealing, while wax oil is less common； White oil is used for isolation or cushioning; options 52 or 53 apply. Does this pump have double sealing, and is it a high-temperature oil pump? Oil mist lubrication is a lubrication system for machine pump bearings, and it represents a modern technology developed in recent years
White oil is used to cool the mechanical seal, while oil mist lubrication serves as the lubrication system for the bearings of mechanical pumps
The injection point for the sealing oil made from paraffin oil is at the dynamic and static sealing surfaces of the set located near the impeller in the tandem seal; its functions are sealing, cooling, and lubrication. The injection point for the oil mist lubrication system is at the bearing housing. It serves to lubricate the bearings; the white oil is injected at the sealing point located on the atmospheric side of the series-mounted seal, where it functions to provide sealing, cooling, and lubrication
This explanation is very detailed, thank you!
I’ve learned it! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Light diesel is used as the sealing oil; when the temperature of the medium pumped by the pump is too high, it tends to vaporize, resulting in pump cavitation. Our hot oil pumps all use light paraffin as the sealing oil
Paraffin oil is used for the primary seal (usually the F port), while mineral oil is used for the secondary seal (usually BI for the inlet and BO for the outlet); oil mist lubrication is employed for the bearings
Can a dry gas seal be used in a hot oil pump?