What kind of lubricating oil should be added to a centrifugal pump?
2 Answers
Centrifugal pump bearings are lubricated with LHV-46 lubricating oil or L-HV-32 lubricating oil. Below is the relevant introduction: 1. Principle: Centrifugal pumps work by using the rotation of the impeller to generate centrifugal motion in the water. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started to drive the pump shaft, impeller, and water in high-speed rotational motion, causing the water to undergo centrifugal motion and be thrown to the outer edge of the impeller, flowing into the pump's pressure pipeline through the volute-shaped pump casing. 2. Main function: The main function of the bearing is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotational accuracy.
When it comes to the issue of lubricating centrifugal pumps, as someone who has long tinkered with engines, my experience tells me that oil selection is absolutely critical. Most automotive water pumps use centrifugal pumps, which require multi-grade oil with appropriate viscosity, such as 10W-30 synthetic oil, which is quite reliable. During operation, first clean the oil filler port thoroughly to prevent dust from entering. Add the amount recommended by the manual—too much will cause leaks, and too little will lead to stuttering. Remember to check the oil color every 5,000 kilometers; if it turns black or forms clumps, change it immediately to save on pump replacement costs. I once forgot to add oil, and the bearings wore out, causing the entire engine to overheat and requiring a major repair that cost thousands. I recommend using branded oil and not skimping on cost—extending the pump's lifespan is more important than anything else.
