Mechanical seal
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How many seals are there in a complete centrifugal pump? Where are they located respectively? What role does each play?
This question is too vague; it needs to be more specific
Look at the drawings more often. . 1. Mouth ring; 2. Area at the pump cover; 3. Mechanical seal. There are also oil seals in the bearing housing. More specifically, there is a dust cover on the bearing pressure plate, and some bearing holders come equipped with dust covers as well. . PS: I also graduated last September; I guess you did the same: lol
Is the poster asking about mechanical seals? Pumps with different structures have varying numbers of mechanical seals; some have 1 set, some have 2 sets, and some have none.
Provide a clear drawing; it’s hard to answer without one
A centrifugal pump (referring to a single-stage, single-suction type) has 3 dynamic sealing points: one is what is commonly referred to as the shaft seal, while the other two are seals for the lubricating oil provided by the bearing caps；
Dynamic sealing points have mechanical sealing surfaces, also known as friction pairs. The static sealing points include the shaft sleeve and shaft, the moving ring and shaft sleeve, and the static ring and sealing gland. Seal the gland and pump cover, as well as the pump cover and pump casing. This is the sealing point of the single-stage centrifugal pump; as for the bearing housing, it’s just the gland
Under normal circumstances, there are two pairs: one pair on the inlet and outlet sides of the impeller, and the other pair is the gasket or mechanical seal at the two bearings.