Dynamic sealing knowledge
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Please give me some pointers: What is the sealing form of the high-pressure pump outlet? What is a labyrinth seal and what is a comb seal? Thanks!
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There are many tortuous chambers between the rotating parts and the fixed parts, and the fluid generates turbulence in the middle to form a seal.
The two basically refer to the same thing. There are three types of labyrinth seals, including straight ones, which are the simplest. There is also a maze of stairs. There is also a maze of tapers.
Labyrinth seal is a type of non-contact seal and is very practical. Many of the machines I use for experiments use labyrinth seals. Compact structure, easy to disassemble and assemble.
For high-pressure pumps, mechanical seals or floating ring seals can be used to ensure the sealing effect. Labyrinth seal, also called comb seal, is a non-contact seal. Mainly used for centrifugal compressor stage inner wheel cover seal, inter-stage seal and balance plate seal. When the pressure is low and a small amount of fluid is allowed to flow out, it can also be used as a shaft seal (seal between the shaft and the housing). The most commonly used structures of labyrinth seals are the following ones:: 1. Smooth shape 2. Zigzag shape 3. Step shape 4. Radially arranged labyrinth seal. Now there is a new type of labyrinth seal.: Honeycomb labyrinth seal. (It may not be appropriate to call this comb-tooth type. )
The type of labyrinth seal has been explained very clearly above. The principle is generally introduced. Gas leaks in through the gaps between the comb teeth to form a vortex. Through many comb teeth, the energy gradually decreases, achieving a sealing effect!