Compressor sealing type

The most commonly used is the labyrinth seal. In industrial compressors, common sealing types include labyrinth seals, floating ring oil film seals, mechanical contact seals, and dry gas seals. Since the rotor and stator of the compressor rotate at high speed while the other remains stationary, there must be a certain gap between them; as a result, gas will inevitably leak from one part of the machine to another. It will also leak outside the machine. To reduce or prevent these gas leaks, sealing devices are required. The seal that prevents leakage between the various cavities within the flow passages of a machine is called an internal seal. The seal that prevents or reduces gas leakage from the machine to the outside environment, or from the outside environment into the machine (when the gas pressure inside the machine is lower than the external pressure), is called an external seal, or shaft end seal. Internal seals, such as those on the wheel covers, spacers, and balance discs, are generally of the labyrinth type. For external sealing, if the compressed gas is non-toxic and harmless such as air, and a small amount of gas leakage is acceptable, a labyrinth seal can also be used. If the compressed gas is toxic or flammable and explosive, such as ammonia, methane, propane, liquefied petroleum gas, hydrogen, etc., it is not allowed to leak outside the machine; mechanical seals such as liquid seals, mechanical contact seals, vacuum seals, or air seals must be used. With the application and development of mechanical seals, it is necessary to introduce a new classification for them. Based on whether there is an external fluid between the friction pairs of the sealed end faces, mechanical seals can be divided into dry seals (DGS) and wet seals (WS). This post was last edited by Si Shi Bu Huo on 2008-1-13 at 14:41.]