53. Please briefly describe the definition of a dry gas seal.
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53. Please briefly describe the definition of a dry gas seal.
The dry gas seal creates an air film formed by neutral, high-pressure isolation gas, which completely blocks the leakage paths for the relatively low-pressure sealing medium, thereby achieving zero leakage or zero spillage of the sealing medium.
Take the turbine dry gas seal as an example; it consists of three components: pre-seal gas (to isolate the lubricating oil), isolation gas (to separate the rich gas), and main seal gas (which takes over the sealing function if one of the seals on either side fails). Therefore, the dry gas seal can provide a more effective sealing effect