Mechanical seals are one of the precision mechanical basic components with relatively complex structures, serving as critical parts in various equipment such as pumps, reaction reactors, turbine compressors, and submersible motors. Their sealing performance and lifespan depend on numerous factors, including proper selection, machine precision, and correct installation and usage.
One, Selection Method
Mechanical seals come in various types based on working conditions and medium properties, including high-temperature, low-temperature, high-pressure, corrosion-resistant, particle-resistant, and those suited for volatile light hydrocarbon mediums. The appropriate seal structure and material should be selected according to their specific applications.
Key selection parameters include: seal cavity pressure (MPa), fluid temperature (°C), working speed (m/s), fluid characteristics, and the effective installation space for the seal.
What are the basics of mechanical seal knowledge, and the fundamental principles for selection are:
Based on the sealed cavity pressure, determine the type of sealing structure to be used, such as balanced or unbalanced, single or double end face, etc.
2. Determine the use of rotary or stationary, fluid dynamic pressure or non-contact based on work speed.
3. Determine friction pairs and auxiliary sealing materials based on temperature and fluid properties, as well as the correct selection of mechanical seal protection systems such as lubrication, flushing, insulation, and cooling.
