Mechanical seals are used on several seal designs to detect leakage and control the sealed environment.The types of mechanical seals include single-end mechanical seals, double-end mechanical seals and tandem mechanical seals.
Single-end mechanical seal is the most basic type with simple structure and low manufacturing cost. It is suitable for oil, water, organic solvents and weakly corrosive media.
Double-end mechanical seals are mostly used for flammable, explosive, toxic, particle-containing and poorly lubricating media. They are usually equipped with a sealing auxiliary system, that is, an isolation fluid is introduced into the sealing cavity between the two end faces to improve the lubrication and cooling conditions of the mechanical seal.
Tandem mechanical seals are generally used in high temperature and high pressure situations. They reduce the pressure and temperature of the medium through multi-stage sealing and sealing auxiliary systems to achieve better sealing effects.
When choosing a mechanical seal, you need to consider the following aspects:
1. Working parameters: including pressure, temperature, medium, speed and other factors.
2. Environmental conditions: including working environment temperature, humidity, corrosiveness, etc.
3. Equipment matching: The mechanical seal needs to match the equipment, including shaft diameter, axial clearance, installation method, etc.
4. Reliability requirements: Different working conditions and application requirements have different reliability requirements for mechanical seals.
In addition, there are other ways to classify mechanical seals, such as bellows mechanical seals and spring mechanical seals according to the type of elastic element, pump mechanical seals, valve mechanical seals, etc. according to the application machine, and heavy-duty mechanical seals, light-duty mechanical seals, etc. according to the working shaft diameter. These classifications further refine the application scope and technical characteristics of mechanical seals to meet the needs of different industrial fields.
