Design of high-speed mechanical seal2

When designing a mechanical seal, a thorough investigation must first be carried out to obtain the design conditions and the required parameters: 

1. The type of the host and the parts that need to be sealed. 

2. Working conditions. That is, medium pressure, medium temperature and shaft speed. The name, composition and properties of the medium to be sealed. Including density, viscosity, vaporization pressure, corrosiveness, suspended particles, etc. 

3. The allowable limit value of leakage. 

4. Shaft vibration and deflection. 

5. The structure of the sealing part. Including the size of (shaft or bushing), the structure of the sealing cavity, the inner diameter and depth of the sealing cavity, the assembly size of the sealing gland and the roughness of each surface. 

6. Auxiliary system situation. The temperature of the cooling water, whether there are conditions for taking flushing and cooling measures, whether there is a filter device, etc. 

Working parameters, performance indicators: 

Sealed medium: acrylic, liquefied gas  

Leakage: 10mm/h 

Media pressure: 0.10MPa  

Service life: more than one year 

Rotation: 7800r/min 

Temperature: normal temperature