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What are the main characteristic parameters of mechanical seals?
May 11, 2018

What are the main characteristic parameters of mechanical seals?


What are the characteristics of mechanical seals? What are the parameters of mechanical seals?


  a) Shaft diameter: The shaft diameter of the pump mechanical seal is usually 6-200mm, especially up to 400mm. The shaft diameter of the pump is usually determined by strength determination or the use of shaft sleeve modulation to meet the mechanical seal specification axis. path;

b) speed: usually the same as the pump speed, usually centrifugal pump Jiashan mechanical seal factory speed is less than or equal to 3000r/min; high-speed centrifugal pump is less than or equal to 8000r/min, special pump is less than or equal to 4000r/min;

 c) The uniform circumferential speed of the sealing surface means the circumferential speed of the uniform diameter of the sealing end surface. The uniform linear velocity of the sealing surface, and the wear and tear on the sealing surface (ie, the conflicting pair) of the heat-generating mechanical seals and the wear. Usually the circumferential speed of the unloading and sealing is less than or equal to 30m/s; the circumferential line speed mechanical seal factory using the spring-stopping mechanical seal is less than or equal to 100m/s; in particular it is less than or equal to 150m/s;

 d) Specific pressure of the end face: The end face specific pressure Pc is the contact pressure (MPa) accepted on the sealing surface. The end-to-end seal face pressure should be controlled within a reasonable scale, too small will reduce the sealing performance, over the General Assembly to exacerbate the heat and wear of the seal cover. Pump mechanical seal reasonable end face specific pressure value: built-in mechanical seal, usually take Pc = 0.3-0.6MPa; exterior type, take Pc = 0.15-0.4MPa. When the lubricity is good, the end face specific pressure can be appropriately increased, and the liquid viscosity with larger viscosity increases the end face pressure, it is desirable that Pc = 0.5-0.7 MPa. For liquids with poor volatility and poor lubricity, a smaller end face ratio should be adopted. Pressure, desirable Pc = 0.3-0.45MPa.

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