How mechanical seals work! What are the technical requirements1

How Mechanical Seals Work

21/04/16 16:18:04

The role of the mechanical seal is to better solve the problem that the medium will leak through the gap, so as not to have a certain impact on the use of the equipment, but many users do not understand the working principle of the equipment, so they cannot use it reasonably, so the next It will be introduced in detail.

The working principle of the mechanical seal: it is a shaft seal device that relies on a pair or several pairs of end faces that are perpendicular to the shaft to slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and is equipped with auxiliary seals to achieve leakage prevention. .

The commonly used mechanical seal structure is composed of stationary ring (static ring), rotating ring (moving ring), spring seat of elastic element, set screw, auxiliary sealing ring of rotating ring and auxiliary sealing ring of stationary ring, etc. The anti-rotation pin is fixed on the gland to prevent the stationary ring from rotating.

Rotating rings and stationary rings are often also called compensation rings or non-compensation rings according to whether they have axial compensation capabilities.

Such as centrifugal pumps, centrifuges, reactors, compressors and other equipment, because the transmission shaft runs through the inside and outside of the equipment, so there is a circular gap between the shaft and the equipment, and the medium in the equipment leaks outward through this gap. If the internal pressure of the equipment Below the atmospheric pressure, the air leaks into the equipment, so there must be a shaft seal device to prevent leakage.

The mechanical seal is a shaft sealing device that prevents leakage. It is to avoid this kind of problem. The above-mentioned working principle has been introduced in detail, which can facilitate users to use it better.