What is a mechanical seal?

Mechanical seal means that at least one pair of end faces perpendicular to the axis of rotation are kept against contact and slide relative to each other under the action of fluid pressure and elastic force (or magnetic force) of the compensation mechanism and auxiliary seal to prevent fluid leakage. Device. The elastic loading mechanism and auxiliary seal are mechanical seals of metallic corrugated tubes. We call them metal bellows seals. Among the light-weight seals, there are rubber bellows used as auxiliary seals. The rubber bellows has limited elasticity, and generally needs to be supplemented with springs to meet the loading elasticity. "Mechanical seal" is often referred to simply as "mechanical seal".

Mechanical seal is the most important shaft sealing method in centrifugal pump, reaction kettle, agitator and other equipment. The mechanical seal is also called the end face seal, which is defined in the relevant national standards as follows: "At least a pair of end faces perpendicular to the axis of rotation are maintained by the fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the auxiliary seal. A device designed to prevent fluid leakage by sliding relatively. "

Mechanical seal is a shaft sealing device of rotating machinery. Such as centrifugal pumps, centrifuges, reactors and compressors. Since the transmission shaft runs through the inside and outside of the device, there is a circumferential gap between the shaft and the device, and the medium in the device leaks out through the gap. If the pressure in the device is lower than atmospheric pressure, the air leaks into the device, so there must be a Shaft sealing device to prevent leakage. There are many types of shaft seals. Because mechanical seals have the advantages of low leakage and long life, mechanical seals are the most important shaft sealing method in these equipments in the world.