Mechanical seal refers to a seal that prevents fluid leakage by at least a pair of end faces perpendicular to the rotation axis that keep fit and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal. Device.
the elastic loading mechanism and auxiliary seal are mechanical seals of metal bellows, which we call metal bellows seals. In light-duty seals, rubber bellows are also used as auxiliary seals. the rubber bellows have limited elasticity, and generally need to be supplemented by springs to meet the loading elasticity. "Mechanical seal" is often referred to simply as "mechanical seal".
A mechanical seal is a shaft sealing device for rotating machinery. Such as centrifugal pumps, centrifuges, reactors and compressors and other equipment. since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment, and the medium in the equipment leaks out through the gap. If the pressure inside the equipment is lower than the atmospheric pressure, the air leaks into the equipment, so there must be a Shaft seal to prevent leakage. There are many types of shaft seals. Because mechanical seals have the advantages of less leakage and long service life, mechanical seals are the most important shaft sealing methods in these equipment in the world. Mechanical seals, also known as end face seals, are defined in the relevant national standards as follows: "At least one pair of end faces perpendicular to the axis of rotation is maintained under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal. A device for preventing fluid leakage composed of relative sliding