Can dry grinding seal without oil?

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, through which the medium in the equipment leaks out. If the pressure in the equipment is lower than the atmospheric pressure, the air leaks into the equipment, so it is necessary to have a Shaft seal to prevent leakage.u200bu200b

Dry-grinding seal is a kind of mechanical seal, and many problems encountered are: Is it possible to dry-grind seal without oil?u200bu200b

This is about the mechanical seal medium or the mechanical seal ring, where to refuel? If it is a medium, add the specified medium; if it is a sealing ring, when using ethylene-propylene rubber as an auxiliary seal, do not connect it with mineral oil or grease. Other lubricating things such as oil are to reduce friction and install well, and it is not easy to damage the sealing ring. The seals of mechanical parts with high precision requirements must be refueled. The precision is not high, and the requirements are not very strict without refueling, but it should be cleaned frequently.u200bu200b

There are two kinds of sealing of vacuum devices. One is that the sealing part separates a container filled with liquid medium from the external vacuum space. In this case, the main function of the seal is to prevent the liquid medium from leaking into the vacuum space. Another situation is that the seal separates the vacuum inner cavity from the outer cavity, and its function is to maintain the required vacuum degree. This situation is more complicated because even a slight leakage of the surrounding gaseous medium into the vacuum chamber will reduce its vacuum. Vacuum equipment may be damaged if corrosive gas leaks in. In many cases, the degree of vacuum and the cleanliness of the vacuum space have a decisive influence on the quality of various processes carried out under vacuum conditions.