German Ringfeder seals Ringfeder models Ringfeder prices

Ringfeder seals are the customary term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid substance in transmission systems, and also refers to general liquid substances), isolating the parts requiring lubrication in the transmission components from the output parts to prevent lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber; the term oil seal generally refers to this type of tc cased oil seal.

Ringfeder seal principle

Due to the oil film controlled by the oil seal lip between the oil seal and the shaft, this oil film has fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes the end in contact with air to form a meniscus, preventing the leakage of the working medium and thus achieving sealing of the rotating shaft. The sealing capability of the oil seal depends on the thickness of the oil film on the sealing surface; if the thickness is too great, the oil seal will leak; if the thickness is too small, dry friction may occur, causing wear on the oil seal and shaft; if there is no oil film between the sealing lip and the shaft, it is easy to cause heating and wear. Therefore, during installation, some oil must be applied to the sealing ring, and it must be ensured that the cased oil seal is perpendicular to the shaft axis; if not perpendicular, the sealing lip of the oil seal will drain the lubricating oil from the shaft, leading to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant to seep out from the housing to achieve the state of forming an oil film at the sealing surface.

Ringfeder seal applications

Cased oil seals are widely used in aviation, automotive, motorcycle, railway, vehicle, ship, home appliance, and construction machinery industries. They are suitable for sealing rotating and reciprocating motions. Installed in various heavy-duty engines, gearboxes, axles, ships, cylinders, and other parts. Mainly prevents the penetration of sealed media (gas, liquid) and the entry of external foreign matter into the body. Precautions: The pressure bearing range of ordinary oil seals is very limited, generally 0.03 MPa. This pressure is generally formed by the height difference of the lubricating oil itself. If higher pressure sealing is required, high-pressure oil seals (generally capable of withstanding up to 1 MPa pressure) or other sealing forms should be selected.

Ringfeder seal installation and shutdown

1) Before starting, keep the seal chamber filled with liquid. When transporting solidified media, use steam to heat the seal chamber to melt the media. Manual cranking must be performed before starting to prevent sudden startup from causing fracture of the soft ring. 2) For mechanical seals using an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. 3) After stopping a hot oil pump, do not immediately stop the cooling water for the seal oil chamber and face seal; wait until the oil temperature at the face seal drops below 80 degrees before stopping the cooling water to avoid damaging the seal parts.

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