Germany cleff seals cleff model cleff price

cleff seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation. These faces remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, along with the assistance of auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are sometimes used as auxiliary seals; however, since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mech seals".

cleff seal principle

An oil film controlled by the sealing lip exists between the oil seal and the shaft, possessing fluid lubrication characteristics. Under the effect of liquid surface tension, the stiffness of the oil film causes it to form a meniscus at the interface with air, preventing leakage of the working medium and thereby achieving sealing of the rotating shaft. The sealing capability of an oil seal depends on the thickness of the oil film on the sealing surface. If the film is too thick, the oil seal will leak; if too thin, 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, overheating and wear are likely. Therefore, during installation, some oil must be applied to the sealing ring, and the skeleton oil seal must be kept perpendicular to the shaft axis. If not perpendicular, the sealing lip will wipe the lubricating oil off the shaft, leading to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant to seep from the housing to maintain the formation of an oil film at the sealing surface.

cleff seal function

The general function of a skeleton oil seal is to isolate components requiring lubrication within transmission parts from output components, preventing lubricating oil leakage. It is typically used on rotating shafts and is a type of rotating shaft lip seal. The skeleton acts like rebar in concrete components, providing reinforcement and allowing the oil seal to maintain its shape and tension. Based on the skeleton type, they can be classified as inner skeleton oil seals, outer skeleton oil seals, and exposed inner/outer skeleton oil seals. Skeleton oil seals are made from high-quality nitrile rubber and steel plates, offering stable quality and long service life. They are widely used in automobiles and motorcycles for crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other parts. 1) Prevents sand, dust, water vapor, etc., from entering the bearing from the outside; 2) Restricts the leakage of lubricating oil from the bearing. Requirements for oil seals include dimensions (inner diameter, outer diameter, and thickness) that comply with regulations; appropriate elasticity to properly grip the shaft for sealing; heat resistance, wear resistance, high strength, resistance to media (oil, water, etc.), and long service life.

cleff seal precautions

1) Before designing the groove, please carefully read the product descriptions for each series to distinguish whether the product uses an integral groove or a split groove. During the installation of the seal, avoid sharp edges. Installing a bore seal into an integral groove requires the use of installation tools. Designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion gap. For details, please refer to the product instructions, diagrams, and dimension tables. 2) Before installing the seal, ensure there are no impurities or cracks in the sealing groove. Apply operating oil to both the sealing groove and the seal surface. Install the seals gradually in sequence. Avoid sharp edges during installation, align the seal properly, and prevent twisting or skewing. If using a split groove, tighten the pressure cover last.

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