Germany KPA-Kyffhaeuser seals KPA-Kyffhaeuser models KPA-Kyffhaeuser prices

KPA-Kyffhaeuser seals are typical representatives of oil seals; the term "oil seal" generally refers to skeleton oil seals. The function of an oil seal is generally to isolate components requiring lubrication in transmission parts from the external environment, preventing lubricating oil leakage. The skeleton acts like reinforcing steel in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. According to structural form, they can be divided into single-lip skeleton oil seals and double-lip skeleton oil seals. The secondary lip of a double-lip skeleton oil seal serves as a dust seal, preventing external dust, impurities, etc., from entering the machine interior. According to skeleton type, they can be divided into internally enclosed skeleton oil seals, externally exposed skeleton oil seals, and assembled oil seals. According to operating conditions, they can be divided into rotating skeleton oil seals and reciprocating skeleton oil seals. Used for gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, axles, and other locations.

KPA-Kyffhaeuser seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The sealing body is further divided into the bottom, waist, cutting edge, and sealing lip according to different parts. Typically, in the free state, the inner diameter of a skeleton oil seal is smaller than the shaft diameter, meaning it has a certain "interference fit." Therefore, after the oil seal is installed into the seal housing and onto the shaft, the pressure of the oil seal cutting edge and the contraction force of the self-tightening helical spring generate a certain radial clamping force on the shaft. After a period of operation, this pressure will rapidly decrease or even disappear; thus, the spring can continuously compensate for the oil seal's self-tightening force.

KPA-Kyffhaeuser seal usage instructions

1) When gearbox lubricating oil volume is ≤7 liters, the addition amount per liter of lubricating oil is 20‐30ml; 2) 7‐15 liters, the addition amount is 15‐20ml per liter of lubricating oil; 3) >15 liters, the addition amount is 10ml per liter of lubricating oil; 4) Oil seals not in temporary use should be stored properly to prevent contamination with oil stains, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop so that it cannot perform its sealing function, a displacement method can be used for compensation.

KPA-Kyffhaeuser seal precautions

1) Before designing grooves, 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 seals, avoid sharp edges; bore seals installed into integral grooves must use installation tools; designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion clearance; for details, please refer to the product usage instructions, diagrams, and dimension tables. 2) Before installing seals, ensure there are no impurities or cracks in the sealing groove; apply operating oil to both the sealing groove and the seal surface; install seals gradually in sequence; avoid sharp edges during installation, align the seal correctly, and avoid twisting and skewing; if it is a split groove, tighten the pressure cover last.

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