452050 seals Germany schnorr model 452050 price

452050 seals are sealing devices installed to prevent leakage between the pump shaft and the housing. Common types of shaft seals include packing seals, mechanical seals, and hydrodynamic seals. The shaft seal of a reciprocating pump is usually a packing seal. When conveying media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and hydrodynamic seals. The shaft seal of a reciprocating pump is usually a packing seal. When conveying media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and hydrodynamic seals.

452050 seal principle

Since there is an oil film controlled by the oil seal lip edge 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 thereby 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 skeleton oil seal is perpendicular to the shaft axis. If it is not perpendicular, the sealing lip of the oil seal will wipe the lubricating oil off the shaft, which will also lead to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant in the housing to seep out to achieve the state of forming an oil film at the sealing surface.

452050 seal function

The general function of a skeleton oil seal is to isolate components requiring lubrication in the transmission assembly from the output components, preventing lubricating oil from leaking. It is typically used on rotating shafts and is a type of rotating shaft lip seal. The skeleton acts like reinforcing steel 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, motorcycle crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other parts. 1) Prevent sand, dust, water vapor, etc., from entering the bearing from the outside; 2) Restrict the leakage of lubricating oil from the bearing. Requirements for oil seals include that dimensions (inner diameter, outer diameter, and thickness) must comply with regulations; appropriate elasticity is required to properly grip the shaft and provide a sealing effect; they must be heat-resistant, wear-resistant, have good strength, be resistant to media (oil or water, etc.), and have a long service life.

452050 seal precautions

1) Obtain a fixed quantity of oil seals. 2) From receipt to assembly, the oil seals must be kept clean. 3) Before assembly, inspect the oil seals. Measure whether the dimensions of all parts of the skeleton oil seal match the shaft and housing dimensions. Before installing the skeleton oil seal, clearly compare the shaft diameter with the inner diameter of the oil seal to ensure they match. The internal dimensions of the housing must be suitable for the outer diameter width of the oil seal. Check whether the lip of the skeleton oil seal is damaged or deformed, and whether the spring has fallen off or rusted. Prevent the oil seal from being stored flat during transportation, subjected to external squeezing and impact, which could destroy its roundness. 4) Perform machining inspection procedures before assembly. Measure whether the dimensions of the housing and shaft parts are correct, especially the inner chamfer, which must not have a slope. The end faces of the shaft and housing must be machined smoothly. The chamfer must not have damage or burrs. Clean the assembly area. There must be no burrs, sand, iron chips, or other debris at the shaft insertion area (chamfer), as these can cause irregular damage to the oil seal lip. It is recommended to use an r angle for the chamfer area. 5) Regarding operational technique, you can use your hand to feel whether the surface is smooth and truly round. 6) Do not tear open the packaging paper of the skeleton oil seal too early before installation to prevent debris from adhering to the oil seal surface and being introduced into the work. 7) Before machine installation, apply an appropriate amount of lithium-based grease containing molybdenum disulfide between the lips of the skeleton oil seal to prevent dry grinding against the lip during instantaneous shaft startup, which would affect the lip interference fit. Assembly should be completed as soon as possible. If the oil seal housing with the installed oil seal is not immediately installed in the machine, it is recommended to cover it with a cloth to prevent foreign matter from adhering to the oil seal. Hands or tools applying the lithium-based grease must be clean. 8) The skeleton oil seal must be installed flat, without tilting. It is recommended to use hydraulic equipment or a sleeve tool for installation. The pressure should not be too high, and the speed should be uniform and slow. 9) Mark the machine on which the skeleton oil seal is installed this time to facilitate tracking, and pay close attention to the entire process.

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