German HUECK Rheinische seals, HUECK Rheinische models, HUECK Rheinische prices

HUECK Rheinische seals are typical representatives of oil seals. The term 'oil seal' generally refers to skeleton oil seals. The function of an oil seal is typically to isolate components requiring lubrication within transmission parts from the external environment, preventing lubricating oil leakage. The skeleton acts like rebar in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. Based on 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 shield, preventing external dust, impurities, etc., from entering the machine interior. Based on skeleton type, they can be divided into inner-covered skeleton oil seals, exposed skeleton oil seals, and assembled oil seals. Based on operating conditions, they can be divided into rotary 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.

HUECK Rheinische seal principle

Due to the oil film controlled by the oil seal lip edge between the oil seal and the shaft, this oil film possesses fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes the end contacting air to form a meniscus, 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 thickness is too great, the oil seal will leak; if 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 prone to 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 not perpendicular, the sealing lip of the oil seal will wipe the lubricating oil off the shaft, also 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.

HUECK Rheinische seal function

The function of a skeleton oil seal is generally 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 enabling the oil seal to maintain its shape and tension. Based on skeleton type, they can be divided into inner skeleton oil seals, outer skeleton oil seals, and inner/outer exposed skeleton oil seals. Skeleton oil seals are made from high-quality nitrile rubber and steel plates, offering stable quality and long service life. Widely used in automobiles, motorcycle crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other locations. 1) Prevent sand, dust, water vapor, etc., from invading bearings from the outside; 2) Restrict lubricating oil leakage from bearings. Requirements for oil seals include dimensions (inner diameter, outer diameter, and thickness) complying with regulations; appropriate elasticity to properly grip the shaft and provide sealing; heat resistance, wear resistance, good strength, media resistance (oil or water, etc.), and long service life.

HUECK Rheinische seal maintenance

1) Control of shaft seal pressure: High shaft seal pressure can easily cause steam emission from the shaft seal, prone to water ingress into the oil, leading to deterioration of turbine oil quality. Excessively high shaft seal pressure will trigger the action of the equalizing box safety valve, wasting working fluid and damaging equipment. Too low shaft seal pressure may cause a drop in unit vacuum, allowing cold air to enter the shaft seal or even the cylinder, causing cooling of the shaft seal section or inside the cylinder, seriously threatening equipment safety. 2) Impact of abnormal shaft seal temperature on the unit: When shaft seal temperature is too high, especially before unit startup, excessive heat causes intense heating at the shaft end steam seal and rotor steam seal section, producing local stress concentration, leading to certain deformation, which may change the clearance between the rotor and cylinder, increase steam leakage from the shaft seal, increase differential expansion, and in severe cases, cause stationary-to-rotating part friction. When shaft seal temperature is too low, the shaft end steam seal and rotor steam seal section are cooled, similarly producing local stress concentration, changing the clearance between the cylinder and rotor, increasing steam leakage at the shaft end, and decreasing differential expansion. When shaft seal temperature is too low, the shaft seal supply steam may carry water, causing water hammer in the shaft seal supply pipeline. In severe cases, this leads to water ingress into the turbine.

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