German deisenhammer seals deisenhammer model deisenhammer price

deisenhammer seals are the customary term for general seals; simply put, they are seals for lubricating oil. 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 assembly 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 seal is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully encapsulated in rubber. Commonly referred to oil seals often refer to this type of tc skeleton oil seal.

deisenhammer seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The seal body is divided into the bottom, waist, cutting edge, and sealing lip according to different parts. Typically, in the free state, the inner diameter of the skeleton oil seal is smaller than the shaft diameter, meaning it has a certain "interference fit." Therefore, after the oil seal is installed on the seal housing and shaft, the pressure of the oil seal cutting edge and the contraction force of the self-tightening helical spring exert 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 compensate for the oil seal's self-tightening force at any time.

deisenhammer seal usage guidelines

1) When the 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 seal oil, the displacement method can be used for compensation.

deisenhammer seal maintenance

1) Control of shaft seal pressure: High shaft seal pressure easily causes steam leakage from the shaft seal, which can lead to water ingress into the oil and 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 the shaft seal temperature is too high, especially before unit startup, excessive heat will cause intense heating at the shaft end steam seal and rotor steam seal section, resulting in local stress concentration and certain deformation. This may change the clearance between the rotor and the cylinder, increase steam leakage from the shaft seal, increase differential expansion, and in severe cases, cause stationary-to-rotating part friction. When the shaft seal temperature is too low, the shaft end steam seal and rotor steam seal section will be cooled, similarly causing local stress concentration, changing the clearance between the cylinder and the rotor, increasing steam leakage at the shaft end, and decreasing differential expansion. When the shaft seal temperature is too low, the steam supplied to the shaft seal may carry water, causing water hammer in the shaft seal steam supply pipe. In severe cases, this leads to water ingress into the turbine.

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