German druschke seals druschke models druschke prices

druschke 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 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, due to the limited elastic force of rubber bellows, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mech seals".

druschke 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 sections such as the bottom, waist, cutting edge, and sealing lip. Typically, in its free state, the inner diameter of a skeleton oil seal is smaller than the shaft diameter, meaning it has a certain amount of "interference fit." Therefore, after the oil seal is installed in the seal housing and on the shaft, the pressure from the seal's cutting edge and the contraction force of the self-tightening helical spring exert a certain radial tightening 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.

druschke seal usage guidelines

1) When the gearbox lubricating oil volume is ≤7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals not in immediate use should be stored properly to prevent contamination by oil, 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 and fail to seal oil, the displacement method can be used for compensation.

druschke seal precautions

1) Shaft speed: Due to design and structural reasons, high-speed shafts should use high-speed oil seals, and low-speed shafts should use low-speed oil seals. Low-speed oil seals must not be used on high-speed shafts, and vice versa. 2) Ambient temperature: In cases of higher operating temperatures, polyacrylate or silicone, fluorine, or silicone-fluorine rubber should be selected. Measures should be taken to reduce the oil temperature in the tank. In cases of lower operating temperatures, cold-resistant rubber should be selected. (3) Pressure: General oil seals have poor pressure resistance; excessive pressure will cause the oil seal to deform. Under conditions of excessive pressure, pressure-resistant support rings or reinforced pressure-resistant oil seals should be used. 4) Installation eccentricity: If the eccentricity between the oil seal and the shaft is too large during mating, sealing performance will deteriorate, which is particularly severe at high shaft speeds. If the eccentricity is too large, oil seals with a "W" shaped cross-section can be used. 5) Shaft surface finish directly affects the service life of the oil seal; i.e., higher shaft smoothness results in longer oil seal service life. 6) Ensure there is a certain amount of lubricating oil on the oil seal lip. 7) Pay special attention to preventing dust from entering the oil seal.

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