Germany dichtungstechnik bremen seals dichtungstechnik bremen models dichtungstechnik bremen prices

dichtungstechnik bremen seals utilize the "container" concept from transportation to create cartridge seals. The rotating and stationary parts of this seal are pre-assembled into a single unit before installation. After passing inspection and pressure testing, the unit is mounted on the shaft within the stuffing box, fixed to the shaft with set screws, and the gland bolts are tightened. Once the cartridge positioning tabs are removed, the mechanical seal operates with parallel faces and is ready for service. This approach not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all designed as cartridge seals, possessing the aforementioned advantages. Cassette seals are also a type of cartridge mechanical seal. In this seal, the stationary ring, rotating ring, sleeve, gland, and auxiliary seals are all assembled together on a single sleeve before installation, facilitating inspection of assembly quality. After passing inspection, simply tighten the seal cover and secure the screws. These pre-assembled, inspected, and tested seal components make it easier to ensure installation and assembly quality.

dichtungstechnik bremen seal principles

An oil film controlled by the oil seal lip exists between the oil seal and the shaft, and 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 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, overheating and wear are likely. Therefore, during installation, some oil must be applied to the sealing ring, and the skeleton oil seal must be kept perpendicular to the shaft centerline. If not perpendicular, the sealing lip of the oil seal will wipe the lubricating oil off the shaft, 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 form an oil film at the sealing surface.

dichtungstechnik bremen seal functions

The function of a skeleton oil seal is generally to isolate components requiring lubrication in 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 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 locations. 1) Prevent sand, dust, water vapor, etc., from entering bearings from the outside; 2) Restrict lubricating oil from leaking out of bearings. Requirements for oil seals include dimensions (inner diameter, outer diameter, and thickness) that comply with regulations; appropriate elasticity to properly grip the shaft and provide sealing; heat resistance, wear resistance, good strength, resistance to media (oil or water, etc.), and long service life.

dichtungstechnik bremen 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, select polyacrylate, silicone, fluorine, or silicone-fluorine rubber. Measures should be taken to reduce the oil temperature in the tank. In cases of lower operating temperatures, select cold-resistant rubber. (3) Pressure: General oil seals have poor pressure resistance, and excessive pressure will cause deformation. Under conditions of excessive pressure, use pressure-resistant support rings or reinforced pressure-resistant oil seals. 4) Installation eccentricity: If the eccentricity between the oil seal and the shaft is too large, sealing performance will deteriorate, especially at high shaft speeds. If eccentricity is excessive, an oil seal with a "W" cross-section can be used. 5) Shaft surface finish directly affects the service life of the oil seal; i.e., higher shaft surface finish results in longer oil seal service life. 6) Ensure there is a certain amount of lubricating oil on the lip of the oil seal. 7) Pay special attention to preventing dust from entering the oil seal.

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