German schloesser seals schloesser models schloesser prices

schloesser seals can be divided into two major categories: static seals and dynamic seals. Static seals mainly include three types: gasket seals, sealant seals, and direct contact seals. According to working pressure, static seals can be further divided into medium- and low-pressure static seals and high-pressure static seals. Medium- and low-pressure static seals commonly use gasket seals made of softer materials with wider widths, while high-pressure static seals use metal gaskets made of harder materials with very narrow contact widths. Dynamic seals can be divided into two basic types: rotary seals and reciprocating seals. Additionally, depending on whether the seal contacts the components moving relative to it, they can be classified as contact seals and non-contact seals; according to the seal and contact position, they can be divided into circumferential seals and face seals, with face seals also known as mechanical seals. Centrifugal seals and spiral seals in dynamic seals achieve sealing by imparting power to the medium during machine operation, hence they are sometimes referred to as power seals.

schloesser seal principles

Due to the oil film controlled by the oil seal lip 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 of the oil film in contact with air to form a meniscus, preventing leakage of the working medium and thus 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 centerline; if not perpendicular, the sealing lip of the oil seal will drain the lubricating oil from 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 achieve the state of forming an oil film at the sealing surface.

schloesser seal functions

The function of a skeleton oil seal is generally to isolate the components requiring lubrication in the transmission parts 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 reinforcement bars in concrete components, providing strengthening and allowing the oil seal to maintain its shape and tension. According to the skeleton type, it can be divided into inner skeleton oil seals, outer skeleton oil seals, and exposed inner and outer skeleton oil seals. Skeleton oil seals are made of 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 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, resistance to media (oil or water, etc.), and long service life.

schloesser seal specifications and applications

1) Standard single-lip type: Generally used for sealing mineral oil, water, and other media on high and low-speed rotating shafts and reciprocating motions. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure<0.05MPa conditions, maximum linear speed 15m/s, reciprocating motion speed<0.1m/s. 2) Standard double-lip type: In addition to the usage characteristics of the above-mentioned S type oil seals, it also provides dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure<0.05MPa conditions, linear speed ≤15m/s. 3) Springless type: Single-lip inner-skeleton rubber oil seal without a spring. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤6m/s. 4) Outer skeleton single-lip type: Single-lip exposed-skeleton rubber oil seal with a spring, featuring a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure<0.05MPa conditions. Cases where the rotating shaft linear speed ≤15m/s. 5) Outer skeleton double-lip type: Double-lip exposed-skeleton rubber oil seal with a secondary lip, featuring a thin waist, good followability, high rigidity, and good coaxiality. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure<0.05MPa conditions. Rotational speed ≤15m/s. 6) Assembled single-lip type: Outer skeleton oil seal formed by assembling inner and outer skeletons with rolled edges, featuring high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, media pressure ≤0.05MPa, maximum linear speed ≤15m/s. 7) Unidirectional return flow type right-hand/left-hand rotation: Angled diagonal ribs are manufactured on the air side of the lip, utilizing hydrodynamic principles to produce a unidirectional pumping action with a return flow effect. Related to the rotation direction of the shaft, due to the return flow effect, the radial force is smaller than that of standard oil seals, reducing wear and heat generation, improving service life, suitable for media pressure<0.05MPa conditions, rotational speed ≤20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance, working pressure ≤3MPa. Suitable for conditions with media pressure ≤3MPa, suitable for shaft end oil seals of high-pressure pumps, generally PV value ≤8. Rotating shaft linear speed ≤15m/s.

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