Germany p+s seals p+s model p+s price

p+s seals are a typical representative of oil seals; the term "oil seal" generally refers to skeleton oil seals. The function of an oil seal is generally to isolate components requiring lubrication in transmission parts from the external environment, preventing lubricating oil leakage. The skeleton acts like reinforcing steel in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. According to 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 a dust-proof function, preventing external dust, impurities, etc., from entering the machine interior. According to skeleton type, they can be divided into inner-covered skeleton oil seals, exposed skeleton oil seals, and assembled oil seals. According to 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.

p+s seal principle

Since there is an oil film controlled by the oil seal lip edge 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 it to form a meniscus at the end where it contacts the air, preventing leakage of the working medium and thereby 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 axis; if not perpendicular, the sealing lip of the oil seal will wipe the lubricating oil off the shaft, which will also lead 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.

p+s seal function

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 enabling the oil seal to maintain its shape and tension. According to 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, mud, dust, water vapor, etc., from invading the bearing from the outside; 2) Restrict lubricating oil in the bearing from leaking out. Requirements for oil seals include that dimensions (inner diameter, outer diameter, and thickness) must comply with regulations; appropriate elasticity is required to properly grip the shaft and achieve a sealing effect; heat resistance, wear resistance, good strength, media resistance (to oil or water, etc.), and long service life are required.

p+s 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 in reciprocating motion. Standard oil seals are used in environments with relatively little dust and impurities, resistant to media pressure<0.05MPa occasions, maximum linear speed 15m/s, reciprocating motion speed<0.1m/s. 2) Standard double-lip type: In addition to the usage characteristics of the aforementioned 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 occasions, linear speed ≤15m/s. 3) Springless type: Single-lip inner-covered skeleton rubber oil seal without a spring. Generally suitable for low-speed operating 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 relatively little dust and impurities, resistant to media pressure<0.05MPa occasions. For cases where the rotating shaft linear speed is ≤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 occasions. 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 operating conditions under high temperature and high speed, media pressure ≤0.05MPa, maximum linear speed ≤15m/s. 7) Unidirectional return flow type right-hand rotation, left-hand rotation: Angled diagonal ribs are manufactured on the air side of the lip, utilizing hydrodynamic principles to generate a unidirectional pumping action with a return flow effect. Related to the direction of shaft rotation, 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 occasions, rotational speed ≤20m/s. 8) Pressure-resistant type: Short lip, short and thick waist, providing pressure resistance, working pressure ≤3MPa. Suitable for occasions where media pressure is ≤3MPa, suitable for shaft end oil seals of high-pressure pumps, generally the PV value is ≤8. Rotating shaft linear speed ≤15m/s.

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