A skeleton oil seal is a type of mechanical seal that is used to prevent the escape of lubricants, oils, and other fluids from a machine or mechanical component.
The frame of a skeleton oil seal is shaped like a thin, circular ring and is designed to fit snugly into a housing or bore in a mechanical component such as an engine, gearbox, or pump. The frame is covered with a flexible, elastomeric material that serves as the actual sealing element. The elastomeric material used in skeleton oil seals is typically made of rubber or silicone. The material is designed to be flexible and able to conform to the shape of the component it is sealing against.
When a skeleton oil seal is installed, it is positioned in the housing or bore so that the sealing element is in contact with the rotating shaft or another component that is rotating inside the housing. As the component rotates, a thin layer of oil or lubricant is created between the shaft and the sealing element. The sealing element then compresses against the rotating component, creating a barrier that prevents oil or other fluids from escaping.
The design of the skeleton oil seal allows for a certain amount of leakage to occur between the sealing element and the rotating component. This is necessary to provide lubrication to the component and prevent excessive wear and tear. However, the amount of leakage must be carefully controlled to prevent too much fluid from escaping and causing damage to the surrounding machinery.
To achieve this, the elastomeric material used in skeleton oil seals is designed to have a certain degree of stiffness or hardness. This allows the sealing element to compress against the rotating component with just the right amount of force, creating a seal that is tight enough to prevent fluid from escaping, but not so tight that it causes excessive wear or generates excessive heat.
The type of skeleton used in the oil seal can affect its performance and suitability for specific applications. There are three main types of skeleton structures for oil seals: inner skeleton oil seals, outer skeleton oil seals, and inner and outer skeleton oil seals.
(1)Inner skeleton oil seals are designed to fit onto a shaft and are typically used to seal rotating components, such as gears or bearings. They consist of a metal frame that is covered with a rubber or elastomeric material, which forms the sealing surface. The metal frame is typically made from steel or stainless steel, and it provides the necessary rigidity and support to the seal.
The inner skeleton oil seal is installed on the shaft by pressing it into the housing bore, which allows the seal to make contact with the rotating component. The metal frame provides the necessary rigidity to the seal, while the rubber or elastomeric material provides the sealing function. Inner skeleton oil seals are commonly used in high-speed applications and can withstand high temperatures and pressures.
(2)Outer skeleton oil seals are designed to fit into a housing bore and are typically used to seal stationary components, such as pumps or motors. They consist of a metal frame that is covered with a rubber or elastomeric material, which forms the sealing surface. The metal frame is typically made from steel or stainless steel and provides the necessary rigidity and support to the seal.
The outer skeleton oil seal is installed in the housing bore and makes contact with the rotating component, creating a tight seal. The metal frame provides the necessary support to the seal, while the rubber or elastomeric material provides the sealing function. Outer skeleton oil seals are commonly used in low-speed applications and can withstand moderate temperatures and pressures.
(3)Inner and outer skeleton oil seals combine the features of both inner and outer skeleton seals, providing a dual sealing function. They are typically used in applications where the shaft and housing require sealing, such as in gearboxes or transmissions. They consist of a metal frame that is covered with a rubber or elastomeric material on both sides, which forms the sealing surfaces.
The inner and outer skeleton oil seal is installed by pressing it onto the shaft and into the housing bore, creating a tight seal between the two components. The metal frame provides the necessary support to the seal, while the rubber or elastomeric material provides the sealing function. Inner and outer skeleton oil seals are commonly used in high-speed applications and can withstand high temperatures and pressures.
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