![]() Google Patents Labyrinth seal with contaminant purging passageway for bearing housingsĭownload PDF Info Publication number US5904356A US5904356A US08/927,275 US92727597A US5904356A US 5904356 A US5904356 A US 5904356A US 92727597 A US92727597 A US 92727597A US 5904356 A US5904356 A US 5904356A Authority US United States Prior art keywords labyrinth piston rings grease seal annular member Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5904356A - Labyrinth seal with contaminant purging passageway for bearing housings Ready to identify the perfect parts for your applications? Contact us about your bearing needs today.US5904356A - Labyrinth seal with contaminant purging passageway for bearing housings At Ritbearing, our experts can work with you to determine which bearings and bearing seals offer the best, most cost-effective solution for your application, environment, and end product. While seal selection plays a key role in the success of your bearings, you don’t have to make that decision alone. Each element can not only affect which type of bearing is right for your application, it can also affect material needs and other details as well. ![]() There are a variety of factors that can impact your bearing seal selection, such as max temperatures, necessary lubricants, physical space, and more. Identify the Right Seals for Your Bearings As such you’ll need to weigh the added benefits of these parts to determine if they make long-term sense for your situation. The second is that this same complexity can cause labyrinth seals to be more expensive than other sealing options. The first is that the complexity of the design may require more physical space than other seals, which can be difficult to manage depending on your application. While labyrinth seals offer the best of both contact and non-contact seals, there are some potential downsides. As such, labyrinth seals offer the sealing capabilities of a contact seal while limiting added friction like a non-contact seal. In addition, it can fend off contaminants and prevent leakage without contact the inner ring. The complexity of a labyrinth seal allows it to provide excellent sealing capabilities. ![]() The two pieces interlock and create a thin, grooved path that is long and difficult for substances to escape or penetrate the bearing. Labyrinth seals are composed of multiple pieces – one that remains stationary and another the rotates with the system. The idea of a labyrinth seal is to prevent leakage and contamination by creating a difficult path for both substances to follow. Labyrinth SealsĪ labyrinth seal is a type of bearing isolator that combines elements of contact and non-contact seals in a single component. ![]() However, the lack of contact with the inner bearing produces less friction, which can prevent overheating and other potential issues. This design provides protection against contaminants and leakage, but not to the same degree as a contact seal. While non-contact bearings do not touch the inner ring, they do feature a thin lip that rests adjacent to it. The main difference between the two is that non-contact seals are fixed to the outer ring and do not apply pressure to the inner ring of your bearing. Like contact seals, non-contact seals typically Buna-N and nitrile rubber parts bonded to a steel insert. Addition friction can also reduce the maximum speed of the bearing, so you’ll need to weigh your need for top-end sealing performance with the potential for wear and tear and loss of top speed. Added friction and heat can damage both the bearing and the seal and lead to premature part failure. The trade-off for premium sealing performance is that contact with the inner bearing produces both friction and heat. Contact seals also do an excellent job of sealing lubricants inside your bearing. This seal is designed to apply continuous pressure on a bearing’s inner ring, which creates the contact found in the seal’s name.īy providing direct contact with the inner ring, contact seals make it extremely difficult for contaminants like dust, dirt, and moisture to reach the inner parts of your bearing. Contact SealsĪ contact seal, also known as a lip seal, is a rubber part (typically Buna-N and nitrile) bonded to a steel insert. Let’s break down the different types of seals available for your bearing products. Both roles can help extend the life of your bearings, but it’s crucial to find the right seals for your parts. Bearing seals actively do double duty, preventing contaminants from reaching the inside of your parts while keeping lubricants from leaking out. Tags: seals, bearing lubrication, contact seals, non-contact seals, bearing isolators, labrynth sealsĪ good bearing seal plays a key role for many bearings.
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