Understanding the basic components of Rotary Joint

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A paper rotary joints or rotary union (also called rotary couplings, rotary swivels) is a tool designed to direct liquid and gases from one point to another, under very high pressure. It provides a mechanical seal between a supply pipe to rotating cylinder or drum. Paper rotary joints are used in several manufacturing processes to heat, cool, or transfer liquid (pneumatic or hydraulic) power. Rotary unions are used in a wide range of equipment; from small rotary unions for semiconductor industry, to large rotary unions for industrial applications.

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slide 1:

A paper rotary joints or rotary union also called rotary couplings rotary swivels is a tool designed to direct liquid and gases from one point to another under very high pressure. It provides a mechanical seal between a supply pipe to rotating cylinder or drum. Paper rotary joints are used in several manufacturing processes to heat cool or transfer liquid pneumatic or hydraulic power. Rotary unions are used in a wide range of equipment from small rotary unions for semiconductor industry to large rotary unions for industrial applications. Rotary unions come in numerous shapes and sizes. Some are designed so that the material passes directly through the rotary union on a single port while others are designed for multiple ports. Many rotary unions come in custom designs. There are four basic components of rotary union: Mechanical seal bearing shaft and housing.

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Mechanical Seal – Mechanical seal is the heart of the rotary Union. The seal prevents the media water air oil etc from leaking outside the rotary joint during its operation. Generally there are four basic types of mechanical seals in rotary unions- 1 pusher-type end face mechanical seal 2 non-pusher type 3 lip seals and 4 o-ring seal. Rotary joints can have more than one seal. Bearing- Second most crucial part of the rotary joint is the bearing. A rotary coupling can have one or more bearings. Roller bearings such as tapered roller bearings and ball bearings or non-roller bearings such as bronze bushings and graphite bearings may be used in rotary joint. Shaft-The shaft is the tool that carries the media through the rotary joint into the drum or roll. In many cases the shaft will revolve with the drum. Housing- The housing is the device that holds all of the other elements of the rotary joint jointly. The housing has a creek port which is a threaded port to which the pipe supplying the media will be attached. The joint may also have an outlet port if the same joint is being used both to supply liquid to a drum and to remove it from the drum. In smaller rotary coupling the housing is motionless and in larger one the housing maybe locked with the drum using a flange. CONTACT US salebaofeng.net.cn Website: http://www.annapurna-baofeng.com/product/rotary-joints.html Mobile:+91-9837923000 Telephone : + 011 43016396 Fax : +011 43016396

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