Gland Rings

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Since the end of World War II, the chronic requirement for power and yet more power has become a problem of international rather than purely national interest. Throughout the world, the increasing tempo of industrialization and the general improvements in living standards have created a situation that can only be countered by bold, far-sighted planning and adventurous engineering. Hence, the now-familiar emphasis on nuclear power stations and hydro-electric schemes. Carbon and its numerous applications in nuclear engineering will no doubt be a subject in some future edition of this publication. This article is concerned with the part carbon-graphitic glands play in the running of that essential Io a nation’s industrial and domestic power needs - the hydro-electric power station.To date, nobody has discovered, produced or invented a material for turbine glands that can better carbon. For this reason, carbon is widely employed in this capacity, except in one or two countries like Italy and the U.S.A. where soft packing glands arc preferred. Carbon glands arc reliable. can be easily fitted in comparison to other types. do not need frequent adjustments. and, very important, do not damage or wear the turbine shaft.

The glands manufactured by Assam Carbon Products Limited are highly-specialized products developed in association and collaboration with prominent turbine constructors throughout the world. They have won for the Company a substantial percentage of the world’s markets for such equipment. So far, glands have been supplied for shaft diameters up to 1170 mm. It is hoped, however. that the Company will shortly embark upon a contract for the largest. Most ambitious hydro-electric scheme in the world, where shafts of 1350 mm diameter will have to be sealed.

Every water turbine installation, big or small, introduces its own peculiarities, its own difficulties and running conditions. This article can do little more than cover the subject in general terms and, in doing so, signpost the broad principles and rulings that dictate which gland materials and gland design are best suited to a specific application.

Applications

Water turbines
The majority of gland rings supplied conform broadly teither one of two patterns – the tenon - type or the wedge - type. Depending upon the vagaries of the particular commitment, rings of the same type may differ in detail amongst themselves, although in an overall sense, they will generally comply with the ensuing descrpitions.

Tenon-Type Rings
This gland consists of a ring composed of a number of carbon segments held together by a peripheral close-coiled tension or garter spring. It earns its name from the method of assembling the carbon segments, each of which is connected to its neighbour by an integral toungue fitting into a recess.

Wedge rings

To overcome as many of these disadvantages as possible, another type of ring has been evolved in whichthe tenons are replaced by wedges. This ring – appropriately designated the wedge-type - has won an immense popularity and is likely to supersede the tenon ring in the majority of installations. Like the tenon-type, this ring is made up of carbon segments, the actual quantity of which will vary from eight to sixteen depending upon the shaft diameter. Instead of having tongues and recesses, the ends of these segmeare chamfered to present sliding surfaces to tapered wedge pieces, one of which is interposed between ends of every pair of neighbouring segments. A garter spring seated in a groove around the outside circumference of the ring holds the assembly of segments and wedges together. Pins rooted in the outer sealing faces of the gland housing and located in slots in segments stop the gland from turning with the shaft.

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Assam Carbon Products Ltd.

Nehru Placenew, Delhi
GST07AACCA4236D1Z6
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Product Description

Since the end of World War II, the chronic requirement for power and yet more power has become a problem of international rather than purely national interest. Throughout the world, the increasing tempo of industrialization and the general improvements in living standards have created a situation that can only be countered by bold, far-sighted planning and adventurous engineering. Hence, the now-familiar emphasis on nuclear power stations and hydro-electric schemes. Carbon and its numerous applications in nuclear engineering will no doubt be a subject in some future edition of this publication. This article is concerned with the part carbon-graphitic glands play in the running of that essential Io a nation's industrial and domestic power needs - the hydro-electric power station.To date, nobody has discovered, produced or invented a material for turbine glands that can better carbon. For this reason, carbon is widely employed in this capacity, except in one or two countries like Italy and the U.S.A. where soft packing glands arc preferred. Carbon glands arc reliable. can be easily fitted in comparison to other types. do not need frequent adjustments. and, very important, do not damage or wear the turbine shaft.

The glands manufactured by Assam Carbon Products Limited are highly-specialized products developed in association and collaboration with prominent turbine constructors throughout the world. They have won for the Company a substantial percentage of the world's markets for such equipment. So far, glands have been supplied for shaft diameters up to 1170 mm. It is hoped, however. that the Company will shortly embark upon a contract for the largest. Most ambitious hydro-electric scheme in the world, where shafts of 1350 mm diameter will have to be sealed.
            
Every water turbine installation, big or small, introduces its own peculiarities, its own difficulties and running conditions. This article can do little more than cover the subject in general terms and, in doing so, signpost the broad principles and rulings that dictate which gland materials and gland design are best suited to a specific application.

Applications

Water turbines
The majority of gland rings supplied conform broadly teither one of two patterns – the tenon - type or the wedge - type. Depending upon the vagaries of the particular commitment, rings of the same type may differ in detail amongst themselves, although in an overall sense, they will generally comply with the ensuing descrpitions.

Tenon-Type Rings
This gland consists of a ring composed of a number of carbon segments held together by a peripheral close-coiled tension or garter spring. It earns its name from the method of assembling the carbon segments, each of which is connected to its neighbour by an integral toungue fitting into a recess.

Wedge rings

To overcome as many of these disadvantages as possible, another type of ring has been evolved in whichthe tenons are replaced by wedges. This ring – appropriately designated the wedge-type - has won an immense popularity and is likely to supersede the tenon ring in the majority of installations.

Like the tenon-type, this ring is made up of carbon segments, the actual quantity of which will vary from eight to sixteen depending upon the shaft diameter. Instead of having tongues and recesses, the ends of these segmeare chamfered to present sliding surfaces to tapered wedge pieces, one of which is interposed between ends of every pair of neighbouring segments. A garter spring seated in a groove around the outside circumference of the ring holds the assembly of segments and wedges together. Pins rooted in the outer sealing faces of the gland housing and located in slots in segments stop the gland from turning with the shaft.


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About the Company

Year of Establishment1963
Legal Status of FirmLimited Company (Ltd./Pvt.Ltd.)
Nature of BusinessManufacturer
Annual TurnoverRs. 25 - 50 Crore
IndiaMART Member SinceAug 2011
GST07AACCA4236D1Z6
Assam carbon was established in 1963 as a metal graphite and copper powder manufacturing unit in Bamunimaidan, Guwahati. Since then company has been at the forefront of carbon brush technology in India. It has collaborated with Morgan Advanced Materials plc (earlier known as The Morgan Crucible plc) in 1970's and 1980’s to adopt the latest carbon technologies for Indian market. In 1992, Assam carbon became a subsidiary of Morgan Advanced Materials plc.
Assam Carbon has two plants with strength of about 350 people. It caters to different industries such as Railways, Mining, Steel, Submersible Pump, Power, Agriculture, Sugar etc. Company has diverse product portfolio for different applications such as Carbon Brush, Current Collectors, Carbon Bearings, Carbon Seals, Felt & Insulations, SIG and other graphite products.
Gland Rings
Gland Rings
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Seller Contact Details

Santanu Sen Gupta

Meghdoot, Nehru Placenew, Nehru Placenew Delhi - 110019, India

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