| 词条 | Conveyor chain |
| 释义 |
A conveyor chain is chain that has been designed specifically for chain conveyor systems. It consists of a series of journal bearings that are held together by constraining link plates. Each bearing consists of a pin and a bush on which the chain roller revolves.[2] Types1. Hollow bearing pin chainHollow bearing pin chain allows attachments to be bolted through the hollow bearing pins. Attachments may be tightly fixed or held in a 'free' manner. 2. Solid bearing pin chainSolid bearing pin chain has the same dimensions as hollow bearing pin chain but is more robust and thus suitable for more arduous conveyor applications. 3. Deep link chainDeep link chain has deeper side plates than the normal chain plates and so provides a continuous carrying edge above the roller periphery. Deep link chain comes in solid and hollow bearing pin varieties. {{anchor|scraper}}4. Drop forged chainDrop forged chain (also known as en-masse conveyor chain or scraper chain) is already fitted with attachments that have been welded directly onto the chain links.[3] PitchEach type of conveyor chain is available in a range of different pitches. The minimum pitch is dictated by the need for adequate wheel tooth strength and the maximum is determined by plate rigidity. The maximum pitch can be exceeded if the chain is strengthened with bushes between the link plates and there is still enough clearance with the wheel teeth. AttachmentsAttachments are fitted to a conveyor chain to adapt it for a particular conveying application. Conveyor chain attachments are typically made from steel but scrapers made from multi-laminated beech are becoming increasingly common, especially in the cement, biomass and recycling industries.[4] Conveyor sprocketsSprockets are used in the conveyor system to drive the chain. Conveyor sprockets typically have an odd number of teeth although sprockets with an even number have become more prevalent over the last thirty years. Most sprockets are made from fabricated steel and are parallel or taper keyed to a through shaft. Conveyor sprockets are also available in double pitch and shear pin varieties. Double pitch sprockets wear evenly and offer a longer service life than standard sprockets. Shear pin sprockets break when overloaded, stopping the conveyor and saving considerable expense and downtime.[5] LubricationIn order for a conveyor chain to perform well, the bearing surfaces must be lubricated. Correct lubrication will minimise power absorption, wear rate, corrosion and noise. In normal conditions and operating temperatures a quality mineral oil with medium viscosity e.g. SAE 20W50 will suffice.[6] Self-lubricating chains that require no additional lubrication are available from a variety of chain manufacturers as well. International standardsConveyor chain can be manufactured to a number of different standards. 1. British StandardThe British Standard chain designed to meet the requirements of the British market as well as those where British engineering design and purchasing dominates. 2. International Organisation for StandardisationThe International Organisation for Standardisation is used throughout the European market except in Germany which has its own standard. 3. Deutsche Institut für NormungThis standard is the dominant standard in Germany and is not interchangeable with the BS and ISO standards. UsesConveyor chains are used in
References1. ^http://tsubakimoto.com/pdf/product/e_lconveyorchain.pdf{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 2. ^http://www.renold.com/Products/ConveyorChain/ConveyorChain.asp?menuID=46 3. ^http://www.conveyorchain.co.uk/drop-forged/sizes.html{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 4. ^http://www.mqworld.com/article.php?id=11575{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 5. ^http://www.conveyorchain.co.uk/sprockets/how-to-extend-conveyor-chain-sprocket-and-chain-wear-life.html{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 6. ^http://conveyorchain.co.uk/conveyor-chain/conveyor-chain-lubrication-guide Bibliography
External links{{commons category|Chain conveyors}}
1 : Bulk material handling |
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