English (UK) 
简体中文 刚入行的新手如何快速搞定Double sprocket drum line selection？这问题是不是让你头大？别慌！今天咱们就掰开揉碎了说透这三个核心：How do you calculate the load?, andHow to choose the material, andHow to choose the transmission method. After reading this, you'll be able to avoid at least the 80% pit!
Firstly, what the hell is a double chain drum line?
Simply put, it relies onTwo chains.A conveyor line that simultaneously tugs on the rollers to turn them. Why use a double chain? Because it's more efficient than a single chain.pep, andMore stable passes, especially good for pulling heavy loads, running long routes or turning corners. For example, you commonly see the kind of logistics warehouse rumbling running pallets of iron lump, most likely it is.
Secondly, load parameters: don't just look at the surface numbers!
The most common problem for newbies is "This drum is labelled as capable of holding 100kg, but why is it deformed in just two months?" Come on! Focus on these three items:
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Single Roll Load vs Line Load
- Single roll load: meansSingle rollerWeight that can be carried (e.g. 500kg)
- Whole line load: dependsweakest link! For example, if the chain can't carry it, it's no good if the rollers are strong.
Let's take a chestnut: you have 1 tonne of cargo, and you use 10 rollers, each marked 200kg - seems to be enough? But the chain only carries a maximum of 800kg, and it collapses as usual!
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Cargo size determines roller spacing
- Key formula.Roller spacing ≤ 1/3 cargo length(Ensure that at least 3 rollers are holding the load at the same time)
- Exclusive pit for double sprockets: the pitch still has to be metT = n x p/2(n is an integer, p is the chain pitch)! Otherwise the chain will get stuck halfway.
| Chain Model | Pitch (mm) | Recommended Pitch (mm) | Chain Type
|—|—|—|
| 08B chain | 12.7 | 75/100/150 |
| 10A chain | 15.875 | 100/150/200 |
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The bottom surface of the goods must be flat!
Softcover, mesh box, irregular bottom? Change the conveyor before it's too late! Otherwise the rollers wear bald in minutes.
Third, the choice of material: cheap ≠ save money!
Choosing material is not choosing cabbage, you have to lookmatrixrespond in singing(manufacturing, production etc) costsGaming:
| Material Type | Applicable Scenarios | Achilles' heel |
|---|---|---|
| Carbon steel galvanised | General warehouses, dry environments (king of the price/performance ratio) | Rusts when wet, poor wear resistance |
| stainless steels | Cold storage, seafood factories, chemical plants (corrosion-resistant bearer) | Double the price! Don't use plastic parts at low temperatures |
| Plastic (PA66) | Food factory, electronic workshop (low noise, anti-static) | Don't touch for heavy loads! Up to 150kg |
To say a true story: a factory to cheap in the freezer with ordinary galvanised roller, the results of minus 15 ℃ bearing frozen fried - for stainless steel expensive, but repair a loss of production downtime more painful!
IV. Transmission mode: "Matchmaking guide" for sprockets and chains
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Single sprocket large cycle vs double sprocket small cycle
- great circle (in spherical geometry): One chain for all drums - suitable forlong distance straight line(over 10 metres)
- mini-cycle: Chain interlocking drive - specialised in the treatment ofTurns, short distances(within 6 metres)
Point of emphasis: hard on the big loop on the corner line? Wait for the chain to collapse and fly!
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Chain selection: 08B or 10A?
- 08B ChainCheap and lightweight, but limited to 100kg/m, up to 6 metres.
- 10A ChainExpensive, but easy to build! Load 300kg/m, capable of pulling 8 metres.
As a rule of thumb: conveyor line more than 5 metres, directly on the 10A, to save the later reinforcement spend money.
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The motor position hides the mystery
- With a double chain driveMotor mounted centreIt's 20% less power loss than putting it on both ends! Don't ask why, just do it.
Question and answer time
Q: Is choosing a double sprocket superior to a single sprocket?
A.Re!Single sprockets are cheap and good for maintenance, light loads straight line with single chain is more fragrant; double chain is expensive and troublesome to install, but irreplaceable for heavy loads/turns.
Q: Is the "silent" plastic sprocket a gimmick?
A.Really fragrant!Measured 30 m / min speed, carbon steel sprocket noise over 85 dB, plastic steel can be pressed to below 70 - but the workshop oil stained don't use, slipping to you doubt life!
Q: Can I trust the seller when he says "all stainless steel drum"?
A.Be wary of word games!The real 304 stainless steel even the core is steel, and some "stainless steel" is just the barrel chrome plating - salt spray test a test will reveal.
One last shot.
Selection is not a dictionary, don't stick to the parameters! You have to figure it out first.How much does it weigh? Where is it going? How harsh is the environment?If you get these three right, then tick the boxes on the form. If you're not sure - a barbecue with someone who knows what they're doing will do you more good than three days in the workshop.
