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Post by John on Feb 8, 2007 14:29:19 GMT -5
Huwood. The TB series TB60,80, 120 etc..
Sutcliffe. I think they went by the name Tiger etc..
Meco-Moore.
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Post by John on Nov 17, 2012 13:38:26 GMT -5
A good article on the Cable Belt that was installed in the Selby complex to haul mineral to the surface. Note the rope splices, 60 metres!!!!! They are some rope splices! I've seen manrider rope spliced to around five metres...... www.saimh.co.za/beltcon/beltcon3/paper322.html |
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Post by John on Nov 17, 2012 13:42:08 GMT -5
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Post by Wheldale on Nov 17, 2012 15:36:16 GMT -5
Interesting article, I remember going on a visit to Wistow. On the way to the face we had to ride on a conveyor. The conveyor was stopped so we could get off, the undermanager told us at the time it was RJB's policy to discipline anyone who stopped a conveyor belt unless a matter of life or death!!
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Post by John on Nov 17, 2012 17:15:25 GMT -5
My first pit had exemptions for manriding the belts, our last belt to pit bottom was a Cable Belt, just a midget at side of Selby's drivehead. Ours was only 300HP.
First thing drilled into us was never grip the Cable Belt by the edges, keep hands and fingers well away from the edge, that rope going over the rollers would burst your fingers!! Nasty bit of work, but saved a hell of a walk up the drift to pit bottom...
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Post by Wheldale on Nov 18, 2012 5:15:55 GMT -5
When was riding of the belts first permitted? 1960's?
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Post by dazbt on Nov 18, 2012 5:34:25 GMT -5
Ah well, here goes .................
It seems to me that the 'Cable Belt Conveyor Article' is a well written piece of sales literature ................ I could be wrong, I usually am, but I don't believe that the Selby North Spine Drift conveyor (related to in the article) was ever installed at a conveying length greater than 9,600m, nowhere near the 14,900m originally intended.
On the other hand …………..
a steel cord belt was installed at the same time in the adjacent South Spine Drift at a conveying length of 12,200m, more than 2.5k longer than the cable belt. This steel cord belt drive was, at that time, the World’s most powerful conveyor having a drive rated at 10,100kw (installed power), and guess who made that baby?
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Post by John on Nov 18, 2012 6:51:01 GMT -5
When was riding of the belts first permitted? 1960's?
There were strict rules that had to be met by the District Inspector before he'd grant permission. |
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Post by John on Nov 18, 2012 6:51:57 GMT -5
Anderson Strathclyde, of course Daz...
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Post by John on Nov 18, 2012 8:43:01 GMT -5
Ah well, here goes ................. It seems to me that the 'Cable Belt Conveyor Article' is a well written piece of sales literature ................ I could be wrong, I usually am, but I don't believe that the Selby North Spine Drift conveyor (related to in the article) was ever installed at a conveying length greater than 9,600m, nowhere near the 14,900m originally intended. On the other hand ………….. a steel cord belt was installed at the same time in the adjacent South Spine Drift at a conveying length of 12,200m, more than 2.5k longer than the cable belt. This steel cord belt drive was, at that time, the World’s most powerful conveyor having a drive rated at 10,100kw (installed power), and guess who made that baby?
It was a pretty large installation never the less. |
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Post by dazbt on Nov 18, 2012 9:00:28 GMT -5
Anderson Strathclyde, of course Daz... and some French peoples of course.  A 72"dia INA roller bearing failed on this drive after quite a few months running which caused a major problem when everybody realised it was unique and there wasn't a replacement anywhere in the world ............. oops !! Investigation of the failure revealed it was down to Variable Frequency Drive induced pitting of the bearing race ............ the "electrical dept." forgot to Earth it ......... duh!! ;D |
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Post by dazbt on Nov 18, 2012 9:06:35 GMT -5
Ah well, here goes ................. It seems to me that the 'Cable Belt Conveyor Article' is a well written piece of sales literature ................ I could be wrong, I usually am, but I don't believe that the Selby North Spine Drift conveyor (related to in the article) was ever installed at a conveying length greater than 9,600m, nowhere near the 14,900m originally intended. On the other hand ………….. a steel cord belt was installed at the same time in the adjacent South Spine Drift at a conveying length of 12,200m, more than 2.5k longer than the cable belt. This steel cord belt drive was, at that time, the World’s most powerful conveyor having a drive rated at 10,100kw (installed power), and guess who made that baby?
It was a pretty large installation never the less.The original proposal was for even longer conveyors in both drifts but 'bad ground' resulted in both intended lengths being considerably shortened. |
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Post by John on Nov 18, 2012 9:50:45 GMT -5
Anderson Strathclyde, of course Daz... and some French peoples of course. A 72"dia INA roller bearing failed on this drive after quite a few months running which caused a major problem when everybody realised it was unique and there wasn't a replacement anywhere in the world ............. oops !! Investigation of the failure revealed it was down to Variable Frequency Drive induced pitting of the bearing race ............ the "electrical dept." forgot to Earth it ......... duh!! ;D
When I worked for Beeston Boiler Company, it was mandatory to take the earth electrode of the welder to the welding site. Before it was always accepted everything was electrically bonded until it was found stray eddy currents were burning out the electronics that controlled the BMD plant and causing bearing failures in the plant mechanicals.
Ironically, none of the night shift fitters knew how to weld or burn, so guess who was elected to carry out those duties.....That's where I learned to arc weld.  |
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Post by dazbt on Nov 18, 2012 10:46:16 GMT -5
and some French peoples of course. A 72"dia INA roller bearing failed on this drive after quite a few months running which caused a major problem when everybody realised it was unique and there wasn't a replacement anywhere in the world ............. oops !! Investigation of the failure revealed it was down to Variable Frequency Drive induced pitting of the bearing race ............ the "electrical dept." forgot to Earth it ......... duh!! ;D
When I worked for Beeston Boiler Company, it was mandatory to take the earth electrode of the welder to the welding site. Before it was always accepted everything was electrically bonded until it was found stray eddy currents were burning out the electronics that controlled the BMD plant and causing bearing failures in the plant mechanicals.
Ironically, none of the night shift fitters knew how to weld or burn, so guess who was elected to carry out those duties.....That's where I learned to arc weld. Taking nothing away from the designers of the Anderson Strathclyde conveyor, some 'pretty smart cookies' put a great deal of thought, know how and hard work into the system R&D, but I do believe that there might have been an element of 'forgot' in the resultant INA failure. The principles behind VFDs creating errosion (or corrosion) to bearings and shafts was well known, the use of grounding rings was also known to be effective in preventing such errosion damage (or so I was informed, after the nightmare episode). |
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Post by John on Nov 18, 2012 12:00:03 GMT -5
Never had any dealings with VFD drives Daz, I was speculating on experience with other things. I don't think VFD's had made a huge impact on the industry up until I left in 1989.
I was under the impression the Selby conveyors were driven by HV DC motors similar to Boulby's No1 and 2 winders. At least that's what the powers that be told me when I was at Boulby.
But back on the subject of bearing failures caused by stray eddy currents, it's a pretty old problem going back many decades, even on 50hz squirrel cage machines.
Not a common problem, but certainly happens from time to time. Just to show even common or garden squirrel cage motors have stray eddy currents, I've seen and measured current flowing through a lifting eyebolt using a clamp on ammeter...
How can it be prevented? Better windings and better iron quality in stator and rotor??? Haven't a clue, just know it happens even in the best designed AC and DC motors.
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tim
Trainee
Posts: 6
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Post by tim on Nov 18, 2012 16:16:40 GMT -5
The South drift housed the Anderson Strathclyde (ASL) steelcord conveyor belt, 12.2 km long, with a lift of 800 metres, a speed of 8.4m/sec, carrying coal at 2,200 tonnes per hour. The total installed weight of the belt was approximately 2,500 tonnes. Coal was delivered onto the ASL via accelerator belts. The South tunnel was driven with the Robbins tunnelling machine, the actual machine was left underground once the tunnelling was completed. In order to drive the drifts, the heavily water bearing strata had to be frozen. The North drift had a Cable Belt and Tandem belt; the Cable Belt was 9,500 metres long, with a lift of 700 metres, carrying approx 2,000 tonnes per hour on its PVL (Preformed for Variable Load) belting. The actual rope length was 38.4 km. The cable belt did get extended but what length this took it too I dont know.
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Post by cortonwood on Nov 18, 2012 16:34:40 GMT -5
I was once on my way home after a shift at Stillingfleet when I got to the junction at gascoigne wood.the police had got the road shut off because they were delivering a roll of belt for one of the drifts,it was massive.
Tim,have you any idea what the lengths of the rolls of new belt were?,I've always wondered after seeing it.
Just one point i have to mention,I was driving past gazzywood one day on my way to the coast with our lass sat at the side of me.She saw the signpost 'Gascoigne wood mine'......with a puzzled look on her face she asked me if they mined wood there!!
you can probably imagine what I called her.
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Post by dazbt on Nov 18, 2012 17:33:59 GMT -5
I was once on my way home after a shift at Stillingfleet when I got to the junction at gascoigne wood.the police had got the road shut off because they were delivering a roll of belt for one of the drifts,it was massive. Tim,have you any idea what the lengths of the rolls of new belt were?,I've always wondered after seeing it. Just one point i have to mention,I was driving past gazzywood one day on my way to the coast with our lass sat at the side of me.She saw the signpost 'Gascoigne wood mine'......with a puzzled look on her face she asked me if they mined wood there!! you can probably imagine what I called her. Tim will no doubt give you the definitive details, but the steel cord belt was transported in 300m lengths at a weight of 14.5t. |
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Post by dazbt on Nov 18, 2012 18:13:38 GMT -5
The South drift housed the Anderson Strathclyde (ASL) steelcord conveyor belt, 12.2 km long, with a lift of 800 metres, a speed of 8.4m/sec, carrying coal at 2,200 tonnes per hour. The total installed weight of the belt was approximately 2,500 tonnes. Coal was delivered onto the ASL via accelerator belts. The South tunnel was driven with the Robbins tunnelling machine, the actual machine was left underground once the tunnelling was completed. In order to drive the drifts, the heavily water bearing strata had to be frozen. The North drift had a Cable Belt and Tandem belt; the Cable Belt was 9,500 metres long, with a lift of 700 metres, carrying approx 2,000 tonnes per hour on its PVL (Preformed for Variable Load) belting. The actual rope length was 38.4 km. The cable belt did get extended but what length this took it too I dont know. Do you mean that the Cable Belt was extended further than the 9.5km(9.6km?), Tim or that it was extended to that length after initial installation at a shorter distance? |
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Post by alupin1 on Oct 23, 2014 11:56:35 GMT -5
Conveyor Drives I remember being used in S Notts Collieries.
As already stated
Huwood: TB 60, TB80 TB120 these had 1 set of driving drums.
Also TB 120D with 2 sets of driving drums each with a 120 HP motor and TB150D again a double drive. They also did a drive with a single 300HP motor
Sutcliffe: Tigeress (around 60 / 90 HP), Tiger (around 120HP)
Goliath and Super Goliath similar duty as the above Sutcliffe drives.
FSW made a convensional type conveyor drive similar to the TB150D and also a low height "In Seam" drive powered by a AFC (panzer) motor and gear box.
GR6, small drive around 50hp.
Meco Drives tended to be more widley used in N Notts.
Cable belts were install at Clifton and Linby. The Linby one being much longer.
Some Trunk Belt (main conveyors) had Booster Drives installed. This was a short converor typically 100-150 m long installed under the top belt of the main coal carring conveyor to boost its power.
This did away with transfer points and kept belt tensions down.
The drive between the electric motor and drums was via a Fluid Coupling. Up until the 1970's the coupling was filled with a mineral oil. Due to the fire risk the NCB instructed all these couplings to be replaced with ones that could use a "fire resistant fluid" For some reason Fluidrive the company that supplied all these couplings did not make a direct replacement so all the conveyor drives had to be redrilled and have matching half couplings fitted.
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Post by beltpatrol133 on Mar 7, 2021 13:34:32 GMT -5
Lioness heading belts with no loop, remember stamping on bottom belt to get it to run. Main South West belt at Denby Grange 2 hand turned wheels at back of loop to pull carriage back to tension belt
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Post by colly0410 on Apr 1, 2021 6:54:16 GMT -5
In my dream last night I was back down the pit & there was a slack conveyor belt slipping & screeching away: Woke up & my neighbour was revving up his van & the fan belt was screeching away. Funny how a noise encroaches into your dreams, & your dream seems to make use of the noise. Thing is Jordan (my neighbour) works in his dads garage but always has clapped out old cronks that are always conking out, lol...
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Better windings and better iron quality in stator and rotor??? Haven't a clue, just know it happens even in the best designed AC and DC motors.
