Liebherr - Increase rope´s service life by hoist rope cut-off
Вставка
- Опубліковано 18 жов 2024
- Using multilayer spooling of the hoist rope, as is normal on mobile and crawler cranes, the greatest stress for the rope occurs at the crossing areas on the winch. The damage which occurs here generally plays a major part in the rope reaching its "replacement state". With this movie we want to show how you can increase rope’s service life by hoist rope cut-off.
I appreciate your well wishes for my everyday crane work Liebherr.
Haha, I was thinking the same thing.
Valuable information in case I end up with a crane one day
Here's the more important lesson: Use this idea on ANY thing that has a spool. The same principal will apply to all spools. That's why I watch these kind of videos. I have a boat winch that has this same problem. Now, I know to solder the cutting point first, something I never would have thought of. Then apply the 20x diameter rule and change the wear pattern on the spool. Just saved me a ton of money!
@@valuedhumanoid6574 im about to make a farmers eye and soldering the end like that is really neat, i wouldnt of thought of that either.
yeah!
And you watching this because..
Thank you for asking for the English version.
I never considered such a train of thought, but today I go to bed a little smarter.
That sums up these kinds of industrial videos and why I love them.
Kinda amazing that some young engineer figured out how to save millions of dollars in service work by a simple cutting of 3 ft of cable.
an older engineer would have known that it is much more lucrative to sell a whole new cable than few hours of work.
@@vallevaan *economist*
More likely an accountant/manager demanded just the bad section be cut out ;) after all it's cheaper to allow the insurer to pay out for a claim than the owner perform maintenance.
How do you know how old he or she is?
@@lariwoo They're not cutting out a bad section.
Thank you liebherr. I also wish all other viewers all the best with their everyday crane work as well.
oh shi* my parents just gifted me a new crane and I am glad to have seen this!
Slipping and cutting Travelling Block (The travelling pulley that hoists pipe in and out of the hole) Line has been carried out for at least the last 50-60 years in the oil industry, so there's nothing new in this stuff. A calculation is made to determine how many ton miles the rope has done and at a pre determined ton mileage the wire line is slipped, usually on the third slip a length of line is cut to prevent the drum from becoming over full.
Greetings mister rodgerson, can you give me an example?
The calculation and formula can be found on drilling formulas.com here is and example of ton miles for a round trip (a round trip is running drill pipe into and back out of a well).
RTTM = (Wp x D x (Lp + D) + (2 x D) x (2 x Wb + Wc)) ÷ (5280 x 2000)
where
RTTM = Round Trip Ton-Miles
Wp = buoyed weight of drill pipe in lb/ft
D = hole measured depth in ft
Lp = Average length per stand of drill pipe in ft
Wb = weight of travelling block in lb
Wc = buoyed weight of BHA (drill collar + heavy weight drill pipe + BHA) in mud minus the buoyed weight of the same length of drill pipe in lb
** If you have BHA (mud motor, MWD, etc) and HWDP, you must add those weight into calculation as well not just only drill collar weight. **
2000 = number of pounds in one ton
5280 = number of feet in one mile
All of a sudden 🤔 I feel like buying a crane 🤷
If you need an operator I'l be available.
How exactly does this prelong the life of the rope?
The point where rope rubs against oneself at full tension is only at certain intervals along the rope. Unspooling and shortening the rope moves all those points off that full tension intersection.
@@rokadamlje5365 That clears it for me! Thanks for the reply!
@Jimmy De'Souza The scrolls of the drum are machined in different ways. At points the rope lies parallel to the rope below and at others it lies across at an angle.
@Jimmy De'Souza ua-cam.com/video/5dGcoAP9XA8/v-deo.html
Watch from about 40 seconds. There's a clip that illustrates my point better.
It's an obvious change in the way the rope spools on to the drum.
Vielen Dank, dass Sie nach der englischen Version gefragt haben.
When has it become legal to heat wire rope or even weld the end
I like the mysterious background music, was as if the workers weren't sure if it was going to work.
I've worked with wire rope all my life and never had the attached end get damaged, the rest of the rope, yes. Flat spots, frays and breaks, but not on the attached end. Explanation?
Maybe if you didn't skip to the end, you'd get it.
☝️ lol this takes win😅
Removing 3 feet of the rope moves the entire rope along the drum therefor it no longer rubs on the same places against itself. So it prolongs its life.
They let you work with cranes??
@@davidlol1983 So how often do you need to do this? That's 3ft less of rope left then another 3ft off. then another 3ft off...lol soon you don't have enough rope length anymore....
v nice job liebherr
Watche the crane Destruction from Terminator 3. Crane chase is aweome
Ah, now I get it. The message in all this techy overinformation is:
Once your rope is close to worn, relocate it on the drum, so other parts can also take a bit of a bashing.
Old bloke doing the angle grinding cut needs earplugs, unless he's deaf already ;)
maybe he is not a soyboy like you
You need glasses. He was wearing ear plugs.
@@Balenza345 Earplugs are usually not "white guy flesh colored", so I doubt he's wearing them.
@@1sydman1 Insecure?
@@robertbritton656 no just a soyboy that has periods.
Merci liebherr
Good info.
@youtube please reccomend shit like this not the useless social shit kids need to get more info about how things work
now i need a crane in my life...
I have done this on many cranes, dozers and oilfield winch trucks... spool it all the way out and then you just loosen the dead end clamps and pull the rope through the backside, re clamp and torch the dead end off-and cap with solder. 10 minutes instead of 2 hours. Horrible waste of time- 2 hours on a jobsite can cost tens to hundreds of thousands of dollars especially on multi crane/complicated lifts.
10 minutes is an exaggeration but yes it's faster than what was shown in the video
Stuff like this can easily be scheduled in, so there's no loss of sales. This is just maintenance, which you always schedule in anyway. 2 hours of work is not a lot a long time to do this work.
I'm not sure how you came up with the conclusion about the figures, but how did you? Renting a crane like this only costs a few thousand dollars a day including operator. Nobody is losing any significant amounts. The crane will only have a downtime of 1 working day at the most.
The point is still the same - company that plans maintenance should not expect unforseen loss of big contracts. No company has full demand on their equipment anyway, unless it's rented out on a longer term.
I imagine Leighberr are bit more professional than you though Blue waffle
You shouldn’t torch or weld on an oily machine with lubricant and electrics everywhere around. Everybody does, however Liebherr must show the correct way.
And... spooling the cable of such a crane all the way out takes already 5 mins or so, depending on the length. I guess you worked on much smaller mopeds.
Can not understand at all. same thing in both cases
Excelente. Ya 😎
I will never know how i got here from pornhub.
Watching this in case someone bought me a LTM1750-9.1
Watch terminator 3 crane chase. An epic scene from a bad movie
grount, grount then soldert? come on. that's just being difficuld.
i dont get it, why doesn't the hoist rope come at the correct length from the factory itself?
The rope is longer then necessary to make it readjustable
@@alexanderbreitschaedel9070 but is there any reason to readjust it? & what I dint understand is now that they have shortened it they obviously can't lengthen it in the future. so they have to buy a new one again? which doesn't make any logical sense
@@AmateurPetrolHead it could once be readjusted. Readjustment is to distribute the pressure on the drum to other parts of the rope so the rope doesn't get flat where the rope layers touch each other
@@AmateurPetrolHead The rope is longer than it needs to be when it is new . In this case they only removed about 24 inches . And that is nothing to worry about . I'm sure they can do this more than once . Bu the whole idea is to realign the high stress areas of the rope so it will increase service life . To make it easier for you to understand if the life is say 25 thousand cycles . Do this will double it . And without the labor a rope like that cost tens of thousands of dollars . So it is well worth doing it . Keep in mind this only holds true if the rope has not been damaged along it's life for other reasons .
@@lhr1701 ah, okay. thanks for the explanation
maybe change the still image of this vid to something not showing any hooks... I'll never buy or operate any of your equipment (don't have no use for it, own a fridge though ; ), but I know what went wrong in Rostock : / #triggered
why does the buyer need to even know ANY of this if the Liebherr enigneer is doing the work anyway? just send me the email for the service update. totally useless for the end user.
It's so us weekend warriors can use this technique for our every day crane needs.
Please post with subtitles in Spanish, thanks!