Guys & gals,
Who here has heard of the Direct Drive from Leitner?
http://en.leitner-ro...ER-Direct-Drive
Seems pretty interesting...
Thoughts on this?
2
Leitner Direct Drive
Started by Kicking Horse, Feb 03 2014 10:30 PM
17 replies to this topic
#2
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Posted 03 February 2014 - 11:23 PM
I have seen this before in a few of Leitner's youtube videos.
From the videos, this direct drive is said to be very quiet. I am not entirely sure how this big round red box works yet.
On a PDF from the website it has a simple description.
Basis The LEITNER direct drive, an in-house development, is the world’s only ropeway drive system that can be operated without gearbox.
Description The direct drive has a low-rpm synchronous motor, whose output shaft is directly connected with the sheave. The drive consists of only 3 moving parts
(rotor and two bearings), which rotate at the same speed as the sheave.
The electric motor is characterised by its absolute redundancy and availability. The rotor is equipped with permanent magnets, the stator has a segment- ed design and consists of 8 independent segments with 3 winding units each. The winding units can be replaced individually.
The braking system comprises a service and a safety brake, which both act directly on the drive sheave and are equipped with their own indepen- dent hydraulic system.
The drive sheave is connected with the output shaft by means of a quick-release radial tooth coupling and can be disconnected from the drive chain in a few easy steps.
From the videos, this direct drive is said to be very quiet. I am not entirely sure how this big round red box works yet.
On a PDF from the website it has a simple description.
Basis The LEITNER direct drive, an in-house development, is the world’s only ropeway drive system that can be operated without gearbox.
Description The direct drive has a low-rpm synchronous motor, whose output shaft is directly connected with the sheave. The drive consists of only 3 moving parts
(rotor and two bearings), which rotate at the same speed as the sheave.
The electric motor is characterised by its absolute redundancy and availability. The rotor is equipped with permanent magnets, the stator has a segment- ed design and consists of 8 independent segments with 3 winding units each. The winding units can be replaced individually.
The braking system comprises a service and a safety brake, which both act directly on the drive sheave and are equipped with their own indepen- dent hydraulic system.
The drive sheave is connected with the output shaft by means of a quick-release radial tooth coupling and can be disconnected from the drive chain in a few easy steps.
#3
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Posted 06 February 2014 - 09:46 PM
Great if you don't want an auxiliary drive. Doppelmayr have something similar.
Rob
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
#4
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Posted 06 February 2014 - 09:54 PM
Aussierob, on 06 February 2014 - 09:46 PM, said:
Great if you don't want an auxiliary drive. Doppelmayr have something similar.
That is true. Doppelmayr's Orange Bubble Express in Utah has a dedicated auxiliary drive as well as a generator for this lift if needed. I think the options are nice to have.
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#5
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Posted 07 February 2014 - 05:56 AM
I've heard of it. Sounds like a good deal, if it works as advertised. No gearbox, no high-speed shaft, no separate service brake system (I'd guess the 'service brake' mentioned is a copy of the emergency brake, activated separately of course). Looks like it saves a fair amount of space in the motor room. You still have an auxiliary diesel, whether it drives a hydraulic motor on the bullwheel or a generator for the main drive, but again no direct connection with moving parts to maintain.
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#6
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Posted 07 February 2014 - 10:33 AM
Aussierob, on 06 February 2014 - 09:46 PM, said:
Great if you don't want an auxiliary drive. Doppelmayr have something similar.
The new gondola at Vail (Poma) has no driveshaft-connected "big diesel". There are redundant electric motors with redundant electric drives and redundant gen sets.
This post has been edited by 2milehi: 07 February 2014 - 10:34 AM
Anything is possible when you don't understand what you are talking about.
#7
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Posted 08 February 2014 - 07:19 PM
Just a point on semantics. An auxiliary or standby drive is separate to the evacuation drive, which is what Skiliftsrock and liftmech are referring to. You can't connect an auxiliary drive without a gearbox.
Rob
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
#9
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Posted 09 February 2014 - 05:16 AM
Yes , Ring and pinion tertiary drive on the outer perimeter of the BW.
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#11
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Posted 10 February 2014 - 11:40 AM
Aussierob, on 08 February 2014 - 07:19 PM, said:
Just a point on semantics. An auxiliary or standby drive is separate to the evacuation drive, which is what Skiliftsrock and liftmech are referring to. You can't connect an auxiliary drive without a gearbox.
The River Run Gondola (Von Roll flavored) had three hydraulic motors that would mesh into a ring gear on the bullwheel. With two I6 diesels driving two hydraulic pumps, the lift would run at 4.0 m/s. This is a case where the gearbox was bypassed yet the lift could operate at ~80% designed speed.
Anything is possible when you don't understand what you are talking about.
#12
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Posted 10 February 2014 - 12:27 PM
My former Doppelmayr 8-MGD (built in 2007) had a single hydraulic motor for evac, crown gear on the bullwheel, and the bullwheel could be detached from the gearbox by a chain that connected two coaxial sprockets. That's what I call bypassing the gearbox...
#13
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Posted 10 February 2014 - 04:26 PM
I love this idea - but it's got to be an ungodly expensive motor.
There are three roads to ruin; women, gambling and technicians. The most pleasant is with women, the quickest is with gambling, but the surest is with technicians. Georges Pompidou
#14
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Posted 10 February 2014 - 07:10 PM
2milehi, on 10 February 2014 - 11:40 AM, said:
The River Run Gondola (Von Roll flavored) had three hydraulic motors that would mesh into a ring gear on the bullwheel. With two I6 diesels driving two hydraulic pumps, the lift would run at 4.0 m/s. This is a case where the gearbox was bypassed yet the lift could operate at ~80% designed speed.
Was that rated for continuous operation? Those open ring gears wear super quickly.
Rob
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
Ray's Rule for Precision - Measure with a micrometer, mark with chalk, cut with an axe.
#15
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Posted 10 February 2014 - 08:32 PM
Aussierob, on 10 February 2014 - 07:10 PM, said:
Was that rated for continuous operation? Those open ring gears wear super quickly.
I wouldn't run it for months but it ran all day a few times (mountain power outage). The gondola mechanic made sure ample grease was applied to the ring gear teeth of that bullwheel and it ran for a 1/2 hour once a week.
This post has been edited by 2milehi: 10 February 2014 - 08:37 PM
Anything is possible when you don't understand what you are talking about.
#16
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Posted 10 February 2014 - 08:35 PM
Razvan, on 10 February 2014 - 12:27 PM, said:
My former Doppelmayr 8-MGD (built in 2007) had a single hydraulic motor for evac, crown gear on the bullwheel, and the bullwheel could be detached from the gearbox by a chain that connected two coaxial sprockets. That's what I call bypassing the gearbox...
That is what Keystone's new River Run Gondola is equipped with (Doppelmayr). It is big enough for two hydraulic motors.
Anything is possible when you don't understand what you are talking about.
#17
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Posted 16 February 2014 - 03:02 PM
I just toured an installation with one of these drives and it's very impressive. We could easily talk in the motor room while the machine ran full speed. This lift had 4 bullwheel brakes, as there is no high speed shaft for a service brake. sorry for the blurry pic.
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This post has been edited by shelldog: 16 February 2014 - 03:39 PM
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#18
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Posted 19 March 2014 - 11:48 AM
For a typical FG, with say 400HP, using a stock/standard D9 or D10 CAT torque-hub is still a great idea, and means that the drive-shaft out of the motor can be a reasonable size, so the synch motor would not too exotic of expensive. The double-feeding AC drives are again built from x2 stock/standard items, and it looks like the double-drive software is figured out.
Since the financial lifetime of a chairlift can be associated with the F-lifetime of a gear-box, this arrangement could indeed be very cost-effective to own long-term. If someone has a problem with their drive-hub, just call Finning (or other CAT rep) and get an exchange drive-hub... quick & cheap.
> S-brake disc off of a tail extension from the motor non-drive end.
> Evac via hydraulic motor & BW ring-gear
> If you absolutely must have an aux-drive (ie chronic unreliable power), then just buy a gen-set & a transfer-switch.
Since the financial lifetime of a chairlift can be associated with the F-lifetime of a gear-box, this arrangement could indeed be very cost-effective to own long-term. If someone has a problem with their drive-hub, just call Finning (or other CAT rep) and get an exchange drive-hub... quick & cheap.
> S-brake disc off of a tail extension from the motor non-drive end.
> Evac via hydraulic motor & BW ring-gear
> If you absolutely must have an aux-drive (ie chronic unreliable power), then just buy a gen-set & a transfer-switch.
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