Hi all. Sorry if this has been asked but I didn't find anything on it. Just a few questions.
1) On rotating trams, what turns the cabin? Is there some sort of motor in/on the cabin? How is it powered? I may be wrong but it seems like a hydraulic generator hooked to the track ropes could supply a hydraulic motor on the cabin. The cabin would only rotate while ascending/descending. This would just have a continuous loop of oil.
2) What are the boxes on the uphill side of tram carriages? It looks like a couple sheaves live under there. Is this where the track rope brakes reside? Are they spring powered?
3) Are haul cables wrapped around a central sheave on non-rescue ropeway equipped trams? Can the brakes be used to descend?
4) On trams with a rescue loop installed, is there just a simple carriage the maintenance/rescue crew attaches to it? Are the haul ropes clamped to the carriage in these instances?
Thanks a lot!
Nick
0
Tram Questions
Started by DakarNick, Sep 21 2008 05:27 PM
3 replies to this topic
#2
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- Industry II
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Posted 26 September 2008 - 04:15 AM
DakarNick, on Sep 21 2008, 07:27 PM, said:
Hi all. Sorry if this has been asked but I didn't find anything on it. Just a few questions.
1) On rotating trams, what turns the cabin? Is there some sort of motor in/on the cabin? How is it powered? I may be wrong but it seems like a hydraulic generator hooked to the track ropes could supply a hydraulic motor on the cabin. The cabin would only rotate while ascending/descending. This would just have a continuous loop of oil.
The Palm Springs tram has Rotating cabins, though I have to admit, I don't know exactly their drive mechanism. Your idea of a hydraulic generator running off the movement up/down the track ropes seems novel, but problematic...
2) What are the boxes on the uphill side of tram carriages? It looks like a couple sheaves live under there. Is this where the track rope brakes reside? Are they spring powered?
Many newer trams have no track brakes, older models, such as the old JH tram had 4 separate hydraulic track brake cylinders.
3) Are haul cables wrapped around a central sheave on non-rescue ropeway equipped trams? Can the brakes be used to descend?
Haul cables may be ended in sockets/ferrules and pinned or the haul may be continuous and the carriage clamped to the haul. Using brakes to descend is not an option.
4) On trams with a rescue loop installed, is there just a simple carriage the maintenance/rescue crew attaches to it? Are the haul ropes clamped to the carriage in these instances?
[color="#FF0000"]No experience with a separate rescue setup. We lower passengers out the cabins.
Thanks a lot!
Nick
1) On rotating trams, what turns the cabin? Is there some sort of motor in/on the cabin? How is it powered? I may be wrong but it seems like a hydraulic generator hooked to the track ropes could supply a hydraulic motor on the cabin. The cabin would only rotate while ascending/descending. This would just have a continuous loop of oil.
The Palm Springs tram has Rotating cabins, though I have to admit, I don't know exactly their drive mechanism. Your idea of a hydraulic generator running off the movement up/down the track ropes seems novel, but problematic...
2) What are the boxes on the uphill side of tram carriages? It looks like a couple sheaves live under there. Is this where the track rope brakes reside? Are they spring powered?
Many newer trams have no track brakes, older models, such as the old JH tram had 4 separate hydraulic track brake cylinders.
3) Are haul cables wrapped around a central sheave on non-rescue ropeway equipped trams? Can the brakes be used to descend?
Haul cables may be ended in sockets/ferrules and pinned or the haul may be continuous and the carriage clamped to the haul. Using brakes to descend is not an option.
4) On trams with a rescue loop installed, is there just a simple carriage the maintenance/rescue crew attaches to it? Are the haul ropes clamped to the carriage in these instances?
[color="#FF0000"]No experience with a separate rescue setup. We lower passengers out the cabins.
Thanks a lot!
Nick
#3
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Posted 26 September 2008 - 12:30 PM
I think this is right; Palm springs tram has an electric motor under the cabin that spins the floor, it recharges both at the terminals and by way of a generator on the cabin carriage.
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