CN tower elevator machine rooms
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- Опубліковано 3 жов 2024
- I was on a Canadian Elevator Industry Educational Program (CEIEP) instructor training seminar in Toronto, when a friend from Otis asked if I would like to see the machine rooms for the elevators. The first part of the video is looking up from the bottom of the hoistway's The second is inside the machine rooms looking at the hoist machines, which are the second biggest hoist machines otis makes the biggest they make were made for the world trade towers. Otis had just replaced the armature (the turning part of the hoist machine) and it alone weighs 6000lbs. You could say the are the biggest now. The third part of the video is of the sway pendulum which detects building sway. If it makes contact at the bottom twice in 5 minutes it slows the elevators down from 1200 feet per minute to 500 feet per minute.
The CN Tower is a communications and observation tower in Downtown Toronto, Ontario, Canada. Standing 553.33 metres tall, it was completed in 1976, becoming the world's tallest free-standing structure and world's tallest tower at the time.
I like that sway detection device - quite simple
Should have filmed this in landscape mode.
The 339, they actually have it in the Stratosphere Las Vegas.
Great! Very impressive machinery. How many kilowatts/horsepower does one of these gearless machines have, and at which DC voltage do they operate?
These gear less DC traction machines have an MG set which changes AC to DC (motor generator) the DC voltage at the communicator could be upwards of 480V DC. The HP rating is probably over 100 +.
This machine room is well designed with safety, with the steel cages around the machines. Which is probably the same for the over speed govenor pulley.
Very uncommon practice.
Yes and also useless and annoying to engineers. The motor room must be locked soooo...
Would love to see another video of this motor room, but in wide angle.
im guessing that sway detection bar doesn't have the ability to make the elevators go slower than 500fpm or in the event of seismic activity disable the elevator does it?
yes we do get earthquakes here in Toronto. Small ones but we can get up in to the sixes
What's the control type? Otis UCL? AUL? Or has it been moded?
This technology was from the early 1970's. Suspect the systems have been restored since then during restoration.
Why does the motor sound so weird when leveling! (Thanks for the explanation!)
One of those traction machines might have been powered by a DC Drive instead of an MG Set, which creates harmonics in the field/armature/often the bearings. Unlike with the MG set which cuts out when the leveling field cuts in "the chock" from the DC Drive can cause these noises, when the elevator is leveling.
@@TheTheo58 I know it is a scr drive. Thanks for explaining that noise. If I ever visit the cn tower I will try to plan a tour of the mechanical in advance.
VVDC?
What Is Cn
+Freight Johnson Canadian National
Sorry