It is important that you know how your lift works so you can check
potential problems and make sure you are getting the best from your lift.
WHAT IS IN A TRACTION LIFT?
Traction elevators are assembled with more than 10,000 spare parts,
including motor, cables or ropes, sheave or pulley, counterweight,
cabin, overspeed governor, safety gear, buffer, variety sensor switch...
Some traction elevators also have gears between the motor and
sheave (geared lift), others will just connect the motor
directly to the sheave (gearless lift).
There are many safety device to keep the the lift going up and down safely.
Especially the function of over speed governor, safety gear, buffer,
and door sensor. Even you cut down the elevator wire rope,
the cabin may not fall down,
because the safety gear that installed at the bottom of cabin will stop the cabin fall down.
MR and MRL are two types of elevators, Fuji potensi MR elevator are able to
design with a small machine room for elevators,
but if it’s impossible to make the machine room also no need to worry about it,
because Fuji Potensi MRL elevator is able to offer you
the best solution to meet your building.
HOW DO TRACTION LIFTS WORK?
Traction lifts are a simple system.A motor is attached to a sheave (a toothed pulley),
with a rope or cable looped over it.The rope is attached at one end to the lift car,
and on the other end to a counterweight.
When the lift is called to a floor,the motor turns the sheave.
This motor can move in both directions– one moving the lift car up,the other moving it down.
As the lift car up,the counterweight down– and vice versa.
The counterweight means there is less strainon the motor and the whole system,
meaning that less power is requiredto move the lift car up or down.
This is similar to a see-saw– if there is only one person on the see-saw it takes far more energy to reach to the top,
whereas the balance between two people make it easier.
Most lifts will also have an Over speed Governor,
which monitors the speed of the lift.
It is usually linked to the rails in the shaft and can stop the lift car without cables if required.
WHY CHOOSE TRACTION TYPE NOT HYDRAULIC TYPE?
Traction lifts are more efficient and reliable than a hydraulic lift as there are far fewer mechanical operations and no fluid systems which can have faults. They also require less space than a hydraulic lift, which requires a large amount of oil stored in a reserve.
Traction lifts are much faster than hydraulic lifts – making them a better choice for high buildings.
Safety systems in a traction elevator are designed specifically to prevent ‘dead drops’ and injury through mechanical failure or cables breaking. For example, all the Fuji Potensi passenger elevator have an integrated disk brake which prevents the car falling. This is linked to the guide rails on the lift shaft, so if it starts to fall the over speed governor kicks into action and the brakes stop the car without requiring the cables.
More different details between traction and hydraulic type elevator, please check the article “Traction V.S Hydraulic Elevators:Which is Right for Your Building? ”
Whatever type of lift you go for, Potensi elevator are always on hand to help. Just get in touch with us for support, information and advice.