Can anyone explain what part of the hydraulic system makes that loud hissing sound when the elevator is about to stop or when it is going down? Our elevator does the same exact sounds and I always wondering!
@@Simos805engineering has progressed significantly over the years. Laminar flow with bigger hydraulic lines sometimes has something to do with it. Also mufflers as well as oil properties such as viscosity and also what the oil itself is actually made out of, are also factors
Looks like a pumping unit for a limited use limited access elevator max speed 30 fpm and that flexible hose to replaced or pressure tested every 6 years unless there is an over speed valve.
Interesting hydraulic hole-less elevator, I've seen an elevator similar to this one expect roped. Never seen a power unit like this one, I'm assuming the valve are top of the housing with a submerged pump in the oil tank. Runs on 3 phase power? 230,440 or more.
5:30 It May seem strange but the pump motor is usually submerged in the oil with the operating valves on top of the tank. It’s common these days to have the hydraulic cylinder in the side of the shaft, and often with a rope connection to the car. That saves having a deep bore hole underneath to accommodate it. There’s lots of problems creating that borehole in a crowded town or city.
So you don't have to watch the video Lucky Bulb replied to you, I will explain it for you. On the side of the door frame in the shaft, there is a lever with a wheel on the end. If you push on that, the door unlocks, and you can open it. On the side of the Elevator cab, there is a bar that pops in and out that pushed on that lever.
So I guess it's just a box mounted on what's basically an electric jack. Rather interesting. This one has internal doors which is odd for these kinds of elevators, but the fact that the outer doors swing open is already bizarre and foreign for Americans like myself.
