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How to design a cable?

What is a better system to design an elevator with, cable or hydraulic?

  • I've got a HUGE project for Engineering graphics and design, and I need a little help. I must design a lift for a double storey building. Which system would be the best for this, cable or hydraulic? The hydraulic seems more reliable, and easier to sketch (I have to put in A LOT of detail, design the circuit boards, all the parts). But for that there must be a underground room for the piston and reservoir. The cable system needs a smaller room, but the mechanical aspect of it seems more difficult, but I'd do it if it would function better. I'm very interested in these kind of stuff, but it's not a passion, just a hobby. So, is there anything I should look out for, e.g. what system will there be to safely guide the elevator down if the circuits fry, what will happen if the power goes out. Appreciate the help!

  • Answer:

    either system works well if correctly designed: hydraulic: for a two storey building, the base of the cylinder can be at grade, connected to the top of the elevator. Use a pressure balancing valve and flow control so one on each side lift together or use 1 cylinder and a cable connection ... 1 cylinder lifts but a cable is attached to each side of the elevator. It is also poosible to use a water supply as the dynamic force, but disposal would either go to waste, or to a water collection system for re-use. cable: a cable system normally uses a winch house at the top of the elevator shaft which is great from a maintenance point of view, but adds cost for the enclosure. You need to add emergency clamp brakes on the elevator travel guides in case the cable breaks ... under tension the clamps are off, without tension (cable breaks) the clamps apply usually a cable system is less costly ... but watch out for the elevator code in your area

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either system works well if correctly designed: hydraulic: for a two storey building, the base of the cylinder can be at grade, connected to the top of the elevator. Use a pressure balancing valve and flow control so one on each side lift together or use 1 cylinder and a cable connection ... 1 cylinder lifts but a cable is attached to each side of the elevator. It is also poosible to use a water supply as the dynamic force, but disposal would either go to waste, or to a water collection system for re-use. cable: a cable system normally uses a winch house at the top of the elevator shaft which is great from a maintenance point of view, but adds cost for the enclosure. You need to add emergency clamp brakes on the elevator travel guides in case the cable breaks ... under tension the clamps are off, without tension (cable breaks) the clamps apply usually a cable system is less costly ... but watch out for the elevator code in your area

SATERO

A pure cable system requires a hut above the elevator shaft and structure to take the weight and forces of the motor, pulleys, cables, chamber, door mechanisms, etc., but this could be built into the frame of the shaft. Hydraulic can sit on the ground, although it is usually drilled in, but I would think hydraulic pulling cables would have all the disadvantages of both systems. For a two story building, I would say that a drilled shaft under the center of the cab would be the best - it only has to be one story deep unless ground wetness makes it very messy.

Many elevators for two story buildings are in fact hydraulic. I suspect it is a less expensive design for such a small vertical lift. The whole system can be installed in the basement or underground and there is not need for a structure on the roof to lift the elevator.

A pure cable system requires a hut above the elevator shaft and structure to take the weight and forces of the motor, pulleys, cables, chamber, door mechanisms, etc., but this could be built into the frame of the shaft. Hydraulic can sit on the ground, although it is usually drilled in, but I would think hydraulic pulling cables would have all the disadvantages of both systems. For a two story building, I would say that a drilled shaft under the center of the cab would be the best - it only has to be one story deep unless ground wetness makes it very messy.

mike1942-f

Many elevators for two story buildings are in fact hydraulic. I suspect it is a less expensive design for such a small vertical lift. The whole system can be installed in the basement or underground and there is not need for a structure on the roof to lift the elevator.

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