kgwhipp
Mechanical
- Dec 6, 2010
- 33
Hello All,
I'm working on a residential vehicle lift and just found out that I'm limited to SINGLE PHASE power. I'd originally spec'd a 10HP motor tied to our pump and estimated a ~60second lift time. Now that I'm no longer able to get a 10hp motor I'm struggling to find a way to maintain the 60seconds promised. Have 4 cylinders with about 11.6 gallons to move in 60 seconds, lift is gravity down and has an alignment system to keep the cylinders at the same stroke.
The cylinders are 3 stage telescoping. Thus it only takes about 500psi to lift the first (largest stage), but I'd like 1600+ PSI to be sure the system can make it past the last stage which only has a 2" active surface.
I'm considering a few options and tend to favor some over others but wanted to see if anyone might have some input.
1) Power two 5hp motors with single phase input VFD. Put two 5HP motors in parallel with the same pump into the circuit.
2) Try and get a 7.5 hp single phase VFD and use a TWO stage (log splitter) pump.
3) Put two 5HP motors in parallel with one high flow, low psi, and one high psi pump into the circuit.
4) Accumulator?
5) Would putting two motors/pumps in series accomplish anything?
6) Any other thoughts?
Thanks!
-Kevin
I'm working on a residential vehicle lift and just found out that I'm limited to SINGLE PHASE power. I'd originally spec'd a 10HP motor tied to our pump and estimated a ~60second lift time. Now that I'm no longer able to get a 10hp motor I'm struggling to find a way to maintain the 60seconds promised. Have 4 cylinders with about 11.6 gallons to move in 60 seconds, lift is gravity down and has an alignment system to keep the cylinders at the same stroke.
The cylinders are 3 stage telescoping. Thus it only takes about 500psi to lift the first (largest stage), but I'd like 1600+ PSI to be sure the system can make it past the last stage which only has a 2" active surface.
I'm considering a few options and tend to favor some over others but wanted to see if anyone might have some input.
1) Power two 5hp motors with single phase input VFD. Put two 5HP motors in parallel with the same pump into the circuit.
2) Try and get a 7.5 hp single phase VFD and use a TWO stage (log splitter) pump.
3) Put two 5HP motors in parallel with one high flow, low psi, and one high psi pump into the circuit.
4) Accumulator?
5) Would putting two motors/pumps in series accomplish anything?
6) Any other thoughts?
Thanks!
-Kevin