I am working on a project using magnetorheological fluid (MR Fluid).
Right now, I have a setup for testing the Mr fluid with two syringes connected by a small piece of ptfe tubing. I can lock the fluid when holding a neodymium magnet to side.
My goal is to replace that magnet with a solenoid magnet that the tube passes through so that I can lock the fluid at will. My problem lies with the magnet design.
I have tried using soft steel pipe that is a snug fit around my tubing with washers on both ends as a spool. I then use about a thousand turns of 24 gauge wire around said spool to create my magnet. Running it with 12 volts was drawing about 1.2 amps and not creating a strong enough field to lock the MR fluid, and when i tried turning the voltage up, it increased the amp draw but the magnetic proceeded to get very hot. I have also tried forgoing the pipe and wrapping the wire directly around the tubing with similar results. What can I do to make the magnet stronger, and stay cooler?
Details on materials
Ptfe tubing is 0.25" od
steel tubing is 0.5" od 0.25" wall
power is benchtop powersupply with 30v 5a max
Any advice is appreciated.
Right now, I have a setup for testing the Mr fluid with two syringes connected by a small piece of ptfe tubing. I can lock the fluid when holding a neodymium magnet to side.
My goal is to replace that magnet with a solenoid magnet that the tube passes through so that I can lock the fluid at will. My problem lies with the magnet design.
I have tried using soft steel pipe that is a snug fit around my tubing with washers on both ends as a spool. I then use about a thousand turns of 24 gauge wire around said spool to create my magnet. Running it with 12 volts was drawing about 1.2 amps and not creating a strong enough field to lock the MR fluid, and when i tried turning the voltage up, it increased the amp draw but the magnetic proceeded to get very hot. I have also tried forgoing the pipe and wrapping the wire directly around the tubing with similar results. What can I do to make the magnet stronger, and stay cooler?
Details on materials
Ptfe tubing is 0.25" od
steel tubing is 0.5" od 0.25" wall
power is benchtop powersupply with 30v 5a max
Any advice is appreciated.