Magnetorheological composition and device
A composition, magnetorheological technology, applied in the direction of magnetic objects, shock absorbers, shock absorbers, etc., can solve problems such as difficult to handle, expensive small-diameter magnetically responsive particles, dust explosion, etc.
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Embodiment 1
[0052] The magnetorheological fluid is made by mixing 20% ATW-230 iron (water atomized irregularly shaped large particle powder, containing 99% iron, less than 1% oxygen, less than 1% nitrogen and 0.01% carbon), 1% hydroxystearin Lithium disulfide, 1% molybdenum disulfide and the remaining volume (78%) of a synthetic hydrocarbon derived from polyalphaolefin sold as Durasyn(R) 162. The resulting fluid was tested on a truck seat damper, the results of which are illustrated in, Figure 1a , which shows a performance characteristic curve of force (lbs) versus velocity (seconds), Figure 1b , a performance curve of force (lbs) versus relative position (volts) is shown. The test method described measures the forces developed in the seat damper at 2 and 8 in / s and 0, 1 and 2 amperes with one inch stroke. After adding 1% molybdenum disulfide to the magnetorheological fluid formulation, ( Figure 4a and 4b ) The force peak in the comparative example is significantly reduced, as ...
Embodiment 2
[0054] Magnetorheological fluid was synthesized by mixing 20% ATW-230 iron, 1% lithium hydroxystearate, 2% molybdenum disulfide and the remaining volume (77%) derived from poly-V-olefin sold as Durasyn 162 prepared from hydrocarbon oils. The resulting fluid was tested on a truck seat damper, the results of which are illustrated in, Figure 2a , which shows a performance characteristic curve of force (lbs) versus velocity (seconds), Figure 2b , a performance curve of force (lbs) versus relative position (volts) is shown. The test method described measures the forces developed in the seat damper at 2 and 8 in / s and 0, 1 and 2 amperes with one inch stroke. After adding 2% molybdenum disulfide to the magnetorheological fluid formulation, ( Figure 4a and 4b ) The force peak in the comparative example is significantly reduced, as Figure 2a and 2b shown. Off state force is reduced from 160 lbs to 137 lbs and on state force is reduced from 590 lbs to 470 lbs.
Embodiment 3
[0056] The magnetorheological fluid was obtained by mixing 20% ATW-230 iron, 1% lithium hydroxystearate, 4 g (8%) polytetrafluoroethylene and the remaining volume (71%) of poly-V- Synthetic hydrocarbon oils obtained from olefins. The resulting fluid was tested on a truck seat damper, the results of which are illustrated in, Figure 3a , which shows a performance characteristic curve of force (lbs) versus velocity (seconds), Figure 3b , a performance curve of force (lbs) versus relative position (volts) is shown. The test method described measures the forces developed in the seat damper at 2 and 8 in / s and 0, 1 and 2 amperes with one inch stroke. As shown, force spikes (dots on the solid line) are evident in the absence of the friction reducing additive. After adding poly(tetrafluoroethylene) (fluoropolymer) to the magnetorheological fluid formulation, ( Figure 4a and 4b ) The force peak in the comparative example is significantly reduced, as Figure 3a and 3b shown....
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