Hydroelastic fluids for fluid filled elastomeric damping devices
View Patent ↗A vibration damping device has a first support member and a second support member. A first component and a second component are disposed between the first support member and the second support member to define a first fluid chamber and a second fluid chamber. A channel extends between the first and second chambers. During compression and extension of the vibration damping device, fluid transfers between the first and second chamber to provide a damping force for the vibration damping device. The fluid within the chambers of the vibration damping device has a fluid density in the range of 1.25 g/cm 3 to 2.2 g/cm 3 , a fluid viscosity below 10 cSt @ 20° C. and a fluid surface tension below 40 dynes @ 20° C.
1. A vibration damping device comprising:
a first support member;
a second support member;
a first component disposed between the first support member and the second support member;
a second component disposed between the first support member and the second support member;
a first chamber defined by said first component;
a second chamber defined by said second component;
a channel extending between the first chamber and the second chamber; and
a hydroelastic fluid disposed within said first chamber, said second chamber and said channel, wherein the hydroelastic fluid includes at least one of aqueous brine, a fluorine based fluid and a cesium formate fluid; and wherein
said fluid has a fluid density of 1.25 g/cm 3 to 2.2 g/cm 3 .
2. The vibration damping device according to claim 1 , wherein said fluid has a fluid viscosity below 5 cSt @ 20° C.
3. The vibration damping device according to claim 2 , wherein said fluid has a fluid surface tension below 40 dynes @ 20° C.
4. The vibration damping device according to claim 2 , wherein said fluid has a fluid surface tension below 30 dynes @ 25° C.
5. The vibration damping device according to claim 2 , wherein said fluid has a fluid surface tension below 20 dynes @ 25° C.
6. The vibration damping device according to claim 1 , wherein said fluid has a fluid viscosity below 1 cSt @ 20° C.
7. The vibration damping device according to claim 6 , wherein said fluid has a fluid surface tension below 40 dynes @ 20° C.
8. The vibration damping device according to claim 6 , wherein said fluid has a fluid surface tension below 30 dynes @ 25° C.
9. The vibration damping device according to claim 6 , wherein said fluid has a fluid surface tension below 20 dynes @ 25° C.
10. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 40 dynes @ 20° C.
11. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 30 dynes @ 25° C.
12. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 20 dynes @ 25° C.
13. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 40 dynes @ 20° C.
14. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 30 dynes @ 25° C.
15. The vibration damping device according to claim 1 , wherein said fluid has a fluid surface tension below 20 dynes @ 25° C.
16. The vibration damping device according to claim 1 , wherein said fluid is an aqueous brine.
17. The vibration damping device according to claim 1 , wherein said fluid is a fluorine based fluid.
18. The vibration damping device according to claim 1 , wherein said fluid is a cesium formate fluid.
19. A vibration damping device comprising:
a first support member;
a second support member;
a first component disposed between the first support member and the second support member;
a second component disposed between the first support member and the second support member;
a first chamber defined by said first component;
a second chamber defined by said second component;
a channel extending between the first chamber and the second chamber; and
a hydroelastic fluid disposed within said first chamber, said second chamber and said channel, and wherein the hydroelastic fluid includes at least one of aqueous brine, a fluorine based fluid, and a cesium formate fluid.
20. The vibration damping device of claim 19 , wherein the hydroelastic fluid comprises a fluid viscosity below about 10 cSt @20° C.