Hydrophilic composition for use with a lubricating system as well as an apparatus and method for using the same
Inactive Publication Date: 2013-11-14
AB SKF
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[0015]In addition or in the alternative, the hydrophilic fibers may be provided in the form of a fabric material, such as a non-woven pad, mat or cloth. The fabric material may be affixed to or embedded in a surface that is exposed to, i.e. is in fluid communication with, the lubricant, but preferably spaced away from the surface that is in need of lubrication. Again, by allowing the oil or other base lubricating fluid to contact the hydrophilic surface/fabric material, water and/or other hydrophilic substances can be effectively removed from the lubricant.
[0016]Since the hydrophilic fibers can be produced from a wide range of materials, the present teachings advantageously enable a wide flexibility or choice in the selection of the hydrophilic (fiber or fibrous) material.
[0017]As utilized in the present teachings, the term “hydrophilic” means that the surface of a flat piece of the material (i.e. the material that will be used to form the hydrophilic fibers or fibrous material) will be readily covered (wetted) by water, because that will reduce the total surface energy of the system. The more hydrophilic the material is, the smaller the “contact angle” of the drop of water on a flat smooth surface of such material will be, which makes the contact angle a suitable measure of the degree of hydrophilicity in accordance with the present teachings. In principle, if a small drop o
Problems solved by technology
The performance of known lubricating systems is negatively affected when water or other hydrophilic materials (fluids) are undesirably introduced into the system during the operation of a device that is being lubricated by the lubricating system.
Such u
Method used
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embodiment 1
[0108]2. A grease , wherein the fibers comprise at least two portions having different physical and / or chemical properties.
embodiment 2
[0109]3. A grease , wherein at least one of the portions has a higher affinity to a like portion than to the oil and / or lubricating fluid, thereby imparting a self-assembly property to the thickening fibers.
[0110]4. A grease according to any preceding embodiment, wherein the fibers have a length of 100-500 microns.
embodiment 4
[0111]5. A grease , further comprising oleophilic thickening fibers having a length of 1-100 microns.
[0112]6. A grease according to any one of embodiments 1-3, wherein the fibers have a length of 1-100 microns.
[0113]7. A grease according to any preceding embodiment, wherein the fibers have a length that is at least about 5-10 times the diameter thereof.
[0114]8. A grease according to any preceding embodiment, wherein the thickening fibers are a mixture of organic fibers, e.g., polypropylene, and inorganic, e.g., ceramics, e.g., aluminum oxide and / or silicon dioxide.
[0115]9. A grease according to any preceding embodiment, wherein the fibers also have oleophobic and / or hydrophilic properties.
[0116]10. A grease according to any preceding embodiment, further comprising non-oleophilic fibers having oleophobic and / or hydrophilic and / or hygroscopic properties.
[0117]11. A grease according to any preceding embodiment, wherein the fibers are biodegradable.
[0118]12. A grease according to any pr...
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Abstract
A hydrophilic composition for use with a lubricating system comprises hydrophilic fibers having a diameter between 50 nm and 10 microns and a length that is at least 5 times the diameter. The hydrophilic fibers having a strong affinity for at least one of water and other hydrophilic fluids and may remove or eliminate free or dissolved water in a lubricating system comprising at least one of an oil and a lubricating fluid.
Description
CROSS-REFERENCE[0001]The present application claims priority to US provisional application no. 61 / 406,416 filed on Oct. 25, 2010, U.S. provisional application no. 61 / 418,081 filed on Nov. 30, 2010, U.S. provisional application no. 61 / 421,985 filed on Dec. 10, 2010 and U.S. provisional application no. 61 / 426,083 filed on Dec. 22, 2010, the contents of all of which are incorporated by reference as if fully set forth herein.TECHNICAL FIELD[0002]The present invention relates to a hydrophilic composition for use with a lubricating system and to an apparatus and a method using the same to remove water or other hydrophilic materials from the lubricating system.RELATED ART[0003]US 2005 / 0197260 discloses an environmentally-friendly grease composition comprising a vegetable oil and a cellulose fiber, as well as also glycerin, a rust inhibitor and / or fatty acid ester, lecithin and / or phophatidyl choline.[0004]U.S. Pat. No. 6,482,780 discloses a grease composition for a roller bearing comprisin...
Claims
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