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CA-3279005-C - BEARING AND BEARING LINER

CA3279005CCA 3279005 CCA3279005 CCA 3279005CCA-3279005-C

Abstract

Products and methods related to the manufacture of a bearing with a bearing liner and the bearing liner on its own. The bearing liner within the bearing includes a fabric with a bonding side polymerized resin composition dispensed on one side and a sliding side polymerized resin composition disposed on a second side that contains dispersed lubricant. The liner preparation also offers the ability for the liner to conform to a selected bearing surface.

Inventors

  • Richard R. Soelch
  • Brandyn Duane LEWIS
  • Grant A. Drew

Assignees

  • NEW HAMPSHIRE BALL BEARINGS, INC.

Dates

Publication Date
20260505
Application Date
20231205
Priority Date
20230106

Claims (5)

  1. 17 What is claimed is: 1. A method for preparing a bearing comprising: a. supplying a bearing having a first surface and second surface, wherein said first and second surfaces are configured to slide against one another; b. providing a bearing liner having a first bonding side and a second sliding side, wherein said bearing liner comprises woven or non-woven fabric having a thickness of 0.005 inches to 0.030 inches, a basis weight of 5.0 grams/ft2 to 70 grams/ft2 and an initial airflow permeability of 1 cfm to 100 cfm as measured by ASTM D737 (2018); c. applying a first bonding side resin composition containing polymerizable resin including glass and/or carbon fibers to said bonding side of said liner and partially polymerizing; d. applying a second sliding side resin composition containing polymerizable resin to said second sliding side of said bearing liner and partially polymerizing, wherein said second sliding side resin composition includes a lubricant at a level of 1.0 % (wt.) to 60.0 % (wt.); e. applying said first bonding side of said bearing liner containing partially polymerizable resin to one of said first or second surfaces of said bearing and bonding said first bonding side of said bearing liner to said first or second bearing surfaces.
  2. 2. The method of claim 1 wherein said lubricant comprises a mixture of polytetrafluoroethylene particulate and a perfluoropolyether oil.
  3. 3. The method of claim 2 wherein said polytetrafluorethylene particulate is present in said second sliding side resin composition at a level of 15.0 % (wt.) to 22.0 % (wt.) and said 18 perfluoropolyether oil is present in said sliding side resin composition at a level of 25.0 % (wt.) to 33.0 % (wt.).
  4. 4. The method of claim 1 wherein said glass and/or carbon fibers are present in said first bonding side resin composition at a level in the range of 2.0 % (wt.) to 40.0 % (wt.). 5. The method of claim 1 wherein steps (c) and (d) are done in sequence. 6. The method of claim 1 wherein said partial polymerization in steps (c) and (d) are initiated by exposure of said first bonding side resin composition and said second sliding side resin composition to UV light of: 0.1 – 0.5 J/cm2 (UVA); 0.05-0.
  5. 5 J/cm2 (UVB); 0.010-00.100 J/cm2 UVC; and 0.5-5.0 J/cm2 (UVV). 7. The method of claim 1 wherein said polymerizable resin in said first bonding side resin composition provides a polyacrylate, phenolic resin, aromatic polyamide, epoxy resin, polyimide, poly(amide-imide), polyetherketone, polyetheretherketone, or polyester. 8. The method of claim 1 wherein said polymerizable resin in said second sliding side resin composition provides a polyacrylate, phenolic resin, aromatic polyamide, epoxy resin, polyimide, poly(amide-imide), polyetherketone, polyetheretherketone, or polyester. 19 9. The method of claim 1 wherein said polymerizable resin in said first bonding side resin composition comprises a polymer of a mixture of polymerized tris(2-hydroxyethyl) isocyanurate triacrylate monomer and polymerized trimethylolpropane triacrylate monomer. 10. The method of claim 12 wherein said polymerizable resin in said second sliding side resin composition comprises a polymer of a mixture of polymerized tris(2-hydroxyethyl) isocyanurate triacrylate monomer and polymerized trimethylolpropane triacrylate monomer. 11. The method of claim 12 wherein said bearing produces a maximum torque of no greater than 67 in-lbs at zero cycles in an AS81934 bushing wear test.

Description

BEARING AND BEARING LINER Field The present invention is directed at products and methods related to the manufacture of a bearing with a bearing liner and the bearing liner on its own. The bearing liner within the bearing includes a fabric with a bonding side polymerized resin composition dispensed on one side and a sliding side polymerized resin composition disposed on a second side that contains dispersed lubricant. The liner preparation also offers the ability for the liner to conform to a selected bearing surface. Background The prior art includes various disclosures directed at bearing liners, with the goal to decrease friction and liner wear over the extended lifetime of the bearing. In particular, the goal is to reduce the level of liner wear and the levels of rotational torque that may be observed over the lifetime of the bearing, namely at relatively high oscillation cycles. In addition, the goal has been to reduce the initial rotating torque (i.e. friction) at zero cycles of wear at the start of rotation in order to reduce the relatively long break-in periods characterized by relatively high initial rotating torque. Bearing wear tests include SAE Standard AS81934 Wear Tests and AS81934 Rotational Torque evaluations. Summary A bearing including a liner comprising a woven or nonwoven fabric having a first bonding side containing a first bonding side resin composition including polymerized resin and a second sliding side having a second sliding side resin composition including polymerized resin and one or more dispersed lubricants. A bearing liner comprising a woven or nonwoven fabric having a first bonding side containing a first bonding side resin composition including partially polymerized resin and a second sliding side having a second sliding side resin composition including partially polymerized resin and one or more dispersed lubricants. The liner with the partially cured polymerized resin on both the bonding side and sliding side may then be engaged and conformed to a bearing surface and fully polymerized. 1WO 2024/147872 PCT/US2023/082449 A method for providing a bearing liner or bearing comprising providing a woven or nonwoven fabric having a first side and a second side, coating a first bonding side of the fabric with a first bonding side resin composition containing polymerizable resin and partially polymerizing. This is followed by coating a second sliding side of the fabric with a second sliding side resin composition containing polymerizable resin and one or more lubricants and partially polymerizing. This order of coating and partial polymerization may be reversed. The liner so produced may then be engaged to a bearing surface requiring a bearing liner and fully polymerized. A method for providing a bearing liner or bearing comprising providing a woven or nonwoven fabric having a first side and a second side and coating a first side of the fabric with a first bonding side resin composition containing UV polymerizable resin and partially polymerizing. This is then followed by coating a second side of the fabric with a second sliding side resin composition containing UV polymerizable resin and one or more lubricants and partially polymerizing. This order of coating and partial polymerization may be reversed. The liner so produced may then be engaged to a bearing surface requiring a bearing liner and fully polymerized. Brief Description of The Drawings FIG. 1 is an illustration of a plain weave bearing liner fabric that provides a first bonding side for engagement with a bearing and a second sliding side. FIG. 2 provides another illustration of a bearing liner farbic that provides a first bonding side for engagement with a bearing and a second sliding side. FIG. 3 is a cross sectional illustration of one example of the fabric sliding bearing liner. FIG. 4 shows another cross-sectional illustration of a preferred example of the fabric sliding bearing liner, where there is a relatively greater volume of the 1BSRC (22) relative to the 2SSRC (24). FIG. 5 shows another cross-sectional illustration of a preferred example of the fabric sliding bearing liner, wherein there is now a greater relative volume of the 2SSRC (24) to the 1BSRC (22). FIG. 6 is another cross-sectional illustration of a preferred example of a fabric sliding bearing liner, where the 2SSRC (24) rises a distance above the fabric warp fibers 16 as illustrated at 26. FIG. 7 is another cross-sectional illustration of a preferred example of a fabric sliding bearing liner wherein the weft fibers 16 protrude from the 1BSRC (22) as shown by arrow 28. 2WO 2024/147872 PCT/US2023/082449 FIG. 8 is an illustration of a test fabric piece configured for application of the polymerizable resin of the 1BSRC. FIG. 9 illustrates one non-limiting example of the application of parallel beads of polymerizable rein of the 1BSCR to the test fabric piece. FIG. 10 illustrates one non-limiting example of the use of a clipboard fabric holder for holding