Composite bearings

A technology of composite bearings and polymers, which is applied in the direction of shafts and bearings, bearing components, mechanical equipment, etc., and can solve problems such as unsuitable use

Inactive Publication Date: 2006-05-03
GLACIER GARLOCK BEARINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In some applications, the use of self-lubricating bearings containing graphite is undes...

Method used

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Examples

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example 1

[0026] Example 1 (control)

[0027]PTFE-Dacron fiber wound composite bearings (1620-11 MLG bearings manufactured by Glacier Glock, Thorofare, NJ), without PTFE particles or wetting agents, were tested on a HOT test machine using the following test conditions Test: Pressure = 4300 psi, Oscillation = 10° (total) + / - 5° (from center), Speed ​​= 200 cycles / min, Rigid Shaft Polish = 7 microinches AA and approximately 100-200 Rockwell "B" Surface hardness. This test was run as a "control standard" for approximately 90 hours, resulting in a wear depth of 0.017 inches (0.043 cm) at 1.1 million cycles.

example 2

[0029] Under the same test conditions, a HOT test was performed on a bearing having the bushing composite and construction of Example 1, but also including PTFE particles and wetting agent within the epoxy bushing, resulting in 0.007 inches (0.018cm) of wear depth.

[0030] Wetting of the PTFE particles was carried out as follows. Using an industrial "Jiffy" or "Rapid Propeller Mixer" to mix the ingredients including NADIC® Methyl Anhydride (8 kg), Teflon® #62 PTFE Fine Powder (2 kg) and TroySol TM Mixture of S366 (0.2 kg) for 10 minutes. After 24 hours, the mixture was stirred again for another 10 minutes. The resulting dispersion was stirred for an additional 15 minutes with Epon 828 epoxy resin (9 kg) and BDMA (0.2 kg). A PTFE-Dacron® fiber wound composite bearing was thus fabricated as a 1620-11 test bearing having the bushing composite and construction of Example 1, but which also included PTFE particles and wetting agent within an epoxy bushing .

[0031] Bearings ...

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Abstract

Composite bearings and methods of making composite bearings are provided in which a bushing comprising polytetrafluoroethylene fibers and a second fibrous material is disposed within a polymeric matrix comprising polytetrafluoroethylene particles and a wetting agent. Since graphite can be corrosive to carbon steel, the composite bearing can be used in hydroelectric applications where self-lubricating bearings containing graphite are undesirable.

Description

[0001] Statement of relevant application [0002] This application claims the benefit of U.S. Provisional Application No. 60 / 464,842, filed April 23, 2003, entitled " Self-lubricating Fiber Wound Composite Bearings", the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to composite bearings and methods of making the composite bearings. Background technique [0004] In many high load applications, composite bearings can be used to provide low wear rates. Composite bearings are commonly available and feature a combination of fibrous surface bushings comprising polytetrafluoroethylene and a controlled fiber weave pattern of high strength fibers disposed within a thermosetting resin or other polymer. For example, it is known to provide a thermosetting resin bearing with a bushing comprising PTFE wire and other polymeric fabrics which are adhered together to the resin and provide a low coefficient of friction for min...

Claims

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Application Information

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IPC IPC(8): F16C33/20
CPCF16C33/201
Inventor 迈克尔·R·金彭远鸿迈克尔·霍许克
Owner GLACIER GARLOCK BEARINGS
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