Dual-rate surface effect dampers

Details Dual-rate surface effect dampers Dual-rate surface effect dampers

1991-12-20

1993-02-02

Butler, Douglas C.

Brakes

Frictional vibration damper

188129, 188268, 188382, 267134, 267182, F16F 708

Patent

active

051831376

ABSTRACT:
A dual-rate surface effect damper with extended useful life. The dual rate is provided by two cylindrical liners which have different inner diameters which engage a damping piston having protrusions which have an interference fit with the liner. Features which extended life include heat dissipative elements such as internal and external fins, a convective heat transfer path for cooling air through the piston and a lubricant of MoS.sub.2 dispersed in a Teflon.RTM.-filled flurosilicone. Maintaining the temperature of the elastomer below about 200.degree. F. (93.3.degree. C.) is critical to avoiding thermal breakdown. In addition, the elastomer and metallic surfaces can undergo a surface treatment to reduce their tendency to abraid and to cause abrasion, respectively.

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Bhushan, Bharat & B. K. Gupta, "Handbook of Tribology", .COPYRGT.1991, McGraw-Hill, pp. 5.12-5.15, 5.21, 5.22, 5.25, 5.29, 5.32-5.36.

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