HIGH-CYCLE, SHORT RANGE-OF-MOTION LINKAGE APPARATUS FOR GAS TURBINE ENGINE APPLICATIONS

摘要

A high-cycle, short range-of-motion linkage apparatus (33) is provided for actuation of a positioning device. The linkage apparatus (33) includes a pivot member (26) having a stem (30)extending therefrom, a positioning member (32)including a receiving portion (31) into which the stem (30) is removably secured, and at least one spherical plain bearing (12, 14) secured to the pivot member. The spherical plain bearing has an inner member (12) having an outer engagement surface and a bore (16) extending at least partway therethrough, an outer member (14)positioned at least partially around the inner member (12), the outer member (14) having an inner engagement surface contoured to a shape complementary to the outer engagement surface of the inner member (12), and a liner disposed between the inner engagement surface of the outer member (14) and the outer engagement surface of the inner member (12), the liner comprising polytetrafluoroethylene and a phenolic resin reinforced with aramid fibers.