Исследование работоспособности гибридных подшипников качения разных конструкций в ожидаемых условиях эксплуатации

Abstract

This article presents results of hybrid bearings tests (steel rings, ceramic rolling elements Si3N4) in service conditions on the aircraft engine. There has been described two types of angular bearings 126126 (130x200x33 mm) and 126206 (30x62x16 mm), and two types of roller bearings HCN1006-K-M1SP (30x55x13 mm) and HCN1010KM1SP (50x80x16 mm). The tests have been carried out on bearings test rigs in Central Institute of Aviation Motors (CIAM). Test results have been shown that the hybrid bearing 126126 is suitable for use at speed index dmpn up to 3,5*1000000 mm*rpm. Has been performed comparative test of 126206 bearings with skewing of 10` and 20` minutes. Temperatures in hybrid bearing are less than in all steel bearing. Hybrid roller bearings have been analyzed on the test rig to confirm their efficiency in helicopter gearbox. Roller bearings have been also tested with defects at two rollers, and have been developed diagnostics indicators.