Abstract A preloaded bearing assembly for use between two concentric and relatively rotatable members (such as the main shafts in gas turbine engines) which are also liable to axial movement relative to each other. The bearing has two rows of ball-elements with their respective races. The outer race of the first row is fixed, while the inner races of both rows are part of a common carrier member which rotates with the inner of the concentric members but is free to slide axially on it. The outer race of the second row is slidingly located on the outer concentric member and is spring-loaded in the direction of the outer race of the first row. This pre-load acts to prevent skidding of the bearings because the loading is transferred through the second row balls to the carrier member and back through the first row balls tothe fixed race.
A two-row preloaded ball bearing assembly for use between first and second relatively rotating concentric members which are also liable to move axially relative to each other, said bearing assembly having: a first bearing row race fixedly mounted on said first concentric member, a second row race axially spaced from said first row race and mounted on said first concentric member, said second row race being axially slideable thereon within limits and axially preloaded towards the first row, and a common annular race-carrier member mounted on said second concentric member and adapted to carry first and second row races opposing those aforementioned, said carrier membeR having means securing it against rotation relative to said second concentric member but allowing axial sliding thereon, and said common annular race-carrier member having radially projecting axially extending dogs which mesh with corresponding splines on the second concentric member to ensure rotation of the carrier therewith without restraining relative axial movement therebetween.
Claim 2
Dependent Claim
157 words
A two-row preloaded ball bearing assembly for use between first and second relatively rotating concentric members which are also liable to move axially relative to each other, said bearing assembly having: a first bearing row race fixedly mounted on said first concentric member, a second row race axially spaced from said first row race and mounted on said first concentric member, said second row race being axially slideable thereon within limits and axially preloaded towards the first row, and a common annular race-carrier member mounted on said second concentric member and adapted to carry first and second row races opposing those aforementioned, said carrier membeR having means securing it against rotation relative to said second concentric member but allowing axial sliding thereon, and said common annular race-carrier member having radially projecting axially extending dogs which mesh with corresponding splines on the second concentric member to ensure rotation of the carrier therewith without restraining relative axial movement therebetween.
Claim 3
Dependent Claim
40 words
A bearing assembly according to claim 1 in which the preload on the second row race is applied by a spring device comprising at least one Belville washers acting between an abutment on the first concentric member and the race.