SU752065A1 - Rolling-contact bearing - Google Patents

Description

When the bearing is rotated under the narpjs, the latter is warranted in the new roller with 3 rollers, loaded into its iccine. Due to the hollowness of the rollers, and consequently, the nf deformability of the load is distributed simultaneously to several rollers, which eliminates the slippage of the latter, both due to the increased driving force — the traction force at the contact points and the raceways of the subunit, and by reducing the inertial forces — forces, mass-dependent rollers, which in hollow cores decrease significantly.

Theoretical and experimental studies have given a number of dependencies that allow the design of roller holders of the proposed design to determine for a given load the hollowness of the rollers, their number in the section, preload and total force on the thin-walled rollers. The main one, which evaluates the dangerous tensile flexural stresses on the inner contour of the roller, is

 2 ../ (

where E is the modulus of elasticity;

IB is the vertical deformation of the roller along the linac action load;

С - hollowness coefficient; K.1 is a dimensionless parameter depending on the coefficient of hollowness;

.p.- roller diameter (outer). The coefficient of hollowness is determined by the dependence

(DBN

where yvi is the inner diameter of the roller; JH - broken diameter of the roller. The studies were carried out on an experimental stand. The number of rollers in the section varied from two to seven. Evaluation of the degree of slippage of a set of rollers with a separator relative to the inner ring was made according to the coefficient of slippage

sf

.R

where ls.r. and Lo.f. - respectively, the theoretical (calculated) and measured (actual) speeds of the rotation of the separator.

The obtained research results allowed to establish the above proportional dependence of the wall thickness of the rollers in the sections and their number, as well as the wall thickness of the thin-walled and thick-walled rollers and in the set.

In the proposed roller bearing, the elimination of the slippage phenomenon is solved in a complex way - by influencing the main factors on which it depends. This is, on the one hand, measures to increase the momentum of the driving forces, on the other hand, to reduce the moment of the braking forces, with the possibility of calculating and choosing for a given load and speed the optimal parameters ensuring an increased operation of high-speed roller bearings.

The proposed design makes it possible to improve the load distribution over the rolling bodies, as well as the thermal conditions and lubrication

rubbing elements due to the increased cooling surface, and by creating better conditions for the flow of lubricant through the liner.

Claims (2)

1. A rolling bearing containing inner and outer rings, hollow rollers with the same wall thickness, mounted with a tension between the rings, that is, with the aim of raising the p1; reliability and durability of the bearing; . 2. Bearing item 2, characterized in that the length of the arcs of each section is 0.1-0.3 of the length of the entire circumference one of the rings. Sources of information taken into account in the examination 1. US Patent No. 3765071, cl. In 23P 11/00, publ. 10/16/73 (prototype).