8/7/2019 NEW CLASSES OF ROLLING BEARINGS WITH NEW WORKING PRINCIPLES. Rezmires Daniel etc

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ROTRIB10The 11th International Conference on Tribology

November 4-6, 2010, IAI, ROMANIA

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NEW CLASSES OF ROLLING BEARINGS

WITH NEW WORKING PRINCIPLES

Rezmires Daniel1)

, Bocanet Vasile1)

, Monfardini Alfredo2)

,Racocea Cristina

3)and Racocea Cezar

3)

Key words: rolling bearings, new class of ball bearing, new working

principles

ABSTRACT

Under the effect of a single radial load the rolling bearings (slewing rings)

transmits the external load in a region less than 180 degrees, if the radial clearance

exists. To improve the bearing capacity a new solution is proposed. The purpose of this

paper is to describe a new class of rolling bearing which assure an 0 to 360 degrees

load repartition, if a single radial load act on the mechanical structure. Usually thenormal rolling bearings contains one or more rows of rolling elements which turns

between two or more rings. The main elements of new classes of bearings arepresented in Figure 1b. comparative with a classical solution Figure 1a. The bearing

contains a body 1 (see Figure 1b) with 3 regions 1a, 1b and 1c which assure the inner

and outer frontier of the bearing, an intermediary ring 2 and rows of rolling elements

disposed between the body 1 and body 2 frontiers. These regions 1a, 1b and 1c can be

machined as a single piece or can be assembles to assure a single rigid body creating an

inner-outer ring. The intermediary element 2 assure the load transmission in a area withan angle of 0 to 360 degrees when a radial load act.

Fig.1a - Classical solution of rolling bearing Fig.1b - New solution of rolling bearing

The quasi-static and quasi-dynamic analysis is made using the centre mass

displacement of rolling element and the structure Jacobian matrix applied to a SSRB

1) S.C Sirca S.A. Piatra Neamt2)

S.C. Rima Spa Italy3) Technical University Gheorghe Asachi of Iasi

8/7/2019 NEW CLASSES OF ROLLING BEARINGS WITH NEW WORKING PRINCIPLES. Rezmires Daniel etc

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New Classes of Rolling Bearings With New Working Principles

Rezmires Daniel, Bocanet Vasile, Monfardini Alfredo, Racocea Cristina and

Racocea Cezar

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structure [1]. To create a 5dll quasistatic analysis the raceway curvature centres and the

displacement vector are presented in fig. 2 (for a particular case) in IOE, IRR and

ORR cases [2]. The inner-outer ring and the intermediary ring can create 10 new

classes of rolling bearings with the schemas presented in figure 2. A complete analysis

shows 11 (10 machined +1) analysis case.

Fig.2 - Elements necessary to 5 DLL analysis

The new working principle assures a load distribution in a region of 0 to 360 degrees,

which implies advantages regarding the bearing life growing, the miniaturizing

process (Fig.3), increasing rotation speeds and also in the increasing external loads.

Fig.3. Miniaturizing example

REFERENCES

[1] Rezmiers Daniel - Research about Dynamics and Kinematics Optimization of theSpherical Roller Bearings, Iasi, 2003 - Romania

[2] Rezmires D., Vasile Bocne, Alfredo Monfardini, - Considerations on design tennew classes of rolling bearings and new working principles, AXIV-a Conferintainternationala de inventica Cercetari si tehnologii inovative performante, June 9-

11, 2010, Jassy, Romania, p.426-431