RU2509235C1 - Single-row spherical roller frictionless bearing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: single-row spherical roller frictionless bearing comprises an external ring (1) with a rolling path, an inner ring (2) with a rolling path, conical rolling bodies (3) and a separator for separation of rolling bodies. The rolling path of the external ring (1) is made toroidal, and the rolling path of the internal ring (2) is made spherical. Rolling bodies (3) have a concave profile coupled with rolling paths of rings (1, 2). The centre of the sphere of the rolling path of the internal ring (2) of the bearing is displaced relative to its centre of gravity along the longitudinal axis depending on combination of radial and axial components of the external load acting at the bearing.

EFFECT: expanded range of application of design of a roller frictionless bearing by means of its usage as different types of bearings - radial, radial-thrust, thrust-radial or thrust.

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Description

The invention relates to spherical rolling bearings and is intended to maintain shafts and axles in space, providing them with the possibility of rotation or swing and the perception of the loads acting on them.

Known single-row tapered angular contact rolling bearing, containing the outer and inner rings with conical raceways, conical rolling bodies in the form of rollers, the surface of which is associated with the raceways of the outer and inner rings of the bearing, and a separator for separating rolling bodies. The bearing simultaneously accepts significant radial and one-sided axial loads (GOST 3359-89. Rolling bearings. Types and design. - M .: Publishing house of standards, 1989. - P.45, type 7000).

The disadvantage of the bearing is the limited range of applications in the conditions of perception of loads of long and flexible shafts, because the bearing does not allow a significant skew of the outer and inner rings.

A single-row spherical roller bearing is known, comprising an outer ring with a toroidal raceway, an inner ring with a spherical raceway, conical rolling bodies with a concave profile mated to raceways, a separator for separating rolling bodies. The bearing perceives mainly axial and insignificant radial load (patent for utility model RU 96403, IPC F16C 19/22 (2006.01), F16C 19/34 (2006.01), F16C 23/08 (2006.01), F16C 33/36 (2006.01); Publ. 07/27/2010, bull. No. 21).

The main disadvantage of this bearing is the limited scope due to the perception of mainly axial load during operation and insignificant radial, which leads to low carrying capacity at the inability to perceive various combinations of radial and axial components of the load acting on the bearing.

The objective of the invention is to expand the range of application of the design of the roller bearing by its use as various types of bearings - radial, or angular contact, or axial-radial, or axial, in particular, due to the increase of load capacity in the radial direction.

The problem is solved in that in a single row spherical roller bearing containing an outer ring with a toroidal raceway, an inner ring with a spherical raceway, tapered raceways with a concave profile mated to raceways, a separator for separating rolling bodies, according to the invention, the center of the sphere the raceway of the inner ring of the bearing is offset relative to its center of gravity along the longitudinal axis depending on the combination of the radial and axial components of the external load, acting on the bearing.

This design allows you to significantly expand the range of its application due to the preset shift of the center of the sphere of the raceway of the inner ring of the bearing along the longitudinal axis of the bearing relative to its center of gravity and, as a result, to ensure the perception of a different combination of radial and axial components of the load acting on the bearing during its operation . Thus, it is possible to use it as a different type of bearing - radial, radial thrust, thrust radial or thrust.

The proposed invention is illustrated in the drawing, where figure 1 shows a cross section of a single row spherical roller bearing , perceiving both axial and radial components of the load; figure 2 is a cross section of a single row spherical roller bearing, perceiving mainly radial and minor axial component of the load. In this case, FIGS. 1 and 2 show various combinations of the axial radial components of the calculated external loads acting on the bearing and determining the corresponding position of the center of the sphere of the raceway of the inner ring of the bearing on its longitudinal axis.

In addition, the drawings further indicate the following:

- F _a - axial component of the external load acting on the bearing:

- F _r is the radial component of the external load acting on the bearing;

- F - the resultant external load acting on the bearing;

- O is the center of the sphere of the raceway of the inner ring of the bearing;

- R _SF - the radius of the sphere of the raceway of the inner ring of the bearing.

Single row spherical roller bearing contains outer ring 1 with raceway, inner ring 2 with raceway, conical rolling elements 3, a separator for separating rolling bodies (not shown). The outer ring 1 is installed in the housing (not shown in the drawing).

The raceway of the outer ring 1 is made toroidal, the raceway of the inner ring 2 is made spherical. The rolling elements 3 have a concave profile, coupled with the raceways of the bearing rings.

The center O of the raceway sphere of the inner ring 2 of the bearing is offset from its center of gravity along the longitudinal axis of the bearing depending on the combination of the radial F _r and axial F _a components of the external F load acting on the bearing.

Single row spherical roller bearing operates as follows. When the shaft rotates, the inner ring 2 of the bearing rotates together with it, entraining the rotation of the rolling body 3 in contact with the outer ring 1 installed in the housing. The load acting on the shaft is transferred to the housing. By fixing the position of the shaft relative to the housing, the bearing ensures its free rotation, and the sliding of the rolling bodies 3 along the spherical track of the inner ring 2 of the bearing eliminates pinching of the rolling bodies 3 in case of shaft deformation under load.

Claims (1)

Single row spherical roller bearing comprising an outer ring with a toroidal raceway, an inner ring with a spherical raceway, tapered raceways with a concave profile mating with raceways, a separator for separating raceways, characterized in that the center of the raceway sphere is the inner race of the bearing offset from its center of gravity along the longitudinal axis, depending on the combination of the radial and axial components of the external load acting on the bearing.

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