CN213628499U - Catenary self-aligning roller bearing - Google Patents

Abstract

The utility model discloses a catenary self-aligning roller bearing. The longitudinal section of the bearing roller adopts a catenary profile to form the catenary roller, and the longitudinal section is a section passing through the central axis of the bearing roller; the axial direction of the catenary roller has an included angle with the axial direction of the roller bearing. The utility model discloses the osculating degree of bearing has improved a lot more than drum-shaped roller in the past for catenary line self-aligning roller bearing's radial and axial bearing capacity improves, and life increases.

Description

Catenary self-aligning roller bearing

Technical Field

The utility model relates to a self-aligning roller bearing especially relates to a roller has double-row catenary self-aligning roller bearing of high density degree of tangency with bearing inner and outer lane.

Background

The self-aligning roller bearing has double-row rollers, 1 common spherical raceway on the outer ring, and 2 raceways on the inner ring and inclined at an angle relative to the bearing axis. The ingenious structure enables the bearing to have self-aligning performance, so that the bearing is not easily affected by the angle between the shaft and the bearing box seat to error or shaft bending, and the bearing can bear radial load and axial load with bidirectional action. However, the common self-aligning roller bearing has the advantages of low contact stress, low bearing capacity and short service life due to low contact degree between the roller element of the common self-aligning roller bearing and the raceways of the inner ring and the outer ring. The catenary linear roller element can realize high contact degree with the inner and outer ring raceways, the contact stress is the same in size and uniform in distribution, the radial axial bearing capacity of the self-aligning roller bearing is improved, and the service life of the self-aligning roller bearing is prolonged.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that traditional self-aligning roller bearing capacity is lower among the background art, the life-span is shorter, the utility model aims to provide a can realize roller element and the high-density degree of contact of outer lane raceway contact surface and the mild self-aligning roller bearing of contact stress.

The utility model adopts the technical proposal that:

the utility model discloses a roller bearing includes inner circle, outer lane, holder and bearing roller, the longitudinal section of bearing roller adopt the linear profile of catenary and form the catenary roller, the longitudinal section is the cross-section of crossing bearing roller the central axis.

The catenary roller is installed in double rows through the retainer.

And an included angle is formed between the axial direction of the catenary roller and the axial direction of the roller bearing.

The catenary line is represented as follows:

wherein a is a perpendicular distance from a vertex of the catenary to an abscissa axis, and the abscissa direction is parallel to the axial direction of the catenary roller.

The retainer and the bearing roller are made of metal.

The utility model discloses a catenary roller structural design makes the bearing roller respectively with roller bearing's inner circle, outer lane raceway between have high dense degree of tangency and the mild advantage effect of contact stress distribution, increased high dense degree of tangency.

The high osculation means that the contact surface between the bearing roller and the inner ring/outer ring raceway of the roller bearing is large due to deformation, the utility model discloses an increased because of deformation produce and the contact surface between the raceway.

The utility model has the advantages that:

the utility model discloses increased the tangent degree of roller element and bearing inner and outer lane raceway, and contact surface contact stress changes for a short time.

The utility model discloses a self-aligning roller bearing is because roller and raceway contact produce small meeting an emergency at the during operation, and the tangent degree that has improved roller and raceway makes the area of contact increase after the small meeting an emergency of production contact to because catenary nature, the contact stress size of contact surface is close, thereby improves the bearing capacity and the life of bearing.

Drawings

FIG. 1 is a comparison of a prior art roller element and a catenary roller profile.

FIG. 2 is a 3D wire frame diagram of a catenary roller element.

FIG. 3 is a graph comparing the contact stress of a prior art roller element with a catenary roller element with a raceway.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the roller bearing includes an inner ring, an outer ring, a cage, and bearing rollers, and the longitudinal section of the bearing rollers is a section passing through the central axis of the bearing rollers, and the longitudinal section of the bearing rollers is a catenary roller formed by a catenary profile. As shown in fig. 2, is a 3D wire frame diagram of the catenary roller elements. The profile of the longitudinal section of the catenary roller is two symmetrical catenary lines.

The density of the catenary roller, the bearing inner ring and the bearing outer ring is greatly improved compared with the traditional drum-shaped roller. Due to the properties of the catenary, the contact stress of the roller and the contact part of the inner ring and the outer ring of the bearing is close, so that the radial and axial bearing capacity of the catenary self-aligning roller bearing is improved, and the service life is prolonged.

In specific implementation, the catenary roller is installed through two rows of the retainer to form two rings of bearing rollers, and an included angle is formed between the axial direction of the catenary roller and the axial direction of the roller bearing.

The catenary line is represented as follows:

wherein a is a perpendicular distance from a vertex of the catenary to an abscissa axis, and the abscissa direction is parallel to the axial direction of the catenary roller.

The utility model discloses a theory of operation is:

in a general double-row self-aligning roller bearing, a roller element is in contact with an inner raceway and an outer raceway, and micro strain is generated during contact so that the inner raceway and the outer raceway have a certain contact area with the roller element.

The utility model discloses the concrete implementation is the linear roller element of catenary with general roller element replacement one-tenth longitudinal section profile for tangent degree between roller and the raceway improves, thereby when producing small meeting an emergency under the same effort when contacting, the area of contact of roller and raceway increases, and the contact stress of roller and raceway reduces and even under the effect of the same effort, thereby has improved self-aligning roller bearing's bearing capacity and is showing the life who has improved the bearing.

As shown in fig. 1, a comparison of the profile of a conventional drum roller element with a catenary linear roller is shown. The curvature of the longitudinal section contour line of the prior roller element is larger near the contact point of the roller and the raceway. The curvature of the profile line of the longitudinal section of the catenary roller is smaller near the contact point of the roller and the raceway. And the catenary roller contact portion contact stress is equal everywhere due to the catenary nature. The catenary roller has a higher shear and more uniform contact stress with the raceway than prior rollers.

Fig. 3 is a graph comparing the contact stress of the prior art drum roller element and the catenary roller element with the raceway. By comparing the contact stresses of the existing roller element and the catenary roller element, which are respectively in contact with the raceways under the same force, it is found that the contact stresses generated by the existing roller element have stress concentrations and are greater than the contact stresses of the catenary roller. And the catenary roller bearing has equal contact stress and smaller contact stress at the positions, and the stress concentration is smaller, so the bearing capacity is larger, and the service life is longer.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.

Claims (5)

1. The utility model provides a catenary self-aligning roller bearing, roller bearing includes inner circle, outer lane, holder and bearing roller, its characterized in that: the longitudinal section of the bearing roller adopts a catenary profile to form the catenary roller, and the longitudinal section is a section passing through the central axis of the bearing roller.

2. The catenary self-aligning roller bearing of claim 1, wherein:

the catenary roller is installed in double rows through the retainer.

3. The catenary self-aligning roller bearing of claim 1, wherein:

and an included angle is formed between the axial direction of the catenary roller and the axial direction of the roller bearing.

4. The catenary self-aligning roller bearing of claim 1, wherein:

the catenary line is represented as follows:

wherein a is a perpendicular distance from a vertex of the catenary to an abscissa axis, and the abscissa direction is parallel to the axial direction of the catenary roller.

5. The catenary self-aligning roller bearing of claim 1, wherein:

the retainer and the bearing roller are made of metal.

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