CN114001090A

CN114001090A - Cylindrical roller bearing

Info

Publication number: CN114001090A
Application number: CN202111400628.7A
Authority: CN
Inventors: 刘璐; 李月; 李海涛; 徐超; 孙志强; 李晓天; 刘冰冰; 王涵; 谷守旭; 毛青丽
Original assignee: AVIC Harbin Bearing Co Ltd
Current assignee: AVIC Harbin Bearing Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-02-01

Abstract

The bearing comprises an outer ring, an inner ring and a plurality of rolling bodies, wherein an outer ring raceway of the outer ring and an inner ring raceway of the inner ring are both processed into circular arcs, the circular inner surface of the outer ring raceway faces one side of the outer ring, the circular inner surface of the inner ring raceway faces one side of the inner ring, each rolling body is in a waist drum shape, and the plurality of rolling bodies are all arranged between the outer ring raceway of the outer ring and the inner ring raceway of the inner ring. Belongs to the field of bearings.

Description

Cylindrical roller bearing

Technical Field

The invention relates to a bearing, in particular to a retainer-free anti-deflection cylindrical roller bearing, and belongs to the field of bearings.

Background

The conventional cylindrical roller bearing is generally divided into four parts, namely an inner ring, an outer ring, a rolling body and a retainer, mainly bears radial force, cannot bear axial force, has a high requirement on the coaxiality of the outer ring and the inner ring, has low deflection resistance under the working condition of misalignment, and is very easy to cause the rolling body to be blocked or peeled off, so that faults are caused.

Disclosure of Invention

The invention provides a cylindrical roller bearing in order to solve the problem that the conventional cylindrical roller bearing is insufficient in deflection resistance.

The technical scheme adopted by the invention is as follows:

the rolling element structure comprises an outer ring, an inner ring and a plurality of rolling elements, wherein an outer ring raceway of the outer ring and an inner ring raceway of the inner ring are both processed into circular arcs, the circular arc inner surface of the outer ring raceway faces one side of the outer ring, the circular arc inner surface of the inner ring raceway faces one side of the inner ring, each rolling element is waist drum-shaped, and the plurality of rolling elements are all arranged between the outer ring raceway of the outer ring and the inner ring raceway of the inner ring.

Has the advantages that:

the outer ring raceway and the inner ring raceway of the cylindrical roller bearing are both processed into outwards convex circular arcs, the middle diameter of the rolling element is smaller than the waist drum shape of the diameters of the two sides, and the original linear contact is converted into the elliptical contact when the cylindrical roller bearing is used, so that the cylindrical roller bearing can bear a small amount of axial force. The bearing improves the deflection resistance of the cylindrical roller bearing, solves the problem of the misalignment condition of the main shaft bearing, optimizes the stress distribution of the rolling bodies, ensures uniform stress of the rolling bodies, improves the bearing capacity of the cylindrical roller bearing, and ensures that the tightness degree of the radius of the circumferential curved surface of each rolling body 3 and the radius of the outer ring raceway or the radius of the inner ring raceway is 0.977-0.983. Through the design of the gland with the locking point, the bearing is guaranteed to be flexibly detached, and meanwhile, the running stability of the cylindrical roller bearing is improved.

Drawings

FIG. 1 is a schematic structural view of a cylindrical roller bearing;

Detailed Description

The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and the cylindrical roller bearing according to the present embodiment includes an outer ring 1, an inner ring 2, and a plurality of rolling elements 3, where an outer ring raceway of the outer ring 1 and an inner ring raceway of the inner ring 2 are both processed into circular arcs, a circular arc inner surface of the outer ring raceway faces one side of the outer ring 1, a circular arc inner surface of the inner ring raceway faces one side of the inner ring 2, and a convex curved surface design of the outer ring raceway and the inner ring raceway can ensure a certain degree of contact with a curve of a generatrix of the rolling elements, so that an original linear contact is converted into an elliptical contact, and the cylindrical roller bearing can bear a small amount of axial force. The inner ring raceway has a certain self-aligning function, when the bearing is in an misalignment working condition, the bearing ensures uniform stress and stable operation of the rolling body, the maximum misalignment angle which can be borne by the bearing is related to the width of the inner ring raceway and the diameter of a spherical surface, and when the width is fixed, the larger the diameter of the spherical surface is, the smaller the angle is. The shape of each rolling body 3 is a waist drum shape with the middle diameter smaller than the diameters of two sides, two end faces of each rolling body 3 are respectively provided with a spherical groove 3-1, the rolling bodies 3 are all arranged between an outer ring raceway of an outer ring 1 and an inner ring raceway of an inner ring 2, and the tightness degree of the radius of the circumferential curved surface of each rolling body 3 and the radius of the outer ring raceway or the radius of the inner ring raceway is 0.977-0.983.

The second embodiment is as follows: the present embodiment is described with reference to fig. 1, and the cylindrical roller bearing according to the present embodiment further includes a plurality of glands 4, each gland 4 is a circular plate, a through hole is formed in a central position of the circular plate, a plurality of cylinders are annularly mounted on a lower surface of the circular plate, the cylinders and the circular plate are integrated, outer ends of the cylinders are spherical, each gland 4 is mounted on one end surface of the outer ring 1, a spherical end of the cylinder on the lower surface of each gland 4 is in rolling contact with a spherical groove 3-1 of each rolling element 3, due to the arrangement, on one hand, the detachability of the bearing is ensured, and on the other hand, the spherical end of the cylinder of the gland 4 is designed to be in rolling contact with the spherical groove 3-1 of the rolling body 3 as a locking point, so that a certain guiding effect is formed, and the running stability of the rolling body is maintained; the rest is the same as the first embodiment.

The third concrete implementation mode: referring to fig. 1, the present embodiment is described, and the number of the glands 4 is 2, 2 glands 4 are respectively fixedly mounted on the left and right sides of the outer ring of the present embodiment, and the rolling elements are fixed by the spherical end of the cylinder on the lower surface of the gland 4 being in rolling contact with the spherical groove 3-1 of the rolling elements, which is the same as the first or second embodiment.

The fourth concrete implementation mode: in the present embodiment, the maximum diameter of the inner ring 2 is smaller than the diameter of the through hole of the gland 4, but the present invention is not limited to the above, and the diameter of the through hole of the gland 4 may be larger than the diameter of the inner ring 2, and the rest of the embodiments are the same as those of the first, second, or third embodiments.

The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1, and a cylindrical roller bearing according to the present embodiment can bear a non-centering condition of 15 ° at maximum and can bear an axial force of about 10% of a radial force, taking a certain type of bearing with an inner diameter of 40mm and an inner ring width of 30mm as an example; through simulation analysis and measurement, the service life of the bearing is longer than 10000 hours under the working condition of 30000 r/min. The application of the bearing improves the deflection resistance of the cylindrical roller bearing, solves the problem that the main shaft bearing is not in a centering working condition, optimizes the stress distribution of the rolling bodies, and improves the bearing capacity of the cylindrical roller bearing, and the other embodiments are the same as the first embodiment, the second embodiment, the third embodiment or the fourth embodiment.

Claims

1. The utility model provides a cylindrical roller bearing, it includes outer lane (1), inner circle (2) and a plurality of rolling element (3), its characterized in that: the outer ring raceway of the outer ring (1) and the inner ring raceway of the inner ring (2) are both processed into circular arcs, the circular arc inner surface of the outer ring raceway faces one side of the outer ring (1), the circular arc inner surface of the inner ring raceway faces one side of the inner ring (2), each rolling element (3) is waist drum-shaped, and the plurality of rolling elements (3) are all arranged between the outer ring raceway of the outer ring (1) and the inner ring raceway of the inner ring (2).

2. A cylindrical roller bearing according to claim 1, wherein: the end faces of the two ends of each rolling body (3) are respectively processed with a spherical groove (3-1).

3. A cylindrical roller bearing according to claim 2, wherein: the contact ratio of the radius of the circumferential curved surface of each rolling body (3) and the radius of the outer ring raceway or the radius of the inner ring raceway is 0.977-0.983.

4. A cylindrical roller bearing according to claim 3, wherein: the novel rolling bearing further comprises a plurality of glands (4), each gland (4) is a circular plate body, a through hole is machined in the center of each circular plate body, a plurality of cylinders are annularly installed on the lower surface of each circular plate body, each cylinder and each circular plate body are integrated, the outer end of each cylinder is spherical, each gland (4) is installed on one end face of the outer ring (1), and the spherical end of each cylinder on the lower surface of each gland (4) is in rolling contact with the spherical groove (3-1) of each rolling body (3).

5. The cylindrical roller bearing as claimed in claim 4, wherein: the number of the pressing covers (4) is 2.

6. The cylindrical roller bearing as claimed in claim 5, wherein: the maximum diameter of the inner ring (2) is smaller than the diameter of the through hole on the gland (4).