CN211202609U

CN211202609U - High-speed ball bearing adopting special-shaped spacer to replace retainer

Info

Publication number: CN211202609U
Application number: CN201921068582.1U
Authority: CN
Inventors: 潘承怡; 曹冠群; 赵彦玲
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-08-07
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a high-speed ball bearing adopting a special-shaped isolator to replace a retainer, which comprises a bearing outer ring, a bearing inner ring, spherical rolling bodies and isolators, wherein the isolators are distributed in an approximate triangular gap formed by any two adjacent spherical rolling bodies and the bearing inner ring, the isolators are contacted with the two spherical rolling bodies and have a certain gap with the bearing inner ring, the quantity of the isolators is the same as that of the spherical rolling bodies, the isolators play a role of replacing the retainer in the traditional bearing, rolling friction is generated between the isolators and the spherical rolling bodies, the calorific value is far smaller than that generated by friction collision between the retainer and the spherical rolling bodies in the traditional bearing, thereby the bearing performance is greatly improved compared with the traditional bearing with the retainer, the limit rotating speed and the friction performance of the high-speed electric main shaft bearing in China can be improved, and the processing and transformation can be carried out on, easy to realize standardized manufacture, low cost and good interchangeability.

Description

High-speed ball bearing adopting special-shaped spacer to replace retainer

Technical Field

The utility model relates to a bearing application under high speed and hypervelocity specifically is a high-speed ball bearing of new construction that adopts special-shaped isolator to replace holder suitable for various electricity main shaft, high-grade digit control machine tool, motor, aeroengine etc..

Background

The high-grade numerical control machine tool technology is one of the important development targets that "the china is made 2025" and the electricity main shaft is the key part that influences the digit control machine tool performance, along with electricity main shaft to speed requirement improve gradually, also more and more high to the high-speed performance requirement of bearing, but the bearing performance reduction or the very big influence of failure that leads to that the bearing generates heat the extreme speed of bearing, wherein the sliding friction between bearing retainer and the rolling element is the main factor that arouses the bearing to generate heat, consequently the utility model discloses high-speed ball bearing adopts special-shaped isolator to replace retainer new construction, improves the extreme speed and the frictional property of high-speed electricity main shaft bearing of china to can carry out processing transformation on current bearing basis, easily realize standardized manufacturing, with low costs, interchangeability is good.

Disclosure of Invention

The utility model aims at: the high-speed ball bearing adopting the special-shaped isolator to replace the retainer is provided, so as to meet the increasing requirements of the national on the limit rotating speed and the friction performance of the high-speed electric main shaft bearing;

in order to achieve the above purpose, the technical scheme of the utility model is as follows:

a high-speed ball bearing adopting a special-shaped isolator to replace a retainer comprises a bearing outer ring, a bearing inner ring, a spherical rolling body and an isolator, wherein the bearing outer ring and the bearing inner ring are coaxially arranged, and the inner side of the bearing outer ring and the outer side of the bearing inner ring are both provided with raceways for axially positioning the spherical rolling bodies, the spherical rolling bodies are spheres and are uniformly distributed between the bearing inner ring and the bearing outer ring along the circumferential direction, the two ends of the isolating body are cylinders, the middle part of the isolating body is a revolving body which is connected with the cylindrical surfaces at the two ends of the isolating body and is formed by an inward concave special curve around the axis of the isolating body, the isolating body and the rolling bodies are arranged at intervals and are positioned in a gap between any two adjacent spherical rolling bodies and the bearing inner ring, when the rolling bearing works, the isolating bodies are in rolling contact with the two spheres and have certain gaps with the inner ring of the bearing, and the number of the isolating bodies is the same as that of the spherical rolling bodies;

according to another embodiment of the present invention, the bearing outer ring and the bearing inner ring may be any deep groove ball bearing or angular contact ball bearing of the same specification;

according to another embodiment of the present invention, further comprising that the special curves in the revolved body formed by the inward concave special curves around the axis of the isolated body, which are connected with the cylindrical surfaces at both ends of the isolated body, are the same in the same type of bearing, and the isolated body curves of different types are circular arc lines, hyperbolic curves, involute curves, V-shaped lines or partial elliptic lines;

according to another embodiment of the present invention, it further comprises that the number of the spacers is the same as the number of the spherical rolling elements;

the utility model has the advantages that: the utility model provides an adopt high-speed ball bearing of dysmorphism isolator replacement holder, through introduce the dysmorphism isolator between each ball rolling element and removed original holder, the slip friction and the collision of holder and bearing rolling element have been eliminated, the isolator has simultaneously undertaken the effect that former holder separates ball rolling element mutually, because the isolator can the rotation, thereby the friction that produces between isolator and the ball rolling element is rolling friction, calorific capacity that rolling friction produced is far less than the calorific capacity that sliding friction produced between former holder and the rolling element, thereby can improve the limit speed and the frictional behavior of bearing, because again the utility model discloses can process the transformation on current bearing basis, easily realize standardized manufacturing, with low costs, interchangeability is good.

Drawings

FIG. 1 is a front view of the bearing of the present invention during its operation;

FIG. 2 is a sectional view and a partial enlarged view of the bearing of the present invention taken along the line A-A;

FIG. 3 is a sectional view taken along line B-B of the bearing of the present invention during its operation;

FIG. 4 is a sectional view of the bearing of the present invention at rest and a partial enlarged view of the shortest distance between two adjacent balls of the rolling element;

FIG. 5 is a cross-sectional view of the bearing of the present invention at rest, taken along line C-C;

FIG. 6 is a schematic view of the separator of the present invention;

wherein: 1 bearing outer ring, 2 bearing inner ring, 3 spherical rolling body and 4 isolating body.

Detailed Description

As shown in fig. 1, a high-speed ball bearing using a special-shaped spacer instead of a cage is characterized in that: the bearing comprises a bearing outer ring (1) and a bearing inner ring (2) which is coaxial with the bearing outer ring (1), wherein a certain number of spherical rolling bodies (3) and isolating bodies (4) with the same number as the spherical rolling bodies (3) are filled between the bearing outer ring (1) and the bearing inner ring (2), and the isolating bodies (4) are positioned between gaps formed by any two adjacent spherical rolling bodies (3) and the bearing inner ring (2); as shown in fig. 2, when the high-speed ball bearing works, the isolating body (4) is positioned on the raceway of the bearing inner ring (2) and has a certain gap with the bearing inner ring (2); as shown in fig. 3, the minimum diameter of the isolating body (4) is tangent to the adjacent spherical rolling body (3) and has a gap with the raceway on the bearing inner ring (2), and the specific working mode is as follows: the bearing outer ring (1) is fixed, the bearing inner ring (2) rotates at a high speed, the bearing inner ring (2) drives the spherical rolling bodies (3) to rotate, the spherical rolling bodies (3) drive the isolating bodies (4) to rotate around the axis of the bearing, the isolating bodies (4) are completely separated from the bearing inner ring (2) due to centrifugal action, meanwhile, the diameter of the minimum diameter part of each isolating body (4) is larger than the minimum clearance of two adjacent spherical rolling bodies (3), so that the isolating bodies are still positioned in an approximately triangular area formed between the two adjacent spherical rolling bodies (3) and the bearing inner ring (2), the contact speed of the two adjacent spherical rolling bodies (3) and the isolating bodies (4) is the same due to the fact that the autorotation speeds of the two adjacent spherical rolling bodies (3) are approximately the same, and the isolating bodies (4) are gyrorotors, so that rolling friction can be formed between the two adjacent, when the bearing runs stably from start to bearing steady operation, the isolator (4) starts accelerating rotation due to friction between the spherical rolling body (3) and the isolator (4), when the linear speed of the contact part of the isolator (4) and the spherical rolling body (3) is equal, the self-rotation speed of the isolator (4) is stable due to the property of friction force, and stable rolling friction is formed between the isolator (4) and the spherical rolling body (3), so that harmful friction in the bearing is reduced, the heat productivity of the bearing is reduced, and the limit rotating speed of the bearing is improved; as shown in fig. 4, when the bearing is placed statically, the spherical rolling bodies (3) and the isolating bodies (4) are gathered downwards due to the action of gravity, at the moment, the middle parts of the lower isolating bodies (4) are tangent to the adjacent spherical rolling bodies (3), and meanwhile, the two ends of the isolating bodies (4) are also contacted with the bearing inner ring (2); as shown in fig. 5, the shortest distance between two adjacent spherical rolling bodies (3) is smaller than the minimum diameter of the isolating body (4), and the isolating body (4) is limited by the two adjacent spherical rolling bodies (3) and cannot be separated from the area formed by the two adjacent spherical rolling bodies (3) and the bearing inner ring (2); as shown in FIG. 6, the two side parts of the insulating body (4) are cylinders, the middle part is a revolving body formed by the rotation of an inwards concave special curve connected with the cylindrical surfaces at the two ends of the insulating body around the axis of the insulating body, and the insulating body (4) is symmetrical about the circular section of the position of the minimum diameter of the middle part.

Claims

1. The utility model provides an adopt high-speed ball bearing of special-shaped isolator replacement holder which characterized in that: the spherical rolling bodies (3) are mutually isolated by using a special-shaped isolating body (4) to replace the function of a traditional retainer, the two side parts of the isolating body (4) are cylinders, the middle part of the isolating body is a revolving body formed by the rotation of an inwards concave special curve connected with the cylindrical surfaces at the two ends of the isolating body around the axis of the isolating body, the isolating body (4) is symmetrical about the circular section of the minimum diameter position of the middle part, the working position of the isolating body (4) is positioned in an approximately triangular area enclosed by two adjacent spherical rolling bodies (3) and a bearing inner ring (2), and when the bearing stops and operates, the minimum distance between the two adjacent spherical rolling bodies (3) is smaller than the minimum diameter of the isolating body (4).

2. A high speed ball bearing using a shaped spacer in place of a cage according to claim 1, further characterized in that: the special curve used for forming the solid body by the middle section of the isolating body through rotation can be a circular arc line, a hyperbolic curve, an involute, a V-shaped line or a partial elliptic line.