CN101985955B - Fretting Flexible Rolling Bearings - Google Patents

Abstract

A fretting flexible rolling bearing, in the single-row, double-row or multi-row inner ring (2) and outer ring (3), the inner ring (2) and/or outer ring (3) of each row and the rolling body (5 ) is provided with a raceway ring (1), the raceway surface (1A) of the raceway ring (1) is in contact with the rolling body (5) and matched, and the non-raceway surface (1B) of the raceway ring (1) is in contact with The arc groove (2A or 3A) on the inner ring (2) or outer ring (3) is in contact with each other; the edge of the arc groove (2A or 3A) on the inner ring (2) or outer ring (3) is embedded with a stop ring (4); the gap space between the rolling element (5), the raceway ring (1) and the arc groove (2A or 3A) is filled with lubricating grease. This kind of rolling bearing has strong adaptability to complex load conditions, high transmission stability and precision, low contact stress and long service life.

Description

Fretting Flexible Rolling Bearings

technical field

The invention relates to mechanical transmission bearings.

Background technique

Bearings are the core components that support rotating shafts and loads. From micron-level bearings supporting MEMS transmission shafts to meter-level bearings supporting giant hydroelectric generator shafts, they are widely used in various military and civilian electromechanical equipment. The academic basis of the bearing is: in service, the bearing bears the rotating torque and bending moment from the shaft or the support, and forms a complex random dynamic axial force and radial force on the raceway of the inner or outer ring of the bearing; and through the roller The contact with the raceways of the inner and outer rings combines the effect of lubrication to reduce wear, reduce temperature rise and noise, and strive to transmit the random dynamic load of rotating parts smoothly and efficiently.

The development of bearing technology in the world has undergone a change from sliding to rolling: sliding bearings have a large contact area and large transmission capacity, but the friction area is large, the friction loss is large, the transmission efficiency is low, and wear and temperature are prone to occur in the case of poor lubrication. liter failure, short life. Rolling bearings have natural advantages in structure and working principle, small contact area, small friction loss, and high transmission efficiency; but due to large contact stress, contact peeling and temperature rise failure are prone to occur under poor lubrication conditions; from increasing the contact area From the perspective of improving bearing capacity, rolling bearings develop towards multi-row, cylindrical and needle roller bearings; from the perspective of realizing axial load bearing, rolling bearings develop towards deep groove ball bearings, tapered roller bearings and axial thrust bearings. With the improvement of load capacity and performance, rolling bearings have widely replaced sliding bearings.

The key factors affecting the bearing capacity, transmission performance and life of rolling bearings include: contact stress, sliding friction and lubrication. The contact stress is generally reduced by using cylindrical rollers and improving the contact shape between the rollers and the raceway and applying multiple rows of rollers to increase the number of contact points; sliding friction occurs on the contact surface and the contact line between the rollers and the raceway The linear speed of each point is inconsistent, which can be improved through the design and manufacture of the contact shape between the roller and the raceway; the key role of lubrication is to reduce the friction coefficient and avoid dry friction; maintain the rolling contact film to avoid direct contact damage; absorb the working chamber of the bearing noise.

However, the structure of existing rolling bearings has insurmountable weaknesses: the inner and outer rings are integrated with the raceways; the rollers are in direct rigid contact with the raceways of the inner and outer rings, and the raceways cannot be adaptively oscillated and/or Circumferential misalignment, high contact stress, poor running stability of the bearing, high noise, low adaptability to complex loads, and short life.

Therefore, under the requirements of high performance, high precision, long life and high speed, heavy load and complex dynamic load environment, the existing bearing structure still needs to be improved.

Contents of the invention

The object of the present invention is to provide a fretting flexible rolling bearing, which has strong adaptability to complex load conditions, high transmission stability and precision, low contact stress and long service life.

The technical solution adopted by the present invention to realize the purpose of the invention is: a fretting flexible rolling bearing, including single-row, double-row or multi-row inner rings, outer rings and rolling elements between the inner rings and outer rings, characterized in that: In the single-row, double-row or multi-row inner rings and outer rings, a raceway ring is arranged between the inner ring and/or outer ring of each row and the rolling elements, and the raceway surface of the raceway rings and the rolling elements Contact matching, the non-raceway surface of the raceway ring is in contact with the arc groove on the inner ring and/or outer ring; the edge of the arc groove of the inner ring or outer ring is embedded with a retaining ring; the rolling body, raceway ring and The interstitial spaces between the arc grooves are filled with grease.

Compared with prior art, the beneficial effect of the present invention is:

Add a raceway ring to the existing bearing to replace the raceway on the inner ring and/or outer ring of the existing bearing to contact and friction with the rolling body; the other side (non-raceway surface) of the raceway ring is an arc surface and the bearing The arc grooves on the inner ring and/or the outer ring are paired, and the two form a wobble and/or circumferential stagger fretting fit in a lubricated environment, and the wobble fretting degree is controlled by the retaining ring. Therefore, the random bending and torsional rotational loads of the rollers acting on the raceway surface can be flexibly transmitted to the inner ring and/or through the adaptive oscillation and/or circumferential staggering of the non-raceway surface of the raceway ring. Or the outer ring, forming an adaptive micro-motion flexible force transmission mechanism, which reduces the impact, noise and contact stress between the raceway surface and the rolling elements, improves the stability of the bearing operation, the operation accuracy and the adaptability to complex random loads, and prolongs the bearing life. bearing life. Especially suitable for bearings with high performance, high precision, high speed requirements, heavy load, and strong random load service environment.

At the same time, since the bearing is mainly damaged by the contact between the raceway ring and the rolling body, the inner and outer ring bodies can be made of cheaper materials, which reduces the manufacturing cost; after the raceway ring is worn, only the raceway ring needs to be replaced, and there is no need to replace the entire inner ring or The outer ring reduces the cost of use and maintenance.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1A is a schematic cross-sectional structure diagram of a single row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 1 of the present invention.

1B is a schematic cross-sectional structure diagram of a single-row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 2 of the present invention.

Fig. 1C is a schematic cross-sectional structure diagram of a single-row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 3 of the present invention.

2A is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 4 of the present invention.

2B is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 5 of the present invention.

2C is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing with spherical rolling elements according to Embodiment 6 of the present invention.

3A is a schematic cross-sectional structure diagram of a single-row fretting flexible rolling bearing in which the rolling elements are cylinders according to Embodiment 7 of the present invention.

3B is a schematic cross-sectional structure diagram of a single-row fretting flexible rolling bearing in which the rolling elements are cylinders according to Embodiment 8 of the present invention.

3C is a schematic cross-sectional structure diagram of a single-row fretting flexible rolling bearing in which the rolling elements are cylinders according to Embodiment 9 of the present invention.

4A is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing in which the rolling elements are cylinders according to Embodiment 10 of the present invention.

Fig. 4B is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing in which the rolling elements are cylinders according to the eleventh embodiment of the present invention.

4C is a schematic cross-sectional structure diagram of a double-row fretting flexible rolling bearing in which the rolling elements are cylinders according to Embodiment 12 of the present invention.

Specific implementation method:

Embodiment one

FIG. 1A shows that a specific embodiment of the present invention is a fretting flexible rolling bearing, which includes a single row of inner ring 2 , outer ring 3 and rolling elements 5 between the inner ring 2 and outer ring 3 . A raceway ring 1 is arranged between the inner ring 2 and the rolling elements 5 , the raceway surface 1A of the raceway ring 1 is in contact with the rolling elements 5 , and the non-raceway surface 1B of the raceway ring 1 is in contact with the arc on the inner ring 2 The groove 2A is in contact with each other; the edge of the arc groove 2A of the inner ring 2 is embedded with the stop ring 4; the gap space between the rolling element 5, the raceway ring 1 and the arc groove 2A is filled with grease.

In the fretting flexible rolling bearing of this example, the raceway ring 1 is a single rolling ring, which is arranged between the inner ring 2 and the rolling body 5, and the rolling body 5 is a spherical roller.

Embodiment two

FIG. 1B shows that a fretting flexible rolling bearing in this example includes a single row of inner ring 2 , outer ring 3 and rolling elements 5 between the inner ring 2 and outer ring 3 . A raceway ring 1 is arranged between the outer ring 3 and the rolling body 5 , the raceway surface 1A of the raceway ring 1 is in contact with the rolling body 5 , and the non-raceway surface 1B of the raceway ring 1 is in contact with the arc on the outer ring 3 The grooves 3A are in contact with each other; the edge of the arc groove 3A of the outer ring 3 is embedded with the retaining ring 4; the gap space between the rolling element 5, the raceway ring 1 and the arc groove 3A is filled with grease. The rolling body 5 spherical rollers of this example.

Obviously, the difference between this example and the first example is that the raceway ring 1 is arranged between the outer ring 3 and the rolling elements 5 .

Embodiment three

FIG. 1C shows that a fretting flexible rolling bearing in this example includes a single row of inner ring 2 , outer ring 3 and rolling elements 5 between the inner ring 2 and outer ring 3 . A raceway ring 1 is arranged between the inner ring 2 and the outer ring 3 and the rolling body 5, the raceway surface 1A of the raceway ring 1 is in contact with the rolling body 5, and the non-raceway surface 1B of the two raceway rings 1 is in contact with the rolling body 5 respectively. The arc-shaped grooves 2A and 3A on the inner ring 2 and outer ring 3 are in contact with each other; the edges of the arc-shaped grooves 2A and 3A on the inner ring 2 and outer ring 3 are embedded with retaining rings 4; rolling elements 5, raceway rings 1 and The gap space between the arc grooves 2A, 3A is filled with lubricating grease. The rolling body 5 spherical rollers of this example.

Obviously, the difference between this example and the first and second examples is that there are two raceway rings 1 , which are respectively arranged between the inner ring 2 and the rolling elements 5 , and between the outer ring 3 and the rolling elements 5 .

Embodiment four

FIG. 2A shows that a fretting flexible rolling bearing of this example includes double-row inner rings 2 , outer rings 3 and rolling elements 5 between the inner rings 2 and outer rings 3 . A raceway ring 1 is arranged between the inner ring 2 of each row and the rolling body 5, and the raceway surface 1A of the raceway ring 1 is in contact with the rolling body 5, and the non-raceway surface 1B of the raceway ring 1 of each row is in contact with the rolling body 5 The arc groove 2A on the inner ring 2 of each row is in contact with each other; the edge of the arc groove 2A of the inner ring 2 of each row is embedded with the retaining ring 4; the rolling element 5, the raceway ring 1 and the arc groove 2A The interstitial spaces are filled with grease. The rolling body 5 spherical rollers of this example.

Obviously, the difference between this example and the first example is that the inner ring 2, the outer ring 3 and the rolling elements 5 are in two rows, and the corresponding raceway rings 1 are also in two rows.

Embodiment five

FIG. 2B shows that a fretting flexible rolling bearing of this example includes double-row inner rings 2 , outer rings 3 and rolling elements 5 between the inner rings 2 and outer rings 3 . A raceway ring 1 is arranged between the outer ring 3 of each row and the rolling body 5, and the raceway surface 1A of the raceway ring 1 is in contact with the rolling body 5, and the non-raceway surface 1B of each row of raceway ring 1 is in contact with the rolling body 5 The arc grooves 3A on the outer rings 3 of each row are in contact with each other; the edge of the arc grooves 3A on the outer rings 3 of each row is embedded with a retaining ring 4; between the rolling body 5, the raceway ring 1 and the arc grooves 3A The interstitial spaces are filled with grease. The rolling body 5 spherical rollers of this example.

Obviously, the difference between this example and the second embodiment is that the inner ring 2, the outer ring 3 and the rolling elements 5 are in two rows, and the corresponding raceway rings 1 are also two; the difference from the fourth embodiment is that the raceway ring 1 is set between the outer ring 3 and the rolling elements 5.

Embodiment six

FIG. 2C shows that a fretting flexible rolling bearing of this example includes double-row inner rings 2 , outer rings 3 and rolling elements 5 between the inner rings 2 and outer rings 3 . A raceway ring 1 is arranged between the inner ring 2 and the outer ring 3 of each row and the rolling elements 5 . In each row: the raceway surfaces 1A of the two raceway rings 1 are in contact with the rolling elements 5, and the non-raceway surfaces 1B of the two raceway rings 1 are in contact with the arc grooves 2A and 3A on the inner ring 2 or outer ring 3 respectively Matching; the edges of the arc grooves 2A and 3A of the inner ring 2 and the outer ring 3 are embedded with retaining rings 4; the gap space between the rolling element 5, the raceway ring 1 and the arc grooves 2A and 3A is filled with lubricating grease. The rolling body 5 spherical rollers of this example.

Obviously, the difference between this example and the third embodiment is that the inner ring 2, the outer ring 3 and the rolling elements 5 are in two rows, and the corresponding raceway rings 1 are also two pairs, a total of four; and the difference with the fourth and fifth embodiments Yes, two raceway rings 1 in each row are set between the inner ring 2 and the rolling elements 5, and between the outer ring 3 and the rolling elements 5, respectively.

Embodiment seven

FIG. 3A shows that this embodiment is basically the same as Embodiment 1, except that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment eight

Fig. 3B shows that this embodiment is basically the same as the second embodiment, the only difference is that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment nine

FIG. 3C shows that this embodiment is basically the same as the third embodiment, except that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment ten

FIG. 4A shows that this embodiment is basically the same as the fourth embodiment, the only difference is that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment Eleven

FIG. 4B shows that this example is basically the same as the fifth example, except that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment 12

FIG. 4C shows that this example is basically the same as the sixth example, except that the rolling element 5 is changed from a spherical roller to a cylindrical roller.

Embodiment Thirteen

A fretting flexible rolling bearing in this example includes three rows of inner rings, outer rings and rolling elements between the inner rings and the outer rings. Raceway rings are arranged between the inner and outer rings of each row and the rolling elements. In each column: the raceway surfaces of the two raceway rings are in contact with the rolling elements, and the non-raceway surfaces of the two raceway rings are respectively in contact with the arc grooves on the inner ring or outer ring; the arc shape of the inner ring and outer ring The edge of the groove is embedded with a retaining ring; the gap space between the rolling element, the raceway ring and the arc groove is filled with lubricating grease.

Claims (1)

1. a micro flexible rolling bearing, comprise single-row, the inner ring (2) of biserial or multiple row, rolling element (5) between outer ring (3) and inner ring (2) and outer ring (3), it is characterized in that: described is single-row, the inner ring (2) of biserial or multiple row, in outer ring (3), between the inner ring (2) of every row and/or outer ring (3) and rolling element (5), be provided with raceway rings (1), the roller surface (1A) of this raceway rings (1) contacts pairing with rolling element (5), curve bath (2A on the non-roller surface (1B) of raceway rings (1) and inner ring (2) and/or outer ring (3), 3A) contact pairing, swing and/or circumferentially changing of the relative positions fine motion by the self adaption of the non-roller surface of raceway rings (1) (1B), thereby the random bend that roller is acted on roller surface (1A) is delivered to inner ring (2) and/or outer ring (3) flexibly with reversing dynamic load, form self adaption micro flexible power transmission mechanism, the edge of the curve bath (2A, 3A) of inner ring (2) or outer ring (3) is embedded with baffle ring (4), clearance space between rolling element (5), raceway rings (1) and curve bath (2A, 3A) is filled lubricating ester.