CN111473045A - High-speed rail bearing provided with reverse spherical roller tracks - Google Patents

Abstract

The invention relates to a bearing, in particular to a high-speed rail bearing provided with a reverse spherical roller track, which consists of two double-half inner ring rings, an outer sleeve ring and two rows of spherical rollers, wherein the outer circumferences of the two double-half inner ring rings are respectively provided with a circle of reverse spherical roller track, the two double-half inner ring rings are coaxially arranged on the inner circumference of the outer sleeve ring, the outer circumferences of the two double-half inner ring rings are coaxially combined to form a shared reverse spherical roller track, the curvature radius of the shared reverse spherical roller track is larger than that of the bearing roller track, two ends of the inner circumference of the outer sleeve ring are correspondingly provided with a circle of spherical roller track at intervals, the spherical roller track forms an angle of 1-20 degrees with the vertical axis of the bearing, the spherical rollers are respectively arranged in the spherical roller tracks, and the reverse spherical roller track bearing structure is formed by combining the spherical rollers and the shared reverse spherical roller tracks arranged on the outer circumferences of the inner sleeve rings, the curvature radius of the reverse spherical roller track can be multiplied, the combined load ratio of the spherical roller bearing can be greatly adjusted, the contact angle of the roller is effectively reduced, and the purposes of high speed, heavy load, low friction, low temperature rise and long service life are achieved.

Description

High-speed rail bearing provided with reverse spherical roller tracks

Technical Field

The invention relates to a high-speed rail bearing.

Background

1. At present: the high-speed rail bearing manufactured in developed countries in the world is still a tapered roller bearing manufactured by means of advanced bearing materials and process technologies, and research data show that: the mechanical structure of a tapered roller bearing has a number of fatal defects, such as:

(1) stress concentration: stress concentration at the end part of a roller of the tapered roller bearing is an inherent fatal defect which cannot be radically treated, and the common main harm is that indentation and peeling of a raceway are caused;

(2) the roller is easily skewed: the biggest inherent fatal defect of the tapered roller bearing is that the roller is easy to incline due to uneven stress of a roller contact line in rotation, and the mechanical concept of the roller inclination is as follows: when a roller is skewed, the rolling surface of the roller is not in line contact with the roller path any longer, but is clamped between the inner and outer ring roller paths at a certain angle like a wedge, and slides and rubs during biting with the inner and outer rings to cause indentation or peeling of one end of a rolling element, and severe abrasion of the other end of the rolling element directly causes indentation, peeling, retainer cracking or flange cracking of the roller path of the ring, which often occurs in a wheel axle bearing of a heavy-duty automobile, currently, developed countries adopt a method for increasing the roller convexity to reduce stress concentration of the roller end, but still can not change the mechanical essence of stress concentration, and can not fundamentally correct the defects of the innate mechanical structure;

(3) hazards caused by tapered roller contact angles:

a: because the size of the roller inclination angle is in direct proportion to the friction resistance of the bearing and in inverse proportion to the radial bearing capacity of the bearing, the increase of the roller inclination angle directly causes the increase of the friction resistance of the bearing and the reduction of the radial bearing capacity, the starting friction resistance can be increased by 4-8 times (SKF- - -P103 page) along with the increase of the roller inclination angle, the sliding friction during starting can be directly caused, and the roller inclination angle is one of the bottlenecks for limiting the high-speed heavy load of the bearing,

b: the sliding friction of bearing gravity between the end face of the large end of the tapered roller and the flange of the ferrule is an uncorrectable congenital defect, and the SKF data shows that: because the loads acting on the flanges cannot be evenly distributed, abrasion is increased, even the flanges are likely to break (SKF bearing comprehensive type P506 page), the larger the inclination angle of the roller is, the larger the bearing force of the flanges is, the larger the friction resistance of the large end is increased, not only is the grease lubrication difficult and the high-speed performance poor, but also the bearing roller is easy to incline, the bearing is heated and the flanges are easy to break, and a plurality of potential safety hazards in the high-speed rotation of the bearing can be directly caused,

c: it is known that: the size of the contact angle of the bearing roller directly influences the frictional resistance, frictional wear and frictional heat of the bearing, so that the frictional resistance (friction coefficients 0, 0017-0 and 0025) of the tapered roller bearing is 100 percent larger than that (friction coefficients 0, 0008-0 and 0012) of the cylindrical roller bearing,

because the mechanical principle of the combined load of the tapered roller bearing is realized by the size of the roller contact angle (inclination angle), the tapered roller bearing directly distributes the load to be received in the radial direction and the axial direction of the bearing simultaneously according to the size of the contact angle, namely: directly derives a constant axial force and causes the inherent serious drawbacks, namely: the load born by the bearing can not automatically adjust the optimal ratio of combined load along with different working conditions, so that the bearing is always in a set stress state in the axial direction and the radial direction, and the axial force caused by a contact angle is the same as the principle of a lateral adjusting nozzle of a rocket jet engine, such as: how harmful a rocket jet engine would be to always jet sideways when it does not require the nozzle to be adjusted sideways for auxiliary jetting! Is there a

The same principle is true for high-speed rail operation if the high-speed rail is operated straight for a long time without a large axial load, but: the axial load derived from the tapered roller according to the contact angle (inclination angle) of the roller and the friction resistance and friction abrasion generated by the axial load are always imposed on the bearing like the shadow, which not only causes insufficient radial load of the bearing, but also causes various hazards such as unnecessary increase of the friction resistance and friction abrasion of the bearing, increase of friction heat, promotion of oblique sliding of the roller and the like,

2. research and practice find that: the centripetal spherical roller bearing also has great defects and limitations in the design of a mechanical structure, the radius of a spherical roller track is limited by the radius of a bearing, the radius of the spherical track is necessarily smaller than the radius of the bearing, the congenital curvature of the spherical roller track is directly overlarge, the practical application range of the spherical roller track of the centripetal bearing is narrow, only a circle of spherical surface with the maximum spherical diameter can be utilized, therefore, the setting of the roller length is short, any method for increasing the roller length and the roller contact angle can cause the thrust spherical roller bearing effect, the axial bearing capacity of the centripetal spherical roller bearing is directly increased meaninglessly and the radial bearing capacity is reduced, the friction resistance, the friction heating and the rated rotating speed of the bearing can be caused to be increased sharply, and the inherent defects and the limitations of the centripetal spherical roller bearing can greatly limit the regulation of the ultimate rotating speed and the combined load of the centripetal spherical roller bearing, and the advantages of the spherical roller bearing can not play a greater application value in a wider field,

the invention finds out in the deep exploration that: under the condition that the diameter of the bearing is not changed, the curvature radius of the reverse spherical roller track is not limited by the radius of the bearing, the curvature radius of the spherical roller track can be doubled and increased in a larger range, and the following findings are obtained:

(1) when the roller length is not changed: the radius of the spherical roller track is inversely proportional to the contact angle of the roller,

(2) under the condition that the contact angle of the spherical roller is unchanged, the length of the spherical roller is proportional to the radius of the track of the spherical roller, namely: A. when the track radius of the spherical roller is increased and the length size of the roller is not changed, the radial load of the bearing is inversely increased along with the reduction of the contact angle of the roller, the frictional resistance is proportionally reduced along with the reduction of the contact angle of the roller,

B. when the radius of the spherical track is increased and the contact angle of the roller is not changed, the length range of the roller is increased proportionally with the increase of the diameter of the spherical roller track, so that the radial bearing capacity is increased proportionally, the axial bearing capacity of the bearing is not changed, the friction resistance of the bearing is not changed (under the same condition, the friction resistance of the bearing has a direct relation with the contact angle of the roller),

C. when the length of the roller is not changed, the contact angle inverse proportion of the roller is reduced along with the increase of the track radius of the spherical roller, the friction resistance of the bearing is reduced along with the inverse proportion, the radial bearing capacity of the bearing is improved along with the increase of the radial bearing capacity of the bearing, the optimal axial bearing capacity of the bearing can be kept by adjusting the radius proportion of the track of the spherical roller, the bearing can adapt to higher rotating speed,

the invention content is as follows:

in view of the technical defects of the tapered roller high-speed rail bearing, the invention provides a mechanical structure of a reverse spherical roller track and a mechanical structure provided with a ball bearing embedded ball, wherein:

(1) the mechanical structure of the reverse spherical roller track is as follows: a shared spherical roller track is arranged on the outer circumference of the inner ring, the outer circumference of the reducing middle ring or the outer circumferences of the double-half inner rings, and a mechanical structure of a reverse spherical roller track is formed,

the application of the reverse spherical roller track mechanical structure changes the limitation that the curvature radius of the spherical roller track is smaller than the radius of the bearing, so that the curvature radius of the roller track can be selected in a wider range, the adjustment of the size of the bearing roller contact angle according to the design requirement, the adjustment of the optimal ratio of the bearing combined load bearing capacity, the adjustment of the optimal ratio of the friction resistance and the rotating speed of the bearing are realized,

(2) because any point of the surface of the ball is completely equal to the radius of the center of the ball, the spherical rolling body can still keep pure rolling friction of two-point contact between an inner track and an outer track under the action of complex moment, and the friction coefficient (0, 001-0 and 0012) of the ball bearing is low, the ball bearing has the best high-speed stability and rigidity, the raceway and the steel ball have excellent tightness, the lubricating condition is reliable, the ball bearing is very durable, the ball bearing does not need to be frequently maintained, and the ball bearing has good performance of bearing combined load (SKF bearing-P290 page). The bearing has larger bearing capacity, more stable operation, less friction and higher rotating speed,

the invention fully utilizes the mechanical structure of the reverse spherical roller track and the advantages of the two-point contact pure rolling friction bearing combined load of the central ball, and combines the mechanical characteristics of large bearing capacity, small friction coefficient and uniform contact stress of the cylindrical roller, the spherical roller and the circular roller to create the high-speed, heavy-load and low-friction high-speed iron bearing,

the technical scheme adopted by the invention for realizing the purpose is as follows: a high-speed rail bearing provided with inverted spherical roller tracks, comprising: two double-half inner rings, one outer ring and two rows of rolling bodies; the method is characterized in that: the outer circumferences of the two double-half inner ferrules are respectively provided with a circle of reverse spherical roller track, the two double-half inner ferrules are coaxially arranged on the inner circumference of the outer ferrule, the outer circumferences of the two double-half inner ferrules which are coaxially combined form a shared reverse spherical roller track, the curvature radius of the shared spherical roller track is larger than the radius of the bearing roller circumferential track,

the two ends of the axial distance of the inner circumference of the outer race are respectively provided with a circle of spherical roller track corresponding to the distance, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks, and the spherical rollers and the shared reverse spherical roller track arranged on the outer circumference of the inner race are combined to form a reverse spherical roller bearing structure.

A high-speed rail bearing provided with inverted spherical roller tracks, comprising: an inner ring, an outer ring and two rows of rolling bodies; the method is characterized in that: and a circle of common spherical roller track is arranged on the outer circumference of the inner ferrule, and the curvature radius of the common spherical roller track is larger than the radius of the circumferential track of the bearing roller.

The two ends of the inner circumference of the outer race are respectively provided with a circle of spherical roller track at intervals corresponding to each other, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks, and the spherical rollers and the shared reverse spherical roller track arranged on the outer circumference of the inner race are combined to form a reverse spherical roller bearing structure.

A high-speed rail bearing provided with inverted spherical roller tracks, comprising: an outer lasso, two half inner ring, a deep groove ball bearing inner ring, three rows of rolling elements, characterized by: the middle part of the axial distance of the inner circumference of the outer ring is provided with a circle of deep groove spherical rolling body track, spherical rolling bodies are arranged in the deep groove spherical rolling body track, two ends of the deep groove spherical rolling body track are correspondingly provided with a circle of spherical roller track at intervals, the spherical roller track and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller track,

the inner ring of the deep groove ball bearing is arranged between the two double-half inner rings and corresponds to a circle of deep groove ball rolling body tracks arranged on the middle circumference of the inner circle of the outer ring, and a middle ball structure of the deep groove ball bearing is formed by combining the ball rolling bodies,

the two double-half inner ring sleeves are coaxially arranged on two sides of the inner ring sleeve of the deep groove ball bearing respectively, a circle of reverse spherical roller track is arranged on the outer circumference of each double-half inner ring sleeve, after the two double-half inner ring sleeves are coaxially combined, the outer circumferences of the two double-half inner ring sleeves share the reverse spherical roller track, the curvature radius of the shared spherical roller track is larger than that of the bearing roller circumferential track, and the two double-half inner ring sleeves are combined with the spherical roller tracks arranged at two ends of the inner circumference of the outer ring sleeve through spherical rollers to form a reverse spherical roller bearing structure.

The utility model provides a set up orbital high-speed railway bearing of reverse spherical roller, includes an inner race, a deep groove ball bearing outer race, two half outer races, one row of spherical rolling element and two rows of spherical rollers, characterized by: a circle of common reverse spherical roller track is arranged on the outer circumference of the inner ferrule, the curvature radius of the common reverse spherical roller track is larger than the radius of the bearing roller circumferential track, a circle of deep groove ball rolling body track is arranged in the middle of the axial distance of the common reverse spherical roller track on the outer circumference of the inner ferrule,

the outer ring of the deep groove ball bearing is arranged in the middle of the axial distance of the outer circumference of the inner ring, and a circle of deep groove ball rolling body tracks arranged in the middle of the outer circumference of the inner ring are combined with the spherical rolling body to form a middle ball-placing structure of the deep groove ball bearing,

the two double-half outer rings are coaxially arranged on two sides of the outer ring of the deep groove ball bearing, the inner circumferences of the double-half outer rings are respectively provided with a circle of spherical roller track, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, and the two double-half outer rings are respectively combined through the spherical rollers and the shared reverse spherical roller track arranged on the outer circumference of the inner ring to form a reverse spherical roller bearing structure.

A high-speed rail bearing provided with inverted spherical roller tracks, comprising: the deep groove ball bearing comprises a variable-diameter middle ring, an inner ring, a deep groove ball bearing outer ring, two double-half outer rings, an inner layer of rolling body and an outer layer of rolling body; the method is characterized in that: the reducing middle ring is provided with a circle of deep groove spherical rolling body tracks in the middle of the axial distance of the outer circumference, spherical rolling bodies are arranged in the deep groove spherical rolling body tracks, two rows of cylindrical roller tracks are respectively arranged at the two ends of the deep groove spherical rolling body tracks at intervals corresponding to each other, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of spherical roller tracks are respectively arranged at the two ends of the inner circumference of the reducing middle ring at intervals, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks,

a circle of shared reverse spherical roller track is arranged on the outer circumference of the inner ferrule, the curvature radius of the shared reverse spherical roller track is larger than the radius of the roller circumferential track, the shared reverse spherical roller track corresponds to two rows of spherical roller tracks which are respectively arranged at two ends of the inner circumference of the reducing middle ring, a reverse spherical roller bearing structure is formed by combining two rows of spherical rollers,

the outer ring of the deep groove ball bearing is arranged in the middle of the outer circumference of the reducing middle ring, the ball rolling bodies and the track combination of the deep groove ball rolling bodies arranged in the middle of the outer circumference of the reducing middle ring form a ball bearing middle-arranged ball structure,

the two double-half outer rings are coaxially arranged on two sides of the outer ring of the deep groove ball bearing on the outer circumference of the reducing middle ring respectively, cylindrical roller tracks are arranged on the inner circumference of each of the two double-half outer rings, cylindrical roller outer retaining shoulders are arranged at the outer ends of the cylindrical roller tracks respectively, and the two double-half outer rings are combined with the cylindrical roller tracks arranged at two ends of the outer circumference of the reducing middle ring respectively through the cylindrical rollers to form a cylindrical roller bearing structure.

A high-speed rail bearing provided with inverted spherical roller tracks, comprising: the deep groove ball bearing comprises a variable-diameter middle ring, two double-half inner rings, a deep groove ball bearing outer ring, two double-half outer rings, an inner layer of rolling body and an outer layer of rolling body; the method is characterized in that: the reducing middle ring is provided with a circle of deep groove spherical rolling body tracks in the middle of the axial distance of the outer circumference, spherical rolling bodies are arranged in the deep groove spherical rolling body tracks, two rows of cylindrical roller tracks are respectively arranged at the two ends of the deep groove spherical rolling body tracks at intervals corresponding to each other, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of spherical roller tracks are respectively arranged at the two ends of the inner circumference of the reducing middle ring at intervals, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks,

the outer circumferences of the two double-half inner ferrules are respectively provided with a reverse spherical roller track, the outer circumferences of the two double-half inner ferrules which are coaxially combined form a shared reverse spherical roller track, the curvature radius of the shared reverse spherical roller track is larger than that of the bearing roller circumferential track, and the two double-half inner ferrules are combined with the spherical roller tracks arranged at the two ends of the inner circumference of the reducing middle ring through spherical rollers to form a reverse roller bearing structure.

The outer ring of the deep groove ball bearing is arranged in the middle of the outer circumference of the reducing middle ring, the ball rolling bodies and the track combination of the deep groove ball rolling bodies arranged in the middle of the outer circumference of the reducing middle ring form a ball bearing middle-arranged ball structure,

the two double-half outer rings are coaxially arranged on two sides of the outer ring of the deep groove ball bearing on the outer circumference of the reducing middle ring respectively, cylindrical roller tracks are arranged on the inner circumference of each of the two double-half outer rings, cylindrical roller outer retaining shoulders are arranged at the outer ends of the cylindrical roller tracks respectively, and the two double-half outer rings are combined with the cylindrical roller tracks arranged at two ends of the outer circumference of the reducing middle ring through the cylindrical rollers to form a cylindrical roller bearing structure.

A high-speed rail bearing provided with inverted spherical roller tracks, comprising: the inner ring and the outer ring are respectively provided with a diameter-variable middle ring, an inner ring, an outer ring, an annular cylindrical roller outer retaining shoulder, an inner layer of rolling body and an outer layer of rolling body; the method is characterized in that: the reducing middle ring is provided with a circle of deep groove spherical rolling body tracks in the middle of the axial distance of the outer circumference, spherical rolling bodies are arranged in the deep groove spherical rolling body tracks, two rows of cylindrical roller tracks are respectively arranged at the two ends of the deep groove spherical rolling body tracks at intervals corresponding to each other, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of spherical roller tracks are respectively arranged at the two ends of the inner circumference of the reducing middle ring at intervals, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks,

a circle of shared reverse spherical roller track is arranged on the outer circumference of the inner ferrule, the curvature radius of the shared reverse spherical roller track is larger than the radius of the roller circumferential track, the shared reverse spherical roller track corresponds to two rows of spherical roller tracks which are respectively arranged at two ends of the inner circumference of the reducing middle ring, a reverse spherical roller bearing structure is formed by combining two rows of spherical rollers,

the deep groove ball rolling element track is arranged in the middle of the inner circumference of the outer sleeve ring, a circle of cylindrical roller track is arranged at each of two ends of the deep groove ball rolling element track, the deep groove ball rolling element track in the middle of the inner circumference of the outer sleeve ring is combined with the deep groove ball rolling element track arranged in the middle of the outer circumference of the reducing middle ring through the spherical rolling elements to form a middle ball structure of the ball bearing, and the cylindrical roller bearing structure is formed by combining two rows of cylindrical rollers with the cylindrical roller tracks arranged at two ends of the outer circumference of the reducing middle ring.

The outer retaining shoulders of the annular cylindrical roller are arranged at two ends of the outer ferrule and form a sliding friction retaining shoulder structure with the outer end surface of the cylindrical roller.

The high-speed rail bearing with the reverse spherical roller track has the beneficial effects that: the mechanical structure of a reverse spherical roller track and the mechanical structure of a ball arranged in a spherical rolling body are adopted, wherein: (1) the application of the reverse spherical roller track mechanical structure changes the limitation that the curvature radius of the spherical roller track of the bearing is smaller than the radius of the bearing, so that the curvature radius of the spherical roller track can be selected in a wider range, the adjustment of the contact angle of the spherical roller of the bearing according to the design requirement is realized, the ratio of the joint load bearing capacity of the bearing is adjusted, and the frictional resistance and the rotating speed of the bearing are adjusted; (2) because any point of the surface of the ball is completely equal to the radius of the center of the ball, the spherical rolling body can still keep pure rolling friction of two-point contact between an inner track and an outer track under the action of complex moment, and the friction coefficient (0, 001 < -0 > and 0012) of the ball bearing is low, thereby having the best high-speed stability and rigidity, having excellent tightness between a raceway and a steel ball, reliable lubrication condition, very durable performance, no need of frequent maintenance and good performance of bearing combined load (SKF bearing page P290),

the invention fully utilizes the mechanical structure of the reverse spherical roller track and the advantages of the middle ball two-point contact pure rolling bearing combined load as a whole, and combines the mechanical characteristics of large bearing capacity, small friction coefficient and uniform contact stress of the cylindrical roller, the spherical roller and the circular roller, thereby creating the high-speed rail bearing with the reverse spherical roller track, which perfectly applies the mechanical advantages of the deep groove ball bearing two-point contact pure rolling friction and all the mechanical advantages of the spherical roller bearing, and more importantly: it has broken through defect and the limitation that traditional spherical roller bearing exists, has fully developed spherical roller bearing's application potentiality, makes spherical roller bearing can bear the joint load of best ratio, makes the bearing possess high speed, heavy load, low friction, low temperature rise, longe-lived characteristic, can adapt to higher high-speed railway and axle load, consequently: the technology of the invention has obvious scientific and technological progress significance for the high-speed rail bearing,

drawings

Figure 1 is a cross-sectional view of a high-speed rail bearing with inverted spherical roller tracks provided with double inner races according to the present invention,

figure 2 is a cross-sectional view of a high-speed rail bearing with inverted spherical roller tracks with inner and outer races according to the present invention,

figure 3 is a cross-sectional view of the high-speed rail bearing with reverse spherical roller tracks of the present invention provided with a deep groove ball bearing inner race,

figure 4 is a cross-sectional view of a high-speed rail bearing with inverted spherical roller tracks of the present invention provided with a deep groove ball bearing outer race,

figure 5 is a cross-sectional view of a high-speed rail bearing with inverted spherical roller tracks provided with a variable diameter middle ring and a deep groove ball bearing outer ring according to the invention,

FIG. 6 is a cross-sectional view of a high-speed rail bearing with reverse spherical roller tracks, provided with a variable-diameter middle ring, a double-half inner ring and a deep groove ball bearing outer ring according to the invention,

FIG. 7 is a cross-sectional view of the high-speed rail bearing with reverse spherical roller tracks, which is provided with a reducing middle ring, an outer blocking shoulder of a circular cylindrical roller, an inner ring and an outer ring,

FIG. 8 is a schematic representation of the invention: the structure and principle schematic diagram of the reverse spherical roller track, wherein fig. 8(1) is an axial cross-sectional structure of the reverse spherical roller track, fig. 8(2) is a spherical roller, fig. 8(R) is a curvature radius of the reverse spherical roller track, fig. 8(a) is a roller contact angle, and fig. 8 illustrates: when the length of the spherical roller (2) is not changed, the larger the curvature radius (R) of the reverse spherical roller track (1), the smaller the contact angle (A) of the spherical roller (2).

Fig. 9 is a schematic structural and schematic diagram of a conventional spherical roller track, in which fig. 9(1) is an axial cross-sectional structure of the spherical roller track, fig. 9(2) is a spherical roller, fig. 9(R) is a curvature radius of the spherical roller track, fig. 9(a) is a roller contact angle, and fig. 9 illustrates: when the length of the spherical roller (2) is not changed, the smaller the curvature radius (R) of the spherical roller track (1), the larger the contact angle (A) of the spherical roller (2).

FIG. 10 is a schematic representation of the invention: fig. 10(1) is an axial cross-sectional structure of an inverted spherical roller track, fig. 10(2) is a spherical roller, fig. 10(R) is a curvature radius of the inverted spherical roller track, fig. 10(a) is a roller contact angle, fig. 10(B) is a length range of an effective bearing capacity of the roller, and fig. 10 shows: when the contact angle (A) of the spherical roller (2) is not changed, the larger the curvature radius (R) of the reverse spherical roller track (1), the larger the effective bearing capacity length range (B) of the spherical roller (2).

In the figure: 1. the deep groove ball bearing comprises an outer ring, 2, a double-half inner ring, 3, a reverse spherical roller track, 4, a spherical roller track, 5 spherical rollers, 6, an inner ring, 7, a deep groove ball bearing inner ring, 8, a deep groove ball rolling element track, 9, a deep groove ball bearing outer ring, 10, a reducing middle ring, 11, a double-half outer ring, 12, a circular cylindrical roller outer retaining shoulder, 13, a spherical rolling element, 14, a cylindrical roller, 15, a cylindrical roller track, 16 and a cylindrical roller outer retaining shoulder.

Detailed Description

The present invention will be described in further detail with reference to the collective examples below, but the present invention is not limited to the specific examples.

Example 1:

a high-speed rail bearing with inverted spherical roller tracks, as shown in fig. 1, comprising: two double-half inner ring 2, an outer ring 1 and two rows of spherical rollers 5, wherein the outer circumferences of the two double-half inner ring 2 are respectively provided with a circle of reverse spherical roller track, the two double-half inner ring 2 are coaxially arranged on the inner circumference of the outer ring 1, the outer circumferences of the two double-half inner ring 2 after being coaxially combined form a common reverse spherical roller track 3, the curvature radius of the common reverse spherical roller track 3 is larger than the radius of the bearing roller circumferential track,

the two ends of the inner circumference of the outer race 1 are respectively provided with a circle of spherical roller track 4 at intervals corresponding to each other, the spherical roller tracks 4 form an angle of 5 degrees with the vertical axis of the bearing, spherical rollers 5 are respectively arranged in the spherical roller tracks 4, and the spherical rollers 5 and the shared reverse spherical roller track 3 arranged on the outer circumference of the inner race 6 are combined to form a reverse spherical roller bearing structure.

Example 2:

a high-speed rail bearing with inverted spherical roller tracks, as shown in fig. 2, comprising: the bearing comprises two inner ring rings 6, an outer ring 1 and two rows of spherical rollers 5, wherein the outer circumference of the inner ring rings 6 is provided with a circle of shared reverse spherical roller tracks 3, and the curvature radius of the shared reverse spherical roller tracks 3 is larger than that of the circumferential tracks of the bearing rollers.

Two ends of the inner circumference of the outer race 1 are respectively provided with a circle of spherical roller track 4 at intervals corresponding to each other, the spherical roller tracks 4 form an angle of 5 degrees with the vertical axis of the bearing, spherical rollers 5 are respectively arranged in the spherical roller tracks 4, and the spherical rollers 5 and the shared reverse spherical roller track 3 arranged on the outer circumference of the inner race 6 are combined to form a reverse spherical roller bearing structure.

Example 3:

a high-speed rail bearing with inverted spherical roller tracks, as shown in fig. 3, comprising: an outer ring 1, two double-half inner rings 2, a deep groove ball bearing inner ring 7, a row of spherical rolling bodies 13, two rows of spherical rollers 5, wherein the middle part of the axial distance of the inner circumference of the outer ring 1 is provided with a circle of deep groove spherical rolling body track 8, the spherical rolling bodies 13 are arranged in the deep groove spherical rolling body track 8, two circles of spherical roller tracks 4 are respectively arranged at the two ends of the deep groove spherical rolling body track 8 at corresponding intervals, the spherical roller tracks 4 form an angle of 5 degrees with the vertical axis of the bearing, the spherical rollers 5 are respectively arranged in the spherical roller tracks 4,

the deep groove ball bearing inner ring 7 is arranged between the two double-half inner rings 2 and corresponds to a circle of deep groove ball rolling body track 8 arranged on the middle circumference of the inner circle of the outer ring 1, and a ball rolling body 13 is combined to form a middle ball structure of the deep groove ball bearing,

the two double-half inner ring rings 2 are coaxially arranged on two sides of an inner ring 7 of the deep groove ball bearing respectively, a circle of reverse spherical roller track 3 is arranged on the outer circumference of each double-half inner ring 2, the outer circumferences of the two double-half inner ring rings 2 which are coaxially combined share the reverse spherical roller track 3, the curvature radius of the shared spherical roller track 3 is larger than the radius of the bearing roller circumferential track, and the two double-half inner ring rings 2 are combined with spherical roller tracks 4 arranged at two ends of the inner circumference of the outer ring 1 through spherical rollers 5 respectively to form a reverse spherical roller bearing structure.

Example 4:

as shown in fig. 4, the high-speed rail bearing with reverse spherical roller tracks comprises an inner race 6, a deep groove ball bearing outer race 9, two double-half outer races 11, a row of spherical rolling bodies 13 and two rows of spherical rollers 5, wherein the outer circumference of the inner race 6 is provided with a circle of common reverse spherical roller tracks 3, the curvature radius of the common reverse spherical roller tracks 3 is larger than the radius of the bearing roller tracks, and the middle part of the outer circumference of the inner race 6 sharing the axial distance of the reverse spherical roller tracks 3 is provided with a circle of deep groove ball rolling body tracks 8,

the outer ring 9 of the deep groove ball bearing is arranged in the middle of the axial distance of the outer circumference of the inner ring 6, and a circle of deep groove ball rolling body track 8 arranged in the middle of the outer circumference of the inner ring 6 is combined with a spherical rolling body 13 to form a mid-ball structure of the deep groove ball bearing,

the two double-half outer rings 11 are coaxially arranged on two sides of an outer ring 9 of the deep groove ball bearing, the inner circumferences of the double-half outer rings 11 are respectively provided with a circle of spherical roller track 4, the spherical roller tracks 4 form an angle of 5 degrees with the vertical axis of the bearing, and the two double-half outer rings 11 are respectively combined with a shared reverse spherical roller track 3 arranged on the outer circumference of an inner ring 6 through spherical rollers 5 to form a reverse spherical roller bearing structure.

Example 5:

a high-speed rail bearing provided with reverse spherical roller tracks, as shown in fig. 5, comprises: a reducing middle ring 10, an inner ferrule 6, a deep groove ball bearing outer ferrule 9, two double-half outer ferrules 11, inner and outer two layers of rolling bodies, the reducing middle ring 10 is provided with a deep groove ball rolling body track 8 at the middle of the axial distance of the outer circumference, ball rolling bodies 13 are arranged in the deep groove ball rolling body track 8, a row of cylindrical roller tracks 15 are respectively arranged at the two ends of the deep groove ball rolling body track 8 at intervals, cylindrical rollers 14 are respectively arranged in the cylindrical roller tracks 15, a circle of spherical roller tracks 4 are respectively arranged at the two ends of the inner circumference of the reducing middle ring 10 at intervals, the spherical roller tracks 4 form an angle of 5 degrees with the vertical axis of the bearing, spherical rollers 14 are respectively arranged in the spherical roller tracks 4,

a circle of shared reverse spherical roller track 3 is arranged on the outer circumference of the inner ferrule 6, the curvature radius of the shared reverse spherical roller track 3 is larger than the radius of the roller circumferential track, the shared reverse spherical roller track 3 corresponds to two rows of spherical roller tracks 4 respectively arranged at two ends of the inner circumference of the reducing middle ring 10, a reverse spherical roller bearing structure is formed by combining two rows of spherical rollers 5,

the outer ring 9 of the deep groove ball bearing is arranged in the middle of the outer circumference of the reducing middle ring 10, the ball rolling body 13 is combined with the deep groove ball rolling body track 8 arranged in the middle of the outer circumference of the reducing middle ring 10 to form a ball bearing center-mounted ball structure,

the two double-half outer rings 11 are coaxially arranged on two sides of the outer ring 9 of the deep groove ball bearing on the outer circumference of the reducing middle ring 10 respectively, the inner circumferences of the two double-half outer rings 11 are respectively provided with a cylindrical roller track 15, the outer ends of the cylindrical roller tracks 15 are respectively provided with a cylindrical roller outer retaining shoulder 16, and the two double-half outer rings 11 are combined with the cylindrical roller track 15 on the outer circumference of the reducing middle ring 10 through cylindrical rollers 14 to form a cylindrical roller bearing structure.

: example 6:

a high-speed rail bearing provided with reverse spherical roller tracks as shown in fig. 6, comprising: the deep groove ball bearing comprises a variable-diameter middle ring 10, a double-half inner ring 2, a deep groove ball bearing outer ring 9, two double-half outer rings 11, an inner layer of rolling body and an outer layer of rolling body; the reducing middle ring 10 is provided with a circle of deep groove spherical rolling body tracks 8 in the middle of the axial distance of the outer circumference, spherical rolling bodies 13 are arranged in the deep groove spherical rolling body tracks 8, two rows of cylindrical roller tracks 15 are correspondingly arranged at the intervals of the two ends of the deep groove spherical rolling body tracks 8, cylindrical rollers 14 are respectively arranged in the cylindrical roller tracks 15, a circle of spherical roller tracks 4 are respectively arranged at the intervals of the two ends of the inner circumference of the reducing middle ring 10, the spherical roller tracks 4 form an angle of 10 degrees with the vertical axis of a bearing, spherical rollers 5 are respectively arranged in the spherical roller tracks 4,

the outer circumferences of the two double-half inner ferrules 2 are respectively provided with a reverse spherical roller track 3, the outer circumferences of the two double-half inner ferrules 2 which are coaxially combined form a common reverse spherical roller track 3 with the same radius, the curvature radius of the common reverse spherical roller track 3 is larger than the radius of the bearing roller circumferential track, and the two double-half inner ferrules 2 are combined with a spherical roller track 4 on the inner circumference of the reducing middle ring 10 through spherical rollers 5 to form a reverse spherical roller bearing structure.

The outer ring 9 of the deep groove ball bearing is arranged in the middle of the outer circumference of the reducing middle ring 10, the ball rolling body 13 is combined with the deep groove ball rolling body track 8 arranged in the middle of the outer circumference of the reducing middle ring 10 to form a ball bearing center-mounted ball structure,

the two double-half outer rings 11 are coaxially arranged on two sides of the outer ring 9 of the deep groove ball bearing on the outer circumference of the reducing middle ring 10 respectively, the inner circumferences of the two double-half outer rings 11 are respectively provided with a cylindrical roller track 15, the outer ends of the cylindrical roller tracks 15 are respectively provided with a cylindrical roller outer retaining shoulder 16, and the two double-half outer rings 11 are combined with the cylindrical roller track 15 on the outer circumference of the reducing middle ring 10 through cylindrical rollers 14 to form a cylindrical roller bearing structure.

Example 7:

a high-speed rail bearing provided with reverse spherical roller tracks as shown in fig. 7, comprising: a reducing middle ring 10, an inner ferrule 6, an outer ferrule 1, a ring-shaped cylindrical roller outer retaining shoulder 12 and inner and outer two layers of rolling bodies, the reducing middle ring 10 is provided with a deep groove spherical rolling body track 8 in the middle of the axial distance of the outer circumference, spherical rolling bodies 13 are arranged in the deep groove spherical rolling body track 8, a row of cylindrical roller tracks 15 are respectively arranged at the two ends of the deep groove spherical rolling body track 8 at intervals, cylindrical rollers 14 are respectively arranged in the cylindrical roller tracks 15, a circle of spherical roller tracks 4 are respectively arranged at the two ends of the inner circumference of the reducing middle ring 10 at intervals, the spherical roller tracks 4 form an angle of 7 degrees with the vertical axis of the bearing, spherical rollers 5 are respectively arranged in the spherical roller tracks 4,

a circle of shared reverse spherical roller track 3 is arranged on the outer circumference of the inner ferrule 6, the curvature radius of the shared reverse spherical roller track 3 is larger than the radius of the roller circumferential track, the reverse spherical roller track 3 corresponds to two rows of spherical roller tracks 4 respectively arranged at the two ends of the inner circumference of the reducing middle ring 10, a reverse spherical roller bearing structure is formed by combining two rows of spherical rollers 5,

the middle part of the inner circumference of the outer ring 1 is provided with a circle of deep groove ball rolling element tracks 8, two ends of each deep groove ball rolling element track 8 are respectively provided with a circle of cylindrical roller track 15, the deep groove ball rolling element tracks 8 arranged in the middle part of the inner circumference of the outer ring 1 correspond to the deep groove ball rolling element tracks 8 arranged in the middle part of the outer circumference of the reducing middle ring 10, the ball bearings are combined through spherical rolling elements 13 to form a middle ball structure of the ball bearing, and the cylindrical roller tracks 15 respectively arranged at two ends of the inner circumference of the outer ring 1 are combined with the cylindrical roller tracks 15 arranged in the outer circumference of the reducing middle ring 10 through two rows of cylindrical rollers 14 to.

The outer blocking shoulders 12 of the circular cylindrical roller are arranged at two ends of the outer ferrule 1 and form a sliding friction blocking shoulder structure with the outer end surface of the cylindrical roller 14.

Claims (7)

1. A high-speed rail bearing provided with inverted spherical roller tracks, comprising: two double-half inner rings, one outer ring and two rows of spherical rollers; the method is characterized in that: the outer circumferences of the two double-half inner ferrules are respectively provided with a circle of reverse spherical roller track, the two double-half inner ferrules are coaxially arranged on the inner circumference of the outer ferrule, the outer circumferences of the two double-half inner ferrules after being coaxially combined form a shared reverse spherical roller track, the curvature radius of the shared reverse spherical roller track is larger than the radius of the bearing roller circumferential track,

the two ends of the inner circumference of the outer race are respectively provided with a circle of spherical roller track at intervals corresponding to each other, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks, and the spherical rollers and the shared reverse spherical roller track arranged on the outer circumference of the inner race are combined to form a reverse spherical roller track bearing structure.

2. The high-speed rail bearing with inverted spherical roller tracks as set forth in claim 1, wherein: the outer circumference of the inner ring is provided with a circle of common reverse spherical roller tracks, the curvature radius of the common reverse spherical roller tracks is larger than that of the bearing roller circumferential tracks, and the inner ring is respectively combined with the spherical roller tracks arranged at the two ends of the inner circumference of the outer ring through two rows of spherical rollers to form a reverse spherical roller bearing structure.

3. A high-speed rail bearing provided with inverted spherical roller tracks, comprising: an outer lasso, two half inner ring, a deep groove ball bearing inner ring, three rows of rolling elements, characterized by: the outer race is provided with a circle of deep groove spherical rolling body track in the middle of the axial distance of the inner circumference, spherical rolling bodies are arranged in the deep groove spherical rolling body track, two ends of the deep groove spherical rolling body track are respectively provided with a circle of spherical roller track at intervals corresponding to the distance, the spherical roller track and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks,

the inner ring of the deep groove ball bearing is arranged between the two double-half inner rings and corresponds to a circle of deep groove ball rolling body tracks arranged on the middle circumference of the inner circle of the outer ring, and a middle ball structure of the deep groove ball bearing is formed by combining the ball rolling bodies,

the two double-half inner ring shafts are arranged on two sides of the inner ring of the deep groove ball bearing respectively, a circle of reverse spherical roller track is arranged on the outer circumference of each double-half inner ring, after the two double-half inner ring shafts are combined, the outer circumferences of the two double-half inner ring shafts share the reverse spherical roller track, the curvature radius of the shared spherical roller track is larger than that of the bearing roller track, and the shared reverse spherical roller track is combined with the spherical roller tracks arranged at two ends of the inner circumference of the outer ring shaft respectively through two rows of spherical rollers to form a reverse spherical roller track bearing structure.

4. The utility model provides a set up orbital high-speed railway bearing of reverse spherical roller, includes an inner race, a deep groove ball bearing outer race, two half outer races, one row of spherical rolling element and two rows of spherical rollers, characterized by: a circle of common reverse spherical roller track is arranged on the outer circumference of the inner ferrule, the curvature radius of the common reverse spherical roller track is larger than the radius of the bearing roller circumferential track, a circle of deep groove ball rolling body track is arranged in the middle of the axial distance of the common reverse spherical roller track on the outer circumference of the inner ferrule,

the outer ring of the deep groove ball bearing is arranged in the middle of the axial distance of the outer circumference of the inner ring, and a circle of deep groove ball rolling body tracks arranged in the middle of the outer circumference of the inner ring are combined with the spherical rolling body to form a middle ball-placing structure of the deep groove ball bearing,

the two double-half outer rings are coaxially arranged on two sides of the outer ring of the deep groove ball bearing, the inner circumferences of the double-half outer rings are respectively provided with a circle of spherical roller track, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, and the two double-half outer rings are respectively combined with a shared reverse spherical roller track arranged on the outer circumference of the inner ring through spherical rollers to form a reverse spherical roller track bearing structure.

5. A high-speed rail bearing provided with inverted spherical roller tracks, comprising: the deep groove ball bearing comprises a variable-diameter middle ring, an inner ring, a deep groove ball bearing outer ring, two double-half outer rings, an inner layer of rolling body and an outer layer of rolling body; the method is characterized in that: the reducing middle ring is provided with a circle of deep groove spherical rolling body tracks in the middle of the axial distance of the outer circumference, spherical rolling bodies are arranged in the deep groove spherical rolling body tracks, two rows of cylindrical roller tracks are respectively arranged at the two ends of the deep groove spherical rolling body tracks at intervals corresponding to each other, cylindrical rollers are respectively arranged in the cylindrical roller tracks, a circle of spherical roller tracks are respectively arranged at the two ends of the inner circumference of the reducing middle ring at intervals, the spherical roller tracks and the vertical axis of the bearing form an angle of 1-20 degrees, spherical rollers are respectively arranged in the spherical roller tracks,

the inner ring is provided with a circle of shared reverse spherical roller track on the outer circumference, the curvature radius of the shared reverse spherical roller track is larger than the radius of the roller circumferential track, the shared reverse spherical roller track corresponds to two rows of spherical roller tracks respectively arranged at two ends of the inner circumference of the reducing middle ring, and a reverse spherical roller bearing structure is formed by combining two rows of spherical rollers,

the outer ring of the deep groove ball bearing is arranged in the middle of the outer circumference of the reducing middle ring, the ball rolling bodies and the track combination of the deep groove ball rolling bodies arranged in the middle of the outer circumference of the reducing middle ring form a ball bearing middle-arranged ball structure,

the two double-half outer rings are coaxially arranged on two sides of the outer ring of the deep groove ball bearing on the outer circumference of the reducing middle ring respectively, cylindrical roller tracks are arranged on the inner circumference of each of the two double-half outer rings, cylindrical roller outer retaining shoulders are arranged at the outer ends of the cylindrical roller tracks respectively, and the two double-half outer rings are combined with the cylindrical roller tracks arranged at two ends of the outer circumference of the reducing middle ring through the cylindrical rollers to form a cylindrical roller bearing structure.

6. The high-speed rail bearing with inverted spherical roller tracks as set forth in claim 5, wherein: the inner ring is composed of two double-half inner rings, reverse spherical roller tracks are respectively arranged on the outer circumferences of the two double-half inner rings, the outer circumferences of the two double-half inner rings which are coaxially combined form a shared reverse spherical roller track, the curvature radius of the shared reverse spherical roller track is larger than the radius of the bearing roller circumferential track, and the two double-half inner rings are respectively combined with spherical rollers arranged at two ends of the inner circumference of the reducing middle ring through two rows of spherical rollers to form a reverse spherical roller track bearing structure.

7. A high speed railway bearing with inverted spherical roller tracks as claimed in claim 5, wherein: the outer race is a race structure with an additional annular cylindrical roller outer shoulder, a circle of deep groove ball rolling element tracks are arranged in the middle of the axial distance of the inner circumference of the outer race, a circle of cylindrical roller tracks are arranged at the two ends of the deep groove ball rolling element tracks at intervals, the deep groove ball rolling element tracks arranged in the middle of the inner circumference shaft of the outer race are combined with the deep groove ball rolling element tracks arranged in the middle of the outer circumference of the reducing middle race through spherical rolling elements to form a ball bearing centrally-mounted ball structure, the cylindrical roller tracks arranged in the two ends of the inner circumference of the outer race are respectively combined with the cylindrical roller tracks arranged in the two ends of the outer circumference of the reducing middle race through two rows of cylindrical,

the outer retaining shoulders of the annular cylindrical roller are arranged at two ends of the outer ferrule and form a sliding friction retaining shoulder structure with the outer end surface of the cylindrical roller.

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