CN115929784A

CN115929784A - Substitute bearing structure of spherical roller bearing

Info

Publication number: CN115929784A
Application number: CN202211604167.XA
Authority: CN
Inventors: 王雄厚; 李勇; 聂勋铁; 任秉林
Original assignee: Chongqing Ruisi Operation And Maintenance Technology Co ltd
Current assignee: Chongqing Ruisi Operation And Maintenance Technology Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-04-07

Abstract

The invention relates to the field of bearings and discloses a substitute bearing structure of a spherical roller bearing, which comprises a bearing seat, wherein an outer bearing sleeve is arranged on the inner side of the bearing seat in an interference fit manner, two tapered roller bearings are arranged in parallel on the inner side of the outer bearing sleeve, the outer rings of the tapered roller bearings are in interference fit with the outer bearing sleeve, and the inner rings of the tapered roller bearings are in interference fit with a shaft. The invention can solve the problem that the one-side raceway is rapidly worn due to the unbalance loading of the bearing roller raceway caused by the improper ratio of the axial stress to the radial stress when the spherical roller bearing is applied, can avoid the bearing slipping problem in the application of the wind power gear box, and can customize the outer bearing sleeve to solve the problem of wear repair of the bearing hole.

Description

Substitute bearing structure of spherical roller bearing

Technical Field

The invention relates to the field of bearings, in particular to a substitute bearing structure of a spherical roller bearing.

Background

The spherical roller bearing is used as a positioning end with a centering function, the inner ring and the outer ring are usually limited, and the axial load of the bearing is large. As shown in fig. 1, when the bearing is applied, the outer ring of the spherical roller bearing is roughly configured in a clearance fit manner, the inner ring of the bearing is in an interference fit manner, and the bearing roller raceway is easily subjected to unbalance loading due to the small ratio of the axial stress to the radial stress in use, so that the one-side raceway is rapidly worn and fails early. It is also common for the bearing seat bearing area where the bearing outer race fits to wear, so that the actual life of the bearing is much less than the design life. The cooperation of self-aligning bearing and box often causes the wearing and tearing of box dead eye because of the motion of bearing inner race, and dead eye wearing and tearing also are the common trouble performance of gear box, can cause great harmful effects to the gear engagement behind the dead eye wearing and tearing, further aggravates the process that the bearing damaged.

Disclosure of Invention

The invention aims to provide a substitute bearing structure of a spherical roller bearing, which aims to solve the problem that when the spherical roller bearing is applied, the bearing roller path is unbalanced due to improper ratio of axial stress to radial stress, so that the single-side roller path is rapidly abraded. And the occurrence of abrasion of the bearing hole wall of the box body caused by the relative motion of the bearing outer ring and the box body is avoided.

In order to achieve the purpose, the invention adopts the following technical scheme: a substitute bearing structure of a spherical roller bearing comprises a bearing seat, wherein an outer bearing sleeve is arranged on the inner side of the bearing seat in an interference fit manner, two tapered roller bearings are arranged in the outer bearing sleeve side by side, the outer rings of the tapered roller bearings are in interference fit with the outer bearing sleeve, and the inner rings of the tapered roller bearings are in interference fit with a shaft.

Preferably, as an improvement, an outer bearing sleeve between the outer rings of the two tapered roller bearings protrudes to form an outer space ring, an inner space ring is arranged between the inner rings of the two tapered roller bearings, and a step is arranged on the inner space ring.

Preferably, as an improvement, the two tapered roller bearings are asymmetrically arranged.

Preferably, as an improvement, the outer bearing sleeve is provided with a ring groove, the bearing seat is provided with an oil supply pore passage communicated with the ring groove, and the width of the ring groove is greater than that of the oil groove of the alternative spherical roller bearing. This ensures that the lubrication effect of the alternative structure is not diminished on the basis of the original spherical roller.

Preferably, as an improvement, a hollow thread stop oil nozzle is connected to the oil supply channel through a thread, a three-way oil path is arranged inside the hollow thread stop oil nozzle, one end of the three-way oil path is communicated with the oil supply channel, and the other two ends of the three-way oil path are communicated with the annular groove.

Preferably, as an improvement, the outer bearing sleeve is provided with a radial hole, and the hollow thread stop nipple comprises a cylindrical end which is inserted into the radial hole and is in clearance fit with the radial hole.

Preferably, as an improvement, four lubricating oil holes are uniformly distributed on the outer bearing sleeve along the circumference, one end of each lubricating oil hole is communicated with the annular groove, and the other end of each lubricating oil hole is communicated with the inner side of the outer spacer ring.

The principle and the advantages of the scheme are as follows: in practical application, the two asymmetrically arranged tapered roller bearings are matched, so that the roller raceways are contacted more sufficiently and bear axial force more appropriately, the condition that the contact is deviated from a unilateral bearing when the proportion of axial load and radial load is smaller is effectively avoided, and early failure caused by abrasion of the unilateral raceway is avoided. The asymmetric arrangement can strengthen the roller on one side subjected to axial load, thereby increasing the comprehensive bearing capacity of the bearing assembly to the maximum extent possible. In addition, the external diameter fit size deviation of outer bearing housing is positive, compare under the same conditions external diameter fit tolerance size of spherical roller bearing bigger, self-aligning bearing usually, the cooperation when the outer lane is static is clearance fit, and this scheme can guarantee to obtain radial interference after the assembly, when the outer bearing housing takes place the circumferencial direction trend of skidding and slides because of impact load or other reasons, its and the emergence of skidding can be hindered to the magnitude of interference of bearing frame, and the grafting cooperation of the cylinder end of hollow thread locking glib talker and radial hole, also can prevent the circumferencial direction of bearing overcoat from skidding, have the effect of fuel feeding and locking concurrently. The scheme can also thoroughly avoid the problem of bearing slippage in the application of the wind power gear box by means of interference fit and the action of a hollow thread locking oil nozzle. In the maintenance process, the outer bearing sleeve can be customized, and the problem of abrasion repair of a bearing hole is solved; the hollow thread locking oil nozzle has the advantages that the rotation of the outer bearing sleeve is avoided, the abrasion to a bearing hole cannot occur, and the abrasion to the bearing hole caused by ring running cannot occur.

Drawings

Fig. 1 is a schematic diagram of an application of the prior art.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

Fig. 3 is an enlarged view at a in fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the bearing seat comprises a bearing seat 1, an outer bearing sleeve 2, an outer spacer ring 3, a shaft end baffle 4, a tapered roller bearing 5, an inner spacer ring 6, a lubricating oil hole 7, a ring groove 8, a limiting baffle 9, a rotating shaft 10, an oil supply duct 11, a hollow thread stop oil nozzle 12, a cylindrical end 13, a radial hole 14 and a three-way oil way 15.

The embodiment is basically as shown in the attached figures 2 and 3: the utility model provides a substitute bearing structure of spherical roller bearing, includes bearing

frame

1, and 1 inboard of bearing frame is equipped with location step and spacing annular 8, and interference fit has outer bearing housing 2 on the bearing frame 1 between location step and the spacing annular 8, and spacing baffle 9 has been embedded to put in the spacing annular 8, and spacing baffle 9 carries on spacingly to the terminal surface that outer bearing housing 2 deviates from the location step. The outer bearing sleeve 2 is provided with an annular groove 8, the bearing seat 1 is provided with an oil supply pore channel 11 communicated with the annular groove 8, and the width of the annular groove 8 is larger than that of an oil groove of the alternative spherical roller bearing. The hollow thread stop oil nozzle 12 is connected with the oil supply channel 11 through threads, a three-way oil path 15 is arranged inside the hollow thread stop oil nozzle 12, one end of the three-way oil path 15 is communicated with the oil supply channel 11, and the other two ends of the three-way oil path are communicated with the annular groove 8. The outer bearing sleeve 2 is provided with a radial hole 14, the hollow thread stop oil nozzle 12 comprises a cylindrical end 13, and the cylindrical end 13 is inserted into the radial hole 14 and is in clearance fit with the radial hole 14. Two tapered roller bearings 5 are arranged on the inner side of the outer bearing sleeve 2 side by side, the two tapered roller bearings 5 are arranged asymmetrically, and the outer ring of each tapered roller bearing 5 is in interference fit with the outer bearing sleeve 2. An outer bearing sleeve 2 between the outer rings of the two tapered roller bearings 5 protrudes to form an outer space ring 3, an inner space ring 6 is arranged between the inner rings of the two tapered roller bearings 5, and a step is arranged on the inner space ring 6. Four lubricating oil holes 7 are uniformly distributed on the outer bearing sleeve 2 along the circumference, one ends of the lubricating oil holes 7 are communicated with the annular groove 8, and the other ends of the lubricating oil holes are communicated with the inner side of the outer spacer ring 3.

The specific implementation process is as follows: when the tapered roller bearing is used, a positioning shaft shoulder is machined on the rotating shaft 10, the tail end of the rotating shaft 10 is connected with the shaft end baffle 4 through a bolt, the two tapered roller bearings 5 and the inner spacer ring 6 are located on the rotating shaft 10 between the positioning shaft shoulder and the shaft end baffle 4, and the inner rings of the tapered roller bearings 5 are in interference fit with the shaft. In the operation process of the rotating shaft 10, the two conical roller bearings 5 which are asymmetrically arranged are matched, so that the roller raceways are more fully contacted, the axial force is more properly borne, the condition that the contact is deviated from a unilateral bearing when the proportion of the axial load and the radial load is smaller is effectively avoided, and the early failure caused by abrasion of the unilateral raceway is avoided. Asymmetric arrangement is particularly suitable for a gear box running in a single direction, a row of wider rollers are used for bearing axial force, the service life distribution of two rows of rollers is more uniform, and compared with a symmetrically arranged double-row self-aligning or tapered roller bearing, the actual service life of the bearing can be greatly prolonged. In addition, the outer diameter fit size deviation of the outer bearing sleeve 2 is positive, compared with the outer diameter size of a spherical roller bearing under the same condition, the outer bearing sleeve 2 is larger, radial interference can be ensured after assembly, when the outer bearing sleeve 2 has a circumferential slip tendency and slides due to impact load or other reasons, the interference of the outer bearing sleeve and the bearing seat 1 can prevent the slip, and the circumferential slip of the bearing outer sleeve can be prevented due to the insertion fit of the cylindrical end 13 and the radial hole 14. Lubricating oil enters from the oil supply hole 11, enters the annular groove 8 through the three-way oil way 15 in the hollow thread stop oil nozzle 12, enters the lubricating oil hole 7 through the annular groove 8, enters the space between the two tapered roller bearings 5 from the lubricating oil hole 7 for lubrication, and the hollow thread stop oil nozzle 12 has the functions of positioning and lubricating.

The above description is only an example of the present invention, and the common general knowledge of the technical solutions or characteristics known in the solutions is not described herein too much. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, and these should also be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. An alternative bearing structure of spherical roller bearing which characterized in that: the bearing comprises a bearing seat, wherein an outer bearing sleeve is arranged on the inner side of the bearing seat in an interference fit manner, two tapered roller bearings are arranged in parallel on the inner side of the outer bearing sleeve, the outer rings of the tapered roller bearings are in interference fit with the outer bearing sleeve, and the inner rings of the tapered roller bearings are in interference fit with a shaft.

2. The alternative bearing structure of the spherical roller bearing according to claim 1, characterized in that: an outer bearing sleeve between the outer rings of the two tapered roller bearings protrudes to form an outer space ring, an inner space ring is arranged between the inner rings of the two tapered roller bearings, and steps are arranged on the inner space ring.

3. The alternative bearing structure of a spherical roller bearing according to claim 2, characterized in that: the two tapered roller bearings are arranged asymmetrically.

4. The alternative bearing structure of a spherical roller bearing according to claim 3, characterized in that: the bearing seat is provided with an oil supply hole channel communicated with the annular groove, and the width of the annular groove is larger than that of an oil groove of the alternative spherical roller bearing.

5. The alternative bearing structure of a spherical roller bearing according to claim 4, characterized in that: the oil supply device is characterized in that a hollow thread stop oil nozzle is connected to the oil supply hole in a threaded manner, a three-way oil path is arranged inside the hollow thread stop oil nozzle, one end of the three-way oil path is communicated with the oil supply hole, and the other two ends of the three-way oil path are communicated with the annular groove.

6. The alternative bearing structure of a spherical roller bearing according to claim 5, characterized in that: the outer bearing sleeve is provided with a radial hole, the hollow thread stop oil nozzle comprises a cylindrical end, the cylindrical end is inserted into the radial hole and is in clearance fit with the radial hole, the size of the radial hole is 0.05mm larger than that of the cylindrical end, and when the outer bearing sleeve rotates, the outer bearing sleeve is prevented from moving when the hole wall is contacted with the cylindrical end.

7. The alternative bearing structure of a spherical roller bearing according to claim 6, characterized in that: four lubricating oil holes are uniformly distributed on the outer bearing sleeve along the circumference, one end of each lubricating oil hole is communicated with the annular groove, and the other end of each lubricating oil hole is communicated with the inner side of the outer spacer ring.