Split bearing for improving axial loading capacity of self-aligning roller bearing

Abstract

The utility model discloses a split bearing for improving the axial loading capacity of a self-aligning roller bearing, and belongs to the technical field of bearings. A split bearing for improving the axial loading capacity of a self-aligning roller bearing comprises a bearing outer ring and a bearing inner ring, the bearing outer ring comprises a left half outer ring and a right half outer ring, the bearing inner ring comprises two half inner rings, the two connecting ends of the left half outer ring and the right half outer ring are connected through two first hexagon socket screws respectively, and the two connecting ends of the left half outer ring and the right half outer ring are connected through two second hexagon socket screws respectively. The butt joint surfaces of the two half-and-half inner rings are in threaded connection through two positive and negative double-end studs respectively; compared with a traditional split type bearing, the split type bearing has the advantages that the structure is simple, fastening can be completed only through screws and bolts, meanwhile, the split type bearing is more suitable for being used in a high-altitude tower seat cabin, a wind power main shaft set with limited space and other working conditions, and the split type bearing has the advantages of being easy to install and replace and low in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field especially relates to a kind of split bearing for improving the axial load capacity of self-aligning roller bearing. BACKGROUND

[0002] With the promotion of renewable clean energy, a large number of wind turbines are being invested in various places. Currently, double-row self-aligning roller bearings are mainly used as wind turbine main shaft supporting structures. After several years of operation, some wind turbines have serious bearing damage, and most of the bearings have large-area flaking of the raceway, shaft rearward movement, and even damage to the rear gear box in severe cases. The damaged bearings are mostly double-row self-aligning roller bearings, and replacing or repairing the bearings accounts for a large part of the wind turbine maintenance cost.

[0003] The current mainstream method for repairing wind turbine bearings is to rent a heavy-duty tower crane to repair and remove the main shaft and replace the main bearing directly. Due to the cost of renting a tower crane, maintenance is generally carried out after three or more main bearings or gearboxes of the wind turbine are damaged. The maintenance cost is too high, and if a single wind turbine bearing is damaged, the device must be stopped, which increases the cost of using the wind turbine. Therefore, to solve the problem of insufficient axial load capacity of the self-aligning roller bearing and provide auxiliary recovery operation for the damaged self-aligning roller due to axial load, a split ball thrust bearing is provided, which is easy to install, has a simple structure, can be directly connected with the self-aligning roller bearing, and can bear a large axial load. SUMMARY

[0004] The utility model aims at solving the problems in the prior art and provides a split bearing for improving the axial load capacity of a self-aligning roller bearing.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A split bearing for improving the axial load capacity of a self-aligning roller bearing includes a bearing outer ring and a bearing inner ring. The bearing outer ring includes a left half outer ring and a right half outer ring, and the bearing inner ring includes two half inner rings. The two connecting ends of the left half outer ring and the right half outer ring are connected by two first inner hexagonal screws, and the abutting surfaces of the two half inner rings are connected by two positive and negative tooth double-headed studs.

[0007] In some embodiments, the installation direction of the two first inner hexagonal screws is opposite, and the left half outer ring and the right half outer ring are respectively provided with stepped bolt holes for installing and hiding the first inner hexagonal screws.

[0008] In some embodiments, U-shaped grooves for mounting outer ring connecting keys are respectively arranged in the butt joint surfaces of the left and right half outer rings, and the outer ring connecting keys are used to bear axial fixation.

[0009] In some embodiments, the connecting ends of the left and right half outer rings are threadedly connected by second inner hexagonal screws to the outer ring connecting keys.

[0010] In some embodiments, pin holes for mounting inner ring positioning pins are symmetrically arranged on the butt joint surfaces of the two half inner rings, and the connecting ends of the two half inner rings are positioned and connected by the two inner ring positioning pins.

[0011] In some embodiments, a plurality of axial threaded holes are arranged on the surfaces of the two half inner rings, and the half inner rings are threadedly connected with the inner ring of the self-aligning roller bearing.

[0012] Compared with the prior art, the split bearing for improving the axial load capacity of the self-aligning roller bearing has the following beneficial effects.

[0013] 1. Compared with the traditional split bearing, the split bearing has a simplified structure, can be fastened by only screws and bolts, is more suitable for use in high-altitude tower seat cabins and space-limited wind power main shaft groups and other working conditions, and has the advantages of easy installation, easy replacement and low manufacturing cost.

[0014] 2. The split bearing can share more than 70% of the axial force of the self-aligning roller bearing, effectively improves the service life of the main bearing, restores the use of the self-aligning roller bearing that has appeared with a retainer and a raceway wear, increases the service life of the newly installed self-aligning roller bearing by at least five years, can be installed and maintained on the wind turbine main shaft group alone, and can save more than 75% of the maintenance cost compared with the conventional method, and will not delay the operation of the wind turbine.

[0015] Other advantages, objects and features of the split bearing will be described in the subsequent description; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the split bearing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a front view structural schematic diagram of the split bearing.

[0017] Fig. 2 It is a bottom view sectional structural schematic diagram of the split bearing.

[0018] Fig. 3 It is a bottom view sectional structural schematic diagram of the half inner ring in the split bearing.

[0019] In the drawings:

[0020] 1. left half outer ring; 2. right half outer ring; 3. outer ring connecting key; 4. first inner hexagonal screw; 5. second inner hexagonal screw; 6. half inner ring; 7. double head stud with positive and reverse teeth; 8. inner ring positioning pin; 9. axial threaded hole; 10. steel ball. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0022] Referring to Figs. 1-3 A split bearing for improving the axial load capacity of a self-aligning roller bearing, comprising a bearing outer ring, a bearing inner ring, a retainer and steel balls 10, the steel balls 10 and the retainer are combined and installed between the bearing inner ring and the bearing outer ring to bear the load, the bearing outer ring comprises a left half outer ring 1 and a right half outer ring 2, the bearing inner ring comprises two half inner rings 6, the left half outer ring 1 and the right half outer ring 2 are both half circles, the two connecting ends of the left half outer ring 1 and the right half outer ring 2 are connected through two first inner hexagonal screws 4 respectively, the two first inner hexagonal screws 4 are arranged above and below the outer ring connecting key 3 respectively, the installation directions of the two first inner hexagonal screws 4 are opposite, and the surfaces of the left half outer ring 1 and the right half outer ring 2 are respectively provided with stepped bolt holes for installing and hiding the first inner hexagonal screws 4.

[0023] It can be understood that by splitting the inner ring and the outer ring of the bearing in half, it is convenient to install them at the rear of the self-aligning roller bearing, the left half outer ring 1 and the right half outer ring 2 are fixedly connected through the plurality of first inner hexagonal screws 4 and hidden in the stepped bolt holes, and the purpose of rapid installation is achieved.

[0024] Specifically, the U-shaped grooves for installing the outer ring connecting key 3 are respectively arranged in the butt joint surfaces of the left half outer ring 1 and the right half outer ring 2, the outer ring connecting key 3 is used for bearing axial fixation, the connecting ends of the left half outer ring 1 and the right half outer ring 2 are threadedly connected to the outer ring connecting key 3 through the second inner hexagonal screws 5, and the surfaces of the connecting ends of the left half outer ring 1 and the right half outer ring 2 are respectively provided with stepped bolt holes for installing and hiding the second inner hexagonal screws 5.

[0025] It can be understood that before the left half outer ring 1 and the right half outer ring 2 are fixed, the outer ring connecting key 3 is inserted into the U-shaped groove, and the second inner hexagonal screws 5 are used to fix the outer ring connecting key 3 inside the left half outer ring 1 and the right half outer ring 2, so as to achieve the purpose of preliminary positioning and installation of the left half outer ring 1 and the right half outer ring 2.

[0026] Specifically, the two half inner rings 6 are each a half circle, the abutting surfaces of the two half inner rings 6 are threadedly connected through two reverse-threaded stud bolts 7, the two reverse-threaded stud bolts 7 are respectively close to the top surface and the bottom surface of the half inner ring 6, a rotating ring is arranged in the middle of the reverse-threaded stud bolt 7, a plurality of insertion holes are arranged on the surface of the rotating ring, a plurality of slot holes for allowing the rotating ring to move are symmetrically arranged on the abutting surfaces of the two half inner rings 6, a plurality of pin holes for mounting inner ring positioning pins 8 are symmetrically arranged on the abutting surfaces of the two half inner rings 6, the connecting ends of the two half inner rings 6 are positioned and connected through the two inner ring positioning pins 8, the inner ring positioning pins 8 are arranged between the two reverse-threaded stud bolts 7 (as shown in FIG. Fig. 3 ), and a plurality of axial threaded holes 9 are arranged on the surfaces of the two half inner rings 6, the axial threaded holes 9 are used for threadedly connecting the half inner rings 6 and the inner ring of the self-aligning roller bearing.

[0027] It can be understood that the two half inner rings 6 are positioned by inserting the pin shaft into the pin hole, and the two half inner rings 6 are connected through the plurality of reverse-threaded stud bolts 7, a specific tool is inserted into the insertion hole, and the two half inner rings 6 are fastened through the rotating ring and the reverse-threaded stud bolts 7, and the inner ring is fixed on the inner ring of the self-aligning roller bearing through the plurality of long bolts and the plurality of axial threaded holes 9.

[0028] In the utility model, the inner ring is fixed on the inner ring of the self-aligning roller bearing through the plurality of long bolts and the plurality of axial threaded holes 9, and is installed as a supplementary part at the rear of the self-aligning roller bearing, the inner ring is fixed with the inner ring of the self-aligning roller bearing to bear the axial load, the outer ring is connected and fixed with the main bearing end cover through the gland and the long bolt, and simultaneously provides a certain pre-tightening force through the bolt and the disc washer, the pre-tightening force is opposite to the direction of the axial load, can share more than 70% of the axial force of the self-aligning roller bearing 70%, effectively improves the service life of the main bearing, simultaneously, the utility model can restore the use of the self-aligning roller bearing that has appeared the blocking ring and the raceway wear, and at least increases the service life of the newly installed self-aligning roller bearing by five years.

[0029] The above merely describes a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

[0030] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0031] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A split bearing for increasing the axial load capacity of a spherical roller bearing, comprising an outer bearing ring and an inner bearing ring, characterized in that, The bearing outer ring comprises a left half outer ring (1) and a right half outer ring (2), and the bearing inner ring comprises two half inner rings (6), the two connecting ends of the left half outer ring (1) and the right half outer ring (2) are connected through two first inner hexagonal screws (4) respectively, and the butt joints of the two half inner rings (6) are threadedly connected through two positive and negative tooth double-headed studs (7) respectively.

2. A split bearing for increasing the axial load capacity of a spherical roller bearing according to claim 1, characterized in that The mounting directions of the two first inner hexagonal screws (4) are opposite, and the surfaces of the left half outer ring (1) and the right half outer ring (2) are respectively provided with stepped bolt holes for mounting and hiding the first inner hexagonal screws (4).

3. A split bearing for increasing the axial load capacity of a spherical roller bearing according to claim 1, characterized in that, U-shaped grooves for mounting outer ring connecting keys (3) are respectively arranged in the butt joints of the left half outer ring (1) and the right half outer ring (2), and the outer ring connecting keys (3) are used for bearing axial fixation.

4. A split bearing for increasing the axial load capacity of a spherical roller bearing according to claim 3, characterized in that The connecting ends of the left half outer ring (1) and the right half outer ring (2) are threadedly connected to the outer ring connecting keys (3) through second inner hexagonal screws (5).

5. A split bearing for increasing the axial load capacity of a spherical roller bearing according to claim 1, wherein, Pin holes for mounting inner ring positioning pins (8) are symmetrically arranged on the butt joints of the two half inner rings (6), and the connecting ends of the two half inner rings (6) are positioned and connected through the two inner ring positioning pins (8).

6. A split bearing for increasing the axial load capacity of a spherical roller bearing according to claim 1, characterized in that, A plurality of axial threaded holes (9) are arranged on the surfaces of the two half inner rings (6), and the axial threaded holes (9) are used for threadedly connecting the half inner rings (6) and the inner rings of the self-aligning roller bearings.

Images