Novel floating thrust bearing structure

Abstract

The utility model discloses a novel floating thrust bearing structure which comprises a thrust bearing static ring and a thrust bearing moving ring, the thrust bearing static ring is used for being connected to a bearing seat, the thrust bearing moving ring is used for being connected to a motor rotor, the thrust bearing static ring is provided with a wear-resistant insert fixed with the thrust bearing static ring, and the wear-resistant insert is connected to the motor rotor. The wear-resistant insert is provided with an abutting face used for abutting against the bearing seat, the wear-resistant insert is additionally arranged to abut against the bearing seat, abrasion of the abutting face at the abutting position is reduced, the durability of the thrust bearing static ring is effectively improved, the aligning correction stability is ensured, the spherical groove makes contact with the abutting face of the thrust bearing static ring to form spherical contact, the load bearing capacity is large, and the service life of the thrust bearing static ring is prolonged. The rotation is flexible; and meanwhile, the spherical matching has a centering function and is convenient and reliable to mount.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to a novel floating thrust bearing structure. Background Art

[0002] The thrust bearing is an important component in the submersible motor. It mainly bears the rotor's deadweight and the axial thrust of the water pump when the motor is running. The quality of the thrust bearing directly affects the operating reliability and service life of the submersible motor.

[0003] After searching, the Chinese patent with publication number CN111810437A discloses an improved quick positioning thrust bearing for submersible pumps, including a thrust bearing seat and at least two thrust bearing blocks evenly distributed on the circumference of the thrust bearing seat, the thrust bearing seat is provided with a thrust bearing seat positioning column, the thrust bearing seat is provided with a thrust bearing seat protrusion with the same number as the thrust bearing block, the thrust bearing block is provided with a thrust bearing block boss on both sides, the thrust bearing block boss is provided with a thrust bearing block positioning hole, and the thrust bearing block positioning hole is sleeved on the thrust bearing seat positioning column. The thrust bearing block is accurately positioned by the thrust bearing seat positioning column passing through the thrust bearing block positioning hole, so that the thrust bearing block can neither fall off nor be offset at a certain angle.

[0004] However, in actual use, due to the point contact between the thrust bearing seat protrusion and the thrust bearing block, long-term contact is prone to wear, which affects the stability of subsequent self-aligning corrections and results in insufficient durability. Utility Model Content

[0005] In order to further improve durability, the present application provides a novel floating thrust bearing structure.

[0006] The present application provides a novel floating thrust bearing structure, which adopts the following technical solution:

[0007] A novel floating thrust bearing structure comprises a thrust bearing static ring and a thrust bearing dynamic ring, wherein the thrust bearing static ring is used to be connected to a bearing seat, and the thrust bearing dynamic ring is used to be connected to a motor rotor. The thrust bearing static ring is provided with a wear-resistant insert fixed thereto, and the wear-resistant insert has an abutting surface for abutting against the bearing seat.

[0008] Optionally, the wear-resistant insert is a metal part, and the wear-resistant insert has a buckle plate embedded in the static ring of the thrust bearing.

[0009] Optionally, the abutment surface is a spherical surface, and the bearing seat has a spherical groove that cooperates with the abutment surface.

[0010] Optionally, a concave guide groove is provided on a surface of one side where the static ring of the thrust bearing abuts against the dynamic ring of the thrust bearing.

[0011] Optionally, a plurality of guide grooves are evenly distributed around a circumference, and both ends of the guide grooves are penetrated.

[0012] Optionally, anti-rotation holes are provided on both sides of the static ring of the thrust bearing, and the bearing seat is provided with a cotter pin inserted into the anti-rotation hole, and the outer diameter of the cotter pin is smaller than the inner diameter of the anti-rotation hole.

[0013] Optionally, a blind hole is symmetrically provided at the bottom of the thrust bearing moving ring, a cotter pin connected to the motor rotor is inserted into the blind hole, and the inner diameter of the blind hole is larger than the outer diameter of the cotter pin.

[0014] Optionally, the outer ring of the wear-resistant insert has a ring edge, and the static ring of the thrust bearing has a ring groove that matches the ring edge.

[0015] Optionally, the bearing seat includes a thrust washer, and the thrust washer is in linear contact with the abutment surface.

[0016] Optionally, the abutting surface is a curved surface.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. By adding a wear-resistant insert to the static ring of the thrust bearing to abut against the bearing seat, the wear of the abutment surface at the abutment point is reduced, the durability of the static ring of the thrust bearing is effectively improved, and the stability of the self-aligning correction is ensured;

[0019] 2. A spherical groove is set on the bearing seat. The contact surface between the spherical groove and the static ring of the thrust bearing forms a spherical contact, which has a large load-bearing capacity and flexible rotation. At the same time, the spherical surface has a self-centering function, which makes installation convenient and reliable.

[0020] 3. The buckle is embedded into the static ring of the thrust bearing to form an integral whole, and the combination is more solid. At the same time, the wear-resistant insert on the static ring of the thrust bearing can be formed by sheet metal, and the wear-resistant insert can be produced separately, which is low in cost and high in manufacturing efficiency;

[0021] 4. Evenly distributed guide grooves are set on the end face of the static ring of the thrust bearing, so that the cooling and lubricating medium in the motor can fully contact the end face of the thrust bearing to form a water film or oil film, reducing wear and mechanical loss, and can discharge the particles generated by wear through the guide groove in time, and the heat dissipation performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall structural diagram of Example 1 applied to a motor.

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3It is a three-dimensional diagram of the wear-resistant insert in Example 1.

[0025] Figure 4 It is a structural diagram of the static ring of the thrust bearing in Example 1.

[0026] Figure 5 This is a structural diagram of Example 2.

[0027] Description of reference numerals:

[0028] 1. Thrust bearing static ring; 2. Thrust bearing dynamic ring; 3. Bearing seat; 4. Motor rotor; 5. Rotating shaft; 6. Wear-resistant insert; 7. Abutment surface; 8. Spherical groove; 9. Buckle; 10. Center hole; 11. Stop hole; 12. Split pin; 13. Ring edge; 14. Ring groove; 15. Blind hole; 16. Guide groove; 17. Thrust washer; 18. Contact surface. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] Example 1

[0031] A new floating thrust bearing structure, such as Figure 1 and Figure 2 As shown, it is mainly used in motors, including a thrust bearing static ring 1 and a thrust bearing dynamic ring 2. A bearing seat 3 and a motor rotor 4 are provided in the motor. The thrust bearing static ring 1 is located below the thrust bearing dynamic ring 2 and is connected to the bearing seat 3. The top of the thrust bearing dynamic ring 2 is connected to the motor rotor 4. The motor rotor 4 has a rotating shaft 5, which passes through the thrust bearing static ring 1 and the thrust bearing dynamic ring 2.

[0032] like Figure 2 and Figure 3 As shown, a wear-resistant insert 6 is provided on the side of the thrust bearing static ring 1 close to the bearing seat 3. The thrust bearing static ring 1 adopts a graphite block, and the wear-resistant insert 6 is a metal insert, which can be specifically made of wear-resistant materials such as stainless steel. The wear-resistant insert 6 has a convex spherical surface on the side close to the bearing seat 3, and a spherical groove 8 that cooperates with the spherical surface is provided on the bearing seat 3. The abutment surface 7 formed on the spherical surface abuts against the inner wall of the spherical groove 8. The spherical contact has a large load-bearing capacity and flexible rotation, and the spherical surface cooperation has a centering function, which is convenient and reliable to install. The actual contact surface is a metal insert, which has good wear resistance and is not prone to wear and damage, thereby extending the service life. Moreover, the wear-resistant insert 6 is an independent component and can be processed by sheet metal alone, which is convenient for production and manufacturing.

[0033] like Figure 2 and Figure 3As shown, the wear-resistant insert 6 is provided with a snap plate 9 embedded in the static ring 1 of the thrust bearing. A plurality of snap plates 9 are evenly distributed around the circumference. The snap plates 9 are formed by cutting a U-shaped cutting line on the wear-resistant insert 6 and then turning the inner area of ​​the U-shaped cutting line inward. The processing is simple and convenient. The snap plate 9 itself is a part of the wear-resistant insert 6. The snap plate 9 is embedded in the static ring 1 of the thrust bearing to form an integrated whole. The combination is more firm and has the advantage of high manufacturing efficiency.

[0034] like Figure 2 and Figure 3 As shown, a center hole 10 is opened at the center of the wear-resistant insert 6, and the inner diameter of the center hole 10 is larger than the outer diameter of the rotor. The center hole 10 is used for the rotating shaft 5 to pass through and the static ring 1 of the thrust bearing to float and cause the center hole 10 to be offset. In addition, stop holes 11 are opened on both sides of the static ring 1 of the thrust bearing, and a cotter pin 12 inserted into the stop hole 11 is fixedly arranged on the bearing seat 3. The outer diameter of the cotter pin 12 is smaller than the inner diameter of the stop hole 11 to form a movable margin, and the circumferential limitation of the static ring 1 of the thrust bearing is achieved by means of the cooperation between the cotter pin 12 and the stop hole 11. There is an annular edge 13 on the outer periphery of the wear-resistant insert 6, and the static ring 1 of the thrust bearing has an annular groove 14 that cooperates with the annular edge 13. The wear-resistant insert 6 is wrapped with the help of the annular edge 13 to improve the wrapping and the firmness of the connection between the two.

[0035] like Figure 2 As shown, blind holes 15 are symmetrically arranged at the bottom of the thrust bearing movable ring 2, and the motor rotor 4 is provided with a cotter pin 12 connected and fixed thereto, and the bottom end of the cotter pin 12 is inserted into the blind hole 15 to realize circumferential linkage, that is, the rotation of the motor rotor 4 drives the thrust bearing movable ring 2 to rotate therewith, and the bottom end face of the thrust bearing movable ring 2 abuts against the top wall of the thrust bearing static ring 1 to form a friction pair end face, and the aperture of the blind hole 15 is larger than the outer diameter of the cotter pin 12 to form a movable margin of the thrust bearing static ring 1 relative to the motor rotor 4.

[0036] like Figure 4 As shown, a concave guide groove 16 is provided on one side surface where the static ring 1 of the thrust bearing abuts against the dynamic ring 2 of the thrust bearing. Both ends of the guide groove 16 are penetrated, and a plurality of guide grooves 16 are evenly distributed around the circumference, so that the cooling and lubricating medium in the motor can fully contact with the end face of the thrust bearing to form a water film or an oil film, thereby reducing wear and mechanical loss, and can timely discharge particles generated by wear through the guide groove 16, while improving the heat dissipation performance.

[0037] Example 2

[0038] A new floating thrust bearing structure, such as Figure 5As shown, the main difference between it and embodiment 1 is that the bearing seat 3 is provided with a thrust washer 17, the cotter pin 12 passes through the thrust washer 17 to fix it on the bearing seat 3, the thrust washer 17 has a curved contact surface 18, the abutment surface 7 on the wear-resistant insert 6 abuts against the contact surface 18 to form a line contact, and a gap is left between the wear-resistant insert 6 and the thrust washer 17 at the bottom of the thrust bearing static ring 1, and the floating of the thrust bearing static ring 1 is formed by line contact.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new floating thrust bearing structure, characterized in that: The thrust bearing comprises a static ring (1) and a dynamic ring (2) of the thrust bearing, wherein the static ring (1) of the thrust bearing is used to be connected to a bearing seat (3), and the dynamic ring (2) of the thrust bearing is used to be connected to a motor rotor (4), and the static ring (1) of the thrust bearing is provided with a wear-resistant insert (6) fixed thereto, and the wear-resistant insert (6) has an abutting surface (7) for abutting against the bearing seat (3).

2. A novel floating thrust bearing structure according to claim 1, characterized in that: The wear-resistant insert (6) is a metal part, and the wear-resistant insert (6) has a buckle plate (9) embedded in the static ring (1) of the thrust bearing.

3. A novel floating thrust bearing structure according to claim 1, characterized in that: The abutment surface (7) is a spherical surface, and the bearing seat (3) is provided with a spherical groove (8) that cooperates with the abutment surface (7) to abut.

4. A novel floating thrust bearing structure according to claim 1, characterized in that: A concave guide groove (16) is provided on the surface of one side of the thrust bearing static ring (1) abutting against the thrust bearing dynamic ring (2).

5. A novel floating thrust bearing structure according to claim 4, characterized in that: A plurality of guide grooves (16) are evenly distributed around the circumference, and both ends of the guide groove (16) are penetrated.

6. A novel floating thrust bearing structure according to claim 1, characterized in that: The thrust bearing static ring (1) is provided with anti-rotation holes (11) on both sides, and the bearing seat (3) is provided with a split pin (12) inserted into the anti-rotation hole (11), and the outer diameter of the split pin (12) is smaller than the inner diameter of the anti-rotation hole (11).

7. A novel floating thrust bearing structure according to claim 1, characterized in that: A blind hole (15) is symmetrically arranged at the bottom of the thrust bearing movable ring (2), a split pin (12) connected to the motor rotor (4) is inserted into the blind hole (15), and the inner diameter of the blind hole (15) is larger than the outer diameter of the split pin (12).

8. The novel floating thrust bearing structure according to claim 1 is characterized in that: The outer ring of the wear-resistant insert (6) has an annular edge (13), and the static ring (1) of the thrust bearing has an annular groove (14) that matches the annular edge (13).

9. A novel floating thrust bearing structure according to claim 1, characterized in that: The bearing seat (3) comprises a thrust washer (17), and the thrust washer (17) is in line contact with the abutment surface (7).

10. A novel floating thrust bearing structure according to claim 1, characterized in that: The abutting surface (7) is a curved surface.

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