Double-row angular contact hub bearing

Abstract

The utility model relates to the field of bearings, in particular to a double-row angular contact hub bearing. The double-row angular contact hub bearing comprises an outer ring, an inner ring, a steel ball, a retainer, a sealing cover and a sealing ring, the steel ball is arranged between the outer ring and the inner ring, the retainer is arranged on the steel ball, a gap is arranged between the outer side of the outer ring and the outer side of the inner ring, the sealing ring is arranged on the gap, and the sealing cover is arranged outside the sealing ring. The utility model has the beneficial effects that the inner lip sealing groove is optimally designed, the angle of the contact inclined plane is increased to 20, good contact of the inner lip of the sealing ring is ensured, the frictional resistance is reduced, and high temperature is avoided when the bearing works, so that the service life of the bearing is prolonged; the sealing cover is optimally designed and is made of ACM rubber, and the retainer is made of an imported SPCC material; a first lip of an inner lip of the sealing cover is in rabbet-diameter contact with the inner ring sealing ring, a second lip is in inclined surface contact with the dustproof groove, and the torque is 0.010-0.028 N.m; foreign matters such as water are prevented from entering the bearing.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and in particular to double-row angular contact turbine hub bearings. Background Technology

[0002] Specific bearings are required in turbine hubs. The conventional design involves the inner lip of the composite cover contacting the inner ring dustproof groove, which results in poor sealing and risks of grease leakage and water ingress into the bearing. It also has problems such as high cost, low efficiency, and time consumption. Summary of the Invention

[0003] To solve the aforementioned technical problems of grease leakage and water ingress, this utility model provides a double-row angular contact turbine hub bearing.

[0004] The technical solution of this utility model is as follows:

[0005] A double-row angular contact turbine hub bearing includes an outer ring, an inner ring, steel balls, a cage, a sealing cap, and a sealing ring. Steel balls are provided between the outer ring and the inner ring, and a cage is provided on the steel balls. There is a gap between the outer ring and the outer ring, and a sealing ring is provided on the gap. A sealing cap is provided outside the sealing ring.

[0006] The outer ring has a convex circle at its center, and an arc-shaped groove on the outside of the convex circle. A steel ball is arranged around the arc-shaped groove, and two retainers are provided on the steel ball.

[0007] The outer wall of the inner ring consists of a smooth wall, an arc-shaped wall, and a limiting wall from the outside to the inside. A sealing ring is provided inside the smooth wall, the arc-shaped wall contacts the steel ball, and a retainer is provided on the inner side of the limiting wall.

[0008] The sealing cap is made of ACM rubber, and the retainer is made of imported SPCC material.

[0009] The bottom of the sealing ring contacts the inner wall of the outer ring. A notch is provided on the outer side of the inner wall of the outer ring. A convex ring is provided on the outer wall of the sealing ring, and the convex ring is engaged with the notch. The cross-section of the sealing cover is inverted L-shaped. The bottom of the sealing ring is located between the outer ring and the sealing cover. The outer wall of the sealing cover and the outer wall of the inner ring are tightly fitted. The side wall of the sealing cover contacts the inclined surface of the dustproof groove of the sealing ring.

[0010] The angle of the inclined surface of the dustproof groove is increased to 20º.

[0011] The technical solution of this utility model features a novel structure and a clever and simple design. The inner lip sealing groove is optimized, and the contact tilt angle is increased to 20º to ensure good contact of the inner lip of the sealing ring. At the same time, it reduces frictional resistance and avoids high temperatures during bearing operation, thereby improving the bearing's service life. The sealing cover is also optimized, using ACM rubber, and the cage is made of imported SPCC material. The first lip of the inner lip of the sealing cover contacts the diameter of the inner ring sealing ring, and the second lip contacts the inclined surface of the dustproof groove, with a torque of 0.010~0.028Nm. This prevents water and other foreign objects from entering the bearing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0014] like Figure 1 The double-row angular contact turbine hub bearing shown includes an outer ring 1, an inner ring 2, steel balls 4, a cage 3, a sealing cover 8, and a sealing ring 7. The steel balls 4 are provided between the outer ring 1 and the inner ring 2, and the cage 3 is provided on the steel balls 4. There is a gap between the outer ring 1 and the outer ring 2, and the sealing ring 7 is provided on the gap. The sealing cover 8 is provided outside the sealing ring 7.

[0015] The outer ring 1 has a convex circle at its center, and an arc groove on the outside of the convex circle. A steel ball 4 is arranged around the arc groove, and two retainers 3 are respectively provided on the steel ball 4.

[0016] The outer wall of the inner ring 2 consists of a smooth wall, an arc-shaped wall, and a limiting wall from the outside to the inside. A sealing ring 7 is provided inside the smooth wall, the arc-shaped wall contacts the steel ball 4, and a retainer 3 is provided on the inner side of the limiting wall.

[0017] The sealing cap 8 is made of ACM rubber, and the retainer 3 is made of imported SPCC material.

[0018] The bottom of the sealing ring 7 contacts the inner wall of the outer ring 1. The outer side of the inner wall of the outer ring 1 has a notch. The outer wall of the sealing ring 7 has a convex ring that is engaged in the notch. The sealing cover 8 has an inverted L-shaped cross section. The bottom of the sealing ring 7 is located between the outer ring 1 and the sealing cover 8. The outer wall of the sealing cover 8 and the outer wall of the inner ring 2 are tightly fitted. The side wall of the sealing cover 8 contacts the inclined surface of the dustproof groove of the sealing ring 7.

[0019] The angle of the inclined surface of the dustproof groove is increased to 20º.

[0020] During use, the angle between the bottom inclined surface a5 of the inner ring 2 and the horizontal plane is 15°. The middle part of the inner ring 2 is inclined inward, and the angle between the inclined surface b6 and the vertical plane is 60°. Before pressing the sealing ring 7, apply a small amount of grease to the lip to reduce friction. The sealing ring 7 is stuck on the notch, and the tip of the sealing ring 7 is stuck on the sealing cover 8. It is also secured by the dustproof groove, making the structure firm. The sealing cover 8 and the sealing ring 7 work together to protect the bearing, providing a large protective area and preventing water and other foreign objects from entering the bearing.

[0021] It should be understood that the above description is only a preferred embodiment of the present utility model and is not sufficient to limit the technical solution of the present utility model. For those skilled in the art, within the spirit and principles of the present utility model, additions, subtractions, substitutions, transformations or improvements can be made based on the above description, and all such additions, subtractions, substitutions or improvements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. Double row angular contact turbine hub bearing comprising an outer ring (1), an inner ring (2), steel balls (4), a cage (3), a sealing cover (8) and a sealing ring (7), characterized in that: The outer ring (1) and the inner ring (2) are provided with steel balls (4), the steel balls (4) are provided with retainers (3), the outer ring (1) and the inner ring (2) are provided with a gap between the outer sides, the gap is provided with a sealing ring (7), the sealing ring (7) is provided with a sealing cover (8) outside, the bottom of the sealing ring (7) is in contact with the inner wall of the outer ring (1), the outer side of the inner wall of the outer ring (1) is provided with a notch, the outer wall of the sealing ring (7) is provided with a convex ring, the convex ring is clamped on the notch, the cross section of the sealing cover (8) is inverted L-shaped, the bottom of the sealing ring (7) is located between the outer ring (1) and the sealing cover (8), the outer wall of the sealing cover (8) is tightly combined with the outer wall of the inner ring (2), the side wall of the sealing cover (8) is in contact with the inclined surface of the dustproof groove of the sealing ring (7), the center of the outer ring (1) is provided with a convex circle, the outer side of the convex circle is an arc-shaped groove, the steel balls (4) are arranged around the arc-shaped groove, and two retainers (3) are respectively arranged on the steel balls (4).

2. The double-row angular contact turbine hub bearing of claim 1, wherein: The outer wall of the inner ring (2) is a smooth wall, an arc-shaped wall and a limiting wall from outside to inside, the smooth wall is provided with a sealing ring (7) inside, the arc-shaped wall is in contact with the steel ball (4), and the limiting wall is provided with a retainer (3) inside.

3. The dual-row angular contact turbine hub bearing of claim 1, wherein: The sealing cover (8) is made of ACM rubber, and the retainer (3) is made of imported SPCC material.

4. The dual-row angular contact turbine hub bearing of claim 1, wherein: The angle of the dustproof groove inclined surface is increased to 20º.

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