Tooth-shaped sealing structure of bearing sealing ring

Abstract

The utility model discloses a tooth-shaped sealing structure of a bearing sealing ring, which comprises a sealing ring arranged between a bearing inner ring and a bearing outer ring, a sealing ring outer lip is arranged on the edge of the radial outer side of the sealing ring, a metal framework is arranged in the sealing ring, and a sealing ring outer lip is arranged on the metal framework. A sealing tooth groove is formed in the position, close to the end face, of the radial outer side of the bearing inner ring, an inwards-concave outer sealing face is arranged at the position, connected with the end face, of the radial outer side of the bearing inner ring, and sealing convex teeth are formed between the sealing tooth groove and the outer sealing face. The radial inner side end of the sealing ring is provided with a grease sealing lip extending into the sealing tooth groove and an outer sealing lip extending to the outer sealing face to be attached to the outer sealing face. The sealing structure can solve the problem that the sealing performance of an existing sealing structure can be greatly reduced under the condition that the surface of the sealing ring bears external airflow or mixed liquid with pressure, dust and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a toothed sealing structure of a bearing sealing ring. Background Art

[0002] In industrial applications, where high requirements are placed on the bearing sealing performance, a double-sided contact seal structure is usually used. This seal structure is usually an axial contact seal structure with a V-shaped seal groove on the inner ring or a radial contact seal structure with no seal groove on the inner ring.

[0003] The inner ring adopts an axial contact seal structure with a V-shaped seal groove, which has a good sealing effect in most applications. However, in some special applications, such as when the seal ring surface is subjected to external airflow or pressurized mixed liquids, dust, etc., the inner ring V-shaped seal groove cannot support the inner lip of the seal ring, and the external seal lip is prone to dents. Mixed liquids, dust, etc. will enter the seal groove, causing the seal ring to wear faster and lose its sealing performance.

[0004] The radial contact seal structure without sealing groove in the inner ring has good radial sealing performance and small friction because the inner ring sealing surface is usually ground and has good sealing surface roughness and dimensional accuracy. However, due to the lack of sealing groove in the inner ring, axial support for the inner lip of the sealing ring cannot be achieved. When the sealing ring surface is subjected to external airflow or pressurized mixed liquid, dust, etc., the sealing performance will be greatly reduced. Utility Model Content

[0005] The utility model provides a toothed sealing structure of a bearing sealing ring, which can solve the problem that the sealing performance of the existing sealing structure will be greatly reduced when the sealing ring surface is subjected to external airflow or pressurized mixed liquid, dust and the like.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tooth-shaped sealing structure of a bearing sealing ring, comprising a sealing ring arranged between a bearing inner ring and a bearing outer ring, a sealing ring outer lip being arranged on the radial outer edge of the sealing ring, a metal skeleton being arranged inside the sealing ring, a sealing tooth groove being arranged on the radial outer side of the bearing inner ring near the end face, an inwardly concave outer sealing surface being arranged at the position where the radial outer side of the bearing inner ring is connected to the end face, a sealing convex tooth being formed between the sealing tooth groove and the outer sealing surface, and a grease sealing lip extending into the sealing tooth groove and an outer sealing lip extending to fit the outer sealing surface being arranged on the radial inner end of the sealing ring.

[0007] Preferably, the grease sealing lip is in contact with an inner sealing surface inside the sealing groove away from the end face of the inner ring of the bearing.

[0008] Preferably, a gap is left between the outer sealing lip and the outer sealing surface of the sealing protruding tooth.

[0009] Preferably, the angle α between the grease sealing lip and the outer sealing lip is 60° to 80°.

[0010] Preferably, the angle β between the side walls of the sealing protruding teeth is 35° to 60°.

[0011] Preferably, the angle δ between the outer sealing surface of the sealing convex tooth and the end surface of the bearing inner ring is 10° to 30°.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By arranging an inverted V-shaped grease sealing lip and an outer sealing lip on the radial inner side of the sealing ring to fit and seal with the sealing tooth groove in both the axial and radial directions at the same time, a long tooth-shaped meshing sealing path is formed. At the same time, the sealing convex teeth provide good axial support for the outer sealing lip. When the sealing lip is subjected to external pressure, it can fit better with the sealing convex teeth, thereby greatly improving the bearing sealing performance and extending the bearing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial cross-sectional structural diagram of the utility model. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] like Figure 1 As shown, the utility model provides a toothed sealing structure of a bearing sealing ring, comprising a sealing ring 3 arranged between a bearing inner ring 2 and a bearing outer ring, a sealing ring outer lip 31 being arranged on the radial outer edge of the sealing ring 3, a metal skeleton 32 being arranged inside the sealing ring 3, a sealing tooth groove 25 being arranged on the radial outer side of the bearing inner ring 2 near the end face, an inwardly concave outer sealing surface 21 being arranged at the position where the radial outer side of the bearing inner ring 2 is connected to the end face, a sealing convex tooth 23 being formed between the sealing tooth groove 25 and the outer sealing surface 21, and a grease sealing lip 34 extending into the sealing tooth groove 25 and an outer sealing lip 33 extending to fit the outer sealing surface 21 being arranged on the radial inner end of the sealing ring 3.

[0017] Specifically, the sealing ring 3 is an annular rubber sealing ring, and the cross-section of the outer lip 31 of the sealing ring is trapezoidal, which cooperates with the sealing groove of the outer ring of the bearing, fixes the sealing ring 3 on the outer ring of the bearing, and blocks the end of the gap between the outer ring of the bearing and the inner ring 2 of the bearing. The grease lip 34 and the outer sealing lip 33 on the radial inner side of the sealing ring 3 are arranged in an inverted V shape, wherein the angle α between the grease lip 34 and the outer sealing lip 33 is 60°~80°, and the grease lip 34 and the outer sealing lip 33 wrap the sealing convex tooth 23, wherein the grease lip 34 is in contact with the inner sealing surface 26 inside the sealing tooth groove 25 away from the end face of the inner ring 2 of the bearing, and the axial contact amount is 0~0.15mm.

[0018] The radial contact amount between the outer sealing lip 33 and the outer sealing surface 21 is 0 to 0.15 mm, which can ensure the sealing performance.

[0019] In this embodiment, a gap is left between the outer sealing lip 33 and the outer sealing surface 22 of the sealing protruding tooth 23. When the outer sealing lip 33 is impacted, the outer sealing lip 33 can be pressed against the outer sealing surface 22 to achieve a supporting effect.

[0020] In this embodiment, the angle β between the side walls of the sealing convex tooth 23 is 35°~60°, the angle δ between the outer sealing surface 22 of the sealing convex tooth 23 and the end surface of the bearing inner ring 2 is 10°~30°, the distance A between the outer diameter of the bearing inner ring 2 and the outer sealing surface 21 is 0.5~1.3mm, the distance B from the outer diameter of the bearing inner ring 2 to the tooth bottom 24 of the sealing tooth groove 25 is 0.4~1mm, the angle γ between the outer diameter of the bearing inner ring 2 and the inner sealing surface 26 is 90~100°, and the distance C from the outer diameter of the bearing inner ring 2 to the tooth top of the sealing convex tooth 23 is 0~0.5mm.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A toothed sealing structure of a bearing sealing ring, comprising a sealing ring (3) arranged between a bearing inner ring (2) and a bearing outer ring, wherein a sealing ring outer lip (31) is arranged at a radial outer edge of the sealing ring (3), and a metal frame (32) is arranged inside the sealing ring (3), characterized in that: A sealing tooth groove (25) is arranged on the radial outer side of the bearing inner ring (2) near the end face, an inwardly concave outer sealing surface (21) is arranged on the radial outer side of the bearing inner ring (2) where it is connected to the end face, a sealing convex tooth (23) is formed between the sealing tooth groove (25) and the outer sealing surface (21), and a grease sealing lip (34) extending into the sealing tooth groove (25) and an outer sealing lip (33) extending to fit the outer sealing surface (21) are arranged on the radial inner end of the sealing ring (3).

2. The toothed sealing structure of the bearing sealing ring according to claim 1, characterized in that: The grease sealing lip (34) is in contact with an inner sealing surface (26) inside the sealing tooth groove (25) and away from the end surface of the bearing inner ring (2).

3. The toothed sealing structure of the bearing sealing ring according to claim 1, characterized in that: A gap is left between the outer sealing lip (33) and the outer sealing surface (22) of the sealing protruding tooth (23).

4. The toothed sealing structure of the bearing sealing ring according to claim 1, characterized in that: The angle α between the grease sealing lip (34) and the outer sealing lip (33) is 60° to 80°.

5. The toothed sealing structure of the bearing sealing ring according to claim 1, characterized in that: The angle β between the side walls of the sealing protruding teeth (23) is 35° to 60°.

6. The toothed sealing structure of a bearing sealing ring according to claim 2, characterized in that: The included angle δ between the outer sealing surface (22) of the sealing protruding tooth (23) and the end surface of the bearing inner ring (2) is 10° to 30°.

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