Radial deviation prevention combined sealing ring for bearing

Abstract

The invention discloses a radial deviation prevention combined sealing ring for a bearing, which comprises a rubber sealing ring, the rubber sealing ring is provided with an annular sealing ring main body and an annular sealing limb connected with the annular sealing ring main body, the radial deviation prevention combined sealing ring further comprises an inner annular metal framework and an outer annular metal framework which are combined in a buckling manner, and the section shape of the inner annular metal framework and the outer annular metal framework is approximately rectangular when the inner annular metal framework and the outer annular metal framework are combined in a buckling manner; the inner annular metal framework comprises an inner mounting ring and an inner sealing ring, and the outer annular metal framework comprises an outer mounting ring and an outer sealing ring; the rubber sealing ring is vulcanized on the outer side of the inner sealing ring, the rubber sealing ring on the outer side of the inner sealing ring can be in sealing fit with the outer sealing ring, the rubber sealing ring on the inner side of the outer sealing ring is also vulcanized on the inner side of the outer sealing ring, and the rubber sealing ring on the inner side of the outer sealing ring can be in sealing fit with the inner sealing ring. After the bearing provided by the invention is applied, a good sealing effect can still be obtained even if a shaft generates radial deviation.

Description

Technical Field

[0001] The present invention relates to a sealing ring for a bearing, and more particularly to a combined sealing ring for preventing radial displacement of a bearing. Background Art

[0002] In the prior art, a rubber sealing ring is mainly used to seal a bearing. Figure 1 Figure 1 is a partial sectional view of the use state when a rubber sealing ring is used to seal a bearing in the prior art. In the figure, 51 is a shaft, 52 is a bearing, 53 is a bearing housing, 1 is a rubber sealing ring, which is arranged between the shaft and the bearing housing to seal the bearing, on the one hand, to prevent the leakage of lubricating oil inside the bearing, and on the other hand, to prevent external water vapor, dust and other sundries from entering the bearing interior.

[0003] The basic structure of the rubber sealing ring 1 in the above prior art includes an annular sealing ring body and an annular sealing limb connected to the annular sealing ring body. When in use, the annular sealing ring body is installed on the bearing housing, and the annular sealing limb forms a dynamic sealing fit with the shaft to achieve the purpose of sealing the bearing.

[0004] The problems existing in the rubber sealing ring in the above prior art during use are: when the shaft has a radial displacement, the sealing ring is squeezed to one side, and the sealing pressure on the other side becomes smaller, resulting in a poor sealing effect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a combined sealing ring for preventing radial displacement of a bearing that can still obtain a good sealing effect even when the shaft has a radial displacement.

[0006] To solve the above technical problem, a combined sealing ring for preventing radial displacement of a bearing according to the present invention includes a rubber sealing ring. The rubber sealing ring has an annular sealing ring body and an annular sealing limb connected to the annular sealing ring body. The characteristics are: it further includes inner and outer annular metal skeletons with an L-shaped cross-section that are snap-connected. When the inner and outer annular metal skeletons are snap-connected, their cross-sectional shape is approximately rectangular. The inner annular metal skeleton with an L-shaped cross-section includes an inner mounting ring and an inner sealing ring, and the outer annular metal skeleton with an L-shaped cross-section includes an outer mounting ring and an outer sealing ring; the rubber sealing ring is vulcanized on the outer side of the inner sealing ring, and the rubber sealing ring on the outer side of the inner sealing ring can form a sealing fit with the outer sealing ring, and the rubber sealing ring is also vulcanized on the inner side of the outer sealing ring, and the rubber sealing ring on the inner side of the outer sealing ring can form a sealing fit with the inner sealing ring.

[0007] During the assembly of the present invention, the inner mounting ring of the inner annular metal skeleton is in interference fit with the shaft, the outer mounting ring of the outer annular metal skeleton is in interference fit with the hole of the bearing housing, the rubber sealing ring on the outer side of the inner sealing ring forms a sealing fit with the outer sealing ring, and the rubber sealing ring on the inner side of the outer sealing ring forms a sealing fit with the inner sealing ring. When the shaft generates a radial offset, the inner annular metal skeleton also generates a corresponding offset amount. Correspondingly, the rubber sealing ring on the outer side of the inner sealing ring also generates a corresponding offset amount along the outer sealing ring. The rubber sealing ring will not be squeezed to one side and still forms a good sealing fit with the outer sealing ring. In the present invention, the rubber sealing ring on the outer side of the inner sealing ring forms a sealing fit with the outer sealing ring, and the rubber sealing ring on the inner side of the outer sealing ring forms a sealing fit with the inner sealing ring, forming a double seal with good sealing effect.

[0008] As an improvement of the present invention, wear-resistant ceramic layers are respectively compounded on the inner sealing surfaces of the outer sealing ring and the inner sealing ring that face each other. After adopting the technical feature of setting the wear-resistant ceramic layer, the service life of the outer sealing ring and the inner sealing ring can be extended.

[0009] As a further improvement of the present invention, a circumferential inner groove is formed on the inner side wall of the inner mounting ring, and an inner corrugated sealing ring is vulcanized in the inner groove; a circumferential outer groove is formed on the outer side wall of the outer mounting ring, and an outer corrugated sealing ring is vulcanized in the outer groove. After setting the inner and outer corrugated sealing rings, when the shaft or the hole has slight wear, good sealing effect can still be obtained during the assembly of the interference fit between the inner mounting ring and the shaft and the interference fit between the outer mounting ring and the hole of the bearing housing.

[0010] As another improvement of the present invention, a dust-proof sealing ring is vulcanized on the outer side surface of the inner sealing ring opposite to the inner sealing surface compounded with the wear-resistant ceramic layer, and the dust-proof sealing ring has a dust-proof lip. After adopting the above technical features, during use, a ring-shaped sealing cover that forms a sealing fit with the dust-proof lip needs to be installed on the bearing housing through screws, which can further prevent external dust from entering the bearing. Description of the Drawings

[0011] The present invention will be further described in detail below with reference to the drawings.

[0012] Figure 1 It is a partial sectional structural schematic diagram of the use state when a rubber sealing ring is used to seal a bearing in the prior art.

[0013] Figure 2 It is a main view partial sectional structural schematic diagram of a combined sealing ring for preventing radial offset of a bearing according to the present invention.

[0014] Figure 3 is Figure 2 an enlarged schematic diagram of the rubber sealing ring in , in which a V-shaped metal leaf spring is arranged between the ring-shaped sealing ring body and the ring-shaped sealing limb.

[0015] Figure 4 after the inner and outer corrugated sealing rings are provided Figure 2 .

[0016] Figure 5 after the inner and outer corrugated sealing rings are removed Figure 4 .

[0017] Figure 6 is a partial sectional view of the usage state when applying the sealed bearing of the present invention. In the figure, no dust-proof sealing ring is provided on the outer side surface of the inner sealing ring.

[0018] Figure 7 is a partial sectional view of the usage state when applying the sealed bearing of the present invention. In the figure, a dust-proof sealing ring is provided on the outer side surface of the inner sealing ring. Specific embodiments

[0019] First, refer to Figure 1 . Figure 1 is a partial sectional view of the usage state when a rubber sealing ring is used to seal a bearing in the prior art. In the figure, 51 is a shaft, 52 is a bearing, 53 is a bearing housing, and 1 is a rubber sealing ring, which is arranged between the shaft and the bearing housing to seal the bearing.

[0020] Next, refer to Figure 2 – Figure 5, a combined anti-radial offset seal ring for a bearing according to the present invention, includes a rubber seal ring 1. The rubber seal ring has an annular seal ring body 2 and an annular seal limb 3 connected to the annular seal ring body. It also includes internally and externally annular metal skeletons 10, 20 with an L-shaped cross-section that are snap-connected. When the internally and externally annular metal skeletons are snap-connected, their cross-sectional shape is approximately rectangular. The internally annular metal skeleton 10 with an L-shaped cross-section includes an inner mounting ring 11 on the inner side and an inner seal ring 12 on the outer side. The externally annular metal skeleton 20 with an L-shaped cross-section includes an outer mounting ring 21 on the outer side and an outer seal ring 22 on the inner side; the rubber seal ring 1 is vulcanized on the outer side of the inner seal ring 12, and the rubber seal ring on the outer side of the inner seal ring can form a sealing fit with the outer seal ring 22. The rubber seal ring is also vulcanized on the inner side of the outer seal ring 22, and the rubber seal ring on the inner side of the outer seal ring can form a sealing fit with the inner seal ring. Wear-resistant ceramic layers 30 are respectively compounded on the inner sealing surfaces of the outer seal ring 22 and the inner seal ring 12 that face each other. A circumferential inner groove 13 is provided on the inner side wall of the inner mounting ring 11, and an inner corrugated seal ring 14 is vulcanized in the inner groove; a circumferential outer groove 23 is provided on the outer side wall of the outer mounting ring 21, and an outer corrugated seal ring 24 is vulcanized in the outer groove. A dust-proof seal ring 9 is vulcanized on the outer side surface of the inner seal ring 12 that faces the inner sealing surface compounded with the wear-resistant ceramic layer 30. The dust-proof seal ring has a dust-proof lip 91. A V-shaped structure is formed between the annular seal ring body 2 and the annular seal limb 3, and a V-shaped metal leaf spring 101 is provided between the annular seal ring body and the annular seal limb for cooperation.

[0021] See again Figure 6 , Figure 6 is a partial cross-sectional structural schematic diagram of the use state when the present invention is applied to seal a bearing. In the figure, no dust-proof seal ring is provided on the outer side surface of the inner seal ring. When the present invention is applied to seal a bearing, the inner mounting ring of the internally annular metal skeleton is in interference fit with the shaft, and the outer mounting ring of the externally annular metal skeleton is in interference fit with the bearing housing.

[0022] Finally see Figure 7 , Figure 7 is a partial cross-sectional structural schematic diagram of the use state when the present invention is applied to seal a bearing. In the figure, a dust-proof seal ring is provided on the outer side surface of the inner seal ring. At this time, a ring-shaped seal cover 60 that cooperates with the dust-proof seal ring needs to be installed on the bearing housing 53 by screws 61, and the ring-shaped seal cover is in sealing fit with the dust-proof lip of the dust-proof seal ring.

[0023] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Any modification or equivalent replacement of the present invention to achieve the same technical effect is within the protection scope of the present invention.

Claims

1. A combined radial offset prevention sealing ring for a bearing, comprising a rubber sealing ring (1), the rubber sealing ring having an annular sealing ring body (2) and an annular sealing limb (3) connected to the annular sealing ring body, characterized in that: It further includes inner and outer annular metal skeletons (10, 20) with an L-shaped cross-section for snap connection. When the inner and outer annular metal skeletons are snap-connected, their cross-sectional shape is approximately rectangular. The inner annular metal skeleton (10) with an L-shaped cross-section includes an inner mounting ring (11) and an inner sealing ring (12), and the outer annular metal skeleton (20) with an L-shaped cross-section includes an outer mounting ring (21) and an outer sealing ring (22); the rubber sealing ring (1) is vulcanized on the outer side of the inner sealing ring (12), and the rubber sealing ring on the outer side of the inner sealing ring can form a sealing fit with the outer sealing ring (22). The rubber sealing ring (1) is also vulcanized on the inner side of the outer sealing ring (22), and the rubber sealing ring on the inner side of the outer sealing ring can form a sealing fit with the inner sealing ring (12).

2. The combined sealing ring for preventing radial offset of a bearing according to claim 1, characterized in that: Wear-resistant ceramic layers (30) are respectively compounded on the inner sealing surfaces of the outer sealing ring (22) and the inner sealing ring (12) that face each other.

3. The combined radial-offset prevention sealing ring for bearings according to claim 1 or 2, characterized in that: Circumferential inner grooves (13) are formed on the inner side wall of the inner mounting ring (11), and inner corrugated sealing rings (14) are vulcanized in the inner grooves; circumferential outer grooves (23) are formed on the outer side wall of the outer mounting ring (21), and outer corrugated sealing rings (24) are vulcanized in the outer grooves.

4. The anti-radial offset combined sealing ring for bearings according to claim 1, wherein: A dust-proof sealing ring (9) with a dust-proof lip (91) is vulcanized on the outer side surface of the inner sealing ring (12) opposite to the inner sealing surface compounded with the wear-resistant ceramic layer (30).

5. The combined radial-offset-preventing sealing ring for bearings according to claim 1, characterized in that: A V-shaped structure is formed between the annular sealing ring body (2) and the annular sealing limb (3), and a V-shaped metal leaf spring (101) is arranged between the annular sealing ring body and the annular sealing limb in a matching manner.

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