A double-lip rotating end face dust seal

Abstract

The utility model discloses a double-lip rotary end face dustproof ring, comprising: a sealing ring, the sealing ring comprising an outer ring, an inner ring, and a connecting portion, the connecting portion connecting the outer ring and the inner ring on one side, a gap being provided between the outer ring and the inner ring, the outer ring, the inner ring, and the connecting portion forming an annular groove with one end open, the outer circumferential surface of the outer ring being provided with at least one outer sealing lip, and the inner circumferential surface of the inner ring being provided with at least one inner sealing lip. The sealing of the sealing cover on the end face is realized, and the overall sealing effect of the roller is improved.

Description

Technical Field

[0001] The utility model relates to the field of steel smelting, in particular to a double-lip rotary end face dustproof ring. Background Art

[0002] At present, the seal used for the arch-type rolling mill roll is a labyrinth seal with a skeleton oil seal and a dust ring. The dust ring is designed on the internal end face, which makes it difficult to achieve its installation accuracy. The environment of this roll is a water-cooled environment containing impurities. The dust ring is built-in, and its wear condition cannot be judged. In addition, the sealing effect of this structure is poor, and the groove form is easy to accumulate impurities. When the roll rotates, the impurities follow the water flow into the sealing component, causing damage to the sealing component. Utility Model Content

[0003] The utility model aims to provide a double-lip rotary end face dustproof ring, which can realize the sealing of the sealing cover on the end face and improve the overall sealing effect of the roller.

[0004] A double-lip rotary end face dust ring comprises: a sealing ring, wherein the sealing ring comprises an outer ring, an inner ring, and a connecting portion, wherein the connecting portion connects the outer ring and the inner ring on one side, a gap is provided between the outer ring and the inner ring, the outer ring, the inner ring, and the connecting portion constitute an annular groove with an open end, the outer circumferential surface of the outer ring is provided with at least one outer sealing lip, and the inner circumferential surface of the inner ring is provided with at least one inner sealing lip.

[0005] In one of the embodiments, the outer peripheral surface of the outer ring is provided with at least two outer sealing lips arranged at intervals.

[0006] In one embodiment, among the layers of the outer sealing lips, outer sides of at least two of the outer sealing lips are opened to each other in a V shape.

[0007] In one of the embodiments, a root portion of the outer sealing lip closest to the opening of the annular groove is connected to an edge of the opening of the annular groove.

[0008] In one of the embodiments, the inner circumferential surface of the inner ring is provided with at least two inner sealing lips arranged at intervals.

[0009] In one embodiment, among the inner sealing lips of each layer, inner sides of at least two of the inner sealing lips are opened to each other in a V shape.

[0010] In one of the embodiments, a root portion of the inner sealing lip closest to the opening of the annular groove is connected to an edge of the opening of the annular groove.

[0011] In one embodiment, the connecting portion seals one end of the annular groove.

[0012] In one of the embodiments, the double-lip rotary end face dust ring further includes an outer hoop, which is sleeved on the outer circumference of the outer ring; or / and, further includes an inner hoop, which is sleeved on the inner circumference of the inner ring.

[0013] In one embodiment, the outer hoop is located between the outer sealing lip and the connecting portion; or / and, the inner hoop is located between the inner sealing lip and the connecting portion.

[0014] Compared with the prior art, the double-lip rotary end face dust seal of the utility model has the following advantages:

[0015] 1. A dustproof ring is installed at the end of the sealing cover to keep water and impurities out of the labyrinth seal, avoid the accumulation of impurities, and reduce the probability of abnormal damage to the internal seal.

[0016] 2. The sealing ring includes an outer sealing lip and an inner sealing lip, and is arranged as a V-shaped double-lip mouth with double outer sealing lips and double inner sealing lips. The sealing ring can rotate relative to the groove of the shaft seal to achieve internal and external 4-point sealing on the rotating end face, thereby enhancing the sealing ability.

[0017] 3. The inner and outer hoops are used to install and fix the sealing ring, which can resist certain axial disturbances, adapt to the large load requirements of the rolling mill, and maintain the sealing effect.

[0018] 4. The dust ring is located at the end of the sealing cover and can be observed from the outside, which is helpful for understanding the sealing status and discovering sealing defects in time.

[0019] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a double-lip rotary end face dust ring installed on a sealing cover in an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a double-lip rotary end face dustproof ring according to an embodiment of the utility model.

[0023] Among them, 10, sealing ring, 11, inner ring, 111, inner sealing lip, 12, connecting part, 13, outer ring, 131, outer sealing lip, 14, annular groove, 141, opening of the annular groove, 20, sealing cover, 30, bearing, 40, roller, 41, shaft seal, 51, inner hoop, 52, outer hoop. DETAILED DESCRIPTION

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In this embodiment, Figure 1 , 2 As shown, the end of the roller 40 is provided with a shaft seal 41 and a bearing 30, and the bearing is provided with a sealing cover 20. The shaft seal 41 is installed on the inner sleeve of the bearing 30, and the sealing cover is installed on the outer sleeve of the bearing 30.

[0028] A double-lip rotary end face dust ring comprises: a sealing ring 10, the sealing ring 10 comprises an outer ring 13, an inner ring 11, and a connecting portion 12, the connecting portion 12 connects the outer ring 13 and the inner ring 11 on one side, a gap is provided between the outer ring 13 and the inner ring 11, the outer ring 13, the inner ring 11, and the connecting portion 12 form an annular groove 14 with an opening at one end, the outer circumferential surface of the outer ring 13 is provided with at least one outer sealing lip 131, and the inner circumferential surface of the inner ring 11 is provided with at least one inner sealing lip 111.

[0029] The end face of the sealing cover 20 is a raised ring, the end of the sealing cover 20 is inserted into the groove of the shaft seal 41, the sealing ring 10 is sleeved on the end of the sealing cover 20 through the annular groove 14, the end of the sealing cover 20 is inserted into the annular groove 14, the outer sealing lip 131 abuts against the outer side of the groove of the shaft seal 41, and the inner sealing lip 111 abuts against the inner side of the groove of the shaft seal 41, so as to achieve sealing of the gaps on both sides of the sealing cover 20.

[0030] In this embodiment, the outer circumferential surface of the outer ring 13 is provided with two spaced outer sealing lips 131, and the inner circumferential surface of the inner ring 11 is provided with two spaced inner sealing lips 111. However, it is not limited to this embodiment, and it can also be configured that the outer circumferential surface of the outer ring 13 is provided with more than two spaced outer sealing lips 131, and the inner circumferential surface of the inner ring 11 is provided with more than two spaced inner sealing lips 111. Multiple outer sealing lips 131 and inner sealing lips 111 form a multi-stage seal, and the sealing effect is better.

[0031] In this embodiment, the outer sides of the two outer sealing lips 131 are mutually opened in a V shape, and the inner sides of the two inner sealing lips 111 are mutually opened in a V shape. The V-shaped structure enables the sealing ring 10 to maintain a sealing effect when resisting weak axial disturbances. However, it is not limited to this embodiment. In other embodiments with more than two outer sealing lips 131 and more than two inner sealing lips 111, at least two pairs of outer sealing lips 131 can be selected to form a V shape, and at least two pairs of inner sealing lips 111 can be selected to form a V shape.

[0032] The root of the outer sealing lip 131 closest to the opening 141 of the annular groove 14 is connected to the edge of the opening 141 of the annular groove 14, and the root of the inner sealing lip 111 closest to the opening 141 of the annular groove 14 is connected to the edge of the opening 141 of the annular groove 14. The outer sealing lip 131, the inner sealing lip 111 and the inner wall of the annular groove 14 at the outermost position form a trumpet-shaped transition surface, which is conducive to the installation of the sealing ring 10 from the opening 141 of the annular groove 14.

[0033] In this embodiment, the connecting portion 12 seals one end of the annular groove 14. The sealing ring 10 forms a structure similar to a lid. When the dust ring is put on the rolling seal cover 20, the dust ring is pressed into place with force. At this time, the inner wall of the outer ring 13, the outer wall of the inner ring 11, and the connecting portion 12 are simultaneously against the end of the sealing cover 20. Since the connecting portion 12 seals one end of the annular groove 14, a negative pressure environment is formed in the annular groove 14, which can resist a certain disturbance force, so that the dust ring is always maintained in the preset position, forming an effective seal, and reducing the risk of leakage caused by the movement of the dust ring. However, it is not limited to this embodiment. In other embodiments, considering the processing technology or other factors, the structure of the connecting portion 12 includes but is not limited to being segmented, or hollow, or having holes.

[0034] The double-lip rotating end face dust ring also includes an outer hoop 52 and an inner hoop 41. The outer hoop 52 is sleeved on the outer circumference of the outer ring 13, and the inner hoop 41 is sleeved on the inner circumference of the inner ring 11. The outer hoop 52 and the inner hoop 41 are used to clamp the sealing ring 10 on the sealing cover 20 to maintain its sealing posture and ensure the sealing effect. The outer hoop 52 is located between the outer sealing lip 131 and the connecting portion 12, and the inner hoop 41 is located between the inner sealing lip 111 and the connecting portion 12, so that it is convenient to install the inner hoop 41 and the outer hoop 52 after the sealing ring 10 is installed. In this embodiment, the material of the sealing ring 10 is rubber, the outer hoop 52 and the inner hoop 41 are steel hoops, the flexibility of the sealing ring 10 is used for sealing, and the rigidity of the steel hoop is used to position the sealing ring 10 on the sealing cover 20 to prevent it from loosening.

[0035] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A double-lip rotating end face dust seal, characterized in that: The invention comprises: a sealing ring, wherein the sealing ring comprises an outer ring, an inner ring, and a connecting portion, wherein the connecting portion connects the outer ring and the inner ring on one side, a gap is provided between the outer ring and the inner ring, the outer ring, the inner ring, and the connecting portion form an annular groove with an opening at one end, the outer circumferential surface of the outer ring is provided with at least one outer sealing lip, and the inner circumferential surface of the inner ring is provided with at least one inner sealing lip; The outer circumferential surface of the outer ring is provided with at least two outer sealing lips arranged at intervals, and among each layer of the outer sealing lips, the outer sides of at least two of the outer sealing lips are opened to each other in a V shape, and the inner circumferential surface of the inner ring is provided with at least two inner sealing lips arranged at intervals, and among each layer of the inner sealing lips, the inner sides of at least two of the inner sealing lips are opened to each other in a V shape.

2. A double-lip rotary end face dust seal according to claim 1, characterized in that: The root of the outer sealing lip closest to the opening of the annular groove is connected to the edge of the opening of the annular groove.

3. The double-lip rotary end face dust seal according to claim 1, characterized in that: The root of the inner sealing lip closest to the opening of the annular groove is connected to the edge of the opening of the annular groove.

4. A double-lip rotary end face dust seal according to any one of claims 1 to 3, characterized in that: The connecting portion seals one end of the annular groove.

5. A double-lip rotary end face dust seal according to claim 4, characterized in that: It also includes an outer hoop, which is sleeved on the outer circumference of the outer ring; or / and, it also includes an inner hoop, which is sleeved on the inner circumference of the inner ring.

6. A double-lip rotary end face dust seal according to claim 5, characterized in that: The outer hoop is located between the outer sealing lip and the connecting portion; or / and, the inner hoop is located between the inner sealing lip and the connecting portion.

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