Axial module combined multi-lip sealing device of oil film bearing

Abstract

The utility model discloses an oil film bearing axial module combination multi-lip sealing device which comprises a sealing cover, a water seal, an aluminum ring and an annular rubber sealing device, the sealing cover is installed on a bearing seat, the water seal is installed on the sealing cover, and a rubber lip of the water seal is matched with the end face of a roller in a sealing mode. The annular rubber sealing device is arranged on the roller neck conical surface of the roller in a sleeved mode, the left side and the right side of the annular rubber sealing device are axially positioned through the aluminum ring and a conical sleeve of the oil film bearing respectively, and the annular rubber sealing device can be in sealing fit with the roller neck conical surface and the inner hole face of the sealing cover respectively. The annular rubber sealing device is composed of an annular rubber sealing module A, an annular rubber sealing module B and an annular rubber sealing module C which are sequentially arranged from left to right, and the annular rubber sealing module A, the annular rubber sealing module B and the annular rubber sealing module C are in axial positioning connection. When the annular rubber sealing device is installed and used, the posture of the annular rubber sealing device is relatively stable, and the sealing effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil film bearing sealing device, concretely relates to an oil film bearing axial module combination multi-lip sealing device. BACKGROUND

[0002] Bearing is an important part in contemporary mechanical equipment, its main function is to support the mechanical rotating body, reduce the friction coefficient in its movement process, and ensure its rotation precision. Like the function of conventional bearings, the oil film bearings used at both ends of the support roller of the rolling mill of the hot rolling line of the steel rolling mill can provide strong supporting force for the support roller and ensure that the roller can rotate efficiently and stably in the bearing seat. The normal work of the oil film bearing cannot be separated from a good lubrication environment. In addition to a reliable lubrication system, a good sealing device is also needed. The role of the sealing device is to prevent the lubricating oil in the bearing seat from leaking and to prevent external cooling water and iron oxide scale and other impurities from entering the bearing seat. Because the working environment of the rolling mill is very harsh, in addition to bearing heavy load and impact, a large amount of cooling water and iron oxide scale and other impurities also seriously threaten the safe operation of the oil film bearing. Therefore, the sealing device of the rolling mill oil film bearing plays a very important role in protecting the normal work of the oil film bearing.

[0003] The sealing device of the rolling mill oil film bearing in the prior art is arranged between the roller neck of the roller and the bearing seat and mainly consists of a sealing cover 1', a water seal 2', an aluminum ring 3', and a multi-limb sealing ring 4'. The sealing cover 1' is installed on the bearing seat 5', the water seal 2' is fixed relative to the bearing seat 5' and is installed on the sealing cover 1', the rubber lip of the water seal 2' is in contact with the end face of the roller 6' and moves relative to the end face, forming a dynamic sealing water prevention line. The multi-limb sealing ring 4' is sleeved on the conical surface of the roller neck of the roller 6' and rotates in the bushing 8' of the oil film bearing together with the roller under the axial positioning of the conical sleeve 7' of the oil film bearing and the aluminum ring 3'. At this time, the oil sealing lip 42' at the end of the oil sealing limb 41' of the multi-limb sealing ring 4' is in contact with the inner hole surface of the sealing cover 1', forming a dynamic sealing oil prevention line, and the water sealing lip 44' at the end of the water sealing limb 43' is in contact with the inner hole surface of the sealing cover 1', forming a dynamic sealing water prevention line. In addition, there is a partition plate 11' in the middle of the inner hole of the sealing cover 1', which separates the oil sealing limb 41' and the water sealing limb 43' on both sides of the partition plate.

[0004] The above-mentioned sealing device of the rolling mill oil film bearing has had a history of application for decades. With the continuous improvement of the technology of the rolling mill oil film bearing, the technical requirements for the sealing device are also getting higher and higher. The traditional multi-limb sealing structure has exposed many problems in actual application.

[0005] First, the multi-limb sealing ring is a rubber sealing ring with a complex cross-section shape, and after being extruded by the aluminum ring, the cone sleeve, the steel belt and the roll neck, the posture of the multi-limb sealing ring has great uncertainty, and the static sealing and dynamic sealing are easily failed, thereby affecting the sealing performance.

[0006] Second, the oil sealing lip and the water sealing lip of the multi-limb sealing ring only form one dynamic sealing oil prevention line and one dynamic sealing water prevention line in contact with the inner hole surface of the sealing cover, and the oil leakage and water ingress often occur in the complex working environment of the rolling mill.

[0007] Third, since there is a partition plate in the inner hole of the sealing cover, the oil sealing limb and the water sealing limb of the multi-limb sealing ring are separated on both sides of the partition plate, and the purpose is to divide the space into an oil sealing area and a water sealing area, and in fact, when the oil leaks or the water enters, the partition plate does not effectively block, and the installation of the multi-limb sealing ring is inconvenient, and the axial movement range of the sealing ring is limited. Technical problems solved by the utility model

[0008] The utility model solves the technical problems of providing an oil film bearing axial module combined multi-lip sealing device, which has a relatively stable posture during installation and use, and can obtain better sealing effect.

[0009] In order to solve the above technical problems, the utility model discloses an oil film bearing axial module combined multi-lip sealing device, which comprises a sealing cover, a water seal, an aluminum ring and an annular rubber sealing device, the sealing cover is installed on the bearing seat, the water seal is installed on the sealing cover, the rubber lip of the water seal is sealingly connected with the end surface of the roll, the annular rubber sealing device is sleeved on the roll neck taper surface of the roll, and the left and right sides are axially positioned by the aluminum ring and the taper sleeve of the oil film bearing, the annular rubber sealing device can be sealingly connected with the roll neck taper surface and the inner hole surface of the sealing cover, characterized in that: the inner hole surface of the sealing cover is an annular cylindrical surface, the annular rubber sealing device is composed of an annular rubber sealing module A, an annular rubber sealing module B and an annular rubber sealing module C arranged in sequence from left to right, and the annular rubber sealing module A, the annular rubber sealing module B and the annular rubber sealing module C are axially positioned and connected.

[0010] As an improvement to this utility model, the right side of the annular rubber sealing module A is vulcanized with an annular metal skeleton A, and metal positioning pins A are evenly distributed and fixed on the annular metal skeleton A. Correspondingly, the left side of the annular rubber sealing module B is evenly distributed and fixed with a metal sleeve B, and the right side is vulcanized with an annular metal skeleton B, and metal positioning pins B are evenly distributed and fixed on the annular metal skeleton B. Metal positioning pins C are evenly distributed and screwed onto the left annular surface of the conical sleeve. The right part of the metal positioning pin C is a stud screwed into the left annular surface of the conical sleeve, and the left part is an approximately frustum-shaped positioning section with positioning holes inside. The right side of the annular rubber sealing module C is vulcanized with an annular metal skeleton C, and positioning holes that match the shape of the left positioning section of the metal positioning pin C are evenly distributed and opened on the annular rubber sealing module C. Each positioning hole passes through the metal skeleton C. When the annular rubber sealing modules A, B, and C are arranged sequentially from left to right, the positioning segments of the left side of the metal positioning pins C, which are evenly spaced on the left annular surface of the cone sleeve, can be inserted into the positioning holes on the corresponding annular rubber sealing module C. The metal positioning pins B, which are evenly spaced on the right side of the annular rubber sealing module B, can be inserted into the positioning holes on the left side of the corresponding metal positioning pins C. The metal positioning pins A, which are evenly spaced on the right side of the annular rubber sealing module A, can be inserted into the metal sleeve B on the left side of the corresponding annular rubber sealing module B.

[0011] As an improvement of this utility model, the inner diameter of the annular rubber sealing module A is provided with annular sealing lips A1 and A2 on the left and right sides respectively, and an annular water sealing lip A inclined to the left and outward is provided on the left side of the outer diameter; the inner diameter of the annular rubber sealing module B has an annular sealing line B with a semi-circular cross section, and the outer diameter has an annular oil sealing lip B inclined to the right and outward; the inner diameter of the annular rubber sealing module C is provided with annular sealing lips C1 and C2 on the left and right sides respectively, and an annular oil sealing lip C inclined to the right and outward and an annular oil-slinging lip C inclined to the right and outward are provided on the left and right sides respectively.

[0012] This utility model has the following beneficial technical effects: First, the inner surface of the sealing cover is an annular cylindrical surface, eliminating the need for a partition structure. This allows the annular rubber sealing device to better adapt to the axial movement of the roll. The annular rubber sealing device consists of annular rubber sealing module A, annular rubber sealing module B, and annular rubber sealing module C arranged sequentially from left to right. The structure of each rubber sealing module is significantly simplified compared to the multi-limb sealing ring structure in the prior art, making installation more convenient. Furthermore, the annular rubber sealing modules A, B, and C are axially positioned and connected without requiring... The steel band tightening significantly reduces the deformation of the rubber sealing module and better maintains its inherent posture, thus achieving a better sealing effect. Secondly, the annular rubber sealing device composed of annular rubber sealing modules A, B, and C in this invention can form multiple water and oil sealing lines with the inner surface of the sealing cover, resulting in a better sealing effect. Thirdly, the axial positioning connection between annular rubber sealing modules A, B, and C in this invention is mainly achieved through the axial connection between the positioning pin and the hole, resulting in a simple structure and convenient installation. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Figure 1 This is a structural diagram of a rolling mill oil film bearing sealing device in the existing technology.

[0015] Figure 2 This is an installation diagram of the multi-lip sealing device for the axial module combination of the oil film bearing according to the first embodiment of this utility model. In the diagram, an annular oil sealing lip B is formed on one side of the outer diameter of the annular rubber sealing module B.

[0016] Figure 3 This is a cross-sectional view of the annular rubber sealing module A in this utility model.

[0017] Figure 4 This is a cross-sectional view of the annular rubber sealing module B according to the first embodiment of this utility model. In the figure, an annular oil sealing lip B is formed on one side of the outer diameter of the annular rubber sealing module B.

[0018] Figure 5 This is a cross-sectional view of the annular rubber sealing module C in this utility model.

[0019] Figure 6 This is a cross-sectional view of the metal locating pin C in this utility model.

[0020] Figure 7This is a cross-sectional view of the annular rubber sealing module B according to the second embodiment of the present invention. In the figure, an annular sealing lip B is formed on one side of the outer diameter of the annular rubber sealing module B.

[0021] Figure 8 This is an installation diagram of the multi-lip sealing device for the axial module combination of the oil film bearing according to the second embodiment of this utility model. In the diagram, an annular sealing lip B is formed on one side of the outer diameter of the annular rubber sealing module B.

[0022] Figure 9 This is a cross-sectional view of the sealing cap in this utility model.

[0023] Figure 10 This is a cross-sectional view of the sealing cap in this utility model. The inner surface of the sealing cap is coated with a ceramic layer. Detailed Implementation

[0024] See Figure 1 , Figure 1 This is a structural diagram of a rolling mill oil film bearing sealing device in the prior art. In the diagram, 1' is the sealing cover, 2' is the water seal, 3' is the aluminum ring, 4' is the multi-limb rubber sealing ring, 5' is the bearing housing, 6' is the roll, 7' is the tapered sleeve of the oil film bearing, 8' is the bushing of the oil film bearing, 41' is the oil sealing limb, 42' is the oil sealing lip, 43' is the water sealing limb, 44' is the water sealing lip, and 11' is the partition plate.

[0025] See also Figure 2 - Figure 10This utility model discloses an axial module combination multi-lip sealing device for an oil film bearing, comprising a sealing cover 1, a water seal 2, an aluminum ring 3, and an annular rubber sealing device. The sealing cover is installed on the bearing seat 4, and the water seal is installed on the sealing cover. The rubber lip of the water seal is sealed to the end face of the roll 5. The annular rubber sealing device is sleeved on the conical surface of the roll neck, and is axially positioned on the left and right sides by the aluminum ring and the conical sleeve 6 of the oil film bearing, respectively. The annular rubber sealing device can form a sealing fit with the conical surface of the roll neck and the inner hole surface 101 of the sealing cover, respectively. The feature is that the inner hole surface 101 of the sealing cover is an annular cylindrical surface. The annular rubber sealing device is composed of annular rubber sealing modules A7, B8, and C9 arranged sequentially from left to right. The annular rubber sealing modules A, B, and C are axially positioned and connected. The annular rubber sealing module A7 has an annular metal skeleton A71 vulcanized on its right side, and metal positioning pins A72 are evenly distributed and fixed on the annular metal skeleton A72. Correspondingly, the annular rubber sealing module B8 has a metal sleeve B81 evenly distributed and fixed on its left side, and an annular metal skeleton B82 vulcanized on its right side, with metal positioning pins B83 evenly distributed and fixed on the annular metal skeleton B82. The left annular surface of the conical sleeve 6 is evenly screwed with metal positioning pins C61. The right part of the metal positioning pin C is a stud 62 screwed into the left annular surface of the conical sleeve, and the left part is an approximately frustum-shaped positioning section 63 with positioning holes 64 inside. The right side of the annular rubber sealing module C9 has an annular metal skeleton C91 vulcanized, and the annular rubber sealing module C9 has evenly distributed positioning holes 92 that match the shape of the left positioning section 63 of the metal positioning pin C92. Each positioning hole passes through the metal skeleton C91. When the annular rubber sealing modules A7, B8, and C9 are arranged sequentially from left to right, the positioning segments 63 of the left side of the metal positioning pins C, which are evenly spaced on the left annular surface of the cone sleeve 6, can be inserted into the positioning holes 92 on the corresponding annular rubber sealing module C. The metal positioning pins B83, which are evenly spaced and fixed on the right side of the annular rubber sealing module B8, can be inserted into the positioning holes 64 on the left side of the positioning segments 63 of the corresponding metal positioning pins C. The metal positioning pins A72, which are evenly spaced and fixed on the right side of the annular rubber sealing module A7, can be inserted into the metal sleeves B81 on the left side of the corresponding annular rubber sealing module B8.The annular rubber sealing module A7 has annular sealing lips A-73 and A-74 formed on the left and right sides of its inner diameter, respectively, and an annular water-sealing lip A75 inclined to the left and outward on the left side of its outer diameter. The annular rubber sealing module B8 has an annular sealing line B84 with a semi-circular cross-section on its inner diameter, and an annular oil-sealing lip B85 inclined to the right and outward or an annular water-sealing lip B85' inclined to the left and outward on its outer diameter. The annular rubber sealing module C9 has annular sealing lips C-93 and C-94 formed on the left and right sides of its inner diameter, and annular oil-sealing lip C95 and annular oil-sparking lip C96 inclined to the right and outward on the left and right sides of its outer diameter, respectively. The inner hole surface 101 of the sealing cover 1 is coated with a ceramic layer 102. Coating the inner hole surface with a ceramic layer can reduce the friction between the annular rubber sealing device and the inner hole surface, improve the sealing effect, and extend the service life of the sealing lips on the annular rubber sealing device. A ceramic ring 51 is fixed on the end face of the roller 5 that is sealed with the water seal 2. By adopting the above-mentioned technical features, the friction between the water seal lip and the end face of the roller can also be reduced.

[0026] It is understood that the above specific description of the present utility model is only used to illustrate the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Any modifications or equivalent substitutions to the present utility model to achieve the same technical effect are within the protection scope of the present utility model.

Claims

1. A multi-lip sealing device for an axial module assembly of an oil film bearing, comprising a sealing cover (1), a water seal (2), an aluminum ring (3), and an annular rubber sealing device, wherein the sealing cover is installed on a bearing seat (4), the water seal is installed on the sealing cover, the rubber lip of the water seal is sealed to the end face of a roll (5), the annular rubber sealing device is sleeved on the conical surface of the roll neck, and is axially positioned on the left and right sides by the aluminum ring and the conical sleeve (6) of the oil film bearing, respectively, and the annular rubber sealing device can form a sealing fit with the conical surface of the roll neck and the inner hole surface (101) of the sealing cover, characterized in that: The inner hole surface (101) of the sealing cover is an annular cylindrical surface. The annular rubber sealing device is composed of annular rubber sealing module A (7), annular rubber sealing module B (8) and annular rubber sealing module C (9) arranged from left to right. The annular rubber sealing module A, annular rubber sealing module B and annular rubber sealing module C are axially positioned and connected.

2. The multi-lip sealing device for an axial module assembly of an oil film bearing as described in claim 1, characterized in that: The annular rubber sealing module A (7) has an annular metal skeleton A (71) vulcanized on its right side, and metal positioning pins A (72) are evenly distributed and fixed on the annular metal skeleton A. The annular rubber sealing module B (8) has a metal sleeve B (81) evenly distributed and fixed on its left side, and an annular metal skeleton B (82) vulcanized on its right side, and metal positioning pins B (83) are evenly distributed and fixed on the annular metal skeleton B. Metal positioning pins C (61) are evenly distributed and screwed onto the left annular surface of the conical sleeve (6). The right part of the metal positioning pin C is a stud (62) screwed into the left annular surface of the conical sleeve, and the left part is a positioning section (63) that is approximately frustum-shaped. The positioning section has a positioning hole (64). The annular rubber sealing module C (9) has an annular metal skeleton C (91) vulcanized on its right side, and positioning holes (92) that match the shape of the positioning section (63) on the left side of the metal positioning pin C are evenly distributed and fixed on the annular rubber sealing module C. Each positioning hole passes through the metal skeleton C. When the annular rubber sealing module A (7), annular rubber sealing module B (8) and annular rubber sealing module C (9) are arranged in order from left to right, the positioning section (63) of the left part of the metal positioning pin C, which is evenly distributed on the left annular surface of the cone sleeve (6), can be inserted into the positioning hole (92) on the corresponding annular rubber sealing module C. The metal positioning pin B (83) fixed at even intervals on the right side of the annular rubber sealing module B (8) can be inserted into the positioning hole (64) of the positioning section (63) on the left side of the corresponding metal positioning pin C. The metal positioning pin A (72) fixed at even intervals on the right side of the annular rubber sealing module A (7) can be inserted into the metal sleeve B (81) on the left side of the corresponding annular rubber sealing module B (8).

3. The multi-lip sealing device for an axial module assembly of an oil film bearing as described in claim 1 or 2, characterized in that: The inner diameter of the annular rubber sealing module A (7) has annular sealing lips A-1 (73) and sealing lips A-2 (74) formed on the left and right sides respectively, and annular water sealing lip A (75) inclined to the left and outward on the left side of the outer diameter; the inner diameter of the annular rubber sealing module B (8) has annular sealing line B (84) with a semi-circular cross section, and annular oil sealing lip B (85) inclined to the right and outward on the outer diameter; the inner diameter of the annular rubber sealing module C (9) has annular sealing lips C-1 (93) and sealing lips C-2 (94) formed on the left and right sides respectively, and annular oil sealing lip C (95) and annular oil-slinging lip C (96) inclined to the right and outward on the left and right sides respectively.

4. The multi-lip sealing device for an axial module assembly of an oil film bearing as described in claim 1 or 2, characterized in that: The inner diameter of the annular rubber sealing module A (7) has annular sealing lips A-1 (73) and sealing lips A-2 (74) formed on the left and right sides respectively, and annular water sealing lips A (75) inclined to the left and outward formed on the left side of the outer diameter; the inner diameter of the annular rubber sealing module B (8) has annular sealing line B (84) with a semi-circular cross section, and annular water sealing lips B (85') inclined to the left and outward formed on the outer diameter; the inner diameter of the annular rubber sealing module C (9) has annular sealing lips C-1 (93) and sealing lips C-2 (94) formed on the left and right sides respectively, and annular oil sealing lips C (95) and annular oil slinging lips C (96) inclined to the right and outward formed on the left and right sides respectively.

5. The multi-lip sealing device for an axial module assembly of an oil film bearing as described in claim 1, characterized in that: The inner surface (101) of the sealing cap (1) is coated with a ceramic layer (102).

6. The multi-lip sealing device for an axial module assembly of an oil film bearing as described in claim 1, characterized in that: A ceramic ring (51) is fixed on the end face of the roller (5) that is sealed to the water seal (2).

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