An oil film bearing seal arrangement

Abstract

The application discloses a kind of oil film bearing sealing devices, be arranged between roll end and bearing pedestal, including neck seal, sealing part and sealing cover, sealing cover is fixed with flange water seal, neck seal has connecting part, water seal part and support part, the sealing part has mounting ring, the outer circumference of mounting ring has annular oil seal and water seal limb, tight hoop steel band is installed on the mounting ring between oil seal and water seal limb, characterized in that: the end of mounting ring located in the side of oil seal is connected with annular oil throwing lip, annular boss is formed on the inner circumferential surface of mounting ring located in the side of oil seal, correspondingly, the outer circumferential surface of support part is opened with annular clamping groove, when sealing part is set on the support part of neck seal, the annular boss can be located in the annular clamping groove exactly.The application is convenient to disassemble and assemble, not easy to scratch, stable in the process of use, not easy to deform and has good sealing effect.

Description

Technical Field

[0001] This invention relates to the technical field of bearing sealing devices, and more specifically to an oil film bearing sealing device. Background Technology

[0002] The working environment of hot rolling mills in steel enterprises is extremely harsh, with a large amount of cooling water and iron oxide scale washing over the rolls. In order to ensure that the oil film bearings in the support roll bearing housing can operate normally, an oil film bearing sealing device is installed in the area enclosed by the roll end face, roll neck and bearing housing to prevent external cooling water and iron oxide scale from entering the oil film bearing, and at the same time prevent the lubricating oil in the oil film bearing from leaking.

[0003] There are currently various types of oil film bearing sealing devices, and an invention patent entitled "Oil Film Bearing Sealing Device" has been disclosed in the prior art, with the authorization announcement number "CN 101338818B". Its structural principle is as follows: The main sealing element consists of a neck seal A and a sealing part B. The sealing part B is sleeved in the groove of the neck seal A. The neck seal A and the sealing part B are clamped to the roll neck by the steel strip of part B. It also includes a clamping steel strip, which is sleeved in the groove between the dynamic sealing lip and the static sealing lip of the neck seal A. During mill operation, neck seal A and sealing part B rotate together with the roll and tapered sleeve within the bushing. The sealing cover is fixed on the bearing housing. The oil sealing lip of sealing part B contacts the inner bore surface of the sealing cover, forming a dynamic oil sealing barrier. The water sealing lip of sealing part B contacts the inner bore surface of the sealing cover, forming a dynamic water sealing barrier. The dynamic water sealing lip of neck seal A contacts the side of the sealing cover, forming a dynamic water sealing barrier. The static water sealing lip of neck seal A contacts the end face of the roll, forming a static water sealing barrier. Additionally, the flange water seal and protective water seal fixed on the sealing cover each contact the roll, forming a dynamic water sealing barrier. This sealing structure has significant advantages such as good sealing effect, high installation tolerance, and adaptability to axial movement of the roll. However, it currently has the following shortcomings that require further optimization and improvement: First, when assembling the sealing part B and the neck seal A, the sealing part B needs to be fitted onto the neck seal A first, and then the steel strip of part B needs to be fitted. When fitting the steel strip of part B, it is necessary to pass over the oil-sparking lip of the neck seal A and the sealing lip of the sealing part B in sequence. Since the outer diameters of both are much larger than the inner diameter of the steel strip of part B, this operation is very difficult and easily scratches the sealing lip of the sealing part B. It also easily leads to uneven clamping force of the steel strip of part B on the sealing part B, causing local deformation and ultimately affecting the sealing performance. Second, when the assembly of the sealing part B and the neck seal A is installed between the tapered sleeve and the roll, axial positioning is achieved by the tapered sleeve and the end face of the roll. Because the neck seal A is a rubber component, and the contact area with the roll neck is relatively thin and lacks rigidity, it is prone to bending plastic deformation during installation and use. This causes increased pressure between the dynamic sealing lip and the sealing cap, resulting in wear, temperature rise, and aging. Simultaneously, it causes the static sealing lip to separate from the end face of the roll, leading to static seal failure. Third, the tight steel band fitted on the neck seal A has the function of controlling the outward expansion of the installation part, but it cannot prevent the installation part from shrinking inward, so its effect on the posture stability of the installation part is limited. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings and propose an oil film bearing sealing device that is easy to assemble and disassemble, not easy to be scratched, has a stable posture during use, is not easy to be deformed, and has a good sealing effect.

[0005] To solve the above-mentioned technical problems, the present invention provides an oil film bearing sealing device, disposed between the end of a roll and a bearing housing, comprising a neck seal, a sealing portion sleeved on the neck seal, and a sealing cover fixed on the bearing housing. A flange water seal, capable of sealingly engaging with the end face of the roll, is fixed on the sealing cover. The neck seal has an annular connecting portion, with a water-sealing portion formed at its outer edge and a support portion forming at its inner edge. The water-sealing portion has a static sealing lip on the side away from the sealing cover, and an oil-sealing lip on the inner diameter side of the support portion. The main lip; the sealing part has a mounting ring, the outer circumference of which has an annular oil sealing member and a water sealing member, and a tight-fitting steel band is fitted onto the mounting ring between the oil sealing member and the water sealing member. The characteristic is that: the end of the mounting ring located on the oil sealing member side is connected to an annular oil-pouring lip, and an annular boss is formed on the inner circumferential surface of the mounting ring located on the oil sealing member side. Correspondingly, an annular groove is opened on the outer circumferential surface of the support part. When the sealing part is fitted onto the support part of the neck seal, the annular boss can be located in the annular groove.

[0006] As an improvement of the present invention, an outer labyrinth ring is formed on the side of the water-sealing part near the sealing cover, and an inner labyrinth ring is correspondingly provided on the sealing cover.

[0007] As a further improvement of the present invention, the connecting part and the water-sealing part of the neck seal are vulcanized with an annular steel skeleton in a conformal manner, and the outer end of the steel skeleton extends to the top of the outer side of the outer labyrinth ring.

[0008] As a further improvement of the present invention, an annular double support ring is formed at the connection between the connecting part and the sealing part, on the same side as the static sealing lip.

[0009] Furthermore, it also includes a ceramic ring fixed on the end face of the roll that can contact the flange water seal to form a dynamic seal.

[0010] Furthermore, the support portion contains a vulcanized skeleton spring.

[0011] This invention has the following beneficial technical effects: 1. Since the oil-pouring lip is located on the sealing part, during assembly, the clamping steel band can be first fitted onto the mounting ring between the oil-sealing member and the water-sealing member, and then the sealing part can be pushed in along one end of the support part of the neck seal. Because the sealing part is a rubber component, it is easier to fit the clamping steel band onto a single sealing part than onto a combined structure of the neck seal and the sealing part, and neither the oil-pouring lip nor the oil-sealing lip is easily scratched; 2. The inner and outer labyrinth rings can form a non-contact mechanical labyrinth seal, which will not produce wear, can adapt to the axial movement of the roll during operation, and at the same time helps to ensure the stability of the neck seal; 3. Since the connecting part and the water-sealing part are vulcanized with a steel skeleton, and the outer end of the steel skeleton extends to the top of the outer labyrinth ring, thus... When the roll is removed from the bearing housing, the flange water seal on the sealing cover allows the neck seal and roll to detach effectively and remain inside the bearing housing, making disassembly very convenient. Simultaneously, the steel frame ensures that the connection and sealing parts do not undergo permanent deformation during installation and use, improving sealing performance and service life. It also enhances the overall manufacturing precision of the neck seal and prevents rubber shrinkage from affecting dimensions. Fourth, the double support rings on the connection improve the stability of the connection during installation and use, and enhance the overall sealing performance of the product. Fifth, the skeleton spring allows the support to maintain both rigidity and deformation capacity, ensuring a good sealing posture and performance during installation and use. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] Figure 1 This is a partial structural diagram of the installation and use state of an oil film bearing sealing device according to the present invention.

[0014] Figure 2 This is a schematic diagram of the assembly structure of the neck seal and the sealing part in this invention.

[0015] Figure 3 yes Figure 2 A schematic diagram of the structure of the neck seal.

[0016] Figure 4 yes Figure 2 A schematic diagram of the middle sealing part.

[0017] Figure 5 This is a schematic diagram of the sealing cap structure in this invention. Detailed Implementation

[0018] See Figure 1 - Figure 5 This invention discloses an oil film bearing sealing device, disposed between the end of a roll 1 and a bearing housing 2. It includes a neck seal 3, a sealing portion 4 fitted onto the neck seal, and a sealing cover 5 fixed to the bearing housing. The sealing cover is respectively fixed with a protective water seal 6 and a flange water seal 7, which can respectively seal against the outer annular surface 11 and the end face 12 of the roll end. The neck seal 3 has an annular connecting portion 31, with a water-sealing portion 32 formed at its outer edge and a support portion 33 forming at its inner edge. The water-sealing portion has a static sealing lip 321 on the side away from the sealing cover, and an oil-sealing main lip 34 on the inner diameter side of the support portion. The sealing portion 4 has… The device includes an installation ring 41, the outer circumference of which has an annular oil-sealing member 42 and a water-sealing member 43. The oil-sealing member has an oil-sealing lip 421 at its end, and the water-sealing member has a water-sealing lip 431 at its end. A steel band 44 is fitted onto the installation ring between the oil-sealing member and the water-sealing member. The device is characterized by an annular oil-slinging lip 45 connected to the end of the installation ring 41 located on the oil-sealing member side. An annular boss 46 is formed on the inner circumferential surface of the installation ring on the oil-sealing member side. Correspondingly, an annular groove 35 is formed on the outer circumferential surface of the support portion 33. When the sealing portion is fitted onto the support portion of the neck seal, the annular boss 46 is positioned within the annular groove 35. An outer labyrinth ring 322 is formed on the side of the water-sealing portion 32 near the sealing cap, and an inner labyrinth ring 51 is correspondingly provided on the sealing cap. An annular steel skeleton 36 is vulcanized within the connecting portion 31 and the water-sealing portion 32 of the neck seal, with the outer end of the steel skeleton extending to the top outer side of the outer labyrinth ring 322. An annular double support ring 37, on the same side as the static sealing lip 321, is also formed at the connection between the connecting portion 31 and the water-sealing portion 32. A ceramic ring 8, fixed to the end face 12 of the roll, is also included, capable of contacting the flange water seal 7 to form a dynamic seal. A skeleton spring 331 is vulcanized within the support portion 33.

[0019] In this invention, both the neck seal and the sealing portion fitted onto the neck seal are rubber elastic seals. During installation, the tightening steel band is first fitted onto the mounting ring between the oil sealing member and the water sealing member. Then, the sealing portion is pushed in along one end of the support portion of the neck seal until the protrusion on the sealing portion falls precisely into the groove of the support portion. This assembly method avoids the difficulties and uneven stress associated with first fitting the sealing portion onto the support portion and then installing the tightening steel band. Disassembly is also relatively easy, significantly reducing installation difficulty and the labor intensity for workers. The assembled neck seal and sealing part are installed between the bearing housing and the end of the roll. When the mill is working, the neck seal rotates together with the roll 1 and the tapered sleeve 9 in the bushing 10. The main oil sealing lip and the static water sealing lip of the neck seal are in contact with the roll to form two static sealing defense lines. The water sealing lip and the oil sealing lip of the sealing part are in contact with the inner hole surface of the sealing cover to form two dynamic sealing defense lines. Under the action of multiple sealing defense lines, it can effectively prevent external cooling water from entering the oil film bearing and prevent internal lubricating oil leakage.

[0020] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Any modifications or equivalent substitutions to the present invention to achieve the same technical effect are within the protection scope of the present invention.

Claims

1. An oil film bearing sealing device, disposed between the end of a roll (1) and a bearing housing (2), comprising a neck seal (3), a sealing portion (4) fitted on the neck seal, and a sealing cover (5) fixed on the bearing housing, wherein a flange water seal (7) is fixed on the sealing cover and can seal with the end face (12) of the roll, wherein the neck seal (3) has an annular connecting portion (31), wherein a water sealing portion (32) is formed at the outer edge of the connecting portion and a support portion (33) is formed at the inner edge of the connecting portion, wherein a static sealing lip (321) is formed on the side of the water sealing portion away from the sealing cover, and an oil sealing lip (34) is formed on the inner diameter side of the support portion; wherein the sealing portion (4) has an mounting ring (41), wherein an annular oil sealing member (42) and a water sealing member (43) are formed on the outer circumference of the mounting ring, and a clamping steel band (44) is fitted on the mounting ring between the oil sealing member and the water sealing member, characterized in that: An annular oil-slinging lip (45) is connected to the end of the mounting ring (41) located on one side of the sealing member. An annular boss (46) is formed on the inner circumferential surface of the mounting ring located on one side of the sealing member. Correspondingly, an annular groove (35) is opened on the outer circumferential surface of the support part (33). When the sealing part is fitted onto the support part of the neck seal, the annular boss (46) can be located in the annular groove (35).

2. The oil film bearing sealing device as described in claim 1, characterized in that: The water-sealing part (32) has an outer labyrinth ring (322) formed on the side near the sealing cover, and a corresponding inner labyrinth ring (51) is provided on the sealing cover.

3. The oil film bearing sealing device as described in claim 2, characterized in that: The neck seal has an annular steel skeleton (36) vulcanized in the connecting part (31) and the water sealing part (32) in a conformal manner, with the outer end of the steel skeleton extending to the top of the outer side of the outer labyrinth ring (322).

4. The oil film bearing sealing device as described in claim 1, characterized in that: At the connection between the connecting part (31) and the sealing part (32), an annular double support ring (37) is also formed on the same side as the static sealing lip (321).

5. The oil film bearing sealing device as described in claim 1, characterized in that: It also includes a ceramic ring (8) fixed on the end face (12) of the roll and capable of contacting the flange water seal (7) to form a dynamic sealing fit.

6. The oil film bearing sealing device as described in claim 1, characterized in that: The support part (33) is vulcanized with a skeleton spring (331).

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