Rolling mill roll neck radial modular multi-lip oil film bearing sealing device
By introducing an annular rubber sealing module and ceramic layer design into the oil film bearing sealing device of the rolling mill roll neck, multiple dynamic sealing defenses are formed, solving the problems of sealing failure and impurity ingress, and achieving better sealing effect and extended bearing life.
Patent Information
- Application Number
- CN202520370439.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing oil film bearing sealing devices for rolling mill roll necks are prone to failure under high-pressure oil inlet or harsh environments, leading to lubricant leakage and impurity entry, affecting the safe operation of the bearing. Furthermore, the partition design restricts the axial movement of the sealing ring.
The annular rubber sealing module is combined with a multi-limb rubber sealing ring to form multiple dynamic sealing defenses. A ceramic layer is sprayed on the inner surface of the sealing cover. The partition design is eliminated, and the inner hole of the sealing cover is made into an annular cylindrical surface. The annular rubber sealing module and the multi-limb rubber sealing ring are fixed by a clamping steel band.
It improves the sealing effect of oil and water, enhances the adaptability of the sealing structure, reduces the coefficient of friction, extends the life of the sealing lip, ensures that the lubricating oil does not leak, prevents impurities from entering, and improves the reliability of bearing operation.
Smart Images
Figure CN223895016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a rolling mill roll neck oil film bearing sealing device, specifically a rolling mill roll neck radial modular multi-lip oil film bearing sealing device. Background Technology
[0002] Hot-rolled steel strip mills in steel enterprises typically consist of multiple mill stands. Each stand generally comprises two work rolls and two support rolls. Due to the relatively large rolling force, oil film bearings are generally used as radial support bearings in the bearing housings at both ends of the support rolls. When oil film bearings are in operation, they require a certain viscosity of lubricating oil. This lubricating oil has multiple functions, including reducing friction, minimizing frictional heat generation, cleaning impurities from the bearing, removing frictional heat, and preventing bearing corrosion. Therefore, a good lubrication environment is a prerequisite for the normal operation of oil film bearings, improving their efficiency, and extending their service life. Sealing devices are crucial for creating these favorable lubrication conditions.
[0003] The oil film bearing sealing device for the rolling mill neck is arranged between the rolling mill neck and the bearing housing. Its purpose is to prevent the lubricating oil in the oil film bearing cavity from leaking out and to ensure the safe operation of the oil film bearing. On the other hand, it prevents a large amount of external cooling water, rolling oil, iron oxide chips, dust and other impurities from seeping into the lubricating oil in the oil film bearing cavity and affecting the quality of the oil.
[0004] The existing mill roll neck oil film bearing sealing device mainly consists of a sealing cover 1', a water seal 2', an aluminum ring 3', and a multi-limb rubber sealing ring 4'. The sealing cover 1' is installed on the bearing housing 5', and the water seal 2' is installed on the sealing cover 1' and fixed relative to the bearing housing 5'. The rubber lip of the water seal 2' contacts the end face of the roll 6' and moves relative to it, forming a dynamic sealing water barrier. The multi-limb rubber sealing ring 4' is fitted onto the tapered surface of the roll neck of the roll 6'. Axially positioned by the tapered sleeve 7' and aluminum ring 3' of the oil film bearing, it rotates together with the roll within the bushing 8' of the oil film bearing. At this time, the oil-sealing lip 42' at the end of the oil-sealing limb 41' of the multi-limb rubber sealing ring 4' contacts the inner bore surface of the sealing cover 1', forming a dynamic oil-sealing barrier. The water-sealing lip 44' at the end of the water-sealing limb 43' contacts the inner bore surface of the sealing cover 1', forming a dynamic water-sealing barrier. Furthermore, a partition 11' exists in the middle of the inner bore of the sealing cover 1', separating the oil-sealing limb 41' and the water-sealing limb 43' on either side of the partition.
[0005] The aforementioned oil film bearing sealing device for rolling mill necks has been used for decades and generally provides good sealing performance under normal operating conditions. However, the equipment conditions and rolling environments vary from steel plant to steel plant, and this sealing structure also has many problems in actual operation:
[0006] First, when the lubrication system provides a large inlet pressure to the bearing housing, or when the oil return from the bearing housing is not smooth, there is a lot of bearing oil in the oil film inside the bearing housing. The sealing device only has a dynamic seal formed by the oil sealing lip of the multi-limb rubber sealing ring and the sealing cover. The oil sealing failure often occurs, causing lubricating oil to leak out, resulting in increased oil consumption and environmental pollution.
[0007] Secondly, the rolling mill operates in a harsh environment with a high concentration of impurities such as cooling water and iron oxide scale. Over time, severe corrosion will occur on the sealing cover and the end face of the roll. In addition, the axial movement of the roll during operation will cause the cooling water and iron oxide scale to easily break through the flange water seal and reach the dynamic seal formed by the multi-limb rubber sealing ring water lip and the sealing cover. A large amount of cooling water will accumulate here and easily break through the defense line to enter the oil film bearing and mix with the lubricating oil, threatening the safe operation of the oil film bearing.
[0008] Third, because there is a partition in the middle of the inner hole of the sealing cover, the oil sealing part and the water sealing part of the multi-limb rubber sealing ring are separated on both sides of the partition. The purpose is to divide the space into an oil sealing area and a water sealing area. However, in reality, when oil leaks or water enters, the partition not only fails to play an effective blocking role, but also makes it inconvenient to install the multi-limb rubber sealing ring, and also limits the axial movement range of the sealing ring. Utility Model Content
[0009] The technical problem to be solved by this utility model is to provide a radial modular multi-lip oil film bearing sealing device for rolling mill roll necks with multiple sealing lines and good oil and water sealing effects.
[0010] To solve the above-mentioned technical problems, this utility model provides a radial modular multi-lip oil film bearing sealing device for rolling mill roll necks, including a sealing cover, a water seal, an aluminum ring, and a multi-limb rubber sealing ring. The sealing cover is installed on the bearing housing, and the water seal is installed on the sealing cover. The rubber lip of the water seal is in a sealing fit with the end face of the roll. The multi-limb rubber sealing ring is sleeved on the tapered surface of the roll neck, and is axially positioned on both sides by the aluminum ring and the tapered sleeve of the oil film bearing, respectively. The first oil sealing lip at the end of the first oil sealing limb of the multi-limb rubber sealing ring near the tapered sleeve and the first water sealing lip at the end of the first water sealing limb of the multi-limb rubber sealing ring near the aluminum ring are both in a sealing fit with the inner hole surface of the sealing cover. A first annular space is formed between the first oil sealing limb and the first water sealing limb of the multi-limb rubber sealing ring. The groove is characterized in that: an annular rubber sealing module matching its shape and size is provided in the first annular groove, the annular rubber sealing module having a second oil sealing member that is in contact with the first oil sealing member and a second water sealing member that is in contact with the first water sealing member, the end of the second oil sealing member having a second oil sealing lip that can seal and cooperate with the inner hole surface of the sealing cap, the second oil sealing lip and the first oil sealing lip being arranged in opposite directions of inclination; the end of the second water sealing member having a second water sealing lip that can seal and cooperate with the inner hole surface of the sealing cap, the second water sealing lip and the first water sealing lip being arranged in opposite directions of inclination; a second annular groove is formed between the second oil sealing member and the second water sealing member of the annular rubber sealing module.
[0011] As an improvement of this utility model, the second annular groove is equipped with a clamping steel strip that can tighten the annular rubber sealing module and the multi-limb rubber sealing ring at the roll neck.
[0012] As a further improvement of this utility model, the inner surface of the sealing cap is an annular cylindrical surface.
[0013] Furthermore, the inner surface of the sealing cap is coated with a ceramic layer.
[0014] As a further improvement of this utility model, the bottom circumference of the first annular groove of the multi-limb rubber sealing ring is evenly distributed with a plurality of cylindrical positioning protrusions, and correspondingly, the inner diameter circumference of the annular rubber sealing module is evenly distributed with a plurality of positioning grooves. When the annular rubber sealing module is located in the first annular groove of the multi-limb rubber sealing ring, the positioning protrusions are just inserted into the corresponding positioning grooves.
[0015] This utility model has the following beneficial technical effects: 1. The second oil-sealing lip of the annular rubber sealing module and the first oil-sealing lip of the multi-limb rubber sealing ring form two dynamic sealing oil-sealing defense lines by sealing the inner hole surface of the sealing cover; the second water-sealing lip of the annular rubber sealing module and the first water-sealing lip of the multi-limb rubber sealing ring form two dynamic sealing water-sealing defense lines by sealing the inner hole surface of the sealing cover. This utility model forms more sealing defense lines and has better oil-sealing and water-sealing effects; 2. The inner hole surface of the sealing cover is an annular cylindrical surface, eliminating the need for a partition structure, thus... The multi-limb rubber sealing ring and the annular rubber sealing module can better adapt to the axial movement of the roll. The first and second sealing oil lips and the first and second sealing water lips contact and slide relative to the ceramic layer on the inner surface of the sealing cover. The friction coefficient is low, which can effectively improve the sealing effect and extend the service life of the lips. Third, the positioning protrusion of the multi-limb rubber sealing ring is inserted into the positioning groove in the corresponding annular rubber sealing module. Under the clamping action of the clamping steel belt, the annular rubber sealing module and the multi-limb rubber sealing ring can be firmly combined together and rotate with the roll. Attached Figure Description
[0016] The present invention will now be described in further detail with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram of the structure of the oil film bearing sealing device for rolling mill roll necks in the prior art.
[0018] Figure 2 This is an installation diagram of a radial modular multi-lip oil film bearing sealing device for rolling mill roll necks according to this utility model.
[0019] Figure 3 This is a schematic diagram of the structure of the multi-limb rubber sealing ring and the annular sealing module in this utility model.
[0020] Figure 4 This is a cross-sectional view of the multi-limb rubber sealing ring in this utility model.
[0021] Figure 5 This is a cross-sectional view of the annular sealing module in this utility model.
[0022] Figure 6 This is a cross-sectional view of the sealing cap in this utility model.
[0023] Figure 7 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 1This is a schematic diagram of the sealing device for an oil film bearing in a rolling mill roll neck 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 7 This utility model discloses a radial modular multi-lip oil film bearing sealing device for a rolling mill roll neck, comprising a sealing cover 1, a water seal 2, an aluminum ring 3, and a multi-limb rubber sealing ring 4. The sealing cover is mounted on a bearing seat 5, and the water seal is mounted on the sealing cover. The rubber lip of the water seal is in sealing engagement with the end face of the roll 6. The multi-limb rubber sealing ring is sleeved on the tapered surface of the roll neck, and is axially positioned on both sides by the aluminum ring and the tapered sleeve 7 of the oil film bearing, respectively. The first oil lip 42 at the end of the first oil lip 41 on the multi-limb rubber sealing ring near the tapered sleeve and the first water lip 44 at the end of the first water lip 43 on the multi-limb rubber sealing ring near the aluminum ring are both in sealing engagement with the inner hole surface 101 of the sealing cover. A first annular groove 45 is formed between the first oil lip and the first water lip on the multi-limb rubber sealing ring. The feature is that: an annular rubber sealing module 8, matching its shape and size, is provided within the first annular groove 45. This annular rubber sealing module has a second oil sealing member 81 that abuts against the first oil sealing member 41 and a second water sealing member 83 that abuts against the first water sealing member 43. The end of the second oil sealing member has a second oil sealing lip 82 that can seal against the inner bore surface of the sealing cover. The inclination directions of the second oil sealing lip and the first oil sealing lip are opposite to each other. The end of the second water sealing member has a second water sealing lip 84 that can seal against the inner bore surface of the sealing cover. The inclination directions of the second water sealing lip and the first water sealing lip are opposite to each other. A second annular groove 85 is formed between the second oil sealing member and the second water sealing member of the annular rubber sealing module 8. A clamping steel strip 86 is installed within the second annular groove 85 to tighten the annular rubber sealing module 8 and the multi-limb rubber sealing ring 4 at the roll neck. The inner bore surface 101 of the sealing cover 1 is an annular cylindrical surface. The inner bore surface of the sealing cover 1 is coated with a ceramic layer 102. A ceramic ring 61 is fixed on the end face of the roller 6 that seals with the water seal 2. An annular oil-sparring lip 46 is provided obliquely outward on the first oil-sealing limb 41 of the multi-limb rubber sealing ring 4. A skeleton spring 47 is provided inside the multi-limb rubber sealing ring 4. Multiple cylindrical positioning protrusions 48 are evenly distributed on the bottom circumference of the first annular groove 45 of the multi-limb rubber sealing ring 4. Correspondingly, multiple positioning grooves 86 are evenly distributed on the inner diameter circumference of the annular rubber sealing module 8. When the annular rubber sealing module 8 is located in the first annular groove 45 of the multi-limb rubber sealing ring 4, the positioning protrusions are inserted into the corresponding positioning grooves.
[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 radial modular multi-lip oil film bearing sealing device for a rolling mill roll neck, comprising a sealing cover (1), a water seal (2), an aluminum ring (3), and a multi-limb rubber sealing ring (4), wherein the sealing cover is installed on a bearing seat (5), 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 (6), the multi-limb rubber sealing ring is sleeved on the tapered surface of the roll neck, and is axially positioned on both sides by the aluminum ring and the tapered sleeve (7) of the oil film bearing, wherein the first oil lip (42) at the end of the first oil lip (41) on the multi-limb rubber sealing ring near the tapered sleeve and the first water lip (44) at the end of the first water lip (43) on the multi-limb rubber sealing ring near the aluminum ring are sealed to the inner hole surface (101) of the sealing cover, and a first annular groove (45) is formed between the first oil lip and the first water lip on the multi-limb rubber sealing ring, characterized in that: The first annular groove (45) is provided with an annular rubber sealing module (8) that matches its shape and size. The annular rubber sealing module has a second oil sealing member (81) that is in contact with the first oil sealing member (41) and a second water sealing member (83) that is in contact with the first water sealing member (43). The end of the second oil sealing member has a second oil sealing lip (82) that can seal with the inner hole surface of the sealing cap. The second oil sealing lip and the first oil sealing lip are arranged in opposite directions. The end of the second water sealing member has a second water sealing lip (84) that can seal with the inner hole surface of the sealing cap. The second water sealing lip and the first water sealing lip are arranged in opposite directions. A second annular groove (85) is formed between the second oil sealing member and the second water sealing member of the annular rubber sealing module (8).
2. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: The second annular groove (85) is equipped with a clamping steel strip (86) that can clamp the annular rubber sealing module (8) and the multi-limb rubber sealing ring (4) at the roll neck.
3. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: The inner bore surface (101) of the sealing cap (1) is an annular cylindrical surface.
4. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 3, characterized in that: The inner surface of the sealing cap (1) is coated with a ceramic layer (102).
5. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: A ceramic ring (61) is fixed on the end face of the roller (6) that is sealed to the water seal (2).
6. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: The first oil-sealing limb (41) of the multi-limb rubber sealing ring (4) is provided with an annular oil-sparring lip (46) on the oblique outer side.
7. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: The multi-limb rubber sealing ring (4) is equipped with a skeleton spring (47) inside.
8. The radial modular multi-lip oil film bearing sealing device for rolling mill roll necks as described in claim 1, characterized in that: The bottom circumference of the first annular groove (45) of the multi-limb rubber sealing ring (4) is evenly distributed with a plurality of cylindrical positioning protrusions (48), and correspondingly, the inner diameter circumference of the annular rubber sealing module (8) is evenly distributed with a plurality of positioning grooves (86). When the annular rubber sealing module (8) is located in the first annular groove (45) of the multi-limb rubber sealing ring (4), the positioning protrusions are just inserted into the corresponding positioning grooves.