Water-guided bearing anti-oil-slinging seal ring

Abstract

This utility model belongs to the technical field of bearing sealing rings and discloses an anti-oil-slinging sealing ring for water-guided bearings. It includes a polytetrafluoroethylene (PTFE) coating fixedly installed on both the front and rear sides of the water-guided bearing assembly. A nitrile rubber (NBR) sealing ring is fixedly installed on the outer side of the PTFE coating, and a polyrubber sealing ring is fixedly installed on the outer side of the NBR sealing ring. Through the NBR sealing ring, PTFE coating, polyrubber sealing ring, and sealing ring plate, the NBR ring achieves basic sealing and fit by utilizing its advantages of oil resistance, wear resistance, and good elasticity. The PTFE coating's low coefficient of friction and chemical stability prevent excessive friction between the sealing components and the shaft, and prevent corrosion by the medium. The polyrubber sealing ring supplements the sealing performance, and the sealing ring plate provides auxiliary fixation, support, and enhances the overall structural stability. The combination of these four components effectively prevents oil slinging and water ingress from the water-guided bearing, reduces oil-water mixing, avoids water pollution and bearing failure, and lowers operating costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing sealing rings, specifically an oil-slinging sealing ring for water-conducting bearings. Background Technology

[0002] During the operation of a water-guided bearing, the high-speed rotation of the journal generates centrifugal force, causing lubricating oil to be thrown towards the bearing edge, resulting in oil slinging. In addition, bearing vibration, excessively high oil level in the oil groove, and failure of the sealing device can also exacerbate the oil slinging problem. Oil slinging not only wastes lubricating oil and increases operating costs, but also pollutes the environment around the unit and may even cause safety accidents such as fires. At the same time, oil slinging may also lead to poor bearing lubrication, accelerate bearing wear, shorten bearing service life, and affect the safe and stable operation of the unit.

[0003] Meanwhile, a water guide bearing mounting structure is disclosed (announcement number CN211623801U), including a pump shaft, a water guide bearing, and a fixed housing. The pump shaft passes through the fixed housing, and the water guide bearing is fitted onto the pump shaft and installed inside the fixed housing. The water guide bearing includes a guide bearing and a water guide bearing housing. The inner ring of the guide bearing is connected to the pump shaft by thermal expansion or bonding. The water guide bearing housing is installed on the outer ring of the guide bearing and is fixedly connected to the fixed housing. A gap is provided between the water guide bearing housing and the outer ring of the guide bearing.

[0004] The aforementioned water guide bearing installation structure can only improve the cost of water guide bearing housing parts and reduce maintenance costs, but it cannot play a sealing role, leading to the waste of lubricating oil, increasing operating costs, polluting the environment around the unit, and even causing safety accidents such as fires during use.

[0005] Therefore, a water-guided bearing anti-oil-slinging sealing ring is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides an anti-oil-slinging sealing ring for water-guided bearings. It utilizes the advantages of nitrile rubber rings (oil resistance, wear resistance, and good elasticity) to achieve basic sealing and fit; the low coefficient of friction and chemical stability of the polytetrafluoroethylene coating prevents excessive friction between the sealing components and the shaft, and avoids corrosion from the medium; the polyrubber sealing ring supplements the sealing performance; and the sealing ring plate plays a role in auxiliary fixation, support, and enhancing the overall structural stability. The combination of these four elements effectively prevents oil slinging and water ingress from the water-guided bearing, reduces oil-water mixing, avoids water pollution and bearing failure, and lowers operating costs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a water-guided bearing anti-oil-slinging sealing ring, comprising a polytetrafluoroethylene coating fixedly provided on both the front and rear sides of the interior of the water-guided bearing assembly, a nitrile rubber sealing ring fixedly provided on the outer side of the polytetrafluoroethylene coating, a polyrubber sealing ring fixedly provided on the outer side of the nitrile rubber sealing ring, and a sealing ring plate fixedly provided on the outer side of the polyrubber sealing ring.

[0008] Preferably, the water guide bearing assembly includes an inner ring, and the inner side of the polytetrafluoroethylene coating is attached to the outer side of the inner ring. A rolling element is rotatably provided in the middle of the outer side of the inner ring, and a plurality of rolling elements are provided. A retainer is fixedly provided on the outer side of the rolling element.

[0009] By adopting the above technical solution, the rolling element can rotate in the middle of the outer side of the inner ring, and the multiple rolling elements ensure the stability of the rotation.

[0010] Preferably, an outer ring is fitted to the outer side of the rolling element, and the rolling element rotates inside the middle of the outer ring. A groove is provided in the middle of the top, bottom, left, and right sides of the outer ring.

[0011] By adopting the above technical solution, it is beneficial for the outer ring to cooperate with other components and achieve stable rotation and positioning of the rolling elements.

[0012] Preferably, the polytetrafluoroethylene coating has oil return grooves on both the upper and lower end faces, and the polytetrafluoroethylene coating has oil return grooves on both the left and right end faces on the inner side, and there are eight oil return grooves.

[0013] By adopting the above technical solution, the return flow of lubricating oil can be promoted, ensuring the lubrication effect.

[0014] Preferably, the oil return groove is fixedly provided with an oil return pipe inside, and the sealing ring plate is provided with column grooves on all four sides (left, right, front, and back).

[0015] By adopting the above technical solution, it is beneficial to the circulation of lubricating oil and the connection and cooperation with other components.

[0016] Preferably, a spring buckle is fixedly provided inside the column groove, and the spring buckle is fixed inside the buckle groove.

[0017] By adopting the above technical solution, a firm connection between the sealing ring plate and the outer ring is achieved, enhancing the overall stability of the component.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model utilizes a nitrile rubber sealing ring, a polytetrafluoroethylene coating, a polyrubber sealing ring, and a sealing ring plate. The nitrile rubber ring achieves basic sealing and fit by leveraging its advantages such as oil resistance, wear resistance, and good elasticity. The polytetrafluoroethylene coating's low coefficient of friction and chemical stability prevent excessive friction between the sealing components and the shaft, as well as corrosion from the medium. The polyrubber sealing ring supplements the sealing performance, and the sealing ring plate plays a role in auxiliary fixation, support, and enhancing the overall structural stability. The combination of these four components effectively prevents oil from splashing out of the water-guided bearing and water from entering, reduces oil-water mixing, avoids water pollution and bearing failure accidents, and lowers operating costs.

[0020] 2. This utility model utilizes an oil return groove and an oil return pipe. The oil return groove allows lubricating oil to flow into the groove under centrifugal force and return to the oil pan, ensuring no oil remains on the shaft and reducing journal wear. The oil return pipe ensures stable oil sealing of the water-guided bearing, extending its service life, and maintains pressure balance inside and outside the oil groove, preventing oil splattering. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the installation structure of the water guide bearing assembly of this utility model;

[0023] Figure 3 This is a schematic diagram of the installation structure of the polyrubber sealing ring of this utility model;

[0024] Figure 4 This utility model Figure 3 A schematic diagram of the installation structure.

[0025] In the diagram: 1. Water-guided bearing assembly; 111. Outer ring; 112. Inner ring; 113. Rolling element; 114. Cage; 2. Snap groove; 3. Sealing ring plate; 4. Spring snap; 5. PTFE coating; 6. Nitrile rubber sealing ring; 7. Polypropylene rubber sealing ring; 8. Column groove; 9. Oil return groove; 10. Oil return pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The following describes an embodiment of this utility model based on its overall structure.

[0028] like Figures 1 to 4As shown, this utility model provides an anti-oil-slinging sealing ring for a water-guided bearing, including a polytetrafluoroethylene coating 5 fixedly provided on both the front and rear sides of the water-guided bearing assembly 1 for sealing, a nitrile rubber sealing ring 6 fixedly provided on the outer side of the polytetrafluoroethylene coating 5 for sealing, a polyrubber sealing ring 7 fixedly provided on the outer side of the nitrile rubber sealing ring 6, and a sealing ring plate 3 fixedly provided on the outer side of the polyrubber sealing ring 7 for sealing.

[0029] The water guide bearing assembly 1 includes an inner ring 112, and the inner side of the polytetrafluoroethylene coating 5 is attached to the outer side of the inner ring 112. A rolling element 113 is rotatably provided in the middle of the outer side of the inner ring 112 to perform rotation. Several rolling elements 113 are provided, and a retainer 114 is fixedly provided on the outer side of the rolling elements 113 to perform fixation.

[0030] The outer ring 111 is attached to the outer side of the rolling element 113, and the rolling element 113 rotates in the middle of the outer ring 111. The four sides of the outer ring 111 are provided with a retaining groove 2 to fix the rolling element inside the groove.

[0031] The upper and lower ends of the polytetrafluoroethylene coating 5 are provided with oil return grooves 9 to facilitate oil circulation. The inner left and right ends of the polytetrafluoroethylene coating 5 are also provided with oil return grooves 9, and there are eight oil return grooves 9.

[0032] The oil return groove 9 is equipped with a fixed oil return pipe 10 to return oil. The sealing ring plate 3 has column grooves 8 on its left, right, front and back sides.

[0033] The inside of the column groove 8 is fixed with a spring buckle 4 for fixing, and the spring buckle 4 is fixed inside the buckle groove 2.

[0034] Working principle and process of the anti-oil-slinging sealing ring for water-guided bearings:

[0035] The main working objective of the water guide bearing anti-oil-throw sealing ring is to prevent lubricating oil from being thrown out and to ensure the normal operation of the water guide bearing assembly 1. Its working principle is based on the material characteristics and structural design of each component. The polytetrafluoroethylene coating 5 has an extremely low coefficient of friction and good chemical stability. It is fixed on the front and rear sides inside the water guide bearing assembly 1. On the one hand, it fits against the outer side of the inner ring 112, which can reduce the friction force when the inner ring 112 rotates and reduce energy loss.On the other hand, it provides a stable foundation for the subsequent sealing structure, preventing lubricating oil from directly contacting other components and leaking. The nitrile rubber sealing ring 6 and the polyrubber sealing ring 7, with nitrile rubber having good oil resistance and polyrubber also having certain sealing performance, are sequentially arranged on the outside of the polytetrafluoroethylene coating 5 to form a multi-layer sealing structure. This multi-layer seal can effectively prevent lubricating oil from leaking to the outside. Even if a small amount of lubricating oil breaks through the defense of the polytetrafluoroethylene coating 5, it will be intercepted by the nitrile rubber sealing ring 6 and the polyrubber sealing ring 7. The sealing ring plate 3, as the outermost sealing component, further enhances the overall sealing effect. It is fixedly connected to the buckle groove 2 on the outer ring 111 via the spring buckle 4, ensuring the stability of the entire sealing structure and preventing external impurities from entering the water guide bearing assembly 1. It also prevents lubricating oil from leaking from the side. Oil return grooves 9 are provided on the upper and lower end faces and the inner left and right end faces of the polytetrafluoroethylene coating 5, and oil return pipes 10 are fixedly installed inside the oil return grooves 9. When the lubricating oil flows inside the water guide bearing assembly 1, due to factors such as centrifugal force generated by rotation, some lubricating oil may be splashed onto the polytetrafluoroethylene coating. On the surface of the ethylene coating 5, the oil return groove 9 can collect the lubricating oil and guide it back to the lubricating oil circulation system through the oil return pipe 10, realizing the recycling and reuse of lubricating oil, reducing the waste of lubricating oil, and also avoiding the accumulation of lubricating oil at the sealing structure, which would lead to seal failure. The PTFE coating 5 is fixed on the front and rear sides of the inside of the water guide bearing assembly 1, so that its inner side is in contact with the outer side of the inner ring 112. Nitrile rubber sealing ring 6 and polyrubber sealing ring 7 are installed in sequence on the outer side of the PTFE coating 5, ensuring that the sealing ring is tightly fitted. A sealing ring is installed on the outer side of the polyrubber sealing ring 7. The sealing ring plate 3 is installed, and the spring buckle 4 is installed in the groove 8 of the sealing ring plate 3. The outer ring 111 is fitted onto the outside of the rolling element 113, so that the rolling element 113 can rotate inside the middle of the outer ring 111. The spring buckle 4 is inserted into the buckle groove 2 opened in the middle of the four sides of the outer ring 111, completing the fixed connection between the sealing ring plate 3 and the outer ring 111. The oil return pipe 10 is installed in the oil return groove 9 opened in the polytetrafluoroethylene coating 5. The water guide bearing assembly 1 starts to operate. The inner ring 112 rotates relative to the outer ring 111. Under the action of the cage 114, the rolling element 113 rotates between the inner ring 112 and the outer ring 111. The rolling elements 113 and 113 rotate to achieve the bearing's rotation function. Lubricating oil circulates within the water-guided bearing assembly 1, providing lubrication for components such as the rolling elements 113. During rotation, some lubricating oil may be splashed onto the surface of the PTFE coating 5. This splashed oil is collected by the oil return groove 9 and returned to the lubricating oil circulation system via the oil return pipe 10. The nitrile rubber sealing ring 6, the polyurethane sealing ring 7, and the sealing ring plate 3 work together to prevent lubricating oil leakage to the outside and to prevent external impurities from entering the water-guided bearing assembly 1, ensuring its normal operation.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-lubricated bearing anti-whirl oil seal ring, comprising a water-lubricated bearing assembly (1), characterized in that: The water-guided bearing assembly (1) has a polytetrafluoroethylene coating (5) fixed on both the front and rear sides inside. A nitrile rubber sealing ring (6) is fixed on the outside of the polytetrafluoroethylene coating (5). A polyrubber sealing ring (7) is fixed on the outside of the nitrile rubber sealing ring (6). A sealing ring plate (3) is fixed on the outside of the polyrubber sealing ring (7).

2. The hydrodynamic bearing anti-fling oil seal ring of claim 1, wherein: The water guide bearing assembly (1) includes an inner ring (112), and the inner side of the polytetrafluoroethylene coating (5) is attached to the outer side of the inner ring (112). A rolling element (113) is rotatably provided in the middle of the outer side of the inner ring (112), and a plurality of rolling elements (113) are provided. A retainer (114) is fixedly provided on the outer side of the rolling element (113).

3. The hydrodynamic bearing anti-fling seal ring of claim 2, wherein: The outer ring (111) is attached to the outer side of the rolling body (113), and the rolling body (113) rotates in the middle of the inner ring (111). The outer ring (111) has a groove (2) in the middle of its four sides (upper, lower, left, and right).

4. The hydrodynamic bearing anti-fling seal ring of claim 1, wherein: The polytetrafluoroethylene coating (5) has oil return grooves (9) on both the upper and lower ends, and the polytetrafluoroethylene coating (5) has oil return grooves (9) on both the left and right ends, and there are eight oil return grooves (9).

5. The hydrodynamic bearing anti-fling oil seal ring of claim 4, wherein: The oil return groove (9) is fixedly equipped with an oil return pipe (10), and the sealing ring plate (3) is provided with column grooves (8) on the left, right, front and back sides.

6. The hydrodynamic bearing anti-fling oil seal ring of claim 5, wherein: The column groove (8) is fixedly provided with a spring buckle (4), and the spring buckle (4) is fixed inside the buckle groove (2).

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