A double-direction sealing structure of a slewing bearing

Abstract

The utility model discloses a kind of two-way sealing structure of slewing bearing, including outer ring, the inside of outer ring is equipped with inner ring, annular mounting groove is opened in the inside of outer ring top, the bottom of the inner cavity of annular mounting groove is fixedly installed with first spring, the upper end of first spring is fixedly installed with first sealing ring, the top of first sealing ring is distributed above outer ring, the inside of inner ring is equidistantly opened with movable slot, the bottom of first sealing ring inner end is attached with second sealing ring.This utility model is formed by setting first sealing ring and second sealing ring, forms two-way sealing structure, can effectively block dust, impurity, moisture etc. from two directions into slewing bearing inside, prevent internal lubricating grease leakage at the same time, greatly improve the sealing performance of slewing bearing, prolong the service life of slewing bearing, ensure the stable operation of slewing bearing under complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of slewing bearing technology, specifically a bidirectional sealing structure for a slewing bearing. Background Technology

[0002] In existing technologies, slewing bearings are widely used in fields such as engineering machinery, wind power generation, and port machinery. During operation, the sealing performance of slewing bearings plays a crucial role in their service life and operational reliability. Traditional slewing bearing sealing structures often only achieve unidirectional sealing, making it difficult to simultaneously and effectively prevent the intrusion of external dust, moisture, and other impurities, as well as the leakage of internal lubricating grease. Moreover, existing sealing structures experience a significant decrease in sealing effectiveness under complex working conditions, which can easily lead to sealing failure and thus affect the normal operation of the slewing bearing. Utility Model Content

[0003] The purpose of this invention is to provide a bidirectional sealing structure for a slewing bearing, which has the advantage of bidirectional sealing.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional sealing structure for a slewing bearing, comprising an outer ring, an inner ring installed inside the outer ring, an annular mounting groove formed on the inner side of the top of the outer ring, a first spring fixedly installed at the bottom of the inner cavity of the annular mounting groove, a first sealing ring fixedly installed at the upper end of the first spring, the top of the first sealing ring being distributed above the outer ring, movable grooves formed at equal intervals in the inner ring, and a second sealing ring fitted to the bottom of the inner end of the first sealing ring, the second sealing ring being distributed entirely above the inner ring.

[0005] As a preferred embodiment, the outer coating of the outer ring consists of a metal coating, an anti-corrosion coating, and an anti-rust coating. The outer surface of the metal coating is coated with an anti-corrosion coating, and the outer surface of the anti-corrosion coating is coated with an anti-rust coating.

[0006] As a preferred embodiment, a second spring is fixedly installed inside the movable groove, an elastic telescopic block is fixedly installed at the inner end of the second spring, a connecting plate is fixedly installed at the outer end of the elastic telescopic block, and the upper end of the connecting plate is connected to the bottom of the inner end of the second sealing ring.

[0007] As a preferred embodiment, the upper end of the second sealing ring and the bottom of the first sealing ring are provided with an annular groove, and one end of the second sealing ring is located inside the annular groove and is limited by a protrusion.

[0008] As a preferred embodiment, the elastic telescopic block adopts a movable design, and its outer wall fits against its inner wall inside the movable groove.

[0009] As a preferred embodiment, an inclined guide slope is provided at the top edge of the inner ring, and the guide slope is inclined toward the direction of the first sealing ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. By setting a first sealing ring and a second sealing ring, this utility model forms a two-way sealing structure, which can effectively block external dust, impurities, moisture and other substances from entering the slewing bearing from two directions, while preventing internal lubricating grease leakage. This greatly improves the sealing performance of the slewing bearing, extends its service life, and ensures the stable operation of the slewing bearing under complex working conditions.

[0012] 2. This utility model utilizes a composite structure of a metal coating, an anti-corrosion coating, and an anti-rust coating on the outer ring to form a multi-layered protective barrier. The metal coating provides basic strength, the anti-corrosion coating effectively resists chemical corrosion, and the anti-rust coating isolates air and moisture. The three work together to comprehensively resist the corrosion of the slewing bearing outer ring by the external environment, greatly improving the slewing bearing's adaptability under harsh working conditions. The excellent anti-corrosion and anti-rust performance effectively slows down the aging and damage rate of the outer ring, significantly extending the overall service life of the slewing bearing. This not only reduces the frequency of equipment replacement due to slewing bearing damage and reduces equipment downtime for maintenance, but also saves the high costs incurred by frequent slewing bearing replacements. In the long run, this significantly improves the economic efficiency of equipment use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the sealing structure of this utility model;

[0015] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0016] Figure 4 This utility model Figure 3 A magnified view of a section at point A in the middle;

[0017] Figure 5 This is a schematic diagram of the external structure of the outer ring of this utility model.

[0018] In the diagram: 1. Outer ring; 2. Inner ring; 3. Annular mounting groove; 4. First spring; 5. First sealing ring; 6. Movable groove; 7. Second spring; 8. Elastic telescopic block; 9. Connecting plate; 10. Second sealing ring; 11. Metal coating; 12. Anti-corrosion coating; 13. Anti-rust coating. Detailed Implementation

[0019] 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.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example

[0021] Please see Figure 1 As shown, this utility model provides a bidirectional sealing structure for a slewing bearing, including an outer ring 1, an inner ring 2 installed inside the outer ring 1, an annular mounting groove 3 is formed on the inner side of the top of the outer ring 1, a first spring 4 is fixedly installed at the bottom of the inner cavity of the annular mounting groove 3, a first sealing ring 5 is fixedly installed at the upper end of the first spring 4, the top of the first sealing ring 5 is distributed above the outer ring 1, the inner ring 2 has movable grooves 6 formed at equal intervals in an annular shape inside, and a second sealing ring 10 is fitted to the bottom of the inner end of the first sealing ring 5, the second sealing ring 10 is distributed above the inner ring 2.

[0022] This technical solution forms a bidirectional sealing structure by setting a first sealing ring 5 and a second sealing ring 10. This structure can effectively block external dust, impurities, moisture, etc. from entering the slewing bearing from two directions, while preventing internal lubricating grease leakage. This greatly improves the sealing performance of the slewing bearing, extends its service life, and ensures the stable operation of the slewing bearing under complex working conditions. Example

[0023] Based on Embodiment 1, this utility model is as follows: Figure 5 As shown, the outer coating of the outer ring 1 is composed of a metal coating 11, an anti-corrosion coating 12 and an anti-rust coating 13. The outer surface of the metal coating 11 is coated with the anti-corrosion coating 12, and the outer surface of the anti-corrosion coating 12 is coated with the anti-rust coating 13.

[0024] Adopting such Figure 1The technical solution shown employs a composite structure of a metal coating 11, an anti-corrosion coating 12, and an anti-rust coating 13 for the outer ring 1, forming a multi-layered protective barrier. The metal coating 11 provides basic strength, the anti-corrosion coating 12 effectively resists chemical corrosion, and the anti-rust coating 13 isolates air and moisture. The three work together to comprehensively resist the corrosion of the slewing bearing's outer ring 1 by the external environment, greatly improving the slewing bearing's adaptability under harsh working conditions. The excellent anti-corrosion and anti-rust performance effectively slows down the aging and damage rate of the outer ring 1, significantly extending the overall service life of the slewing bearing. This not only reduces the frequency of equipment replacement due to slewing bearing damage and reduces equipment downtime for maintenance, but also saves the high costs incurred by frequent slewing bearing replacements. In the long run, this significantly improves the economic efficiency of equipment use.

[0025] Secondly, in the technical solution, a second spring 7 is fixedly installed inside the movable groove 6, an elastic telescopic block 8 is fixedly installed at the inner end of the second spring 7, a connecting plate 9 is fixedly installed at the outer end of the elastic telescopic block 8, and the upper end of the connecting plate 9 is connected to the bottom of the inner end of the second sealing ring 10; an annular groove is provided at the fitting part between the upper end of the second sealing ring 10 and the bottom of the first sealing ring 5, and one end of the second sealing ring 10 is located inside the annular groove and is limited by a protruding block.

[0026] Its adoption is as follows Figure 1 The technical solution shown in the figure is that the second spring 7, the elastic telescopic block 8 and the connecting plate 9 in the movable groove 6 constitute a dynamic adjustment component. When the slewing bearing is in operation, if it is subjected to vibration, impact or relative displacement between components, the second spring 7 will compress or extend according to the force, pushing the elastic telescopic block 8 to move flexibly in the movable groove 6. Through the transmission of the connecting plate 9, the second sealing ring 10 can adjust its position in real time and always keep it in close contact with the first sealing ring 5. This adaptive mechanism ensures that the sealing structure can continue to play a good sealing role under complex and changing working conditions, effectively blocking the intrusion of external impurities and the leakage of internal grease.

[0027] The second sealing ring 10 and the first sealing ring 5 are precisely connected by an annular groove and a protruding block. During installation, the protruding block is embedded in the annular groove, allowing the two to be quickly positioned. Under the working conditions of high-speed rotation and frequent start-stop of the slewing bearing, the annular groove and the protruding block engage with each other to form a stable mechanical constraint, preventing the second sealing ring 10 from shifting or falling off due to centrifugal force, friction, and other factors, ensuring the integrity and reliability of the sealing structure, and further improving the sealing performance and working stability of the slewing bearing. Example

[0028] This utility model is as follows Figures 1-5As shown, the elastic telescopic block 8 adopts a movable design, and its outer wall is in contact with its inner wall inside the movable groove 6; an inclined guide slope is provided at the top edge of the inner ring 2, and the guide slope is inclined towards the first sealing ring 5.

[0029] Using the above technical solution, the elastic telescopic block 8 adopts a movable design and fits tightly against the inner wall of the movable groove 6, allowing it to slide flexibly within the movable groove 6 during the operation of the slewing bearing, based on complex working conditions such as the relative displacement and vibration of the inner and outer rings. The inclined guide slope at the top of the inner ring 2 can fully utilize the centrifugal force and gravity generated when the slewing bearing rotates to quickly and efficiently guide foreign objects such as dust, impurities, and moisture that enter the slewing bearing to the first sealing ring 5. Combined with the blocking effect of the first sealing ring 5, the probability of foreign objects entering the core part of the slewing bearing is greatly reduced, internal parts wear is reduced, the service life of lubricating grease is extended, and the sealing reliability and overall performance of the slewing bearing in harsh environments such as high pollution and humidity are significantly improved.

[0030] The working principle of this utility model is as follows: When the slewing bearing is in operation, the first sealing ring 5 is tightly attached to the top of the outer ring 1 under the elastic tension of the first spring 4 in the annular mounting groove 3, which acts as the first line of defense to intercept dust, impurities and moisture falling and splashing from above the outer ring 1. The second sealing ring 10 is always tightly attached to the bottom of the first sealing ring 5 under the cooperation of the second spring 7, the elastic telescopic block 8 and the connecting plate 9 in the movable groove 6, forming the second line of defense to block foreign objects from invading from the inner ring 2 and prevent internal lubricating grease from leaking outward. The two together form a two-way sealing barrier.

[0031] When the slewing bearing is subjected to complex external loads, and the inner ring 2 and outer ring 1 experience relative displacement, vibration, or deformation, the second spring 7 in the movable groove 6 will compress or extend according to the force. The extension and contraction of the second spring 7 will cause the elastic telescopic block 8 to slide flexibly in the movable groove 6. The elastic telescopic block 8 will transmit the displacement to the second sealing ring 10 through the connecting plate 9, so that the second sealing ring 10 can adaptively adjust its position and continuously fit tightly with the first sealing ring 5. Even if the working conditions change continuously, the sealing structure can be guaranteed not to fail and a good sealing effect can be maintained.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A bidirectional sealing structure for a slewing bearing, comprising an outer ring (1), characterized in that: An inner ring (2) is installed inside the outer ring (1). An annular mounting groove (3) is opened on the inner side of the top of the outer ring (1). A first spring (4) is fixedly installed at the bottom of the inner cavity of the annular mounting groove (3). A first sealing ring (5) is fixedly installed at the upper end of the first spring (4). The top of the first sealing ring (5) is distributed above the outer ring (1). An movable groove (6) is opened at equal intervals in the inner ring (2). A second sealing ring (10) is fitted to the bottom of the inner end of the first sealing ring (5). The second sealing ring (10) is distributed above the inner ring (2).

2. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: The outer coating of the outer ring (1) consists of a metal coating (11), an anti-corrosion coating (12) and an anti-rust coating (13). The outer surface of the metal coating (11) is coated with the anti-corrosion coating (12), and the outer surface of the anti-corrosion coating (12) is coated with the anti-rust coating (13).

3. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: A second spring (7) is fixedly installed inside the movable groove (6). An elastic telescopic block (8) is fixedly installed at the inner end of the second spring (7). A connecting plate (9) is fixedly installed at the outer end of the elastic telescopic block (8). The upper end of the connecting plate (9) is connected to the bottom of the inner end of the second sealing ring (10).

4. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: The upper end of the second sealing ring (10) and the bottom of the first sealing ring (5) are provided with an annular groove, and one end of the second sealing ring (10) is located inside the annular groove and is limited by a protruding block.

5. The bidirectional sealing structure of a slewing bearing according to claim 3, characterized in that: The elastic telescopic block (8) adopts a movable design, and its outer wall is in contact with its inner wall inside the movable groove (6).

6. The bidirectional sealing structure of a slewing bearing according to claim 1, characterized in that: An inclined guide slope is provided at the top edge of the inner ring (2), and the guide slope is inclined toward the first sealing ring (5).

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