Rotary bearing with good sealing effect

Abstract

The utility model discloses a kind of rotary bearing with good sealing effect, it is related to bearing technical field.The rotary bearing includes bearing outer ring, bearing inner ring, sealing ring, first washer, second washer and sealing ring.Sealing ring is installed in the gap between bearing outer ring and bearing inner ring, and is fixed by screw and bearing inner ring connection, sealing ring outside is provided with fixed edge and inserted edge, inserted edge is equipped with the sleeve groove for installing sealing ring, sealing ring outside is equipped with support piece.First washer and second washer are respectively installed in bearing inner ring and outer ring two ends, effectively block impurity and lubricating grease leakage by multiple sealing structure.The scheme compact structure, assembly and maintenance are convenient, multiple sealing protection of rotary bearing can be realized, sealing performance and service life are significantly improved, and it is applicable to rotary equipment under a variety of complex working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, specifically relating to a rotary bearing with good sealing performance. Background Technology

[0002] Slewing bearings, as critical support components in mechanical equipment, are widely used in engineering machinery, automation equipment, wind power generation, and other fields. During long-term operation, slewing bearings are often exposed to complex environments such as dust, moisture, and oil, which can easily lead to impurities entering the bearing, causing lubrication failure, rolling element wear, and increased operating resistance. To prevent the intrusion of external foreign objects and improve the reliability and service life of the bearing, the design and performance of the sealing structure are particularly important.

[0003] Currently, commonly used sealing methods for slewing bearings mainly include single-layer rubber seals, metal gaskets with additional seals, and labyrinth seals. While these sealing methods can block dust and moisture to some extent, they often have the following shortcomings:

[0004] On the one hand, some sealing structures are cumbersome to assemble, and the replacement and maintenance of sealing elements are inconvenient, affecting the efficiency of rapid assembly and repair of bearings. On the other hand, a single sealing structure cannot effectively seal multiple gaps between the outer and inner rings of the bearing simultaneously, easily causing local seal failure, leading to foreign matter infiltration and grease leakage. In addition, some sealing structures are not compact enough, and gaps are easily generated between the sealing elements, which affects the sealing effect and fails to achieve multiple sealing protection for the bearing.

[0005] Existing slewing bearing sealing structures still face practical technical challenges in terms of sealing performance, ease of assembly, and seal replacement. For example, current assembly methods often rely solely on a single washer or sealing ring to seal the clearance port, which is insufficient to effectively protect the inner side of the bearing clearance. Furthermore, the sealing ring exhibits poor stability after assembly and is prone to displacement due to bearing operation, leading to seal failure. Utility Model Content

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a slewing bearing with good sealing performance. It can achieve effective multiple sealing of multiple key gaps in the slewing bearing at the same time, significantly improving the sealing performance of the slewing bearing.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rotary bearing with good sealing performance includes an outer ring and an inner ring. Sealing rings are provided on both the left and right sides of the outer ring, and the sealing rings are stuck in the gap between the outer ring and the inner ring.

[0009] Annular second washers are installed on both the left and right sides of the outer ring of the bearing, and the sealing ring abuts against the second washers;

[0010] The sealing ring is fitted on the outside of the bearing inner ring and is fixed to the bearing inner ring by screws. A first washer is fitted on the outside of the bearing inner ring at the position corresponding to the sealing ring.

[0011] The sealing ring is fitted with two sealing rings, one on the left and one on the right, in the gap between the outer ring and the inner ring of the bearing.

[0012] Furthermore, a protruding fixing edge is fixed on the outer side of the sealing ring, and an installation hole is provided on the fixing edge. An insert edge is fixed on the inner side of the sealing ring, which is inserted into the gap between the outer ring and the inner ring of the bearing. Two sleeve grooves are provided on the outer side of the insert edge.

[0013] Furthermore, the sealing ring is fitted into the groove, and several annular support pieces are fixed on the outer circumferential surface of the sealing ring.

[0014] Furthermore, the outer circumferential surface of the first washer is provided with several annular first ribs, the outer side of the bearing inner ring is provided with an installation groove for installing the first washer, and the outer side of the bearing inner ring is also provided with several evenly distributed threaded holes.

[0015] Furthermore, the outer side of the second washer is provided with several annular second ribs, and the side of the outer ring of the bearing is provided with a groove for mounting the second washer.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention simplifies the assembly process of the sealing assembly by setting sealing rings at both ends of the bearing outer ring and inserting them into the gap between the bearing outer ring and inner ring, while providing a fixing edge on the outside of the sealing ring and securing it with screws. This structure enables quick disassembly and convenient replacement of the sealing element, greatly improving bearing maintenance efficiency and solving the practical problems of cumbersome sealing assembly and inconvenient maintenance in existing technologies.

[0018] By placing second washers on the end faces of the bearing outer ring and pressing the sealing ring tightly onto these second washers, while simultaneously installing a first washer on the outer side of the bearing inner ring, a multi-layer sealing structure is formed, achieving highly efficient sealing of multiple critical gaps between the bearing outer and inner rings. This multi-layer sealing structure effectively prevents external moisture, dust, and other impurities from entering the bearing, while also preventing grease leakage. It solves the problems of limited sealing effect and easy failure of sealing parts in existing single-seal methods, significantly improving the sealing performance and service life of the bearing.

[0019] By creating a groove at the insertion edge of the sealing ring and installing the sealing ring within the groove, with a support plate on the outside of the sealing ring, the sealing ring can be effectively supported and positioned during bearing operation, preventing displacement or deformation. This structure can adapt to minute changes in bearing clearance, further enhancing the stability and durability of the sealing system, avoiding seal failure due to component displacement, and improving the operational reliability of slewing bearings under complex operating conditions. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention;

[0021] Figure 2 This is a partial structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the sealing ring of this utility model;

[0023] Figure 4 This is a schematic diagram of the first washer of this utility model;

[0024] Figure 5 This is a schematic diagram of the sealing ring of this utility model;

[0025] Figure 6 This is a schematic diagram of the second washer of this utility model;

[0026] Figure 7 This is a schematic diagram of the bearing inner ring of this utility model;

[0027] Figure 8 This is a schematic diagram of the bearing outer ring of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Bearing outer ring; 11. Slot; 2. Sealing ring; 21. Mounting hole; 22. Fixing edge; 23. Insertion edge; 24. Sleeve groove; 3. Bearing inner ring; 31. Mounting groove; 32. Threaded hole; 4. First washer; 41. First rib; 5. Sealing ring; 51. Support plate; 6. Second washer; 61. Second rib. Detailed Implementation

[0030] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0031] Example 1:

[0032] like Figure 1 and Figure 2As shown, a slewing bearing with good sealing performance includes an outer ring 1 and an inner ring 3. Sealing rings 2 are provided on both sides of the outer ring 1, and the sealing rings 2 are fitted into the gap between the outer ring 1 and the inner ring 3. The outer ring 1 is integrally machined from high-strength alloy steel, ensuring excellent load-bearing capacity and wear resistance. The inner ring 3 is also manufactured using high-precision machining, with an appropriate gap between its outer surface and the outer ring 1, providing a structural basis for the installation of the sealing structure and multiple sealing effects. The sealing rings 2, as a key sealing component, are made of elastic polymer material, forming a reliable physical barrier in the gap between the outer ring 1 and the inner ring 3, effectively preventing leakage of external impurities and grease, and improving the overall sealing performance of the slewing bearing. In actual operation, the two sides of the sealing rings 2 are completely symmetrical, distributed at the left and right ends of the outer ring 1, effectively achieving all-round sealing protection at both ends of the bearing.

[0033] Annular second washers 6 are installed on both sides of the outer ring 1 of the bearing, and the sealing ring 2 abuts against the second washers 6. The second washers 6 are made of high-strength corrosion-resistant metal material and have an overall annular structure, which can fit tightly in the end face groove 11 of the outer ring 1 of the bearing to achieve a stable fit with the sealing ring 2. The end face of the sealing ring 2 and the second washers 6 are pressed together, and through precise structural matching, grease leakage along the bearing end face is effectively prevented, while preventing external moisture, dust and other foreign objects from entering the bearing. The annular structure of the second washers 6 provides an additional sealing barrier at the port, making the sealing system more reliable and durable, and fully meeting the needs of slewing bearings under harsh working conditions.

[0034] The sealing ring 2 is fitted onto the outer side of the bearing inner ring 3 and is fixed to the bearing inner ring 3 by screws. A first washer 4 is fitted onto the outer side of the bearing inner ring 3 at the position corresponding to the sealing ring 2. The sealing ring 2 is securely connected to the bearing inner ring 3 through evenly distributed mounting holes 21 and screws, ensuring that the sealing ring 2 remains stably positioned during bearing operation. The first washer 4 is made of high wear-resistant metal material, and its annular structure ensures that it can be fitted onto the outer side of the bearing inner ring 3 and accurately positioned within the mounting groove 31. The tight fit between the first washer 4 and the sealing ring 2 forms a stable sealing layer on the inner ring side, further improving the overall sealing performance of the slewing bearing. The bearing inner ring 3, the sealing ring 2, and the first washer 4 together constitute a multi-layer sealing system on the end face, effectively suppressing grease leakage and foreign matter intrusion, and meeting high reliability sealing requirements.

[0035] The sealing ring 2 is fitted with two sealing rings 5 ​​on the left and right sides in the gap between the outer ring 1 and the inner ring 3 of the bearing. The sealing rings 5 ​​are made of elastic rubber material, which has good resilience and sealing performance. The two sealing rings 5 ​​are respectively installed in the grooves 24 on the insertion edge 23 of the sealing ring 2. The sealing rings 5 ​​are tightly fitted with the insertion edge 23, the outer ring 1 and the inner ring 3 of the bearing, forming an efficient internal sealing barrier. The sealing rings 5 ​​can maintain deformation stability during bearing rotation and stress, effectively compensate for gap changes, ensure that the bearing sealing system still has excellent sealing performance under long-term operation, and comprehensively improve the applicability of the slewing bearing in complex environments.

[0036] like Figure 3 As shown, a raised fixing edge 22 is fixed on the outer side of the sealing ring 2, and an installation hole 21 is provided on the fixing edge 22. An insert edge 23 is fixed on the inner side of the sealing ring 2, which is inserted into the gap between the outer ring 1 and the inner ring 3 of the bearing. Two sleeve grooves 24 are provided on the outer side of the insert edge 23. The fixing edge 22 is made by an integral molding process to ensure the overall structural strength of the sealing ring 2. The design of the installation hole 21 facilitates the precise insertion of screws and their mating with the threaded hole 32 on the inner ring 3 of the bearing, so as to achieve a high-strength assembly between the sealing ring 2 and the inner ring 3 of the bearing. The insert edge 23 has an annular flange structure, the size of which is adapted to the gap between the outer ring 1 and the inner ring 3 of the bearing. Through precise insertion, it effectively prevents external impurities from penetrating into the bearing. The sleeve grooves 24 on both sides of the insert edge 23 provide a dedicated positioning space for the installation of the sealing ring 5, ensuring that the sealing ring 5 can be stably fixed in it, realizing the efficient cooperation between the sealing ring 2 and other sealing components, thereby improving the overall multi-seal protection capability of the slewing bearing.

[0037] like Figure 4 As shown, the sealing ring 5 is fitted inside the sleeve groove 24, and several annular support plates 51 are fixed on the outer circumferential surface of the sealing ring 5. The support plates 51 are made of highly elastic and wear-resistant material and are evenly distributed on the outer circumferential surface of the sealing ring 5. They can effectively support the sealing ring 5 during bearing assembly and operation, prevent the sealing ring 5 from shifting and deforming, and ensure that the sealing ring 5 is always tightly fitted with the insertion edge 23 and the gap between the outer ring 1 and the inner ring 3 of the bearing. The setting of the support plates 51 not only improves the structural stability of the sealing ring 5, but also enhances the pressure resistance and wear resistance of the overall sealing system, which helps to extend the service life of the sealing ring 5 and the entire bearing.

[0038] like Figure 5 and Figure 6As shown, the outer circumferential surface of the first washer 4 is provided with several annular first ribs 41, and the outer side of the bearing inner ring 3 is provided with an installation groove 31 for installing the first washer 4, and the outer side of the bearing inner ring 3 is also provided with several evenly distributed threaded holes 32; the first ribs 41 are annular and evenly distributed, forming multi-point support in the installation groove 31 of the bearing inner ring 3, enhancing the fit stability and compressive strength between the first washer 4 and the bearing inner ring 3, and effectively preventing the sealing components from loosening and shifting under long-term operation; the threaded holes 32 cooperate with the installation holes 21 on the sealing ring 2, allowing assembly and fixation by screws, thereby ensuring that the sealing ring 2, the first washer 4 and the bearing inner ring 3 form a tight assembly, further improving the sealing reliability of the slewing bearing under high-intensity working conditions.

[0039] like Figure 7 and Figure 8 As shown, the outer surface of the second washer 6 is provided with several annular second ribs 61, and the side of the bearing outer ring 1 is provided with a groove 11 for mounting the second washer 6. The second ribs 61 are evenly distributed on the outer circumference of the second washer 6, which can achieve multi-point engagement with the groove 11 of the bearing outer ring 1, effectively improving the assembly firmness and vibration resistance of the second washer 6 on the side of the bearing outer ring 1. The precise machining of the groove 11 provides a reliable positioning basis for the assembly of the second washer 6, ensuring that the second washer 6 can always stably form a pressed state with the sealing ring 2 during the operation of the bearing, thereby greatly improving the sealing effect at the bearing end, reducing the risk of grease leakage, and meeting the actual application requirements of high sealing performance and high reliability rotary bearings.

[0040] Example 2:

[0041] like Figures 1-8 As shown, referring to the overall structure of the slewing bearing, it specifically includes the outer ring 1, the inner ring 3, the sealing ring 2, the first washer 4, the second washer 6, the sealing ring 5, the support plate 51, the fixed edge 22, the insertion edge 23, the mounting hole 21, the sleeve groove 24, the first rib 41, the second rib 61, the mounting groove 31, the retaining groove 11, and the threaded hole 32.

[0042] In this embodiment, when assembling the slewing bearing, a high-precision machined outer ring 1 and inner ring 3 are used as the structural foundation. The outer ring 1 has pre-drilled grooves 11 at both ends for subsequent installation of the second washer 6. The second washer 6 is inserted into the grooves 11, and the second ribs 61 distributed on the outer side of the second washer 6 engage with the inner wall of the groove 11 at multiple points, ensuring the washer is firmly positioned and has good vibration resistance. The second washer 6, as an end-face seal, forms the first sealing barrier with the subsequently installed sealing ring 2, effectively blocking external impurities and moisture.

[0043] Next, the first washer 4 is assembled in the mounting grooves 31 pre-set on the outer sides of both ends of the bearing inner ring 3. Several first ribs 41 are evenly distributed in a ring on the outer side of the first washer 4, forming multi-point support within the mounting grooves 31. This ensures the first washer 4 remains stable under high load and high speed operation, preventing loosening or displacement. Furthermore, threaded holes 32 are evenly distributed on the outer side of the bearing inner ring 3, providing precise connection points for the subsequent fixing of the sealing ring 2.

[0044] The sealing ring 2 is made of a high-polymer elastic material, with an integrally formed fixing edge 22 on its outer side. Mounting holes 21 are evenly spaced on the fixing edge 22. When installing the sealing ring 2, the mounting holes 21 are aligned with the threaded holes 32 on the inner ring 3 of the bearing, and the sealing ring 2 is securely connected to the end of the inner ring 3 using high-strength screws. The sealing ring 2 also features an inner insertion edge 23, which is precisely inserted into the annular gap between the outer ring 1 and the inner ring 3 of the bearing. Two grooves 24 are respectively formed on the outer side of the insertion edge 23, providing a stable space for the subsequent installation of the sealing ring 5.

[0045] The sealing rings 5 ​​are respectively fitted into the left and right grooves 24 of the insertion edge 23. Several annular support plates 51 are evenly fixed to the outer circumference of each sealing ring 5. The sealing rings 5 ​​are made of elastic, wear-resistant rubber material, forming a highly efficient elastic seal within the gap between the sealing ring 2, the outer ring 1 of the bearing, and the inner ring 3 of the bearing. The support plates 51 provide reliable support for the sealing rings 5 ​​in the radial direction, preventing displacement or deformation of the sealing rings 5 ​​during high-speed rotation or pressure fluctuations. This structure of the sealing rings 5 ​​can adapt to minute changes in the bearing clearance, ensuring multiple sealing effects and further enhancing the bearing's protective capability under complex operating conditions.

[0046] After assembly, during actual operation, the outer ring 1 and inner ring 3 of the slewing bearing form the main load-bearing structure. Rolling elements (such as balls or rollers, not described in the structural description but can be configured according to actual conditions) rotate within this structure, achieving the slewing motion function. The sealing ring 2, together with the second washer 6, the first washer 4, and the sealing ring 5, form multiple sealing barriers, effectively blocking external moisture, dust, oil, and other impurities from the bearing end face to the inner clearance, while simultaneously preventing leakage of internal grease and maintaining long-term efficient bearing operation.

[0047] The structure and sealing principle of this embodiment fully solve the practical technical problems of poor sealing effect, complex assembly and maintenance, and easy damage or difficulty in replacing sealing elements in existing slewing bearings. The overall solution not only achieves multiple sealing protections, but also has the advantages of convenient assembly, simple maintenance and replacement, and stable and reliable structure, making it suitable for slewing machinery under various complex working conditions.

[0048] The working principle of this utility model is as follows:

[0049] In the assembly process of the slewing bearing of this utility model, the second washer 6 is first installed in the grooves 11 at both ends of the outer ring 1 of the bearing. The second rib 61 forms an interlocking support with the groove 11, ensuring that the second washer 6 fits tightly with the outer ring 1 of the bearing. Subsequently, the first washer 4 is fitted into the mounting grooves 31 at both ends of the inner ring 3 of the bearing. The first rib 41 forms a multi-point fit with the mounting groove 31, achieving a stable positioning of the first washer 4.

[0050] Next, align the fixing edge 22 on the outer side of the sealing ring 2 with the threaded holes 32 evenly distributed on the outer side of the bearing inner ring 3, so that the mounting hole 21 of the sealing ring 2 corresponds to the threaded hole 32 one by one. Securely connect the sealing ring 2 to the bearing inner ring 3 with screws to form an end face seal. The inner insertion edge 23 of the sealing ring 2 is inserted into the annular gap between the bearing outer ring 1 and the bearing inner ring 3, and two sleeve grooves 24 are opened on the outer side of the insertion edge 23.

[0051] The sealing rings 5 ​​are respectively fitted into the left and right grooves 24 of the insertion edge 23. The outer circumferential surface of the sealing rings 5 ​​is evenly distributed with annular support plates 51, which provide effective support for the sealing rings 5 ​​in the radial direction, so that they always keep in close contact with the gap between the outer ring 1 and the inner ring 3 of the bearing, enhance the sealing effect, and prevent the sealing rings 5 ​​from shifting or deforming due to rotation or gap changes.

[0052] During the operation of the slewing bearing, the outer ring 1 and inner ring 3 provide reliable support for the rolling elements. The sealing system, consisting of multiple sealing components including the sealing ring 2, the first washer 4, the second washer 6, and the sealing ring 5, works together to achieve multiple layers of sealing protection for the end faces and clearances. The overall structure effectively prevents moisture, dust, and impurities from entering the bearing, while also preventing grease leakage, thereby significantly improving the sealing performance and service life of the slewing bearing and meeting the sealing requirements under complex operating conditions.

[0053] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A slewing bearing with good sealing performance, comprising an outer ring (1) and an inner ring (3), characterized in that: Sealing rings (2) are provided on both the left and right sides of the outer ring (1) of the bearing, and the sealing rings (2) are stuck in the gap between the outer ring (1) and the inner ring (3) of the bearing. The bearing outer ring (1) is equipped with annular second washers (6) on both the left and right sides, and the sealing ring (2) abuts against the second washers (6); The sealing ring (2) is fitted on the outside of the bearing inner ring (3), and the sealing ring (2) is fixed on the bearing inner ring (3) by screws. The first washer (4) is fitted on the outside of the bearing inner ring (3) at the position corresponding to the sealing ring (2). The sealing ring (2) is fitted with two sealing rings (5) on the left and right sides in the gap between the outer ring (1) and the inner ring (3) of the bearing.

2. The rotary bearing with good sealing performance according to claim 1, characterized in that: The outer side of the sealing ring (2) is fixed with a protruding fixing edge (22), and the fixing edge (22) is provided with an installation hole (21). The inner side of the sealing ring (2) is fixed with an insert edge (23) inserted into the gap between the outer ring (1) and the inner ring (3) of the bearing. The outer side of the insert edge (23) is provided with two sleeve grooves (24).

3. A slewing bearing with good sealing performance according to claim 2, characterized in that: The sealing ring (5) is fitted inside the sleeve groove (24), and several annular support pieces (51) are fixed on the outer circumferential surface of the sealing ring (5).

4. A slewing bearing with good sealing performance according to claim 1, characterized in that: The outer circumferential surface of the first washer (4) is provided with several annular first ribs (41), the outer side of the bearing inner ring (3) is provided with an installation groove (31) for installing the first washer (4), and the outer side of the bearing inner ring (3) is also provided with several evenly distributed threaded holes (32).

5. A slewing bearing with good sealing performance according to claim 1, characterized in that: The outer side of the second washer (6) is provided with several annular second ribs (61), and the side of the bearing outer ring (1) is provided with a slot (11) for installing the second washer (6).

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