A new combined sealing ring structure

Abstract

The utility model relates to the technical field of sealing ring, relate to a novel combination sealing ring structure, sealing ring rubber layer vulcanization is covered on metal framework, sealing ring rubber layer is provided with first sealing lip, second sealing lip, third sealing lip, fourth sealing lip and fifth sealing lip in proper order, first sealing lip is located at the outside of sealing ring cover, forms clearance cooperation with sealing ring cover, is used for reducing the entry of mud, sludge, second sealing lip, third sealing lip, fourth sealing lip and fifth sealing lip are located at the inside of sealing ring cover, one end of sealing ring cover and flange plate contact is equipped with the engaging portion, the corresponding position on flange plate is equipped with the clamping slot, the engaging portion and the clamping slot interference fit, realize the axial positioning of sealing ring cover through the interference fit of engaging portion and clamping slot, sealing ring cover rubber layer vulcanization is wrapped at the outside of sealing ring cover, the engaging portion of the end portion of the sealing ring cover of the application is provided with the clamping slot on the flange plate and uses the interference fit, provides the firm axial positioning for entire sealing assembly.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, and in particular to a novel combined sealing ring structure. Background Technology

[0002] In heavy-duty applications such as automotive bearings, construction machinery, and mining equipment, rotary shaft seals are frequently exposed to harsh conditions rich in mud, sand, and dust, posing a significant challenge to seal reliability. Conventional single-lip or double-lip seals have obvious shortcomings: their single or limited lip structure is insufficient to effectively prevent the gradual intrusion of abrasive mud and sand, easily leading to internal grease contamination and premature seal wear; simultaneously, the lip layout of existing composite seals often lacks optimized gradient sealing and dynamic redundancy design, making it difficult to simultaneously meet the dual requirements of efficient external intrusion prevention and internal lubrication maintenance; furthermore, some seals relying on bolt-tightening axial fixing are prone to shifting under equipment vibration, causing uneven lip wear failure; and the outermost lip exposed is often subjected to accelerated wear due to direct impact from mud and water. Although existing technologies employ multi-lip or snap-fit ​​positioning improvements, they still do not systematically solve the comprehensive problems of multi-stage mud and sand interception, low-friction gradient sealing fit, and resistance to axial displacement. Therefore, there is an urgent need to develop a new type of combined sealing ring structure with stronger mud and sand classification and blocking capabilities, optimized interference gradient design, and stable axial positioning function to meet the high requirements for sealing performance and service life under extreme working conditions. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of combined sealing ring structure that can prevent the dust cover from shifting under load, thereby interfering with or jamming the retainer and causing it to fail.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a novel combined sealing ring structure is provided, including: a metal skeleton, a sealing ring rubber layer, a sealing ring cover, a sealing ring cover rubber layer, a first sealing lip, a second sealing lip, a third sealing lip, a fourth sealing lip, and a fifth sealing lip; the sealing ring rubber layer is vulcanized and coated on the metal skeleton; the first sealing lip, the second sealing lip, the third sealing lip, the fourth sealing lip, and the fifth sealing lip are sequentially arranged on the sealing ring rubber layer; the first sealing lip is located on the outside of the sealing ring cover and forms a clearance fit with the sealing ring cover to reduce the entry of mud and sludge; the second sealing lip, the third sealing lip, the fourth sealing lip, and the fifth sealing lip are located on the inside of the sealing ring cover; the end of the sealing ring cover that contacts the flange is provided with a locking part; a groove or protrusion is provided at the corresponding position on the flange; the locking part and the groove are interference-fitted, and the axial positioning of the sealing ring cover is achieved through the interference fit between the locking part and the groove; the locking part abuts against the protrusion to prevent axial displacement of the sealing ring cover; the sealing ring cover rubber layer is vulcanized and wrapped on the outside of the sealing ring cover.

[0005] Furthermore, the second sealing lip does not contact the sealing ring cover, and is used to block the direct impact of external mud, water, and sand, and to allow some of the mud, water, and sand to flow back out.

[0006] Furthermore, the third sealing lip is interference-fitted with the inner surface of the sealing ring cover, with an interference amount of 0.3-0.6mm.

[0007] Furthermore, the fourth sealing lip is interference-fitted with the inner surface of the sealing ring cover, with an interference amount of 0.4-0.8mm.

[0008] Furthermore, the fifth sealing lip is interference-fitted with the inner surface of the sealing ring cover, with an interference amount of 0.1-0.2mm.

[0009] Furthermore, grease is filled between the third and fourth sealing lips, and between the fourth and fifth sealing lips.

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

[0011] (1) This utility model achieves gradient sealing through the synergistic design of five sealing lips. The first sealing lip forms a gap with the sealing ring cover, effectively blocking the initial intrusion of large particles of mud and sludge. The second sealing lip maintains a non-contact gap with the sealing ring cover, using hydrodynamic effects to block and guide some mud and sand to flow back outward, significantly reducing the burden and direct impact on subsequent sealing lips. The third, fourth, and fifth sealing lips on the inner side are tightly fitted to the inner surface of the sealing ring cover with increasing interference fit, forming multiple dynamic sealing barriers, intercepting fine impurities step by step, completely blocking the infiltration path of pollutants, and improving the sealing reliability in harsh environments such as mud, sand, and dust.

[0012] (2) The locking part at the end of the sealing ring cover of this utility model is connected to the groove on the flange by an interference fit. This rigid snap-fit ​​structure provides precise and firm axial positioning for the entire sealing assembly, fundamentally eliminating the risk of axial movement of the sealing ring cover relative to the flange during equipment operation, ensuring the stability of the working position of each sealing lip, and preventing failure due to uneven wear caused by displacement.

[0013] (3) The interference fit of the three inner sealing lips of the sealing ring cover of this utility model adopts a gradient design from strong to weak, which significantly reduces the overall contact pressure and frictional resistance between the sealing lips and the sealing ring cover while ensuring effective sealing. At the same time, the space between the third and fourth lips and the fourth and fifth lips is filled with lubricating grease, which further reduces lip friction, improves lubrication, and assists in sealing. This design effectively avoids local overheating and abnormal wear, and significantly extends the service life of the sealing ring. Attached Figure Description

[0014] Figure 1This is a schematic diagram of a novel combined sealing ring structure according to this utility model;

[0015] Figure 2 This utility model relates to a novel combined sealing ring structure. Figure 1 A partial schematic diagram at point A;

[0016] Figure 3 This is another structural schematic diagram of a novel combined sealing ring structure according to this utility model;

[0017] Figure 4 This utility model relates to a novel combined sealing ring structure. Figure 3 A partial schematic diagram at point B;

[0018] The components in the attached diagram are labeled as follows:

[0019] 1. Metal frame; 2. Rubber layer of sealing ring; 3. Sealing ring cover; 4. Rubber layer of sealing ring cover; 5. First sealing lip; 6. Second sealing lip; 7. Third sealing lip; 8. Fourth sealing lip; 9. Fifth sealing lip; 10. Flange; 11. Engaging part; 12. Slot; 13. Grease; 14. Protrusion. Detailed Implementation

[0020] 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 scope of protection of the present utility model.

[0021] Example:

[0022] This embodiment provides a novel combined sealing ring structure, such as Figure 1 and Figure 2As shown, it includes: a metal frame 1, a sealing ring rubber layer 2, a sealing ring cover 3, a sealing ring cover rubber layer 4, a first sealing lip 5, a second sealing lip 6, a third sealing lip 7, a fourth sealing lip 8, and a fifth sealing lip 9; the sealing ring rubber layer 2 is vulcanized and coated onto the metal frame 1; the metal frame 1 is made of cold-rolled steel sheet and stamped to provide rigid support for the sealing structure; the sealing ring rubber layer 2 is provided with the first sealing lip 5, the second sealing lip 6, the third sealing lip 7, the fourth sealing lip 8, and the fifth sealing lip 9 in sequence, with the height of each sealing lip decreasing to adapt to the gradient sealing requirements; the first sealing lip 5 is located on the outside of the sealing ring cover 3, forming a clearance fit with the sealing ring cover 3 to reduce the entry of mud and sludge and block the entry of large particles of mud and sand; the second sealing lip 6, the third sealing lip 7, the fourth sealing lip 8, and the fifth sealing lip 9 are located on the inside of the sealing ring cover 3; the end of the sealing ring cover 3 that contacts the flange 10 is provided with a locking part 11; as shown Figure 3 and Figure 4 As shown, the flange 10 has a corresponding groove 12 or a protrusion 14. The engaging part 11 is interference-fitted with the groove 12, and the axial positioning of the sealing ring cover 3 is achieved through the interference fit between the engaging part 11 and the groove 12. The engaging part 11 abuts against the protrusion 14 to prevent axial displacement of the sealing ring cover. The engaging part 11 is located at the end of the sealing ring cover 3 and is an outwardly protruding annular step. The flange 10 has an annular groove 12 machined at the corresponding position. The interference fit between the engaging part 11 and the groove 12 is 0.05~0.15mm, which achieves axial locking of the sealing ring cover 3. The sealing ring cover rubber layer 4 is vulcanized and wrapped around the outside of the sealing ring cover 3. The sealing ring cover 3 is a stainless steel annular component, and its outer surface is covered with the sealing ring cover rubber layer 4 through a vulcanization process to enhance corrosion resistance.

[0023] As a further embodiment, the second sealing lip 6 does not contact the sealing ring cover 3, and is used to block the direct impact of external mud, water and sand, and to return some of the mud, water and sand.

[0024] As a further embodiment, the third sealing lip 7 is interference-fitted with the inner surface of the sealing ring cover 3, and the interference amount is 0.3-0.6mm.

[0025] As a further embodiment, the fourth sealing lip 8 is interference-fitted with the inner surface of the sealing ring cover 3, and the interference amount is 0.4-0.8mm.

[0026] As a further embodiment, the fifth sealing lip 9 is interference-fitted with the inner surface of the sealing ring cover 3, and the interference amount is 0.1-0.2mm.

[0027] As a further embodiment, grease 13 is filled between the third sealing lip 7 and the fourth sealing lip 8, and between the fourth sealing lip 8 and the fifth sealing lip 9.

[0028] Assembly process:

[0029] Align the engaging part 11 of the sealing ring cover 3 with the slot 12 of the flange 10, and press the sealing ring in until it is interference-fitted; fit the combined sealing ring, including the metal skeleton 1 and sealing lips 5-9, onto the rotating shaft, so that the first sealing lip 5 faces the external contamination source; adjust the relative position of the flange 10 and the rotating shaft to ensure that the five sealing lips and the sealing ring cover 3 achieve the designed clearance or interference fit.

[0030] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, continuous updates and advancements made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A novel composite sealing ring structure, characterized in that, include: Metal frame (1), sealing ring rubber layer (2), sealing ring cover (3), sealing ring cover rubber layer (4), first sealing lip (5), second sealing lip (6), third sealing lip (7), fourth sealing lip (8) and fifth sealing lip (9); the sealing ring rubber layer (2) is vulcanized and coated on the metal frame (1); the sealing ring rubber layer (2) is provided with the first sealing lip (5), second sealing lip (6), third sealing lip (7), fourth sealing lip (8) and fifth sealing lip (9) in sequence; the first sealing lip (5) is located on the outside of the sealing ring cover (3) and forms a gap fit with the sealing ring cover (3) to reduce the entry of mud and sludge; the second sealing lip (5) is located on the outside of the sealing ring cover (3) and forms a gap fit with the sealing ring cover (3) to reduce the entry of mud and sludge; the second sealing lip (6 ... The sealing lip (6), the third sealing lip (7), the fourth sealing lip (8) and the fifth sealing lip (9) are located on the inner side of the sealing ring cover (3); the end of the sealing ring cover (3) that contacts the flange (10) is provided with a locking part (11); the flange (10) is provided with a groove (12) or a protrusion (14) at the corresponding position; the locking part (11) and the groove (12) are press-fitted together, and the axial positioning of the sealing ring cover (3) is achieved by the press-fitting part (11) and the groove (12); the locking part (11) and the protrusion (14) abut against each other to prevent the axial displacement of the sealing ring cover; the rubber layer (4) of the sealing ring cover is vulcanized and wrapped around the outside of the sealing ring cover (3).

2. The novel combined sealing ring structure according to claim 1, characterized in that: The second sealing lip (6) does not contact the sealing ring cover (3), and is used to block the direct impact of external mud, water and sand, and to return some of the mud, water and sand.

3. The novel combined sealing ring structure according to claim 1, characterized in that: The third sealing lip (7) is interference-fitted with the inner surface of the sealing ring cover (3), and the interference amount is 0.3-0.6mm.

4. The novel combined sealing ring structure according to claim 1, characterized in that: The fourth sealing lip (8) is interference-fitted with the inner surface of the sealing ring cover (3), and the interference amount is 0.4-0.8mm.

5. The novel combined sealing ring structure according to claim 1, characterized in that: The fifth sealing lip (9) is interference-fitted with the inner surface of the sealing ring cover (3), and the interference amount is 0.1-0.2mm.

6. The novel combined sealing ring structure according to claim 1, characterized in that: Grease (13) is filled between the third sealing lip (7) and the fourth sealing lip (8), and between the fourth sealing lip (8) and the fifth sealing lip (9).

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