Combined pressure-resistant and wear-resistant polyurethane heavy oil seal assembly

Abstract

The utility model discloses a combined pressure-resistant and wear-resistant polyurethane heavy oil seal assembly which comprises a sealing ring and a butt joint ring which are located on the outer side of a shaft rod, openings of the sealing ring and the butt joint ring are oppositely connected in an inserted mode, an elastic ring embedded with the butt joint ring is arranged in the butt joint ring, and inclined rings which are symmetrically arranged are arranged on the elastic ring. In a default state, the two inclined rings are away from each other and abut against the inner wall of the sealing ring. According to the combined pressure-resistant and wear-resistant polyurethane heavy oil seal assembly, the butt joint ring is inserted into the sealing ring to achieve the effect of increasing the wear-resistant area and the buffer area, the butt joint ring and the sealing ring can keep stable contact and are not prone to slipping off under the condition that the elastic ring is located in the butt joint ring to achieve the supporting function, and the service life of the butt joint ring and the sealing ring is prolonged. The oil seal obtains a buffer pressure-resistant space and an energy absorption effect of the elastic ring, so that the pressure resistance of the oil seal is improved, meanwhile, the butt joint ring towards the outside of a machine body has the function of preventing a framework from being collided by utilizing elastic potential energy of the elastic ring, and the stability and the safety of the oil seal in the using process are improved.

Description

Technical Field

[0001] This utility model relates to the field of oil seal assembly technology, specifically to a combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly. Background Technology

[0002] Oil seals are typically installed between a shaft and the housing of the machine that provides the shaft's movement. Their purpose is to prevent leakage of the lubricating oil used to lubricate the shaft and components. Oil seals are usually made of silicone rubber, polyurethane, polytetrafluoroethylene, or acrylate rubber, and are typically assembled in a closed ring shape.

[0003] According to the publication (announcement) number: CN209688099U, the publication (announcement) date: 2019-11-26, a multi-seal oil seal is disclosed, including an annular rubber gasket consisting of a conical elastic rubber cover, an elastic rubber tube and a portion of an annular groove, and a sealing ring for enhancing the sealing effect is fitted in the groove.

[0004] In the prior art, including the aforementioned patents, some shaft components of the machine body are used for repetitive vibration work, such as the metal head of a breaker or the rod near the breaker. Therefore, the oil seal in this environment will be subjected to radial compressive force or vibration force during use. Since the oil seal is usually responsible for axial sealing, when radial pressure occurs, it is usually accompanied by severe deformation of a certain part of the annular oil seal, which damages the strength of the oil seal itself. The oil seal has weak pressure resistance. At the same time, there may be external splashes of dirt that impact and damage the oil seal, which will aggravate the corrosion of the oil seal. Utility Model Content

[0005] The purpose of this invention is to provide a combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly, which aims to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly includes a shaft, and further includes a sealing ring and a mating ring located outside the shaft and with their openings facing each other. The mating ring is provided with an elastic ring that fits into it, and the elastic ring is provided with symmetrically arranged oblique rings. In the default state, the two oblique rings are far apart from each other and are used to abut against the inner wall of the sealing ring.

[0008] Preferably, the sealing ring is provided with symmetrically arranged outer rings, one of which abuts against the side wall of the shaft.

[0009] Preferably, the docking ring is provided with an inner ring located inside the two outer rings.

[0010] Preferably, the outer side wall of the inner ring is fixedly equipped with retaining rings that are equidistantly arranged and keep in contact with the inner side wall of the outer ring.

[0011] Preferably, the inner wall of the outer ring has an inner groove that engages with the retaining ring.

[0012] Preferably, the elastic ring is provided with an elastic edge that abuts against the inner ring.

[0013] Preferably, the outer outer wall of the outer ring is provided with a protrusion arranged opposite to the inner groove.

[0014] Preferably, the outer ring is a rubber ring made of polyurethane material.

[0015] Preferably, the retaining ring is a hard rubber ring.

[0016] Preferably, the elastic edge is a flexible metal sheet.

[0017] In the above technical solution, the combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly provided by this utility model has the following beneficial effects: by inserting the mating ring into the sealing ring, the wear-resistant area and buffer area are increased. With the elastic ring located in the mating ring to provide support, the mating ring and the sealing ring can maintain stable contact and are not easy to slip off. This allows the oil seal to obtain a buffer pressure-resistant space and the elastic ring to absorb energy, thereby improving the pressure resistance of the oil seal. At the same time, the elastic potential energy of the elastic ring is used to make the mating ring facing out of the machine body have the function of an anti-collision skeleton, improving the stability and safety of the oil seal during use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the oil seal assembly on the outer side of the shaft provided in this embodiment of the utility model;

[0020] Figure 2 This is a side sectional view of the shaft outer side assembly oil seal provided in an embodiment of the present utility model;

[0021] Figure 3 Exploded view of the sealing ring, mating ring, and elastic ring provided in the embodiments of this utility model;

[0022] Figure 4 This is an enlarged schematic diagram of the cross-sectional view of the oil seal mounted on the outer side of the shaft, provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Shaft; 2. Sealing ring; 21. Outer ring; 22. Inner groove; 23. Protrusion; 3. Connecting ring; 31. Inner ring; 32. Snap ring; 4. Elastic ring; 41. Elastic edge; 42. Angled ring. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly includes a shaft 1, and also includes a sealing ring 2 and a mating ring 3 located outside the shaft 1 and with their openings facing each other. The mating ring 3 is provided with an elastic ring 4 that fits into it. The elastic ring 4 is provided with symmetrically arranged oblique rings 42. In the default state, the two oblique rings 42 are far apart from each other and are used to abut against the inner wall of the sealing ring 2.

[0027] Specifically, the shaft 1 is installed in the machine body, which is existing technology and will not be described in detail here. The sealing ring 2 has a U-shaped cross section and is wrapped around the side wall of the shaft 1.

[0028] Furthermore, the semi-circular head of the elastic ring 4 and the semi-circular head of the mating ring 3 are fitted together, and the head of the mating ring 3 and the semi-circular head of the sealing ring 2 are the same size.

[0029] The sealing ring 2 is clamped to the side wall of the shaft 1 for connection and sealing. The mating ring 3 is inserted into the sealing ring 2 to increase the wear-resistant area and buffer area. With the elastic ring 4 located in the mating ring 3 to provide support, the mating ring 3 and the sealing ring 2 can maintain stable contact. At the same time, the inclined ring 42 provides a tight anti-slip limiting function, which makes it difficult for the sealing ring 2 to slip off from the mating ring 3. It also has a bulging cavity, which provides the oil seal with a buffer pressure-resistant space and the elastic ring 4 has an energy absorption effect, thereby improving the pressure resistance of the oil seal. At the same time, the elastic potential energy of the elastic ring 4 is used to make the mating ring 3 facing out of the machine body have the function of an anti-collision skeleton, which improves the stability and safety of the oil seal during use. It also facilitates the disassembly, replacement or maintenance of the oil seal during subsequent pressure application of the elastic ring 4.

[0030] As a further embodiment of this utility model, the sealing ring 2 is provided with symmetrically arranged outer rings 21, one of which abuts against the side wall of the shaft 1.

[0031] The outer ring 21 provides a tight connection between the sealing ring 2 and the shaft 1, while the other outer ring 21 is in contact with the body to ensure the space between the two outer rings 21 is formed.

[0032] As another embodiment further provided in this utility model, the docking ring 3 is provided with an inner ring 31 located inside the two outer rings 21.

[0033] By having two inner rings 31 abutting and fitting between the outer ring 21, the outer side of the cavity has a double-layer sealing contact function, and the sealing position is also strengthened.

[0034] As another embodiment further provided by this utility model, the outer side wall of the inner ring 31 is fixedly installed with retaining rings 32 arranged at equal intervals and in contact with the inner side wall of the outer ring 21.

[0035] The multiple retaining rings 32 function as pleats and bulges, which can form a multi-layer barrier effect between the multiple annular retaining rings 32 and the inner sidewall of the outer ring 21. At the same time, they also enhance the anti-slip ability, making the connection between the sealing ring 2 and the mating ring 3 tighter.

[0036] As another embodiment of this utility model, an inner groove 22 that engages with the retaining ring 32 is provided on the inner sidewall of the outer ring 21.

[0037] Specifically, the inner grooves 22 on the two outer rings 21 are intermittently staggered. Taking the horizontal cross-section as an example, the outer inner groove 22 is located between the two inner inner grooves 22.

[0038] The engagement of the retaining ring 32 and the inner groove 22 further enhances the tightness of the connection between the outer ring 21 and the inner ring 31. At this time, the sealing ring 2 and the mating ring 3 will not separate under the support, and the staggered engagement can improve the barrier sealing effect.

[0039] As another embodiment provided in this utility model, the elastic ring 4 is provided with an elastic edge 41 that abuts against the inner ring 31.

[0040] The elastic edge 41 is used to apply pressure to support the connection between the inner ring 31 and the outer ring 21. When the two elastic edges 41 are pressed, the inner ring 31 and the outer ring 21 are released to adjust the mating position of the retaining ring 32 and the inner groove 22, and to adjust the axial sealing area of ​​the sealing ring 2 and the mating ring 3. After adjustment, a gap is left between the mating ring 3 and the sealing ring 2 to retain dirt, so that dirt that has seeped into the side wall of the shaft 1 can stay in the gap, reducing the possibility of dirt continuing to seep in and interfering with the operation of the parts.

[0041] As another embodiment of this utility model, the outer wall of the outer ring 21 is provided with a protrusion 23 arranged opposite to the inner groove 22.

[0042] After the retaining ring 32 is engaged, force is applied to the outer ring 21, causing radial deformation of the weak position inside the inner groove 22. That is, the outer wall of the outer ring 21 forms a raised protrusion 23. When multiple protrusions 23 come into contact with the side wall of the shaft 1, they have an additional ring-shaped clamping pressure effect, making the connection between the outer ring 21 and the shaft 1 more stable and further improving the anti-slip effect.

[0043] As another embodiment provided in this utility model, the outer ring 21 is specifically a rubber ring made of polyurethane material.

[0044] The rubber ring made of polyurethane makes the sealing ring 2 more wear-resistant and corrosion-resistant during use, giving the sealing ring 2 itself a high strength performance.

[0045] As another embodiment further provided in this utility model, the retaining ring 32 is specifically a hard rubber ring.

[0046] The use of hard rubber material makes the retaining ring 32 more wear-resistant during use and maintains good fit stability when the axial position of the retaining ring 32 is frequently adjusted.

[0047] As another embodiment further provided in this utility model, the elastic edge 41 is specifically an elastic metal sheet.

[0048] The circumferentially arranged elastic edge 41 can stabilize the cavity inside the oil seal and also facilitate the oil seal to perform axial and radial pressure buffering.

[0049] Working principle: The sealing ring 2 is clamped to the side wall of the shaft 1 for connection and sealing. The mating ring 3 is inserted into the sealing ring 2 to increase the wear-resistant area and buffer area. With the elastic ring 4 located in the mating ring 3 to provide support, the mating ring 3 and the sealing ring 2 can maintain stable contact. At the same time, the inclined ring 42 provides a tight anti-slip limit function, which makes it difficult for the sealing ring 2 to slip off from the mating ring 3. It also provides the oil seal with a buffer pressure-resistant space and the elastic ring 4 has an energy absorption effect. The elastic potential energy of the elastic ring 4 is used to make the mating ring 3, which is facing out of the machine body, function as an anti-collision skeleton. During the subsequent pressure application of the elastic ring 4, it is also convenient to disassemble, replace or maintain the oil seal.

[0050] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly, comprising a shaft (1), characterized in that, It also includes a sealing ring (2) and a mating ring (3) located outside the shaft (1) and with their openings facing each other. The mating ring (3) is provided with an elastic ring (4) that fits into it. The elastic ring (4) is provided with symmetrically arranged oblique rings (42). In the default state, the two oblique rings (42) are far apart from each other and are used to abut against the inner wall of the sealing ring (2).

2. The combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 1, characterized in that, The sealing ring (2) is provided with symmetrically arranged outer rings (21), one of which abuts against the side wall of the shaft (1).

3. The combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 2, characterized in that, The docking ring (3) is provided with an inner ring (31) located inside the two outer rings (21).

4. The combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 3, characterized in that, The outer wall of the inner ring (31) is fixedly equipped with retaining rings (32) that are equidistantly arranged and in contact with the inner wall of the outer ring (21).

5. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 4, characterized in that, The inner wall of the outer ring (21) is provided with an inner groove (22) that fits into the retaining ring (32).

6. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 4, characterized in that, The elastic ring (4) is provided with an elastic edge (41) that abuts against the inner ring (31).

7. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 5, characterized in that, The outer ring (21) has a protrusion (23) arranged opposite to the inner groove (22) on its outer side wall.

8. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 5, characterized in that, The outer ring (21) is specifically a rubber ring made of polyurethane material.

9. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 5, characterized in that, The retaining ring (32) is specifically a hard rubber ring.

10. A combined pressure-resistant and wear-resistant polyurethane multi-layer oil seal assembly according to claim 6, characterized in that, The elastic edge (41) is specifically an elastic metal sheet.

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