A floating oil seal

Abstract

This application provides a floating oil seal, relating to the field of oil seal technology. It includes a floating seat with a sealing ring on its inner side. The inner surface of the floating seat and the outer surface of the sealing ring are structurally matched and fitted together. Two sets of elastic sealing elements are provided between the floating seat and the sealing ring. The elastic sealing elements include a first sealing ring and a second sealing ring. A limiting groove is provided on one side of the inner cavity of the floating seat. A limiting block is movably installed in the middle of the inner side of the limiting groove and is fixedly installed on the outer wall of the sealing ring. A first annular groove and a second annular groove are provided on the inner side of the floating seat. The outer end of the first sealing ring is embedded in the first annular groove. The floating oil seal proposed in this utility model has a simple structure and good sealing performance. The first and second sealing rings provide a double sealing effect, and the limiting groove and the limiting block enhance the stability of the seal, thereby ensuring its reliability.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology, specifically a floating oil seal. Background Technology

[0002] Floating seals are a type of dynamic seal, offering good sealing performance in harsh working environments with high levels of coal dust, silt, and moisture. They are compact mechanical seals commonly used in structures such as the head (tail) sprocket assemblies of scraper conveyors, loading mechanisms of tunneling machines, left and right cutting drums and reducers of continuous coal mining machines. A floating oil seal typically consists of a floating oil seal ring and a sealing ring fitted onto the outer circumference of the floating oil seal ring. In floating oil seals, the floating oil seal ring (and sealing ring) are usually used in pairs, with one rotating with the rotating component (e.g., a shaft) and the other relatively stationary. The sealing principle of a floating oil seal is that the deformation of the sealing ring under axial compression generates a clamping force on the two opposing end faces of the floating oil seal ring.

[0003] Common floating oil seals include DO and DF types, where the axial cross-section of the metal floating ring is saddle-shaped, and it is fitted with an O-ring rubber seal. However, this sealing structure is not compact enough in assembly, which greatly affects its sealing reliability. To solve the above problems, we propose a floating oil seal. Utility Model Content

[0004] To address the problems in the background art, this utility model provides a floating oil seal.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A floating oil seal includes a floating seat, a sealing ring disposed on the inner side of the floating seat, the inner side of the floating seat and the outer side of the sealing ring being structurally matched and fitted together; two sets of elastic sealing elements are disposed between the floating seat and the sealing ring, the elastic sealing elements including a first sealing ring and a second sealing ring; a limiting groove is disposed on one side of the inner cavity of the floating seat, a limiting block is movably installed in the middle of the inner side of the limiting groove, and the limiting block is fixedly installed on the outer wall of the sealing ring.

[0007] Preferably, the inner side of the floating seat is provided with a first annular groove and a second annular groove, the outer end of the first sealing ring is embedded in the first annular groove, and the outer end of the second sealing ring is embedded in the second annular groove.

[0008] Preferably, the diameter of the first sealing ring is 1.5 times the diameter of the second sealing ring.

[0009] Preferably, the elastic seal is an O-ring structure and is embedded in the outer wall of the sealing ring.

[0010] Preferably, the sealing ring is made of high-strength alloy into an integral structure with a hardness of HRC58-62 and a surface finish of 0.8 on the sealing surface.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The floating oil seal proposed in this utility model has a simple structure and good sealing performance. The first and second sealing rings provide a double sealing effect, and the limiting groove and the limiting block enhance the stability of the seal, thereby ensuring the reliability of the seal. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Floating seat; 2. Sealing ring; 3. First sealing ring; 4. Second sealing ring; 5. First annular groove; 6. Second annular groove; 7. Limiting groove; 8. Limiting block. Detailed Implementation

[0016] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0017] Example: Refer to Figure 1 - Figure 2 As shown, a floating oil seal of this embodiment includes a floating seat 1, a sealing ring 2 is provided on the inner side of the floating seat 1, the inner side of the floating seat 1 and the outer side of the sealing ring 2 are structurally matched and fitted together; two sets of elastic sealing elements are provided between the floating seat 1 and the sealing ring 2, the elastic sealing elements include a first sealing ring 3 and a second sealing ring 4, the elastic sealing elements are O-shaped sealing rings and are embedded in the outer wall of the sealing ring 2, the inner side of the floating seat 1 is provided with a first annular groove 5 and a second annular groove 6, the outer end of the first sealing ring 3 is embedded in the first annular groove 5, and the outer end of the second sealing ring 4 is embedded in the second annular groove 6.

[0018] In this embodiment, the oil seals need to be used in pairs. One of the two sealing rings 2 is a stationary ring, and the other is a rotating ring. The surfaces of the two sealing rings 2 rotate relative to each other, thus forming a floating seal structure to prevent leakage. The elastic seal acts as an intermediate medium to transmit frictional torque, relying on static friction to drive the sealing ring 2 to rotate with the floating seat 1, while simultaneously preventing the sealing ring 2 from rotating with the shaft. The axial component of the elastic force acting on the outer end face of the sealing ring 2 by the elastic seal acts as an axial load on the sealing surface, ensuring tight contact between the mating sealing surfaces of the two sealing rings 2 and guaranteeing sealing effectiveness. The first sealing ring 3 and the second sealing ring 4 provide a double sealing effect, thereby ensuring the reliability of the seal.

[0019] In some examples, the diameter of the first sealing ring 4 is 1.5 times the diameter of the second sealing ring 3.

[0020] In some examples, a limiting groove 7 is provided on one side of the inner cavity of the floating seat 1, and a limiting block 8 is movably installed in the middle of the inner side of the limiting groove 7. The limiting block 8 is fixedly installed on the outer wall of the sealing ring 2 to play a limiting role.

[0021] In some examples, the sealing ring 2 is made of a high-strength alloy into a one-piece structure with a hardness of HRC58-62, which enhances wear resistance. The surface finish of the sealing surface is 0.8, which improves the smoothness of the sealing ring 2, reduces the friction of the rotating sealing ring 2, and reduces wear.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A floating oil seal characterized by, Includes a floating seat (1), and a sealing ring (2) is provided on the inner side of the floating seat (1). The inner side of the floating seat (1) and the outer side of the sealing ring (2) are structurally matched and fitted together. Two sets of elastic seals are provided between the floating seat (1) and the sealing ring (2). The elastic seals include a first sealing ring (3) and a second sealing ring (4). A limiting groove (7) is provided on one side of the inner cavity of the floating seat (1). A limiting block (8) is movably installed in the middle of the inner side of the limiting groove (7). The limiting block (8) is fixedly installed on the outer wall of the sealing ring (2).

2. A floating oil seal according to claim 1, wherein The floating seat (1) is provided with a first annular groove (5) and a second annular groove (6) on its inner side. The outer end of the first sealing ring (3) is embedded in the first annular groove (5), and the outer end of the second sealing ring (4) is embedded in the second annular groove (6).

3. A floating oil seal as claimed in claim 1, wherein The diameter of the first sealing ring (3) is 1.5 times the diameter of the second sealing ring (4).

4. A floating oil seal as claimed in claim 1, wherein The elastic seal is an O-ring structure and is embedded in the outer wall of the sealing ring (2).

5. A floating oil seal as claimed in claim 1, wherein, The sealing ring (2) is made of high-strength alloy into an integral structure with a hardness of HRC58-62 and a surface finish of 0.8 on the sealing surface.

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