A seal mechanism for a slide bearing

Abstract

The utility model relates to sliding bearing sealing technical field, concretely relates to a kind of sealing mechanism of assembly type protection sliding bearing, including wheel rocker, sliding bearing, mandrel and composite sealing assembly, the upper end of wheel rocker is provided with counterbore, inner hole is provided in the counterbore, the mandrel is coaxially arranged in the inner hole with sliding bearing, the upper end of sliding bearing is provided with first flange, the upper end of mandrel is provided with second flange, the first flange and second flange axial adhesion correspond, the composite sealing assembly includes primary seal ring and secondary seal ring.The utility model uses the composite sealing assembly of primary seal ring and secondary seal ring, axial misplacement arrangement can form double seal, primary seal ring is embedded with second flange by arc inner groove and realizes first seal, secondary seal ring adopts metal spring energy storage sealing ring and realizes second seal, effectively improve the sealing reliability under high pressure, vibration condition, reduce leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing sealing technology, specifically to an assemblable sealing mechanism for protecting sliding bearings. Background Technology

[0002] As a key component in mechanical transmission systems, the sealing performance of sliding bearings directly affects the operational stability and service life of equipment. In industrial production, sliding bearings are often subjected to complex operating conditions such as high pressure and vibration, and the sealing mechanism must simultaneously achieve functions such as preventing leakage, dust, and impurity intrusion.

[0003] The publication number CN223105069U discloses an assemblable protective sealing mechanism for sliding bearings, including a spindle, a sliding bearing, a sealing ring, and a wheel rocker arm. The sealing ring is assembled with the spindle and the wheel rocker arm, which greatly reduces the production cost compared with the original manufacturing process and simplifies the manufacturing process of the automatic tensioner.

[0004] However, the aforementioned existing technologies rely solely on single-sided contact sealing, which is prone to gap leakage under high pressure and vibration conditions, and lacks redundant protection mechanisms, resulting in insufficient sealing reliability.

[0005] Therefore, an assemblable sealing mechanism for protecting sliding bearings is proposed to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an assemblable sealing mechanism for protecting sliding bearings, which can solve the problems of sealing leakage and low reliability under high-pressure vibration conditions.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an assemblable sealing mechanism for protecting a sliding bearing, comprising a wheel rocker arm, a sliding bearing, a mandrel, and a composite sealing assembly. The upper end of the wheel rocker arm has a countersunk hole, and an inner hole is formed within the countersunk hole. The mandrel and the sliding bearing are coaxially disposed within the inner hole. A first flange is provided at the upper end of the sliding bearing, and a second flange is provided at the upper end of the mandrel. The first flange and the second flange are axially fitted and corresponding. The composite sealing assembly includes a main sealing ring and a secondary sealing ring. The composite sealing assembly is disposed within the inner hole, and a groove is formed within the inner hole. The secondary sealing ring is disposed within the groove. The main sealing ring is adapted to the outer diameter of the second flange. The main sealing ring and the secondary sealing ring are axially offset within the inner hole. A buffer layer is provided between the outer side of the main sealing ring and the inner wall of the inner hole.

[0008] Preferably, the main sealing ring has an arc-shaped inner groove that fits into the outer edge of the second flange, and the sidewall of the main sealing ring has a buffer groove for embedding a buffer layer.

[0009] Preferably, the main sealing ring is made of fluororubber, and the buffer layer is made of elastic polyurethane.

[0010] Preferably, the secondary sealing ring is a metal spring energy storage sealing ring, the inner side of the secondary sealing ring is in contact with the outer wall of the mandrel, and the outer side of the secondary sealing ring abuts against the inner wall of the groove.

[0011] Preferably, a plurality of fastening bolts are provided between the second flange and the first flange, and the second flange is connected to the first flange by the plurality of fastening bolts.

[0012] Preferably, the plurality of fastening bolts are evenly distributed along the circumference of the first flange and the second flange, with a number of not less than four, and the included angle between adjacent fastening bolts is equal.

[0013] Preferably, the inner wall of the arc-shaped inner groove is provided with anti-slip texture, and the depth of the groove is adapted to the thickness of the secondary sealing ring.

[0014] Compared with the prior art, this utility model provides an assemblable sealing mechanism for protecting sliding bearings, which has the following advantages: 1. The composite sealing assembly consisting of a main sealing ring and a secondary sealing ring is arranged in an axially staggered manner to form a double seal. The main sealing ring achieves the first seal by fitting with the second flange through an arc-shaped inner groove, and the secondary sealing ring achieves the second seal by using a metal spring energy storage sealing ring. This effectively improves the sealing reliability under high pressure and vibration conditions and reduces the risk of leakage.

[0015] 2. A buffer layer is set between the outer side of the main sealing ring and the inner sidewall of the hole. This layer can absorb the vibration energy during the movement of the wheel rocker arm, reduce the hard wear between the main sealing ring and the sliding bearing and the wheel rocker arm, and effectively extend the service life of the main sealing ring and the sliding bearing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic cross-sectional view of the composite sealing component in this utility model.

[0017] In the diagram: 1. Wheel rocker arm; 2. Sliding bearing; 3. Mandrel; 4. Countersunk hole; 5. Groove; 6. Inner hole; 7. First flange; 8. Second flange; 9. Main sealing ring; 10. Arc-shaped inner groove; 11. Buffer groove; 12. Fastening bolt; 13. Secondary sealing ring. Detailed Implementation

[0018] 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. Example

[0019] Please see Figure 1 - Figure 4 This embodiment of an assemblable protective sealing mechanism for a sliding bearing includes a wheel rocker arm 1, a sliding bearing 2, a spindle 3, and a composite sealing assembly. The upper end of the wheel rocker arm 1 is provided with a countersunk hole 4, and an inner hole 6 is provided inside the countersunk hole 4. The spindle 3 and the sliding bearing 2 are coaxially disposed in the inner hole 6. A first flange 7 is provided at the upper end of the sliding bearing 2, and a second flange 8 is provided at the upper end of the spindle 3. The first flange 7 and the second flange 8 are axially fitted and corresponding. The composite sealing assembly includes a main sealing ring 9 and a secondary sealing ring 13. The composite sealing assembly is disposed in the inner hole 6, and a groove 5 is provided in the inner hole 6. The secondary sealing ring 13 is disposed in the groove 5. The outer diameter of the main sealing ring 9 is adapted to the outer diameter of the second flange 8. The main sealing ring 9 and the secondary sealing ring 13 are axially offset in the inner hole 6. A buffer layer is provided between the outer side of the main sealing ring 9 and the inner wall of the inner hole 6. The spindle 3 and the sliding bearing 2 are coaxially installed in the inner hole 6. The component positioning is achieved by the axial fit of the first flange 7 and the second flange 8. The composite sealing assembly is deployed in the inner hole 6. The secondary sealing ring 13 is embedded in the dedicated groove 5. The outer diameter of the main sealing ring 9 is matched with that of the second flange 8. At this time, the main sealing ring 9 and the secondary sealing ring 13 are axially misaligned to form two seals. The buffer layer on the outside of the main sealing ring 9 fills the gap between it and the side wall of the inner hole 6, forming an integrated structure of sealing and buffering.

[0020] Among them, the main sealing ring 9 has an arc-shaped inner groove 10, which fits into the outer edge of the second flange 8, and the side wall of the main sealing ring 9 has a buffer groove 11 for embedding a buffer layer. The main sealing ring 9 is precisely fitted with the outer edge of the second flange 8 through the arc-shaped inner groove 10, forming a sealing surface for the contact between the second flange 8 and the main sealing ring 9. The clamping force of its fitting structure can enhance the sealing fit. At the same time, the buffer groove 11 on the side wall of the main sealing ring 9 provides a dedicated installation space for the buffer layer, ensuring that the buffer layer is tightly fitted with the main sealing ring 9 and the side wall of the inner hole 6, and preventing the buffer layer from shifting or falling off.

[0021] Among them, the main sealing ring 9 is made of fluororubber, and the buffer layer is made of elastic polyurethane. By utilizing the high elasticity, wear resistance, high and low temperature resistance, and media corrosion resistance of fluororubber, the integrity of the sealing surface of the main sealing ring 9 is ensured in the contact and vibration environment. The elastic polyurethane material selected for the buffer layer has excellent elastic recovery performance and anti-compression deformation ability, which can absorb the vibration energy generated by the relative movement of the wheel rocker arm 1 and the spindle 3 and convert it into its own elastic deformation, thereby reducing the hard impact on the main sealing ring 9.

[0022] Among them, the secondary sealing ring 13 is a metal spring energy storage sealing ring. The inner side of the secondary sealing ring 13 is in contact with the outer side wall of the spindle 3, and the outer side of the secondary sealing ring 13 abuts against the inner wall of the groove 5. The metal spring energy storage seal ring has a built-in metal spring that can provide continuous pre-tightening force, so that the inner side of the secondary sealing ring 13 is always tightly attached to the outer wall of the mandrel 3, and its outer side is rigidly in contact with the inner wall of the groove 5 to form a second seal. When the main sealing ring 9 has a small leak, the secondary sealing ring 13 can compensate for the gap through the pre-tightening force and block the leakage channel.

[0023] Among them, a plurality of fastening bolts 12 are provided between the second flange 8 and the first flange 7, and the second flange 8 is connected to the first flange 7 by the plurality of fastening bolts 12; The second flange 8 and the first flange 7 are connected by multiple fastening bolts 12. The axial preload of the multiple fastening bolts 12 makes the second flange 8 and the first flange 7 fit tightly together, eliminating the gap between the mating surfaces.

[0024] Among them, multiple fastening bolts 12 are evenly distributed along the circumference of the first flange 7 and the second flange 8, with a number of no less than 4, and the included angle between adjacent fastening bolts 12 is equal. The equal included angle of adjacent fastening bolts 12 ensures that the preload on the mating surfaces of the first flange 7 and the second flange 8 is evenly distributed, avoiding deformation of the first flange 7 and the second flange 8 caused by local stress concentration, and ensuring that the first flange 7 and the second flange 8 are in parallel fit without warping gaps.

[0025] The inner wall of the arc-shaped inner groove 10 is provided with anti-slip texture, and the depth of the groove 5 is adapted to the thickness of the secondary sealing ring 13. The anti-slip texture in the arc-shaped inner groove 10 can enhance the stability of the second flange 8 fitting in the main sealing ring 9 and prevent relative sliding. At the same time, the depth of the groove 5 is matched with the thickness of the secondary sealing ring 13 to ensure that the secondary sealing ring 13 is flush with the inner wall of the inner hole 6 after installation, without affecting the assembly and sealing effect of the main sealing ring 9.

[0026] The working principle of the above embodiment is as follows: In use, the sliding bearing 2 and the spindle 3 are coaxially installed into the inner hole 6 of the wheel rocker arm 1, so that the first flange 7 and the second flange 8 are axially fitted. The connection between the two is ensured by fastening bolts 12. Then, the elastic polyurethane buffer layer is embedded in the buffer groove 11 of the main sealing ring 9, and the main sealing ring 9 is sleeved on the outside of the second flange 8, so that the arc-shaped inner groove 10 fits with the edge of the second flange 8, completing the first sealing assembly. Finally, the secondary sealing ring 13 is embedded in the groove 5 of the inner hole 6, so that it fits tightly with the outer side of the spindle 3 and the inner sidewall of the secondary sealing ring 13 to form the second seal, which effectively improves the sealing reliability under high pressure and vibration conditions and reduces the risk of leakage.

[0027] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism for assemblable protection of sliding bearings, characterized in that: The assembly includes a rocker arm (1), a sliding bearing (2), a spindle (3), and a composite sealing assembly. The upper end of the rocker arm (1) is provided with a countersunk hole (4), and an inner hole (6) is provided inside the countersunk hole (4). The spindle (3) and the sliding bearing (2) are coaxially arranged in the inner hole (6). The upper end of the sliding bearing (2) is provided with a first flange (7), and the upper end of the spindle (3) is provided with a second flange (8). The first flange (7) and the second flange (8) are axially fitted and corresponding. The composite sealing assembly includes a main sealing ring (9) and a secondary sealing ring (13). The composite sealing assembly is disposed in the inner hole (6). A groove (5) is provided in the inner hole (6). The secondary sealing ring (13) is disposed in the groove (5). The main sealing ring (9) is adapted to the outer diameter of the second flange (8). The main sealing ring (9) and the secondary sealing ring (13) are axially misaligned in the inner hole (6). A buffer layer is provided on the outer side of the main sealing ring (9) and the inner wall of the inner hole (6).

2. The sealing mechanism for an assemblable protective sliding bearing according to claim 1, characterized in that: The main sealing ring (9) has an arc-shaped inner groove (10) inside, which fits into the outer edge of the second flange (8). The side wall of the main sealing ring (9) has a buffer groove (11) for embedding a buffer layer.

3. The sealing mechanism for an assemblable protective sliding bearing according to claim 2, characterized in that: The main sealing ring (9) is made of fluororubber, and the buffer layer is made of elastic polyurethane.

4. The sealing mechanism for an assemblable protective sliding bearing according to claim 1, characterized in that: The secondary sealing ring (13) is a metal spring energy storage sealing ring. The inner side of the secondary sealing ring (13) is in contact with the outer side wall of the spindle (3), and the outer side of the secondary sealing ring (13) abuts against the inner wall of the groove (5).

5. The sealing mechanism for an assemblable protective sliding bearing according to claim 1, characterized in that: A plurality of fastening bolts (12) are provided between the second flange (8) and the first flange (7), and the second flange (8) is connected to the first flange (7) by the plurality of fastening bolts (12).

6. The sealing mechanism for an assemblable protective sliding bearing according to claim 5, characterized in that: Multiple fastening bolts (12) are evenly distributed along the circumference of the first flange (7) and the second flange (8), with a number of no less than 4, and the included angle between adjacent fastening bolts (12) is equal.

7. The sealing mechanism for an assemblable protective sliding bearing according to claim 2, characterized in that: The inner wall of the arc-shaped inner groove (10) is provided with anti-slip texture, and the depth of the groove (5) is adapted to the thickness of the secondary sealing ring (13).

Images