High-speed rotating sealing structure

Abstract

The utility model provides a high-speed rotating sealing structure which comprises a plastic body, a metal supporting piece is installed in the plastic body, a dustproof lip is arranged on one side of the lower end of the plastic body, a main sealing lip is arranged on the other side of the lower end of the plastic body, the dustproof lip is arranged on the outer side of the main sealing lip, and a spring installation cavity is formed in the plastic body. A spring installation groove I and a spring installation groove II are formed in the lower side of the spring installation cavity, a spring piece I is installed in the spring installation groove I, and a spring piece II is installed in the spring installation groove II. In order to enlarge the contact area and facilitate heat dissipation, the springs are connected in series, the first spring provides main pre-tightening force, the second spring provides compensation force, and under the combined action of the main pre-tightening force and the compensation force, the lip rotates in a journal-sticking mode and is effectively attached to the surface of a shaft, and heat dissipation is facilitated. And the top is an oil storage tank which is contacted with the bottom of the groove to lubricate.

Description

Technical Field

[0001] This utility model relates to the field of aviation sealing technology, specifically a high-speed rotating sealing structure. Background Technology

[0002] Aerospace seals face the challenge of long-term, high-speed service. Premature seal failure due to lip overheating is a serious problem, making it difficult to meet the high reliability and long-cycle service requirements of aerospace seals. Therefore, we have improved the existing sealing structure by proposing a high-speed rotating sealing structure, which can significantly reduce lip temperature rise and improve sealing safety and reliability. Summary of the Invention

[0003] The technical problem solved by this utility model is to provide a high-speed rotating sealing structure to solve the problems mentioned in the background art.

[0004] The technical problem solved by this utility model is achieved by the following technical solution: a high-speed rotating sealing structure, comprising: a plastic body, a metal support installed inside the plastic body, a dustproof lip on one side of the lower end of the plastic body and a main sealing lip on the other side, the dustproof lip being disposed outside the main sealing lip, a spring mounting cavity inside the plastic body, a spring mounting groove I and a spring mounting groove II on the lower side of the spring mounting cavity, a spring component I installed in the spring mounting groove I and a spring component II installed in the spring mounting groove II, the spring component I providing the main preload force and the spring component II providing the compensation force, the two working together to achieve the lip gripping the shaft rotation, effectively fitting the shaft surface, which is beneficial for heat dissipation.

[0005] Furthermore, the top of the plastic body is provided with an oil reservoir, which is filled with a layer of silicone-based grease.

[0006] Furthermore, the main sealing lip adopts an arc-shaped cross-section to increase the contact area and facilitate heat dissipation.

[0007] Furthermore, the dustproof lip is provided with a dustproof lip opening, and the main sealing lip is provided with a main sealing lip opening.

[0008] Furthermore, the plastic body has a C-shaped structure, and the metal support is embedded in the plastic body, the metal support also having a C-shaped structure.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the opening design on the dustproof lip and the main sealing lip of this utility model improves the heat dissipation efficiency of the lip part, reduces the lip wear rate, and can effectively meet the high speed requirements of aviation seals. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0012] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection between the internal parts of two components. Example

[0013] like Figure 1 , Figure 2 As shown, a high-speed rotary sealing structure includes: a plastic body 1, a metal support 2 installed inside the plastic body 1, a dustproof lip 17 on one side of the lower end of the plastic body 1 and a main sealing lip 15 on the other side, the dustproof lip 17 being disposed outside the main sealing lip 15, a spring mounting cavity inside the plastic body 1, a spring mounting groove I12 and a spring mounting groove II13 on the lower side of the spring mounting cavity, a spring component I3 installed in the spring mounting groove I12 and a spring component II4 installed in the spring mounting groove II13, the spring component I3 providing the main preload force and the spring component II4 providing the compensation force, the two working together to achieve the lip gripping the shaft rotation, effectively fitting the shaft surface, which is beneficial for heat dissipation. Example

[0014] like Figure 1 , Figure 2 As shown, a high-speed rotary sealing structure includes: a plastic body 1, a metal support 2 installed inside the plastic body 1, a dustproof lip 17 on one side of the lower end of the plastic body 1 and a main sealing lip 15 on the other side, the dustproof lip 17 being disposed outside the main sealing lip 15, a spring mounting cavity inside the plastic body 1, a spring mounting groove I12 and a spring mounting groove II13 on the lower side of the spring mounting cavity, a spring component I3 installed in the spring mounting groove I12 and a spring component II4 installed in the spring mounting groove II13, and an oil reservoir 11 at the top of the plastic body 1, the oil reservoir 11 being filled with a silicone-based grease layer. Example

[0015] like Figure 1 , Figure 2As shown, a high-speed rotary sealing structure includes: a plastic body 1, a metal support 2 installed inside the plastic body 1, a dustproof lip 17 on one side of the lower end of the plastic body 1 and a main sealing lip 15 on the other side, the dustproof lip 17 being disposed outside the main sealing lip 15, a spring mounting cavity inside the plastic body 1, a spring mounting groove I12 and a spring mounting groove II13 on the lower side of the spring mounting cavity, a spring component I3 installed in the spring mounting groove I12 and a spring component II4 installed in the spring mounting groove II13, and the main sealing lip 15 having an arc-shaped cross-section to increase the contact area and facilitate heat dissipation. Example

[0016] like Figure 1 , Figure 2 As shown, a high-speed rotary sealing structure includes: a plastic body 1, a metal support 2 installed inside the plastic body 1, a dustproof lip 17 on one side of the lower end of the plastic body 1 and a main sealing lip 15 on the other side, the dustproof lip 17 being disposed outside the main sealing lip 15, a spring mounting cavity inside the plastic body 1, a spring mounting groove I12 and a spring mounting groove II13 on the lower side of the spring mounting cavity, a spring component I3 installed in the spring mounting groove I12 and a spring component II4 installed in the spring mounting groove II13, a dustproof lip opening 16 on the dustproof lip 17, and a main sealing lip opening 14 on the main sealing lip 15. Example

[0017] like Figure 1 , Figure 2 As shown, a high-speed rotary sealing structure includes: a plastic body 1, a metal support 2 installed inside the plastic body 1, a dustproof lip 17 on one side of the lower end of the plastic body 1 and a main sealing lip 15 on the other side, the dustproof lip 17 being disposed outside the main sealing lip 15, a spring mounting cavity inside the plastic body 1, a spring mounting groove I12 and a spring mounting groove II13 on the lower side of the spring mounting cavity, a spring component I3 installed in the spring mounting groove I12 and a spring component II4 installed in the spring mounting groove II13, the plastic body 1 having a C-shaped structure, and the metal support 2 being embedded inside the plastic body 1, the metal support 2 having a C-shaped structure.

[0018] The assembly method of this utility model is as follows: 1. The oil seal is fitted into the rotating shaft and pressed into the support cylinder by hydraulic tools to ensure that the main sealing lip fits against the shaft surface; 2. The reciprocating cycle is simulated in a high and low temperature chamber of -50~+120℃ to detect the leakage and friction coefficient. The results show that the leakage rate is stable at 0.05mL / h and the friction coefficient is ≤0.08; 3. Compared with the traditional nitrile rubber oil seal, this structure has a 3-fold longer service life under the same load and no lubrication failure phenomenon.

[0019] This invention solves the problems of poor wear resistance and short lifespan of traditional seals by optimizing the seal structure. The seal features self-lubrication, high strength, and long lifespan, making it suitable for extreme aerospace environments.

[0020] The system features a two-tiered structure consisting of a main sealing lip and a dustproof lip. The main lip has an arc-shaped cross-section that dynamically fits the rotating shaft; the secondary lip has a stepped design that compensates for wear gaps through elastic pre-tightening force; and the dustproof lip prevents external impurities from entering.

[0021] A miniature oil reservoir is machined on the top of the seal and filled with silicone-based grease to achieve continuous lubrication and reduce frictional heat buildup. A lightweight titanium alloy skeleton is used to enhance structural stability and reduce weight.

[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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-speed rotating sealing structure, comprising: The plastic body (1) is characterized in that: a metal support (2) is installed inside the plastic body (1), a dustproof lip (17) is provided on one side of the lower end of the plastic body (1) and a main sealing lip (15) is provided on the other side, the dustproof lip (17) is located outside the main sealing lip (15), a spring mounting cavity is provided inside the plastic body (1), a spring mounting groove I (12) and a spring mounting groove II (13) are provided on the lower side of the spring mounting cavity, a spring component I (3) is installed in the spring mounting groove I (12) and a spring component II (4) is installed in the spring mounting groove II (13).

2. The high-speed rotating sealing structure according to claim 1, characterized in that: The top of the plastic body (1) is provided with an oil reservoir (11), which is filled with a silicone-based grease layer.

3. The high-speed rotating sealing structure according to claim 1, characterized in that: The main sealing lip (15) has an arc-shaped cross section.

4. The high-speed rotating sealing structure according to claim 1, characterized in that: The dustproof lip (17) is provided with a dustproof lip opening (16), and the main sealing lip (15) is provided with a main sealing lip opening (14).

5. The high-speed rotating sealing structure according to claim 1, characterized in that: The plastic body (1) has a C-shaped structure, and the metal support (2) is embedded in the plastic body (1). The metal support (2) also has a C-shaped structure.

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