Sealing device for water sealing

Abstract

The utility model provides a sealing device for water sealing, which comprises a sealing shell, a groove is arranged between sealing end faces of the sealing shell, an O-shaped sealing ring is arranged in the groove, and the O-shaped sealing ring is composed of double O-shaped sealing rings formed by connecting two O-shaped sealing rings. The double-O-shaped sealing ring is a double-O-shaped sealing ring with the groove height of 3 mm and the width of 10.8 mm, the double-O-shaped sealing ring is 3.9 mm in height and 7.95 mm in width, and the diameter of the single O-shaped sealing ring is 3.9 mm. The watertight sealing device with the high performance and the low thickness has the advantage of improving the contact surface, and compared with an O-shaped sealing ring, the watertight sealing device with the high performance and the low thickness has the advantages that the contact surface can be improved by 21%, and the sealing reliability is greatly improved. Meanwhile, the depth of the groove is reduced by more than 21% compared with that of a groove sealed by an O-shaped sealing ring of the same type, the thickness of the connecting ring can be reduced, and the weight is greatly reduced.

Description

Technical Field

[0001] This utility model relates to a compartment end face sealing device for water sealing of various types of submarines and underwater gliders. Background Technology

[0002] The hulls of unmanned underwater vehicles (UUVs) and underwater gliders are mostly segmented cylindrical bodies made of high-performance materials such as carbon fiber composites, titanium alloys, or aluminum alloys, assembled with titanium alloy connecting rings in the middle. The inner and outer surfaces of the UUV hull must be smooth, and the internal space is confined, housing batteries, motors, shafting, communication, navigation, positioning, sonar, and other equipment. Currently, UUVs, underwater gliders, and pressure-resistant battery compartments are developing towards deeper underwater diving, lighter weight, and longer endurance, placing higher demands on the watertightness of the hull. The structural form of the hulls of UUVs, underwater gliders, and pressure-resistant battery compartments is a thin-shell structure. Traditional O-ring seals are still mainly used for sealing with titanium alloy connecting rings. Using a single O-ring seal has low reliability; using a double O-ring seal (GB3452.1-2005) increases the length and weight of the titanium alloy connecting rings. In addition, the groove form of the O-ring seal is specified in standard GB3452.1-1988. Its groove depth is relatively deep. In order to ensure the strength and rigidity of the titanium alloy connecting ring, the thickness of the titanium alloy connecting ring will be increased.

[0003] Traditional O-ring seals achieve a seal by changing the contact state through the pressure of the medium itself. They have a simple sealing structure, good sealing performance, and are suitable for applications with alternating pressures. However, their drawbacks are also significant. Due to the large diameter of unmanned underwater vehicles, underwater gliders, and pressure-resistant battery compartments, there are certain tolerances in the manufacturing process of the connecting ring and the compartment. Using a single O-ring seal (see appendix) can address these issues. Figure 1 Under high water pressure, there is a risk of leakage. This can be mitigated by using a double O-ring seal (see attached image). Figure 2 While the O-ring seal offers high reliability through its double O-ring design, the groove length increases by over 270%, and the weight of the titanium alloy connecting ring also increases by approximately 18.7% compared to a single ring. Furthermore, the groove design of the O-ring seal is specified in standard GB3452.1-1988, and its depth is considerable. To ensure the strength and rigidity of the titanium alloy connecting ring, its thickness must be increased. Summary of the Invention

[0004] This invention provides a sealing device with a water seal that has good sealing performance and low thickness.

[0005] The technical solution of this utility model is: a sealing device for water sealing, including a sealing shell, a groove between the sealing end faces of the sealing shell, a sealing device provided in the groove, and the sealing device is a double O-ring structure formed by connecting two O-rings.

[0006] The groove is 3mm high and 10.8mm wide. The double O-ring is 3.9mm high and 7.95mm wide. The diameter of a single O-ring is 3.9mm.

[0007] This invention discloses a high-performance, low-thickness watertight sealing device, which has the advantage of increasing the contact surface area. Compared with a single O-ring seal, it can increase the contact sealing surface by 21%, significantly improving the reliability of the seal. At the same time, its groove is more than 21% shallower than the groove of a similar O-ring seal, which can reduce the thickness of the connecting ring and significantly reduce the weight. Attached Figure Description

[0008] Figure 1 It is an existing O-ring sealing device;

[0009] Figure 2 It is an improved version of the existing O-ring sealing device;

[0010] Figure 3 This utility model relates to a sealing device for water sealing.

[0011] Wherein: 1-Sealed housing; 2-O-ring seal; 3-Groove. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] See Figure 1 The existing underwater vehicle end-face sealing shell 1 has a groove 3 between its end faces, and an O-ring 2 is installed in the groove 3. The groove of the O-ring is 4.2 mm high and 7.1 mm wide, and the diameter of the O-ring 2 is 5.3 mm. It achieves a seal by changing the contact state through the pressure of the medium itself. Its sealing structure is simple, and its sealing performance is good. It is also suitable for situations with alternating pressure. However, its disadvantages are also obvious. Since the diameter of the unmanned underwater vehicle, underwater glider, and pressure-resistant battery compartment is relatively large, there will be certain tolerances in the processing of its connecting ring and compartment. If a single O-ring is used for sealing, there is a risk of water leakage under high water pressure.

[0014] See Figure 2A single O-ring seal may leak under high water pressure. If a double O-ring seal is used, the O-ring 2 consists of two O-rings, with a groove height of 3mm, a width of 10.8mm, and a diameter of 5.3mm. Although the seal has high reliability, the length of the groove increases by more than 270%, and the weight of the titanium alloy connecting ring increases by about 18.7%, which does not meet the weight control requirements of modern deep-water sealing shells.

[0015] See Figure 3 A high-performance, low-thickness watertight sealing device is disclosed. The sealing shell 1 of a submersible has a single-sided sealing surface, with a groove 3 between its end faces. An O-ring 2 is installed within the groove 3. This O-ring is an inverted 8-shape, i.e., a double O-ring formed by two O-rings 2 connected together. The groove of the double O-ring 2 is 3mm high and 10.8mm wide, while the double O-ring is 3.9mm high and 7.95mm wide. The diameter of a single O-ring is 3.9mm. This structure improves the sealing contact surface, increasing the sealing degree by 21% compared to a single O-ring, significantly improving sealing reliability. Simultaneously, its groove depth is reduced by more than 21% compared to a single O-ring seal of the same type, allowing for a thinner connecting ring and a significant weight reduction; meeting the weight control requirements of modern deep-water sealing shells.

Claims

1. A sealing device for water sealing, characterized in that, It includes a sealing housing, and the sealing housing has a groove between its sealing end faces. A sealing device is provided in the groove, and the sealing device is a double O-ring structure formed by connecting two O-rings. The groove is 3 mm high and 10.8 mm wide. The double O-ring is 3.9 mm high and 7.95 mm wide. The diameter of a single O-ring is 3.9 mm.

Images