Cold-extruded sealing seat ring

Abstract

The utility model discloses a cold extrusion sealing seat ring which comprises a base, a sealing structure and a nut, the sealing structure comprises a sealing ring, a sealing washer and a sealing cap, the sealing seat ring is connected with a structural plate through one end of the base, the sealing ring and the sealing washer are arranged between the base and the nut, the sealing ring is close to the end of the base, the sealing washer is of a convex structure, and the sealing cap is arranged on the base. A flange of the sealing washer presses the sealing ring, the large-diameter end of the sealing washer is close to the nut, a sealing cap is arranged on the outer side of the nut, the sealing cap, the sealing washer and the sealing ring playing a direct sealing role form a sealing structure, and the sealing cap has a nut limiting function. After the cold extrusion base is installed, a certain fatigue gain effect is achieved on a structural part fastener connecting hole; the extrusion connection part is equivalent to a bushing, and can play a role in protecting the structural hole; and compared with a traditional riveting sealing carriage nut, rivet installation operation does not need to be carried out, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the field of aviation sealing systems, in particular to a cold-extruded sealing seat ring. Background Art

[0002] Currently, sealing lug nuts used in the aviation field are typically riveted lug nuts, connected to the structure via rivets. The dense rivet holes can have a certain impact on the fatigue life of the aircraft structure. Therefore, this connection method is no longer in line with the trend of long aircraft life. Cold extrusion strengthening technology is relatively advanced and is widely used in the aviation field. Cold extrusion strengthening technology can effectively improve the fatigue life of structural joints and extend the service life of aircraft. Therefore, combined with cold extrusion strengthening technology, a sealing seat ring for cold extrusion is proposed. Utility Model Content

[0003] The utility model aims to provide a certain fatigue gain effect while achieving the sealing of the bolt fastener.

[0004] The technical solution of the utility model is: a cold-extruded sealing seat ring, comprising: a base, a sealing ring, a sealing gasket, a nut and a sealing cap. One end of the base connects the sealing seat ring with the structural plate to provide a connection part for the upper sealing structure, while providing fatigue gain for the structural plate, and can also seal the contact part between the base and the structural plate. The other end of the base is connected to the nut to achieve connection with the external bolt. A sealing ring and a sealing gasket are provided between the base and the nut. The sealing ring is close to the base end, and the sealing gasket is a convex structure. The sealing gasket flange presses the sealing ring, and the large diameter end of the sealing gasket is close to the nut. A sealing cap is provided on the outside of the nut. The sealing cap, the sealing gasket and the sealing ring that plays a direct sealing role constitute a sealing structure, and the sealing cap has the function of limiting the nut.

[0005] Furthermore, the inner side of the sealing cap is provided with two symmetrically arranged inner concave bosses which are clamped on the boss of the base, and can limit the displacement of the nut during the bolt connection process.

[0006] Furthermore, the inner side of the sealing cap is in sealing contact with the outer side of the sealing ring.

[0007] Beneficial effects of the utility model:

[0008] The cold-extruded sealing seat ring can automatically seal after the bolts are connected; after the cold-extruded base is installed, it has a certain fatigue gain effect on the connection holes of the structural fasteners; its extruded connection part is equivalent to a bushing, which can protect the structural holes; it can realize the rapid replacement of internally damaged nuts. Compared with traditional riveted sealing drag plate nuts, there is no need for rivet installation operations, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0010] Figure 1 This is a schematic diagram of the cold-extruded sealing seat ring structure provided by the utility model;

[0011] In the attached figure:

[0012] 1-base, 11-boss

[0013] 2-sealing structure, 21-sealing ring, 22-sealing gasket, 23-sealing cap, 231-inner concave and convex platform

[0014] 3-Nut. DETAILED DESCRIPTION

[0015] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0016] See also Figure 1 The figure shows a schematic diagram of the cold-extruded sealing seat ring structure provided by the utility model, including a base 1, a sealing structure 2 and a nut 3. The sealing structure 2 includes a sealing ring 21, a sealing gasket 22, and a sealing cap 23. The base 1 is a stepped structure, the narrowest end is connected to the structural plate, and the other end is connected to the nut 3. A sealing ring 21 and a sealing gasket 22 are provided between the base 1 and the nut 3. The sealing ring 21 is close to the end of the base 1, and the sealing gasket 22 is a convex structure. The flange of the sealing gasket 22 presses the sealing ring 21, and the large diameter end is close to the nut 3. A sealing cap 23 is provided on the outside of the nut 3; one end of the base 1 connects the sealing seat ring with the structural plate, providing a connection part for the upper sealing structure 2, while providing fatigue gain for the structural plate, and can also seal the contact part between the base 1 and the structural plate. The other end of the base 1 is connected to the nut 3 to realize the connection with the external bolt. The inner side of the sealing cap 23 is provided with two symmetrically arranged inner concave bosses 231 which are clamped and connected with the boss 11 of the base 1. The inner side of the sealing cap 23 is in sealing contact with the outer side of the sealing ring 21, and the sealing cap 23 has the function of limiting the nut.

[0017] The base 1 is first connected to the structural plate through a special extrusion tool. After the connection, the extrusion is sealed. The nut 3 and the sealing structure 2 are connected to the base 1 together. During the bolt installation process, the nut 3 transmits the torque generated by the bolt installation to the base 1 through the sealing structure 2. After the bolt installation is completed, the sealing structure 2 seals the nut 3.

[0018] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. Any modification or equivalent substitution of the technical solution of the present invention made by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A cold extruded sealing seat ring, characterized in that: The invention comprises a base (1), a sealing structure (2) and a nut (3), wherein the sealing structure (2) comprises a sealing ring (21), a sealing gasket (22) and a sealing cap (23), wherein the base (1) is in a stepped structure, wherein the narrowest end is connected to the structural plate and the other end is connected to the nut (3), wherein a sealing ring (21) and a sealing gasket (22) are provided between the base (1) and the nut (3), wherein the sealing ring (21) is close to the end of the base (1), and the sealing gasket (22) is in a convex structure, wherein the flange of the sealing gasket (22) presses the sealing ring (21), and the large diameter end is close to the nut (3), and a sealing cap (23) is provided on the outside of the nut (3).

2. The cold-extruded sealing seat ring according to claim 1, characterized in that: The inner side of the sealing cap (23) is provided with two symmetrically arranged inner concave bosses (231) which are clamped and connected to the boss (11) of the base (1).

3. The cold-extruded sealing seat ring according to claim 1, characterized in that: The inner side of the sealing cap (23) is in sealing contact with the outer side of the sealing ring (21).

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