CN211118115U

CN211118115U - Sealing device, fuel delivery apparatus and aircraft engine

Info

Publication number: CN211118115U
Application number: CN201922050459.3U
Authority: CN
Inventors: 单亚杰; 柳海波
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-07-28
Anticipated expiration: 2029-11-25

Abstract

The utility model relates to a sealing device, fuel conveying equipment and aeroengine, wherein sealing device includes first sealing washer (30) and sealing joint (20), first sealing washer (30) set up inside the pipeline of treating sealing member (10), and first sealing washer (30) and treat and have the clearance between the inner wall of sealing member (10), sealing joint (20) have first sealing (21) and second sealing (22), the inner wall cooperation of first sealing (21) and first sealing washer (30), second sealing (22) and the inner wall cooperation of treating sealing member (10). The fuel delivery apparatus includes a sealing device. An aircraft engine includes a fuel delivery apparatus. The utility model discloses well sealing joint's second sealing and treat that sealed cooperation between the inner wall of sealing member can be rectified through first sealing washer, reduce the oil leak risk that causes by the axiality error, and can adapt to the anomalous sealing member of treating of shell shape, application scope is wider.

Description

Sealing device, fuel delivery apparatus and aircraft engine

Technical Field

The utility model relates to a high-pressure fluid seal technical field especially relates to a sealing device, fuel conveying equipment and aeroengine.

Background

When carrying high-pressure fuel, need effectively seal the junction of pipeline, prevent that pipeline junction from breaking under high-pressure fuel's high pressure impact, causing the pipeline to reveal.

In the related art, a sealing structure as shown in fig. 1 is used to seal a pipe joint. The sealing structure comprises a sealing joint 20a and an outer sleeve 30a, wherein the end part of the sealing joint 20a is inserted into the conveying pipeline 10a, and the outer sleeve 30a is sleeved on the periphery of the conveying pipeline 10a and the sealing joint 20a and is used for pressing the conveying pipeline 10a and the sealing joint 20a to realize sealing. This sealing structure has a problem that it can be used only for the transportation pipe 10a having a regular shape, and if the outer shell of the transportation pipe 10a has a special shape, the outer nut 30a may not fit into the transportation pipe 10a, and the sealing may fail.

In another related art, a sealing structure as shown in fig. 2 is used to seal a pipe joint. This sealing arrangement comprises only the sealing nipple 20b, the mating end of the sealing nipple 20b being fully inserted inside the conveying pipe 10 b. The sealing structure has the problems that the conical surface matching and the thread matching of the sealing joint 20b are coaxial with the conveying pipeline 10b, self-correction cannot be carried out during installation, if the conical surface cannot be in centering fit with the sealing joint 20b under the influence of factors such as lateral force and the like, and the oil leakage problem often occurs in practical use.

Therefore, improvements in the sealing structure are needed.

It is noted that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sealing device, fuel conveying equipment and aeroengine improve sealing performance.

In order to achieve the above object, the present invention provides a sealing device, including:

the first sealing ring is arranged in the pipeline to be sealed, and a gap is formed between the first sealing ring and the inner wall of the pipeline to be sealed; and

and the sealing joint is provided with a first sealing part and a second sealing part, the first sealing part is matched with the inner wall of the first sealing ring, and the second sealing part is matched with the inner wall of the to-be-sealed part.

In some embodiments, the sealing device further comprises a second sealing ring disposed between the first sealing ring and the inner wall of the member to be sealed.

In some embodiments, the outer wall of the first seal ring is provided with a groove, and the second seal ring is mounted in the groove.

In some embodiments, the second seal ring is made of a rubber material.

In some embodiments, the first sealing portion is tapered and the inner wall of the first seal ring includes a tapered mating surface.

In some embodiments, the first seal ring is made of a metal material.

In some embodiments, the gap distance between the first seal ring and the inner wall of the member to be sealed is 0.06mm to 0.1 mm.

In some embodiments, the location of the inner wall of the member to be sealed that engages the second sealing portion is provided with a thread.

In order to achieve the above object, the present invention also provides a fuel conveying device, which comprises a fuel conveying pipeline and the sealing device, wherein the fuel conveying pipeline is a sealing member.

In order to achieve the above object, the utility model also provides an aeroengine, including foretell fuel conveying equipment.

Based on the technical scheme, the utility model discloses a treating that the sealing member is inside to set up first sealing washer, and first sealing washer and treat and have the clearance between the inner wall of sealing member, first sealing washer is movable for treating the sealing member promptly for sealed cooperation between the second sealing of sealing joint and the inner wall of treating the sealing member can be rectified through first sealing washer, reduces the oil leak risk that causes by the axiality error, and can adapt to the anomalous sealing member of treating of shell shape, and application scope is wider.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural view of a sealing structure of the related art.

Fig. 2 is a schematic structural view of another sealing structure of the related art.

Fig. 3 is a schematic structural diagram of an embodiment of the sealing device of the present invention.

Fig. 4 is a schematic structural diagram of a sealing joint according to an embodiment of the sealing device of the present invention.

In the figure:

10a, a conveying pipeline; 20a, sealing the joint; 30a, an outer sleeve;

10b, a conveying pipeline; 20b, sealing the joint;

10. sealing the part to be sealed; 20. sealing the joint; 21. a first seal portion; 22. a second seal portion; 30. a first seal ring; 40. and a second seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.

As shown in fig. 3 and 4, in an embodiment of the sealing device provided by the present invention, the sealing device includes a first sealing ring 30 and a sealing joint 20, the first sealing ring 30 is disposed inside the pipeline of the to-be-sealed member 10, and a gap is formed between the first sealing ring 30 and the inner wall of the to-be-sealed member 10, the sealing joint 20 has a first sealing portion 21 and a second sealing portion 22, the first sealing portion 21 is engaged with the inner wall of the first sealing ring 30, and the second sealing portion 22 is engaged with the inner wall of the to-be-sealed member 10.

In the above embodiment, by providing the first seal ring 30 inside the member to be sealed 10 with a gap between the first seal ring 30 and the inner wall of the member to be sealed 10, i.e., the first seal ring 30 is movable relative to the member to be sealed 10, so that the sealing engagement between the second sealing portion 22 of the sealing joint 20 and the inner wall of the member to be sealed 10 can be corrected by the first seal ring 30, the risk of oil leakage caused by coaxiality errors can be reduced compared to the sealing structure shown in fig. 2; compared with the sealing structure shown in fig. 1, the sealing structure can adapt to the sealing member 10 to be sealed with the irregular shell shape, and has a wide application range.

The sealing arrangement may further comprise a second sealing ring 40, the second sealing ring 40 being arranged between the first sealing ring 30 and the inner wall of the element 10 to be sealed.

By providing the second seal ring 40, the stability of the first seal ring 30 can be ensured, the first seal ring 30 is prevented from moving in the pipeline of the member 10 to be sealed, and the first seal ring 30 can have a certain movable range.

The outer wall of the first sealing ring 30 is provided with a groove, and the second sealing ring 40 is arranged in the groove. The installation mode has simple structure and good reliability; and modification of the seal member 10 to be sealed can be avoided.

The second sealing ring 40 may be made of a flexible material, such as rubber. The rubber has good sealing effect, can deform to a certain degree, and meets the movable effect of the first sealing ring 30.

The compression amount of the second seal ring 40 may be set to 0.12mm to 0.18mm, such as 0.12mm, 0.15mm, 0.18mm, and the like.

The first sealing portion 21 is tapered and the inner wall of the first seal ring 30 includes a tapered mating surface. The first sealing part 21 is matched with the conical matching surface, so that the sealing effect is better.

The first seal ring 30 may be made of a metal material.

The gap distance between the first sealing ring 30 and the inner wall of the member to be sealed 10 may be 0.06mm to 0.1mm, such as 0.06mm, 0.08mm, 0.1mm, and the like.

The inner wall of the member to be sealed 10 is threaded at a position where it engages the second sealing portion 22. By providing the screw thread, the sealing effect can be further enhanced, and the connection reliability of the sealing joint 20 and the member to be sealed 10 can be ensured.

Through the description of a plurality of embodiments of the sealing device, the embodiment of the sealing device solves the sealing problem of the high-pressure fuel pipeline under the condition that the outer sleeve cannot be used due to the irregular shape of the pipeline shell, so that the installation of the sealing joint is not limited to be installed on the periphery of the pipeline; a direct screwing-in type installation mode is adopted, so that the method is simple and convenient; the self-correction can be carried out after the installation, and the sealing performance is ensured; the whole structure and the manufacturing process are simple, the manufacturing difficulty is low, and the application range is wide.

Based on foretell sealing device, the utility model also provides a fuel conveying equipment, this fuel conveying equipment include fuel conveying pipeline and foretell sealing device, and fuel conveying pipeline is promptly for treating sealing member 10. The fuel conveying pipeline is used for conveying high-pressure fuel, and the sealing device can be used for sealing the fuel conveying pipeline and preventing the fuel conveying pipeline from leaking.

Based on foretell fuel conveying equipment, the utility model also provides an aeroengine is used for aeroengine with foretell sealing device or fuel conveying equipment, can avoid revealing of high pressure fuel among the aeroengine, guarantees aeroengine's normal operating.

The positive technical effects of the sealing device in the above embodiments are also applicable to fuel delivery equipment and aircraft engines, and are not described in detail here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the utility model discloses a do not deviate from under the prerequisite of the principle, still can be right the utility model discloses a specific embodiment modifies or carries out the equivalent replacement to some technical features, and these are modified and should be covered with the equivalent replacement in the middle of the technical scheme scope of the utility model.

Claims

1. A seal assembly, comprising:

the first sealing ring (30) is arranged inside the pipeline of the to-be-sealed piece (10) and has a gap with the inner wall of the to-be-sealed piece (10); and

the sealing joint (20) is provided with a first sealing part (21) and a second sealing part (22), the first sealing part (21) is matched with the inner wall of the first sealing ring (30), and the second sealing part (22) is matched with the inner wall of the to-be-sealed piece (10).

2. A sealing arrangement according to claim 1, further comprising a second sealing ring (40), the second sealing ring (40) being arranged between the first sealing ring (30) and the inner wall of the member (10) to be sealed.

3. A sealing arrangement according to claim 2, characterized in that the outer wall of the first sealing ring (30) is provided with a groove, in which groove the second sealing ring (40) is mounted.

4. A sealing arrangement according to claim 2, characterized in that the second sealing ring (40) is made of a rubber material.

5. A sealing arrangement according to claim 1, characterized in that the first sealing portion (21) is conical and the inner wall of the first sealing ring (30) comprises a conical mating surface.

6. A sealing arrangement according to claim 1, characterized in that the first sealing ring (30) is made of a metallic material.

7. A sealing arrangement according to claim 1, characterized in that the clearance distance between the first sealing ring (30) and the inner wall of the element (10) to be sealed is 0.06-0.1 mm.

8. A sealing arrangement according to claim 1, characterized in that the location of the inner wall of the member to be sealed (10) which cooperates with the second sealing portion (22) is provided with a thread.

9. A fuel delivery apparatus, comprising a fuel delivery conduit and a sealing device according to any one of claims 1 to 8, the fuel delivery conduit being the member (10) to be sealed.

10. An aircraft engine comprising a fuel delivery apparatus according to claim 9.