CN114526162A - A kind of air inlet sealing device - Google Patents

Abstract

The application provides an air inlet sealing device, which belongs to the technical field of aircraft structures, and specifically includes an adapter ring, a collar and a plurality of abutting parts. One end face of the adapter ring is provided with a first flange, One end face is provided with a first sealing ring, the sleeve ring is sleeved on the adapter ring with the end face of the first sealing ring facing away from the first flange, and the outer side wall of the adapter ring is also provided with a protruding limiter The limiting piece is arranged between the collar and the first flange. When the collar abuts the limiting piece, the first sealing ring does not protrude from the end face of the adapter ring, and a plurality of abutting pieces surround the outer circumference of the adapter ring. A plurality of abutting pieces are inserted between the limiting piece and the collar, so that the collar moves to the side away from the first flange to the end face of the first sealing ring protruding from the adapter ring. Through the processing solution of the present application, the problem of the sealing of the air intake port installed by the side entry of the engine in the prior art is solved.

Description

A kind of air inlet sealing device

technical field

The present application relates to the field of aircraft structures, and in particular, to an air intake sealing device.

Background technique

With the demand for advanced combat functions of modern military aircraft, aircraft engine intake and exhaust systems that meet stealth requirements have begun to emerge in large numbers on advanced stealth aircraft. The more typical design is similar to the air intake and tail nozzle of the B-2 stealth strategic bomber. They all adopt the S-curve shape with low radar cross-sectional area, and the engine is buried in the fuselage. Therefore, the engine cannot be installed through the push-in (drilling) type that enters from the rear of the aircraft, but can only be installed from the belly or the back of the aircraft. Side entry mount with mouth frame entry. In order to avoid the interference and jamming of the engine and the intake port during the side entry installation process, a gap should be reserved between the engine intake port flange and the intake port butt flange, so the sealing between the two can only be carried out after the engine is installed in place. . Due to the small space in the engine compartment, the traditional sealing method of pressing the sealing ring into the gap is inoperable, and the sealing ring is difficult to fix, and there is a risk of being sucked into the air intake. Based on the above constraints, the traditional air inlet sealing device can no longer meet the above specific requirements. Corresponding technologies need to be used to solve the problem of reliable air inlet sealing during side-entry installation of the engine.

SUMMARY OF THE INVENTION

In view of this, the present application provides an intake port sealing device, which solves the problem of the intake port sealing of the side-entry installation of the engine in the prior art.

A kind of air inlet sealing device provided by this application adopts the following technical scheme:

An air inlet sealing device comprises an adapter ring, a collar and a plurality of abutting parts, one end surface of the adapter ring is provided with a first flange, and one end surface of the collar is provided with a first seal The sleeve ring is sleeved on the adapter ring with the end face of the first sealing ring facing away from the first flange, and the outer side wall of the adapter ring is also provided with a protruding A limiter, the limiter is arranged between the collar and the first flange, and when the collar abuts the limiter, the first sealing ring does not protrude from the edge of the adapter ring On the end face, a plurality of the abutting pieces surround the outer circumference of the adapter ring, and a plurality of the abutting pieces are inserted between the limiting piece and the collar to make the collar move away from the first flange One side of the first sealing ring is moved to the end face of the first sealing ring protruding from the adapter ring.

Optionally, the abutting member is an arc-shaped wedge ring, the thickness of the wedge-shaped wedge ring gradually decreases from the outside to the inside, and the arc-shaped wedge ring abuts one side of the limiting member and the limiting member. Pieces fit.

Optionally, the number of the arc-shaped wedge rings is two, and the inner diameter of each arc-shaped wedge ring is the same and the circumference is half a circle.

Optionally, the side surface of the collar facing the first flange is set as an inclined surface that matches and fits with the arc-shaped wedge ring.

Optionally, after the abutting member is inserted between the collar and the limiting member, the abutting member and the limiting member are fixedly connected by a locking screw.

Optionally, the limiting member is a second flange fixed on the outer periphery of the adapter ring, and the locking screw passes through the second flange to fix the abutting member.

Optionally, an annular groove is provided on the end surface of the collar away from the first flange, and the first sealing ring is fixed in the annular groove and protrudes from the annular groove.

Optionally, the first sealing ring is made of sponge rubber sheet material.

Optionally, the inner wall of the collar is provided with an annular groove, the annular groove is provided with a second sealing ring, the collar is sleeved on the adapter, and the second sealing ring is connected to the adapter. The inner wall of the adapter ring is sealed and fitted.

Optionally, the first flange is used to be fixedly connected with the engine air inlet flange by bolts, and the end face of the adapter ring away from the first flange after installation exists on the first face of the air inlet flange. gap.

To sum up, the present application includes the following beneficial technical effects:

1. After connecting the first flange of the adapter ring with the engine inlet flange, there is a gap between the first sealing ring and the flange surface of the intake port. The first sealing ring is in an uncompressed state and enters the engine side. During the installation process, a gap is reserved between the intake port and the sealing device, which is convenient for the adjustment of the installation posture of the engine. After the engine is installed in place, a plurality of abutting pieces are inserted and fixed between the limiting piece and the collar in a distributed manner around the adapter ring, and the insertion of the abutting pieces pushes the collar away from the first ring. One side of the flange is moved, that is, the collar is moved to the side of the intake port flange, and the first sealing ring is extruded onto the flange surface of the intake port to complete the end face between the sealing device and the intake port. The seal can solve the technical problem of the air inlet sealing of the engine side-entry installation. The structure is simple and reliable, and it is easy to disassemble and assemble in the engine compartment with a small space. It can be widely used in the air inlet sealing of the aircraft engine side-entry installation;

2. The first sealing ring of the present application is bonded in the groove of the collar and keeps a certain distance from the inner surface of the air inlet, and the front extension of the adapter ring also separates the first sealing ring from the inner flow channel of the air inlet It can prevent the convex part from entering the inner pipe of the intake port when the first sealing ring is pressurized, thereby ensuring that the inner flow channel wall surface of the interface between the intake port and the engine is relatively smooth without protrusions, which is beneficial to reduce the loss of intake flow.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the explosion structure schematic diagram of the sealing energy device, air inlet and engine air inlet of the application;

2 is a cross-sectional view of the application in a direction perpendicular to the first flange surface;

Fig. 3 is the enlarged schematic diagram of part A in Fig. 1;

FIG. 4 is an enlarged schematic view of part B in FIG. 1 .

Description of reference numerals: 1. Inlet port flange; 2. First sealing ring; 21. Annular groove; 3. Second sealing ring; 31. Annular groove; 4. Sleeve ring; ; 6. Adapter ring; 61. First flange; 62. Limiting piece; 7. Engine inlet flange; 8. Bolt; 9. Locking screw; 91. Threaded blind hole.

Detailed ways

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The embodiments of the present application are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. The present application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

To illustrate, various aspects of embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is illustrative only. Based on this application, one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method may be practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic way, and the drawings only show the components related to the present application rather than the number, shape and the number of components in actual implementation. For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and the component layout may also be more complicated.

Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will understand that the described aspects may be practiced without these specific details.

The embodiments of the present application provide an air inlet sealing device. Air inlet seal for side entry installation of aircraft engines, the sealing device is installed between the engine air inlet flange and the air inlet flange.

As shown in FIGS. 1 , 2 and 3 , an air inlet sealing device includes an adapter ring 6 , a collar 4 and a plurality of abutting parts. One end face of the adapter ring 6 is provided with a first flange 61, and the first flange 61 is used to be fixedly connected with the engine air inlet flange 7 through bolts 8, and the adapter ring 6 after installation is away from There is a gap between the end face of the first flange 61 and the face of the intake port flange 1 to avoid interference between the adapter ring 6 and the intake port when the aircraft engine is axially displaced due to thermal expansion.

One end surface of the collar 4 is provided with a first sealing ring 2 , and the collar 4 is sleeved on the On the adapter ring 6, the outer side wall of the adapter ring 6 is also provided with a protruding limiter 62, and the limiter 62 is arranged between the collar 4 and the first flange 61. When the collar 4 abuts against the limiting member 62 , the first sealing ring 2 does not protrude from the end surface of the adapter ring 6 , and a plurality of the abutting members surround the outer circumference of the adapter ring 6 . The abutting member is inserted between the limiting member 62 and the collar 4, so that the collar 4 moves to the side away from the first flange 61 until the first sealing ring 2 protrudes from the rotation. The end face of the ring 6.

Sleeve the collar 4 on the adapter ring 6, the end of the collar 4 facing away from the first sealing ring 2 abuts against the limiting member 62, at this time the first sealing ring 2 does not protrude from the end face of the adapter ring 6; After the first flange 61 of the adapter ring 6 is connected to the engine air inlet flange 7, there is a gap between the first sealing ring 2 and the surface of the air inlet flange 1, and the first sealing ring 2 is in an uncompressed state. During the installation of the engine side entry, a gap is reserved between the air inlet and the sealing device, which is convenient for the adjustment of the installation posture of the engine. After the engine is installed in place, a plurality of abutting pieces are inserted and fixed between the limiting piece 62 and the collar 4 in a distributed manner around the adapter ring 6, and the insertion of the abutting pieces pushes the collar 4. Move to the side away from the first flange 61, that is, move the collar 4 to the side of the inlet flange 1, and squeeze the first sealing ring 2 onto the surface of the inlet flange 1 to complete the sealing The face seal between the unit and the air intake.

The cross section of the abutting piece in the direction perpendicular to the surface of the first flange 61 can be one of rectangle, trapezoid and triangle, or other irregular shapes, which can abut the collar 4 away from the first flange. 61 is enough. When the cross section is rectangular, the abutting piece is inserted between the collar 4 and the limiting piece 62 through a large external force, and an interference fit is formed between the abutting piece, the collar 4 and the limiting piece 62, so that the The first sealing ring 2 is extruded on the inlet flange 1 , and chamfered or rounded corners may also be provided on the side of the rectangular abutting member facing the adapter ring 6 . When the abutting member is trapezoidal or triangular, inserting between the collar 4 and the limiting member 62 from the side with the smaller cross-section (thinner side), the abutting member can be easily inserted, and the abutting member can be inserted into To form an interference fit with the collar 4 and the limiting member 62 , it is ensured that the first sealing ring 2 is pressed on the inlet flange 1 .

After the abutting member is inserted between the collar 4 and the limiting member 62 , the abutting member and the limiting member 62 are fixedly connected by a locking screw 9 . In other embodiments, there may be various ways of fixing the abutting member and limiting position, such as riveting and welding, etc., which can play the role of fixing the abutting member and limiting the position and prevent the abutting member from slipping off.

As shown in FIG. 3 and FIG. 4 , the limiting member 62 is a second flange fixed on the outer periphery of the adapter ring 6 , and the locking screw 9 passes through the second flange to fix the abutting member. A threaded blind hole 91 that is threadedly connected with the locking screw 9 is provided on the component. In the embodiment of the present application, the second flange and the adapter ring 6 are integrally provided.

The abutting member is an arc-shaped wedge ring 5, the thickness of the arc-shaped wedge ring 5 gradually decreases from the outside to the inside, and the side of the arc-shaped wedge ring 5 abutting against the limiting member 62 and the limiting member 62. The position piece 62 is fitted. It can be understood that the cross-section of the arc-shaped wedge ring 5 is a right-angled trapezoid, a right-angled triangle, or other shapes deformed on a right-angled trapezoid and a right-angled triangle, such as deforming the hypotenuse of a right-angled trapezoid and a right-angled triangle into a curve; when it is a right-angled trapezoid , the middle right-angled side is attached to the limiting member 62 , the adjacent right-angled sides serve as the outer side and inner side of the arc-shaped wedge ring 5 , and the hypotenuse abuts the collar 4 . The number of the arc-shaped wedge rings 5 is two, the inner diameter of each arc-shaped wedge ring 5 is the same and the circumference is half a circle. The inner diameter of the two arc-shaped wedge rings 5 is the same as that of the adapter ring 6. The outer diameters are the same, and the two arc-shaped wedge rings 5 form a continuous and complete ring surrounding the adapter ring 6 . In other embodiments, the number of arc-shaped wedge rings 5 may be three or more, and multiple arc-shaped wedge rings 5 may not necessarily form a complete continuous ring.

The side surface of the collar 4 facing the first flange 61 is set as an inclined surface matching and fitting with the arc-shaped wedge ring 5 . After the arc-shaped wedge ring 5 is inserted, the inclined surface of the arc-shaped wedge ring 5 is matched with the end face of the sleeve ring 4, which reduces the gap between the sleeve ring 4 and the limiter 62, and improves the arc-shaped wedge ring 5 and the sleeve. Stability of the connection structure between the ring 4 and the limiter 62 .

The first sealing ring 2 may be directly bonded to the end face of the collar 4, or may be fixed in other ways.

In the embodiment of the present application, the fixing method of the first sealing ring 2 is that an annular groove 21 is provided on the end surface of the collar 4 away from the first flange 61 , and the first sealing ring 2 is fixed on the annular groove 21 . into the groove 21 and protrude from the annular groove 21 . The first sealing ring 2 is glued in the annular groove 21 . The first sealing ring 2 is partially embedded in the annular groove 21 to improve the stability of the connection between the first sealing ring 2 and the collar 4 . At the same time, the first sealing ring 2 keeps a certain distance from the inner surface of the intake port, and the forward extension of the adapter ring 6 (the part used for the sleeve ring 4) also separates the first sealing ring 2 from the inner flow channel of the intake port , which can prevent the convex part from entering the inner pipeline of the intake port when the first sealing ring 2 is under pressure, thereby ensuring that the inner flow channel wall surface of the interface between the intake port and the engine is relatively smooth without protrusions, which is beneficial to reduce the loss of intake flow.

The first sealing ring 2 is made of sponge rubber plate, which has a large amount of compression, which can not only be used as the end face sealing material between the collar 4 and the inlet flange 1, but also used to compensate for the forward transmission of the engine in the axial direction. displacement due to force and thermal expansion.

An annular groove 31 is provided on the inner wall of the collar 4, and a second sealing ring 3 is arranged in the annular groove 31. The collar 4 is sleeved on the adapter, and the second sealing ring 3 is in sealing contact with the inner wall of the adapter ring 6 to achieve radial sealing between the collar 4 and the adapter ring 6 .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides an intake duct sealing device, its characterized in that, includes adapter ring, the lantern ring and a plurality of butt piece, a terminal surface of adapter ring is equipped with first flange, be equipped with first sealing washer on the terminal surface of the lantern ring, the lantern ring is with setting up the terminal surface of first sealing washer is back to the direction cover of first flange is located on the adapter ring, still be equipped with outstanding locating part on the lateral wall of adapter ring, the locating part set up in between the lantern ring and the first flange, lantern ring butt during the locating part, first sealing washer is not outstanding the terminal surface of adapter ring is a plurality of the butt piece encircle in the adapter ring periphery is a plurality of the butt piece inserts between the locating part and the lantern ring, make the lantern ring is to keeping away from one side of first flange removes extremely first sealing washer is outstanding the terminal surface of adapter ring.

2. The duct sealing device of claim 1, wherein the abutment member is an arc-shaped wedge ring, the thickness of the wedge-shaped wedge ring gradually decreases from the outside to the inside, and one side of the arc-shaped wedge ring abutting against the limiting member is attached to the limiting member.

3. The inlet seal of claim 2, wherein the number of said arcuate wedge rings is two, each of said arcuate wedge rings having a uniform inner diameter and a half-circle circumference.

4. The inlet seal of claim 2, wherein the side of the collar facing the first flange is provided with a bevel that mates with the arcuate wedge ring.

5. The duct sealing device according to claim 1, wherein the abutment member is fixedly connected to the retainer by a locking screw after the abutment member is inserted between the collar and the retainer.

6. The inlet seal of claim 5, wherein the retainer is a second flange fixed to the outer periphery of the adapter ring, and the locking screw passes through the second flange to fix the abutment member.

7. The inlet seal of claim 1, wherein an annular groove is provided on an end surface of the collar remote from the first flange, and the first seal ring is fixed in the annular groove and protrudes out of the annular groove.

8. The inlet seal of claim 7, wherein the first seal ring is made of a sponge rubber plate.

9. The air inlet channel sealing device according to claim 1, wherein an annular groove is formed in the inner wall of the sleeve ring, a second sealing ring is arranged in the annular groove, the sleeve ring is sleeved on the adapter, and the second sealing ring is in sealing fit with the inner wall of the adapter ring.

10. The inlet duct sealing device according to claim 1, wherein the first flange is used for being fixedly connected with an engine inlet flange through bolts, and a gap exists between an end face of the adapter ring, which is far away from the first flange, and a 1-face of the inlet duct flange after installation.

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