CN216695329U

CN216695329U - Combustion chamber test piece and lead sealing device

Info

Publication number: CN216695329U
Application number: CN202220372141.6U
Authority: CN
Inventors: 田晓飞; 易琪; 王西
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-06-07
Anticipated expiration: 2032-02-23

Abstract

The utility model aims to provide a combustion chamber test piece and a lead sealing device. The lead sealing device comprises a lead mounting seat, a bottom support, a pressing cap, an upper cover and sealant. The lead wire mount pad is inside to have the lead wire chamber that runs through the setting, and the periphery has first external screw thread and second external screw thread. The bottom bracket is provided with a first lead hole and a first opening, and the lead is allowed to enter the first lead hole from the first opening. The press cap is accommodated in the lead wire cavity and has a second lead wire hole and a second opening, and the lead wire is allowed to enter the second lead wire hole from the second opening. The upper cover is provided with a through hole and is connected with the lead wire mounting seat through a second external thread, and the pressing cap is pressed in the lead wire cavity by the upper cover after penetrating through the through hole. The sealant is filled in a lead wire cavity between the bottom support and the pressing cap and between the lead wire and the first lead hole and between the lead wire and the second lead hole. The lead sealing device can be used for facilitating the lead and simultaneously ensuring the sealing reliability of the test piece.

Description

Combustion chamber test piece and lead sealing device

Technical Field

The utility model relates to the field of engine testing, in particular to a combustion chamber test piece and a lead sealing device.

Background

A single-sector combustion chamber testing device is generally adopted in the process of developing a combustion chamber part of an aeroengine at present, in order to obtain required temperature data inside the single-sector combustion chamber testing device, a thermocouple lead sealing device must be arranged on a casing of a single-sector combustion chamber, and leakage at the thermocouple lead sealing position is guaranteed not to occur.

The structure commonly used at present comprises a mounting seat, a compression nut, a sealing gasket and a sealing glue which are welded on a casing, and the structure has small sealing and bearing capacity and is generally applied to occasions with lower pressure. And the welding joint crack damage is easy to generate by adopting a welding connection mode.

For a single-sector combustion chamber test device, the internal pressure can reach 3MPa, the temperature is about 900K, and because the number of measuring points is large, a lead hole with a large aperture is usually arranged for leading, but the lead hole with the large diameter can influence the sealing efficiency. Therefore, a large-aperture lead sealing device with a reliable structure needs to be designed, so that the sealing reliability of a test piece is ensured, and the test safety and the accuracy of measurement data are ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lead sealing device which can facilitate lead and ensure the sealing reliability of a test piece.

The lead sealing device for achieving the purpose comprises a lead mounting seat, a bottom support, a pressing cap, an upper cover and sealant. The lead wire mount pad is inside to have the lead wire chamber that runs through the setting, and the periphery interval is laid first external screw thread and second external screw thread, first external screw thread be used for with treat that the sealing member is connected. The bottom support is accommodated in the lead wire cavity, a first lead wire hole is formed in the bottom support, a first opening is formed in the side face of the bottom support, and a lead wire is allowed to enter the first lead wire hole from the first opening. The pressing cap is accommodated in the lead wire cavity, is closer to the second external thread relative to the bottom support, is internally provided with a second lead wire hole, is provided with a second opening on the side surface, and allows a lead wire to enter the second lead wire hole from the second opening. The upper cover has the through-hole, the upper cover pass through the second external screw thread with the lead wire mount pad is connected, under connected state, press the cap to wear to establish behind the through-hole, by the upper cover compress tightly in the lead wire chamber. And sealant is filled in the lead wire cavity between the bottom support and the pressing cap and between the lead wire and the first lead wire hole and the second lead wire hole.

In one or more embodiments, a first flange is further arranged on the periphery of the lead mounting seat between the first external thread and the second external thread, and a sealing ring is arranged between the first flange and the first external thread.

In one or more embodiments, the lead wire passes out of the component to be sealed from the lead wire direction and passes through the lead wire sealing device; the first lead hole is provided with a first hole expanding part, the first hole expanding part extends from the end face of the bottom support towards the inner side, and the inner diameter of the first hole expanding part is gradually increased along the positive direction of the lead direction.

In one or more embodiments, the second lead hole has a second enlarged hole portion extending from an end surface of the press cap toward the inside, and the inner diameter of the first enlarged hole portion gradually decreases in the positive direction of the lead direction.

In one or more embodiments, the lead lumen has an inlet and an outlet in order, in the positive direction of the lead direction; wherein the lead lumen has a first lumen and a second lumen at the entrance, the first lumen having an inner diameter smaller than the inner diameter of the second lumen to form a first shoulder between the first lumen and the second lumen, the shoe received in the lead lumen being supported by the first shoulder.

In one or more embodiments, the lead lumen further comprises a third lumen and a fourth lumen, the fourth lumen having the outlet, the third lumen connecting the second lumen and the fourth lumen, and the inner diameter gradually increasing in a positive direction of the lead direction; and when the pressing cap accommodated in the lead cavity is pressed by the upper cover, the pressing cap is abutted against the third inner cavity.

In one or more embodiments, the pressing cap has a first section and a second section, the outer diameter of the first section is larger than that of the second section, so as to form a second shoulder between the first section and the second section, and in a connection state, after the second section penetrates through the through hole, the upper cover applies force to the pressing cap through the second shoulder.

In one or more embodiments, the upper cover has a second flange, the first flange and the second flange have a hexagonal outer contour, and a lockwire hole is opened in the first flange and the second flange.

In one or more embodiments, an asbestos cord wrapped around the lead wire is also included.

It is another object of the present invention to provide a combustor test piece with thermocouple wires led out of the combustor by a lead sealing device as described above.

The beneficial effects of the utility model include:

through setting up first opening and second opening for the lead wire can draw in first pin hole and second pin hole from the side, thereby under the prerequisite of guaranteeing to be able to the threading, has effectively reduced the collet and/or has pressed the internal diameter size of cap, has guaranteed the colleague of the convenience of lead wire, has improved this lead wire sealing device's sealing performance.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 illustrates an exploded schematic view of a lead sealing device according to some embodiments of the present application;

fig. 2 illustrates a schematic cross-sectional view of a lead sealing device according to some embodiments of the present application;

fig. 3 illustrates an exploded view of a lead sealing device with an upper cover removed according to some embodiments of the present application.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In order to provide a means for testing the reliability of the seal of the device and facilitating the lead, according to some embodiments of the present application, in one aspect, a lead sealing device is provided.

Referring to fig. 1 and 2, fig. 1 illustrates an exploded view of a lead sealing device according to some embodiments of the present application, and fig. 2 illustrates a cross-sectional view of the lead sealing device according to some embodiments of the present application. The lead sealing device comprises a lead mounting seat 1, a bottom support 2, a pressing cap 3, an upper cover 4 and sealant. The lead wire mounting seat 1 is internally provided with a lead wire cavity 10 which penetrates through the lead wire mounting seat, a first external thread 11 and a second external thread 12 are arranged at intervals on the periphery of the lead wire mounting seat, and the first external thread 11 is used for being connected with a component 9 to be sealed. The bottom support 2 is accommodated in the lead cavity 10, a first lead hole 20 is formed inside the bottom support, a first opening 21 is formed on the side surface of the bottom support, and the lead 8 is allowed to enter the first lead hole 20 from the first opening 21. The pressing cap 3 is accommodated in the lead wire cavity 10, and is closer to the second external thread 12 relative to the bottom support 2, a second lead wire hole 30 is opened in the pressing cap 3, a second opening 31 is opened on the side surface, and the lead wire 8 is allowed to enter the second lead wire hole 30 from the second opening 31. The upper cover 4 is provided with a through hole 40, the upper cover 4 is connected with the lead wire mounting base 1 through the second external thread 12, and in a connection state, after the pressing cap 3 penetrates through the through hole 40, the upper cover 4 is pressed in the lead wire cavity 10. The sealant is filled in the lead wire cavity 10 between the bottom support 2 and the pressing cap 3 and in the areas between the lead wires 8 and the first and

second lead holes

20 and 30.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated.

The first and

second wire holes

20 and 30 are arranged in series in the wire cavity 10, both defining a passage for the wire 8 as it passes through the wire sealing device.

The first opening 21 and the second opening 31 are respectively opened at the side of the bottom support 2 and the pressing cap 3, and may be gaps as shown in fig. 1 to 2, and in a specific embodiment, the width of the first opening 21 and the second opening 31 is between 1mm and 1.2 mm.

For a single-sector combustion chamber test piece, the number of required measuring points is large, so that the number of thermocouple leads is large, generally 20 to 35, and each thermocouple lead is provided with a joint structure with the diameter of about 3mm, so that the thermocouple leads are bent in the wiring process of the thermocouple leads, and the occupied inner diameter space of the thermocouple leads is enlarged. If the inner diameter of the bottom support 2 is penetrated from bottom to top, the latter lead always rubs with the existing lead in the first lead hole 20 in the bottom support 2, which is easy to cause the fracture of the thermocouple wire. To pass all thermocouple leads, the inner diameter of the first lead hole 20 is at least larger than the total diameter occupied by 35 leads plus the size of the last 3mm joint of the leads, so that the required inner diameter of the first lead hole 20 in the base plate 2 is very large, and an excessively large inner diameter of the first lead hole 20 may cause the sealant to flow out from the bottom of the base plate 2, resulting in poor or even impossible sealing.

As shown in fig. 3, the first opening 21 and the second opening 31 are provided, so that the lead 8 can be pulled into the first lead hole 20 and the second lead hole 30 from the side surface, thereby effectively reducing the inner diameter of the bottom support 2 and/or the pressing cap 3 on the premise of ensuring threading, ensuring the convenience of the lead, and improving the sealing performance of the lead sealing device.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

According to some embodiments of the present application, the lead wire mounting base 1 further has a first flange 13 at the outer periphery between the first external thread 11 and the second external thread 12, and a seal ring 5 is disposed between the first flange 13 and the first external thread 11. As shown in fig. 2, after being screwed to the member to be sealed 9, the first flange 13 presses the seal ring 5 against the member to be sealed 9, thereby sealing therebetween. In a particular embodiment, the seal ring 5 is a C-shaped seal ring.

In the traditional lead sealing device, if threaded connection is adopted, high-temperature and high-pressure gas leakage can be caused at the threaded connection part, and the accuracy of test data and the test safety are influenced. Above problem has effectively been solved through setting up sealing washer 5, simultaneously, the in-process is disassembled to the lead wire sealing device who adopts threaded connection, because the compressing tightly of upper cover 4, makes sealed glue be full of in the lead wire chamber 10 of whole lead wire mount pad 1, and after the dry sclerosis, collet 2 can the adhesion in lead wire mount pad 1, hardly takes out. Adopt threaded connection, then can disassemble whole lead wire seal structure and put after getting off and soak in organic solvent, strike collet 2 from the bottom simultaneously, can take out it smoothly. By adopting the mode of additionally arranging the sealing ring 5, the convenience of dismounting and mounting the whole lead sealing device is ensured on the basis of ensuring the reliability of sealing.

According to some embodiments of the application, the lead 8 is led out of the component 9 to be sealed from the lead direction a and through the lead sealing device. The first lead hole 20 has a first enlarged hole portion 201, and the first enlarged hole portion 201 extends from the end surface of the shoe 2 toward the inside, and the inner diameter of the first enlarged hole portion 201 gradually increases in the positive direction of the lead direction a.

Further, the second lead hole 30 has a second enlarged hole portion 301, and the second enlarged hole portion 301 extends from the end surface of the crimp cap 3 toward the inside, and the inner diameter of the first enlarged hole portion 301 gradually decreases in the positive direction of the lead direction a.

Through the arrangement of the first reaming part 201 and/or the second reaming part 301 with the conical surface structure, when the upper cover 4 is screwed down, the pressing cap 3 can be driven to move downwards, the conical surface applies centripetal force perpendicular to the conical surface to the sealant, so that the sealant is filled in the gap, and the sealing performance of the lead sealing device is effectively improved.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

According to some embodiments of the present application, the lead lumen 10 has an inlet 10a and an outlet 10b in sequence, in the positive direction of the lead direction a. The lead cavity 10 has a first cavity 101 and a second cavity 102 at the entrance, the first cavity has the entrance 10a, the inner diameter of the first cavity 101 is smaller than the inner diameter of the second cavity 102, so as to form a first shoulder 1010 between the first cavity 101 and the second cavity 102, and the shoe 2 accommodated in the lead cavity 10 is supported by the first shoulder 1010. In other embodiments, different from that shown in the drawings, the mounting 2 may be supported in the lead cavity 10 in other suitable variations or modifications, such as by a collar.

Further, according to some embodiments of the present application, the lead lumen 10 further includes a third lumen 103 and a fourth lumen 104, the fourth lumen 104 has the aforementioned outlet 10b, the third lumen 103 connects the second lumen 102 and the fourth lumen 104, and the inner diameter gradually increases along the positive direction of the lead direction a. Wherein, the pressing cap 3 accommodated in the lead wire cavity 10 is pressed by the upper cover 4 and is abutted against the third inner cavity 103. Through setting up third inner chamber 103 section that has the gradual change internal diameter, be convenient for realize pressing cap 3 in the spacing that compresses tightly of lead wire chamber 10, also be convenient for be full of sealed glue in the clearance, effectively increased this lead wire sealing device's sealing performance.

According to some embodiments of the present application, the pressing cap 3 has a first section 30a and a second section 30b, an outer diameter of the first section 30a is larger than an outer diameter of the second section 30b to form a second shoulder 300 between the first section 30a and the second section 30b, and after the second section 30b is inserted into the through hole 40 in the connection state, the upper cover 4 applies force to the pressing cap 3 through the second shoulder 300.

According to some embodiments of the present application, the upper cover 4 has a second flange 41, the first flange 13 and the second flange 41 have hexagonal outer contours, and the lock screw hole 6 is opened in the first flange 13 and the second flange 41. Through preparing first flange 13 and second flange 41 for the hexagonal head structure of outline for the hexagon to in the realization adopt the instrument to screw the assembly, set up lock silk hole 6 simultaneously, can realize through lock silk locking, prevent that the sealed red glue crackle that upper cover 4 that the vibration leads to and lead wire mount pad 1 position relative change leads to in the test process from appearing leaking gas.

According to some embodiments of the present application, the present lead sealing device further comprises an asbestos cord wound around the lead 8. Adopt high temperature resistance asbestos rope winding lead wire 8's sealed mode, can make the dense red glue of most invade asbestos rope and around lead wire 8 clearance, prevent that most liquid sealant from directly flowing along glossy 8's of lead wire clearance, finally lead to sealed effect relatively poor.

In accordance with some embodiments of the present application, on the other hand, there is provided a test piece for a combustion chamber, in which a thermocouple wire is led out from the combustion chamber by a lead sealing device as described in one or more of the above-mentioned embodiments, the lead 8 is a thermocouple wire, and the member to be sealed 9 is a combustion chamber. In a particular embodiment, the component 9 to be sealed is a single-ended combustor test piece, a fan-shaped combustor, a full-ring combustor, or other high-temperature, high-pressure test piece.

The assembly process of the lead sealing device is as follows: firstly, the C-shaped sealing ring 5 is sleeved at the bottom of the lead mounting seat 1, the lead mounting seat 1 is connected with the single-sector combustion chamber outer box through threads and is screwed down, then thermocouple leads 8 are pulled into the pressure cap 3 through the pressure cap 3, the first opening 21 and the second opening 31 on the bottom support 2 as shown in figure 1, the first lead hole 20 and the second lead hole 30 of the bottom support 2 are arranged until all the thermocouple leads 8 are placed into the first lead hole 20 and the second lead hole 30, and then the bottom support 2 is placed at the bottom of the lead mounting seat 1 according to the position in the figure and is attached to a spigot at the bottom of the lead mounting seat 1. The cap 3 and the thermocouple lead 8 in the bottom support 2 are wound by a high-temperature resistant asbestos rope, high-temperature resistant sealing red glue is filled in the lead cavity 10, and finally the upper cover 4 and the lead mounting seat 1 are screwed down, so that the sealing red glue is compacted by the cap 3 through the inner conical surface of the cap and invades into a gap between the asbestos rope and the thermocouple. After the assembly is finished, the sealing red glue is continuously extruded into the top of the pressing cap 3 until the sealing red glue overflows, the sealing glue of the lead mounting seat is finished, the lead mounting seat is kept still for 24 hours, the sealing red glue is guaranteed to be dried and hardened, and the sealing function is realized.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A lead sealing device, comprising:

the lead wire mounting seat is internally provided with a lead wire cavity which is arranged in a penetrating way, and first external threads and second external threads are distributed at intervals on the periphery of the lead wire mounting seat, and the first external threads are used for being connected with a component to be sealed;

the bottom support is accommodated in the lead wire cavity, a first lead wire hole is formed in the bottom support, a first opening is formed in the side face of the bottom support, and a lead wire is allowed to enter the first lead wire hole from the first opening;

the pressing cap is accommodated in the lead wire cavity, is closer to the second external thread relative to the bottom support, is internally provided with a second lead wire hole, is provided with a second opening on the side surface, and allows a lead wire to enter the second lead wire hole from the second opening;

the upper cover is provided with a through hole and is connected with the lead wire mounting seat through the second external thread, and in a connection state, the pressing cap is tightly pressed in the lead wire cavity by the upper cover after penetrating through the through hole; and

and the sealant is filled in the lead wire cavity between the bottom support and the pressing cap and between the lead wire and the first lead wire hole and the second lead wire hole.

2. The lead sealing device of claim 1, further comprising a first flange disposed about the lead mount between the first external thread and the second external thread, wherein a sealing ring is disposed between the first flange and the first external thread.

3. The lead sealing device of claim 1, wherein the lead passes out of the component to be sealed from the lead direction and through the lead sealing device;

the first lead hole is provided with a first hole expanding part, the first hole expanding part extends from the end face of the bottom support towards the inner side, and the inner diameter of the first hole expanding part is gradually increased along the positive direction of the lead direction.

4. The lead sealing device according to claim 3, wherein the second lead hole has a second enlarged hole portion extending from an end surface of the press cap toward an inner side, and an inner diameter of the first enlarged hole portion gradually decreases in a positive direction of the lead direction.

5. The lead sealing device of claim 3, wherein the lead chamber has an inlet and an outlet in sequence in the positive direction of the lead direction;

wherein the lead lumen has a first lumen and a second lumen at the entrance, the first lumen having an inner diameter smaller than the inner diameter of the second lumen to form a first shoulder between the first lumen and the second lumen, the shoe received in the lead lumen being supported by the first shoulder.

6. The lead sealing device according to claim 5, wherein the lead chamber further comprises a third inner chamber and a fourth inner chamber, the fourth inner chamber having the outlet, the third inner chamber connecting the second inner chamber and the fourth inner chamber and having an inner diameter gradually increasing in a positive direction of the lead direction;

and when the pressing cap accommodated in the lead cavity is pressed by the upper cover, the pressing cap is abutted against the third inner cavity.

7. The lead sealing device of claim 1, wherein the gland has a first section and a second section, the first section having an outer diameter greater than an outer diameter of the second section to form a second shoulder between the first section and the second section, the upper cover applying a force to the gland through the second shoulder after the second section is inserted through the through hole in the connected state.

8. The lead sealing device of claim 2, wherein the top cover has a second flange, the first and second flanges have hexagonal outer profiles, and a lock screw hole is formed in the first and second flanges.

9. The lead sealing device of claim 1, further comprising an asbestos cord wrapped around the lead.

10. A combustion chamber test piece characterized in that a thermocouple wire is led out from a combustion chamber by a lead sealing device according to any one of claims 1 to 9.