CN216077230U

CN216077230U - Sealing seat of aeroengine test lead

Info

Publication number: CN216077230U
Application number: CN202121457660.4U
Authority: CN
Inventors: 陈欣欣; 李洪美; 李鹏程; 刘宜胜; 陈静荣; 于天浩; 朱帅
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-03-18
Anticipated expiration: 2031-06-29

Abstract

The utility model relates to a seal seat of an aircraft engine test lead, which is characterized by comprising: a base (2) provided with a first wire passing hole (24) for allowing a lead wire to pass through; the sealing core (3) comprises an insertion end inserted into the first wire passing hole (24) and a second wire passing hole (33) extending from the insertion end to the other end, the second wire passing hole (33) is communicated with the first wire passing hole (24), the outer diameter of the sealing core (3) is gradually reduced along the direction close to the insertion end, and the sealing core (3) is of an integral single structure; and the screw cap (4) is in threaded connection with the base (2) and compresses the sealing core (3) in the first wire passing hole (24). The sealing core (3) is of an integral single structure, the problems of complex structure, high processing difficulty and high cost of a sealing seat in the prior art are solved, and the problem of air leakage and interference below the nut is solved.

Description

Sealing seat of aeroengine test lead

Technical Field

The utility model relates to the field of aero-engines, in particular to a seal seat of an aero-engine test lead.

Background

The test of the aeroengine mainly comprises more than ten professional tests such as flow parameters, pulsation parameters, an air system, angular displacement, vibration parameters, fuel and lubricating oil control parameters, dynamic stress parameters, blade tip clearance, blade tip amplitude parameters, rotating speed, axial force tests and signals, thousands of test leads of each specialty are distributed among fan casings, intermediate casings, high-pressure gas compressors, combustion chambers, high-pressure turbines, low-pressure turbines and accessory transmission parts, the leads comprise hard wires and flexible wires, the diameter of each wire is only 0.5mm, the diameter of each wire is 4mm, and most of the last test leads of each specialty are collected to a lead sealing seat to be led out. About 70 lead sealing seats are used for each engine, the number of the lead sealing seats is large, the sealing performance of the lead sealing seats is important, and the testing performance and the data reliability of the engine are directly influenced by the quality of the sealing performance.

The traditional test lead sealing seat adopts plane sealing, a sealing core consists of three parts, namely a bottom support 3, a gland 1 and a gasket 2, the schematic diagram of the sealing core is shown in figures 1 and 2, the size of the sealing core is larger, the sealing core belongs to a thin-wall part, and the sealing core is difficult to process and high in cost. Because the sealed core size is great, whole lead wire seat size all is bigger partially, when two test cross sections were close, often can appear interfering phenomenon. The gap between the lead seat sealing core and the test lead is too large, the nearby part is filled by the sealant, the sealant is used more, and the installation operation is troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a seal seat of an aircraft engine test lead wire, which aims to solve the problems of difficult processing and high cost of the seal seat in the related technology.

According to an aspect of an embodiment of the present invention, there is provided a seal holder for an aircraft engine test lead, the seal holder comprising:

the base is provided with a first wire passing hole allowing a lead to pass through;

the sealing core comprises an insertion end inserted into the first wire passing hole and a second wire passing hole extending from the insertion end to the other end, the second wire passing hole is communicated with the first wire passing hole, the outer diameter of the sealing core is gradually reduced along the direction close to the insertion end to form an outer conical surface, the outer conical surface is attached to an inner conical surface in the first wire passing hole, and the sealing core is of an integral single structure; and

and the nut is in threaded connection with the base and tightly presses the sealing core in the first wire passing hole.

In some embodiments, the seal core includes a tapered section at the insertion end.

In some embodiments, the seal core is provided with a gap to form an unsealed annular structure.

In some embodiments, the gap extends from the insertion end to the other end of the seal core.

In some embodiments, the seal core is a stainless steel material.

In some embodiments, the base and the nut are both made of stainless steel.

In some embodiments, the base includes a bottom plate and a cylindrical member erected on the bottom plate, and the first wire passing hole includes a central hole of the cylindrical member and a through hole provided on the bottom plate, the through hole communicating with the central hole of the cylindrical member.

In some embodiments, the base plate is provided with screw holes for attachment to an engine.

In some embodiments, a gasket affixed to the base is further included, the gasket configured to be positioned between the engine and the base.

In some embodiments, the material of the spacer is copper. Preferably, the gasket is made of red copper.

By applying the technical scheme of the utility model, the sealing core is of an integral single structure, which is beneficial to solving the problems of complex structure, high processing difficulty and high cost of the sealing seat in the prior art.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a schematic view of a seal housing of a related art aircraft engine test lead;

FIG. 2 illustrates a schematic top view of a seal housing of a related art aircraft engine test lead;

FIG. 3 shows a schematic structural view of a seal housing of an aircraft engine test lead according to an embodiment of the utility model;

FIG. 4 shows a schematic top view of a seal housing of an aircraft engine test lead according to an embodiment of the utility model;

FIG. 5 shows a schematic cross-sectional view A-A of FIG. 4;

FIG. 6 shows a schematic structural view of a seal core of a seal housing of an aircraft engine test lead according to an embodiment of the utility model; and

fig. 7 shows a schematic cross-sectional structure at B-B in fig. 6.

In the figure:

1. a gasket; 2. a base; 21. a base plate; 22. screw holes; 23. a cylindrical member; 24. a first wire passing hole; 25. an inner conical surface; 3. sealing the core; 31. a notch; 32. an outer conical surface; 33. a second wire passing hole; 4. and (4) a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 3 to 5, in the present embodiment, the sealing seat of the aircraft engine test lead comprises a base 2, a sealing core 3 and a nut 4. The base 2 is provided with a first wire passing hole 24 for allowing a lead wire to pass through; the sealing core 3 comprises an insertion end inserted into the first wire passing hole 24 and a second wire passing hole 33 extending from the insertion end to the other end, the second wire passing hole 33 is communicated with the first wire passing hole 24, the outer diameter of the sealing core 3 is gradually reduced along the direction close to the insertion end to form an outer conical surface 32, the outer conical surface 32 is attached to the inner conical surface 25 in the first wire passing hole 24, and the sealing core 3 is of an integral single structure; the nut 4 is screwed with the base 2 and presses the seal core 3 in the first wire passing hole 24.

In this embodiment, the outer diameter of the sealing core 3 is tapered in the direction close to the insertion end, and the nut 4 presses the sealing core 3 in the first wire passing hole 24, which is beneficial to ensuring the sealing performance. Furthermore, the sealing core 3 is of an integral single structure, which is also beneficial to solving the problems of complex structure, large processing difficulty and high cost of the sealing seat in the prior art.

The sealing core 3 includes a tapered section at the insertion end, and the outer diameter of the tapered end 32 is gradually reduced along the direction close to the insertion end, so that the closer the sealing core 3 is inserted into the first wire passing hole 24, the tighter the sealing core 3 is matched with the first wire passing hole 24, and the better the corresponding sealing performance is.

The sealing core 3 is provided with a notch 31 to form an unsealed annular structure, and the lead wire can enter the second wire passing hole 33 of the sealing core 3 through the notch 31, which is beneficial to simplifying the operation difficulty of installing the lead wire and the sealing seat. The gap 31 extends from the insertion end of the seal core 3 to the other end.

The sealing core 3, the base 2 and the screw cap 4 are all made of stainless steel.

The base 2 comprises a bottom plate 21 and a cylindrical part 23 erected on the bottom plate 21, and the first wire passing hole 24 comprises a central hole of the cylindrical part 23 and a through hole arranged on the bottom plate 21, and the through hole is communicated with the central hole of the cylindrical part 23. The bottom plate 21 is provided with screw holes 22 for connecting an engine.

The seal housing further comprises a gasket 1 affixed to the base 2, the gasket 1 being configured to be positioned between the engine and the base 2. Preferably, the material of the gasket 1 is copper. Preferably, the material of the gasket 1 is red copper.

As shown in fig. 1, the end of the cylindrical member 23 remote from the base 2 is provided with an external thread adapted to the nut 4. The cylindrical member 23 is further provided with a relief groove 26 at an end thereof adjacent to the base 2.

In some embodiments, the seal holder includes a plurality of seal cores of optionally different inner diameters, the inner diameters of the seal cores (the inner diameters of the second wire passing holes) being plural to accommodate different sizes of the lead wires, one of the plurality of seal cores of different inner diameters being mounted in the first wire passing hole.

The inside of the sealing core 3 is not coated with glue. The joint of the base 2 and the seal core 3 is coated with adhesive. A circle of glue can be coated at will, so that the glue coating amount is reduced, and the quick glue coating machine is convenient to install, disassemble and clean quickly.

The seal seat of the aeroengine test lead mainly comprises a gasket 1, a base 2, a seal core 3 and a nut.

The sealing core 3 can be taken out for independent processing and batch production due to more specifications. The process of installing the seal seat is as follows:

1. the test lead passes through the gasket 1 and the base 2;

2. 2M 6 bolts and locking plates penetrate through the base 2 and the gasket 1 to be connected with a mounting seat on an engine, and a torque wrench is used for screwing 2 bolts with proper torque and driving a fuse;

3. the sealing core 3 with different specifications is selected according to the number of the testing leads and the thickness of the leads, for example: the inner parts of 8 air pipes and thermocouples can be selected to be 5 sealed cores with the diameter and the groove width of 1.6, one telemetry wire can be selected to be 5 sealed cores with the diameter and the groove width of 3.5, the sealed core is directly pressed into the base after being clamped into a lead, and attention is paid to the fact that no glue is applied to the sealed core;

4. coating a circle of Aoyyuxin AK05-4 sealant (commonly called red sealant) on the periphery of the joint of the base 2 and the sealing core 3, wherein multiple points and few points can be used, then the test lead penetrates out of the screw cap, and the screw cap is screwed by using a 24-opening wrench;

5. coating sealant Olympic Kexin AK05-4 along the test lead outside the screw cap, and keeping in mind that the space between the wires is coated with the sealant;

6. finally, the test leads are tied tightly by a binding band.

The technical effects of the embodiment are as follows:

1. the structure of the sealing core is simplified, and the sealing core is simplified into one part from the original three parts of a bottom support, a gland and a gasket;

2. because the conical surface sealing is adopted, the structure is compact, the peripheral size is greatly reduced, the weight can be reduced after the size of the testing lead seat is reduced, the weight of one set of lead seat is only 1/3, the material is saved, the design concept of miniaturization and light weight is met, and the problem of mutual interference between a housing nut and an external pipeline of an engine or an adjacent section testing sensor is also favorably avoided;

3. the inside of the sealing core is not coated with glue, the sealing core 3 is coated with a circle of glue at will at the outlet of the screw cap after being pressed into the base 2, multiple points and few points can be achieved, and the glue coating amount is reduced, so that the quick installation and the quick disassembly are facilitated. 2 hours are needed for installing a sealing seat originally, 1 hour is needed for disassembling the sealing seat, only 1 hour is needed for installing a novel sealing seat at present, and only 0.4 hour is needed for disassembling the sealing seat;

4. the sealing seat is easy to remove glue after being disassembled, and originally, the glue is difficult to remove because the gap part in the sealing core is filled with the glue, hands can be hurt by carelessness, and potential safety hazards exist.

5. The outer conical surface of the toper section of sealed core 3 laminates with the interior conical surface in the first wire passing hole 24 mutually and realizes sealedly, and the wire guide seat of this embodiment can also effectively solve the gas leakage problem of overcoat nut below.

6. The percentage of the work efficiency is T1/T2-3.8/1.7-1-1.235.

The present invention is not limited to the above exemplary embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seal receptacle for an aircraft engine test lead, comprising:

a base (2) provided with a first wire passing hole (24) for allowing a lead wire to pass through;

the sealing core (3) comprises an insertion end inserted into the first wire passing hole (24) and a second wire passing hole (33) extending from the insertion end to the other end, the second wire passing hole (33) is communicated with the first wire passing hole (24), the outer diameter of the sealing core (3) is gradually reduced along the direction close to the insertion end to form an outer conical surface (32), the outer conical surface (32) is attached to an inner conical surface (25) in the first wire passing hole (24), and the sealing core (3) is of an integral single structure; and

the nut (4) is in threaded connection with the base (2) and compresses the sealing core (3) in the first wire passing hole (24).

2. The seat according to claim 1, characterized in that the sealing core (3) comprises a tapered section at the insertion end.

3. The seat according to claim 1, characterized in that the core (3) is provided with notches (31) to form an unsealed annular structure.

4. A seat according to claim 3, characterized in that said notch (31) extends from the insertion end to the other end of the core (3).

5. The seat according to claim 1, characterized in that the core (3) is of stainless steel material.

6. The seat according to claim 1, characterized in that the base (2) and the nut (4) are made of stainless steel.

7. The seat according to claim 1, characterized in that the base (2) comprises a bottom plate (21) and a cylindrical member (23) erected on the bottom plate (21), and the first wire passing hole (24) comprises a central hole of the cylindrical member (23) and a through hole provided on the bottom plate (21), the through hole communicating with the central hole of the cylindrical member (23).

8. The seal holder according to claim 7, characterized in that the bottom plate (21) is provided with screw holes (22) for connection to an engine.

9. The seal holder according to claim 1, further comprising a gasket (1) affixed to the base (2), the gasket (1) being configured to be positioned between an engine and the base (2).

10. The seat according to claim 9, characterized in that the material of said gasket (1) is copper.