CN211524959U - Precise pipeline containing inner nested pipe and aircraft engine fuel nozzle thereof - Google Patents
Precise pipeline containing inner nested pipe and aircraft engine fuel nozzle thereof Download PDFInfo
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- CN211524959U CN211524959U CN202020121012.0U CN202020121012U CN211524959U CN 211524959 U CN211524959 U CN 211524959U CN 202020121012 U CN202020121012 U CN 202020121012U CN 211524959 U CN211524959 U CN 211524959U
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Abstract
The utility model provides a precise pipeline containing an inner nested pipe and an aircraft engine fuel nozzle thereof, wherein the precise pipeline comprises a first pipeline main body, a second pipeline main body and the inner nested pipe, one end of the inner nested pipe is installed in the second pipeline main body, a plurality of troughs are arranged on the second pipeline main body, and the troughs and the inner nested pipe are spaced; the other end of the inner nested pipe is installed in the first pipeline main body, and the first pipeline main body and the second pipeline main body are buckled up and down and are welded into a whole. The utility model discloses redesigned the position and the shape of brazing filler metal groove, realized that the brazing filler metal is to the complete filling of all welding seams, the brazing seam does not have defects such as hole and not welded, has guaranteed that the brazing seam quality accords with design operation requirement, provides technical support for the application of the accurate pipeline welded structure who contains interior nested pipe in aeroengine.
Description
Technical Field
The utility model relates to an aeroengine field, in particular to precision pipeline and aeroengine fuel nozzle of nested pipe in containing.
Background
In the prior art, the brazing technology has the advantages of high welding precision, small influence on base metal and the like, and is widely applied to manufacturing and assembling of high-temperature alloy pipeline parts of an aircraft engine. For example, in an aircraft engine, a fuel nozzle needs to be connected with multiple oil passages and multiple gas passages, and different parts are provided with multiple parallel internal pipelines which are connected through a brazing process.
An in-line bushing is commonly used and a vacuum brazing process is used to connect multiple lines inside different parts. The original brazing structure is designed to arrange a brazing filler metal groove around the embedded sleeve, and brazing filler metal is placed in the brazing filler metal groove for brazing. The method has the advantages that the qualified rate of the brazed parts is low, and the problems that the welding seams between the inner nested pipes and the pipelines are not welded locally and the like are often caused.
The main reasons for this analysis are as follows: firstly, the number of the inner nested pipes is large, and the coating amount of the brazing filler metal is insufficient due to the influence of the size of a brazing filler metal groove when all the inner nested pipes and pipelines are welded.
And secondly, the brazing filler metal grooves are formed in the two parts, a large space is formed between the adjacent brazing filler metal grooves after the parts are assembled, the capillary action of the brazing filler metal is reduced, the flowing of the brazing filler metal is influenced, part of the brazing filler metal is accumulated in the brazing filler metal grooves, and the quantity of the brazing filler metal filled in welding seams is further reduced.
FIG. 1 is a perspective view of a precision tube of an internally nested tube in a prior art fuel nozzle assembly. FIG. 2 is a top view of a precision tube of nested tubes in a prior art fuel nozzle assembly. Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
As shown in fig. 1 to 3, in the fuel nozzle assembly, a plurality of fuel lines 30 inside two members 20 are connected by using an inner nesting pipe 10 and welded by a brazing process. A brazing material groove 40 is usually arranged around the inner nested tube 10, and brazing material is put into the brazing material groove 40, and then the part 20 to be welded is assembled and is brazed in a furnace. And brazing filler metal flows into the gap to realize brazing connection through the capillary action of the inner nested pipe and the pipeline gap.
However, due to solder channel size limitations, the solder tends to be insufficient to fill the weld. In addition, the brazing filler metal capillary action of the gaps between the inner nested pipes and the pipelines is reduced by the brazing filler metal groove, the brazing filler metal is easy to accumulate in the brazing filler metal groove, and the brazing filler metal amount for filling the welding seams is reduced. Therefore, the welding seam is often not welded and the like.
In view of the above, those skilled in the art have developed a precision piping structure including nested pipes in order to overcome the above-mentioned technical problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an accurate pipeline and aeroengine fuel nozzle that contain interior nested pipe in order to overcome among the prior art defect such as not welding appears easily in the fuel pipeline welding seam of interior nested pipe.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
a precision pipeline comprising an inner nested pipe is characterized by comprising a first pipeline main body, a second pipeline main body and the inner nested pipe, wherein one end of the inner nested pipe is installed in the second pipeline main body, a plurality of material troughs are formed in the second pipeline main body, and the material troughs and the inner nested pipe are spaced;
the other end of the inner nested pipe is installed in the first pipeline main body, and the first pipeline main body and the second pipeline main body are buckled up and down and are welded into a whole.
According to an embodiment of the invention, the trough is a brazing trough.
According to the utility model discloses an embodiment, be provided with a plurality of bosss in the second pipeline main part, each the boss encircles corresponding one interior nested pipe is around, every two adjacent form between the boss the solder pot.
According to an embodiment of the invention, the boss is rectangular, square or circular.
According to an embodiment of the present invention, the top end surface of the boss abuts against the joint end surface of the first pipe main body.
According to the utility model discloses an embodiment, the one end of interior nested pipe with pipeline intercommunication in the second pipeline main part, the other end of interior nested pipe with pipeline intercommunication in the first pipeline main part.
According to the utility model discloses an embodiment, the brazing filler metal is filled to the brazing filler metal inslot.
According to an embodiment of the invention, the brazing filler metal is a paste-like brazing filler metal.
According to the utility model discloses an embodiment, accurate pipeline adopts the hot cycle processing of brazing.
The utility model also provides an aeroengine fuel nozzle, a serial communication port, aeroengine fuel nozzle includes as above the accurate pipeline of interior nested pipe.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses the position and the shape of brazing filler metal groove have been redesigned to the precision pipeline of nested pipe in containing and aeroengine fuel nozzle thereof, have realized that the brazing filler metal is to the complete filling of all welding seams, and the brazing seam does not have defects such as hole and not seam, has guaranteed that the brazing seam quality accords with design operation requirement, provides technical support for the application of the precision pipeline welded structure of nested pipe in containing in the aeroengine.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:
FIG. 1 is a perspective view of a precision tube of an internally nested tube in a prior art fuel nozzle assembly.
FIG. 2 is a top view of a precision tube of nested tubes in a prior art fuel nozzle assembly.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
Fig. 4 is a perspective view of the precision pipeline including the inner nested tube of the present invention with the first pipeline body removed.
Figure 5 is a top view of the precision pipeline including the inner nested tube of the present invention.
Fig. 6 is a cross-sectional view taken along line B-B of fig. 5.
[ reference numerals ]
Internally nested tubes 10
Brazing filler metal trough 40
Trough 210
Boss 220
First conduit body junction end face 110
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Figure 4 is a perspective view of the precision pipeline including the nested pipe of the present invention. Figure 5 is a top view of the precision pipeline including the inner nested tube of the present invention. Fig. 6 is a cross-sectional view taken along line B-B of fig. 5.
As shown in fig. 4 to 6, the utility model discloses a precision pipeline containing inner nested pipe, it includes first pipeline main part 100, second pipeline main part 200 and inner nested pipe 10, installs the one end of inner nested pipe 10 in second pipeline main part 200, has seted up a plurality of silos 210 on the second pipeline main part 200, spaced apart between silo 210 and the inner nested pipe 10. The other end of the inner nested pipe 10 is installed in the first pipeline main body 100, and the first pipeline main body 100 and the second pipeline main body 200 are fastened up and down and welded into a whole.
Preferably, here the channel 210 is preferably a solder channel.
In a further preferred embodiment, the second tube furnace main body 200 is provided with a plurality of bosses 220, each boss 220 surrounds the corresponding one of the inner nested tubes 10, and the brazing material trough, i.e. the trough 210, is formed between every two adjacent bosses 220.
The boss 220 here may preferably be rectangular, square or circular. Of course, the shape of the boss 220 can be selected according to the requirement, and is only for example and not limited, as long as the groove is formed for brazing.
When the first pipeline body 100 and the second pipeline body 200 are fastened up and down, the top end surface of the boss 220 abuts against the joint end surface 110 of the first pipeline body 100. One end of the inner nested tube 10 communicates with the pipe 230 in the second pipe body 200, and the other end of the inner nested tube 10 communicates with the pipe 120 in the first pipe body 100.
Preferably, the solder groove (i.e., the groove 210) is filled with solder. The solder is preferably a paste solder. The precise pipeline is processed by brazing heat circulation.
According to the above structural description, since in an aircraft engine fuel nozzle, for a brazed connection between an inner nested tube and a fuel line, a brazing channel adjacent to the inner nested tube will affect the quality of the weld between the inner nested tube and the line. Therefore, the utility model discloses the accurate pipeline of interior nested pipe has carried out redesign with the welded structure of fuel pipeline in first pipeline main part 100 and the second pipeline main part 200 to corresponding vacuum brazing process specification has been formulated according to welded structure.
The difference between the precision pipeline of the inner nested pipe and the traditional structure is mainly as follows: the precise pipeline of the inner nested pipe is provided with the brazing filler metal groove which is not adjacent to the inner nested pipe in the second pipeline main body 200, so that the influence of the brazing filler metal groove on the flowability of the brazing filler metal in the original welding structure is avoided, the space of the brazing filler metal groove at the outer side is larger than that of the brazing filler metal groove at the inner side, and more brazing filler metal can be accommodated, and therefore, the brazing filler metal groove only needs to be processed on the second pipeline main body 200.
Meanwhile, a brazing filler metal is preset in a brazing tank before the first and second pipeline bodies 100 and 200 are assembled, and then the inner nested tube 10 is assembled between the first and second pipeline bodies 100 and 200, and an appropriate brazing temperature and a holding time are taken to ensure the fluidity of the brazing filler metal.
The improved pipeline welding structure is adopted for carrying out a brazing test, the problems of local non-welding, holes and the like are not found after the welding line is dissected, the appearance of the welding line is good, and the design and use requirements are met.
The utility model discloses the accurate pipeline that contains interior nested pipe adopts the vacuum brazing technology, welds the accurate pipeline in the aircraft engine fuel nozzle, combines fig. 4 to fig. 6 to show, and it carries out welded concrete step and is:
cleaning before welding, namely cleaning parts to be welded by adopting absolute ethyl alcohol, removing dirt, grease and dust on the surface, and confirming that the cleanliness of the surface to be welded meets the requirement;
step two, coating brazing filler metal, preferably using paste brazing filler metal (such as AMS4777 brazing filler metal) to fill the brazing filler metal in the brazing filler metal groove (i.e. the material groove 210) as shown in FIG. 4;
step three, assembling, namely assembling the inner nested pipe 10, the first pipeline body 100 and the second pipeline body 200 according to the diagram shown in fig. 6;
putting the pipe into a furnace, placing the assembled precise pipeline of the inner nested pipe on a substrate, and using a tool clamp according to the situation;
step five, braze welding thermal cycle, wherein the pressure in the furnace is lower than 4 × 10-2Under the condition of Pa, heating to raise the temperature, keeping the temperature for 10-30 minutes after heating to the brazing temperature, cooling to be lower than 80 ℃, and discharging;
and step six, post-welding inspection, wherein the surface of the part is visually inspected, the metal luster is not oxidized, and the pipeline tightness is analyzed through flow inspection.
The brazing refers to a welding method for wetting and filling a gap of a workpiece by using brazing filler metal with a melting point lower than that of a base metal through capillary action. In the brazing process, brazing filler metal is placed in the middle or at the periphery of a weld joint, heat preservation is carried out for a short time at the brazing temperature, the brazing filler metal is enabled to be completely melted and fill the weld joint, and then a welded assembly is cooled down from the brazing temperature and the brazing filler metal is enabled to solidify.
The utility model also provides an aeroengine fuel nozzle, it includes as above the accurate pipeline of nested pipe in containing.
To sum up, the utility model discloses the accurate pipeline of nested pipe in containing and aeroengine fuel nozzle redesign the position and the shape of brazing filler metal groove, realized that the brazing filler metal fills completely to all welding seams, the brazing seam does not have defects such as hole and not welded, has guaranteed that the brazing seam quality accords with design operation requirement, provides technical support for the application of the accurate pipeline welded structure of nested pipe in containing in the aeroengine.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.
Claims (10)
1. A precision pipeline comprising an inner nested pipe, wherein the precision pipeline comprises a first pipeline main body, a second pipeline main body and the inner nested pipe, one end of the inner nested pipe is installed in the second pipeline main body, a plurality of material troughs are formed on the second pipeline main body, and the material troughs and the inner nested pipe are spaced;
the other end of the inner nested pipe is installed in the first pipeline main body, and the first pipeline main body and the second pipeline main body are buckled up and down and are welded into a whole.
2. The precision pipe comprising nested pipes according to claim 1, wherein the channel is a brazing channel.
3. The precision pipe comprising nested pipes according to claim 2, wherein the second pipe body is provided with a plurality of bosses, each boss surrounding a corresponding one of the nested pipes, and the brazing material channel is formed between each two adjacent bosses.
4. The precision pipe comprising nested pipes of claim 3, wherein the boss is rectangular, square, or circular.
5. The precision pipe comprising nested pipes according to claim 4, wherein the top end face of the boss abuts against the end face of the junction of the first pipe body.
6. The precision pipeline including inner nested tubes of claim 1, wherein one end of the inner nested tubes is in communication with the pipeline within the second pipeline body and the other end of the inner nested tubes is in communication with the pipeline within the first pipeline body.
7. A precision pipe comprising nested pipes according to claim 3 wherein the brazing filler metal is filled in the brazing filler metal channel.
8. The precision pipe comprising nested tubes as claimed in claim 7, wherein the brazing material is a paste brazing material.
9. The precision tube comprising nested tubes of claim 8, wherein the precision tube is fabricated using a brazing thermal cycle.
10. An aircraft engine fuel nozzle comprising a precision tube containing nested tubes as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121012.0U CN211524959U (en) | 2020-01-19 | 2020-01-19 | Precise pipeline containing inner nested pipe and aircraft engine fuel nozzle thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121012.0U CN211524959U (en) | 2020-01-19 | 2020-01-19 | Precise pipeline containing inner nested pipe and aircraft engine fuel nozzle thereof |
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| Publication Number | Publication Date |
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| CN211524959U true CN211524959U (en) | 2020-09-18 |
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| CN202020121012.0U Active CN211524959U (en) | 2020-01-19 | 2020-01-19 | Precise pipeline containing inner nested pipe and aircraft engine fuel nozzle thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114571117A (en) * | 2022-04-14 | 2022-06-03 | 无锡市润和机械有限公司 | Machining method for fuel nozzle assembly of aircraft engine |
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2020
- 2020-01-19 CN CN202020121012.0U patent/CN211524959U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114571117A (en) * | 2022-04-14 | 2022-06-03 | 无锡市润和机械有限公司 | Machining method for fuel nozzle assembly of aircraft engine |
| CN114571117B (en) * | 2022-04-14 | 2024-07-30 | 无锡市润和机械有限公司 | Method for machining fuel nozzle assembly of aero-engine |
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