CN113108135A - Arc-shaped butt joint vent conduit for airplane and manufacturing method thereof - Google Patents
Arc-shaped butt joint vent conduit for airplane and manufacturing method thereof Download PDFInfo
- Publication number
- CN113108135A CN113108135A CN202110330260.5A CN202110330260A CN113108135A CN 113108135 A CN113108135 A CN 113108135A CN 202110330260 A CN202110330260 A CN 202110330260A CN 113108135 A CN113108135 A CN 113108135A
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- Prior art keywords
- butt joint
- arc
- air
- manufacturing
- duct
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- 210000001503 joint Anatomy 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000009423 ventilation Methods 0.000 claims abstract description 34
- 238000003466 welding Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000003032 molecular docking Methods 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000002161 passivation Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention belongs to the field of large-scale airplane guide pipe manufacturing, and particularly relates to an arc-shaped butt joint port ventilation guide pipe for an airplane and a manufacturing method thereof, wherein the ventilation guide pipe is a butt joint air inlet and an air outlet with external arc-shaped surfaces; the butt joint side is an arc surface, and the other side is connected with the air duct; the air duct can be a straight conduit or a bent conduit and is connected with the butt joint by adopting a welding mode; the outer surfaces of the butt joint air inlet and the air outlet are provided with flange plates for butt joint; when in butt joint, the flange plate of the butt joint port is connected with the flange plate of the air duct port of the machine body through a bolt, so as to provide extrusion force for the butt joint surface; the butt joint surface and the matching surface are in interference fit and are in surface contact connection. The invention overcomes the defects of difficult control of the dimensional tolerance of the bell-mouth conduit, low assembly precision, long manufacturing period and the like. The method can reduce a large amount of input of labor cost, shorten the processing period of manufacturing and greatly improve the comprehensive use performance of parts.
Description
Technical Field
The invention belongs to the field of manufacturing of large airplane guide pipes, and relates to optimization of a ventilation guide pipe and a guide pipe butt joint structure and a manufacturing method thereof, which meet the requirements of improving the assembly precision and the use efficiency of parts.
Background
The air conditioning system of the airplane is characterized in that the safety and comfort of the airplane, airborne equipment and flight crew are guaranteed in flight, the air conditioning system is composed of an air source, cooling, heating, temperature control, cabin pressure regulation and air distribution, and the air conditioning system is mainly used for enabling parameters such as air pressure, temperature and composition in an airplane cabin to be suitable for human physiological requirements under various flight conditions (various flight speeds, heights and postures) and external environment conditions of the airplane.
The ventilation duct is the main connecting element of the air conditioning system of the aircraft, and the operating energy efficiency of the whole air conditioning system is influenced by the sealing degree of the ventilation duct. The ventilation duct is relatively complicated in distribution inside the aircraft, and the duct interface usually adopts the butt joint of horn mouth structural style, because this connection form receives the restriction of processing preparation, and horn mouth dimensional tolerance is difficult to control, and the formed part carries out the erection joint with the bulb, and its assembly precision has certain error.
In operation of an aircraft, the wings have some degree of up-and-down movement and ducts passing over the wings of the aircraft are affected by this movement. In order to accommodate this, the ventilation duct is usually assembled with some play at the interface junction, the bulb is provided with a rotation of a certain angle, and the duct then changes angle as the wing moves. However, when the amount of the clearance of the guide pipe to the interface is accumulated through tolerance, leakage can occur in the operation process, and energy consumption of an internal environment system of the airplane is lost.
And the bell mouth type ventilation duct is manufactured by a field sampling method, the process is complex, and more manpower and material resources are consumed.
Disclosure of Invention
1. Solves the technical problem
The size precision of a structural part is improved by optimizing and improving the design structure of the interface of the aircraft ventilation duct, the interface adopts a machining and vehicle-mounted real-time welding process to reduce the energy consumption and improve the manufacturing precision, and the phenomena of leakage and overflow easily occurring during assembly and use are reduced, so that the service efficiency and the service life of the aircraft air conditioning ventilation system are improved.
2. Technical scheme
It is therefore an object of the present invention to provide an apparatus and method that overcomes the deficiencies of the prior art.
According to an aspect of the present invention, there is provided an aircraft arc-shaped docking port ventilation duct comprising: a butt-joint air inlet and air outlet with external arc surfaces; the butt joint side is an arc surface, and the other side is connected with the air duct; the shape of the air duct can be designed into a straight conduit or can be in the shape of a bent pipe or other pipelines according to the use scene; the air duct is connected with the butt joint port in a welding mode; the outer surfaces of the butt joint air inlet and the air outlet are provided with flange plates for butt joint; when in butt joint, the flange plate of the butt joint port is connected with the flange plate of the air duct port of the machine body through a bolt, so as to provide extrusion force for the butt joint surface; the butt joint surface and the matching surface are in interference fit and are in surface contact connection.
Preferably, in the butt joint process, the torque parameters of the connecting bolts between the flanges are determined through a process test, so that the connection reliability is ensured, and the sealing performance is prevented from being influenced by the non-fitting of the assembly surface.
Preferably, the materials such as 0Cr18Ni9 and 2A12 are selected to form the interface ventilation duct assembly according to the requirements of airtight pressure.
Preferably, the surface roughness of the arc surface is improved, the fitting property of the butt joint surface is ensured, and the sealing effect is enhanced.
Preferably, the material of the arc-shaped attaching surface of the conduit is a material with good plastic deformation, so that a better sealing effect is ensured.
Preferably, gaskets are additionally arranged at the butting air inlet and the butting air outlet to enhance the butting sealing property.
The gasket adopts an anti-aging rubber gasket, and the hardness of the rubber gasket is selected from a soft series, so that the sealing property and interchangeability of the interface are enhanced by improving the deformation of the rubber, and the service life of the gasket is ensured.
Preferably, the air duct and the butt joint adopt a gas shielded welding process, so that stress concentration is reduced, and cracks are prevented.
According to another aspect of the present invention, there is provided a method of manufacturing an aircraft curved docking port ventilation duct, comprising:
step 1, designing an arc-shaped butt joint structure by a test method;
step 2, manufacturing an auxiliary clamp;
and 7, checking and repairing the whole welding seam of the ventilation conduit → correcting according to the requirement of the dimensional precision of the whole structure.
Preferably, the materials such as 0Cr18Ni9 and 2A12 are selected to form the interface ventilation duct assembly according to the requirements of airtight pressure.
Preferably, when the arc-shaped butt joint air inlet part and the arc-shaped butt joint air outlet part are turned, attention needs to be paid to temperature control below the overaging temperature so as to ensure that the performance and the organization of parts meet the requirements.
Preferably, the ventilation guide pipe is subjected to surface passivation treatment, so that the corrosion resistance is improved, and the service life is prolonged.
Preferably, the ovality of the catheter is not allowed within a length range of 50mm from the end of the catheter, and the ovality of the bend of the catheter is allowed to be 5%; for the bending radius smaller than three times of the nominal diameter of the guide pipe, the ovality at the bending part is allowed to reach 8 percent, and the assembly precision of the guide pipe is ensured to meet the requirement.
Preferably, the auxiliary clamp is manufactured to control the length deviation of the conduit, so that the manufacturing precision of the conduit is improved, and the subsequent assembly is facilitated, so that the final sealing effect is ensured.
Preferably, the proper fit clearance of the ventilation guide pipe and the sample plate is selected to meet the control on the offset of the central line of the sample plate and improve the assembly precision.
Preferably, the thickness gauge is used for detecting the thinning amount of the duct wall of the duct of the air duct, so that the duct is ensured to have enough rigidity, and the stability of the working state is ensured.
3. Advantageous effects
The invention provides a device and a manufacturing method thereof, wherein a new structure of an aircraft ventilation duct butt joint interface is designed by analyzing and optimizing a conventional duct, the interface adopts a machining and turning real-time welding process method to meet high requirements on use energy consumption and manufacturing precision, a large amount of investment of labor cost can be reduced, the manufacturing processing period is shortened, and the comprehensive use performance of parts is greatly improved, so that the popularization and the application of similar product conditions are facilitated.
Drawings
The invention comprises 3 figures, which are described as follows:
FIG. 1 is a schematic view of a flare vent conduit;
FIG. 2 is a schematic view of a docking interface connection;
FIG. 3 is a schematic view of an arcuate docking port vent conduit configuration;
wherein, 1-butt joint air inlet, 2-butt joint air outlet, 3-air duct, 4-flange plate, 5-air duct interface and 6-horn interface.
Detailed Description
The invention is described in detail with reference to the accompanying drawings:
referring to fig. 2, the embodiment of the present invention has the butt-joint air inlet and air outlet with the outer arc-shaped surfaces, and the material of the butt-joint air inlet and air outlet is 0Cr18Ni 9; the butt joint side is an arc surface, the out-of-roundness of the spherical surface is controlled to be 0.12, the surface roughness is 6.3, and the other side is connected with an air duct; the air duct can be a straight conduit or a bent conduit and is connected with the butt joint by adopting a welding mode; the outer surfaces of the butt-joint air inlet and the air outlet are provided with flange plates for butt joint, and the material is 2A 12; when in butt joint, the flange plate of the butt joint port is connected with the flange plate of the air duct port of the machine body through a bolt, so as to provide extrusion force for the butt joint surface; the butt joint surface and the matching surface are in interference fit and are in surface fit.
According to another aspect of the present invention, there is provided a method of manufacturing an aircraft curved docking port ventilation duct, comprising:
step 1, designing an arc-shaped butt joint structure by a test method. The materials such as 0Cr18Ni9 and 2A12 are selected to form the interface ventilation duct component according to the requirements of airtight pressure.
And 2, manufacturing an auxiliary clamp to control the length deviation of the ventilation guide pipe, improving the manufacturing precision of the ventilation guide pipe, and facilitating subsequent assembly so as to ensure the final sealing effect.
And 7, checking and repairing the whole welding seam of the ventilation conduit → correcting according to the requirement of the dimensional precision of the whole structure. And selecting a proper fit clearance between the ventilation guide pipe and the sample plate so as to meet the control on the offset of the central line of the sample plate and improve the assembly precision. The ventilation guide pipe is subjected to surface passivation treatment, so that the corrosion resistance is improved, and the service life is prolonged.
While specific embodiments of the present invention have been described above, it should be noted that the above embodiments are not all routine techniques in the art; the invention is not limited to the specific embodiments described above, wherein equipment and structures not described in detail are understood to be practiced in a manner common in the art; those skilled in the art can make various changes or modifications within the scope of the claims to make various simple deductions, changes or substitutions, such as the cutting parameters listed in the specification, and can slightly deviate in practical implementation without departing from the essence of the invention; such modifications are to be considered as falling within the scope of the present invention.
Claims (9)
1. An aircraft is with arc to interface ventilation pipe which characterized in that: the ventilation guide pipe is provided with a butt air inlet and an air outlet of an external arc-shaped surface, and the butt air inlet and the air outlet are respectively arranged at two ends of the air duct; wherein, the butt joint side of the butt joint air inlet and the air outlet is a circular arc surface, and the other side is connected with the air duct; the outer surfaces of the butt joint air inlet and the air outlet are provided with flange plates for butt joint; when in butt joint, the flange plate of the butt joint port is connected with the flange plate of the air duct port of the machine body through a bolt, so as to provide extrusion force for the butt joint surface; the butt joint surface and the matching surface are in interference fit and are in surface contact connection.
2. The curved docking port ventilation duct for an aircraft of claim 1, wherein: the surface roughness of the arc surface is improved.
3. The curved docking port ventilation duct for an aircraft according to claim 1 or 2, wherein: the material of the arc-shaped attaching surface of the catheter is selected from a material with good plastic deformation.
4. The curved docking port ventilation duct for an aircraft of claim 1, wherein: and gaskets are additionally arranged at the butted air inlet and the air outlet.
5. The curved docking port ventilation duct for an aircraft of claim 1, wherein: the air duct and the butt joint adopt a gas shielded welding process.
6. A method of manufacturing an aircraft curved docking port ventilation duct as defined in claim 1, wherein: the method comprises the following steps;
s1, designing an arc-shaped butt joint structure through a test method;
s2, manufacturing an auxiliary clamp;
s3, cutting an air duct according to the size specification;
s4, turning an arc-shaped butt joint air inlet part and an arc-shaped butt joint air outlet part
S5, welding the arc-shaped butt joint air inlet piece and the air channel: tack welding → correction deformation → grinding weld beading → cleaning up the weld;
s6, welding procedure of the air duct and the arc-shaped butt joint air outlet piece: tack welding → correction deformation → grinding weld beading → cleaning up the weld;
s7, cleaning and repairing the whole welding line of the ventilation duct → correcting according to the requirement of the size precision of the whole structure.
7. The manufacturing method according to claim 6, characterized in that: and in the step S4, when the arc-shaped butt joint air inlet part and the arc-shaped butt joint air outlet part are turned, the temperature is controlled below the overaging temperature.
8. The manufacturing method according to claim 6, characterized in that: and carrying out surface passivation treatment on the welded ventilation guide pipe.
9. The manufacturing method according to claim 6, characterized in that: the length range of the pipe end of the air duct is 50mm, the ovality of the guide pipe is not allowed, and the ovality of the bent part of the guide pipe is allowed to be 5%; ovality at the bend is allowed to 8% for bend radii less than three times the nominal diameter of the conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330260.5A CN113108135A (en) | 2021-03-26 | 2021-03-26 | Arc-shaped butt joint vent conduit for airplane and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330260.5A CN113108135A (en) | 2021-03-26 | 2021-03-26 | Arc-shaped butt joint vent conduit for airplane and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113108135A true CN113108135A (en) | 2021-07-13 |
Family
ID=76712648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110330260.5A Pending CN113108135A (en) | 2021-03-26 | 2021-03-26 | Arc-shaped butt joint vent conduit for airplane and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113108135A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007212A1 (en) * | 1990-10-10 | 1992-04-30 | Stainless Steel Products, Inc. | Duct joint link assembly |
| KR20050007122A (en) * | 2003-07-10 | 2005-01-17 | 김민철 | Pipe connect |
| US20050258642A1 (en) * | 2003-03-31 | 2005-11-24 | Brophy Lawrence J Iii | Exhaust pipe joint and seal |
| CN104121440A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | High-temperature pipeline connecting structure on plane |
| CN106624639A (en) * | 2016-12-09 | 2017-05-10 | 广西建工集团第五建筑工程有限责任公司 | Manufacturing and hoisting method for pre-spliced short joint of large valve and large-diameter pipeline |
| CN107617857A (en) * | 2017-10-26 | 2018-01-23 | 十四冶建设集团云南安装工程有限公司 | Heavy crossed steel column makes engineering method |
| CN112325014A (en) * | 2020-11-02 | 2021-02-05 | 杭州中瑞瑞泰克复合材料有限公司 | Air pipe assembling method and air pipe assembling structure based on cold-bending formed flange |
-
2021
- 2021-03-26 CN CN202110330260.5A patent/CN113108135A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007212A1 (en) * | 1990-10-10 | 1992-04-30 | Stainless Steel Products, Inc. | Duct joint link assembly |
| US20050258642A1 (en) * | 2003-03-31 | 2005-11-24 | Brophy Lawrence J Iii | Exhaust pipe joint and seal |
| KR20050007122A (en) * | 2003-07-10 | 2005-01-17 | 김민철 | Pipe connect |
| CN104121440A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | High-temperature pipeline connecting structure on plane |
| CN106624639A (en) * | 2016-12-09 | 2017-05-10 | 广西建工集团第五建筑工程有限责任公司 | Manufacturing and hoisting method for pre-spliced short joint of large valve and large-diameter pipeline |
| CN107617857A (en) * | 2017-10-26 | 2018-01-23 | 十四冶建设集团云南安装工程有限公司 | Heavy crossed steel column makes engineering method |
| CN112325014A (en) * | 2020-11-02 | 2021-02-05 | 杭州中瑞瑞泰克复合材料有限公司 | Air pipe assembling method and air pipe assembling structure based on cold-bending formed flange |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210713 |