CN114526919A - Test method and tool for verifying strength of special-shaped jet pipe of aircraft engine - Google Patents
Test method and tool for verifying strength of special-shaped jet pipe of aircraft engine Download PDFInfo
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- CN114526919A CN114526919A CN202210158913.0A CN202210158913A CN114526919A CN 114526919 A CN114526919 A CN 114526919A CN 202210158913 A CN202210158913 A CN 202210158913A CN 114526919 A CN114526919 A CN 114526919A
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- 238000010998 test method Methods 0.000 title claims description 8
- 239000007921 spray Substances 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 238000004088 simulation Methods 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
Abstract
The inlet of the special-shaped spray pipe is fixedly connected with the air source pipeline of the tester through the adapter section, the inner runner surface of the outlet of the spray pipe is provided with the baffle, the baffle and the outlet of the inner runner surface are in sleeve joint and have a sleeve joint gap, airflow with certain temperature and flow of the tester flows in from the inlet of the adapter section and flows out from the sleeve joint gap, and the static pressure of the air on the inner wall surface of the casing is increased due to the blockage of the runner caused by the sharp reduction of the sectional area of the runner. A pressure sensing device is arranged on the switching section to measure the static pressure on the inner wall of the switching section, and a tester is used for adjusting the flow in the pipeline to control the wall static pressure, so that the special-shaped casing pressure strength test is realized. Compared with the prior art, the invention has wide application range, is suitable for the pressurizing test of the single-mounting-side structure spray pipe, and can replace the traditional sealing cavity liquid pressurizing test. The test tool is simple in structure, convenient to process, easy to assemble, low in cost and high in practicability.
Description
Technical Field
The invention relates to the technical field of aero-engine casing pressure tests, in particular to a test method and a tool for verifying the strength of an aero-engine special-shaped spray pipe.
Background
The special-shaped spray pipe has poor pressure bearing capacity, and the strength test of the special-shaped spray pipe needs to be carried out to determine the reasonability of the design in order to verify whether the structural design of the special-shaped spray pipe meets the strength use requirement.
The conventional compression test method is to fixedly connect the adapter sections at two ends of a typical casing to form a closed cavity with the typical casing, and to compress by injecting water or oil with a certain pressure.
Unlike a typical casing, the special-shaped spray pipe only has a mounting edge structure at an inlet and can be fixedly connected with the adapter section, and does not have a mounting edge structure at an outlet, so that a conventional pressing test method cannot be adopted.
Disclosure of Invention
The invention mainly aims to provide a test method and a tool for verifying the strength of a special-shaped spray pipe of an aero-engine, and aims to solve the technical problems.
In order to achieve the above object, in one aspect, the invention provides a test tool for verifying the strength of a special-shaped spray pipe of an aircraft engine, which comprises a switching section and a baffle plate; one end of the switching section is used for being connected with the air inlet end of the special-shaped spray pipe, and the other end of the switching section is used for being connected with an air source pipeline of the tester; the baffle is sleeved on the inner runner surface of the outlet of the special-shaped spray pipe; a sleeving gap is formed between the peripheral profile of the baffle and the inner runner surface of the outlet of the special-shaped spray pipe; the baffle is installed on the support.
Preferably, the sleeving gap is 3 mm-8 mm.
Preferably, the axial length of a sleeving connection area between the baffle and the outlet of the special-shaped spray pipe is 1-2 mm.
Preferably, the adapter section comprises an adapter casing and a simulation casing; the adapter casing and the simulation casing are connected by a flange edge structure and a bolt; the simulation casing is connected with the mounting edge of the special-shaped spray pipe.
Preferably, a front mounting edge is arranged at the front end of the adapter casing and used for being connected with an air source pipeline interface of the tester.
Preferably, a pressure sensing device is arranged inside the adapter section and used for measuring the static pressure on the inner wall of the casing.
Preferably, the back of the baffle is provided with a reinforcing rib and a connecting plate; the support comprises a square plate, a vertical beam and a bottom plate; the bottom plate is arranged at the lower end of the vertical beam, and the square plate is arranged at the upper end of the vertical beam; the bottom plate is used for being fixedly connected with the bottom surface, and the square plate is connected with the connecting plate.
Preferably, the baffle is made of stainless steel, and the thickness of the baffle is not less than 20 mm.
Preferably, the reinforcing ribs are of a cross structure and play a role in reinforcing in the transverse direction and the longitudinal direction.
On the other hand, the invention also provides a test method for verifying the strength of the special-shaped jet pipe of the aircraft engine, which is characterized by comprising the following steps of:
step S1: preparing a baffle plate, wherein a gap between the peripheral molded surface of the baffle plate and the inner runner surface of the outlet of the special-shaped spray pipe is 3-8 mm;
step S2: connecting the adapter casing to an air source pipeline interface of the tester, then installing the simulation casing on the adapter casing, and installing the special-shaped spray pipe on the simulation casing;
step S3: installing the baffle on the support, adjusting the position of the support to enable the baffle to be sleeved on the inner runner surface of the special-shaped spray pipe outlet, enabling the sleeving gap between the peripheral profile of the baffle and the inner runner surface of the special-shaped spray pipe outlet to be uniform, and then fixing the support on the ground;
step S4: the tester is used for ventilating and pressurizing, the static pressure is measured through a pressure sensing device arranged in the switching casing or the simulation casing, the static pressure of the wall surface of the special-shaped spray pipe can be controlled by adjusting the flow in the pipeline through the tester, and therefore the pneumatic pressurizing strength test of the special-shaped spray pipe is achieved.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the inlet of the special-shaped spray pipe is fixedly connected with the air source pipeline of the tester through the adapter section, the inner runner surface of the outlet of the spray pipe is provided with the baffle, the baffle and the outlet of the inner runner surface are in sleeve joint and have a sleeve joint gap, airflow with certain temperature and flow of the tester flows in from the inlet of the adapter section and flows out from the sleeve joint gap, and the static pressure of the air on the inner wall surface of the casing is increased due to the blockage of the runner caused by the sharp reduction of the sectional area of the runner. A pressure sensing device is arranged on the switching section to measure the static pressure on the inner wall of the switching section, and the tester is used for adjusting the flow in the pipeline to control the static pressure on the wall surface, so that the special-shaped casing pressing strength test is realized.
(2) Compared with the prior art, the invention has wide application range, is suitable for the pressure test of the single-installation-side structure spray pipe, and can also replace the traditional liquid pressure test of the sealed cavity. The test tool is simple in structure, convenient to process, easy to assemble, low in cost and high in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described 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 the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a test tool for verifying the strength of an aircraft engine special-shaped nozzle provided by the invention;
fig. 2 is a schematic structural diagram of an adapter casing in the test tool provided by the present invention;
FIG. 3 is a schematic structural diagram of a simulation case in the test tool according to the present invention;
FIG. 4 is a schematic structural diagram of a baffle plate in the test fixture provided by the present invention;
FIG. 5 is a schematic view of a test gas flow path;
the reference numbers illustrate: 1-a special-shaped spray pipe; 2-a switching section; 21-a transfer case; 211-front mounting edge; 22-simulation of the casing; 3-a baffle plate; 301-reinforcing ribs; 302-connecting plate; 4-a scaffold; 401-square plate; 402-vertical beam; 403-bottom plate.
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. 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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
As shown in FIG. 1, the test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine comprises an adapting section 2 and a baffle 3; one end of the switching section 2 is used for being connected with the air inlet end of the special-shaped spray pipe 1, and the other end of the switching section is used for being connected with an air source pipeline of the tester; the baffle 3 is sleeved on the inner runner surface of the outlet of the special-shaped spray pipe 1; a sleeving gap is formed between the peripheral profile of the baffle 3 and the inner runner surface of the outlet of the special-shaped spray pipe 1; the baffle 3 is mounted on a support 4. A pressure sensing device is arranged inside the switching section 2.
As shown in fig. 1 and 5, the sleeving gap is 3mm to 8 mm. The axial length of a sleeving area between the baffle 3 and the outlet of the special-shaped spray pipe 1 is 1-2 mm.
As shown in fig. 1, the adaptor section 2 includes an adaptor casing 21 and a simulation casing 22; the adapter casing 21 and the simulation casing 22 are connected by a flange structure and bolts; the simulation casing 22 is connected with the mounting edge of the special-shaped spray pipe 1. The front end of the adapter casing 21 is provided with a front mounting edge 211, and the front mounting edge 211 is used for being connected with an air source pipeline interface of the tester.
As shown in fig. 1, a rib 301 and a connecting plate 302 are provided on the back of the baffle 3; the support 4 comprises a square plate 401, a vertical beam 402 and a bottom plate 403; the bottom plate 403 is arranged at the lower end of the vertical beam 403, and the square plate 401 is arranged at the upper end of the vertical beam 403; the bottom plate 403 is used for being fixedly connected with the bottom surface, and the square plate 401 is connected with the connecting plate 302.
The function of the adapter casing 21 is to connect the simulation casing 22 and the air source pipeline of the tester, the strength and rigidity are obviously higher than those of the simulation casing 22, the material of the adapter casing 21 is stainless steel, the thickness of the front mounting edge 211 is 40mm, the thickness of the shell of the adapter casing 21 is 15mm, the thickness of the flange edge connected with the simulation casing 22 is 10mm, and the flow channel and the mounting size need to be consistent with the pipeline interface of the tester and the interface of the simulation casing 22. The adapter casing 21 can be manufactured by casting, machining, welding and other traditional processing modes, and can also be manufactured by adopting a novel laser additive manufacturing method.
The baffle 3 acts to block the gas flow and withstand greater gas pressure. The baffle 3 is made of stainless steel, the thickness of the baffle is not less than 20mm, the back of the baffle is provided with cross-shaped reinforcing ribs 301 for improving the transverse and longitudinal strength of the baffle 3, the thickness of the reinforcing ribs 301 is 30mm, and the height of the reinforcing ribs is 50 mm. Rear end connecting plate 302 is square plate-like structure, and the effect is to carry out fixed connection with square board 401 of support 4, and connecting plate 302 length of side is 200mm, and thickness 25mm, baffle 3, strengthening rib 301 and connecting plate 302 can adopt traditional processing methods such as casting, machine and add, welding to make.
The bracket 4 is used for fixing and supporting the baffle 3, and the material of the bracket 4 is stainless steel. The square board 401 in upper end is used for connecting with baffle 3's connecting plate 302 fixed connection, and square board 401 length of side is 200mm, and thickness is 25 mm. The bottom plate 403 is a disc with the diameter of 300mm and the thickness of 40mm, is fixed on the ground or a fixing device on the ground, and can adjust the disc structure through a visual connecting interface. The vertical beam 402 is a rectangular beam structure with a width of 100mm and a thickness of 50 mm. The bracket 4 can be manufactured by traditional processing modes such as casting, machining, welding and the like.
On the other hand, the test method for verifying the strength of the special-shaped jet pipe of the aircraft engine adopts the test tool to perform the strength test, and comprises the following steps:
step S1: preparing a baffle 3, wherein a gap between the peripheral profile of the baffle 3 and the inner runner surface of the outlet of the special-shaped spray pipe 1 is 3-8 mm;
step S2: connecting the adapter casing 21 to an air source pipeline interface of the tester, then installing the simulation casing 22 on the adapter casing 21, and installing the special-shaped spray pipe 1 on the simulation casing 22;
step S3: installing the baffle 3 on the support 4, adjusting the position of the support 4 to enable the baffle 3 to be sleeved on the inner flow channel surface of the outlet of the special-shaped spray pipe 1, enabling the sleeving gap between the peripheral molded surface of the baffle 3 and the inner flow channel surface of the outlet of the special-shaped spray pipe 1 to be uniform, and then fixing the support 4 on the ground;
step S4: the tester is used for ventilating and pressurizing, the static pressure is measured through a pressure sensing device arranged in the switching casing 21 or the simulation casing 22, the static pressure of the wall surface of the special-shaped spray pipe 1 can be controlled by adjusting the flow in the pipeline through the tester, and therefore the pneumatic pressurizing strength test of the special-shaped spray pipe 1 is achieved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A test tool for verifying the strength of an aircraft engine special-shaped spray pipe is characterized by comprising a switching section (2) and a baffle (3);
one end of the switching section (2) is used for being connected with the air inlet end of the special-shaped spray pipe (1), and the other end of the switching section is used for being connected with an air source pipeline of the tester;
the baffle (3) is sleeved on the inner runner surface of the outlet of the special-shaped spray pipe (1); a sleeving gap is formed between the peripheral molded surface of the baffle (3) and the inner runner surface of the outlet of the special-shaped spray pipe (1);
the baffle (3) is arranged on the bracket (4).
2. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: the sleeving gap is 3-8 mm.
3. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: the axial length of a sleeving area between the baffle (3) and the outlet of the special-shaped spray pipe (1) is 1-2 mm.
4. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: the adapter section (2) comprises an adapter casing (21) and a simulation casing (22);
the adapter casing (21) and the simulation casing (22) are connected by a flange structure through bolts;
the simulation casing (22) is connected with the mounting edge of the special-shaped spray pipe (1).
5. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 4, wherein the test tool comprises: the front end of the adapter casing (21) is provided with a front mounting edge (211), and the front mounting edge (211) is used for being connected with an air source pipeline interface of the tester.
6. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: and a pressure sensing device is arranged in the switching section (2).
7. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: a reinforcing rib (301) and a connecting plate (302) are arranged on the back of the baffle (3); the support (4) comprises a square plate (401), a vertical beam (402) and a bottom plate (403); the bottom plate (403) is provided with the lower end of the vertical beam (403), and the square plate (401) is arranged at the upper end of the vertical beam (403); the bottom plate (403) is used for being fixedly connected with the bottom surface, and the square plate (401) is connected with the connecting plate (302).
8. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 1, wherein the test tool comprises: the baffle (3) is made of stainless steel, and the thickness of the baffle is not less than 20 mm.
9. The test tool for verifying the strength of the special-shaped jet pipe of the aircraft engine as claimed in claim 7, wherein the test tool comprises: the reinforcing ribs (301) are of a cross-shaped structure.
10. A test method for verifying the strength of a special-shaped jet pipe of an aircraft engine is characterized by comprising the following steps:
step S1: preparing a baffle (3), wherein a gap between the peripheral molded surface of the baffle (3) and the inner runner surface of the outlet of the special-shaped spray pipe (1) is 3-8 mm;
step S2: connecting the switching casing (21) to an air source pipeline interface of the tester, then installing the simulation casing (22) on the switching casing (21), and installing the special-shaped spray pipe (1) on the simulation casing (22);
step S3: installing the baffle (3) on the support (4), adjusting the position of the support (4) to enable the baffle (3) to be sleeved on the inner flow channel surface of the outlet of the special-shaped spray pipe (1), enabling the sleeving gap between the peripheral molded surface of the baffle (3) and the inner flow channel surface of the outlet of the special-shaped spray pipe (1) to be uniform, and then fixing the support (4) on the ground;
step S4: the tester is used for ventilating and pressurizing, the static pressure is measured by a pressure sensing device arranged in the switching casing (21) or the simulation casing (22), the static pressure of the wall surface of the special-shaped spray pipe (1) can be controlled by adjusting the flow in the pipeline by using the tester, and therefore the pneumatic pressurizing strength test of the special-shaped spray pipe (1) is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210158913.0A CN114526919A (en) | 2022-02-21 | 2022-02-21 | Test method and tool for verifying strength of special-shaped jet pipe of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210158913.0A CN114526919A (en) | 2022-02-21 | 2022-02-21 | Test method and tool for verifying strength of special-shaped jet pipe of aircraft engine |
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| Publication Number | Publication Date |
|---|---|
| CN114526919A true CN114526919A (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210158913.0A Pending CN114526919A (en) | 2022-02-21 | 2022-02-21 | Test method and tool for verifying strength of special-shaped jet pipe of aircraft engine |
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| CN (1) | CN114526919A (en) |
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2022
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