CN108731907B - Composite measuring rake - Google Patents
Composite measuring rake Download PDFInfo
- Publication number
- CN108731907B CN108731907B CN201811034708.3A CN201811034708A CN108731907B CN 108731907 B CN108731907 B CN 108731907B CN 201811034708 A CN201811034708 A CN 201811034708A CN 108731907 B CN108731907 B CN 108731907B
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- China
- Prior art keywords
- rake
- measuring point
- embedded part
- measuring
- plug
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 210000001503 joint Anatomy 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000001052 transient effect Effects 0.000 claims abstract description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 8
- 239000004917 carbon fiber Substances 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- 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
- G01M15/02—Details or accessories of testing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a composite measuring rake, and relates to the field of aeroengines. The measuring rake is used for solving the problems that the existing measuring rake made of steel and rubber composite materials is large in self weight and replaceable in temperature measuring points and dynamic pressure measuring points. The measuring rake includes: a rake main body, an embedded part and a plug part which are prepared from carbon fiber composite materials; the embedded part is arranged in the rake body, and the plug part is arranged at the tail end of the rake body; one end of the embedded part, which is far away from the rake body, is provided with a measuring point group, and the measuring point group is respectively communicated with a wiring pipe, which penetrates through the embedded part and extends into the rake body to be in butt joint with the plug part; the measuring point group is used for testing the transient temperature and the air flow pressure of the air flow.
Description
Technical Field
The invention relates to the field of aeroengines, in particular to a composite measuring rake.
Background
In the flight test, the temperature and pressure parameters at the outlet of the air inlet channel/the inlet of the engine provide important information for evaluating the performance of the engine, and the measuring harrow is used as test auxiliary equipment and is arranged at the position to be tested so as to acquire relevant test parameters, and the quality of the flow field is evaluated by measurement.
According to the requirement of large-size air inlet channel measurement, 8 measuring rakes are generally required to be arranged in a shape of a meter at equal angles in the circumferential direction, and besides the requirement that the flow channel blocking ratio of the rake body is less than or equal to 6%, the requirements on the weight of the measuring rakes and the compounding of test parameters are also increasing.
The weight of a single harrow is about 3.5Kg, and test points mainly comprise parameters such as steady-state total pressure, dynamic total pressure, steady-state temperature and the like. The weight of the harrow is reduced by 53.3 percent compared with that of a full metal harrow, and the measurement harrow adopting the steel-rubber composite material has the problems of larger self weight and difficult replacement of the measuring point along with the use of the composite material at an engine air inlet.
Disclosure of Invention
The embodiment of the invention provides a composite measuring rake, which is used for solving the problems that the existing measuring rake adopting a steel-rubber composite material has large self weight and the measuring point is replaceable.
The embodiment of the invention provides a composite measuring rake, which comprises: a rake main body, an embedded part and a plug part which are prepared from carbon fiber composite materials;
the embedded part is arranged in the rake body, and the plug part is arranged at the tail end of the rake body;
one end of the embedded part, which is far away from the rake body, is provided with a measuring point group, and the measuring point group is respectively communicated with a wiring pipe, which penetrates through the embedded part and extends into the rake body to be in butt joint with the plug part; the measuring point group is used for testing the transient temperature and the air flow pressure of the air flow.
Further, the plug assembly comprises a total pressure extension pipe, an aviation plug and a quick connector;
a total pressure measuring point, a dynamic pressure measuring point and a temperature measuring point are arranged at one end of the embedded part far away from the rake body, and a wiring pipe which is respectively communicated with the dynamic pressure measuring point and the temperature measuring point penetrates through the embedded part, extends into the rake body and is in butt joint with the aviation plug; the metal pipe communicated with the total pressure measuring point penetrates through the embedded part and extends into the harrow body to be in butt joint with the quick connector through the total pressure extension pipe; the temperature measuring point is used for measuring the transient temperature of the gas, and the total pressure measuring point and the dynamic pressure measuring point are used for measuring the pressure of the gas.
Further, the wiring pipes comprise two wiring pipes, and each wiring pipe is used for setting the sensor wiring of the dynamic pressure measuring point and the temperature measuring point.
Further, the metal pipe and the embedded part are welded together.
Further, the total pressure extension pipe is made of polyurethane.
Further, the rake further comprises a sealing cover, wherein the sealing cover is arranged on one side of the plug piece away from the rake body.
The embodiment of the invention provides a composite measuring rake, which comprises: a rake main body, an embedded part and a plug part which are prepared from carbon fiber composite materials; the embedded part is arranged in the rake body, and the plug part is arranged at the tail end of the rake body; one end of the embedded part, which is far away from the rake body, is provided with a measuring point group, and the measuring point group is respectively communicated with a wiring pipe, which penetrates through the embedded part and extends into the rake body to be in butt joint with the plug part; the measuring point group is used for testing the transient temperature and the air flow pressure of the air flow. The composite measuring rake provided by the embodiment of the invention adopts the carbon fiber composite material as the main body material of the rake, and compared with the steel and rubber composite material measuring rake, the composite measuring rake has better overall strength and weight reduction of about 63%; furthermore, the butt joint pipe of the plug piece and the embedded piece is led into the rake main body, so that the use and installation efficiency of the measuring rake is improved, and the measuring rake can be conveniently carried through the arrangement.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a measurement rake structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sensing part of a measuring rake according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a tail structure of a measurement rake according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a measurement rake according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic structural diagram of a measurement rake according to an embodiment of the present invention, as shown in fig. 1, the measurement rake mainly includes a rake body 1 made of a carbon fiber composite material, an embedded part 7 and a plug part.
Specifically, the embedded part 7 is provided at the top end portion of the rake body 1, and correspondingly, the plug part is provided at the tail end portion of the rake body 1. In the embodiment of the invention, the embedded part 7 is a metal part, a measuring point group is arranged at one end of the embedded part 7 far away from the rake body 1, a plurality of wiring pipes which are respectively communicated with the measuring point group are arranged in the embedded part 7, and the wiring pipes extend into the rake body 1 to be in butt joint with the plug part through the embedded part 7. By the arrangement, the butt joint pipe of the plug piece and the embedded piece 7 can be introduced into the rake body 1, so that the transient temperature and the air flow pressure of the air flow can be tested. The arrangement structure provided by the embodiment of the invention can improve the utilization rate and the installation efficiency of the measuring harrow. Further, through the arrangement, the measuring rake can be conveniently carried, and other measuring pieces are prevented from being carried for many times.
Fig. 2 is a schematic diagram of a sensing portion structure of a measurement rake according to an embodiment of the present invention, and fig. 3 is a schematic diagram of a tail portion structure of a measurement rake according to an embodiment of the present invention. In practical application, the number of the measurement point groups arranged on the embedded part 7 can be multiple, and each measurement point included in each measurement point group can be provided with a corresponding measurement part and a data line connected with the measurement part according to practical needs. As shown in fig. 2, in the embodiment of the present invention, the measurement point group includes a total pressure measurement point 4, a dynamic pressure measurement point 5 and a temperature measurement point 6. As shown in fig. 1 and 3, the plug assembly includes a total pressure extension pipe 8, an aerial plug 3 and a quick connector 9.
Specifically, a wiring pipe communicated with the dynamic pressure measuring point 5 and the temperature measuring point 6 is arranged in the embedded part 7, and in the embodiment of the invention, the wiring pipe penetrates through the embedded part 7 to extend into the rake body 1, and furthermore, the wiring pipe extending to the rake body 1 penetrates through the rake body 1 to the tail end of the rake body 1. Further, the sensor cables respectively connected with the dynamic pressure measuring point 5 and the temperature measuring point 6 are in butt joint with the aviation plug 3 arranged at the tail end of the rake body 1 through the wiring pipes.
In the embodiment of the invention, the measuring point group further comprises a total pressure measuring point 4, and a metal pipe communicated with the total pressure measuring point 4, like a wiring pipe, also penetrates through the embedded part 7 to extend to the rake body 1, and meanwhile, the metal pipe extending to the rake body 1 also penetrates through the rake body 1 to the tail end of the rake body 1. The metal tube and the embedded part 7 are welded together. In the embodiment of the invention, the plug member comprises a total pressure extension tube 8 with one end abutting the metal tube and the other end being connected to the quick connector 9. In order to facilitate the butt joint of the total pressure extension pipe and the metal pipe, in the embodiment of the invention, the total pressure extension pipe is a polyurethane pipe.
As shown in fig. 1, after the embedded part 7 and the plug part are abutted on the rake body 1, a sealing cover made of rust-proof aluminum is further arranged on the plug part.
In practical application, when the test rake is used for testing, the temperature measuring point 6 is used for measuring the transient temperature of the air flow, and the total pressure measuring point 4 and the dynamic pressure measuring point 5 are used for measuring the pressure of the air pressure; when the aviation plug 3, the total pressure extension pipe 8 is connected with the corresponding connector of the test equipment on the embedded part 7, the collection of related data can be completed.
FIG. 4 is a schematic diagram of each section of a measuring rake according to an embodiment of the present invention, as shown in FIG. 4, in order to reduce the resistance of the measuring rake to airflow, the rake body 1 has an airfoil design at the section A-A and the section B-B; in order to match with the reserved hole of the air inlet channel of the rake body 1, the C-C section is an oblong boss.
The embodiment of the invention provides a composite measuring rake, which comprises: a rake main body, an embedded part and a plug part which are prepared from carbon fiber composite materials; the embedded part is arranged in the rake body, and the plug part is arranged at the tail end of the rake body; one end of the embedded part, which is far away from the rake body, is provided with a measuring point group, and the measuring point group is respectively communicated with a wiring pipe, which penetrates through the embedded part and extends into the rake body to be in butt joint with the plug part; the pressure measuring and temperature measuring sensors arranged on the measuring point group are repairable and are used for testing the transient temperature and the air flow pressure of the air flow. The composite measuring rake provided by the embodiment of the invention adopts the carbon fiber composite material as the main body material of the rake, and compared with the steel and rubber composite material measuring rake, the composite measuring rake has better overall strength and weight reduction of about 63%; furthermore, the butt joint pipe of the plug piece and the embedded piece is introduced into the rake body, so that the use and installation efficiency of the measuring rake is improved, the maintainability of the temperature measuring point and the dynamic pressure measuring point is improved, and the measuring rake can be conveniently carried through the arrangement.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. A composite measurement rake, comprising: a rake main body, an embedded part, a plug part and a sealing cover which are prepared from carbon fiber composite materials;
the embedded part is arranged in the rake body, and the plug part is arranged at the tail end of the rake body;
a measuring point group is arranged at one end of the embedded part far away from the rake body, and wiring pipes respectively communicated with the measuring point group penetrate through the embedded part and extend into the rake body to be in butt joint with the plug part; the measuring point group is used for testing the transient temperature and the air flow pressure of the air flow;
the sealing cover is arranged on one side of the plug piece, which is far away from the rake body;
the plug piece comprises a total pressure extension pipe, an aviation plug and a quick connector;
a total pressure measuring point, a dynamic pressure measuring point and a temperature measuring point are arranged at one end of the embedded part far away from the rake body, and a wiring pipe which is respectively communicated with the dynamic pressure measuring point and the temperature measuring point penetrates through the embedded part, extends into the rake body and is in butt joint with the aviation plug; a metal pipe communicated with the total pressure measuring point penetrates through the embedded part and extends into the rake main body to be in butt joint with the quick connector through the total pressure extension pipe; the temperature measuring point is used for measuring the transient temperature of the gas, and the total pressure measuring point and the dynamic pressure measuring point are used for measuring the pressure of the gas.
2. The measurement rake of claim 1, wherein the trace tubes include two and each trace tube is used to set sensor traces for the dynamic pressure measurement point and the temperature measurement point, respectively.
3. The rake of claim 1, wherein said metal tube is welded to said embedment.
4. The rake according to claim 1, wherein the total extension tube is made of polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811034708.3A CN108731907B (en) | 2018-09-05 | 2018-09-05 | Composite measuring rake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811034708.3A CN108731907B (en) | 2018-09-05 | 2018-09-05 | Composite measuring rake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108731907A CN108731907A (en) | 2018-11-02 |
| CN108731907B true CN108731907B (en) | 2024-02-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811034708.3A Active CN108731907B (en) | 2018-09-05 | 2018-09-05 | Composite measuring rake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108731907B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341775A (en) * | 2018-11-12 | 2019-02-15 | 中国飞行试验研究院 | A kind of anti-big overload air intake duct combined distortion measurement rake |
| CN110441023B (en) * | 2019-07-30 | 2022-07-29 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Miniature measurement rake for wind tunnel test and 3D printing method thereof |
| CN111551339B (en) * | 2020-04-28 | 2021-10-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Design method of special pressure measuring rake for deformed flow channel of wing-body fusion aircraft ventilation model |
| CN112378715B (en) * | 2020-11-29 | 2022-04-05 | 同济大学 | A water-cooled gas sampling rake |
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| CN108731907A (en) | 2018-11-02 |
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