CN108709576B - Harrow type instrument test structure - Google Patents
Harrow type instrument test structure Download PDFInfo
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- CN108709576B CN108709576B CN201810581031.9A CN201810581031A CN108709576B CN 108709576 B CN108709576 B CN 108709576B CN 201810581031 A CN201810581031 A CN 201810581031A CN 108709576 B CN108709576 B CN 108709576B
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- instrument
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- rake
- meter
- rake type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- General Physics & Mathematics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to the technical field of aero-engine experimental tests, in particular to a rake type instrument, which comprises: an instrument strut; and a plurality of meter measuring points are uniformly distributed at one end of the meter supporting rod along an arc with the radius of R1, and R1 is equal to the radius of the rake type meter testing position. The rake type instrument has the advantages that the instrument measuring points are distributed in an arc shape, the arc radius of the instrument measuring points is equal to the radius of the position of the rake type instrument to be measured, so that the test error caused by radial change of the instrument measuring points in a flow channel is eliminated, the accuracy of test data is improved, and a reliable basis is provided for performance evaluation of an aircraft engine, a fan/compressor and a turbine.
Description
Technical Field
The invention relates to the technical field of experimental tests of aero-engines, in particular to a rake type instrument test structure.
Background
The rake type test instrument can simultaneously complete the measurement of parameters within a grid distance range at one time, so that the rake type instrument is frequently used for temperature and pressure tests in aero-engines, fans/compressors and turbine tests.
The distribution of the rake type instrument measuring points on the current engineering is in-line distribution, so that in the test, parameters of an aircraft engine, a fan/compressor and a turbine within a grid distance range are measured by using the rake type instrument measuring points, and the obtained test data of each measuring point cannot eliminate test errors caused by radial change of the instrument measuring points in a flow channel.
Disclosure of Invention
The object of the present invention is to provide a solution to the above mentioned problems.
The technical scheme of the invention is as follows:
a rake meter comprising:
an instrument strut;
and a plurality of instrument measuring points are uniformly distributed at one end of the instrument supporting rod along an arc with the radius of R1, and R1 is equal to the radius of the rake-type instrument testing position.
Preferably, the rake type meter further includes: the instrument mounting seat is provided with a through hole, one end of the instrument supporting rod, which is back to the instrument measuring point, is arranged in the through hole, the surface of one side, which faces the instrument measuring point, of the instrument mounting seat is in an arc shape with the radius of R2, and the length of the instrument supporting rod between the instrument measuring point and the instrument mounting seat is L; wherein the content of the first and second substances,
r2 is equal to the radius of the inner surface of the measurement flow channel of the rake type instrument;
l is equal to the distance from the test position of the rake meter to the inner surface of the measurement flow channel.
The rake type instrument has the advantages that the rake type instrument is provided, the instrument measuring points of the rake type instrument are distributed in an arc shape, the radius of the arc shape is equal to the radius of the position to be tested of the rake type instrument, therefore, the test error caused by the radial change of the instrument measuring points in a flow channel is eliminated, the accuracy of test data is improved, and a reliable basis is provided for the performance evaluation of an aircraft engine, a fan/compressor and a turbine.
Drawings
Fig. 1 is a schematic structural view of the rake type meter of the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
The present invention is described in further detail below with reference to fig. 1.
The present invention provides a rake-type instrument, comprising:
an instrument strut 1;
a plurality of instrument measuring points 2 are uniformly distributed at one end of an instrument supporting rod 1 along an arc with the radius of R1, and R1 is equal to the radius of a rake type instrument testing position.
Further, the rake type meter further includes: the instrument mounting seat 3 is provided with a through hole, one end of the instrument strut 1, which is back to the instrument measuring point, is arranged in the through hole, the surface of one side of the instrument mounting seat 3, which faces the instrument measuring point 2, is in an arc shape with the radius of R2, and the length of the instrument strut 1 between the instrument measuring point 2 and the instrument mounting seat 3 is L; wherein the content of the first and second substances,
r2 is equal to the radius of the inner surface of the measurement flow channel of the rake type instrument;
l is equal to the distance from the test position of the rake meter to the inner surface of the measurement flow channel.
The side surface of the instrument mounting seat 3 facing the instrument measuring point 1 is designed to be arc-shaped, the radius of the arc-shaped is equal to the radius of the inner surface of the rake-shaped instrument measuring flow channel, and after the rake-shaped instrument is mounted, the inner surface of the instrument mounting seat 3 is flush with the inner surface of the measuring flow channel, so that the interference of the deviation of the instrument mounting seat 3 and the inner surface of the flow channel on a test flow field is avoided, and the accuracy and the reliability of the rake-shaped instrument test are improved.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (1)
1. A rake meter, comprising:
an instrument strut;
a plurality of meter measuring points are uniformly distributed at one end of the meter supporting rod along an arc with the radius of R1, and R1 is equal to the radius of the rake-type meter testing position; further comprising:
the instrument mounting seat is provided with a through hole, one end of the instrument supporting rod, which is back to the instrument measuring point, is arranged in the through hole, the surface of one side, which faces the instrument measuring point, of the instrument mounting seat is in an arc shape with the radius of R2, and the length of the instrument supporting rod between the instrument measuring point and the instrument mounting seat is L;
wherein the content of the first and second substances,
r2 is equal to the radius of the inner surface of the measurement flow channel of the rake type instrument;
l is equal to the distance from the testing position of the rake type instrument to the inner surface of the measuring flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581031.9A CN108709576B (en) | 2018-06-05 | 2018-06-05 | Harrow type instrument test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581031.9A CN108709576B (en) | 2018-06-05 | 2018-06-05 | Harrow type instrument test structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108709576A CN108709576A (en) | 2018-10-26 |
| CN108709576B true CN108709576B (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810581031.9A Active CN108709576B (en) | 2018-06-05 | 2018-06-05 | Harrow type instrument test structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954333A (en) * | 2019-12-05 | 2020-04-03 | 中国航发四川燃气涡轮研究院 | Probe and method of using the same |
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| CN108709576A (en) | 2018-10-26 |
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