CN115077825B - Vibration test method for piston type aeroengine - Google Patents
Vibration test method for piston type aeroengine Download PDFInfo
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- CN115077825B CN115077825B CN202210548461.7A CN202210548461A CN115077825B CN 115077825 B CN115077825 B CN 115077825B CN 202210548461 A CN202210548461 A CN 202210548461A CN 115077825 B CN115077825 B CN 115077825B
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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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
- G01M15/04—Testing internal-combustion engines
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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
- G01M15/04—Testing internal-combustion engines
- G01M15/12—Testing internal-combustion engines by monitoring vibrations
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to the technical field of engine vibration tests and discloses a piston aeroengine vibration test method. The invention combines the performance characteristics of the engine, so that the airworthiness clause has better operability and practicability, provides reference basis for the vibration test of the domestic piston type aeroengine in future, perfects the vibration test method of the domestic piston type aeroengine, forms the guidance method for the first-time vibration test airworthiness task in China, and explores a proper method and experience for airworthiness verification of new products of the domestic piston type aeroengine.
Description
Technical Field
The invention relates to the technical field of engine vibration tests, in particular to a piston aeroengine vibration test method.
Background
An aeroengine is a highly complex and precise thermodynamic machine that provides the aircraft with the power required for flight. As the heart of the aircraft, the aircraft is praised as "industrial flower", which directly affects the performance, reliability and economy of the aircraft, and is an important expression of national science and technology, industry and national defense.
In order to ensure the safety of the aircraft flying in high altitude, before the engine is put into use, a vibration test is required to be carried out on the engine so as to detect whether each index of the engine meets the running requirement under the vibration condition.
However, the prior vibration test method for the piston aero-engine is lack of experience in domestic enterprises and main engine factories, and related references are also fewer, and foreign related legal contents are expressed widely and are insufficient for providing guidance for implementation. For this purpose, the application proposes a piston aeroengine vibration test method.
Disclosure of Invention
Aiming at the defects of the prior piston aeroengine vibration test method in the background technology in the use process, the invention provides the piston aeroengine vibration test method, and solves the problems in the background technology.
The invention provides the following technical scheme: a vibration test method of a piston aeroengine comprises the following steps:
step one: installing test equipment;
the test device comprises a test device sensor, a portable data acquisition instrument, a router, a notebook, a communication line, a network cable, a mobile bench and a bench control console, wherein the sensor is fixed on a test part, a signal line of the sensor is connected to the portable data acquisition instrument, and the data acquisition instrument is connected to the notebook through the router and the network cable to realize real-time data transmission and display;
step two: carrying out sweep frequency test;
the sweep test is used for obtaining vibration displacement or vibration stress of the test component so as to determine peak vibration levels of key components and vibration sensitive components in the test component and corresponding rotating speed working conditions thereof;
the sweep test comprises bending vibration characteristic test and bending vibration-torsional vibration characteristic test, and is used for testing the bending vibration characteristic component and the bending vibration-torsional vibration characteristic component respectively;
step three: performing a residence test;
the residence test is used for determining whether the test part can fail due to vibration under the long-time working of the vibration peak value;
the residence test comprises the following steps: and testing key components and vibration sensitive components with larger vibration intensity or vibration stress at working points corresponding to vibration displacement peaks or vibration acceleration peaks.
Preferably, the bending vibration characteristic test process comprises the following steps: and regulating and controlling the rotation speed of the engine to ensure that the rotation speed of the engine covers the range from the rotation speed of the slow vehicle to the set rotation speed, and acquiring the peak vibration level of the test part and the corresponding rotation speed working condition according to the sensor.
Preferably, the bending vibration-torsional vibration characteristic test process comprises the following steps: and obtaining the difference value between the torsion angle of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel under the same rotation speed by measuring the torsion angles at two ends of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel.
Preferably, during the bending vibration characteristic test, the engine set speed is the greater of 110% of the required maximum continuous rotational speed and 103% of the required maximum take-off rotational speed.
Preferably, the bending vibration characteristic component comprises a high-pressure fuel pump and a turbocharger;
the bending vibration-torsional vibration characteristic component comprises a propeller shaft and a crankshaft.
Preferably, in the bending-torsional characteristic test, the maximum bending stress forming the maximum torsion angle of the bending-torsional characteristic measuring part corresponds to an operating state at the maximum rotation speed and the maximum power of the engine.
The invention has the following beneficial effects:
the invention combines the performance characteristics of the engine, so that the airworthiness clause has better operability and practicability, provides reference basis for the vibration test of the domestic piston type aeroengine in future, perfects the vibration test method of the domestic piston type aeroengine, forms the guidance method for the first-time vibration test airworthiness task in China, and explores a proper method and experience for airworthiness verification of new products of the domestic piston type aeroengine.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of an experimental test of the present invention.
Description of the embodiments
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.
In order to solve the requirements of piston type aeroengine vibration airworthiness work tasks, an executable test method needs to be formulated and programmed, the test method is required to meet the requirements of national aviation certification clauses, the test method is suitable for piston type aeroengine vibration tests, according to CS-E regulations and airworthiness requirements, and is combined with statement engine performance characteristics to perform optimization adjustment, and the components with the natural frequencies far greater than the engine working frequency of structures such as a cylinder body, a cylinder cover and an air intake manifold can be indicated that excessive vibration cannot occur only through modes such as experience, CAE analysis or natural frequency test. For critical components, vibration sensitive components, compliance must be verified using methods of vibration testing, which mainly include sweep testing and dwell testing:
referring to fig. 1, a vibration test method of a piston aeroengine includes the following steps:
step one: installing test equipment;
referring to fig. 2, the sensor of the test device, the portable data acquisition instrument, the router, the notebook, the communication line and the network cable, the mobile bench and the bench control console are used for fixing the sensor on the test part, the signal line of the sensor is connected to the portable data acquisition instrument, and the data acquisition instrument is connected to the notebook through the router and the network cable, so that data real-time transmission and display are realized, and an operator controls the starting, running and stopping of the engine.
Step two: carrying out sweep frequency test;
the sweep test is used for obtaining vibration displacement or vibration stress of the test component so as to determine peak vibration levels of key components and vibration sensitive components in the test component and corresponding rotating speed working conditions thereof;
the vibration sensitive component is a component determined by using experience, CAE analysis or vibration sweep experiments;
the key component is a component which generates harmful effects on the engine after failure due to the influence of vibration;
the sweep test comprises bending vibration characteristic test for testing bending vibration characteristic components such as a high-pressure fuel pump and a turbocharger;
bending-torsional characteristics test for testing bending-torsional characteristics components, such as propeller shaft, crankshaft, etc., test components;
the bending vibration characteristic test process comprises the following steps: the engine speed is regulated so that the engine speed covers 110% of the maximum continuous speed from the slow speed or 103% of the required maximum take-off speed, and the peak vibration level of the test part and the corresponding speed working condition are obtained according to the sensor.
The bending vibration-torsional vibration characteristic test process comprises the following steps: obtaining the difference value between the torsion angle of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel under the same rotation speed by measuring the torsion angles at two ends of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel;
in the bending vibration-torsional vibration characteristic test process, the maximum bending stress forming the maximum torsion angle of the bending vibration-torsional vibration characteristic measuring component corresponds to the running state of the engine at the maximum rotation speed and the maximum power.
Step three: performing a residence test;
the residence test is used for determining whether the test part can fail due to vibration under the long-time working of the vibration peak value;
the residence test comprises the following steps: and testing key components and vibration sensitive components with larger vibration intensity or vibration stress at working points corresponding to vibration displacement peaks or vibration acceleration peaks.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A vibration test method of a piston aeroengine is characterized by comprising the following steps of: the method comprises the following steps:
step one: installing test equipment;
the test equipment comprises a sensor, a portable data acquisition instrument, a router, a notebook, a communication line, a network cable, a mobile bench and a bench control console, wherein the sensor is fixed on a test part, a signal line of the sensor is connected to the portable data acquisition instrument, and the data acquisition instrument is connected to the notebook through the router and the network cable to realize real-time data transmission and display;
step two: carrying out sweep frequency test;
the sweep test is used for obtaining vibration displacement or vibration stress of the test component so as to determine peak vibration levels of key components and vibration sensitive components in the test component and corresponding rotating speed working conditions thereof;
the sweep test comprises bending vibration characteristic test and bending vibration-torsional vibration characteristic test, and is used for testing the bending vibration characteristic component and the bending vibration-torsional vibration characteristic component respectively;
the bending vibration-torsional vibration characteristic test process comprises the following steps: obtaining the difference value between the torsion angle of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel under the same rotation speed by measuring the torsion angles at two ends of the bending vibration-torsion characteristic component and the torsion angle of the dual-mass flywheel;
in the bending vibration characteristic test process, the set speed of the engine is the greater of 110% of the required maximum continuous rotation speed and 103% of the required maximum take-off rotation speed;
in the bending vibration-torsional vibration characteristic test process, the maximum bending stress for forming the maximum torsion angle of the bending vibration-torsional vibration characteristic part corresponds to the running state of the engine at the maximum rotating speed and the maximum power;
step three: performing a residence test;
the residence test is used for determining whether the test part can fail due to vibration under the long-time working of the vibration peak value;
the residence test comprises the following steps: and testing key components and vibration sensitive components with larger vibration intensity or vibration stress at working points corresponding to vibration displacement peaks or vibration acceleration peaks.
2. A method of vibration testing of a piston aeroengine as claimed in claim 1, wherein: the bending vibration characteristic test process comprises the following steps: and regulating and controlling the rotation speed of the engine to ensure that the rotation speed of the engine covers the range from the rotation speed of the slow vehicle to the set rotation speed, and acquiring the peak vibration level of the test part and the corresponding rotation speed working condition according to the sensor.
3. A method of vibration testing of a piston aeroengine as claimed in claim 1, wherein: the bending vibration characteristic component comprises a high-pressure fuel pump and a turbocharger;
the bending vibration-torsional vibration characteristic component comprises a propeller shaft and a crankshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210548461.7A CN115077825B (en) | 2022-05-20 | 2022-05-20 | Vibration test method for piston type aeroengine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210548461.7A CN115077825B (en) | 2022-05-20 | 2022-05-20 | Vibration test method for piston type aeroengine |
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| Publication Number | Publication Date |
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| CN115077825A CN115077825A (en) | 2022-09-20 |
| CN115077825B true CN115077825B (en) | 2023-06-09 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB211898A (en) * | 1923-02-26 | 1925-02-26 | Otto Foeppl | Improvements in and relating to the testing of engineering materials under torsion |
| GB908385A (en) * | 1959-07-30 | 1962-10-17 | Atomic Energy Authority Uk | System for testing articles by vibration |
| CN109115433B (en) * | 2017-06-23 | 2020-09-25 | 江铃汽车股份有限公司 | Torsional vibration and torsional working deformation testing and analyzing method for automobile power transmission system |
| CN113390592A (en) * | 2021-06-21 | 2021-09-14 | 哈尔滨东安汽车动力股份有限公司 | Measuring rack for vibration intensity of range extender and measuring method thereof |
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