CN112213062A - Sudden-increase high-energy basic excitation test bed for laboratory and test method - Google Patents
Sudden-increase high-energy basic excitation test bed for laboratory and test method Download PDFInfo
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- CN112213062A CN112213062A CN202011047101.6A CN202011047101A CN112213062A CN 112213062 A CN112213062 A CN 112213062A CN 202011047101 A CN202011047101 A CN 202011047101A CN 112213062 A CN112213062 A CN 112213062A
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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
- G01M7/06—Multidirectional test stands
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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
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- Combustion & Propulsion (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a sudden-increase high-energy basic excitation test bed for a laboratory, which comprises an air cannon, a base, a test bed table board borne on the base, a simulation engine and a driving motor, wherein the simulation engine and the driving motor are installed on the test bed table board; the base is connected with the test bed table board through a plate-shaped spring or a common multi-directional spring; the test bed is used for simulating the action working condition of sudden lateral high-energy basic excitation when the marine gas turbine is exploded by a near field/far field; the air cannon system and the plate-shaped spring are arranged on the axial direction of the test bed, and the axial high-energy foundation excitation test bed is added suddenly when the test bed is in the axial direction, so that the air cannon system and the plate-shaped spring can be used for simulating the action working condition of the aircraft gas turbine excited by the axial high-energy foundation suddenly when a ship is stopped.
Description
Technical Field
The invention relates to the field of gas turbine engines, in particular to a test bed and a test method for exciting the complete machine or rotor part of a gas turbine engine by a sudden high-energy foundation.
Background
Taking a carrier-based aircraft and an aircraft carrier as examples, under the service condition, an aircraft gas turbine engine can encounter an arresting carrier, and a marine gas turbine can encounter near-field/far-field explosion. The sudden high-energy load formed in the engine structure under the severe working conditions acts on the engine in a high-density impact energy mode, so that the dynamic characteristics of the whole engine/rotor component of the engine are deteriorated, the key construction is damaged, the structural safety of the engine is endangered, and the use safety of the engine is seriously influenced.
According to the characteristics of the load action, the research on the dynamic response problem of the gas turbine engine under the two working conditions can be summarized into the research on the dynamic response problem of the gas turbine engine under the action of the sudden high-energy basic excitation. The near field/far field explosion working condition can be summarized as that external explosion load applies sudden lateral/multidirectional high-energy basic excitation to the marine gas turbine, and the arresting landing working condition can be summarized as that an arresting cable applies sudden axial high-energy basic excitation to the aircraft gas turbine engine. The load is characterized in that: the load acts on an engine installation foundation and is transmitted to the stator through the installation structure and then is transmitted to the rotor; high load energy density and short acting time.
In order to avoid structural damage to the complete machine/rotor part of the gas turbine engine caused by the sudden high-energy basic excitation, it is necessary to perform experimental research work for simulating the response characteristics of the complete machine/rotor part of the engine under the action of the sudden high-energy basic excitation under the laboratory condition. Accurate simulation of the boosted energy basis excitation under each condition in the laboratory is a prerequisite for the development of this study. In the prior art, no suitable technical scheme is available for accurately testing the sudden high-energy basic excitation.
Therefore, it is necessary to design a laboratory sudden high-energy basic excitation test bed to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a sudden high-energy basic excitation test bed for a laboratory, which solves the technical problems that: the application of the sudden high-energy basic excitation load can be accurately realized; the coupling vibration in the axial direction, the lateral direction and the vertical direction of the test bed can be effectively isolated; the application of different forms of basic excitation can be accurately realized by changing the type and the mounting mode of the supporting spring.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme.
A laboratory sudden-increase high-energy basic excitation test bed comprises an air cannon, a base, a test bed table board borne on the base, a simulation engine and a driving motor, wherein the simulation engine and the driving motor are installed on the test bed table board;
the base is connected with the test bed table board through a plate-shaped spring or a common multi-directional spring;
the muzzle opposite direction of the air cannon is selected from one of the following three directions:
the direction (1) is that the muzzle of the air cannon is over against the side surface of the test bed table-board, and the launching direction of the air cannon is vertical to the output shaft of the driving motor;
the direction (2) that the plate surface of the plate-shaped spring is vertical to the direction of the output shaft of the driving motor is arranged between the base and the test bed platform surface, the muzzle of the air cannon is over against the plate surface of the plate-shaped spring, and the launching direction of the air cannon is parallel to the output shaft of the driving motor;
and the direction (3) and the side edge of the test bed table surface are provided with impact plates, the impact plates are provided with impact surfaces, the extension directions of the impact surfaces and the extension directions of the output shafts of the driving motors form an acute angle, the muzzle of the air cannon is opposite to the impact surfaces, and the launching direction of the air cannon is vertical to the impact surfaces.
Further, when the muzzle of the air cannon is opposite to the direction (1), the base is connected with the test bed table board through the plate-shaped spring, the inner side of the upper end of the plate-shaped spring is directly fixed with the side face of the test bed table board, and the inner side of the lower end of the plate-shaped spring is directly fixed with the side face of the base.
Further, when the muzzle of the air cannon is opposite to the direction (2), the side surface of the base protrudes outwards to form a lower connecting block, the side surface of the test bed protrudes outwards to form an upper connecting block, the inner side of the upper end of the plate-shaped spring is directly fixed with the upper connecting block, the inner side of the lower end of the plate-shaped spring is directly fixed with the lower connecting block, and the plate surface of the plate-shaped spring is perpendicular to the output shaft of the driving motor.
Furthermore, the driving motor and the simulation engine are coaxially arranged on the table surface of the test bed, and the driving motor and the simulation engine rotating shaft are coaxially connected through a coupler.
Further, the simulation engine is a simulation complete machine comprising a rotor-support-stator, or a separate rotor-support system.
The technical scheme of the test method using the test bed is as follows: the method comprises the steps of simulating the action working condition of sudden lateral high-energy basic excitation of the marine gas turbine when the marine gas turbine is subjected to near field/far field explosion, simulating the action working condition of sudden axial high-energy basic excitation of the aircraft gas turbine when the aircraft gas turbine is stopped, and simulating the action working condition of sudden multidirectional high-energy basic excitation when the near field/far field explosion occurs;
when the action working condition of sudden lateral high-energy basic excitation of a marine gas turbine under near field/far field explosion is simulated, the muzzle of an air cannon is opposite to the direction (1);
when the action working condition that the arresting carrier aircraft gas turbine is excited by the suddenly added axial high-energy foundation is simulated, the muzzle of the air cannon is opposite to the direction (2);
when the working condition of the marine gas turbine excited by the suddenly added multidirectional high-energy foundation during near field/far field explosion is simulated, the muzzle of the air cannon is opposite to the direction (3).
Has the advantages that: the invention has the following positive effects:
the invention discloses a sudden high-energy basic excitation test bed for a laboratory, which can be used for experimental research work of simulating the dynamic response of a complete machine/a rotor of an engine under the action of sudden high-energy basic excitation in the laboratory;
the air cannon system adopted by the test bed can accurately simulate the characteristics of high energy and short time of sudden loading, and realize the accurate application of the sudden loading high energy basic excitation load;
the rigidity of the plate-shaped spring adopted in the invention along the axial direction, the lateral direction and the vertical direction of the test bed has anisotropy, the rigidity of one direction is far smaller than that of the other two directions, the isolation of three-direction coupling vibration can be realized, the integral vibration is limited in the direction with small rigidity, and the study on the regularity of unidirectional vibration is convenient to carry out;
the air cannon system and the plate-shaped spring are arranged on the side surface of the test bed, namely the sudden-adding lateral high-energy basic excitation test bed, and can be used for simulating the action working condition of sudden-adding lateral high-energy basic excitation when the marine gas turbine is exploded by a near field/a far field; the air cannon system and the plate-shaped spring are arranged on the axial direction of the test bed, and the axial high-energy foundation excitation test bed is added suddenly when the test bed is in the axial direction, so that the action working condition of the axial high-energy foundation excitation when the ship is stopped can be simulated;
the replacement of the plate-shaped springs with different thicknesses can be used for researching the influence rule of sudden high-energy basic excitation on the dynamic response of the simulated engine under the condition of different bearing stiffness;
changing the launching speed of the projectile of the air cannon system and the basic excitation research rule of the projectile material for researching different impact energy and different impact time on the dynamic response of the analog engine;
the plate-shaped spring is replaced by a common spring, and the included angle between the air cannon muzzle and the axial line of the test bed table is adjusted to form the sudden-adding multi-direction high-energy basic excitation test bed, so that the method can be used for researching the influence rule of the sudden-adding high-energy basic excitation on the multi-direction coupling vibration of the analog engine.
Drawings
FIG. 1 is a schematic view of a sudden lateral high energy basis excitation test stand;
FIG. 2 is a schematic view of a sudden axial high energy basis excitation test stand;
FIG. 3 is a schematic view of a sudden multi-directional high-energy basic excitation test bed;
FIG. 4 is a schematic view of a simulated complete machine of rotor-bearing-stator;
fig. 5 is a schematic view of a rotor-support system configuration.
Detailed Description
The following describes a squeeze film damper bidirectional excitation tester capable of measuring inlet oil pressure and inlet oil temperature according to the present invention with reference to the accompanying drawings.
Preferred embodiments of the apparatus and method of the present invention will now be described in further detail with reference to the accompanying drawings.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.
The invention discloses a sudden-increase high-energy basic excitation test bed for a laboratory, which comprises a simulated engine to be tested 1, a mounting bracket 2, a mounting bracket 3, a driving motor 4, a test bed table surface 5, a supporting spring 6, a base 7 and an air cannon 8, and is shown in figure 1. The simulation engine can be a simulation whole machine containing a rotor-support-stator shown in FIG. 4, or can be a single rotor-support system shown in FIG. 5; the simulation engine 1 is arranged on a test bed table-board 5 through a mounting bracket 2 and a mounting bracket 3; the driving motor 4 and the simulation engine 1 are coaxially arranged on the test bed table surface 5 and are coaxially connected with the simulation engine rotating shaft 11 through a coupler; the test bed table surface 5 is connected with a base 7 through 4 groups of supporting springs 6; and the air cannon system 8 is arranged on the side surface of the test bed and is flush with the test bed table surface 5. At the moment, the muzzle of the air cannon is over against the side surface of the test bed table-board, and the launching direction of the air cannon is vertical to the output shaft of the driving motor; the device is used for simulating the action condition of sudden lateral high-energy basic excitation when the marine gas turbine is subjected to near field/far field explosion.
Referring to fig. 2, the air cannon 8 is adjusted to be in the axial direction and aligned with the horizontal direction of the rotating shaft 11, and the installation mode of the 4 sets of supporting springs 6 is adjusted, so that an upper connecting block 51 is additionally arranged between the supporting springs 6 and the test bed table 5, and a lower connecting block 71 is additionally arranged between the supporting springs 6 and the base 7. The plate surface of the plate-shaped spring is arranged between the base and the test bed table surface in a direction vertical to the output shaft of the driving motor, the muzzle of the air cannon is over against the plate surface of the plate-shaped spring, and the launching direction of the air cannon is parallel to the output shaft of the driving motor. The test bed is changed into a sudden axial high-energy basic excitation test bed, and the test bed can be used for simulating the action working condition of sudden axial high-energy basic excitation when a ship is stopped;
referring to fig. 3, 4 sets of supporting springs 6 are changed into ordinary multi-directional springs, and meanwhile, an impact plate 52 is installed on the side surface of the test bed table 5, the impact plate is provided with an impact surface, the extension direction of the impact surface and the extension direction of the output shaft of the driving motor form an acute angle, the muzzle of the air cannon 8 is opposite to the impact surface, and the launching direction of the air cannon 8 is perpendicular to the impact surface. At the moment, the test bed is changed into a sudden multi-directional high-energy basic excitation test bed, and the test bed can be used for simulating the action working condition of sudden multi-directional high-energy basic excitation during near field/far field explosion.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a laboratory is with suddenly increasing high energy basis excitation test bench which characterized in that: the test bed comprises an air cannon, a base, a test bed table board borne on the base, a simulation engine and a driving motor, wherein the simulation engine and the driving motor are installed on the test bed table board;
the base is connected with the test bed table board through a plate-shaped spring or a common multi-directional spring;
the muzzle opposite direction of the air cannon is selected from one of the following three directions:
the direction (1) is that the muzzle of the air cannon is over against the side surface of the test bed table-board, and the launching direction of the air cannon is vertical to the output shaft of the driving motor;
the direction (2) that the plate surface of the plate-shaped spring is vertical to the direction of the output shaft of the driving motor is arranged between the base and the test bed platform surface, the muzzle of the air cannon is over against the plate surface of the plate-shaped spring, and the launching direction of the air cannon is parallel to the output shaft of the driving motor;
and the direction (3) and the side edge of the test bed table surface are provided with impact plates, the impact plates are provided with impact surfaces, the extension directions of the impact surfaces and the extension directions of the output shafts of the driving motors form an acute angle, the muzzle of the air cannon is opposite to the impact surfaces, and the launching direction of the air cannon is vertical to the impact surfaces.
2. The laboratory sudden high energy basic excitation test stand of claim 1, wherein: when the muzzle of the air cannon is opposite to the direction (1), the base is connected with the test bed table-board through the plate-shaped spring, the inner side of the upper end of the plate-shaped spring is directly fixed with the side face of the test bed table-board, and the inner side of the lower end of the plate-shaped spring is directly fixed with the side face of the base.
3. The laboratory sudden high energy basic excitation test stand of claim 1, wherein: when the muzzle of the air cannon is opposite to the direction (2), the side surface of the base protrudes outwards to form a lower connecting block, the side surface of the test bed protrudes outwards to form an upper connecting block, the inner side of the upper end of the plate-shaped spring is directly fixed with the upper connecting block, the inner side of the lower end of the plate-shaped spring is directly fixed with the lower connecting block, and the plate surface of the plate-shaped spring is perpendicular to the output shaft of the driving motor.
4. The laboratory use sudden high energy basis excitation test station of claim 1, 2 or 3, wherein: the driving motor and the simulation engine are coaxially arranged on the table board of the test bed, and the rotating shaft of the driving motor and the simulation engine are coaxially connected through a coupler.
5. The laboratory sudden high energy basic excitation test stand of claim 4, wherein: the simulation engine is a simulation complete machine comprising a rotor-support-stator or a separate rotor-support system.
6. A test method using a test stand according to any one of claims 1 to 5, characterized in that: the method comprises the steps of simulating the action working condition of sudden lateral high-energy basic excitation of the marine gas turbine when the marine gas turbine is subjected to near field/far field explosion, simulating the action working condition of sudden axial high-energy basic excitation of the aircraft gas turbine when the aircraft gas turbine is stopped, and simulating the action working condition of sudden multidirectional high-energy basic excitation when the near field/far field explosion occurs;
when the action working condition of sudden lateral high-energy basic excitation of a marine gas turbine under near field/far field explosion is simulated, the muzzle of an air cannon is opposite to the direction (1);
when the action working condition that the arresting carrier aircraft gas turbine is excited by the suddenly added axial high-energy foundation is simulated, the muzzle of the air cannon is opposite to the direction (2);
when the working condition of the marine gas turbine excited by the suddenly added multidirectional high-energy foundation during near field/far field explosion is simulated, the muzzle of the air cannon is opposite to the direction (3).
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