CN112525739A - High-temperature random fatigue test device and method - Google Patents

Abstract

The invention discloses a high-temperature random fatigue test device and method, comprising a test piece fixture, a quartz lamp heating array, a vibration excitation module, etc.; both ends of the quartz lamp heating array are mounted on an integral frame, and the bottom of the test piece fixture is mounted on a On the overall frame, the two ends of the test piece are fixed by the test piece fixture, and a number of vibration excitation modules are installed on the overall frame; the electrical control system is used to power the quartz lamp heating array, and the quartz lamp heating array is used to heat the test piece and vibrate the test piece. The excitation module is controlled by the electrical control system to excite the test piece; the cooling gas supply system is used for air cooling the quartz lamp heating array; the cooling water supply system is used for the whole frame, the test piece fixture and the vibration excitation module. water cooled. The present invention overcomes the problem that the current ultra-high temperature materials are difficult to perform complex vibration tests in a complex high temperature temperature field through the quartz lamp active cooling technology, the excitation hammer cooling technology and the excitation hammer modular combination technology.

Description

A high temperature random fatigue test device and method

technical field

The invention belongs to the field of high temperature heating and mechanical random fatigue and vibration of quartz lamps, in particular to a high temperature random fatigue test device and method.

Background technique

In large-scale industrial heat engines with strategic significance such as aero engines and gas turbines, or civil heat engines such as automobile engines, a high temperature environment is inevitably formed during the process of fuel generating propulsion. The increase of temperature will cause changes in the material properties of the structure and thermal deformation, and the temperature difference between the inside and outside of the structure will cause thermal stress, which will lead to changes in the shape, strength and stiffness of the structure, which directly affects the dynamic strength of the structure. There are more and more engineering examples of changes in the vibration characteristics of structures caused by temperature changes, and the demand for vibration testing of structures in high temperature environments is getting higher and higher. significant.

At present, the vibration test device for structural parts is generally a vibration table excited by electromagnetic or hydraulic drive technology. state and force. Most of these vibration tests are carried out in the normal temperature environment, and there is no systematic device to carry out the high temperature environment vibration test on the structural parts. Some vibration tests in high temperature environments only add heating devices around the original vibration test bench. For example, the existing reported high-temperature fatigue test of turbine blades is usually heated by an electric furnace heating method. This method can only complete the vibration fatigue test with a blade temperature below 600 °C, and the test temperature is much lower than that of aero-engine turbine blades. the actual operating temperature. However, the method of heating structural parts by electric induction heating can only complete the vibration test below 900 °C. These tests cannot monitor the ambient temperature around the structural parts in real time, and need to perform temperature detection when the vibration is stopped, and the temperature during the vibration process cannot guarantee the accuracy. In addition, the temperature cannot be adjusted, and the temperature can only be set in advance, and the vibration test can be started when the set value is reached. In addition, because the heating device and the vibration device are independent, the test control process is relatively complicated, and the test difficulty increases.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high temperature random fatigue test device and method in view of the deficiencies in the prior art that it is difficult to achieve extreme high temperature (>1000°C) vibration device and random vibration loading of materials.

The present invention adopts following technical scheme to realize:

A high-temperature random fatigue test device, comprising an overall frame, a test piece fixture, a quartz lamp heating array, a vibration excitation module, a test piece, an electrical control system, a cooling gas supply system and a cooling water supply system; wherein,

The two ends of the quartz lamp heating array are installed on the whole frame, the bottom of the test piece fixture is installed on the whole frame, and the two ends of the test piece are fixed by the test piece fixture, so that the test piece is located in the middle of the quartz lamp heating array, and some vibration excitation The modules are installed on the overall rack;

The electrical control system is used to power the quartz lamp heating array, the quartz lamp heating array is used to heat the test piece, and the vibration excitation module is controlled by the electrical control system to excite the test piece; the cooling gas supply system is used to provide cooling air to the test piece. The quartz lamp heating array is air-cooled; the cooling water supply system is used to provide cooling water to water-cool the overall frame, the test piece fixture and the vibration excitation module.

A further improvement of the present invention lies in that the overall rack is provided with a rack cooling water channel and an electronic monitoring and control equipment cooling and protective gas blowing outlet.

A further improvement of the present invention is that the test piece fixture includes a fixture base whose bottom is installed on the overall frame, and an upper fixture installed on the fixture base. The fixture base and the upper fixture are provided with fixture cooling water pipes, and the two ends of the test piece are provided with cooling water pipes. It is fixed by the upper clamps of the two test piece clamps.

A further improvement of the present invention is that the quartz lamp heating array includes a quartz lamp mounting base, a quartz lamp and a quartz pipe, the quartz lamp is sheathed in the quartz pipe, and both ends are mounted on the overall frame through the quartz lamp mounting base, and the quartz lamp and the quartz lamp The ducts are nested to form cooling air channels.

A further improvement of the present invention lies in that the quartz lamp installation base includes a quartz lamp installation lower base and a quartz lamp installation upper base which are used together.

A further improvement of the present invention is that the vibration excitation module includes a vibration excitation hammer base fixed on the overall frame, and a vibration excitation hammer connected to the sliding pair of the vibration excitation hammer base, and a vibration excitation hammer cooling water pipeline is opened in the vibration excitation hammer .

A further improvement of the present invention is that the base of the vibration hammer and the surface of the vibration hammer are coated with a zirconia thermal protection coating.

A further improvement of the present invention is that the electrical control system includes a measurement and control integrated module for measuring heating temperature, excitation amplitude and stress distribution, control signal lines for controlling the excitation hammer and quartz lamp heating array, and an electrical control center for processing signals .

A further improvement of the present invention is that the cooling gas supply system includes a cooling gas supply center and a cooling gas;

The cooling water supply system includes a cooling water treatment center, and cooling water outflow pipes and cooling water inflow pipes for supplying circulating cooling water.

A high-temperature vibration fatigue test method, the method is based on the above-mentioned high-temperature vibration fatigue test device, comprising the following steps:

Step 1: Fix the test piece on the fixture base, and use the upper fixture to fix the test piece;

Step 2: Fix the installation base of the quartz lamp, open the cooling gas supply system, and the cooling system is supplied to the electronic measurement and control equipment for cooling the measurement and control integrated module through the cooling gas supply pipeline respectively. cooling air passages;

Step 3: Open the cooling water supply system, the cooling water flows through the cooling water outflow pipe into the vibration hammer cooling water pipe inside the vibration hammer for cooling, the cooling water cools the rack through the rack cooling water channel, and the cooling water passes through the fixture The cooling water pipeline is used to cool the fixture;

Step 4: The electrical control system supplies power to the quartz lamp, the quartz lamp heats the test piece, and feeds back the real-time measurement and control temperature field to the electrical control system through the measurement and control integrated module;

Step 5: The vibration excitation hammer is controlled by the electrical control system, excites the test piece, and returns to the electrical control system in real time through the measurement and control integrated module to control the excitation parameters;

Step 6: At the end of the test, the electrical control system stops the power output of the quartz lamp. After the test piece and the device are cooled to normal temperature, the cooling water supply system and the cooling gas supply system are stopped in turn, and the test is over.

The present invention at least has the following beneficial technical effects:

The high temperature random fatigue test device provided by the invention adopts the quartz lamp active cooling technology and the excitation hammer cooling technology. The fatigue vibration effect in the high temperature environment of the workpiece at extremely high temperature (1000°C), which is difficult to achieve in the classical high temperature environment fatigue vibration method, is realized, and the random vibration simulation test task can be effectively realized by the arrangement of the excitation hammer.

The invention provides a high-temperature random fatigue test method. By fixing the test piece in the area heated by the quartz lamp, and by arranging multiple groups of excitation hammers in the dislocation area of the quartz lamp, the basic high temperature irradiation environment is realized. Fatigue test task. During the experiment, the cooling gas was introduced into the outer pipe of the quartz lamp to increase the life of the quartz lamp in a high temperature (1000°C) operating environment. During the experiment, cooling liquid was introduced into the cooling channel designed inside the excitation hammer to protect the performance and life of the excitation hammer. During the experiment, the test device is protected by passing coolant to ensure the service life of the test device.

Description of drawings

FIG. 1 is a schematic structural diagram of a high temperature random fatigue test device of the present invention.

FIG. 2 is a partial axonometric view of a high temperature random fatigue test device of the present invention.

Description of reference numbers:

1. Overall frame, 2. Test piece fixture, 3. Quartz lamp heating array, 4. Vibration excitation module, 5. Test piece, 6. Electrical control system, 7. Cooling gas supply system, 8. Cooling water supply system;

101. Rack cooling water channel, 102. Cooling and protective gas blowing outlet of electronic measurement and control equipment;

201, upper fixture, 202, fixture base, 203, fixture cooling water pipe;

301, the quartz lamp is installed on the lower base, 302, the quartz lamp is installed on the upper base, 303, the cooling air channel, 304, the quartz pipe, 305, the quartz lamp.

401, vibration hammer base, 402, zirconia thermal protection coating, 403, vibration hammer, 404, vibration hammer cooling water pipeline;

601, control signal line, 602, measurement and control integrated module;

701. Cooling gas supply pipeline;

801. The cooling water flows out of the pipeline, and 802, the cooling water flows into the pipeline.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , a high-temperature vibration fatigue test device provided by the present invention includes a quartz lamp heating array 3 fixed on the overall frame 1, a vibration excitation module 4 fixed on the overall frame 1, a fixed The test piece fixture 2 on the overall frame 1, the test piece 5 fixed on the test piece fixture 2, the electrical control system 6 externally connected to the device, the cooling gas supply system 7 externally connected to the device, the external connection into the cooling water supply system 8 in the device.

The overall rack 1 includes a cooling and protective gas outlet 102 for electronic monitoring and control equipment fixed on the overall rack 1 and a rack cooling water channel 101 connected to the overall rack 1 .

The quartz lamp heating array 3 includes a quartz lamp installation lower base 301 fixed on the overall frame 1, a quartz lamp installation upper base 302 fixed on the quartz lamp installation lower base 301, and quartz lamp installation lower bases 301 respectively fixed on the quartz lamp installation lower base 301. The quartz lamp 305 in the base 302 is installed with the quartz lamp, the quartz tube 304 is sheathed outside the quartz lamp 305, the cooling air channel 303 formed by the quartz lamp 305 and the quartz lamp tube 304 is nested, and the cooling air channel 303 is connected to the Cooling gas supply line 701 .

The test piece fixture 2 includes a fixture base 202 fixed on the overall frame 1, an upper fixture 201 fixed on the fixture base, a cooling water pipe 203 processed inside the fixture 2, respectively fixed on the upper fixture 201 and cooling. The cooling water of the water pipe 203 flows into the pipe 802 , and the cooling water of the inner cooling water pipe 203 is respectively fixed to the upper fixture of the test piece and the lower fixture of the test piece and flows out of the pipe 801 .

The vibration excitation module 4 includes a vibration excitation hammer base 401 fixed on the overall frame 1, an excitation hammer 403 connected with the sliding pair of the vibration excitation hammer base 401, a vibration excitation hammer coated on the vibration excitation hammer base 401 and the vibration excitation hammer. Zirconia thermal protection coating 402 on 403 , cooling water pipeline 404 processed inside the vibration hammer 403 .

The electrical control system 6 includes a measurement and control integrated module 602 for measuring heating temperature, excitation amplitude and stress distribution; control signal lines for controlling the excitation hammer 403 and the quartz lamp heating array 3; and an electrical control center for processing signals.

The cooling gas supply system 7 includes a cooling gas supply center and cooling gas; the cooling water supply system 8 includes a cooling water treatment center, and a cooling water outflow pipe 801 and a cooling water inflow pipe 802 for providing circulating cooling water.

A high temperature random fatigue test method provided by the present invention comprises the following steps:

The first step: open the test piece fixture 2, fix the test piece 5 on the fixture base 202, and use the upper fixture 201 to fix the test piece 5.

The second step: fixing the quartz lamp installation base, including the quartz lamp installation lower base 301 and the quartz lamp upper base 302. The cooling air supply system 7 is turned on, and the cooling system supplies the cooling air outlet 102 of the electronic measurement and control equipment for cooling the measurement and control integrated module 602 and the cooling air passage 303 for cooling the quartz lamp 305 through the cooling air supply pipeline 701 respectively. .

Step 3: Open the cooling water supply system 8, the cooling water flows into the vibration hammer cooling water pipeline 404 inside the vibration excitation hammer 403 through the cooling water outflow pipeline 801 for cooling, and the cooling water passes through the rack cooling water channel 101 to cool the rack , the cooling water cools the fixture 2 through the fixture cooling water pipe 203 .

Step 4: The electrical control system 6 supplies power to the quartz lamp 305, the quartz lamp 305 heats the test piece 5, and feeds back to the electrical control system 6 to measure and control the temperature field in real time through the measurement and control integrated module 602.

Step 5: The vibration excitation hammer 403 is controlled by the electrical control system 6, excites the test piece 5, and returns to the electrical control system 6 in real time through the measurement and control integrated module 602 to control the excitation parameters.

Step 6: When the test is over, the electrical control system 6 stops the power output of the quartz lamp 305 . After the test piece and the device are cooled to normal temperature, the cooling water supply system 8 and the cooling gas supply system 7 are stopped in sequence, and the test is ended.

Among them, the advanced ceramic protective coating protects the vibration excitation device 4 and the key parts of the overall frame 1 from high temperature failure conditions.

Among them, the part of the quartz lamp 305 and the quartz tube 304 facing away from the test piece 5 adopts a ceramic reflective coating to improve the directional reflectivity of the quartz lamp and the resistance to high temperature.

Among them, the vibration excitation module 4 can be arranged in parallel with multiple modules on the rack to complete tasks such as multi-point excitation and random excitation.

Claims (10)

1. A high temperature random fatigue test device, characterized in that it comprises an integral frame (1), a test piece fixture (2), a quartz lamp heating array (3), a vibration excitation module (4), a test piece (5), An electrical control system (6), a cooling gas supply system (7) and a cooling water supply system (8); wherein, Both ends of the quartz lamp heating array (3) are mounted on the overall frame (1), the bottom of the test piece fixture (2) is mounted on the overall frame (1), and both ends of the test piece (5) pass through the test piece fixture (2) Fixing, so that the test piece (5) is located in the middle of the quartz lamp heating array (3), and several vibration excitation modules (4) are installed on the overall frame (1); The electrical control system (6) is used for supplying power to the quartz lamp heating array (3), the quartz lamp heating array (3) is used for heating the test piece (5), and the vibration excitation module (4) is controlled by the electrical control system (6), and uses It is used to excite the test piece (5); the cooling gas supply system (7) is used to provide cooling air for air-cooling the quartz lamp heating array (3); the cooling water supply system (8) is used to supply The frame (1), the test piece fixture (2) and the vibration excitation module (4) are water-cooled. 2. A kind of high temperature vibration fatigue test device according to claim 1, it is characterized in that, the whole frame (1) is provided with the frame cooling water channel (101) and is provided with the electronic measurement and control equipment cooling protection gas blowing outlet ( 102). 3. A high-temperature vibration fatigue test device according to claim 2, wherein the test piece fixture (2) comprises a fixture base (202) whose bottom is mounted on the overall frame (1), and a fixture base (202) mounted on the fixture base. The upper fixture (201) on the (202), the fixture base (202) and the upper fixture (201) are provided with fixture cooling water pipes (203), and the two ends of the test piece (5) pass through the two test piece fixtures (2) The upper clamp (201) is fixed. 4. A kind of high temperature vibration fatigue test device according to claim 3, is characterized in that, quartz lamp heating array (3) comprises quartz lamp mounting base, quartz lamp (305) and quartz pipeline (304), quartz lamp (305) ) is sheathed in the quartz pipe (304), the two ends are mounted on the overall frame (1) through the quartz lamp mounting base, and the quartz lamp (305) and the quartz lamp pipe (304) are nested to form a cooling air channel (303) . 5 . The high temperature vibration fatigue test device according to claim 4 , wherein the quartz lamp installation base comprises a quartz lamp installation lower base ( 301 ) and a quartz lamp installation upper base ( 302 ) which are used together. 6 . 6. A high-temperature vibration fatigue test device according to claim 4, characterized in that the vibration excitation module (4) comprises an excitation hammer base (401) fixed on the overall frame (1), and a vibration excitation A vibration excitation hammer (403) connected to a sliding pair of a hammer base (401) is provided with a vibration excitation hammer cooling water pipeline (404) in the vibration excitation hammer (403). 7 . The high-temperature vibration fatigue test device according to claim 6 , characterized in that, the surfaces of the excitation hammer base ( 401 ) and the excitation hammer ( 403 ) are coated with a zirconia thermal protection coating ( 402 ). 8 . 8. A high-temperature vibration fatigue test device according to claim 6, wherein the electrical control system (6) comprises a measurement and control integrated module (602) for measuring heating temperature, excitation amplitude, and stress distribution, and controls The vibration excitation hammer (403), the control signal line of the quartz lamp heating array (3), and the electrical control center for processing the signal. 9. A high-temperature vibration fatigue test device according to claim 8, wherein the cooling gas supply system (7) comprises a cooling gas supply center and a cooling gas; The cooling water supply system (8) includes a cooling water treatment center, and a cooling water outflow pipe (801) and a cooling water inflow pipe (802) for supplying circulating cooling water. 10. A high-temperature vibration fatigue test method, characterized in that, the method is based on a high-temperature vibration fatigue test device according to claim 9, comprising the following steps: Step 1: Fix the test piece (5) on the fixture base (202), and use the upper fixture (201) to fix the test piece (5); Step 2: Fix the mounting base of the quartz lamp, open the cooling gas supply system (7), and the cooling system supplies cooling and protective gas to the electronic measurement and control equipment used for cooling the measurement and control integrated module (602) through the cooling gas supply pipeline (701). a blow-off outlet (102) and a cooling air channel (303) for cooling the quartz lamp (305); Step 3: Open the cooling water supply system (8), the cooling water flows into the vibration hammer cooling water pipeline (404) inside the vibration hammer (403) through the cooling water outflow pipe (801) to cool it, and the cooling water passes through the rack The cooling water channel (101) is used for rack cooling, and the cooling water is cooled by the fixture (2) through the fixture cooling water pipe (203); Step 4: The electrical control system (6) supplies power to the quartz lamp (305), the quartz lamp (305) heats the test piece (5), and feeds back to the electrical control system (6) real-time measurement and control through the measurement and control integrated module (602) Temperature Field; The fifth step: the vibration excitation hammer (403) is controlled by the electrical control system (6), excites the test piece (5), and returns to the electrical control system (6) in real time through the measurement and control integrated module (602), to excite the test piece (5). Vibration parameter control; Step 6: At the end of the test, the electrical control system (6) stops the power output of the quartz lamp (305), and after the test piece and the device are cooled to normal temperature, the cooling water supply system (8) and the cooling gas supply system (7) are stopped in turn, The test is over.

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