CN115824542A - Thermal-vibration combined loading testing machine for sensed part - Google Patents
Thermal-vibration combined loading testing machine for sensed part Download PDFInfo
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- CN115824542A CN115824542A CN202211485520.7A CN202211485520A CN115824542A CN 115824542 A CN115824542 A CN 115824542A CN 202211485520 A CN202211485520 A CN 202211485520A CN 115824542 A CN115824542 A CN 115824542A
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Abstract
The application belongs to the technical field of engine tests, and particularly relates to a thermal vibration combined loading test machine for a sensed part. The testing machine comprises a vibration control and temperature acquisition system (1) which is provided with a vibration table; the test fixture (2) is fixed on the vibration table; the displacement mechanism (4) comprises a main frame positioned on two sides of the vibration table, a cross beam is arranged above the vibration table on the main frame, a lifting mechanism moving up and down is arranged on the cross beam, and a rotating mechanism is arranged at the bottom end of the lifting mechanism; the heating system (3) is fixed on the rotating mechanism and is provided with a cylinder body, and a heating cavity which is coaxial with the cylinder body is arranged in the cylinder body; one end of the sensed part is clamped on the test fixture, and the other end of the sensed part extends into the heating cavity. This application can realize receiving the stack of vibration load and the load of being heated in the three axial of portion of sensing, realizes the different experimental operating modes of high temperature vibration combination test, can carry out real-time supervision to the temperature measurement function of total temperature portion of sensing simultaneously experimental.
Description
Technical Field
The application belongs to the technical field of engine tests, and particularly relates to a thermal vibration combined loading test machine for a sensed part.
Background
The tester is an instrument and equipment for verifying whether the quality or performance of a material or a product meets the use requirement before the material or the product is put into use, and is mainly used for testing the physical performance of the material or the product. The tester directly provides specific environmental conditions and loading conditions, and indirectly provides guarantee for continuous innovation, improvement, optimization and perfection of products. In a broad sense, all instruments that perform quality or performance verification may be referred to as testers.
As a high-temperature, high-pressure and high-rotation-speed thermal machine in the industrial field, parts and accessories of the aircraft engine and the gas turbine are necessarily influenced by various adverse factors, so the product quality and the performance grade of the aircraft engine and the gas turbine must be fully checked before the key parts and accessories are used. The blade is taken as one of key parts of an engine, a large number of reports related to the research of a blade testing machine are reported at present, for example, chinese patent application numbers 201310073338.5 and 201310121074.6 propose non-contact vibration test and normal temperature vibration fatigue test of the blade, chinese patent application numbers 201610066802.1, 201810223573.9, 201821864222.8 and 201910263228.2 and the like successively propose devices and methods related to high temperature vibration test of the blade, and the contents of the patents have characteristics and show continuous and complete research trends. Besides the above patent studies, there are Zhang Dongming, liu Enjie, and other academic research papers on new methods for testing fatigue of turbine blades of aero-engines by high temperature vibration. Therefore, the key parts of the engine are closely related to two influence factors of high temperature and vibration brought by the engine. However, at present, there are few research reports on testing devices and equipment for other key engine parts besides blades.
Most of the tested sensitive parts for the engine are directly inserted into the flow channel from the outside of the engine casing, the sensitive parts are tested in severe environments such as high temperature, vibration and the like for a long time, and the cantilever type working state of the sensitive parts is concerned with the safe operation of the engine. Therefore, an auxiliary part such as a sensing part with an extremely high influence factor on the safety of the engine needs to simulate the actual service environment to evaluate the engine, and then the installation conclusion can be given. At present, only Chinese invention patent with application number 201810099010.3 introduces a normal-temperature vibration fatigue test device specially for an aeroengine sensing part, but can only perform fatigue test under normal temperature. The working temperature of most of the sensitive parts is more than 200 ℃, some high-temperature sensitive parts are more than 800 ℃, the working temperature of the tested sensitive parts at the turbine position can reach 1200 ℃ at most, and therefore, the fatigue test result under the normal temperature condition cannot represent the situation of the actual service environment of the sensitive parts. The Chinese invention patent with the application number of 201310105402.3 provides a fatigue cycle test device for an aircraft engine compressor blade, which comprises a high-frequency vibration loading assembly and is used for simulating high-frequency load borne by the aircraft engine compressor blade during working, and other patents with the application number of 201810188344.8 provide high-temperature vibration fatigue test schemes, but test objects are special material samples and cannot be directly used for a sensed part; although patent No. 201820163860.0 proposes a wide range of multifunctional testing machines, it lacks detailed description and is not operable. Therefore, it is necessary to invent a thermal vibration combined loading tester suitable for testing the examination test of the sensed part.
Disclosure of Invention
In order to solve one of the above problems, the present application provides a thermal and vibration combined loading testing machine for a sensing part, which mainly comprises:
a vibration control and temperature acquisition system having a vibration table;
the test fixture is fixed on the vibration table;
the displacement mechanism comprises main frames positioned on two sides of the vibration table, a cross beam is arranged above the vibration table on the main frames, a lifting mechanism moving up and down is arranged on the cross beam, a rotating mechanism is arranged at the bottom end of the lifting mechanism, and the rotating mechanism can be driven to rotate around a rotating shaft fixed at the bottom end of the lifting mechanism;
the heating system is fixed on the rotating mechanism and is provided with a cylinder body, and a heating cavity coaxial with the cylinder body is arranged in the cylinder body;
one end of the sensed part is clamped on the test fixture, and the other end of the sensed part extends into the heating cavity.
Preferably, the vibration control and temperature acquisition system further comprises an electrical cabinet and an upper computer, the electrical cabinet is connected with the vibration table and used for providing vibration force for the vibration table, and the upper computer is electrically connected with the sensing part and used for receiving a temperature value of a measuring point of the sensing part.
Preferably, the bottom end of the main frame is provided with a universal wheel which can move and be locked.
Preferably, a vibration sensor is fixed to the test jig.
Preferably, a penetration hole is further formed in the side wall of the cylinder body of the heating system, the penetration hole is communicated with the heating cavity, a laser displacement sensor is fixed on the rotating mechanism, and after the working end of the sensed part extends into the heating cavity, the working end of the sensed part can be sensed by the laser displacement sensor through the penetration hole.
Preferably, the laser displacement sensor is a blue laser displacement sensor.
Preferably, the thermal-vibration combined loading testing machine for the sensitive part further comprises a high-temperature protection system, the high-temperature protection system comprises an air conditioning injection mechanism, the air conditioning injection mechanism comprises a fixed end and an air conditioning injection end, the fixed end is fixed on the main frame, and the air conditioning injection end faces the clamping position of the sensitive part and the test fixture.
Preferably, the high-temperature protection system further comprises a high-temperature-resistant transparent material and a high-temperature-resistant heat-insulating material, the high-temperature-resistant transparent material is arranged in the entry hole, and the high-temperature-resistant heat-insulating material is arranged between the test fixture and the vibration table.
The key points of the application are as follows:
(1) The displacement mechanism 4 drives the heating system 3 to rotate through the rotating mechanism 4-3, so that superposition of a plurality of axial vibration loads and a plurality of heated loads on the test object is realized;
(2) The design form of the combined testing machine for the thermal vibration combined loading of the sensed part not only accords with the actual installation of a test object, but also is beneficial to cooling and protecting the tail part of the test object and preventing burning loss;
(3) The testing machine can detect the functional integrity of a test object in real time during testing;
(4) The high-temperature protection system of the testing machine can protect the tail of a test object and can protect equipment such as a laser displacement sensor, a vibration table and the like.
The advantages of the present application include:
(1) The testing machine can realize the superposition of vibration loads and heated loads in three axial directions of the sensed part, and realize different conditions of a high-temperature vibration combined test;
(2) The testing machine simulates a fixing mode of the service of the sensed part to carry out test clamping, so that the test result is closer to and reflects the actual condition;
(3) The testing machine can prevent the tail part of the sensed part, the sensor and the vibration table from being damaged by heat while realizing a high-temperature test at 1200 ℃, and ensures the integrity of a test object and equipment;
(4) The testing machine can monitor and record the working state of the temperature sensing part in real time in the process of implementing the thermal vibration combined test, and is convenient for checking the working reliability of the sensing part.
Drawings
FIG. 1 is a schematic horizontal state diagram of a testing machine according to a preferred embodiment of the thermal vibration combined loading testing machine for a sensed part.
Fig. 2 is a partially enlarged schematic view of the heating system and the peripheral structure according to the embodiment of the present application shown in fig. 1.
FIG. 3 is a schematic vertical state diagram of the testing machine according to another preferred embodiment of the thermal vibration combined loading testing machine for the sensing part.
The device comprises a vibration control and temperature acquisition system 1, a vibration table 1-1, an electric cabinet 1-2, an upper computer 1-3, a test fixture 2, a heating system 3, a heating cavity 3-1, an entry hole 3-2, a displacement mechanism 4-1, a main frame 4-2, a lifting mechanism 4-2, a rotating mechanism 4-3, a high-temperature protection system 5, a cold air injection mechanism 5-1, a high-temperature resistant transparent material 5-3, a high-temperature resistant thermal insulation material 6, a laser displacement sensor 7, a vibration sensor 8 and a sensitive part 8.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. 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 implementations that are part of this application and not all implementations. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
The application provides a thermal-vibration combined loading testing machine for a sensed part, which is specially used for meeting the requirements of a high-temperature vibration fatigue test and a high-temperature vibration environment test of a long rod-shaped sensed part: the multi-axis thermal vibration combined loading of the sensing part, the cantilever type clamping and fixing in the test process and the test temperature of the working end with the maximum temperature of 1200 ℃ are realized. Meanwhile, the testing machine can also prevent the tail of the sensed part from being burnt and damaged, and the real-time monitoring of the working state of the temperature measuring point is completed. As shown in fig. 1 to 3, the testing machine mainly includes:
a vibration control and temperature acquisition system 1 having a vibration table 1-1;
the test fixture 2 is fixed on the vibrating table 1-1;
the displacement mechanism 4 comprises a main frame 4-1 positioned on two sides of the vibrating table 1-1, a beam is arranged above the vibrating table 1-1 on the main frame 4-1, a lifting mechanism 4-2 moving up and down is arranged on the beam, a rotating mechanism 4-3 is arranged at the bottom end of the lifting mechanism 4-2, and the rotating mechanism 4-3 can be driven to rotate around a rotating shaft fixed at the bottom end of the lifting mechanism 4-2;
the heating system 3 is fixed on the rotating mechanism 4-3 and is provided with a cylinder body, and a heating cavity 3-1 which is coaxial with the cylinder body is arranged in the cylinder body;
one end of the sensitive part 8 is clamped on the test fixture 2, and the other end of the sensitive part extends into the heating cavity 3-1.
In some alternative embodiments, the bottom end of the main frame 4-1 is provided with universal wheels capable of moving and locking.
The heating system 3 is fixed on the rotating mechanism 4-3, the main frame 4-1 can move and lock freely, translation, rotation, ascending and descending of the heating system 3 can be achieved through matching of the main frame 4-1, the lifting mechanism 4-2 and the rotating mechanism 4-3, the sensed part 8 is centered in the heating cavity 3-1, and different types of test piece clamps 2 shown in the figure 1 or the figure 3 are used in a matching mode, and different axial thermal vibration combination loading can be achieved.
The rotating mechanism 4-3 of the present application mainly drives the heating system 3 to rotate, for example, the horizontal direction of the cylinder of the heating system 3 in fig. 1 is the vertical direction shown in fig. 3, or the vertical direction shown in fig. 3 is the horizontal direction shown in fig. 1, it can be understood that the rotating shaft is generally parallel to the cross beam, so that the heating system rotates around the rotating shaft in the vertical plane, in the embodiment shown in fig. 1, since the sensed part is horizontally placed, at this time, the rotating mechanism 4-3 drives the heating system to rotate so that the cylinder axis of the heating system is located in the horizontal direction, the sensed part 8 is transversely inserted into the heating cavity 3-1 of the heating system, in the embodiment shown in fig. 3, since the sensed part is vertically placed, at this time, the rotating mechanism 4-3 drives the heating system to rotate so that the cylinder axis of the heating system is located in the vertical direction, and the sensed part 8 is vertically inserted into the heating cavity 3-1 of the heating system.
In some optional embodiments, the vibration control and temperature acquisition system 1 further includes an electrical cabinet 1-2 and an upper computer 1-3, the electrical cabinet 1-2 is connected to the vibration table 1-1 and is configured to provide a vibration force for the vibration table 1-1, and the upper computer 1-3 is electrically connected to the sensed portion 8 and is configured to receive a temperature value of a measurement point of the sensed portion 8. In the embodiment, in the high-temperature test process, the vibration control and acquisition system 1 drives and controls the vibration table 1-1 through the upper computer 1-3 and the electrical cabinet 1-2, and meanwhile, the upper computer 1-3 also monitors and records the temperature value of a measuring point of the temperature sensing part in real time.
In some alternative embodiments, a vibration sensor 7 is fixed to the test fixture 2.
In some optional embodiments, the side wall of the cylinder of the warming system 3 is further provided with an entry hole 3-2, the entry hole 3-2 is communicated with the warming cavity 3-1, the rotating mechanism 4-3 is fixed with a laser displacement sensor 6, and after the working end of the sensitive part 8 extends into the warming cavity 3-1, the working end of the sensitive part 8 can be sensed by the laser displacement sensor 6 through the entry hole 3-2.
In some alternative embodiments, the laser displacement sensor 6 is a blue laser displacement sensor.
In the above embodiment, the laser displacement sensor 6 is fixed on the rotating mechanism 4-3 and is opposite to the working end of the sensing part 8 through the penetration hole 3-2. The vibration sensor 7 is fixed to the specimen holder 2 near the sensitive portion 8. The sensing part 8 is clamped in a fixed mode on an engine, and the working end of the sensing part 8 is kept in the heating cavity 3-1 to simulate a real service environment to carry out thermal vibration loading on the sensing part 8; the amplitude and the vibration frequency of the working end are monitored by using a laser displacement sensor 6, and the actual excitation input quantity of the vibration table 1-1 to the sensitive part 8 is adjusted by using a vibration sensor 7.
In some optional embodiments, the thermal-vibration combined loading testing machine for the sensed part further comprises a high-temperature protection system 5, wherein the high-temperature protection system 5 comprises a cold air injection mechanism 5-1, the cold air injection mechanism 5-1 comprises a fixed end and a cold air injection end, the fixed end is fixed on the main frame 4-1, and the cold air injection end faces to the clamping position of the quasi-sensed part 8 and the test fixture 2.
In some optional embodiments, the high temperature protection system 5 further comprises a high temperature resistant transparent material 5-2 and a high temperature resistant heat insulating material 5-3, the high temperature resistant transparent material 5-2 is disposed in the incident hole 3-2, and the high temperature resistant heat insulating material 5-3 is disposed between the test fixture 2 and the vibration table 1-1.
In addition, the material of the specimen holder 2 of the present application is a high temperature resistant alloy material.
The application provides a testing machine that can the hot joint loading that shakes for aeroengine and gas turbine test portion of being sensed, satisfies test needs such as portion of being sensed high temperature vibration fatigue and high temperature vibration environment to the quality of inspection portion of being sensed, appraises its life. The mode of the testing machine for clamping the test object, namely the sensing part, is consistent with the fixing mode of the testing machine for serving (mounting on an engine), and meanwhile, the testing machine can meet the testing requirement of the combination of the space triaxial vibration loading and the thermal load of the sensing part. The testing machine can carry out the thermal vibration combined loading test on the sensed part and can also carry out real-time state monitoring on the total temperature sensed part in the test process.
Although the present application has been described in detail with respect to the general description and specific embodiments, it will be apparent to those skilled in the art that certain modifications or improvements may be made based on the present application. Accordingly, such modifications and improvements are intended to be within the scope of this invention as claimed.
Claims (8)
1. The utility model provides a thermal-vibration combined loading testing machine of a sensing part, which is characterized in that includes:
a vibration control and temperature acquisition system (1) having a vibration table (1-1);
the test fixture (2) is fixed on the vibrating table (1-1);
the displacement mechanism (4) comprises main frames (4-1) positioned on two sides of the vibration table (1-1), a beam is arranged above the vibration table (1-1) of the main frames (4-1), a lifting mechanism (4-2) moving up and down is arranged on the beam, a rotating mechanism (4-3) is arranged at the bottom end of the lifting mechanism (4-2), and the rotating mechanism (4-3) can be driven to rotate around a rotating shaft fixed at the bottom end of the lifting mechanism (4-2);
the heating system (3) is fixed on the rotating mechanism (4-3) and is provided with a cylinder body, and a heating cavity (3-1) coaxial with the cylinder body is arranged in the cylinder body;
one end of the sensitive part (8) is clamped on the test fixture (2), and the other end of the sensitive part extends into the heating cavity (3-1).
2. The thermal-vibration combined loading testing machine for the sensed part according to claim 1, wherein the vibration control and temperature acquisition system (1) further comprises an electrical cabinet (1-2) and an upper computer (1-3), the electrical cabinet (1-2) is connected with the vibration table (1-1) and is used for providing a vibration force for the vibration table (1-1), and the upper computer (1-3) is electrically connected with the sensed part (8) and is used for receiving a measuring point temperature value of the sensed part (8).
3. The thermal-vibration combined loading testing machine for the sensed part according to claim 1, characterized in that the bottom end of the main frame (4-1) is provided with a universal wheel which can move and be locked.
4. The thermal-vibration combined loading tester for the sensed part according to claim 1, wherein a vibration sensor (7) is fixed on the test fixture (2).
5. The thermal-vibration combined loading testing machine for the sensitive part according to claim 1, characterized in that a penetration hole (3-2) is further formed in the side wall of the cylinder of the heating system (3), the penetration hole (3-2) is communicated with the heating cavity (3-1), a laser displacement sensor (6) is fixed on the rotating mechanism (4-3), and after the working end of the sensitive part (8) extends into the heating cavity (3-1), the working end of the sensitive part (8) can be sensed by the laser displacement sensor (6) through the penetration hole (3-2).
6. The thermal-vibration combined loading tester for the sensed part according to claim 5, wherein the laser displacement sensor (6) is a blue laser displacement sensor.
7. The thermal vibration combined loading testing machine for the sensitive part according to claim 5, further comprising a high temperature protection system (5), wherein the high temperature protection system (5) comprises a cold air spraying mechanism (5-1), the cold air spraying mechanism (5-1) comprises a fixed end and a cold air spraying end, the fixed end is fixed on the main frame (4-1), and the cold air spraying end faces to the clamping position of the quasi sensitive part (8) and the testing fixture (2).
8. The thermal-vibration combined loading tester for the sensed part according to claim 7, wherein the high temperature protection system (5) further comprises a high temperature resistant transparent material (5-2) and a high temperature resistant heat insulating material (5-3), the high temperature resistant transparent material (5-2) is arranged in the incident hole (3-2), and the high temperature resistant heat insulating material (5-3) is arranged between the test fixture (2) and the vibration table (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211485520.7A CN115824542A (en) | 2022-11-24 | 2022-11-24 | Thermal-vibration combined loading testing machine for sensed part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211485520.7A CN115824542A (en) | 2022-11-24 | 2022-11-24 | Thermal-vibration combined loading testing machine for sensed part |
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| Publication Number | Publication Date |
|---|---|
| CN115824542A true CN115824542A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211485520.7A Pending CN115824542A (en) | 2022-11-24 | 2022-11-24 | Thermal-vibration combined loading testing machine for sensed part |
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| CN (1) | CN115824542A (en) |
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- 2022-11-24 CN CN202211485520.7A patent/CN115824542A/en active Pending
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