Turbine guide vane thermal fatigue testing device

Abstract

The invention discloses a thermal fatigue testing device for a turbine guide vane. The thermal fatigue testing device comprises a base; the heating module comprises a profiling wire of which the shape is matched with the cross section of the to-be-tested piece and a power supply for driving the profiling wire to generate an induction heating magnetic field through alternating current; the axis height of the annular track is aligned with that of the profiling wire, and the annular track surrounds the periphery of the profiling wire; at least one independent temperature control module, each independent temperature control module is movably arranged on the annular track, and the local temperature of the to-be-tested piece is controlled by adjusting the magnetic field intensity of the corresponding section on the profiling wire through magnetic shielding; and at least one temperature detection module, wherein each temperature detection module is used for collecting temperature distribution data in real time. Through multi-area independent temperature control, non-uniform temperature gradient loading of the front edge area, the middle section area and the tail edge area of the turbine guide blade is achieved, and the thermal stress field of the blade under the real engine working condition is accurately simulated.

Description

Technical Field

[0001] This specification relates to a thermal fatigue testing device for turbine guide blades, which belongs to the technical field of aerospace engines and can also be applied to thermal fatigue testing of other high-temperature parts in high-temperature environments. Background Art

[0002] As aircraft engines develop towards high thrust-to-weight ratio and high reliability, turbine blades, as key components of the hot end, need to withstand repeated thermal stress under extreme temperature gradients. At present, the industry generally adopts gas heating (such as high-temperature gas in the combustion chamber) or radiation heating (such as quartz lamp array) to conduct thermal shock tests, simulating engine start-stop conditions through periodic high-temperature-low-temperature cycles. For example, traditional test equipment uses front and rear water spray rings to achieve rapid cooling, combined with the high-temperature gas generated by the combustion chamber to load the heat load, and can complete thousands of thermal shock cycle tests. In the existing technology, the test equipment mostly uses integrated temperature field control, monitors the gas temperature through a total temperature probe, and uses a water jacket structure to achieve test section cooling. In addition, some improvement schemes improve temperature uniformity by adjusting the test section channel structure (such as adding vortex suppression holes and adding a steady flow section).

[0003] However, conventional thermal shock test equipment has significant drawbacks. Due to the geometric differences in the leading edge, mid-chord, and trailing edge regions of turbine guide vanes, these regions develop non-uniform temperature fields under actual engine operating conditions (e.g., the leading edge experiences higher temperatures due to direct gas impact). Existing test equipment can only provide a uniform temperature field or a loading method based on an overall average temperature. For example, when using gas heating, the combustion chamber outlet temperature field is poorly uniform, requiring repeated parameter adjustments while still failing to match the local thermal load distribution of the blade. While radiant heating allows for zoned temperature control, it lacks precise temperature field control for the blade's three-dimensional curved surface structure. This temperature field distortion causes the thermal stress distribution during testing to deviate from actual operating conditions, thereby affecting the accuracy of thermal fatigue life assessment. Therefore, there is an urgent need to develop a test equipment that can independently control the temperature gradients in the leading, mid-section, and trailing edge regions based on the turbine guide vane's shape characteristics. This would enable more accurate thermal load coupling simulations and enhance the engineering value of the test data. Summary of the Invention

[0004] This specification provides a turbine guide vane thermal fatigue test device, which aims to achieve non-uniform temperature gradient loading in the leading edge, middle section and trailing edge areas of the turbine guide vane through independent temperature control in multiple zones, and accurately simulate the thermal stress field of the blade under real engine operating conditions.

[0005] The present specification discloses a thermal fatigue testing device for turbine guide blades, comprising: a base; a heating module, the heating module comprising a contoured wire horizontally arranged above the base and a power supply mounted on the base, the shape of the contoured wire matching the cross-section of the test piece, the power supply driving the contoured wire via alternating current to generate an induction heating magnetic field; an annular track, the annular track being vertically mounted above the base via a support, the axis of the annular track being aligned with the contoured wire and surrounding the outer circumference of the contoured wire; at least one independent temperature control module, each of the independent temperature control modules being movably mounted on the annular track and regulating the magnetic field strength of a corresponding section on the contoured wire through magnetic shielding to control the local temperature of the test piece; and at least one temperature detection module, each of the temperature detection modules being mounted on the base and maintaining a detection distance from the test piece for real-time acquisition of temperature distribution data.

[0006] In some embodiments, the system further includes a first lifting base, which is disposed on the base and is used to adjust the height of the test piece.

[0007] In some embodiments, the method further includes: a rotating seat connected between the first lifting seat and the base.

[0008] In some embodiments, the heating module is mounted on the base via a second lifting seat to achieve height adjustment of the heating module, and the lower end of each support member is mounted on the base via a third lifting seat to achieve height adjustment of the annular track.

[0009] In some embodiments, each of the independent temperature control modules includes: a ring track motor, which is movably disposed on the ring track to drive the independent temperature control module to move so as to adjust the local temperature of different parts of the test piece; a magnetic field shielding body, which is used to adjust the magnetic field strength of the corresponding section on the contoured wire by moving closer to or away from the contoured wire, thereby controlling the local temperature of the test piece; and a telescopic member, one end of the telescopic member is connected to the ring track motor, and the other end is connected to the magnetic field shielding body.

[0010] In some embodiments, each of the temperature detection modules includes: a vertical track, which is arranged on the base; a vertical track motor, which is movably arranged on the vertical track; and an infrared detector, which is arranged on the vertical track motor and faces the test piece.

[0011] In some embodiments, each of the temperature detection modules further includes: a horizontal track, which is disposed on the base; and a horizontal track motor, which is movably disposed on the horizontal track, and the lower end of the vertical track is disposed on the horizontal track motor, and the horizontal track motor drives the vertical track to translate when it translates on the horizontal track.

[0012] The embodiments of this specification can achieve at least the following beneficial effects:

[0013] 1. Through the coordinated action of the contoured wire and the independent temperature control module that can be moved on the circular track, non-uniform temperature gradient loading is achieved on the leading edge, middle section and trailing edge of the component to be tested (i.e., turbine blade), accurately simulating the transient thermal stress distribution under real engine operating conditions;

[0014] 2. The magnetic field shield can be moved closer to or further away from the contoured conductor to adjust the magnetic field strength of the corresponding section on the contoured conductor, thereby flexibly controlling the local temperature of the test piece to meet different test requirements;

[0015] 3. The magnetic-thermal coupling design achieves stepless regulation of local heat flux density by dynamically adjusting the magnetic shielding strength, avoiding temperature distortion caused by mechanical interference, while shortening the test cycle and reducing verification costs;

[0016] 4. Combined with the fixed-interval monitoring and closed-loop control of the non-contact temperature detection module, the fidelity of temperature field simulation is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a turbine guide vane thermal fatigue testing device 100 involved in some embodiments of this specification.

[0018] Figure 2 for Figure 1 A top view of the device 100 is shown.

[0019] Reference numerals:

[0020] 100. Turbine guide blade thermal fatigue test device; A. Base; 1. Power supply; 2. Contour conductor; 3. Test piece; 4. Annular track; 5. Telescopic member; 6. Annular track motor; 7. Vertical track; 8. Infrared detector; 9. Vertical track motor; 10. Magnetic field shield; 11. Horizontal track motor; 12. Horizontal track; 13. Support member; 14. First lifting seat. DETAILED DESCRIPTION

[0021] The technical solution of this specification is further described in detail below in conjunction with the accompanying drawings, but the protection scope of this specification is not limited to the following.

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of this specification clearer, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this specification. Therefore, the following detailed description of the embodiments of this specification provided in the drawings is not intended to limit the scope of this specification for which protection is sought, but merely represents the selected embodiments of this specification. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this specification.

[0023] In the description of this specification, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on this specification.

[0024] In this specification, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this specification based on specific circumstances.

[0025] In this specification, unless otherwise expressly specified or limited, if a first feature exists above or below a second feature, this may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. Furthermore, the phrases "above, above, and above the second feature" include the phrases "the first feature is directly above and obliquely above the second feature" or simply indicate that the first feature is higher in level than the second feature. If a first feature exists below, below, or below the second feature, this may include the phrases "the first feature is directly below and obliquely below the second feature" or simply indicate that the first feature is lower in level than the second feature.

[0026] The present invention will be further described below with reference to the embodiments. The embodiments described are only a part of the embodiments of the present invention and are not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of the present invention.

[0027] Please refer to the accompanying drawings. The drawings show the structure of an embodiment selected by the present invention. This is for illustration purposes only and the patent application is not limited to this structure.

[0028] Figure 1 Schematic diagram of the structure of a turbine guide vane thermal fatigue testing device 100 involved in some embodiments of this specification. Figure 2 for Figure 1 A top view of the device 100 is shown.

[0029] like Figure 1 、 Figure 2 As shown, in some embodiments, the device 100 may include a base A, a heating module, a circular track 4, at least one independent temperature control module and at least one temperature detection module.

[0030] The base A is used to provide support and mounting for various parts of the device 100. In some embodiments, the base A can be a table, a plate-like object, or other object that can provide a flat surface. In some embodiments, the base A can be the ground without the need for a special configuration.

[0031] The heating module is used to heat the test piece 3 through an induction heating magnetic field. The heating module may include a power supply 1 and a contoured conductor 2. The power supply 1 drives the contoured conductor 2 through an alternating current to generate an induction heating magnetic field, thereby heating the test piece 3.

[0032] In some embodiments, the power supply 1 can be installed on the base A. In some embodiments, the contoured wire 2 can be horizontally arranged above the base A. In some embodiments, since the contoured wire 2 itself is made of a relatively hard material, the power supply 1 can be installed on the base A and the height of the power supply itself can be horizontally arranged above the base A, such as Figure 1 shown.

[0033] In some embodiments, the contoured wire 2 can be provided above the base A through other components. In some embodiments, the contoured wire 2 can be provided above the base A using a height-adjustable lifting support, thereby achieving heating of different heights of the test piece 3 .

[0034] In some embodiments, the shape of the contoured wire 2 can match the cross-section of the test piece 3, enabling the induction heating magnetic field to be highly consistent with the three-dimensional curved surface geometric features of the test piece 3 (e.g., turbine guide blades), thereby forming a uniform and controllable induced eddy current distribution on the surface of the test piece 3.

[0035] This design of the contoured wire 2 in the aforementioned embodiment can avoid the problem of local overheating or insufficient heating caused by the use of flat or linear heating devices in traditional heating methods due to their inability to adapt to complex structures such as blade bending, twisting, and thin walls. It ensures that the heat flux density in key areas such as the leading edge, middle section, and trailing edge of the test piece 3 (such as a turbine guide vane) is consistent with the actual engine operating conditions, significantly improves the accuracy of temperature gradient loading, and provides basic support for reproducing the real thermal-mechanical coupling stress field.

[0036] In some embodiments, the heating module can be set on the base A through a second lifting seat (not shown in the figure) to achieve height adjustment of the heating module, and the lower end of each support member 13 is set on the base A through a third lifting seat (not shown in the figure) to achieve height adjustment of the circular track 4.

[0037] The test piece 3 may include but is not limited to turbine guide blades, and may also include, for example, turbine rotor blades, or other high-temperature parts on aircraft engines, or high-temperature parts in other scenarios on non-aircraft engines.

[0038] The annular track 4 is used to provide a moving track for the independent temperature control module, so that the independent temperature control module can shield the magnetic field strength of different sections on the contoured wire 2 by adjusting its position, thereby controlling and adjusting the local temperature of the test piece 3.

[0039] In some embodiments, the annular track 4 is vertically mounted above the base A via a support 13 . The axis of the annular track 4 is aligned with the contoured conductor 2 and surrounds the outer circumference of the contoured conductor 2 .

[0040] In some embodiments, the annular track 4 may be a circular annular track or an elliptical annular track.

[0041] The independent temperature control module is used to adjust the magnetic field intensity of the corresponding section on the contoured conductor 2 through magnetic shielding to control the local temperature of the test piece 3.

[0042] In some embodiments, at least one independent temperature control module may be provided on both sides of each key area, such as the leading edge, middle section, and trailing edge of the test piece 3. More precise control of the local temperature can be achieved by appropriately increasing the number of independent temperature control modules, for example, by providing two, three, four, or even more independent temperature control modules on both sides of each key area.

[0043] The specific number of independent temperature control modules can be flexibly adjusted based on the size and / or shape of the test piece 3. For example, the smaller the size of the test piece 3, the fewer independent temperature control modules can be used. For another example, the more complex the shape of the test piece 3, the more independent temperature control modules can be used.

[0044] Each independent temperature control module is movably arranged on the circular track 4.

[0045] In some embodiments, each independent temperature control module may include a ring track motor 6 , a magnetic field shield 10 and a telescopic member 5 .

[0046] The annular track motor 6 is used to drive the independent temperature control module to move so as to adjust the local temperature of different parts of the test piece 3 .

[0047] In some embodiments, the circular track motor 6 is movably disposed on the circular track 4 .

[0048] The magnetic field shield 10 is used to adjust the magnetic field intensity of a corresponding section on the contoured conductor 2 by moving closer to or farther away from the contoured conductor 2 , thereby controlling the local temperature of the test piece 3 .

[0049] In some embodiments, the magnetic field shielding body 10 may be made of ferrite or other objects capable of shielding a magnetic field. In some embodiments, the magnetic field shielding body 10 may be U-shaped, semicircular, or V-shaped, or may be other shapes.

[0050] The telescopic member 5 is used to drive the magnetic field shielding body 10 to move closer to or away from the contoured conductor 2 by telescoping.

[0051] In some embodiments, one end of the telescopic member 5 is connected to the annular orbit motor 6 , and the other end is connected to the magnetic field shield 10 .

[0052] In some embodiments, the telescopic member 5 may be an air cylinder, an oil cylinder, a servo motor or other devices capable of achieving telescopic movement.

[0053] The temperature detection module is used to collect temperature distribution data in real time. Each temperature detection module is installed on the base A and maintains a detection distance with the test piece 3.

[0054] The number of the temperature detection module is at least one. In some embodiments, a temperature detection module can be provided on both sides of the component to be detected 3 .

[0055] In some embodiments, the temperature detection module may include: a vertical track 7, a vertical track motor 9, and an infrared detector 8. In some embodiments, the temperature detection module may include: a vertical track 7, a vertical track motor 9, an infrared detector 8, a horizontal track 12, and a horizontal track motor 11.

[0056] The vertical track 7 and the vertical track motor 9 are used to drive the infrared detector 8 to move up and down, thereby facilitating the collection of temperature distribution data of different parts of the test piece 3 in the height direction.

[0057] In some embodiments, the vertical track 7 may be provided on the base A, and the vertical track motor 9 may be movably provided on the vertical track 7. The vertical track 7 and the vertical track motor 9 are adaptable when the height dimension of the test piece 3 is large.

[0058] The infrared detector 8 is used to collect infrared radiation signals of the test piece 3 , thereby determining temperature distribution data of the test piece 3 .

[0059] In some embodiments, the infrared detector 8 may be disposed on the vertical track motor 9 and directed toward the test piece 3 .

[0060] The horizontal track 12 and the horizontal track motor 11 are used to drive the translation of the infrared detector 8, thereby facilitating the collection of temperature distribution data of different parts of the test piece 3 in the width direction.

[0061] In some embodiments, the horizontal track 12 can be set on the base A, the horizontal track motor 11 can be movably set on the horizontal track 12, and the lower end of the vertical track 7 is set on the horizontal track motor 11. When the horizontal track motor 11 moves horizontally on the horizontal track 12, it drives the vertical track 7 to move horizontally.

[0062] In some embodiments, the apparatus 100 may further include a first lifting base 14, which is disposed on the base A and is used to adjust the height of the test piece 3. If the heating module, the independent temperature control module, and the circular track are unable to adjust the height, the first lifting base 14 can be used to move the test piece 3 up and down, thereby achieving heating of different height locations of the test piece 3.

[0063] In some embodiments, the apparatus 100 may further include a rotating base (not shown) in addition to the first lifting base 14 , and the rotating base is connected between the first lifting base 14 and the base A. Since the test piece 3 may have twisting in its height direction, it is necessary to rotate the test piece 3 appropriately during the process of lifting and lowering to better match the contoured wire 2 .

[0064] In some embodiments, the first lifting seat 14 is provided with a mortise and tenon matching the tenon at the lower end of the test piece 3, and also includes a tensile testing machine (not shown in the figure), which is used to apply tension to the upper end of the test piece 3 to simulate centrifugal force.

[0065] In some embodiments, the apparatus 100 may further include a control console (not shown). The control console may be used to control any combination of one or more of the power supply 1, the telescopic member 5, the circular track motor 6, the vertical track motor 9, the horizontal track motor 11, the first lifting seat 14, the second lifting seat, the third lifting seat, the tensile machine, the rotating seat, etc.

[0066] In some embodiments, the console can also display the temperature distribution data obtained by the infrared detector 8 according to the infrared radiation signal in an image format.

[0067] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Therefore, changes in illustrative values or substitutions of equivalent components should still fall within the scope of the present invention.

[0068] From the above detailed description, it will be clear to those skilled in the art that the present invention can indeed achieve the aforementioned objectives and is in compliance with the provisions of the Patent Law.

[0069] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all changes and modifications that fall within the scope of the invention. The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

[0070] It should be noted that the above description of the relevant processes is for illustration and purpose only and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to the processes under the guidance of this specification. However, such modifications and changes are still within the scope of this specification.

[0071] The basic concepts have been described above. It will be apparent to those skilled in the art after reading this application that the above disclosures are merely illustrative and do not constitute limitations on this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to this application. Such modifications, improvements, and amendments are suggested in this application and remain within the spirit and scope of the exemplary embodiments of this application.

[0072] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or more in different places in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0073] Similarly, it should be noted that in order to simplify the presentation of this disclosure and thereby facilitate understanding of one or more of the invention's embodiments, the foregoing descriptions of the embodiments of this disclosure sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this approach should not be interpreted as reflecting an intention that the claimed subject matter requires more features than expressly recited in each claim. Rather, the subject matter of the invention may possess fewer features than the single embodiment described above.

Claims

1. A turbine guide blade thermal fatigue testing device, characterized in that: include: base; A heating module, comprising a contoured wire horizontally disposed above the base and a power supply mounted on the base, wherein the shape of the contoured wire matches the cross-section of the test piece, and the power supply drives the contoured wire through an alternating current to generate an induction heating magnetic field; An annular track, the annular track being vertically mounted above the base through a support member, the axis height of the annular track being aligned with the contoured wire and surrounding the outer circumference of the contoured wire; At least one independent temperature control module, each of the independent temperature control modules is movably disposed on the annular track and adjusts the magnetic field strength of a corresponding section on the contoured wire through magnetic shielding to control the local temperature of the test piece; as well as At least one temperature detection module, each of which is mounted on the base and maintains a detection distance from the test piece, and is used to collect temperature distribution data in real time.

2. The turbine guide blade thermal fatigue testing device according to claim 1, characterized in that: Also includes: A first lifting seat is provided on the base and is used for adjusting the height of the test piece.

3. The turbine guide blade thermal fatigue testing device according to claim 2, characterized in that: Also includes: A rotating seat is connected between the first lifting seat and the base.

4. The turbine guide blade thermal fatigue testing device according to claim 1, characterized in that: The heating module is arranged on the base through a second lifting seat to achieve height adjustment of the heating module, and the lower end of each support member is arranged on the base through a third lifting seat to achieve height adjustment of the annular track.

5. The turbine guide blade thermal fatigue testing device according to claim 1, characterized in that: Each of the independent temperature control modules comprises: a ring track motor, the ring track motor being movably disposed on the ring track and driving the independent temperature control module to move so as to adjust the local temperature of different parts of the test piece; a magnetic field shielding body, the magnetic field shielding body being used to adjust the magnetic field strength of a corresponding section on the shaped wire by moving closer to or farther away from the shaped wire, thereby controlling the local temperature of the test piece; and A telescopic member, one end of which is connected to the annular track motor, and the other end of which is connected to the magnetic field shielding body.

6. The turbine guide blade thermal fatigue testing device according to claim 1, characterized in that: Each of the temperature detection modules comprises: A vertical track, the vertical track being arranged on the base; a vertical track motor, the vertical track motor being movably disposed on the vertical track; and An infrared detector is provided on the vertical track motor and faces the object to be tested.

7. The turbine guide blade thermal fatigue testing device according to claim 6, characterized in that: Each of the temperature detection modules further comprises: a horizontal track disposed on the base; and A horizontal track motor is movably arranged on the horizontal track, and the lower end of the vertical track is arranged on the horizontal track motor. When the horizontal track motor moves horizontally on the horizontal track, it drives the vertical track to move horizontally.

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