CN118168805A - Double-wall turbine blade thermal mechanical fatigue test device - Google Patents
Double-wall turbine blade thermal mechanical fatigue test device Download PDFInfo
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- CN118168805A CN118168805A CN202410259163.5A CN202410259163A CN118168805A CN 118168805 A CN118168805 A CN 118168805A CN 202410259163 A CN202410259163 A CN 202410259163A CN 118168805 A CN118168805 A CN 118168805A
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- 238000009661 fatigue test Methods 0.000 title description 7
- 238000012360 testing method Methods 0.000 claims abstract description 52
- 238000005050 thermomechanical fatigue Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 58
- 238000009423 ventilation Methods 0.000 claims description 50
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000001788 irregular Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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Abstract
The present disclosure provides a double-walled turbine blade thermo-mechanical fatigue test device, this test device includes support frame, first anchor clamps, second anchor clamps, first pipe and second pipe, wherein: the first fixing columns and the second fixing columns which extend along the vertical direction and are distributed at intervals along the vertical direction are arranged in the supporting frame; the first clamp is fixed on one side of the first fixed column, which is close to the second fixed column, and is used for clamping the blade shroud of the blade; the first clamp is provided with a first hollow spiral tube; the second clamp is fixed on one side of the second fixed column, which is close to the first fixed column, and is used for clamping the blade root of the blade; the second clamp is provided with a second hollow spiral tube; the first guide pipe is connected with the first hollow spiral pipe and is used for conveying cold air into the first clamp through the first hollow spiral pipe; the second conduit is connected with the second hollow screw pipe and is used for conveying cold air into the second clamp through the second hollow screw pipe. The test device can enable the temperature fields of the inner wall and the outer wall to be attached to the temperature field of the real working condition.
Description
Technical Field
The disclosure relates to the technical field of structural design, in particular to a double-wall turbine blade thermo-mechanical fatigue test device.
Background
Thermal mechanical fatigue has a large influence on the reliability and life of turbine blades of aeroengines, and therefore research on the thermal mechanical fatigue life of turbine blades is essential. At present, the thermo-mechanical fatigue test generally adopts a solid round bar, a thin-walled round tube and a blade simulation piece which are regulated by standard samples, and only a very small amount of test is based on a real turbine blade. However, it is difficult to simulate the multiaxial stress states, temperature gradients, and the effects of manufacturing processes on the fatigue life of a real double-walled turbine blade during service based on standard test specimens and the thermal mechanical fatigue test of the blade simulator. Therefore, performing a thermal mechanical fatigue test of a real turbine blade is of great significance for life-prolonging research of turbine blades in design, analysis of blade faults and prevention.
In addition, the temperature load of the thermal mechanical fatigue test needs to be applied to the extremely high temperature of the blade, but the internal structure of the double-wall turbine blade is divided into an inner wall and an outer wall, and compared with the traditional blade, the condition of the temperature field of the inner wall and the outer wall of the blade is more complex, so that how to make the temperature field of the inner wall and the outer wall of the blade more fit the temperature field of the real working condition becomes a key problem.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The aim of the present disclosure is to overcome the defects in the prior art, and provide a thermal mechanical fatigue test device for a double-wall turbine blade, which can make the inner wall temperature field and the outer wall temperature field more fit with the real working condition temperature field, and ensure the accuracy of test results.
According to one aspect of the present disclosure, there is provided a double-walled turbine blade thermo-mechanical fatigue test apparatus, the blade comprising a shroud and a blade root, each of the shroud and the blade root having an impingement hole thereon, comprising:
The support frame is internally provided with a first fixed column and a second fixed column which extend along the vertical direction and are distributed at intervals along the vertical direction;
The first clamp is fixed on one side of the first fixing column, which is close to the second fixing column, and is used for clamping the blade shroud of the blade; the first clamp is provided with a first hollow spiral tube;
The second clamp is fixed on one side, close to the first fixed column, of the second fixed column and is used for clamping the blade root of the blade; the second clamp is provided with a second hollow spiral tube;
A first duct connected to the first hollow coil for delivering cool air into the first clamp through the first hollow coil;
And the second guide pipe is connected with the second hollow spiral pipe and is used for conveying cold air into the second clamp through the second hollow spiral pipe.
In an exemplary embodiment of the present disclosure, the test device further includes:
the first pressing part is sleeved on the first fixed column and can reciprocate along the first fixed column, and the first pressing part is fixedly connected with the first clamp;
the second pressing part is sleeved on the second fixing column and can reciprocate along the second fixing column, and the second pressing part is fixedly connected with the second clamp.
In an exemplary embodiment of the disclosure, the first conduit and the second conduit are hoses, the first conduit is at least partially disposed through the first pressing portion, and the second conduit is at least partially disposed through the second pressing portion.
In an exemplary embodiment of the disclosure, the first fixture includes a first clamping portion and a second clamping portion that are detachably connected, a surface of the first clamping portion adjacent to the second clamping portion is a concave surface, a surface of the second clamping portion adjacent to the first clamping portion is a concave surface, and the first clamping portion and the second clamping portion are opposite to each other and form a space for accommodating the tip shroud after being attached;
The first clamping part is provided with a first ventilation part, the second clamping part is provided with a second ventilation part, the first ventilation part and the second ventilation part are mutually attached after the first clamping part and the second clamping part are just opposite to each other, and the first ventilation part and the second ventilation part form the first hollow spiral tube.
In an exemplary embodiment of the present disclosure, the test device further includes:
And the fixing ring is sleeved on the peripheries of the first clamping part and the second clamping part.
In one exemplary embodiment of the present disclosure, the outer circumference of the first hollow coil is provided with a first external thread, through which the first hollow coil is screw-coupled with the first pressing part; the periphery of the second hollow screw tube is provided with a second external thread, and the second hollow screw tube is in threaded connection with the second pressing part through the second external thread.
In an exemplary embodiment of the present disclosure, the test device further includes:
the first hydraulic cylinder is arranged on the first fixed column, connected with the first pressing part and used for controlling the first pressing part to reciprocate along the first fixed column;
And the second hydraulic cylinder is arranged on the second fixed column, connected with the second pressing part and used for controlling the second pressing part to reciprocate along the second fixed column.
In an exemplary embodiment of the present disclosure, the test device further includes:
the first ventilation pipe is positioned outside the first pressing part and is connected with the end part of the first guide pipe, which is far away from the first hollow spiral tube;
The second ventilation pipe is positioned outside the second pressing part and is connected with the end part of the second guide pipe far away from the second hollow spiral pipe;
And the air supply device is connected with the end part of the first ventilation pipe far away from the first guide pipe and the end part of the second ventilation pipe far away from the first guide pipe and is used for conveying cold air to the first ventilation pipe and the second ventilation pipe.
In one exemplary embodiment of the present disclosure, the material of the retaining ring is a thermally insulating material.
In an exemplary embodiment of the present disclosure, the test device further includes:
and the heating device is sleeved on the periphery of the blade and is used for providing test temperature for the blade.
The double-walled turbine blade thermal mechanical fatigue test device of this disclosure, accessible first fixed column is fixed first anchor clamps, fixes the second anchor clamps through the second fixed column, and rethread first anchor clamps and second anchor clamps are fixed the blade. The first guide pipe is used for conveying cold air to the first hollow spiral tube, the second guide pipe is used for conveying the cold air to the second hollow spiral tube, the mode of conveying the cold air is similar to the actual working condition of the blade, the air flow mode is consistent, the cold air can enter between the double-layer walls of the blade through the blade root and the impact hole in the blade crown, when the cold air is filled between the inner wall and the outer wall of the blade, the inner wall and the outer wall of the blade can keep stable in temperature under the action of the cold air, the temperature field of the inner wall and the outer wall of the blade is attached to the temperature field of the actual working condition, the actual state of the blade in the working process can be simulated more truly, so that more accurate test data can be obtained, and the thermal mechanical fatigue life of the blade can be estimated accurately.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 is a schematic illustration of a double-walled turbine blade thermo-mechanical fatigue test apparatus in an embodiment of the present disclosure.
Fig. 2 is a schematic view of a first clamp in an embodiment of the present disclosure.
Fig. 3 is a schematic view of a first clamping portion according to an embodiment of the disclosure.
Fig. 4 is a schematic view of a second clamping portion in an embodiment of the disclosure.
Fig. 5 is a schematic view of a second clamp in an embodiment of the present disclosure.
In the figure: 100. a blade; 1. a support frame; 11. a first fixing column; 12. a second fixing column; 13. a cross beam; 14. a longitudinal beam; 2. a first clamp; 21. a first clamping part; 22. a second clamping portion; 23. a first hollow coil; 231. a first ventilation unit; 232. a second ventilation unit; 3. a second clamp; 31. a second hollow coil; 41. a first conduit; 42. a second conduit; 51. a first pressing portion; 52. a second pressing portion; 61. a first ventilation pipe; 62. a second ventilation pipe; 7. a gas supply device; 8. a heating device.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.
The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc. The terms "first" and "second" are used merely as labels, and are not intended to limit the number of their objects.
Turbine blades are key components of aircraft engines, whose primary function is to perform energy conversion, converting chemical energy stored in the combustion gases into mechanical energy for aircraft flight. The blades work in extremely severe environments for a long time, the high-temperature and high-pressure gas flowing out of the combustion chamber directly pushes the turbine to apply work, the flight state of the aircraft can change at any time along with specific conditions, the engine can continuously undergo the processes of starting, accelerating, decelerating, stopping and the like, and the temperature, the pressure and the rotor speed of the gas flowing out of the combustion chamber can continuously change along with the continuous change of the flight state of the aircraft, so that the temperature field and the mechanical load of the turbine blade are in dynamic change, and the turbine blade bears irregular transient temperature load and mechanical load. This fatigue phenomenon caused by the combined action of alternating temperature and mechanical loads is known as thermo-mechanical fatigue (TMF).
The double-walled turbine blade in embodiments of the present disclosure may include an inner solid wall provided with a plurality of impingement holes, an outer solid wall, and a microstructure unit; the outer layer solid wall and the inner layer solid wall are provided with gaps, and the microstructure units are arranged on the surface of the outer layer solid wall facing the inner layer solid wall so that one surface of the outer layer solid wall facing the inner layer solid wall is uneven. The double-layer wall has high heat exchange efficiency and light weight. It should be noted that the blade root (e.g., she Sunchi) and the shroud of the blade may be provided with at least one impingement hole, respectively.
The disclosed embodiments provide a double-walled turbine blade thermo-mechanical fatigue test apparatus, fig. 1 shows a schematic diagram of the disclosed double-walled turbine blade thermo-mechanical fatigue test apparatus, as shown in fig. 1, which may include a support frame 1, a first clamp 2, a second clamp 3, a first conduit 41, and a second conduit 42, wherein:
A first fixed column 11 and a second fixed column 12 which extend along the vertical direction and are distributed at intervals along the vertical direction are arranged in the support frame 1; the first clamp 2 is fixed on one side of the first fixing column 11, which is close to the second fixing column 12, and the first clamp 2 is used for clamping the shroud of the blade 100; the first clamp 2 is provided with a first hollow spiral tube 23; the second clamp 3 is fixed on one side of the second fixing column 12 close to the first fixing column 11, and the second clamp 3 is used for clamping the blade root of the blade 100; the second clamp 3 is provided with a second hollow spiral tube 31; the first duct 41 is connected to the first hollow coil 23 for feeding cool air into the first jig 2 through the first hollow coil 23; the second duct 42 is connected to the second hollow coil 31 for feeding cool air into the second holder 3 through the second hollow coil 31.
The double-wall turbine blade 100 thermo-mechanical fatigue test device disclosed by the disclosure can fix a first clamp 2 through a first fixing column 11, fix a second clamp 3 through a second fixing column 12, and fix the blade 100 through the first clamp 2 and the second clamp 3. The first conduit 41 is used for conveying cold air to the first hollow spiral tube 23, the mode of conveying the cold air is similar to the real working condition of the blade 100, the air flow mode is consistent, the second conduit 42 is used for conveying the cold air to the second hollow spiral tube 31, at the moment, the cold air can enter the space between the double-layer walls of the blade 100 through the blade root and the impact hole in the blade crown, when the space between the inner wall and the outer wall of the blade 100 is filled with the cold air, the inner wall and the outer wall of the blade 100 can keep stable in temperature under the action of the cold air, the temperature field of the inner wall and the outer wall of the blade 100 is attached to the temperature field of the real working condition, the real state of the blade 100 in the working process can be simulated more truly, so that more accurate test data can be obtained, and the thermal mechanical fatigue life of the blade 100 can be estimated accurately.
The following details the portions and specific details of the thermo-mechanical fatigue testing apparatus for a double-walled turbine blade 100 in an embodiment of the present disclosure:
As shown in fig. 1, the support frame 1 may be a frame structure, which may include two stringers 14 extending in a vertical direction, and two beams 13 connected between the two stringers 14, and the two beams 13 may extend in a horizontal direction, which is perpendicular to the vertical direction.
In some embodiments of the present disclosure, the support frame 1 may further include a first fixing post 11 and a second fixing post 12, the first fixing post 11 may extend in a vertical direction, and a cross section of the first fixing post 11 may be circular, elliptical, rectangular, polygonal, or irregular, which is not particularly limited herein. The second fixing post 12 may also extend in the vertical direction, and the shape of the cross section thereof may be the same as the shape of the cross section of the first fixing post 11, or may be different from the shape of the cross section of the first fixing post 11, and is not particularly limited herein.
The first fixing columns 11 and the second fixing columns 12 can be distributed in a vertically opposite direction and are distributed at intervals; the first fixing column 11 and the second fixing column 12 can be located between the two longitudinal beams 14, the end portion, away from the second fixing column 12, of the first fixing column 11 is fixedly connected with one cross beam 13, and the end portion, away from the first fixing column 11, of the second fixing column 12 is fixedly connected with the other cross beam 13.
As shown in fig. 1 and 2, the first clamp 2 may have a block shape, and may be fixed to a side of the first fixing post 11 near the second fixing post 12, where the first clamp 2 is used to clamp the shroud of the blade 100. The first clamp 2 is provided with a first hollow spiral tube 23, the first hollow spiral tube 23 is provided with a first open end and a second open end which are communicated with each other, and cold air can be conveyed into the first clamp 2 through the first hollow spiral tube 23 so as to enter between the inner wall and the outer wall of the blade 100 through the impact hole on the blade crown, and further, the temperature between the inner wall and the outer wall of the blade 100 is balanced, and the temperature field of the inner wall and the outer wall of the blade 100 is attached to the temperature field of a real working condition.
In an exemplary embodiment of the disclosure, as shown in fig. 3 and 4, the first fixture 2 may include a first clamping portion 21 and a second clamping portion 22 that are detachably connected, a surface of the first clamping portion 21 adjacent to the second clamping portion 22 is a concave surface, a surface of the second clamping portion 22 adjacent to the first clamping portion 21 is also a concave surface, the first clamping portion 21 and the second clamping portion 22 are opposite to each other to form a space for accommodating a shroud after being attached, an upper half portion of the first clamping portion 21 and an upper half portion of the second clamping portion 22 may tightly clamp the shroud of the blade 100 into the first fixture 2, and a lower half portion of the first clamping portion 21 and the second clamping portion 22 may be attached to an outer shape of the blade 100 and further clamp an upper portion of the blade 100 into the first fixture 2.
In some embodiments of the present disclosure, as shown in fig. 3, the first ventilation portion 231 is disposed on the first clamping portion 21, and the first ventilation portion 231 and the first clamping portion 21 may be in a unitary structure. As shown in fig. 4, the second clamping portion 22 is provided with a second ventilation portion 232, and the second ventilation portion 232 and the second clamping portion 22 may be in an integrated structure. When the first clamping portion 21 and the second clamping portion 22 are opposite to each other, the first ventilation portion 231 and the second ventilation portion 232 are also opposite to each other, and the first ventilation portion 231 and the second ventilation portion 232 are opposite to each other, so as to form the first hollow coil 23.
In an exemplary embodiment of the present disclosure, the test apparatus of the present disclosure may further include a fixing ring (not shown in the drawings), which may be in a ring shape, which may be sleeved on the outer circumferences of the first clamping portion 21 and the second clamping portion 22, and the first clamping portion 21 and the second clamping portion 22 may be fastened by the fixing ring, so as not to affect the stability of fixing the blade 100 due to the separation of the first clamping portion 21 and the second clamping portion 22 during the test. The material of the retaining ring may be a thermally insulating material to prevent heat from the interior of the blade 100 from being conducted away during testing to affect the test results.
As shown in fig. 5, the second fixture 3 may have a block shape, and may be fixed to a side of the second fixing post 12 near the first fixing post 11, and the second fixture 3 is used for clamping the blade root of the blade 100. The second clamp 3 is provided with a second hollow spiral tube 31, the second hollow spiral tube 31 is provided with two mutually communicated open ends, and cold air can be conveyed into the second clamp 3 through the second hollow spiral tube 31 so as to enter between the inner wall and the outer wall of the blade 100 through the impact hole on the blade root, and further, the temperature between the inner wall and the outer wall of the blade 100 is balanced, so that the temperature fields of the inner wall and the outer wall of the blade 100 are attached to the temperature field of the real working condition. That is, the cold air can enter the blade 100 from the impact hole on the blade root and the impact hole on the blade crown at the same time, which is helpful to accelerate the speed of injecting the cold air into the blade 100, shorten the test time and improve the test efficiency; and the above-described manner of delivering cool air is similar to the actual operation of the blade 100, and the air flow is identical.
In some embodiments of the present disclosure, the first jig 2 and the second jig 3 may be formed by finishing to reduce dimensional errors and to make the inner surfaces of the first jig 2 and the second jig 3 fit as closely as possible to the surface of the tip shroud or the blade root while ensuring airtightness. Because the air tightness of the blade 100 is also better, the tolerance of the first clamp 2 and the second clamp 3 is small, the air tightness cannot be influenced after the first clamp and the second clamp are connected with the blade 100, and the cold air entering the blade 100 can rapidly cool the inner wall and the outer wall, so that the inner wall and the outer wall are full of air, and the temperature field of the inner wall and the outer wall of the blade 100 is attached to the temperature field of the real working condition.
It should be noted that, the shroud and the root of the blade 100 are clamped in the first clamp 2 and the second clamp 3, respectively, but the middle region of the blade 100 may be exposed, i.e., the middle region of the blade 100 is not in contact with the clamps. In addition, the dimensions of the first jig 2 and the second jig 3 may be designed according to the size of the blade 100, as long as the inner surface of the first jig 2 is fitted to the shroud of the blade 100 and the inner surface of the second jig 3 is fitted to She Sunchi of the blade 100.
With continued reference to fig. 2, the first conduit 41 may be connected to the first hollow coil 23, the first conduit 41 may extend into the first hollow coil 23, and cold air may be delivered into the first fixture 2 through the first conduit 41; with continued reference to fig. 5, the second duct 42 may be connected to the second hollow coil 31, the second duct 42 may extend into the second hollow coil 31, and cold air may be delivered into the second fixture 3 through the second duct 42.
In an exemplary embodiment of the present disclosure, please continue to refer to fig. 1, the test apparatus of the present disclosure may further include a first pressing portion 51 and a second pressing portion 52, wherein:
The first pressing portion 51 may have a block shape, and the first pressing portion 51 may be sleeved on the first fixing column 11 and may reciprocate up and down along the first fixing column 11. The first pressing part 51 can be fixedly connected with the first clamp 2, the first clamp 2 can be driven to move in the process that the first pressing part 51 reciprocates along the first fixing column 11, and when the first pressing part 51 moves to one side close to the second fixing column 12, mechanical load can be applied to the shroud of the blade 100 through the first clamp 2, so that the purpose of applying mechanical load to the blade 100 in the test process is achieved.
In some embodiments of the present disclosure, the test device of the present disclosure may further include a first hydraulic cylinder (not shown in the drawings) which may be fixed to the first fixed column 11 and connected to the first pressing part 51, and the first pressing part 51 may be controlled to reciprocate along the first fixed column 11 by the first hydraulic cylinder.
In some embodiments of the present disclosure, the outer circumference of the first hollow coil 23 may be provided with a first external thread, a side of the first pressing part 51 adjacent to the first clamp 2 may be provided with a first coupling hole (not shown), and an internal thread may be provided in the first coupling hole, and after the first guide tube 41 is coupled with the first hollow coil 23, the first hollow coil 23 may be screw-coupled with the first coupling hole in the first pressing part 51 through the first external thread. The first conduit 41 may be a hose, at least a portion of the first conduit 41 may be disposed through the first pressing portion 51, and two ends of the first conduit 41 may be located outside the first pressing portion 51, respectively.
The second pressing portion 52 may also be in a block shape, and the second pressing portion 52 may be sleeved on the second fixing column 12 and can reciprocate up and down along the second fixing column 12. The second pressing portion 52 may be fixedly connected to the second fixture 3, and the second pressing portion 52 may drive the second fixture 3 to move during the reciprocating movement of the second pressing portion 52 along the second fixing post 12, and when the second pressing portion 52 moves to a side close to the first fixing post 11, a mechanical load may be applied to the blade root (e.g., she Sunchi) of the blade 100 by the second fixture 3, so as to achieve the purpose of simultaneously applying a mechanical load to the blade 100 by the first fixture 2 and the second fixture 3 during the test.
In some embodiments of the present disclosure, the test device of the present disclosure may further include a second hydraulic cylinder (not shown in the drawings) that may be fixed to the second fixed column 12 and connected to the second pressing part 52, and the second pressing part 52 may be controlled to reciprocate along the second fixed column 12 by the second hydraulic cylinder.
In some embodiments of the present disclosure, the outer circumference of the second hollow coil 31 may be provided with a second external thread, a side of the second pressing part 52 adjacent to the second clamp 3 may be provided with a second coupling hole (not shown), and an internal thread may be provided in the second coupling hole, and after the second guide tube 42 is coupled with the second hollow coil 31, the second hollow coil 31 may be screw-coupled with the second coupling hole in the second pressing part 52 through the second external thread. The second conduit 42 may be a hose, at least a portion of the second conduit 42 may be disposed through the second pressing portion 52, and two ends of the second conduit 42 may be located outside the second pressing portion 52, respectively.
In one exemplary embodiment of the present disclosure, the test device of the present disclosure may further include a first ventilation pipe 61, a second ventilation pipe 62, and an air supply device 7, wherein:
The first ventilation tube 61 may be located outside the first pressing portion 51, and one end thereof may be connected to an end of the first guide tube 41 remote from the first hollow coil 23. The cross section of the first ventilation pipe 61 may be circular, elliptical, rectangular, polygonal, or irregular, and is not particularly limited herein. The first vent tube 61 may be in sealing engagement with the first conduit 41. The first ventilation pipe 61 may be a hose or a rigid tubular structure, and is not particularly limited herein.
The second ventilation tube 62 may be located outside the second pressurizing part 52, and one end thereof may be connected to an end of the second guide tube 42 remote from the second hollow coil 31. The cross section of the second ventilation duct 62 may be circular, elliptical, rectangular, polygonal or irregular, and is not particularly limited herein. The second vent tube 62 may be in sealing engagement with the second conduit 42. The second ventilation duct 62 may be a hose or a rigid tubular structure, and is not particularly limited herein.
The air supply device 7 may be used for carrying cool air, and the air supply device 7 may be connected to an end of the first ventilation duct 61 away from the first duct 41 and an end of the second ventilation duct 62 away from the second duct 42, and may supply cool air to the first ventilation duct 61 and the second ventilation duct 62 through the air supply device 7.
In an exemplary embodiment of the present disclosure, the test apparatus of the present disclosure may further include a heating device 8, the heating device 8 may be sleeved on the outer circumference of the blade 100, and a test temperature may be provided to the blade 100 through the heating device 8, thereby providing a temperature load acting on the blade 100 during the test.
The following describes in detail the use process of the double-wall turbine blade thermo-mechanical fatigue test device of the present disclosure:
In the use process, the shroud of the double-wall turbine blade 100 can be inserted into the first clamping part 21, and then the second clamping part 22 is attached to the first clamping part 21, so that the inner walls of the first clamping part 21 and the second clamping part 22 are both attached to the shroud, and then the peripheries of the first clamping part 21 and the second clamping part 22 are sleeved with the fixing ring from bottom to top for reinforcement. After the first guide tube 41 is passed through the first pressing part 51 and one end of the first guide tube 41 is connected to the first hollow coil 23, the first hollow coil 23 is rotated so that the first hollow coil 23 is screw-coupled with the first coupling hole of the first pressing part 51. Subsequently, after passing the second guide tube 42 through the second pressing part 52 and connecting one end of the second guide tube 42 to the second hollow coil 31, the second hollow coil 31 is rotated to screw the second hollow coil 31 with the second connection hole on the second pressing part 52. After the direction of the first jig 2 and the second jig 3 is adjusted by rotation, the blade tenon tooth end of the blade 100 is slowly pushed into the second jig 3 in the longitudinal direction. Finally, axial pretension force is provided through the first hydraulic rod and the second hydraulic rod, after the blade 100 is stabilized, the heating device 8 wraps the blade 100, temperature load is applied through the heating device 8, and meanwhile, cold air can be conveyed into the blade 100 through the first conduit 41, the second conduit 42, the first ventilation pipe 61 and the second ventilation pipe 62 through the air supply device 7, so that the temperature field of the inner wall and the outer wall of the blade 100 can be adjusted. The test device disclosed by the invention can truly simulate the thermo-mechanical fatigue process of the double-wall turbine blade 100, and is beneficial to improving the accuracy of test research results.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. Double-walled turbine blade thermomechanical fatigue test device, the blade includes shroud and blade root, the shroud with all have impact hole on the blade root, its characterized in that includes:
The support frame is internally provided with a first fixed column and a second fixed column which extend along the vertical direction and are distributed at intervals along the vertical direction;
The first clamp is fixed on one side of the first fixing column, which is close to the second fixing column, and is used for clamping the blade shroud of the blade; the first clamp is provided with a first hollow spiral tube;
The second clamp is fixed on one side, close to the first fixed column, of the second fixed column and is used for clamping the blade root of the blade; the second clamp is provided with a second hollow spiral tube;
A first duct connected to the first hollow coil for delivering cool air into the first clamp through the first hollow coil;
And the second guide pipe is connected with the second hollow spiral pipe and is used for conveying cold air into the second clamp through the second hollow spiral pipe.
2. The test device of claim 1, further comprising:
the first pressing part is sleeved on the first fixed column and can reciprocate along the first fixed column, and the first pressing part is fixedly connected with the first clamp;
the second pressing part is sleeved on the second fixing column and can reciprocate along the second fixing column, and the second pressing part is fixedly connected with the second clamp.
3. The test device of claim 2, wherein the first conduit and the second conduit are each a hose, the first conduit is at least partially disposed through the first pressure application portion, and the second conduit is at least partially disposed through the second pressure application portion.
4. The test device according to claim 1, wherein the first clamp comprises a first clamping part and a second clamping part which are detachably connected, the surface of the first clamping part, which is close to the second clamping part, is a concave surface, the surface of the second clamping part, which is close to the first clamping part, is a concave surface, and the first clamping part and the second clamping part are opposite to each other and form a space for accommodating the tip shroud after being attached;
The first clamping part is provided with a first ventilation part, the second clamping part is provided with a second ventilation part, the first ventilation part and the second ventilation part are mutually attached after the first clamping part and the second clamping part are just opposite to each other, and the first ventilation part and the second ventilation part form the first hollow spiral tube.
5. The test device of claim 4, further comprising:
And the fixing ring is sleeved on the peripheries of the first clamping part and the second clamping part.
6. The test device according to claim 2, wherein a first external thread is provided on the outer periphery of the first hollow coil, and the first hollow coil is screwed with the first pressing portion by the first external thread; the periphery of the second hollow screw tube is provided with a second external thread, and the second hollow screw tube is in threaded connection with the second pressing part through the second external thread.
7. The test device of claim 2, further comprising:
the first hydraulic cylinder is arranged on the first fixed column, connected with the first pressing part and used for controlling the first pressing part to reciprocate along the first fixed column;
And the second hydraulic cylinder is arranged on the second fixed column, connected with the second pressing part and used for controlling the second pressing part to reciprocate along the second fixed column.
8. The test device of claim 2, further comprising:
the first ventilation pipe is positioned outside the first pressing part and is connected with the end part of the first guide pipe, which is far away from the first hollow spiral tube;
The second ventilation pipe is positioned outside the second pressing part and is connected with the end part of the second guide pipe far away from the second hollow spiral pipe;
And the air supply device is connected with the end part of the first ventilation pipe far away from the first guide pipe and the end part of the second ventilation pipe far away from the first guide pipe and is used for conveying cold air to the first ventilation pipe and the second ventilation pipe.
9. The test device of claim 1, wherein the material of the retaining ring is a thermally insulating material.
10. The test device of any one of claims 1-9, wherein the test device further comprises:
and the heating device is sleeved on the periphery of the blade and is used for providing test temperature for the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410259163.5A CN118168805A (en) | 2024-03-07 | 2024-03-07 | Double-wall turbine blade thermal mechanical fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410259163.5A CN118168805A (en) | 2024-03-07 | 2024-03-07 | Double-wall turbine blade thermal mechanical fatigue test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118168805A true CN118168805A (en) | 2024-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410259163.5A Pending CN118168805A (en) | 2024-03-07 | 2024-03-07 | Double-wall turbine blade thermal mechanical fatigue test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118168805A (en) |
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2024
- 2024-03-07 CN CN202410259163.5A patent/CN118168805A/en active Pending
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