Mounting mechanism and test piece for high-temperature fatigue test

Abstract

The present application relates to the technical field of gas turbine, especially to a mounting mechanism and a sample for high-temperature fatigue test, comprising a mounting mechanism, a mounting cavity is opened at the bottom end of a clamp, and a threaded head is fixedly connected at the top end of the clamp, an operating assembly is arranged in the clamp, a positioning assembly is adaptively mounted in the clamp, and a limiting assembly is arranged in the clamp; when the sample needs to be installed with the clamp, an operator only needs to insert the sample into the mounting cavity and rotate the threaded rod all the time, so that the positioning, preliminary fixing and complete fixing of the sample can be easily realized, when disassembling, the threaded rod only needs to be reversed to complete the disassembling work, the mounting and dismounting of the sample can be completed through the mode of "one insertion and one rotation" and "one rotation and one pulling", the operation is convenient, and the stability after the sample is installed can be ensured.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, and in particular to an installation mechanism and a test sample for high-temperature fatigue testing. Background Technology

[0002] Turbine blades, as a key core component of gas turbines, operate under complex aerodynamic, mechanical, and high-temperature loads for extended periods. Frequent start-ups and shutdowns make them susceptible to various mechanical fracture failures, with fatigue failure being the primary mode. Therefore, fatigue performance analysis of turbine blades is a crucial means of ensuring gas turbine safety.

[0003] To clarify the fatigue performance of turbine blades during different maintenance cycles, researchers often conduct studies by sampling the turbine blades themselves. Because turbine blades have a hollow structure, complex geometry, and relatively thin walls, tests are often conducted using small-sized, plate-shaped, non-standard fatigue specimens and their matching fixtures. Currently, the main types of fixtures for these small-sized, plate-shaped, non-standard fatigue specimens are pin-fastened and clip-on types. Since pin-fastened fixtures require a pin hole drilled in the center of the clamping section, this hole can cause significant stress concentration for small-sized, plate-shaped, non-standard fatigue specimens with relatively thin walls, potentially leading to tearing of the pin hole during testing. Traditional clip-on type fixtures suffer from insufficient positioning accuracy and clamping force, and also have high requirements for the dimensions of the fixture materials. Summary of the Invention

[0004] In view of the problems of insufficient clamping force and tearing during the testing process in the above-mentioned prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide an installation mechanism.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a mounting component, comprising,

[0007] The mounting mechanism includes a mounting cavity formed at the bottom of the clamp and a threaded head fixedly connected to the top of the clamp. An operating component is provided inside the clamp, a positioning component is adapted to be installed inside the clamp, and a limit component is provided inside the clamp.

[0008] The mounting cavity is shaped like an inverted trapezoid.

[0009] As a preferred embodiment of the installation mechanism of the present invention, the operating component includes a threaded rod that is internally threaded to the threaded head, a hexagonal drive groove formed at the top of the threaded rod, and two sets of outer rings fixedly connected to the outside of the threaded rod, wherein a fixing member is provided inside the threaded rod.

[0010] As a preferred embodiment of the installation mechanism of the present invention, the fixing member includes a first spring rotatably connected to the top end of the threaded rod, an inner rod fixedly connected to the bottom end of the first spring, and a locking block fixedly connected to the bottom end of the inner rod, wherein a limit groove is formed on the outer side of the locking block;

[0011] The inner rod is slidably connected to the bottom end of the threaded rod, and the top end of the locking block is tapered.

[0012] As a preferred embodiment of the installation mechanism of the present invention, the positioning component includes a disc slidably connected inside the clamp, a connecting rod fixedly connected to the bottom end of the disc, and a bottom block fixedly connected to the bottom end of the connecting rod. A positioning block is provided on the outer side of the bottom end of the connecting rod, and an unlocking component is provided inside the positioning block.

[0013] The diameter of the base block is larger than the diameter of the connecting rod.

[0014] As a preferred embodiment of the installation mechanism of the present invention, the positioning block has an inner cavity, and an angled block is fixedly connected inside the inner cavity. The two sides of the positioning block are set as first inclined surfaces, and the angle of the first inclined surfaces is the same as that of the inverted trapezoidal inclined surface of the installation cavity. One end of the positioning block is set as an arc surface, and the angled block gradually tilts upward from the inside of the clamp to the outside of the clamp.

[0015] As a preferred embodiment of the installation mechanism of the present invention, the unlocking component includes a second spring fixedly connected inside the positioning block, a bent plate fixedly connected to one end of the second spring, and a round hole opened at the top of the bent plate.

[0016] In a preferred embodiment of the installation mechanism of the present invention, the inner diameter of the circular hole is the same as the outer diameter of the bottom block, and the curved plate is slidably connected inside the positioning block.

[0017] As a preferred embodiment of the installation mechanism of the present invention, the limiting component includes a third spring fixedly connected inside the clamp, a limiting rod fixedly connected to the other end of the third spring, and a short plate fixedly connected to the other end of the limiting rod.

[0018] The present invention also provides a test sample for high-temperature fatigue testing.

[0019] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a test sample for high-temperature fatigue testing, including the aforementioned mounting component, and further comprising,

[0020] The test component includes a test sample, card holes at both ends of the test sample, and second inclined surfaces at both ends of the test sample.

[0021] As a preferred embodiment of the test sample for high-temperature fatigue testing according to the present invention, the two ends of the test sample are set as semi-discs, and the inclination angle of the second inclined surface is the same as the inverted trapezoidal angle of the mounting cavity.

[0022] The beneficial effects of this invention include:

[0023] The mounting mechanism includes a mounting cavity formed at the bottom of the clamp and a threaded head fixedly connected to the top of the clamp. The clamp contains an operating component, a positioning component, and a limit component. When installing the sample onto the clamp, the operator simply inserts the sample into the mounting cavity and rotates the threaded rod to easily position, initially fix, and then completely secure the sample. Disassembly is also achieved by simply reversing the threaded rod. The installation and disassembly of the sample can be completed through a simple "insert and rotate" and "rotate and pull" method, facilitating operation while ensuring the stability of the installed sample. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0025] Figure 1 This is a schematic diagram of the overall installation of the present invention.

[0026] Figure 2 This is a schematic diagram of the overall sample of the present invention.

[0027] Figure 3 This is a side view of the sample of the present invention.

[0028] Figure 4 This is a schematic diagram of the overall installation mechanism of the present invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the mounting mechanism of the present invention.

[0030] Figure 6 This is an enlarged schematic diagram of part A of the present invention.

[0031] Figure 7 This is a schematic diagram of the operating components of the present invention.

[0032] Figure 8 This is a partial schematic diagram of the present invention.

[0033] Figure 9This is a cross-sectional schematic diagram of the present invention. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figures 1-9 This is the first embodiment of the present invention, which provides a mounting component, including,

[0039] The mounting mechanism 100 includes a mounting cavity 102 formed at the bottom of the clamp 101, and a threaded head 103 fixedly connected to the top of the clamp 101. An operating component 104 is provided inside the clamp 101, a positioning component 105 is adapted to be installed inside the clamp 101, and a limit component 106 is provided inside the clamp 101.

[0040] The installation cavity 102 has an inverted trapezoidal shape.

[0041] Specifically, the operating component 104 includes a threaded rod 104a that is internally threaded to the threaded head 103, a hexagonal drive groove 104b opened at the top of the threaded rod 104a, and two sets of outer rings 104c fixedly connected to the outside of the threaded rod 104a. A fixing member 104d is provided inside the threaded rod 104a.

[0042] Furthermore, the fastener 104d includes a first spring 104d-1 rotatably connected to the top of the threaded rod 104a, an inner rod 104d-2 fixedly connected to the bottom of the first spring 104d-1, and a locking block 104d-3 fixedly connected to the bottom of the inner rod 104d-2. A limiting groove 104d-4 is provided on the outer side of the locking block 104d-3.

[0043] The inner rod 104d-2 is slidably connected to the bottom end of the threaded rod 104a, and the top end of the locking block 104d-3 is set in a conical shape.

[0044] Preferably, the positioning component 105 includes a disc 105a slidably connected inside the clamp 101, a connecting rod 105b fixedly connected to the bottom end of the disc 105a, and a bottom block 105c fixedly connected to the bottom end of the connecting rod 105b. A positioning block 105d is provided on the outer side of the bottom end of the connecting rod 105b, and an unlocking component 105e is provided inside the positioning block 105d.

[0045] The diameter of the base block 105c is larger than the diameter of the connecting rod 105b.

[0046] It should be noted that the positioning block 105d has an inner cavity 105d-1 inside, and an angled block 105d-2 is fixedly connected inside the inner cavity 105d-1. The two sides of the positioning block 105d are set as first inclined surfaces 105d-3, and the angle of the first inclined surfaces 105d-3 is the same as that of the inverted trapezoidal inclined surface of the mounting cavity 102. One end of the positioning block 105d is set as an arc surface 105d-4. The angled block 105d-2 gradually tilts upward from the inside of the clamp 101 to the outside of the clamp 101.

[0047] Preferably, the unlocking component 105e includes a second spring 105e-1 fixedly connected inside the positioning block 105d, a bent plate 105e-2 fixedly connected to one end of the second spring 105e-1, and a round hole 105e-3 opened at the top of the bent plate 105e-2.

[0048] Preferably, the limiting component 106 includes a third spring 106a fixedly connected inside the clamp 101, a limiting rod 106b fixedly connected to the other end of the third spring 106a, and a short plate 106c fixedly connected to the other end of the limiting rod 106b.

[0049] One of the test samples for high-temperature fatigue testing includes mounting components, and also includes...

[0050] The test component 200 includes a test sample 201, a clasp 202 formed at both ends of the test sample 201, and a second inclined surface 203 formed on the sides of both ends of the test sample 201.

[0051] Preferably, the two ends of the test sample 201 are set as semi-discs, and the inclination angle of the second inclined surface 203 is the same as the inverted trapezoidal angle of the mounting cavity 102.

[0052] Insert the semi-circular disk at one end of the sample 201 into the mounting cavity 102 at the bottom of the fixture 101. Due to the inverted trapezoidal design of the mounting cavity 102 and the cooperation of the second inclined surface 203, the sample 201 is mounted at the bottom of the fixture 101. Insert an internal hex wrench into the hexagonal drive groove 104b, and then rotate it to drive the threaded rod 104a to rotate downward inside the threaded head 103. Since the locking block 104d-3 is positioned by the limiting rod 106b inserted into the limiting groove 104d-4, the threaded rod 104a that rotates downward will gradually compress the first spring 104d-1.

[0053] Since the inner side of the disc 105a is located between the two sets of outer rings 104c, the sliding threaded rod 104a drives the disc 105a to move with the cooperation of the outer rings 104c. The disc 105a then presses the bent plate 105e-2 through the connecting rod 105b, which eventually drives the positioning block 105d to slide down. The arc surfaces 105d-4 of the two sets of sliding positioning blocks 105d will gradually squeeze the semi-disc arc edge of the sample 201 until the first inclined surface 105d-3 of the positioning block 105d fits against the inner surface of the mounting cavity 102. At this time, the two sets of positioning blocks 105d will push the sample 201 to the center position of the mounting cavity 102, completing the centering operation to facilitate the progress of subsequent work.

[0054] As the positioning block 105d slides down, the beveled block 105d-2 in the inner cavity 105d-1 will press against the short plate 106c. Guided by the beveled block 105d-2, the limiting rod 106b will gradually slide away from the center of the clamp 101, while simultaneously pressing the third spring 106a. The sliding limiting rod 106b will slide out from the inside of the limiting groove 104d-4 after the first inclined surface 105d-3 of the positioning block 105d comes into contact with the inner surface of the mounting cavity 102. At this time, the locking block 104d-3 will be inserted into the locking hole 202 under the elasticity of the first spring 104d-1, thereby fixing the test sample 201.

[0055] In summary, when it is necessary to install the test sample 201, simply install the test sample 201 in the mounting cavity 102, and then rotate the threaded rod 104a to drive the positioning block 105d to position the test sample 201. After positioning, the test sample 201 is automatically fixed. The automatic positioning method ensures that the installation of the test sample 201 is more convenient and does not require manual positioning by personnel.

[0056] Example 2

[0057] Reference Figures 1-9 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides that the inner diameter of the circular hole 105e-3 is the same as the outer diameter of the bottom block 105c, and the bent plate 105e-2 is slidably connected inside the positioning block 105d.

[0058] When the limiting rod 106b completely leaves the limiting groove 104d-4, it will drive the short plate 106c to press the round hole 105e-3 on the surface of the bent plate 105e-2 to the bottom end of the bottom block 105c. At this time, rotating the threaded rod 104a will drive the connecting rod 105b and the bottom block 105c to slide down through the round hole 105e-3 without squeezing the positioning block 105d. At the same time, the sliding threaded rod 104a will continue to squeeze the first spring 104d-1. Under the continuous pressure of the first spring 104d-1, the tightness of the insertion of the locking block 104d-3 into the locking hole 202 will gradually increase. When the threaded rod 104a can no longer be turned, the installation of one end of the test sample 201 is completed.

[0059] The other end of the test sample 201 can be installed to another set of clamps 101 using the above method. Finally, the two sets of clamps are installed on the threaded end of the material tensile testing machine through the threaded head 103.

[0060] In summary, when it is necessary to install the test sample 201 with the fixture 101, the operator only needs to insert the test sample 201 into the mounting cavity 102 and continuously rotate the threaded rod 104a to easily achieve the positioning, initial fixation and complete fixation of the test sample 201. This facilitates operation and ensures the stability of the test sample 201 after installation, ensuring the normal progress of subsequent tests.

[0061] Example 3

[0062] Reference Figures 1-9 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a disassembly method:

[0063] After the test is completed, the operator reverses the threaded rod 104a using an Allen wrench, which causes the connecting rod 105b and the base block 105c to slide upwards. The upward-sliding base block 105c, with its rounded corner design, will press against the round hole 105e-3, thus ensuring that the base block 105c can be reset through the round hole 105e-3. When the top of the base block 105c contacts the inner top of the positioning block 105d, the upward-sliding base block 105c will drive the positioning block 105d to slide upwards. At this time, under the elasticity of the third spring 106a, the limiting rod 106b will be reset. With the tapered design of the top of the locking block 104d-3, it is ensured that the locking block 104d-3 can press against the limiting rod 106b during the reset process, and finally drive the limiting rod 106b to re-insert into the limiting groove 104d-4, completing the reset.

[0064] In summary, when installing the test sample 201 with the fixture 101, the operator only needs to insert the test sample 201 into the mounting cavity 102 and continuously rotate the threaded rod 104a to easily achieve the positioning, initial fixation, and complete fixation of the test sample 201. When disassembling, it is only necessary to reverse the threaded rod 104a to complete the disassembly work. The installation and disassembly of the test sample 201 can be completed by "inserting and rotating" and "rotating and pulling". This is convenient to operate and can ensure the stability of the test sample 201 after installation.

[0065] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0066] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0067] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mounting component, characterized in that: include, The mounting mechanism (100) includes a clamp (101), a mounting cavity (102) opened at the bottom end of the clamp (101), and a threaded head (103) fixedly connected to the top end of the clamp (101). An operating component (104) is provided inside the clamp (101), a positioning component (105) is adapted to be installed inside the clamp (101), and a limit component (106) is provided inside the clamp (101). The mounting cavity (102) is in the shape of an inverted trapezoid; The operating component (104) includes a threaded rod (104a) that is internally threaded to the threaded head (103), a hexagonal drive groove (104b) formed at the top of the threaded rod (104a), and two sets of outer rings (104c) fixedly connected to the outside of the threaded rod (104a). A fixing member (104d) is provided inside the threaded rod (104a). The fastener (104d) includes a first spring (104d-1) rotatably connected to the top of the inside of the threaded rod (104a), an inner rod (104d-2) fixedly connected to the bottom of the first spring (104d-1), and a locking block (104d-3) fixedly connected to the bottom of the inner rod (104d-2). The locking block (104d-3) has a limit groove (104d-4) on its outer side. The inner rod (104d-2) is slidably connected to the bottom end of the threaded rod (104a), and the top end of the locking block (104d-3) is set in a conical shape. The positioning component (105) includes a disc (105a) slidably connected inside the clamp (101), a connecting rod (105b) fixedly connected to the bottom end of the disc (105a), and a bottom block (105c) fixedly connected to the bottom end of the connecting rod (105b). A positioning block (105d) is provided on the outer side of the bottom end of the connecting rod (105b), and an unlocking component (105e) is provided inside the positioning block (105d). The diameter of the bottom block (105c) is larger than the diameter of the connecting rod (105b); The positioning block (105d) has an inner cavity (105d-1) inside, and a chamfered block (105d-2) is fixedly connected inside the inner cavity (105d-1). The two sides of the positioning block (105d) are set as first inclined surfaces (105d-3), and the first inclined surfaces (105d-3) have the same angle as the inverted trapezoidal inclined surface of the mounting cavity (102). One end of the positioning block (105d) is set as an arc surface (105d-4). The chamfered block (105d-2) gradually tilts upward from the inside of the clamp (101) to the outside of the clamp (101).

2. The mounting component as claimed in claim 1, characterized in that: The unlocking component (105e) includes a second spring (105e-1) fixedly connected inside the positioning block (105d), a bent plate (105e-2) fixedly connected to one end of the second spring (105e-1), and a round hole (105e-3) opened at the top of the bent plate (105e-2).

3. The mounting component as described in claim 2, characterized in that: The inner diameter of the circular hole (105e-3) is the same as the outer diameter of the bottom block (105c), and the bent plate (105e-2) is slidably connected inside the positioning block (105d).

4. The mounting component as described in claim 2 or 3, characterized in that: The limiting assembly (106) includes a third spring (106a) fixedly connected inside the clamp (101), a limiting rod (106b) fixedly connected to the other end of the third spring (106a), and a short plate (106c) fixedly connected to the other end of the limiting rod (106b).

5. A specimen for high-temperature fatigue testing, characterized in that: Including the mounting component as described in any one of claims 1 to 4, and further comprising, The test component (200) includes a test sample (201), card holes (202) opened at both ends of the test sample (201), and second inclined surfaces (203) opened on both sides of the test sample (201).

6. The test specimen for high-temperature fatigue testing as described in claim 5, characterized in that: The two ends of the test sample (201) are set as semi-discs, and the inclination angle of the second inclined surface (203) is the same as the inverted trapezoidal angle of the mounting cavity (102).

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