CN213239773U - Turbine blade high-temperature creep test system and test fixture thereof - Google Patents
Turbine blade high-temperature creep test system and test fixture thereof Download PDFInfo
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- CN213239773U CN213239773U CN202022096896.1U CN202022096896U CN213239773U CN 213239773 U CN213239773 U CN 213239773U CN 202022096896 U CN202022096896 U CN 202022096896U CN 213239773 U CN213239773 U CN 213239773U
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Abstract
An object of the utility model is to provide a turbine blade high temperature creep test system and test fixture thereof, it can be under the prerequisite that does not harm the blade body, realizes the centre gripping to different leaf profile blades. Another object of the present invention is to provide a turbine blade high temperature creep test system. To achieve the foregoing objective, a test fixture for clamping a turbine blade includes a clamping assembly, a blade body clamp including a blade basin clamping unit and a blade back clamping unit. The blade basin clamping unit comprises a first body part and a blade basin clamping part, and the blade basin clamping part is provided with a blade basin clamping surface which is conformal with a blade basin of the turbine blade to be clamped. The blade back clamping unit comprises a second body part and a blade back clamping part, and the blade back clamping part is provided with a blade back clamping surface which is conformal with the blade back of the turbine blade to be clamped. The first body part and the blade basin clamping part and the second body part and the blade back clamping part are respectively detachably connected.
Description
Technical Field
The utility model relates to a turbine blade high temperature creep test system and test fixture thereof.
Background
The turbine blade of the aircraft engine inevitably has creep deformation during operation due to long-term operation in a high-temperature environment, so that the deformation of the component exceeds a limit to influence the normal operation of the engine, or stress fracture occurs. Creep life is a major factor affecting the useful life of engine turbine blades. For the turbine blade, the load bearing during the actual working process is complex, including centrifugal force, aerodynamic force, temperature and the like. After the life of the blade is calculated through simulation analysis, test verification is needed. For single crystal materials, the mechanical properties measured by a standard test piece are different from those of a real blade, a creep test of the real blade needs to be carried out, and the method has great significance for life prediction and fault analysis in the design of the turbine blade.
The blade is subjected to secondary processing by the aid of the particularity of the single crystal material, so that local structural performance can be changed, the blade needs to be clamped by a special clamp, and the blade can bear high temperature and apply tensile load to the blade on the premise of not damaging the blade, and damage caused by centrifugal force is simulated.
However, the inventor finds that the existing test device cannot well clamp different blade profile structures, and therefore the clamping device itself damages the blades.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a test fixture, it can realize the centre gripping to different leaf profile blades under the prerequisite that does not harm the blade body.
Another object of the utility model is to provide a turbine blade high temperature creep test system, it includes aforementioned test fixture.
For realizing a test fixture of aforementioned purpose for centre gripping turbine blade, include first connector, second connector and connect in first connector with centre gripping subassembly between the second connector, centre gripping subassembly is including the blade root holder that is used for centre gripping blade root and the blade body holder that is used for centre gripping blade body, the blade body holder includes:
the blade basin clamping unit comprises a first body part and a blade basin clamping part, and the blade basin clamping part is provided with a blade basin clamping surface which is conformal with a blade basin of the turbine blade to be clamped; and the number of the first and second groups,
the blade back clamping unit comprises a second body part and a blade back clamping part, and the blade back clamping part is provided with a blade back clamping surface which is conformal with the blade back of the turbine blade to be clamped;
the first body part and the blade basin clamping part and the second body part and the blade back clamping part are respectively detachably connected.
In one or more embodiments, the blade basin clamping portion and the first body portion are connected by a fastener after being matched and positioned by the first positioning portion and the second positioning portion;
the blade back clamping part is connected with the second body part through a fastener after being matched and positioned by a third positioning part and a fourth positioning part;
the first positioning portion and the second positioning portion, and the third positioning portion and the fourth positioning portion are respectively in central symmetry with the gravity center of the turbine blade.
In one or more embodiments, the first positioning portion and the third positioning portion are positioning pins provided on the first body portion and the second body portion, respectively, and the second positioning portion and the fourth positioning portion are positioning holes provided in the blade basin clamping portion and the blade back clamping portion, respectively.
In one or more embodiments, a receiving groove is formed in the blade body clamp, the receiving groove conforming to the blade body and allowing the blade body to enter.
In one or more embodiments, the first body part comprises a blade-pot clamping block and a blade-pot clamping bar, and the second body part comprises a blade-back clamping block and a blade-back clamping bar;
a first connecting hole and a first groove part are formed in the leaf basin clamping block, a second connecting hole and a second groove part are formed in the leaf back clamping block, and a part of the first groove part and the second groove part after being in butt joint is used as the accommodating groove;
one end of the leaf basin clamping rod penetrates through the first connecting hole and then is arranged in the first groove part, the other end of the leaf basin clamping rod is provided with a first raised head, and the first raised head is detachably connected with the leaf basin clamping part; one end of the blade back clamping rod penetrates through the second connecting hole and then is arranged in the second groove part, the other end of the blade back clamping rod is provided with a second raised head, the second raised head is detachably connected with the blade back clamping part, and the first raised head and the bottom wall of the first groove part and the second raised head and the bottom wall of the second groove part are matched together to limit the range of opposite movement of the blade basin clamping rod and the blade back clamping rod.
In one or more embodiments, the first tab and the second tab are each hexahedral, and inner circumferential profiles of the first groove and the second groove conform to the first tab and the second tab, respectively.
In one or more embodiments, the blade root holder is a disk simulator having a tongue and groove structure consistent with the structure of the disk, so that the blade root holder and the blade root are connected in a tongue and groove fit manner.
In one or more embodiments, a water cooling channel is opened in the blade body clamp.
In one or more embodiments, the first connector is connected to the blade body clamp via a connection block, and the second connector is connected to the blade root clamp.
To achieve another object, the turbine blade high temperature creep test system comprises a tensile test bench, and is characterized by further comprising a test fixture as described above;
the two ends of the test fixture are connected with the tensile test bed through the first connector and the second connector respectively.
The utility model discloses an advance effect includes following one or combination:
can change the leaf basin clamping part and the leaf back clamping part of compact heap profile according to blade structure profile through the setting for anchor clamps do not receive the influence of blade configuration to the centre gripping of blade, have improved the general type of test fixture, avoid carrying out secondary operation to the blade and destroy the blade, avoid creep rupture appearing in the processing position, reduce the test result error. Meanwhile, the cost for replacing the clamp due to different blade structures can be reduced.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic front view of one embodiment of the present test fixture;
FIG. 2 illustrates a cross-sectional view of one embodiment of a blade body clamp;
FIG. 3 is an enlarged partial schematic view of FIG. 2;
FIG. 4 shows a schematic view from above of an embodiment of a blade body clamp;
fig. 5 shows a schematic sectional view of a blade body grip at another angle.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present disclosure. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
It should be noted that, where used, the following description of upper, lower, left, right, front, rear, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object.
It should be noted that these and other figures are given by way of example only and are not drawn to scale, and should not be construed as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.
To address one or more of the problems of the prior art described above, one aspect of the present invention is to provide a test fixture for holding a turbine blade.
Fig. 1 shows a schematic front view of an embodiment of the test fixture, which includes a first connector 1, a second connector 2, and a clamping assembly 3 connected between the first connector 1 and the second connector 2, wherein a turbine blade 4 is clamped and fixed by the clamping assembly 3.
Wherein the clamping assembly 3 comprises a root clamp 31 for clamping the root of the turbine blade 4 and a blade clamp 32 for clamping the blade of the turbine blade 4. It will be understood that reference herein to a blade root is to the dovetail portion of a turbine blade and a blade airfoil is to the portion of a turbine blade other than the root dovetail.
Fig. 2 shows a cross-sectional view of an embodiment of the blade body holder 32, and fig. 3 is an enlarged partial view of fig. 2. The blade body clamp 32 includes a blade bowl clamping unit 321 and a blade back clamping unit 322.
The bucket clamping unit 321 includes a first body portion 3211 and a bucket clamping portion 3212, the bucket clamping portion 3212 having a bucket clamping face 3212a conforming to a bucket of the turbine blade 4 to be clamped.
The back clamping unit 322 includes a second body portion 3221 and a back clamping portion 3222, the back clamping portion 3222 having a back clamping surface 3222a conforming to a back of the turbine blade 4 to be clamped.
With the above arrangement, the turbine blade 4 to be clamped is clamped by the blade bowl clamping surface 3212a and the blade back clamping surface 3222 a. The first body portion 3211 and the blade bowl clamping portion 3212, and the second body portion 3221 and the blade back clamping portion 3222 are detachably connected to each other, so that when the turbine blades 4 of different configurations need to be clamped, the blade bowl clamping portion 3212 and the blade back clamping portion 3222, which are respectively conformal to the turbine blades 4 of different configurations, are replaced, that is, the turbine blades 4 of different configurations can be clamped, and meanwhile, the damage of the clamp to the structure of the turbine blade 4 can be effectively reduced.
Can change the leaf basin clamping part 3212 and the back of the leaf clamping part 3222 of compact heap profile according to blade structure profile through the setting for anchor clamps do not receive the influence of blade configuration to the centre gripping of blade, have improved the general type of experimental anchor clamps, avoid carrying out secondary operation to the blade and destroy the blade, avoid creep rupture appearing in the processing position, reduce experimental result error. Meanwhile, the cost for replacing the clamp due to different blade structures can be reduced.
Although one embodiment of the present test fixture is described above, in other embodiments of the present test fixture, the present test fixture may have many more details than the embodiments described above, and at least some of these details may have many variations. At least some of these details and variations are described below in several embodiments.
With continued reference to fig. 3, in an embodiment of the test fixture, the blade basin clamping portion 3212 and the first body portion 3211 are connected by a fastening member 3215 after being positioned by the first positioning portion 3213 and the second positioning portion 3214. The blade back clamping portion 3222 and the second body portion 3221 are connected by a fastening member 3225 after being positioned by the third positioning portion 3223 and the fourth positioning portion 3224. The first positioning portion 3213 and the second positioning portion 3214, and the third positioning portion 3223 and the fourth positioning portion 3224 are respectively in central symmetry with the center of gravity of the turbine blade 4, so that a load passes through the center of gravity when loading is ensured, and no additional torsional force is generated except for a tensile load.
Specifically, in one embodiment, the first positioning portion 3213 and the third positioning portion 3223 are positioning pins provided on the first body portion 3211, and the second positioning portion 3214 and the fourth positioning portion 3224 are positioning holes provided in the blade basin clamping portion 3212 and the blade back clamping portion, respectively, and are cooperatively positioned by pin holes. As shown in the drawings, the blade bowl clamping portion 3212 and the first body portion 3211 and the blade back clamping portion 3222 and the second body portion 3221 are respectively positioned by a pair of pin hole matching structures, and then connected by a fastening member, such as a bolt. In other embodiments different from those shown in the drawings, the specific structure and number of the first to fourth positioning portions may be modified or changed from those shown in the drawings, but not limited thereto. As in one embodiment, the first and third positioning portions are positioning holes, and the second and fourth positioning portions are positioning pins. In another embodiment, the first to fourth positioning portions are in a tenon-and-mortise fit connection structure.
In one embodiment, the center of the two locating pins passes through the center of gravity of the test turbine blade 4, ensuring that the load passes through the center of gravity when loaded without creating additional torsional forces other than tensile loads.
Fig. 4 shows a schematic view from above of an embodiment of the blade body holder, wherein a receiving groove 320 is provided in the blade body holder 32, which groove conforms to the blade body of the turbine blade 4 and allows the blade body to enter.
In one embodiment of the trial clamp, the first body portion 3211 includes a blade-pot clamping block 3216 and a blade-pot clamping bar 3217, and the second body portion 3221 includes a blade-back clamping block 3226 and a blade-back clamping bar 3227.
The leaf basin clamping block 3216 is provided with a first connecting hole 50 and a first groove 51, the leaf back clamping block 3226 is provided with a second connecting hole 52 and a second groove 53, and a part of the first groove 51 butted with the second groove 53 forms a receiving groove 320.
One end of the vane clamping rod 3217 passes through the first connecting hole 50 and then is disposed in the first groove 51, the other end has a first protruding head 3218, and the vane clamping portion 3212 is detachably connected to the first protruding head 3218 of the vane clamping rod 3217. One end of the blade back clamping rod 3227 passes through the second connecting hole 52 and is disposed in the second groove 53, the other end of the blade back clamping rod 3227 is provided with a second protruding head 3228, and the blade back clamping portion 3222 is detachably connected with the second protruding head 3228 of the blade basin clamping rod 3217. As shown in the figures, in the butt joint state, the first protruding head 3218 cooperates with the bottom wall of the first groove 51, and the second protruding head 3228 cooperates with the bottom wall of the second groove 53 to limit the range of the movement of the leaf basin clamping rod 3217 and the leaf back clamping rod 3227 in the opposite direction.
In one embodiment, the leaf basin clamping unit 321 and the leaf back clamping unit 322 are held in the clamped state shown in fig. 2 by a fastener connection.
In one embodiment of the test jig, the first tabs 3218 and the second tabs 3228 are each hexahedral, and the inner circumferential profiles of the first groove portions 51 and the second groove portions 53 conform to the outer circumferential profiles of the first tabs 3218 and the second tabs 3228, respectively.
In an embodiment of the test fixture, the blade root clamping piece 31 is a wheel disc simulation piece which is provided with a mortise consistent with a mortise connecting structure in the wheel disc, so that the blade root clamping piece 31 is connected with the blade root of the turbine blade 4 in a tenon-mortise matching mode, and the reliability of the test is improved by arranging the wheel disc simulation piece to simulate the real clamping state between the turbine blade 4 and the wheel disc.
Referring to fig. 5, which shows a schematic sectional view of the blade body holder taken at another angle, in one embodiment of the test fixture, as shown in fig. 5, a water cooling channel 201 is formed in the blade body holder 32 for introducing a liquid such as water to cool the blade during or after the test.
With continued reference to fig. 1, in one embodiment of the test fixture, the first connector 1 is connected to the blade body clamp 32 via the connection block 6, and the second connector 2 is connected to the blade root clamp 31. Specifically, the first joint 1 is connected to the attachment block 6 by a first connecting pin 71, and the attachment block 6 is connected to the blade holding member 32 by a second connecting pin 72. The second connection head 2 is connected to the blade root holder 31 by means of a third connection pin 73.
The test fixture in one or more of the embodiments is also applied to a turbine blade high-temperature creep test system, the turbine blade high-temperature creep test system comprises a tensile test bed, and the test fixture is connected with the tensile test bed through a first connector 1 and a second connector 2 at two ends respectively.
The utility model discloses an advance effect includes following one or combination:
can change the leaf basin clamping part and the leaf back clamping part of compact heap profile according to blade structure profile through the setting for anchor clamps do not receive the influence of blade configuration to the centre gripping of blade, have improved the general type of test fixture, avoid carrying out secondary operation to the blade and destroy the blade, avoid creep rupture appearing in the processing position, reduce the test result error. Meanwhile, the cost for replacing the clamp due to different blade structures can be reduced.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (10)
1. The utility model provides a test fixture for centre gripping turbine blade, include first connector, second connector and connect in first connector with centre gripping subassembly between the second connector, the centre gripping subassembly is including the blade root holder that is used for centre gripping blade root and the blade body holder that is used for centre gripping blade body, its characterized in that, the blade body holder includes:
the blade basin clamping unit comprises a first body part and a blade basin clamping part, and the blade basin clamping part is provided with a blade basin clamping surface which is conformal with a blade basin of the turbine blade to be clamped; and the number of the first and second groups,
the blade back clamping unit comprises a second body part and a blade back clamping part, and the blade back clamping part is provided with a blade back clamping surface which is conformal with the blade back of the turbine blade to be clamped;
the first body part and the blade basin clamping part and the second body part and the blade back clamping part are respectively detachably connected.
2. The test fixture of claim 1,
the blade basin clamping part is connected with the first body part through a fastener after being matched and positioned with the second positioning part through the first positioning part;
the blade back clamping part is connected with the second body part through a fastener after being matched and positioned by a third positioning part and a fourth positioning part;
the first positioning portion and the second positioning portion, and the third positioning portion and the fourth positioning portion are respectively in central symmetry with the gravity center of the turbine blade.
3. The test fixture of claim 2,
the first positioning portion and the third positioning portion are positioning pins respectively arranged on the first body portion and the second body portion, and the second positioning portion and the fourth positioning portion are positioning holes respectively arranged in the blade basin clamping portion and the blade back clamping portion.
4. The test fixture of claim 1,
the blade body clamping piece is provided with a containing groove which is conformal with the blade body and allows the blade body to enter.
5. The test fixture of claim 4,
the first body part comprises a blade basin clamping block and a blade basin clamping rod, and the second body part comprises a blade back clamping block and a blade back clamping rod;
a first connecting hole and a first groove part are formed in the leaf basin clamping block, a second connecting hole and a second groove part are formed in the leaf back clamping block, and a part of the first groove part and the second groove part after being in butt joint is used as the accommodating groove;
one end of the leaf basin clamping rod penetrates through the first connecting hole and then is arranged in the first groove part, the other end of the leaf basin clamping rod is provided with a first raised head, and the first raised head is detachably connected with the leaf basin clamping part; one end of the blade back clamping rod penetrates through the second connecting hole and then is arranged in the second groove part, the other end of the blade back clamping rod is provided with a second raised head, the second raised head is detachably connected with the blade back clamping part, and the first raised head and the bottom wall of the first groove part and the second raised head and the bottom wall of the second groove part are matched together to limit the range of opposite movement of the blade basin clamping rod and the blade back clamping rod.
6. The test fixture of claim 5,
the first raised head and the second raised head are respectively hexahedral, and the inner peripheral profiles of the first groove part and the second groove part are respectively conformal with the first raised head and the second raised head.
7. The test fixture of claim 1,
the blade root clamping piece is a wheel disc simulation piece and is provided with a mortise which is consistent with the structure in the wheel disc, so that the blade root clamping piece is connected with the blade root through the mortise and tenon in a matched mode.
8. The test fixture of claim 1,
a water cooling channel is formed in the blade body clamping piece.
9. The test fixture of claim 1,
the first connector passes through the connecting block with the blade body holder is connected, the second connector with the blade root holder is connected.
10. A turbine blade high temperature creep test system comprising a tensile test stand, further comprising a test fixture according to any one of claims 1 to 9;
the two ends of the test fixture are connected with the tensile test bed through the first connector and the second connector respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022096896.1U CN213239773U (en) | 2020-09-22 | 2020-09-22 | Turbine blade high-temperature creep test system and test fixture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022096896.1U CN213239773U (en) | 2020-09-22 | 2020-09-22 | Turbine blade high-temperature creep test system and test fixture thereof |
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| CN213239773U true CN213239773U (en) | 2021-05-18 |
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| CN202022096896.1U Active CN213239773U (en) | 2020-09-22 | 2020-09-22 | Turbine blade high-temperature creep test system and test fixture thereof |
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