Blade centrifugal loading device and centrifugal test equipment with same

Abstract

The invention relates to the technical field of turbine rotor blade design, and discloses a blade centrifugal loading device and centrifugal test equipment with the blade centrifugal loading device.According to the blade centrifugal loading device, a loading piece is arranged between the bottom of a mortise and the bottom of a tenon tooth, and the loading piece is suitable for acting in the loading direction relative to the mortise; the first working surfaces of the tenon teeth abut against the second working surfaces of the mortises; the at least two connecting pieces are arranged between the loading piece and the bottom of the tenon tooth, each connecting piece comprises a positioning part and a movable cylinder, the positioning parts are connected with the loading piece, the outer walls of the positioning parts are rotatably sleeved with the movable cylinders, and radial clearance fit is formed between the inner walls of the movable cylinders and the outer walls of the positioning parts. The multiple connecting pieces are driven to make contact with the bottoms of the tenon teeth, when the multiple connecting pieces make contact with the bottoms of the tenon teeth with the uneven bottom faces, the movable barrels automatically adjust the contact positions of the movable barrels and the bottoms of the tenon teeth, the loading direction of loading force is guaranteed, it is guaranteed that the loading force is consistent with the actual working state of the blade, and the test accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine rotor blade design, and in particular to a blade centrifugal loading device and centrifugal testing equipment having the same. Background Art

[0002] In the design and testing of turbine rotor blades, in order to simulate the centrifugal load action and effect of the blades in working condition, it is necessary to load the tenon working surface of the blades in the radial direction.

[0003] In the prior art, the bottom of the upper blade is used to make the tenon cooperate with the tenon working surface of the loading device. Due to the deviation in the processing and manufacturing of the blade and the structural deviation of the loading device, the bottom of the blade and the force transmission structure have a poor matching effect, which affects the loading direction of the tenon working surface of the blade, making it impossible to make the loading direction of the blade and the centrifugal direction of the blade coincide, affecting the authenticity and accuracy of the design evaluation and test results. Summary of the Invention

[0004] In view of this, the present invention provides a blade centrifugal loading device and a centrifugal testing equipment having the same, so as to solve the problem that the bottom of the blade and the force transmission structure have poor coordination effect, and the loading direction of the blade and the centrifugal direction of the blade cannot coincide, thereby affecting the accuracy of the test.

[0005] In a first aspect, an embodiment of the present invention provides a blade centrifugal loading device, adapted to load a blade along a preset loading direction, comprising:

[0006] A base having a surface provided with a tenon groove, wherein at least part of the tenon teeth of the blade are arranged in the tenon groove;

[0007] a loading member disposed between the bottom of the mortise groove and the bottom of the tenon tooth, the loading member being adapted to move relative to the mortise groove along the loading direction to drive the first working surface of the tenon tooth and the second working surface of the mortise groove to abut against each other;

[0008] At least two connecting parts are arranged between the loading part and the bottom of the tenon, and the connecting part includes a positioning part and a movable cylinder. The positioning part is connected to the loading part, and the movable cylinder is rotatably sleeved on the outer wall of the positioning part, and a radial clearance is formed between the inner wall of the movable cylinder and the outer wall of the positioning part.

[0009] Beneficial effect: When the loader moves along the loading direction, the loader drives multiple connecting parts to contact the bottom of the tenon. When the multiple connecting parts contact the bottom of the tenon with an uneven bottom surface, the movable cylinder and the positioning part are clearance-matched, so that the movable cylinder can rotate around the positioning part, and the movable cylinder can produce a slight offset relative to the positioning part. The movable cylinder automatically adjusts the contact position with the bottom of the tenon until the multiple movable cylinders are in contact with the bottom of the tenon, ensuring the loading direction of the loading force, so that the first working surface of the tenon and the second working surface of the tenon groove of the blade fit together under the action of the loading force, ensuring consistency with the actual working state of the blade, and improving the test accuracy.

[0010] Optionally, the outer wall of the movable cylinder is provided with a contact portion, and the contact portion is suitable for forming a line-surface contact fit with the bottom of the tenon.

[0011] Beneficial effect: The outer wall of the movable cylinder forms a line contact fit with the bottom end face of the tenon through the contact portion. The line-surface fit forces the loading force to be transmitted radially, so that the first working surface of the tenon and the second working surface of the tenon groove fit together, and a gap is retained on the non-working surface, simulating the working surface contact state when the blade is actually loaded, thereby improving the test accuracy.

[0012] Optionally, the plurality of positioning portions are arranged at equal intervals along the radial extension direction of the loader, and the central axes of the positioning portions are coplanarly arranged on the same horizontal reference plane, which is perpendicular to the loading direction of the loader.

[0013] Beneficial effect: Multiple positioning parts are arranged at equal intervals and set with coplanar axes, which facilitates the formation of line-surface contact between each movable cylinder and the bottom of the tenon, and ensures that each positioning part is subjected to uniform force, so that each positioning part can share the load more evenly and reduce fatigue damage to individual positioning parts.

[0014] Optionally, the loading component includes:

[0015] The bearing portion is in limited sliding engagement with the inner wall of the mortise and tenon groove and is connected to the connecting member;

[0016] The driving part is arranged on a side of the bearing part away from the tenon teeth. The driving part and the bearing part are in contact with each other to drive the bearing part to move toward the tenon teeth.

[0017] Beneficial effects: The load-bearing part is used to support the connecting part, and the driving part can provide loading force to the tenon, and the load-bearing part and the inner wall of the tenon are limited and slidably matched, so that the loading part can only move in the loading direction, avoiding displacement of the loading part in other directions relative to the tenon, thereby ensuring the accuracy of the loading direction.

[0018] Optionally, a contact structure is provided between the driving portion and the bearing portion, and the contact structure includes:

[0019] a protrusion, provided at an end of the driving portion, and having a spherical surface;

[0020] A first recessed portion is provided at the bottom of the bearing portion, wherein an inner wall of the first recessed portion is provided as a spherical surface;

[0021] The spherical surface of the protruding portion and the spherical surface of the first recessed portion are rotatably adapted to each other.

[0022] Beneficial effect: The first recessed portion and the protruding portion are adapted to enable the loading force provided by the driving portion to be transmitted to the bearing portion in the radial direction, and both the first recessed portion and the protruding portion have a spherical surface structure, which facilitates the driving portion to rotate relative to the bearing portion to provide loading force to the bearing portion.

[0023] Optionally, a second recessed portion is provided at the bottom of the inner wall of the first recessed portion, and the inner wall of the second recessed portion is configured as a concave spherical surface.

[0024] Beneficial effect: Arranging the second recessed portion on the inner wall of the first recessed portion can reduce the matching sensitivity of the first recessed portion and the protruding portion. On the basis of the effective matching of the first recessed portion and the protruding portion, the matching surface area is reduced and the matching accuracy is improved.

[0025] Optionally, the bearing portion includes:

[0026] The first carrier has side walls that are in limited sliding engagement with the inner wall of the tenon groove;

[0027] A plurality of second carriers are arranged on the end surface of the first carrier close to the bottom of the tenon, and at least one positioning portion is fixed on each of the second carriers.

[0028] Beneficial effect: The first carrier and the mortise and tenon are used to limit the movement direction of the carrier, and multiple second carriers are used to support different positioning parts, so that multiple positioning parts are arranged with spacing, which facilitates the movable cylinder on the positioning part to be able to move relative to the positioning part, thereby ensuring the loading direction of the loading force.

[0029] Optionally, the driving portion is configured as a force transmission bolt, the force transmission bolt is passed through the base and extends into the mortise and tenon groove, and the force transmission bolt and the base are rotationally matched.

[0030] Beneficial effect: The force transmission bolt and the base are rotated together as the loading structure, which can provide the loading force more accurately.

[0031] Optionally, a positioning roller is provided on the surface of the base, and the positioning roller is suitable for limiting the tenon so that when the loader drives the tenon to move, the first working surface of the tenon and the second working surface of the tenon groove are against each other.

[0032] Beneficial effect: When the loader drives the tenon to move, the positioning roller can achieve precise positioning and constraint of the tenon through the linear contact between the positioning roller and the tenon side surface.

[0033] In a second aspect, an embodiment of the present invention provides a centrifugal testing device comprising any one of the blade centrifugal loading devices described above.

[0034] Beneficial effects: The centrifugal testing equipment has the above-mentioned blade centrifugal loading device. When performing centrifugal testing on the blade, it can ensure the direction of the loading force on the blade, so that the first working surface of the tenon and the second working surface of the tenon groove of the blade fit together under the action of the loading force, ensuring consistency with the actual working state of the blade and improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 Schematic diagram of a state where the first working surface of the tenon and the second working surface of the tenon groove are not fitted together according to an embodiment of the present invention;

[0037] Figure 2 For the embodiment of the present invention Figure 1 Side view of

[0038] Figure 3 A schematic diagram of the first working surface of the tenon and the second working surface of the tenon groove in a state of being fitted together according to an embodiment of the present invention;

[0039] Figure 4 For the embodiment of the present invention Figure 3 Side view of

[0040] Figure 5 Schematic diagram of the connection relationship between the bearing portion and the driving portion according to an embodiment of the present invention;

[0041] Figure 6 Schematic diagram of the connection between the positioning portion and the movable cylinder according to an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Blade; 101. Tenon; 102. Leaf;

[0044] 2. Base; 3. Mortise and tenon;

[0045] 4. Loading member; 401. Carrying part; 4011. First carrier; 4012. Second carrier; 402. Driving part;

[0046] 5. Connecting piece; 501. Positioning portion; 502. Movable cylinder; 503. Movable gap;

[0047] 6. Protruding portion; 7. First recessed portion; 8. Second recessed portion; 9. Positioning roller. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0049] Please refer to Figures 1-6 In a first aspect, an embodiment of the present invention provides a blade centrifugal loading device, which is suitable for loading a blade 1 along a preset loading direction, and includes a base 2, a loading member 4 and at least two connecting members 5.

[0050] Among them, a tenon groove 3 is provided on the surface of the base 2, and at least part of the tenon 101 of the blade 1 is provided in the tenon groove 3; the loading member 4 is provided between the bottom of the tenon groove 3 and the bottom of the tenon 101, and the loading member 4 is suitable for moving relative to the tenon groove 3 along the loading direction to drive the first working surface of the tenon 101 and the second working surface of the tenon groove 3 to offset each other.

[0051] In this embodiment, the blade 1 includes a tenon 101 and a leaf portion 102 connected to the tenon 101. The bottom of the tenon 101 is the bottom of the blade 1. A tenon groove 3 is provided on the surface of the base 2. The structure of the tenon groove 3 is adapted to the structure of the tenon 101 of the blade 1. A plurality of second working surfaces are formed on the inner wall of the tenon groove 3. A plurality of first working surfaces are provided on the tenon 101. The loader 4 is provided at the bottom of the tenon groove 3.

[0052] When loading the blade 1, first place the tenon 101 part of the blade 1 into the tenon 3. At this time, the second working surface in the tenon 3 and the first working surface on the tenon 101 are aligned, and there is a gap between the first working surface and the second working surface. Then drive the loader 4 to move toward the bottom direction close to the tenon 101. After the loader 4 contacts the bottom of the tenon 101 through the connecting member 5, the loader 4 continues to move, pushing the tenon 101 to move, so that the first working surface on the tenon 101 and the second working surface on the inner wall of the tenon 3 fit together, thereby simulating the matching form of the tenon 101 and the tenon 3 in the working state.

[0053] Of course, based on the fact that the loader 4 can drive the tenon 101 to move, the loader 4 can also move away from the bottom of the tenon 101, so that the loader 4 releases the loading force on the tenon 101, making it easier to replace the blade 1.

[0054] It can be understood that due to the manufacturing deviation of the blade 1 and the structural deviation of the loading device, specifically the surface of the bottom of the tenon 101 of the blade 1 is non-planar, making it difficult for the conventional loading structure to fully contact and cooperate with the bottom of the tenon 101, thereby affecting the uniform transmission of the loading force and the loading direction of the loading force.

[0055] Therefore, the blade centrifugal loading device also includes at least two connecting parts 5, which are arranged between the loading part 4 and the bottom of the tenon 101. The connecting part 5 includes a positioning part 501 and a movable cylinder 502. The positioning part 501 and the loading part 4 are connected. The movable cylinder 502 is rotatably mounted on the outer wall of the positioning part 501, and a radial clearance is formed between the inner wall of the movable cylinder 502 and the outer wall of the positioning part 501.

[0056] Among them, reference Figure 6 The movable cylinder 502 is configured as a cylindrical structure with a central opening, the positioning portion 501 is passed through the central opening and a small movable gap 503 is provided between the positioning portion 501 and the inner wall of the movable cylinder 502 so that the positioning portion 501 and the movable cylinder 502 form a clearance fit.

[0057] In this way, when the loader 4 moves along the loading direction, the loader 4 drives the multiple connecting members 5 to contact the bottom of the tenon 101. When the multiple connecting members 5 contact the bottom of the tenon 101 with an uneven bottom surface, the movable cylinder 502 and the positioning part 501 are clearance-matched, so that the movable cylinder 502 can rotate around the positioning part 501, and the movable cylinder 502 can produce a slight offset relative to the positioning part 501. The movable cylinder 502 automatically adjusts the contact position with the bottom of the tenon 101 until the multiple movable cylinders 502 contact and cooperate with the bottom of the tenon 101, ensuring the loading direction of the loading force, so that the first working surface of the tenon 101 of the blade 1 and the second working surface of the tenon groove 3 are fitted under the action of the loading force, ensuring consistency with the actual working state of the blade 1, and improving the test accuracy.

[0058] During the centrifugal loading test, the centrifugal force on the turbine rotor blades reached over tens of thousands of Newtons, and the centrifugal force applied by the blade loading device gradually increased to the required value. During this period, the movable cylinder 502 in the multiple connectors 5 rotated freely along the positioning portion 501 and automatically adjusted its contact position with the bottom of the tenon 101, thereby achieving a self-adaptive fit between the cylindrical surface of the movable cylinder 502 and the bottom plane of the tenon 101. Conversely, when the centrifugal loading was reduced, the cylindrical surface of the movable cylinder 502 and the bottom plane of the tenon 101 were also able to self-adaptively fit.

[0059] Preferably, refer to Figure 1 、 Figure 3 , the number of the connecting members 5 is set to three. In actual use, one of the connecting members 5 can be used as the main positioning and loading structure, and the other two connecting members 5 are used as auxiliary positioning and loading structures. The three are adjusted together to achieve higher accuracy.

[0060] In a specific embodiment, the positioning portion 501 is a connecting pin, a round rod or other cylindrical structure fixed on the loading component 4.

[0061] Optionally, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The outer wall of the movable cylinder 502 is provided with a contact portion, which is suitable for forming a line-surface contact fit with the bottom of the tenon 101.

[0062] In this embodiment, the outer wall of the movable cylinder 502 is a regular smooth arc surface, the contact part can be the arc outer wall surface of the movable cylinder 502, or a curved structure with a smooth outer surface can be fixed on the outer wall of the movable cylinder 502 so that the outer wall surface of the curved structure forms a contact part, thereby forming a line-surface contact fit between the contact part and the bottom of the tenon 101.

[0063] In this way, the outer wall of the movable cylinder 502 forms a line contact fit with the bottom end face of the tenon 101 through the contact portion. The line-surface fit forces the loading force provided by the loader 4 to be transmitted radially, so that the first working surface of the tenon 101 and the second working surface of the tenon groove 3 fit together, and a gap is retained on the non-working surface, simulating the working surface contact state of the blade 1 when it is actually loaded, thereby improving the test accuracy.

[0064] Optionally, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , multiple positioning parts 501 are arranged at equal intervals along the radial extension direction of the loader 4, and the central axes of each positioning part 501 are coplanarly arranged on the same horizontal reference plane, and the horizontal reference plane is perpendicular to the loading direction of the loader 4.

[0065] In this embodiment, multiple positioning portions 501 are provided at the same height of the loader 4, and are evenly spaced. This facilitates linear contact between each movable cylinder 502 and the bottom of the tenon 101, ensuring uniform force on each positioning portion 501. This allows each positioning portion 501 to share the load more evenly, reducing fatigue damage to individual positioning portions 501.

[0066] Optionally, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The loader 4 includes a bearing part 401 and a driving part 402, wherein the bearing part 401 is slidingly matched with the inner wall of the tenon groove 3 and is connected to the connecting part 5; the driving part 402 is arranged on the side of the bearing part 401 away from the tenon 101, and the driving part 402 is in contact with the bearing part 401 to drive the bearing part 401 to move toward the direction close to the tenon 101.

[0067] In this embodiment, the inner wall of the bottom area of ​​the mortise 3 is set to a regular structure, such as a rectangular structure, at least part of the bearing portion 401 is set at the bottom of the mortise 3, and at least part of the outer wall of the bearing portion 401 is set to a rectangular structure, so that the outer wall of the bearing portion 401 and the inner wall of the mortise 3 fit snugly, and the bearing portion 401 can slide relative to the mortise 3 and move in a direction close to the tenon 101 under the limiting action of the mortise 3.

[0068] In this way, the bearing part 401 is used to support the connecting part 5, and the driving part 402 can provide a loading force to the tenon 101, and the bearing part 401 and the inner wall of the tenon 101 are limited and slidably matched, so that the loading part 4 can only move in the loading direction, avoiding displacement of the loading part 4 in other directions relative to the tenon 3, thereby ensuring the accuracy of the loading direction.

[0069] Optionally, refer to Figure 5 A contact structure is provided between the driving portion 402 and the bearing portion 401, and the contact structure includes a protrusion 6 and a first recessed portion 7, wherein the protrusion 6 is provided at the end of the driving portion 402 and has a spherical surface; the first recessed portion 7 is provided at the bottom of the bearing portion 401, and the inner wall of the first recessed portion 7 is provided as a spherical surface; wherein the spherical surface of the protrusion 6 and the spherical surface of the first recessed portion 7 are rotatably adapted.

[0070] In this embodiment, the spherical surface of the protrusion 6 extends into the first recess 7 and fits with the spherical surface of the inner wall of the first recess 7 , so that the protrusion 6 can rotate relative to the first recess 7 .

[0071] In this way, the first recessed portion 7 and the protruding portion 6 are adapted to each other, so that the loading force provided by the driving portion 402 can be transmitted to the bearing portion 401 in the radial direction, and both the first recessed portion 7 and the protruding portion 6 have a spherical surface structure, which facilitates the driving portion 402 to rotate relative to the bearing portion 401 to provide loading force to the bearing portion 401.

[0072] In an alternative embodiment, the protrusion 6 can be a spherical structure fixed to the end of the driving portion 402 close to the bearing portion 401, and the spherical structure has a spherical surface. Alternatively, the end of the driving portion 402 close to the bearing portion 401 forms a spherical surface, and the spherical surface is the protrusion 6.

[0073] Optionally, refer to Figure 5 A second recessed portion 8 is provided at the bottom of the inner wall of the first recessed portion 7 , and the inner wall of the second recessed portion 8 is provided as a concave spherical surface.

[0074] In this embodiment, while the protrusion 6 and the first recess 7 cooperate to achieve radial transmission of the loading force, a second recess 8 is provided on the inner wall of the first recess 7. The first recess 7 is a groove with its opening facing the drive portion 402, and the second recess 8 is another groove disposed at the bottom of the groove. This effectively reduces the surface area of ​​the mating between the protrusion 6 and the first recess 7, improving the accuracy of the mating and effectively reducing the sensitivity of the mating between the first recess 7 and the protrusion 6.

[0075] Optionally, refer to Figure 5 The bearing portion 401 includes a first bearing body 4011 and a plurality of second bearing bodies 4012, wherein the side wall of the first bearing body 4011 and the inner wall of the tenon groove 3 are limitedly slidably matched; the plurality of second bearing bodies 4012 are arranged on the end face of the bottom of the first bearing body 4011 close to the tenon tooth 101, and each second bearing body 4012 is fixed with at least one positioning portion 501.

[0076] In this embodiment, the outer wall of the first carrier 4011 and the inner wall of the bottom of the tenon 3 are adapted to each other, so that when the loader 4 moves along the tenon 3, the movement direction of the loader 4 is limited by the limiting sliding cooperation between the first carrier 4011 and the inner wall of the tenon 3. The second carrier 4012 is a protrusion protruding from the surface of the first carrier 4011, and a positioning portion 501 is fixed on the protrusion. A movable cylinder 502 is sleeved on the positioning portion 501, and the movable cylinder 502 protrudes from the end face of the second carrier 4012 in the direction close to the bottom of the tenon 101 to prevent the second carrier 4012 from affecting the normal contact and cooperation between the movable cylinder 502 and the bottom of the tenon 101.

[0077] Multiple second carriers 4012 are preferably arranged at equal intervals along the radial extension direction of the first carrier 4011, and each second carrier 4012 is preferably provided with a positioning portion 501. The arrangement position of the second carrier 4012 is utilized to facilitate the limitation of arranging multiple positioning portions 501 at equal intervals along the radial extension direction of the first carrier 4011, so as to facilitate the formation of line-surface contact between the bottom of each movable cylinder 502 and the tenon 101, thereby ensuring that each positioning portion 501 is subjected to uniform force and reducing fatigue damage to individual positioning portions 501.

[0078] By adopting the above-mentioned setting method, the first carrier 4011 and the tenon 3 are used to cooperate to limit the movement direction of the carrier part 401, and multiple second carriers 4012 are used to support different positioning parts 501, so that multiple positioning parts 501 are set at intervals, which facilitates the movable cylinder 502 on the positioning part 501 to be able to move relative to the positioning part 501, thereby ensuring the loading direction of the loading force.

[0079] Optionally, refer to Figure 5 The driving part 402 is configured as a force transmission bolt, which is passed through the base 2 and extends into the tenon groove 3, and the force transmission bolt and the base 2 are rotated together.

[0080] In this embodiment, the force transmission bolt is a precision force transmission bolt. A threaded hole is provided at the bottom of the base 2. The force transmission bolt is passed through the threaded hole and is rotatably connected to the base 2 through the threaded hole. A protrusion 6 is provided at the end of the force transmission bolt. The protrusion 6 and the first recessed portion 7 are used to cooperate with each other to realize that the transmission bolt provides a loading force to the loader 4. The force transmission bolt and the base 2 are used in rotation as a loading structure, which can provide a more precise loading force.

[0081] In a specific embodiment, the driving portion 402 includes at least two force transmission bolts.

[0082] Preferably, two force transmission bolts are provided, and the two force transmission bolts are arranged symmetrically with the central axis of the first carrier 4011 as a mirror plane, so as to provide a more accurate loading force in the loading direction.

[0083] Optionally, refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 A positioning roller 9 is provided on the surface of the base 2, and the positioning roller 9 is suitable for limiting the tenon 101 so that when the loader 4 drives the tenon 101 to move, the first working surface of the tenon 101 and the second working surface of the tenon groove 3 are against each other.

[0084] In this embodiment, the positioning roller 9 can rotate relative to the base 2. In this way, when the loader 4 drives the tenon 101 to move, the positioning roller 9 and the side surface of the tenon 101 are in line contact, thereby achieving precise positioning and constraint of the tenon 101.

[0085] As can be understood, the tenon 101 is provided on the tenon of the blade 1 and is a protrusion protruding from the tenon surface. When the loader 4 drives the tenon 101 to move, the positioning roller 9 can restrain the side end surface of the tenon, preventing the tenon from shifting on the side end surface during upward movement. This indirectly restricts the movement direction of the tenon 101 on the tenon, achieving precise positioning and restraint of the tenon 101.

[0086] In a specific embodiment, a support seat is fixed on the surface of the base 2 , and the positioning roller 9 is rotatably disposed on the support seat to achieve precise positioning and constraint of the tenon 101 .

[0087] In another specific embodiment, the positioning roller 9 is passed through the base 2 and is rotatably connected relative to the base 2 , and at least a portion of the positioning roller 9 is located in the tenon groove 3 , which can also achieve precise positioning and constraint of the tenon teeth 101 .

[0088] In a second aspect, an embodiment of the present invention provides a centrifugal testing device, comprising the above-mentioned blade centrifugal loading device.

[0089] In this embodiment, the centrifugal testing equipment has the above-mentioned blade centrifugal loading device. When performing a centrifugal test on the blade 1, it can ensure the direction of the loading force on the blade 1, so that the first working surface of the tenon 101 of the blade 1 and the second working surface of the tenon groove 3 are fit together under the action of the loading force, ensuring consistency with the actual working state of the blade 1 and improving the test accuracy.

[0090] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A blade centrifugal loading device, characterized in that: Suitable for loading a blade (1) along a preset loading direction, comprising: A base (2) is provided with a tenon groove (3) on its surface, and at least part of the tenon teeth (101) of the blade (1) is provided in the tenon groove (3); A loading member (4) is disposed between the bottom of the mortise (3) and the bottom of the tenon (101), and the loading member (4) is adapted to move relative to the mortise (3) along the loading direction to drive the first working surface of the tenon (101) and the second working surface of the mortise (3) to abut against each other; At least two connecting members (5) are arranged between the loading member (4) and the bottom of the tenon (101), and the connecting member (5) includes a positioning portion (501) and a movable cylinder (502). The positioning portion (501) and the loading member (4) are connected, and the movable cylinder (502) is rotatably sleeved on the outer wall of the positioning portion (501), and a radial clearance is formed between the inner wall of the movable cylinder (502) and the outer wall of the positioning portion (501).

2. The blade centrifugal loading device according to claim 1, characterized in that: The outer wall of the movable cylinder (502) is provided with a contact portion, and the contact portion is suitable for forming a line-surface contact fit with the bottom of the tenon (101).

3. The blade centrifugal loading device according to claim 1, characterized in that: The plurality of positioning portions (501) are arranged at equal intervals along the radial extension direction of the loading member (4), and the central axes of the positioning portions (501) are coplanarly arranged on the same horizontal reference plane, and the horizontal reference plane is arranged perpendicular to the loading direction of the loading member (4).

4. The blade centrifugal loading device according to claim 1, characterized in that: The loading component (4) comprises: The bearing portion (401) is in limited sliding engagement with the inner wall of the mortise and tenon groove (3) and is connected to the connecting member (5); The driving portion (402) is arranged on a side of the bearing portion (401) away from the tenon (101), and the driving portion (402) and the bearing portion (401) are in contact with each other to drive the bearing portion (401) to move toward the tenon (101).

5. The blade centrifugal loading device according to claim 4, characterized in that: A contact structure is provided between the driving portion (402) and the bearing portion (401), and the contact structure comprises: a protrusion (6) provided at the end of the driving portion (402) and having a spherical surface; A first recessed portion (7) is provided at the bottom of the bearing portion (401), and an inner wall of the first recessed portion (7) is provided as a spherical surface; The spherical surface of the protruding portion (6) and the spherical surface of the first recessed portion (7) are rotatably adapted.

6. The blade centrifugal loading device according to claim 5, characterized in that: A second recessed portion (8) is provided at the bottom of the inner wall of the first recessed portion (7), and the inner wall of the second recessed portion (8) is provided as a concave spherical surface.

7. The blade centrifugal loading device according to claim 4, characterized in that: The bearing portion (401) comprises: The first carrier (4011) has a side wall that is in limited sliding engagement with the inner wall of the tongue and groove (3); A plurality of second carriers (4012) are arranged on the end surface of the first carrier (4011) close to the bottom of the tenon (101), and at least one positioning portion (501) is fixed on each of the second carriers (4012).

8. The blade centrifugal loading device according to claim 4, characterized in that: The driving portion (402) is configured as a force transmission bolt, the force transmission bolt is passed through the base (2) and extends into the mortise and tenon groove (3), and the force transmission bolt and the base (2) are rotationally matched.

9. The blade centrifugal loading device according to any one of claims 1 to 8, characterized in that: A positioning roller (9) is provided on the surface of the base (2), and the positioning roller (9) is suitable for limiting the tenon (101) so that when the loader (4) drives the tenon (101) to move, the first working surface of the tenon (101) and the second working surface of the tenon groove (3) are against each other.

10. A centrifugal test device, characterized in that: The centrifugal loading device for blades comprises the device described in any one of claims 1 to 9.

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