CN215262848U - Composite material blade static strength test device - Google Patents
Composite material blade static strength test device Download PDFInfo
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- CN215262848U CN215262848U CN202022710449.0U CN202022710449U CN215262848U CN 215262848 U CN215262848 U CN 215262848U CN 202022710449 U CN202022710449 U CN 202022710449U CN 215262848 U CN215262848 U CN 215262848U
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 230000003068 static effect Effects 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims description 9
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 3
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- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model discloses a quiet intensity test device of combined material blade, including the square chest, fix mounting flange, support frame on the square chest, fix root mounting on the support frame, a plurality ofly cut off into with the blade body the same number of cross-sections have with the profile modeling anchor clamps of the die cavity that the cross-sectional shape of tight blade department matches completely that presss from both sides with fix eyebolt on the bottom surface of each profile modeling anchor clamps, can exert the loading frock of force at every profile modeling anchor clamps lower extreme. The static strength test device can achieve the purpose of static strength test only by loading one force, does not need to adjust the loading force, and has simple and convenient operation; the device has the advantages of simple structure, low cost, high test accuracy and high test efficiency.
Description
Technical Field
The utility model relates to a combined material blade static strength test device.
Background
In order to ensure that the produced blades meet the required strength and rigidity, a static strength test needs to be carried out on each produced blade.
Usually, the early-stage static strength analysis is to artificially divide the blade body of the blade into a plurality of sections according to a certain distance, and the force dispersed on the upper surface of the blade is fitted on the sections through the fitting of various types of software, so as to meet the requirement of the stress condition of the actual blade. In the existing static strength test, the blade body of the blade is generally artificially divided into 6 sections in the early static strength analysis, as shown in fig. 1, it is further analyzed that each section on the 6 sections is subjected to two forces F in the counter airflow direction and the rotation directionCounter current flowAnd FRotateThe position and direction of which are shown in fig. 2, each section is subjected to two forces F against the direction of the air flow and the direction of rotationCounter current flowAnd FRotateIs equivalent to FResultant forceAs shown in fig. 3. Therefore, in the actual loading test, 12 forces are applied to 6 sections simultaneously to load the blade body of the blade, and the static strength test device comprises 12 sets of loading mechanisms, so that the structure is complex, the equipment cost is high, and the installation and disassembly time is long; the equipment debugging process is loaded down with trivial details, and after accomplishing according to theoretical data loading to 1 st cross-section, when again carrying out the loading to 2 nd cross-section, can exert an influence to the loading data that the 1 st cross-section has been adjusted, after adjusting the loading data of 1 st, 2 nd cross-section, when again carrying out the loading to 3 rd cross-section, again can exert an influence … … to 1 st, 2 nd cross-section, therefore the adjustment process is very loaded down with trivial details. Therefore, the key link of whether the static strength test can be smoothly, simply and efficiently finished is to simplify the number of the loading forces, the aim of the static strength test can be achieved by researching one force even if the force is less loaded, and the structure is simpleThe test device is high in test accuracy, low in cost and high in test efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem that exists among the prior art, provide a simple structure, it is with low costs, the experimental degree of accuracy is high, the quiet intensity test device of combined material blade that efficiency of the test is high, this test device only load a power just can reach the experimental purpose of quiet intensity, need not to adjust loaded power, easy operation is convenient.
In order to achieve the above object, the technical solution of the present invention is: a composite material blade static strength test device comprises a square box, a fixed flange, a support frame, a root fixing piece, a plurality of profiling fixtures and lifting ring screws, wherein the number of the profiling fixtures and the lifting ring screws is the same as that of the sections of a blade body divided according to theoretical analysis;
the fixed flange is in a shape of a Chinese character 'ji', the periphery of the fixed flange is fixedly arranged at the upper end part of the square box mounting surface, and the center of the fixed flange is provided with a threaded mounting hole at the end part of a blade root;
the supporting frame is fixed at the lower end of the blade root at the joint of the blade root and the blade body, the root fixing piece is fixed at the upper end of the supporting frame, a blade root clamping fixing hole is formed in the root fixing piece, and the threaded mounting hole and the clamping fixing hole are concentric with the central shaft;
each profiling fixture comprises an upper fixture and a lower fixture which are fixed together, an integral cavity formed by an upper fixture cavity and a lower fixture cavity is completely matched with the shape of the section of a clamped blade, and the parting surfaces of the upper fixture cavity and the lower fixture cavity are the connecting line of the maximum contour lines of the front edge and the rear edge of the blade body; the right end of the bottom surface of each lower clamp is cut off, and two forces F which are analyzed according to theory and are applied to the clamped section of the lower clamp in the reverse air flow and the rotation directionCounter current flowAnd FRotateEquivalent FResultant forceThe included angle between the right horizontal plane and the left inclined plane of the bottom surface is FResultant forceThe included angle value between the right end horizontal plane and the vertical line is provided with a threaded hole, the central axis of which is vertical to the right end horizontal plane and is vertically intersected with the axis of the blade; each lifting ring screw is fixed at the right end of the bottom surface of each lower clampA threaded hole;
the loading tool comprises a plurality of vertical connecting plates with threaded holes at the upper and lower parts, a plurality of transverse connecting plates with through holes at the left and right ends and in the middle, a plurality of groups of bolts and nuts; the upper and lower parts of the two vertical connecting plates are fixed together at intervals by bolts and nuts to form a hinged part with two hinged shafts; the middle of the transverse connecting plate at the lower end is connected with a mechanism applying vertical pulling force at the lower end through a hinge, two ends of the transverse connecting plate are respectively connected with the middle of the transverse connecting plate at the second layer at the upper end through one end of two hinges, and the other end of the transverse connecting plate at the second layer at the upper end is connected with the middle of the transverse connecting plate at the second layer at the upper end or directly connected with a lifting ring at the lower end of a lifting ring screw; two ends of each transverse connecting plate of the second layer at the upper end are respectively and directly connected with a lifting ring at the lower end of a lifting ring screw through two hinged parts at one end close to the central shaft of the device, and the other end of each transverse connecting plate is directly connected with a lifting ring at the lower end of the lifting ring screw or connected with the middle of the transverse connecting plate of the third layer at the upper end; two ends of the cross connecting plate of the third layer are directly connected with the lifting rings at the lower ends of the lifting ring screws through two hinged pieces respectively.
Further preferably, the fixing flange is provided with 4U-shaped grooves, and bolts arranged in the T-shaped mounting grooves on the square box penetrate through the 4U-shaped grooves and are fixed together in a compression joint mode through nuts. The U-shaped groove can adjust the installation position during installation, and is convenient to install.
Further preferably, the root fixing piece comprises an upper fixing piece with a semicircular clamping fixing hole at the lower end and a lower fixing piece with a semicircular clamping fixing hole at the upper end; two strip screws penetrate through the through holes of the upper fixing piece and are fixed in the threaded holes of the lower fixing piece; two ends of the lower fixing piece are fixed at the upper end of the support frame through two groups of bolts and nuts. The structure is simple, the installation is convenient, and the supporting capacity and the stability are higher. Preferably, a gap of 3mm is formed between the upper fixing member and the lower fixing member,
ensuring that the blade root is securely mounted on the root fixture.
Further preferably, when the blade body is clamped, an elastic rubber pad with the thickness of 3mm is respectively padded in the upper clamp cavity and the lower clamp cavity of each profiling clamp. The upper clamp cavity and the lower clamp cavity are separated from the blade body by the rubber pad, so that the blade body is protected from being collided by the profiling clamp, the upper clamp and the lower clamp of the profiling clamp are separated by a certain distance, and the clamping effect of the upper clamp and the lower clamp is ensured.
Aiming at the practical problems in the prior art, firstly, the number of the sections can be optimized, the number of the sections is reduced by fitting 6 sections in the initial stage into fewer sections, such as 3, 4 or 5 sections, the 6 sections can be continuously maintained, and the practical stress state in the test process is simulated on a computer, so that the stress condition of the practical blade is ensured to be met theoretically. Secondly, we combine the two forces experienced by each section into a resultant force F passing through the axis of the blade itselfResultant force，FResultant forceAt an angle to the vertical, as shown in FIG. 3, for the actual loading test, we only need to apply an FResultant forceThe purpose of exerting two forces in the counter-airflow direction and the rotation direction on the cross section can be achieved, through the simplification, the loading force is further simplified by half, and 6 forces, 8 forces, 10 forces and 12 forces are respectively reduced to 3 forces, 4 forces, 5 forces and 6 forces. Finally, we studied a loading tool that will eventually work on F for each sectionResultant forceThe force is synthesized to 1 force. The complicated process of the equipment debugging process in the loading force process is thoroughly solved.
When the static strength test is carried out, only the blade root threads of the blade are screwed in the thread mounting hole of the fixing flange, the joint of the blade root and the blade body is clamped and fixed by the root fixing piece at the upper end of the supporting frame, each copying clamp is clamped on the section required to be clamped by the blade body, the copying clamp is installed well, the position of the middle hinged part of each transverse connecting plate of the loading tool is adjusted according to the tensile force required to be exerted on each section, and the static strength test can be completed by exerting the tensile force by the mechanism exerting the vertical tensile force.
The static strength test device can achieve the purpose of static strength test only by loading one force, and is simple and convenient to operate; the structure is simple, the cost is low, the test accuracy is high, and the test efficiency is high. Through the utility model discloses to the actual loading test of blade, measure the actual deflection of blade, this deflection is unanimous basically with the deflection that the design initial stage calculated, and adopt the utility model discloses frock loading force measuring test product has been in experimental scene operation one year, does not have any quality problems, satisfies the user's requirement completely.
Drawings
FIG. 1 is a schematic structural diagram of a blade body of a blade artificially divided into 6 sections in static strength analysis;
FIG. 2 is a schematic illustration of a configuration for applying two forces to a section of a blade body;
FIG. 3 is a schematic diagram of the structure of two forces acting on a section of a blade body, which is equivalent to a resultant force;
fig. 4 is a front view of the present invention;
fig. 5 is a front view of the fixing flange of the present invention;
FIG. 6 is a cross-sectional view AA in FIG. 5;
FIG. 7 is a front sectional view of the middle root fixing member of the present invention;
FIG. 8 is a schematic structural view of a first cross-sectional profile modeling fixture of the present invention;
FIG. 9 is a schematic structural view of a profiling fixture of a second cross section in the present invention;
FIG. 10 is a schematic structural view of a profiling fixture of a third cross section in the present invention;
FIG. 11 is a schematic view of the structure of FIG. 1 in the direction A;
fig. 12 is a front view of a first embodiment of the middle loading tool of the present invention;
fig. 13 is a left side view of the first embodiment of the middle loading tool of the present invention;
fig. 14 is a front view of a middle vertical connecting plate of the middle loading tool of the present invention;
fig. 15 is a front view of a cross connecting plate in the middle loading fixture of the present invention;
fig. 16 is a front view of a second embodiment of the middle loading tool of the present invention;
fig. 17 is a front view of a third embodiment of the middle loading tool of the present invention;
fig. 18 is a front view of a fourth embodiment of the middle loading tool of the present invention.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
In the embodiment 1, firstly, the number of the sections is optimized, the three sections are fitted by 6 sections, and the actual stress state in the test process is simulated on a computer, so that the stress condition of the actual blade is ensured to be met theoretically. Secondly, we subject each section to two forces F against the direction of air flow and the direction of rotationCounter current flowAnd FRotateAre synthesized as one FResultant forceF of the reaction mixtureResultant forceThe opposite elongation force of (a) is exactly perpendicular to the blade axis. Setting F of the first cross sectionResultant forceAngle alpha to the vertical, F of the second sectionResultant forceAngle from vertical, called angle beta, and F for the third sectionResultant forceThe angle from the vertical is called the gamma angle and is reduced by this step from 6 forces to 3 forces. Finally, we studied a loading tool, which ultimately puts these F's into effectResultant forceThe force is synthesized to 1 force.
As shown in fig. 4 to 15, the testing apparatus of the present embodiment includes a square box 6, a fixing flange 5, a supporting frame 4, a root fixing member 1, 3 lifting bolts, 3 copying clamps 21, 22 and 23, and a loading tool 3. 7 is the blade root, 8 is the blade body. The fixed flange 5 is shaped like a Chinese character 'ji', the periphery of the fixed flange is fixedly arranged at the upper end part of the installation surface of the square box 6, and the center of the fixed flange is provided with a thread installation hole 52 at the end part of a blade root. Preferably, the fixing flange 5 is provided with 4U-shaped grooves 51, and bolts 9 arranged in T-shaped mounting grooves on the square box 6 penetrate through the 4U-shaped grooves 51 and are fixed together in a compression joint mode through nuts 10. The support frame 4 is fixed at the lower end of the blade root 7 at the joint of the blade root 7 and the blade body 8, the root fixing piece 1 is fixed at the upper end of the support frame 4, and a blade root clamping fixing hole 15, a thread mounting hole 52 and the clamping fixing hole 15 are concentric with a central shaft. Preferably, the root fixing piece 1 comprises an upper fixing piece 12 with a semicircular clamping fixing hole at the lower end and a lower fixing piece 13 with a semicircular clamping fixing hole at the upper end; two strip screws 11 penetrate through the through holes of the upper fixing piece 12 and are fixed in the threaded holes of the lower fixing piece 13; the two ends of the lower fixing piece 13 are fixed on the upper end of the support frame 4 through two groups of bolts 14 and nuts. Preferably, there is a 3mm gap between the upper fixing member 12 and the lower fixing member 13.
Each of the profiling clamps 21, 22 and 23 respectively comprises an upper clamp 214, 224 and 234 and a lower clamp 215, 225 and 235 which are fixed together by connecting bolts 211, 221 and 231, an integral cavity formed by an upper clamp cavity and a lower clamp cavity is completely matched with the cross section shape of the clamped blade body, and the parting surfaces of the upper clamp cavity and the lower clamp cavity are connecting lines 212, 222 and 232 of the maximum contour line of the front edge and the rear edge of the blade body. A cutting block with alpha, beta and gamma angles analyzed according to theory is cut off at the right end of the bottom surface of each lower clamp 215, 225 and 235 respectively, as shown in figure 8, the right end horizontal plane of the bottom surface and the left end inclined plane form the alpha, beta and gamma angles, threaded holes with central axes vertical to the right end horizontal plane and vertical to the axis of the blade are formed in the right end horizontal plane, and 213, 223 and 233 are vertical intersection points. The eye screws 216, 226 and 236 are comprised of integral screws 217, 227 and 237 and eyes 218, 228 and 238; screws 217, 227 and 237 are threadedly secured in threaded bores at the right end of the bottom surface of each of the lower clamps 215, 225 and 235. Preferably, when clamping the blade body, the upper and lower clamp cavities of each of the profiling clamps 21, 22 and 23 are filled with 3mm resilient rubber pads, respectively.
The loading tool 3 comprises a plurality of vertical connecting plates 31 with through holes 34 formed in the upper and lower parts, a plurality of transverse connecting plates 33 with through holes 331, 332 and 333 formed in the left and right ends and the middle parts, a plurality of groups of bolts 32 and nuts 35. The two vertical connecting plates 31 are fixed together at intervals by bolts 32 and nuts 35 to form a hinge with two hinge axes. The middle of the lower cross connecting plate 33 is connected with the lower mechanism for exerting vertical pulling force through a hinge, the two ends of the lower cross connecting plate 33 are respectively connected with the middle of the upper second-layer cross connecting plate 33 through two hinges, and the other end of the lower cross connecting plate is directly connected with a lifting ring 238 at the lower end of a lifting ring screw 236. The cross-connecting plate 33 of the second layer at the upper end is connected at both ends with lifting rings 218 and 228 at the lower ends of lifting ring screws 216 and 226, respectively, by two hinges. The two hinge axes between the cross web 33 of the second layer and the cross web 33 at the lower end can be moved left and right according to the requirements of the applied force. The loading tool 3 combines the force for pulling the three lifting ring screws into a vertical pulling force applied by the vertical pulling force mechanism. This is the best embodiment, can reach the requirement, and the test device structure is simplest.
Example 2, the other analyses were the same, except that 6 cross sections were still retained. The other structures of the test device of the embodiment are the same as those of the embodiment 1, except that the copying clamps with 6 sections are designed, and the structures of the copying clamps are the same as those of the embodiment 1; the loading tool needs to be designed to combine 6 loading forces into a tensile force. As shown in fig. 16, the lower cross-connecting plate 33 is connected to the lower vertical pulling mechanism through a hinge in the middle, and the two ends are connected to the middle of the upper two second-layer cross-connecting plates 33 through two hinges respectively. Two ends of each transverse connecting plate 33 of the second layer at the upper end are respectively and directly connected with a lifting ring at the lower end of a lifting ring screw through two hinged parts at one end close to the central shaft of the device, and the other end is connected with the middle of the transverse connecting plate 33 of the third layer at the upper end; the two ends of the cross connecting plate 33 of the third layer are directly connected with the lifting rings at the lower ends of the lifting ring screws through two hinged pieces respectively. The loading tool combines the force for pulling the six lifting ring screws into a vertical pulling force applied by the vertical pulling force mechanism. Although the structure of the device is much simpler than the existing structure, the 6 copying clamps and the complicated loading tool still make the structure of the device more complicated.
Example 3, the other analyses were the same except that the main body was divided into 5 sections. The other structures of the test device of the embodiment are the same as those of the embodiment 1, except that the copying clamps with 5 sections are designed, and the structures of the copying clamps are the same as those of the embodiment 1; the loading tool needs to be designed to combine 5 loading forces into one tensile force. As shown in fig. 17, the middle of the cross-connecting plate 33 at the lower end is connected with the mechanism for applying vertical pulling force at the lower end through a hinge, and the two ends are respectively connected with the middle of the two cross-connecting plates 33 at the second layer at the upper end through two hinges. Two ends of one transverse connecting plate 33 of the second layer at the upper end are directly connected with a lifting ring at the lower end of a lifting ring screw through two hinge parts respectively, one end of the other transverse connecting plate, close to the central shaft of the device, at the other end is directly connected with a lifting ring at the lower end of the lifting ring screw through two hinge parts respectively, and the other end is connected with the middle of the transverse connecting plate 33 of the third layer at the upper end; the two ends of the cross connecting plate 33 of the third layer are directly connected with the lifting rings at the lower ends of the lifting ring screws through two hinged pieces respectively. The loading tool combines the force for pulling the 5 lifting ring bolts into a vertical pulling force applied by the vertical pulling force mechanism.
Example 4, the same analysis was used except that the main body was divided into 4 sections. The other structures of the test device of the embodiment are the same as those of the embodiment 1, except that the profiling clamps with 4 sections are designed, and the structures of the profiling clamps are the same as those of the embodiment 1; the loading tool needs to be designed to combine 4 loading forces into one tensile force. As shown in fig. 18, the middle of the cross-connecting plate 33 at the lower end is connected with the mechanism for applying vertical pulling force at the lower end through one of the hinges, and the two ends are respectively connected with the middle of the two cross-connecting plates 33 at the second layer at the upper end through the other two hinges. Two ends of the transverse connecting plate 33 of each second layer at the upper end are directly connected with the lifting rings at the lower ends of the lifting ring screws respectively through other two hinge pieces. The loading tool combines the force for pulling the 4 lifting ring bolts into a vertical pulling force applied by the vertical pulling force mechanism.
Naturally, the invention also relates to other embodiments, and those skilled in the art can make corresponding changes and modifications according to the invention without departing from the spirit and substance of the invention, and these corresponding changes and modifications should be considered as improvements in the equivalent technology, and fall within the scope of protection of the claims of the invention.
Claims (6)
1. The utility model provides a composite material blade static strength test device which characterized in that: the blade body loading device comprises a square box, a fixed flange, a supporting frame, a root fixing piece, a plurality of profiling fixtures and lifting bolts, wherein the number of the profiling fixtures and the lifting bolts is the same as that of the sections of the blade body divided according to theoretical analysis;
the fixed flange is in a shape of a Chinese character 'ji', the periphery of the fixed flange is fixedly arranged at the upper end part of the square box mounting surface, and the center of the fixed flange is provided with a threaded mounting hole at the end part of a blade root;
the supporting frame is fixed at the lower end of the blade root at the joint of the blade root and the blade body, the root fixing piece is fixed at the upper end of the supporting frame, a blade root clamping fixing hole is formed in the root fixing piece, and the threaded mounting hole and the clamping fixing hole are concentric with the central shaft;
each profiling fixture comprises an upper fixture and a lower fixture which are fixed together, an integral cavity formed by an upper fixture cavity and a lower fixture cavity is completely matched with the shape of the section of a clamped blade, and the parting surfaces of the upper fixture cavity and the lower fixture cavity are the connecting line of the maximum contour lines of the front edge and the rear edge of the blade body; the right end of the bottom surface of each lower clamp is cut off, and two forces F which are analyzed according to theory and are applied to the clamped section of the lower clamp in the reverse air flow and the rotation directionCounter current flowAnd FRotateEquivalent FResultant forceThe included angle between the right horizontal plane and the left inclined plane of the bottom surface is FResultant forceThe included angle value between the right end horizontal plane and the vertical line is provided with a threaded hole, the central axis of which is vertical to the right end horizontal plane and is vertically intersected with the axis of the blade; each lifting ring screw is fixed in a threaded hole at the right end of the bottom surface of each lower clamp;
the loading tool comprises a plurality of vertical connecting plates with threaded holes at the upper and lower parts, a plurality of transverse connecting plates with through holes at the left and right ends and in the middle, a plurality of groups of bolts and nuts; the upper and lower parts of the two vertical connecting plates are fixed together at intervals by bolts and nuts to form a hinged part with two hinged shafts; the middle of the transverse connecting plate at the lower end is connected with a mechanism applying vertical pulling force at the lower end through a hinge, two ends of the transverse connecting plate are respectively connected with the middle of the transverse connecting plate at the second layer at the upper end through one end of two hinges, and the other end of the transverse connecting plate at the second layer at the upper end is connected with the middle of the transverse connecting plate at the second layer at the upper end or directly connected with a lifting ring at the lower end of a lifting ring screw; two ends of each transverse connecting plate of the second layer at the upper end are respectively and directly connected with a lifting ring at the lower end of a lifting ring screw through two hinged parts at one end close to the central shaft of the device, and the other end of each transverse connecting plate is directly connected with a lifting ring at the lower end of the lifting ring screw or connected with the middle of the transverse connecting plate of the third layer at the upper end; two ends of the cross connecting plate of the third layer are directly connected with the lifting rings at the lower ends of the lifting ring screws through two hinged pieces respectively.
2. The composite blade static strength test device of claim 1, wherein: the root fixing piece comprises an upper fixing piece with a semicircular clamping fixing hole at the lower end and a lower fixing piece with a semicircular clamping fixing hole at the upper end; two strip screws penetrate through the through holes of the upper fixing piece and are fixed in the threaded holes of the lower fixing piece; two ends of the lower fixing piece are fixed at the upper end of the support frame through two groups of bolts and nuts.
3. The composite blade static strength test device of claim 2, wherein: and a gap of 3mm is reserved between the upper fixing piece and the lower fixing piece.
4. The composite blade static strength testing apparatus of claim 1, 2 or 3, wherein: the fixing flange is provided with 4U-shaped grooves, bolts arranged in the T-shaped mounting grooves on the square box penetrate through the 4U-shaped grooves, and the fixing flange is fixed together through compression joint of nuts.
5. The composite blade static strength test device of claim 4, wherein: when the blade body is clamped, 3mm elastic rubber pads are respectively padded in the upper clamp cavity and the lower clamp cavity of each profiling clamp.
6. The composite blade static strength testing apparatus of claim 1, 2 or 3, wherein: when the blade body is clamped, 3mm elastic rubber pads are respectively padded in the upper clamp cavity and the lower clamp cavity of each profiling clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710449.0U CN215262848U (en) | 2020-11-20 | 2020-11-20 | Composite material blade static strength test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710449.0U CN215262848U (en) | 2020-11-20 | 2020-11-20 | Composite material blade static strength test device |
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| CN215262848U true CN215262848U (en) | 2021-12-21 |
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| CN202022710449.0U Withdrawn - After Issue CN215262848U (en) | 2020-11-20 | 2020-11-20 | Composite material blade static strength test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710551A (en) * | 2020-11-20 | 2021-04-27 | 惠阳航空螺旋桨有限责任公司 | Composite material blade static strength test device |
| CN112710551B (en) * | 2020-11-20 | 2024-08-02 | 惠阳航空螺旋桨有限责任公司 | Static strength test device for composite material blade |
-
2020
- 2020-11-20 CN CN202022710449.0U patent/CN215262848U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710551A (en) * | 2020-11-20 | 2021-04-27 | 惠阳航空螺旋桨有限责任公司 | Composite material blade static strength test device |
| CN112710551B (en) * | 2020-11-20 | 2024-08-02 | 惠阳航空螺旋桨有限责任公司 | Static strength test device for composite material blade |
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