CN219455437U - Special fixture for testing high-temperature vibration fatigue performance of engine blade - Google Patents
Special fixture for testing high-temperature vibration fatigue performance of engine blade Download PDFInfo
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- CN219455437U CN219455437U CN202320818255.3U CN202320818255U CN219455437U CN 219455437 U CN219455437 U CN 219455437U CN 202320818255 U CN202320818255 U CN 202320818255U CN 219455437 U CN219455437 U CN 219455437U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model relates to the technical field of mechanical vibration resistance testing, in particular to a special fixture for testing high-temperature vibration fatigue performance of an engine blade, which comprises: a clamping portion; switching the water-cooling transition section; the water-cooling device comprises a water-through base, wherein a water-cooling part is arranged in the water-through base; the clamping part is rigidly connected with the water-through base through the switching water-cooling transition section. For large-magnitude tests, when the output of the vibration equipment is limited, the vibration table applies force to the bladeThe fixture structure is used for making the blade amplifying tool system resonate under a certain order of resonance frequency to obtain (1 multiplied by 10) under a certain cycle 8 ) The fatigue limit of the test piece reaches the ideal effect that the vibration table has low output and the test piece vibrates in high magnitude.
Description
Technical Field
The utility model relates to the technical field of mechanical vibration resistance testing, in particular to a special fixture for testing high-temperature vibration fatigue performance of an engine blade.
Background
The aeroengine blade is a key part of the aeroengine, the working environment of the aeroengine blade is very severe, and is influenced by higher centrifugal load, aerodynamic load, high-temperature load, acoustic load and mechanical vibration load, so that static and dynamic stress of the aeroengine blade is higher, high-cycle fatigue is often generated easily due to vibration, blade cracks and even fracture are caused, the safety of the aeroengine is seriously influenced, the engine blade occupies 68% of failure and damage due to vibration fatigue according to statistics, the vibration fatigue characteristic and service life of the blade structure are seriously influenced, and the safety and reliability of the engine are seriously influenced.
With the great investment in the design and manufacture of aero-engine blades, the requirements for the fatigue life and fatigue strength test of the blades are also increasing, and particularly in the aspect of mechanics, the vibration characteristics and the high cycle fatigue limit of the blades at room temperature and the working temperature are obtained through the vibration fatigue test. The tool clamp is a process device for mechanical environment test engineering, and has the main functions that: (1) connecting a test piece and a vibration table top; (2) the vibration load of the test is transmitted to the test piece without distortion. However, aiming at the ideal effects of low output of the vibrating table and high-magnitude vibration of the test piece when the output of the vibrating equipment is limited in large-magnitude test, the technical problem to be solved by the technicians in the field is how to complete the vibration fatigue performance test of the blade by effectively amplifying the output magnitude of the vibrating table.
Disclosure of Invention
The utility model provides a special fixture for testing high-temperature vibration fatigue performance of an engine blade, which is characterized in that a load frequency is near the resonance frequency of a blade amplification tool system by applying a cyclic load to the blade, so that the high-cycle fatigue limit of the blade is obtained.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a special fixture of engine blade high temperature vibration fatigue performance test, its characterized in that: comprising the following steps: a clamping portion; switching the water-cooling transition section; the water-cooling device comprises a water-through base, wherein a water-cooling part is arranged in the water-through base; the clamping part is rigidly connected with the water-through base through the switching water-cooling transition section. The clamping part and the switching water-cooling transition section are affected by the actual working temperature of the blade, the material is 40CrMo steel, the processing performance is good, the toughness is good, the creep strength and the lasting strength are high at high temperature, and in order to ensure that the weight of the blade amplifying tool system is relatively small, the water-through base is made of aluminum.
Preferably, the clamping part is formed by welding a door frame type clamping seat and a cylindrical semi-hollow base; the top of the clamping part is provided with a compression screw which is matched with the clamping part through a threaded hole to fix the blade. In order to avoid stress concentration, the periphery of the outer part of the door frame type clamp is chamfered by 45 degrees, and the inner part of the door frame type clamp is chamfered by a round angle.
Preferably, the number of the compression screws is 1 to 3, and the compression strength is adjusted according to the requirement.
Preferably, the switching water-cooling transition section is a hollow cylinder, and the clamping part is rigidly connected with the upper end surface of the switching water-cooling transition section by arranging a sinking hexagonal screw on the upper end surface of the cylindrical semi-hollow base.
Preferably, the water through base is a hollow cylindrical sleeve welding part with a small diameter and a large diameter, and a plurality of cold water pipes are placed in the water through base to ensure that the temperature is below 100 ℃ and the normal work of the vibrating table is not affected.
Preferably, the bottom of the water through base is provided with a supporting plate, the supporting plate is uniformly provided with mounting holes, and the fastening bolts penetrate through the mounting holes to be connected to the vibrating table.
Preferably, 8 to 16 fastening bolts can provide different fastening strength when connected with the vibration table according to the requirement.
The utility model has the beneficial effects that: aiming at the large-magnitude test and when the output of vibration equipment is limited, a vibration table applies a cyclic load to a blade, a clamp structure is designed to enable a blade amplifying tool system to resonate at a certain order of resonance frequency, and the vibration table is used for obtaining (1 multiplied by 10) under a certain cycle 8 ) The fatigue limit of the test piece reaches the ideal beneficial effect that the vibration table has low output and the test piece vibrates in high magnitude.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the front structure of a special fixture of the present utility model;
FIG. 2 is a schematic side view of a blade-clamp assembly of the present utility model.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, a special fixture for testing high-temperature vibration fatigue performance of an engine blade in the present utility model includes: a clamping portion 1; a water-cooling transition section 2 is connected in a switching way; the water-through base 3 is internally provided with a water-cooling part; the clamping part is rigidly connected with the water-through base 3 through the switching water-cooling transition section 2. The clamping part 1 can be formed by welding a doorframe type clamping seat and a cylindrical semi-hollow base 4, the upper end of the cylindrical semi-hollow base 4 is rigidly connected with the upper end of the switching water-cooling transition section 2 through a screw 5, and the lower end of the switching water-cooling transition section 2 is fixedly connected with the upper end of the water-through base 3 through a screw 6. During installation, mortises of the blades 9 are placed in the doorframe-type clamping seat 1 in parallel, the blade body is suspended, the blade basin is upwards, and the clamping ends of the blades are pressed by screws, so that the blades 9 are fixed on the clamp.
In order to facilitate the assembly of the clamp, in a preferred embodiment, the upper part of the doorframe-type clamping seat is provided with a threaded hole 7, the clamping arm is a compression screw 8, and the screw penetrates through the threaded hole 7 to extend downwards to compress the clamping end of the blade and is fixedly connected.
The number of the compression bolts is 1 to 3, different compression strengths can be provided, and the compression strength is provided to be applied to blades 9 with different specifications.
The switching water-cooling transition section 2 is a hollow cylinder, and the clamping part 1 is rigidly connected with the upper end surface of the switching water-cooling transition section 2 by arranging a sinking hexagonal screw on the upper end surface of the cylindrical semi-hollow base 4.
The water-through base 3 is a hollow cylindrical sleeve welding part, the diameter is small at the top and large at the bottom, a plurality of cold water pipes are placed in the water-through base, the temperature is guaranteed to be below 100 ℃, the normal work of the vibrating table is not affected, and the lower end of the water-through transition section 2 is fixedly connected with the upper end face of the water-through base 3 through a screw.
The circular support plate 10 at the lower part of the water through base 3 is provided with uniformly distributed mounting holes, the circular support plate 10 passes through the mounting holes through fastening bolts to be fixedly connected with the vibrating table, the more the number of the fastening bolts is, the greater the provided fastening strength is, the 8 to 16 fastening bolts are required according to the actual fastening strength, and the fatigue limit of the vibration test blade 9 can be carried out after the installation is completed.
The utility model relates to a special fixture for testing high-temperature vibration fatigue performance of a certain engine blade, which comprises the following mounting steps:
step 1, the upper end of a cylindrical semi-hollow base 4 of a clamping part is fixedly connected with the upper end of a switching water-cooling transition section 2 through a screw 5;
step 2, the lower end of the switching water-cooling transition section 2 is fixedly connected with the upper end of the water-passing base 3 through a screw;
step 3, when the blade is installed, the tenon of the blade is placed in the doorframe type clamping seat 1 in parallel, the blade body is suspended, the blade basin is upwards, and the blade basin is fastened on the clamping end of the blade through a screw;
and 4, connecting the mounted blade integral clamp with the table top of the vibration table 11 through mounting holes by using a circular support plate 10 at the lower part of the water through base 3.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (7)
1. A special fixture for testing of engine blade high temperature vibration fatigue performance, its characterized in that: comprising the following steps:
a clamping portion (1);
a switching water-cooling transition section (2);
the water-cooling device comprises a water-through base (3), wherein a water-cooling part is arranged in the water-through base (3);
the clamping part (1) is rigidly connected with the water-through base (3) through the switching water-cooling transition section (2).
2. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 1, wherein the special fixture comprises: the clamping part (1) is formed by welding a door frame type clamping seat and a cylindrical semi-hollow base (4); the top of the clamping part (1) is provided with a compression screw (8), and the compression screw (8) is matched with the clamping part (1) through a threaded hole (7).
3. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 2, wherein the special fixture is characterized in that: the number of the compression screws (8) is 1 to 3.
4. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 2, wherein the special fixture is characterized in that: the switching water-cooling changeover portion (2) is a hollow cylinder, and the clamping portion (1) is rigidly connected with the upper end face of the switching water-cooling changeover portion (2) through a sunken hexagonal screw (5) arranged on the upper end face of the cylindrical semi-hollow base (4).
5. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 1, wherein the special fixture comprises: the water through base (3) is a hollow cylindrical sleeve welding piece, the diameter of the water through base is small, the diameter of the water through base is large, and a plurality of cold water pipes are placed in the water through base.
6. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 1, wherein the special fixture comprises: the bottom of the water through base (3) is provided with a supporting plate (10), the supporting plate (10) is uniformly provided with mounting holes, and fastening bolts penetrate through the mounting holes to be connected to the vibrating table (11).
7. The special fixture for testing the high-temperature vibration fatigue performance of the engine blade according to claim 6, wherein the special fixture comprises: the number of the fastening bolts is 8 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320818255.3U CN219455437U (en) | 2023-04-13 | 2023-04-13 | Special fixture for testing high-temperature vibration fatigue performance of engine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320818255.3U CN219455437U (en) | 2023-04-13 | 2023-04-13 | Special fixture for testing high-temperature vibration fatigue performance of engine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219455437U true CN219455437U (en) | 2023-08-01 |
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ID=87409003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320818255.3U Active CN219455437U (en) | 2023-04-13 | 2023-04-13 | Special fixture for testing high-temperature vibration fatigue performance of engine blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219455437U (en) |
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2023
- 2023-04-13 CN CN202320818255.3U patent/CN219455437U/en active Active
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