CN113639950A - A single-rod pulling type vibration table test device and test method for characterizing centrifugal force - Google Patents

Abstract

The invention discloses a single-rod pull type vibration table testing device and a single-rod pull type vibration table testing method for representing centrifugal force, and relates to the technical field of testing equipment. The testing device can realize the organic combination of centrifugal force, vibration and centrifugal force plus vibration tests and efficiently test the comprehensive mechanical property of the tested object.

Description

A single-rod pulling type vibration table test device and test method for characterizing centrifugal force

technical field

The invention relates to the technical field of testing equipment, in particular to a single-rod pulling-type vibration table testing device and testing method for characterizing centrifugal force.

Background technique

Aero-engine is an extremely complex thermal machine. The cost of R&D and design is very huge. It requires a lot of capital and labor costs. It involves a wide variety of disciplines and industries. The development of a new type of aero-engine often requires the common progress of science and technology from all walks of life. , it can be said that aero-engine is the product that can best reflect the level of a country's industrial technology, so it is called the jewel in the industrial crown. Since the advent of aero-engines, various failures have occurred frequently in the process of R&D, design and use, among which failures caused by blades account for a large proportion. According to relevant statistics, failures caused by vibration account for about 60% of engine failures, while failures caused by blade vibration account for more than 70% of vibration failures. For the safety of aviation flight, the failure of blade vibration is the biggest threat in the design and operation of aero-engines. Blade-type failures often lead to catastrophic flight accidents, resulting in huge loss of life and property safety. Therefore, many research and production institutions in the world spend a lot of money and manpower to study the vibration characteristics of blades. At present, the research on the vibration characteristics of the blade is mainly realized by numerical calculation and modal test. The numerical calculation cost is low, but because its processing and materials belong to virtual simulation, it is difficult to reflect the real and specific vibration characteristics of the blade. Therefore, using real materials to carry out modal tests on an electromagnetic vibration table is an important method that must be used in blade development.

In the prior art, the blade is only fixed by clamping parts and fastening screws during the clamping process, but the influence of centrifugal force on the vibration of the blade cannot be accurately simulated. It is very difficult or even impossible to directly develop a vibration table with centrifugal force function; using a high-speed turntable with an air-excited vibration test method can theoretically simulate the working condition of the blade with centrifugal force vibration, but it needs to install a whole disk of blades, and the trial production cost is huge , and the data measurement technology and requirements of this scheme are extremely complex, and the test conditions that can be simulated are very limited.

SUMMARY OF THE INVENTION

The defects of the prior art mentioned in the above-mentioned background are not solved, and the object of the present invention is to provide a single-rod pulling type vibration table test device for characterizing centrifugal force, so as to provide a rapid cooling function and can accurately simulate centrifugal force. Testing, vibration testing, and a testing device that organically combines centrifugal force and vibration testing can efficiently examine the comprehensive mechanical properties of the tested object.

One aspect of the present invention provides a single-rod pulling-type vibration table testing device for characterizing centrifugal force, including:

Electromagnetic vibrating table (1), receiving plate (2), fixture support platform (3), fixture (4), fixing part (5), tensiometer stand (6), tensiometer (7) and simulation part (8); in,

The bearing plate (2) is arranged on the electromagnetic vibration table (1), and the bearing plate (2) is fixedly connected to the table surface of the electromagnetic vibration table (1) through eight-hole bolts;

The clamping platform (3) is slidably arranged above the receiving plate (2);

The clamp (4) is arranged above the clamp support platform (3);

The clamp (4) comprises a male clamping plate (41), a female clamping plate (42) and a blade clamping groove (43);

The male splint (41) is arranged on the fixture support platform (3), the female splint (42) is snap-connected above the male splint (41), and a blade clamping groove is formed inside the female splint (42). (43);

The fixing parts (5) are arranged on both sides of the clamp (4);

The tension meter stand (6) is arranged on one side of the fixture support stand (3);

The tension meter (7) is arranged on the tension meter stand (6), one end of the tension meter (7) faces the direction of the clamp (4), and the other end is provided with the analog component (8).

Further, a plurality of anti-skid ribs (9) are provided on the upper surface of the male splint (41).

Further, the fixing member (5) includes two fixing plates (54), two fixing jaws (51), four transverse snaps (52), two fixing springs (53), and a fixing cylinder (55) and a pressure plate (56); wherein,

Both of the two fixing plates (54) are vertically fixed on the fixture support platform (3);

The two fixing jaws (51) are respectively arranged on both sides of the clamp (4), and the two fixing jaws (51) are both rotatably arranged on the two fixing plates (54);

The four transverse buckles (52) are respectively fixed on one end of the two fixing claws (51) in pairs, and the two ends of the two fixing springs (53) are respectively connected with the two fixing claws (51) one end;

The fixed cylinder (55) is arranged on the fixture support platform (3), and the pressing plate (56) is arranged at the output end of the fixed cylinder (55).

Further, a U-shaped groove (31) for storing the cooling liquid is provided inside the clamp support platform (3), which is used to adjust the working temperature of the clamp support platform (3) and the electromagnetic vibration table (1).

Further, both ends of the fixture support platform (3) are provided with screw slide tables (10), and the output ends of the two screw slide tables (10) are respectively fixedly connected to both ends of the female splint (42). .

Further, the simulation component (8) includes a support seat (81), a baffle plate (82), two support plates (83), a turbine (84), a worm (85), a rack (86) and a gear (87) );

The support base (81) is fixedly arranged at one end of the tension meter base (6);

the baffle plate (82) is fixedly arranged above the support seat (81);

The two support plates (83) are fixedly arranged above the support base (81);

The worm (85) is rotatably arranged between the two support plates (83), the turbine (84) is arranged above the worm (85), and the turbine (84) is engaged with the worm (85);

The rack (86) is slidably arranged above the support seat (81);

A through hole for the rack (86) to slide is further opened below the baffle plate (82);

The gear (87) is fixedly arranged at one end of the worm (85), and the rack (86) meshes with the gear (87). One side of the baffle plate (82) is provided with a locking and fixing member (88).

Further, the locking and fixing component (88) includes a rotating handle (881), a turntable (882), a rotating shaft (883), an air cylinder (884) and an air clamp (885); wherein,

One end of the rotating shaft (883) penetrates the baffle plate (82) and is connected to the turbine (84);

The turntable (882) is rotatably arranged on the other end of the rotating shaft (883);

The rotating handle (881) is arranged on the turntable (882);

The cylinder (884) is arranged on the support seat (81);

The air clamp (885) is arranged at the output end of the air cylinder (884), and the jaw end of the air clamp (885) faces the direction of the turntable (882).

Further, the simulation component (8) includes a reaction force column (801), a latch (802), a guide rod (803) and a scale bolt hole (804); wherein,

The reaction force column (801) is fixedly arranged on the receiving plate (2);

One end of the guide rod (803) is connected to one end of the tension gauge (7);

A plurality of the scale bolt holes (804) are arrayed on the guide rod (803);

The latches (802) are respectively movably connected with a plurality of scale bolt holes (804).

Another aspect of the present invention provides a test method based on the above-mentioned test device, comprising:

Put one end of the tenon of the blade into the blade clamping groove (43), press the female splint (42) down to engage the male splint (41), and clamp and fix the tenon end of the blade;

Adjust the height of the fixture support platform (3), make a fixed connection between the slider on the screw slide table (10) and the fixture (4), and drive the fixture (4) to move up and down to adjust the height, and adjust the blade to be in line with the tension gauge ( 7) Keep the same horizontal position, and use the fixing part (5) to fix the fixture (4) after the height adjustment is completed;

After the fixing is completed, the simulated part (8) is connected to the other end of the blade, and the magnitude of the pulling force on the blade is adjusted by the simulated part (8), thereby loading centrifugal forces of different intensities;

After the adjustment is completed, open the electromagnetic vibration table (1) to conduct vibration test on the receiving plate (2), the fixture (4) and the blade;

During the test, the temperature is lowered by circulating the cooling liquid in the fixture platform 3 .

Further, it also includes:

After the blade tenon is put into the blade clamping groove (43), the movement of the fixed cylinder (55) drives the pressing plate (56) to move to press down the mother clamping plate (42), and the mother clamping plate (42) presses down on the blade clamping groove (43). to clamp;

After the mother splint (42) is pressed down, the upper ends of the two fixed jaws (51) are retracted from both sides to the middle to a vertical state by the retracted tension of the fixed spring (53), and the upper ends of the two fixed jaws (51) hold the mother splint (42) The upper surface is buckled, and after the other end provided below the two fixed jaws (51) is pulled inwardly by the pulling force of the contraction of the fixed spring (53), the two fixed jaws (51) are (51) The transverse buckle (52) provided below buckles the bottom of the mother splint (42), thereby completing the fixation of the clamp (4);

After the test is completed, the fixed cylinder (55) drives the pressure plate (56) to move upward, and the pressure plate (56) no longer presses down on the mother splint (42), thereby releasing the fixation of the clamp (4) by the two fixed jaws (51);

The loading of centrifugal forces of different intensities includes: after connecting one end of the tension meter 7 with one end of the rack (86), simulating centrifugal forces of different sizes according to the moving distance of the rack (86), and passing the tension meter (7) or include: pulling the guide rod (803) in the opposite direction of the dynamometer (7), after the numerical value on the dynamometer (7) is set, insert the latch (802) into the scale bolt hole (804) for fixing, and after the vibration test is completed, the latch (802) is pulled out to cancel the fixing.

Compared with the prior art, the beneficial effects of the present invention are:

(1) When the present invention works, put one end of the tenon of the blade into the blade clamping groove, press the female plywood down to make the male plywood and the female plywood engage, and the female plywood and the male plywood clamp the blade tenon while the clipping is fixed. Fix, adjust the height of the fixture platform to match the connection with the simulated part. After the height adjustment is completed, use the fixture to fix the fixture. After the fixing is completed, connect the simulated component to the other end of the blade, and adjust the pulling force on the blade through the simulated component. , so as to simulate centrifugal force of different intensities. After all adjustments are completed, open the electromagnetic vibration table to conduct vibration tests on the receiving plate and the fixtures and blades set on the receiving plate, and the strength and rigidity of the fixtures must be high enough to avoid resonance with the blades. It can meet the requirements of vibration testing. Simultaneously simulate centrifugal force and vibration testing through a simple material device, so as to realize the integration of the two tests, reduce the test time and save the test cost.

(2) At the same time, the testing device of the present invention can realize the organic combination of three types of tests of centrifugal force, vibration and centrifugal force plus vibration, so as to efficiently inspect the comprehensive mechanical properties of the tested object.

(3) When the present invention works, the blade sliding displacement during the vibration process is also prevented through the design of several anti-skid edges, thereby ensuring the rigor of the experiment and the accuracy of the experimental data.

(4) When working in Embodiment 1 of the present invention, after connecting one end of the tension gauge with one end of the rack, the worm that meshes with the worm is driven to rotate by the rotation of the worm, and the worm drives the gear to rotate when rotating, and then drives the worm that meshes with the gear. The rack slides, and the rack slides away from the dynamometer, thereby pulling one end of the dynamometer, and simulates different sizes of centrifugal force according to the moving distance of the rack, and effectively observes the centrifugal force through the reading on the dynamometer. Since the experiment needs to simulate different centrifugal forces, it is necessary to continuously adjust the size of the centrifugal force, and use the turbine, worm, rack and gear for linkage to make the adjusted value more accurate.

(5) When the present invention works, stop the rotation of the turntable after adjusting the centrifugal force value. At this time, the output end of the cylinder drives the air clamp to rise to a suitable position on the turntable. The output end of the air clamp works, and the turntable is clamped and fixed. After the vibration test is completed , the air clamp releases the clamping and fixing of the turntable, and the output end of the cylinder drives the air clamp to move vertically downward to a stop just below the turntable, preventing the turntable from rotating during the experiment and affecting the experimental data, thus ensuring the rigor of the experiment.

(6) It is easy to form high heat during the vibration process, which will affect the life of the test equipment. In the present invention, a U-shaped groove 31 is designed in the fixture support platform 3, so that the cooling liquid can pass through the fixture support platform 3 in a larger area, and the reduction in time is reduced. The temperature of the fixture support platform 3 and the electromagnetic vibration table 1 can realize rapid temperature control and prolong the service life of the test device.

(7) When working, after the blade tenon end of the blade is clamped inside the fixture 4 before starting the vibration test, since most of the blades have a certain radian, it is necessary to adjust the blade to keep the tension gauge 7 before the vibration test. At the same horizontal position, at this time, the slider on the screw slide table 10 is fixedly connected with the fixture 4 to drive the fixture 4 to move up and down to adjust the height, and the blade is adjusted to maintain the same horizontal position as the tension gauge 7. The sliding block stops sliding to maintain stability, thereby avoiding large test errors and improving the accuracy of the test.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic diagram of the three-dimensional structure of Embodiment 1 of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of Embodiment 2 of the present invention;

Fig. 3 is the sectional view of the clamping platform of the present invention;

4 is a schematic structural diagram of the simulation component 8 according to Embodiment 1 of the present invention;

5 is a schematic structural diagram of the simulation component 8 according to Embodiment 2 of the present invention;

6 is a schematic structural diagram of the first working state of the fixed locking component of the present invention;

7 is a schematic structural diagram of the second working state of the fixed locking component of the present invention;

Fig. 8 is the exploded structure schematic diagram of the first working state of the partial structure of the fixing part of the present invention;

Fig. 9 is the exploded structure schematic diagram of the second working state of the partial structure of the fixing part of the present invention;

Figure 10 is a schematic diagram of the overall structure of the fixing part of the present invention;

FIG. 11 is a schematic structural diagram of the clamp of the present invention.

Reference number:

1. Electromagnetic vibration table; 2. Receiving plate; 3. Fixture bearing platform; 31. U-shaped groove; 4. Fixture; 41. Male splint; 42. Female splint; 43. Blade clamping groove; , fixed gripper; 52, transverse buckle; 53, fixed spring; 54, fixed plate; 55, fixed cylinder; 56, pressure plate; 6, tension gauge pedestal; 7, tension gauge; 8, analog part; 9, anti-skid edge ;10, screw slide table; 81, support seat; 82, baffle; 83, support plate; 84, turbine; 85, worm; 86, rack; 87, gear; 88, lock the fixed part; 881, rotate Handle; 882, turntable; 883, rotating shaft; 884, cylinder; 885, air clamp; 801, reaction column; 802, latch; 803, guide rod; 804, scale bolt hole.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.

The components of the embodiments of the invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

1 to 11 , Embodiment 1 of the present invention provides a single-rod pulling-type vibration table test device for characterizing centrifugal force, including an electromagnetic vibration table 1 , a receiving plate 2 , a fixture support table 3 , and a fixture 4. The fixing part 5, the tension meter pedestal 6, the tension meter 7 and the simulation part 8, the receiving plate 2 is arranged on the electromagnetic vibration table 1, and the receiving plate 2 is fixedly connected to the table surface of the electromagnetic vibration table 1 through eight-hole bolts, so The clamp support 3 is slidably arranged above the receiving plate 2, the clamp 4 is disposed above the clamp support 3, and the clamp 4 includes a male splint 41, a female splint 42 and a blade clamping groove 43, and the male splint 41 is provided with On the clamping platform 3, the female clamping plate 42 is snap-connected above the male clamping plate 41, the blade clamping groove 43 is formed inside the female clamping plate 42, and the fixing parts 5 are arranged on both sides of the clamping plate 4, so The tension gauge pedestal 6 is arranged on one side of the clamp support 3, the tension gauge 7 is arranged on the tension gauge pedestal 6, and one end of the tension gauge 7 faces the direction of the clamp 4, and the analog component 8 is arranged on the other side of the tension gauge 7. one end.

Preferably, a plurality of anti-skid ribs 9 are provided on the upper surface of the male splint 41 .

When working, the design of several anti-skid ribs 9 increases the friction force between the blade and the tenon of the blade to prevent the blade sliding and displacement during the vibration process, thereby ensuring the rigor of the experiment and the accuracy of the experimental data. Put one end of the blade into the fixture 4 Clamp.

Specifically, the fixing member 5 includes two fixing plates 54 , two fixing jaws 51 , four lateral buckles 52 and two fixing springs 53 , and the two fixing plates 54 are vertically fixed on the clamp support. On the table 3, the two fixing jaws 51 are respectively arranged on both sides of the clamp 4, and the two fixing jaws 51 are rotatably arranged on the two fixing plates 54, and the four lateral snaps 52 are respectively Two ends of the two fixed jaws 51 are fixedly arranged, two ends of the two fixed springs 53 are respectively connected to one end of the two fixed jaws 51, and the fixed cylinders 55 are arranged on the clamping platform 3, so The pressing plate 56 is provided at the output end of the stationary cylinder 55 .

Preferably, a U-shaped groove 31 for storing the cooling liquid is provided inside the fixture support platform 3 .

When working, it is easy to generate high heat during the vibration process, which will affect the life of the test equipment. The design of the U-shaped groove 31 in the fixture platform 3 enables the coolant to pass through the fixture platform 3 in a larger area, and reduces the fixture platform in time. 3 and the working temperature of the electromagnetic vibration table 1 to prolong the service life of the test device. During the test, the temperature is lowered by circulating the cooling liquid in the fixture platform 3 .

Specifically, both ends of the clamp support platform 3 are provided with screw slide tables 10 , and the output ends of the two screw slide tables 10 are respectively fixedly connected to both ends of the female clamp plate 42 .

As shown in FIG. 4 , the simulation component 8 includes a support base 81 , a baffle plate 82 , two support plates 83 , a turbine 84 , a worm 85 , a rack 86 and a gear 87 , and the support base 81 is fixedly arranged on the tension gauge pedestal. 6, the baffle 82 is fixedly arranged above the support base 81, the two support plates 83 are fixedly arranged above the support base 81, the worm 85 is rotatably arranged between the two support plates 83, the The turbine 84 is arranged above the worm 85, and the turbine 84 is engaged with the worm 85. The rack 86 is slidably arranged above the support seat 81, and a through hole for the rack 86 to slide is also opened under the baffle 82, so The gear 87 is fixedly arranged on one end of the worm 85 , and the rack 86 is engaged with the gear 87 . One side of the baffle plate 82 is provided with a locking and fixing member 88 .

When working in Example 1 of the present invention, after connecting one end of the tension gauge 7 with one end of the rack 86, the worm 85 meshing with the worm 84 is driven to rotate by the rotation of the turbine 84, and the worm 85 drives the gear 87 to rotate when it rotates, and then drives the worm 85 to rotate. The rack 86 meshed with the gear 87 slides, and the rack 86 slides away from the tension meter 7, thereby pulling one end of the tension meter 7, and simulates different sizes of centrifugal force according to the moving distance of the rack 86. The reading can effectively observe the magnitude of the centrifugal force of the test. During the experiment, due to the needs of the experiment, different centrifugal forces will be simulated, so it is necessary to continuously adjust the magnitude of the centrifugal force. more precise.

Specifically, the locking and fixing member 88 includes a rotating handle 881, a rotating plate 882, a rotating shaft 883, a cylinder 884 and an air clamp 885. One end of the rotating shaft 883 penetrates the baffle plate 82 and is connected to the turbine 84. The rotating plate 882 is set on the other end of the rotating shaft 883, the rotary handle 881 is set on the turntable 882, the cylinder 884 is set on the support base 81, the air clamp 885 is set at the output end of the cylinder 884, and the air clamp 885 The end of the jaws faces the direction of the turntable 882.

When working, stop the rotation of the turntable 882 after adjusting the centrifugal force value. At this time, the output end of the air cylinder 884 drives the air clamp 885 to rise to the proper position of the turntable 882. The output end of the air clamp 885 works, and the turntable 882 is clamped and fixed, and the vibration test is completed. Afterwards, the air clamp 885 releases the clamping and fixation of the turntable 882, and the output end of the air cylinder 884 drives the air clamp 885 to move vertically downward to a place slightly lower than the turntable 882 to stop, preventing the turntable 882 from rotating during the experiment and affecting the experimental data, thereby The accuracy of the experiment is guaranteed.

Example 2

As shown in FIG. 2 and FIG. 5 , Embodiment 2 of the present invention provides a single-rod pulling-type vibration table test device for characterizing centrifugal force. The difference from Embodiment 1 is that the simulation component 8 includes a reaction force column. 801, latch 802, guide rod 803 and scale bolt hole 804, the reaction force column 801 is fixedly arranged on the receiving plate 2, one end of the guide rod 803 is connected to one end of the tensile force meter 7, a number of the scale bolt holes 804 The array is arranged on the guide rod 803 , and the latches 802 can be movably connected with several scale bolt holes 804 respectively.

During operation, the guide rod 803 is pulled in the opposite direction of the tension meter 7, and the value on the tension meter 7 is observed. After the value is appropriate, the latch 802 is inserted into the scale bolt hole 804 for fixing. After the vibration test is completed, the latch 802 is pulled out. Cancel the fixation to facilitate the adjustment of the value in the next test. The device is simple and easy to implement, and has low cost. The use of the tension meter 7 is convenient for viewing the test data, making the process of simulating centrifugal force visualized.

Example 3

This embodiment provides a test method based on the single-rod pull-out vibration table test device for characterizing centrifugal force based on Embodiment 1 and Embodiment 2.

When working, put one end of the tenon of the blade into the blade clamping groove 43, press down the female splint 42 so that the male splint 41 and the female splint 42 are engaged. Clamping and fixing, adjusting the height of the fixture support platform 3 to facilitate the connection between the blade and the tension gauge 7. After the height adjustment is completed, use the fixing part 5 to fix the fixture 4. After the fixing is completed, connect the simulation part 8 to the other end of the blade. The simulation part 8 adjusts the pulling force on the blade, thereby simulating centrifugal force of different intensities. After all adjustments are completed, the electromagnetic vibration table 1 is turned on to conduct a vibration test on the receiving plate 2 and the fixture 4 and the blade set on the receiving plate 2, and the fixture 4 itself The strength and stiffness are high enough to not resonate with the blade, which can meet the vibration test requirements. Simultaneously simulate the centrifugal force and vibration test through a simple material device, realize the integration of the two tests, reduce the test time and save the test cost. The test device of the invention can realize the organic combination of three types of tests of centrifugal force, vibration and centrifugal force plus vibration, and realizes the comprehensive mechanical performance of the tested object with high efficiency.

After the blade tenon is put into the blade clamping groove 43, the fixed cylinder 55 moves to drive the pressure plate 56 to move, the pressure plate 56 moves to press down the mother clamp 42, and the mother clamp 42 presses down to clamp the blade clamping groove 43. At this time, the mother clamp After 42 is pressed down, the upper ends of the two fixed jaws 51 are retracted from both sides to the middle to a vertical state by the retracted pulling force of the fixed spring 53, and the upper ends of the two fixed jaws 51 fasten the upper surface of the mother splint After the other end of the claw 51 is tightened inwardly due to the pulling force of the contraction of the fixed spring 53, the transverse buckle 52 disposed under the two fixed clamping claws 51 fastens the bottom of the mother plate 42, thereby The fixation of the clamp 4 is realized. After the work is completed, the fixed cylinder 55 drives the pressure plate 56 to move upward, and the pressure plate 56 no longer presses the mother clamp plate 42, thereby releasing the two fixed jaws 51. The fixation of the clamp 4, the device vibrates. During the process, the fixture 4 is well fixed to ensure the accuracy of the experiment.

It is easy to form high heat during the vibration process, which will affect the life of the test equipment. The design of the U-shaped groove 31 in the fixture platform 3 enables the cooling liquid to pass through the fixture platform 3 in a larger area, and reduces the clamp platform 3 and electromagnetic waves in time. The working temperature of the shaking table 1 prolongs the service life of the test device. During the test, the temperature is lowered by circulating the cooling liquid in the fixture platform 3 .

After the blade tenon end of the blade is clamped inside the fixture 4 before starting the vibration test, since most of the blades have a certain radian, it is necessary to adjust the blade to the same horizontal position as the tension meter 7 before the vibration test. The slider on the screw slide table 10 is fixedly connected with the fixture 4 to drive the fixture 4 to move up and down to adjust the height, adjust the blade to keep the same horizontal position as the tension gauge 7, and the slider on the screw slide table 10 stops sliding to adjust the height. Keep it stable, so as to avoid large test errors and improve the accuracy of the test.

When working in Example 1 of the present invention, after connecting one end of the tension gauge 7 with one end of the rack 86, the worm 85 meshing with the worm 84 is driven to rotate by the rotation of the turbine 84, and the worm 85 drives the gear 87 to rotate when it rotates, and then drives the worm 85 to rotate. The rack 86 meshed with the gear 87 slides, and the rack 86 slides away from the tension meter 7, thereby pulling one end of the tension meter 7, and simulates different magnitudes of centrifugal force according to the moving distance of the rack 86. The reading can effectively observe the magnitude of the centrifugal force of the test. During the experiment, due to the need to simulate different centrifugal forces, it is necessary to continuously adjust the magnitude of the centrifugal force. Use the turbine 84, worm 85, rack 86 and gear 87 to coordinate and coordinate the adjusted value. more precise.

After adjusting the centrifugal force value, stop the rotation of the turntable 882. At this time, the output end of the air cylinder 884 drives the air clamp 885 to rise to the proper position of the turntable 882. The output end of the air clamp 885 works, and the turntable 882 is clamped and fixed. After the vibration test is completed, the air The clamp 885 is released from the clamping and fixing of the turntable 882, and the output end of the air cylinder 884 drives the air clamp 885 to move vertically downward to a point slightly lower than the turntable 882 to stop, preventing the turntable 882 from rotating during the experiment and affecting the experimental data, thus ensuring the experimental data. accuracy.

When the second embodiment of the present invention works, the guide rod 803 is pulled in the opposite direction of the tension meter 7, and the value on the tension meter 7 is observed. After the value is appropriate, the latch 802 is inserted into the scale bolt hole 804 for fixing. The latch 802 is pulled out to cancel the fixation, which is convenient for adjusting the value in the next test. This device is simple and easy to implement, and has low cost. It is convenient to check the test data by using the tension meter 7, which makes the process of simulating centrifugal force visualized.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. The utility model provides a single pole pull formula sign centrifugal force's shaking table testing arrangement which characterized in that: the device comprises an electromagnetic vibration table (1), a bearing plate (2), a clamp bearing table (3), a clamp (4), a fixing component (5), a tension meter pedestal (6), a tension meter (7) and a simulation component (8); wherein,

the bearing plate (2) is arranged on the electromagnetic vibration table (1), and the bearing plate (2) is fixedly connected with the table top of the electromagnetic vibration table (1) through eight-hole bolts;

the clamp bearing platform (3) is arranged above the bearing plate (2) in a sliding manner;

the clamp (4) is arranged above the clamp bearing platform (3);

the clamp (4) comprises a male clamping plate (41), a female clamping plate (42) and a blade clamping groove (43);

the male clamping plate (41) is arranged on the clamp bearing platform (3), the female clamping plate (42) is connected above the male clamping plate (41) in a clamping mode, and a blade clamping groove (43) is formed in the female clamping plate (42);

the fixing parts (5) are arranged on two sides of the clamp (4);

the tension meter pedestal (6) is arranged on one side of the clamp bearing platform (3);

the tension meter (7) is arranged on the tension meter pedestal (6), one end of the tension meter (7) faces to the direction of the clamp (4), and the other end of the tension meter is provided with the simulation component (8).

2. The single-rod pull type vibration table testing device for characterizing centrifugal force according to claim 1, wherein: the upper surface of the male splint (41) is provided with a plurality of anti-skid edges (9).

3. The single-rod pull type vibration table testing device for characterizing centrifugal force according to claim 1, wherein: the fixing part (5) comprises two fixing plates (54), two fixing clamping jaws (51), four transverse buckles (52), two fixing springs (53), a fixing air cylinder (55) and a pressing plate (56); wherein,

the two fixing plates (54) are vertically and fixedly arranged on the clamp bearing platform (3);

the two fixed clamping jaws (51) are respectively arranged on two sides of the clamp (4), and the two fixed clamping jaws (51) are rotationally arranged on the two fixed plates (54);

the four transverse buckles (52) are respectively and pairwise fixedly arranged at one ends of the two fixed clamping jaws (51), and two ends of the two fixed springs (53) are respectively connected to one ends of the two fixed clamping jaws (51);

the fixed air cylinder (55) is arranged on the clamp bearing platform (3), and the pressing plate (56) is arranged at the output end of the fixed air cylinder (55).

4. The single-rod pull type vibration table testing device for characterizing centrifugal force according to claim 1, wherein: the clamp bearing platform is characterized in that a U-shaped groove (31) for storing cooling liquid is formed in the clamp bearing platform (3) and used for adjusting the working temperature of the clamp bearing platform (3) and the working temperature of the electromagnetic vibration platform (1).

5. The single-rod pull type vibration table testing device for characterizing centrifugal force according to claim 1, wherein: the fixture bearing platform is characterized in that the two ends of the fixture bearing platform (3) are respectively provided with a screw rod sliding table (10), and the output ends of the screw rod sliding tables (10) are respectively fixedly connected with the two ends of the female clamping plate (42).

6. A single rod pull type centrifugal force characterizing vibration table testing device according to claim 1, wherein: the simulation component (8) comprises a supporting seat (81), a baffle plate (82), two supporting plates (83), a worm wheel (84), a worm (85), a rack (86) and a gear (87);

the supporting seat (81) is fixedly arranged at one end of the tension meter pedestal (6);

the baffle (82) is fixedly arranged above the supporting seat (81);

the two supporting plates (83) are fixedly arranged above the supporting seat (81);

the worm (85) is rotatably arranged between the two support plates (83), the worm wheel (84) is arranged above the worm (85), and the worm wheel (84) is meshed with the worm (85);

the rack (86) is arranged above the supporting seat (81) in a sliding manner;

a through hole for the rack (86) to slide is formed below the baffle (82);

the gear (87) is fixedly arranged at one end of the worm (85), the rack (86) is meshed with the gear (87), and a locking fixing part (88) is arranged on one side of the baffle (82).

7. The single-rod pull-type vibration table testing device for characterizing centrifugal force according to claim 6, wherein: the locking fixing part (88) comprises a rotating handle (881), a rotating disc (882), a rotating shaft (883), an air cylinder (884) and an air clamp (885); wherein,

one end of the rotating shaft (883) penetrates through the baffle (82) and then is connected with the turbine (84);

the rotating disc (882) is rotatably arranged at the other end of the rotating shaft (883);

the rotating handle (881) is arranged on the turntable (882);

the air cylinder (884) is arranged on the supporting seat (81);

the air clamp (885) is arranged at the output end of the air cylinder (884), and the clamping jaw end of the air clamp (885) faces the direction of the turntable (882).

8. A single rod pull type centrifugal force characterizing vibration table testing device according to claim 1, wherein: the simulation component (8) comprises a reaction column (801), a bolt lock (802), a guide rod (803) and a scale bolt hole (804); wherein,

the reaction column (801) is fixedly arranged on the bearing plate (2);

one end of the guide rod (803) is connected with one end of the tension meter (7);

the scale bolt holes (804) are arranged on the guide rod (803) in an array manner;

the bolt lock (802) is movably connected with the scale bolt holes (804).

9. A method for testing a device according to any one of claims 1 to 8, comprising:

one end of the tenon of the blade to be detected is placed into the blade clamping groove (43), the female clamping plate (42) is pressed downwards to be clamped with the male clamping plate (41), and the tenon end of the blade is clamped and fixed;

adjusting the height of the clamp bearing platform (3), fixedly connecting a sliding block on the screw rod sliding table (10) with the clamp (4) to drive the clamp (4) to move up and down to adjust the height, adjusting the blade to the same horizontal position with the tension meter (7), and fixing the clamp (4) by using a fixing part (5) after the height adjustment is finished;

after the fixing is finished, the simulation part (8) is connected with the other end of the blade, and the pulling force on the blade is adjusted through the simulation part (8), so that centrifugal forces with different strengths are loaded;

opening the electromagnetic vibration table (1) to perform vibration test on the bearing plate (2), the clamp (4) and the blade;

and cooling liquid in the fixture bearing platform 3 is used for cooling circularly in the test process.

10. The test method of claim 9, further comprising:

after the blade tenon is placed in the blade clamping groove (43), the fixed air cylinder (55) moves to drive the press plate (56) to move to press the female clamp plate (42) downwards, and the female clamp plate (42) presses downwards to clamp the blade clamping groove (43);

after the female clamping plate (42) is pressed downwards, the upper ends of the two fixed clamping jaws (51) are driven to be folded from two sides to the middle to be in a vertical state through the contracting tension of the fixed springs (53), the upper surfaces of the female clamping plate (42) are buckled by the upper ends of the two fixed clamping jaws (51), the lower parts of the female clamping plate (42) are buckled by the transverse buckles (52) arranged below the two fixed clamping jaws (51) after the two fixed clamping jaws (51) are inwards tensioned by the other ends arranged below the two fixed clamping jaws (51) due to the contracting tension of the fixed springs (53), and thus the clamp (4) is fixed;

after the test is finished, the fixed air cylinder (55) drives the pressing plate (56) to move upwards, and the pressing plate (56) does not press down the female clamping plate (42), so that the two fixed clamping jaws (51) are released from fixing the clamp (4);

the loading of centrifugal forces of different strengths comprises: after one end of the tension meter 7 is connected with one end of the rack (86), centrifugal forces with different sizes are simulated according to the moving distance of the rack (86), and the centrifugal force is obtained through the reading on the tension meter (7); or comprises the following steps: the guide rod (803) is pulled towards the tension meter (7) in the opposite direction, after the numerical value on the tension meter (7) is set, the bolt lock (802) is inserted into the scale bolt hole (804) for fixing, and after the vibration test is finished, the bolt lock (802) is pulled out and is removed from the fixing.

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