CN114486139A - Vibration platform - Google Patents
Vibration platform Download PDFInfo
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- CN114486139A CN114486139A CN202210067769.XA CN202210067769A CN114486139A CN 114486139 A CN114486139 A CN 114486139A CN 202210067769 A CN202210067769 A CN 202210067769A CN 114486139 A CN114486139 A CN 114486139A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a vibration platform, which relates to the technical field of geotechnical engineering and comprises a fixed base, a vibration base and an installation base, wherein equipment needing vibration is installed on the installation base, the installation base is installed on the vibration base, the installation base can swing on the vibration base in the horizontal direction, the vibration base is installed on the fixed base, and a driving structure for driving the vibration base to shake up and down is also installed on the fixed base. The invention can simultaneously realize the swing in the horizontal direction and the shake in the vertical direction, thereby simulating the shake of the earthquake on the equipment on the shake platform, and ensuring that the analysis of the motion characteristics and the motion state of the soil body in the slope deformation process in the later period is more accurate, thereby analyzing the slope instability mechanism under the influence of earthquake factors.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a vibration platform.
Background
At present, geological disasters seriously affect the aspects of human survival, development, engineering construction, leisure activities and the like, and the diversity and the regional variability of the geological disasters are also determined by the complex and diverse particularity of geological environments. The landslide is the most common one in geological disasters, and refers to a natural phenomenon that rock soil on a slope is mainly under the action of gravity, the stress state in a weak zone (or surface) at a certain position in the slope body is changed under the influence of factors such as river scouring, underground water activity, rainwater soaking, earthquake, artificial slope cutting and the like, the strength of the weak zone (or surface) is reduced due to water or other physical and chemical actions, the structure of the weak zone is damaged due to vibration or other actions, and the weak zone generates shearing damage under the condition that the stress is greater than the strength, so that the rock soil above the weak zone is unstable and slides downwards and forwards along the whole or a plurality of blocks; meanwhile, landslide is also induced by coupling of various external factors, a large number of geological disasters such as landslide, collapse and debris flow occur every year, traffic interruption, river blockage, village and town burying, house destruction and farmland destruction are caused, and huge economic and personnel losses are formed.
At present, all vibration platforms used for simulating earthquake scenes can only realize horizontal swing or vertical shake, but cannot simultaneously realize horizontal swing and vertical shake, so that the simulated earthquake scenes in the test process are completely different from the actual earthquake scenes, the movement characteristics and the movement states of soil bodies in the slope deformation process cannot be accurately analyzed in the later period, and the final analysis result is completely different from the slope instability process in the actual engineering.
Disclosure of Invention
The invention aims to provide a vibration platform which can simultaneously realize horizontal direction swing and vertical direction vibration, so that the vibration of an earthquake on equipment on the vibration platform is simulated, the analysis of soil motion characteristics and motion states in the slope deformation process in the later period is more accurate, and the slope instability mechanism under the influence of earthquake factors is analyzed.
In order to realize the purpose of the invention, the technical scheme is as follows: the utility model provides a vibration platform, includes unable adjustment base, vibrations base and installation base, installs the equipment that needs vibrations on the installation base, and installs the pedestal mounting on vibrations base, but the installation base horizontal direction swing on vibrations base, and vibrations pedestal mounting still installs the drive structure of drive vibrations base shake from top to bottom on the unable adjustment base.
Furthermore, a plurality of supporting legs are arranged on the fixed base, a plurality of steel pipes are arranged on the vibration base, and the supporting legs are inserted into the steel pipes in a one-to-one sliding mode.
Furthermore, the driving structure comprises a rotating shaft and an engine, wherein the rotating shaft is rotatably supported on the fixed base, the engine is fixedly installed on the fixed base, a cam and a differential are installed on the rotating shaft, the lower surface of the vibration base is supported on the cam, and a driving gear meshed with the input end of the differential is further installed at the output end of the engine.
Furthermore, a driving gear is further mounted on the rotating shaft, a through groove is further formed in the vibration base, a shifting block penetrating through the through groove is further mounted on the mounting base, and the shifting block is meshed with the driving gear; and the vibration base is also provided with a reset mechanism for driving the installation base to reset.
Furthermore, canceling release mechanical system is including installing the guide block in both sides around the installation base respectively, and has certain clearance between the medial surface of at least one guide block and the installation base lateral wall, install reset spring between guide block and the installation base.
Furthermore, the guide block is I type, and one side of vibrations base is seted up the breach that corresponds with the guide block.
Further, canceling release mechanical system still includes the guide bar of installing both sides around vibrations base respectively, and two guide blocks slide the cover respectively and establish on two guide bars, and reset spring is located between guide block and the installation base, and the extending end of guide bar installs stop nut.
Further, the vibration platform also comprises a laser tachometer for measuring the rotating speed of the rotating shaft.
Furthermore, two limiting blocks capable of moving relatively are further installed on the vibration device, and the two limiting blocks are located on two opposite sides of the box body used for installing the side slope model.
Furthermore, the stopper is the angle steel, has T type spout on the vibrator, and the below of stopper has with T type spout sliding fit's grafting piece, and still have on the stopper with lock the locking screw of stopper.
The beneficial effect of the invention is that,
1. according to the invention, the mounting base reciprocates on the vibration base, and the driving structure drives the vibration base to vibrate up and down, so that equipment mounted on the mounting base can simultaneously receive horizontal reciprocating motion and vertical vibration, the vibration of the equipment on the vibration platform caused by an earthquake is simulated, the analysis of soil motion characteristics and motion states in the later deformation process of the side slope is more accurate, and the side slope instability mechanism under the influence of earthquake factors is analyzed.
2. In the actual use process, the invention can also simulate seismic waves of different seismic levels by changing the vibration force by adjusting the frequency of the engine, thereby analyzing the landslide law under different seismic levels.
Drawings
FIG. 1 is a block diagram of a vibration platform provided by the present invention;
FIG. 2 is a view showing an installation structure of a driving structure;
FIG. 3 is a bottom view of the vibration mount;
fig. 4 is a structural diagram of a stopper.
Reference numbers and corresponding part names in the drawings:
1. the automatic locking device comprises a fixed base, 2, a vibration base, 3, a steel pipe, 4, supporting legs, 5, a rotating shaft, 6, an engine, 7, a driving gear, 8, a differential mechanism, 9, a cam, 10, a driving gear, 11, an installation base, 12, a through groove, 13, a shifting block, 14, a guide block, 15, a guide rod, 16, a limiting nut, 17, a reset spring, 18, a notch, 19, a limiting block, 20, a T-shaped sliding groove, 21, an inserting block, 22 and a locking screw.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1 to 4, the vibration platform provided by the invention comprises a fixed base 1, a vibration base 2 and a mounting base 11, wherein the mounting base 11 is used for mounting equipment to be vibrated, the equipment to be vibrated can be a box body or other structures for mounting a side slope model, the fixed base 1, the vibration base 2 and the mounting base 11 are sequentially arranged from bottom to top, the vibration base 2 is mounted above the fixed base 1, and the mounting base 11 is mounted above the vibration base 2. But installation base 11 horizontal direction swing on vibrations base 2, vibrations base 2 can shake from top to bottom on unable adjustment base 1, and still install the drive structure on unable adjustment base 1, and the drive structure mainly used drives vibrations base 2 and shakes from top to bottom.
The driving structure drives the fixed base 1 to shake up and down, and the installation base 11 is installed on the fixed base 1, so that the fixed base 1 shakes up and down and the installation base 11 synchronously shakes up and down, and equipment finally installed on the installation base 11 synchronously shakes; meanwhile, the installation base 11 horizontally swings on the vibration base 2, so that the equipment installed on the installation base 11 synchronously swings. Through the cooperation of the up-and-down shaking of the shaking base 2 and the horizontal swinging of the mounting base 11, the equipment mounted on the mounting base 11 can be shaken in the horizontal direction and the vertical direction at the same time, so that the shaking of the mounting base 11 is the same as the shaking of an earthquake, the shaking of the earthquake is simulated, and the shaking of the equipment mounted on the mounting base 11 is completely the same as the shaking of the earthquake.
When the invention is used in the side slope instability test, the box body used for installing the side slope model can be directly installed on the installation base 11, so that the installation base 11 can synchronously swing back and forth and shake up and down while swinging back and forth horizontally, the side slope model can synchronously swing back and forth and shake up and down, the side slope model is subjected to the same vibration as the vibration in the earthquake, the analysis of the motion characteristics and the motion state of the soil body in the deformation process of the side slope at the later stage is more accurate, and the analysis result is completely the same as the side slope instability process in the actual engineering.
In some embodiments, the fixing base 1 has a plurality of supporting legs 4, the number of the supporting legs 4 is at least two, the supporting legs 4 can be symmetrically arranged along the fixing base 1, and the supporting legs 4 can also be uniformly arranged on the fixing base 1; meanwhile, the vibration base 2 is further provided with a plurality of steel pipes 3, the positions of the steel pipes 3 correspond to the positions of the supporting legs 4 one by one, the supporting legs 4 are inserted into the steel pipes 3 one by one, and the supporting legs 4 can slide up and down in the steel pipes 3 under the condition of external force, so that the shapes of the supporting legs 4 are the same as the inner diameter of the steel pipes 3, and the inner walls of the steel pipes 3 are in clearance fit with the outer walls of the supporting legs 4. Through supporting legs 4 and the cooperation of steel pipe 3, make vibration base 2 receive drive structure's drive back and can carry out the up-and-down motion when satisfying to vibration base 2 support, make vibration base 2's structure more firm when guaranteeing vibration base 2 shake from top to bottom.
In some embodiments, the driving structure comprises a rotating shaft 5 rotatably supported on the fixed base 1 through two bearing seats and an engine 6 fixedly mounted on the fixed base 1, wherein the engine 6 can adopt a variable frequency motor, a cam 9 and a differential 8 can be mounted on the rotating shaft 5, the differential 8 can be located in the middle of the rotating shaft 5, a driving gear 7 is mounted on an output shaft of the engine 6, and the driving gear 7 is meshed with the differential 8, so that the rotating shaft 5 is driven to rotate when the engine 6 rotates; meanwhile, one or more cams 9 can be arranged on the rotating shaft 5, the maximum radius of the cam 9 is larger than the distance between the rotating shaft 5 and the vibration base 2, and the minimum radius of the cam 9 is smaller than the distance between the rotating shaft 5 and the vibration base 2. When the cam 9 rotates to the highest point, the cam 9 jacks up the vibration base 2, at the moment, the vibration base 2 is located at the highest position, and the vibration base 2 is supported on the cam 9; when the cam 9 rotates to the lowest point, the cam 9 loses the support of the vibration base 2, the vibration base 2 automatically moves downwards through the gravity of the cam 9, the vibration base 2 is located at the lowest position, the cam 9 is driven to continuously rotate through the rotating shaft 5, and therefore the vibration base 2 moves up and down in a reciprocating mode, a box body used for installing a side slope model is longitudinally vibrated, and longitudinal waves in earthquake are simulated.
In some embodiments, a driving gear 10 is further mounted on the rotating shaft 5, and when the rotating shaft 5 rotates, the driving gear 10 rotates synchronously with the rotating shaft 5; simultaneously, still seted up logical groove 12 on the vibrations base 2, logical groove 12 is long waist type or rectangle, and the length direction who leads to groove 12 is perpendicular with the axis direction level of pivot 5, and still installs shifting block 13 on the installation base 11, and shifting block 13 runs through logical groove 12 and extends to drive gear 10, and the extension end of shifting block 13 is the cusp, and the extension end and the drive gear 10 meshing of shifting block 13. Here, when the driving gear 10 is engaged with the dial 13, the vibration base 2 is at the lowest position, i.e., when the cam 9 does not jack up the vibration base 2. The vibration base 2 is also provided with a reset mechanism, and the reset mechanism is mainly used for driving the mounting base 11 after displacement to reset.
When the driving gear 10 on the rotating shaft 5 rotates, the driving gear 10 dials the dial block 13, the dial block 13 drives the installation base 11 to move synchronously when being dialed, so that the installation base 11 generates displacement in the horizontal direction, after the installation base 11 moves, the resetting mechanism drives the installation base 11 to reset, and after the installation base 11 resets, when the driving gear 10 is meshed with the dial block 13 again, the driving gear 10 drives the installation base 11 to move again, so that the installation base 11 realizes reciprocating motion. The reciprocating motion of the installation base 11 in the horizontal direction and the reciprocating motion of the installation base in the vertical direction are used for the reciprocating motion of a box body for installing the side slope model in the horizontal direction and the reciprocating motion of the installation base in the vertical direction, so that the scene of the side slope model 2 under the earthquake is simulated together, and the motion situation of the side slope in the earthquake process is obtained by analyzing the motion situation of the side slope model 2.
In some embodiments, the reset mechanism includes guide blocks 14 respectively installed on the front and rear sides of the installation base 11, a certain distance is provided between the inner wall of at least one guide block 14 and the side wall of the vibration base 2, so that the installation base 11 can generate relative displacement on the vibration base 2, and through the cooperation of the two guide blocks 14, the two guide blocks 14 respectively limit the two sides of the installation base 11 under the condition that the installation base 11 can reciprocate, thereby avoiding the excessive displacement of the installation base 11 in the reciprocating process. When a certain distance is formed between the inner side wall of the guide block 14 and the side wall of the vibration base 2, a return spring 17 is installed in the distance, one end of the return spring 17 is tightly fixed with the vibration base 2, and the other end of the return spring 17 is tightly fixed with the guide block 14. When the rotating shaft 5 rotates, the driving gear 10 drives the shifting block 13 to enable the mounting base 11 to generate displacement on the vibration base 2, the reset spring 17 is stretched or compressed, after the mounting base 11 generates displacement, the shifting block 13 cannot be continuously shifted by the driving gear 10, so that the shifting block 13 loses the acting force of the driving gear 10, and at the moment, the reset spring 17 pushes the mounting base 11 during shrinkage or automatic reset through the elastic force of the reset spring 17, so that the mounting base 11 automatically resets.
In some embodiments, the guide blocks 14 located at the front and rear sides of the mounting base 11 are i-shaped, at this time, notches 18 are formed in the front side of the vibration base 2, the rear side of the vibration base 2, or the front and rear sides of the vibration base 2, the guide blocks 14 are in sliding fit with the notches 18, a certain gap is formed between the inner side surface of each guide block 14 and the bottom of each notch 18, and the return spring 17 is located between the bottom of each notch 18 and the guide block 14. Through the matching of the guide block 14 and the notch 18, when the mounting base 11 needs to do reciprocating motion on the vibration base 2, the guide block 14 slides in the notch 18, and when the guide block 14 does not move at the bottom of the notch 18, the guide block cannot move forward continuously, so that the mounting base 11 cannot move forward continuously, and the displacement of the mounting base 11 is limited. Here, the two guide blocks 14 may also be in an i-shape of one guide block 14, in a 7-shape of the other guide block 14, or in a 7-shape of both guide blocks 14. When one guide block 14 is I-shaped and the other guide block 14 is 7-shaped, a return spring 17 is arranged between the inner wall of the 7-shaped guide block 14 and the vibration base 2; when the two guide blocks 14 are both in a 7 shape, a return spring 17 can be arranged between the inner wall of one of the guide blocks 14 and the vibration base 2, or the return springs 17 can be arranged between the inner walls of the two guide blocks 14 and the vibration base 2.
Since the driving gear 10 and the cam 9 are rotated simultaneously when the rotation shaft 5 of the present invention is rotated, and the driving gear 10 pokes the shifting block 13 when rotating to make the mounting base 11 generate displacement in the horizontal direction, and the cam 9 will jack up the vibration base 2 when rotating, and the installation base 11 and the box body for installing the slope model will move upwards synchronously when the vibration base 2 is jacked up, therefore, when the driving gear 10 dials the dial 13, the dial 13 will not only be displaced away from the driving gear 10 in the horizontal direction, and the shifting block 13 will move upward and away from the driving gear 10 synchronously with the vibration base 2 and the installation base 11, at this time, when the return spring 17 pushes the mounting base 11 to return, the shifting block 13 does not collide with the driving gear 10, and when the vibration base 2 and the mount base 11 move downward, the dial 13 is again engaged with the driving gear 10.
In some embodiments, the reset mechanism further includes guide rods 15 respectively installed on the front side and the rear side of the vibration base 2, an axial direction of the guide rods 15 is the same as a displacement direction of the installation base 11, the reset spring 17 is sleeved on the guide rods 15, the guide block 14 is provided with a through hole in sliding fit with the guide rods 15, one end of the reset spring 17 abuts against a side surface of the vibration base 2, the other end of the reset spring 17 abuts against the guide block 14, and an extending end of the guide rods 15 is further provided with a limit nut 16 for limiting the guide block 14 to be separated from the guide rods 15. Here, when the guide blocks 14 on the front and rear sides of the mounting base 11 are i-shaped, the guide rod 15 is located in the notch 18; simultaneously, the guide bar 15 of vibrations base 2 front and back both sides also can be a plurality ofly, and when being located the guide bar 15 of vibrations base 2 with one side for a plurality of, a plurality of guide bar 15 intervals are arranged, and at this moment, reset spring 17 also is a plurality of, and a plurality of reset spring 17 overlap respectively one by one on a plurality of guide bar 15, and the through-hole on the guide block 14 also is a plurality of. Through guide block 14 and guide bar 15 sliding fit, make installation base 11 when the horizontal motion, lead to the cooperation of guide bar 15 and guide block 14, make installation base 11 can only reciprocating motion and can not the side to side movement, avoid installation base 11 to swing at will on vibrations base 2, make the stability between installation base 11 and the vibrations base 2 obtain guaranteeing.
In some embodiments, two limit blocks 19 are further installed on the installation base 11 in the vibration device 9, and after the box body for installing the slope model is installed on the installation base 11, the two limit blocks 19 are respectively located at two opposite sides of the box body for installing the slope model, that is, the two limit blocks 19 may be located at the outer sides of two opposite sides of the box body for installing the slope model or at two opposite corners of the box body for installing the slope model; simultaneously, the interval between two stopper 19 is adjustable, and two stopper 19 can be close to relatively or keep away from relatively promptly, and when two stopper 19 were close to, the box for installing the side slope model was blocked tightly between two stopper 19, and the box for installing the side slope model realizes fixedly, and when two stopper 19 kept away from, stopper 19 lost the chucking with the box that is used for installing the side slope model, can take off the box that is used for installing the side slope model from installation base 11 this moment. Through the cooperation of two stopper 19 jointly, not only it is more convenient to use in the installation of the box that installs the side slope model, and makes the box that is used for installing the side slope model of mountable not unidimensional on the installation base 11.
In some embodiments, the limiting blocks 19 are angle steels, the angle steels are used for covering right angles of the box body for installing the side slope model, and the two angle steels cover two opposite angles of the box body for installing the side slope model; the mounting base 11 in the vibrating device 9 is also provided with a T-shaped chute 20, the T-shaped chute 20 is a through groove 12, the opening width of the T-shaped chute 20 is smaller than the groove bottom width of the T-shaped chute 20, and the axial direction of the T-shaped chute is consistent with the diagonal direction of a box body for mounting a side slope model; the lower end of the limiting block 19 is further provided with an inserting block 21, the inserting block 21 is located below a corner of the limiting block 19, the inserting block 21 is in sliding fit with the T-shaped sliding groove 20, a threaded hole is formed in the limiting block 19, the upper end of the threaded hole penetrates through the upper end face of the limiting block 19, the lower end of the threaded hole penetrates through the lower end face of the inserting block 21, and a locking screw 22 is further installed in the threaded hole. By screwing the locking screw 22, the lower end of the locking screw 22 is abutted against the bottom of the T-shaped chute 20, so that the insertion block 21 is locked and fixed in the T-shaped chute 20; when the position of the limiting block 19 needs to be adjusted, the locking screw 22 is loosened, the lower end of the locking screw 22 loses the tight contact with the bottom of the T-shaped sliding groove 20, the insertion block 21 loses the locking, and the insertion block 21 can normally slide in the T-shaped sliding groove 20.
In this embodiment, the limiting blocks 19 can also directly adopt a vertical plate structure, at this time, four limiting blocks 19 can be adopted, so that the four limiting blocks 19 are respectively located at the four outer sides of the box body for installing the side slope model, at this time, two T-shaped chutes 20 need to be arranged, one T-shaped chute 20 extends along the length direction of the installation base 11, the other T-shaped chute 20 extends along the width direction of the installation base 11, so that the two T-shaped chutes 20 are arranged in a crisscross manner, wherein the insertion blocks 21 at the lower ends of the two limiting blocks 19 are respectively inserted at the two ends of one T-shaped chute 20, the insertion blocks 21 at the lower ends of the other two limiting blocks 19 are respectively inserted at the two ends of the other T-shaped chute 20, and through the common cooperation of the four limiting blocks 19, the four limiting blocks 19 respectively block the four surfaces of the box body for installing the side slope model, so that after the box body for installing the side slope model is installed on the installation base 11, the box body for installing the side slope model cannot move on the installation base 11, and the box body for installing the side slope model is fixedly installed.
In some embodiments, vibrations platform still includes the laser tachometer (not shown in the figure) that is used for measuring 5 rotational speeds of pivot, and is concrete, and laser tachometer can direct mount on unable adjustment base 1 or on the bearing frame, and still install the reflection of light paper that corresponds with laser tachometer on the pivot 5, and reflection of light paper cooperation laser tachometer detects the rotational speed of pivot 5 to reach drive gear 10's rotational speed, thereby reach vibration frequency, make things convenient for follow-up record and calculation data. Here, the laser tachometer can also be installed outside the vibrating device, and the specific installation position of the laser tachometer can be adjusted according to the actual use condition.
When a slope instability test needs to be performed, the box body provided with the slope model can be placed on the installation base 11, the locking screws 22 on the limiting blocks 19 are loosened, the limiting blocks 19 slide along the T-shaped sliding grooves 20 through the matching of the T-shaped sliding grooves 20 and the insertion blocks 21 and gradually approach the box body for installing the slope model, when the limiting blocks 19 abut against the outer wall of the box body for installing the slope model, the locking screws 22 are screwed down, the lower ends of the screws abut against the groove bottoms of the T-shaped sliding grooves 20, and the limiting blocks 19 and the installation base 11 are locked and fixed; the outer wall of the box body for installing the side slope model is abutted tightly through a plurality of limiting blocks 19, and the box body for installing the side slope model is fixed on the installation base 11.
When the earthquake scene needs to be simulated, the engine 6 is started, the engine 6 drives the driving gear 7 to rotate, the differential gear 8 is rotated by the meshing of the driving gear 7 and the input end of the differential gear 8, and when the differential gear 8 rotates, the rotating shaft 5 is driven to rotate, so that the cam 9 on the rotating shaft 5 and the driving gear 10 synchronously rotate, and when the cam 9 rotates, when the convex part of the cam 9 is gradually close to the vibration base 2, the cam 9 gradually jacks up the vibration base 2 to enable the vibration base 2 to move upwards, thereby make installation base 11, be used for installing the box of side slope model all by jack-up, along with cam 9's continuation rotation, vibration base 2 is kept away from gradually to the bellying of cam 9, and vibration base 2, installation base 11 and the box that is used for installing the side slope model then through the automatic downstream of self gravity, make vibration base 2, installation base 11 and the box that is used for installing the side slope model realize shake from top to bottom.
When the driving gear 10 rotates, the driving gear 10 shifts the shifting block 13 along with the rotation of the driving gear 10, so that the shifting block 13 moves along the through groove 12, the shifting block 13 drives the mounting base 11 to advance on the vibration base 2 while moving, when the mounting base 11 advances, the guide block 14 slides along the guide rod 15, the return spring 17 is compressed, when the shifting block 13 drives the mounting base 11 to advance, not only the shifting block 13 loses the meshing with the driving gear 10, but also the shifting block 13 and the driving gear 10 have a certain distance in the horizontal direction, and because the cam 9 jacks up the vibration base 2, the shifting block 13 and the driving gear 10 also have a certain distance in the vertical direction, so that the shifting block 13 loses the acting force of the driving gear 10, at the moment, the return spring 17 pushes the mounting base 11 to reset through the self elastic force, so that the mounting base 11 realizes the reciprocating motion on the vibration base 2, the installation base 11 reciprocates left and right, and the box body for installing the side slope model synchronously reciprocates along with the installation base 11, so that the side slope model 2 installed in the box body for installing the side slope model realizes horizontal reciprocating motion.
Through the cooperation of the horizontal reciprocating motion and the vertical vibration of the slope model 2, the lateral seismic wave and the longitudinal seismic wave received by the slope model 2 are simulated.
In the present invention, when the vibrator 9 is in the simulated earthquake environment, the excitation force of the vibrator 9 is calculated as follows:
F＝(m0+m1+m2+……)A。
in the formula: f-excitation force (N); m is0-the active mass (kg) of the moving part of the vibrating device 9; m is1-mass (kg) of the vibration mount 902 and mounting mount 911 countertops; m is2Test pieces (e.g. clamps, ann)Screw installation, etc.) mass (kg); m is0+m1+m2+ … … is the total weight of all objects on the present invention (including equipment later mounted on the mounting base 911, etc.); a-test acceleration (m/s)2)。
Wherein a ═ ω v; wherein, v is the test speed; ω is the angular velocity.
Wherein ω is 2 pi f; wherein, pi-circumference ratio; f is the frequency of the test.
Wherein n is2＝Z1/Z2*n1(ii) a Wherein n is2Differential 8 pinion (driving transverse oscillation) speed; n is1Differential 8 main gear (engine-borne gear) speed; z1Differential 8 main gear tooth number; z2Differential 8 secondary gear tooth number.
Meanwhile, the calculation formula of the stress cycle number of the driving gear 10 in the invention is as follows:
N1＝60nJLH
in the formula: n-the rotation speed; j-the number of times of meshing of the driving gear 10 and the shifting block 13 in one rotation; LH-working time.
The invention can be used for installing the box body of the side slope model in the side slope instability test, and can also be used as a common vibration platform, and the installation base can be used for installing the screening box body of the vibration screen and other equipment needing vibration.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a vibration platform, its characterized in that includes unable adjustment base (1), vibrations base (2) and installation base (11), the equipment that needs vibrations is installed on installation base (11), and installation base (11) are installed on vibrations base (2), but installation base (11) horizontal direction swing on vibrations base (2), but vibrations base (2) are installed on unable adjustment base (1), still install the drive structure that the drive shakes about unable adjustment base (2) on unable adjustment base (1).
2. The vibration platform according to claim 1, wherein the fixed base (1) is provided with a plurality of supporting feet (4), the vibration base (2) is provided with a plurality of steel pipes (3), and the supporting feet (4) are slidably inserted into the steel pipes (3) one by one.
3. Vibration platform according to claim 1, characterized in that the driving structure comprises a rotating shaft (5) rotatably supported on the fixed base (1) and an engine (6) fixedly mounted on the fixed base (1), a cam (9) and a differential (8) are mounted on the rotating shaft (5), the lower surface of the vibration base (2) is supported on the cam (9), and a driving gear (7) meshed with the input end of the differential (8) is further mounted at the output end of the engine (6).
4. The vibration platform according to claim 3, wherein the rotating shaft (5) is further provided with a driving gear (10), the vibration base (2) is further provided with a through groove (12), the mounting base (11) is further provided with a shifting block (13) penetrating through the through groove (12), and the shifting block (13) is meshed with the driving gear (10); and a reset mechanism for driving the mounting base (11) to reset is further installed on the vibration base (2).
5. The vibration platform according to claim 4, characterized in that the reset mechanism comprises guide blocks (14) respectively installed on the front and rear sides of the installation base (11), a certain gap is formed between the inner side surface of at least one guide block (14) and the side wall of the installation base (11), and a reset spring (17) is installed between the guide block (14) and the installation base (11).
6. Vibration platform according to claim 5, characterized in that said guide block (14) is i-shaped and one of the sides of the vibration base (2) is provided with a notch (18) corresponding to the guide block (14).
7. The vibration platform of claim 5, wherein the reset mechanism further comprises guide rods (15) respectively installed on the front side and the rear side of the vibration base (2), the two guide blocks (14) are respectively sleeved on the two guide rods (15) in a sliding manner, the reset spring (17) is located between the guide blocks (14) and the installation base (11), and the extending ends of the guide rods (15) are provided with limit nuts (16).
8. The vibration platform according to claim 1, further comprising a laser tachometer for measuring the rotational speed of the shaft (5).
9. The vibration platform according to claim 1, characterized in that two stoppers (19) capable of moving relatively are further mounted on the vibration device (9), and the two stoppers (19) are located at two opposite sides of the box body (1) for mounting the slope model.
10. The vibration platform according to claim 8, characterized in that the limiting block (19) is an angle steel, the vibration device (9) is provided with a T-shaped chute (20), an insertion block (21) which is in sliding fit with the T-shaped chute (20) is arranged below the limiting block (19), and the limiting block (19) is further provided with a locking screw (22) which is used for locking the limiting block (19).
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Cited By (3)
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| CN114578021A (en) * | 2022-01-20 | 2022-06-03 | 西华大学 | Wireless measurement system and test method for measuring slope instability |
| CN115371929A (en) * | 2022-10-24 | 2022-11-22 | 常州中英科技股份有限公司 | Multilayer circuit board vibration stability detection device and detection method |
| CN115430599A (en) * | 2022-08-30 | 2022-12-06 | 博众精工科技股份有限公司 | Mechanical vibration device |
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