CN111103110B - Mechanical vibration law monitoring devices - Google Patents
Mechanical vibration law monitoring devices Download PDFInfo
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- CN111103110B CN111103110B CN202010149026.8A CN202010149026A CN111103110B CN 111103110 B CN111103110 B CN 111103110B CN 202010149026 A CN202010149026 A CN 202010149026A CN 111103110 B CN111103110 B CN 111103110B
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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
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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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
- G01M13/00—Testing of machine parts
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
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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
- G01M7/025—Measuring arrangements
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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
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a mechanical vibration law monitoring device, which comprises a bottom plate, wherein two side plates are fixedly connected at the upper end of the bottom plate in a front-back symmetrical mode, a vibration mechanism is arranged between the side plates, the vibration mechanism comprises a vibration plate which is arranged between the side plates in a sliding mode, a through groove is formed in the vibration plate in a front-back through mode, two rollers are arranged in the through groove in a rolling mode, two supporting plates are connected between the two supporting plates, and an optical axis is connected between the rollers in a sliding mode.
Description
Technical Field
The invention relates to the field of mechanical vibration, in particular to a mechanical vibration law monitoring device.
Background
The mechanical vibration refers to regular reciprocating motion of an object or a mass point near the equilibrium position of the object or the mass point, and the strength of the vibration is measured by the vibration quantity, wherein the vibration quantity can be displacement, speed or acceleration of a vibrating body.
The existing mechanical vibration testing method is calculated through theoretical analysis, the theoretical analysis is different from the mechanical vibration under the actual condition, the existing mechanical vibration testing device is tested under a certain vibration condition, and the condition and the factor influencing the mechanical vibration cannot be tested.
Disclosure of Invention
In order to solve the problems, the mechanical vibration law monitoring device is designed in the embodiment, and comprises a bottom plate, two side plates are fixedly connected symmetrically around the upper end of the bottom plate, a vibration mechanism is arranged between the side plates and comprises a vibration plate arranged between the side plates in a sliding mode, a through groove is formed in the vibration plate in a front-back through mode, two rollers are arranged in the through groove in a rolling mode, two supporting plates are connected between the rollers, an optical shaft is connected in the rollers in a sliding mode, the front end and the rear end of the optical shaft are fixedly connected to the side plates on two sides, adjusting plates are symmetrically arranged on the front side and the rear side of the vibration plate in a sliding mode, the optical shaft is connected with the adjusting plates in a sliding mode, a damping spring is fixedly connected between the adjusting plates and the supporting plates, and the supporting, The roller and the vibrating plate vibrate in the front and back directions in a reciprocating manner, because the roller is connected with the vibrating plate in a rolling manner, the resistance between the vibrating plate and the roller is ignored in the left and right directions, an adjusting mechanism is connected between the adjusting plate and the side plate, the adjusting mechanism comprises a telescopic rod fixedly connected to one end surface of the adjusting plate, which is far away from the vibrating plate, a threaded hole with an opening deviating from the adjusting plate is arranged in the telescopic rod, a lead screw is connected with the threaded hole in a threaded manner, one end of the side plate, which is far away from the adjusting plate, is fixedly connected with a feeding motor, the lead screw is in power connection with the feeding motor, the feeding motor is started, the telescopic rod is driven to slide through the lead screw, the adjusting plate is driven to slide and compress, the bottom plate is internally provided with a containing groove with an upward opening, a rotating wheel is rotationally arranged in the containing groove, the rear end of the rotating wheel is fixedly connected with a connecting rod, the upper end and the lower end of the connecting rod are symmetrically and fixedly connected with an impact head, the rotating wheel rotates and drives the connecting rod to rotate, and then the impact head impacts the vibrating plate and gives impact force to the vibrating plate, so that the vibrating plate starts to vibrate, the left end and the right end of the rotating wheel are connected with a manual mechanism, the manual mechanism comprises a connecting shaft fixedly connected with the left end and the right end of the rotating wheel, the connecting shaft is rotationally connected with the bottom plate, a spline groove is arranged in the bottom plate, a sliding wheel is slidably arranged in the spline groove, the sliding wheel is in spline connection with the spline groove, a connecting hole with an opening facing the spline groove is arranged in the connecting shaft, a connecting wheel is, a torsional spring is fixedly connected between the connecting wheel and the sliding wheel, one end of the connecting wheel, which is far away from the rotating wheel, is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected with the sliding wheel through a rotating bearing, one end of the rotating shaft, which is far away from the rotating wheel, extends out of the bottom plate and is fixedly connected with a manual wheel, when the connecting wheel is positioned in the spline groove, the manual wheel is manually rotated, and then the connecting wheel is driven to rotate through the rotating shaft, so that the torsional spring is twisted, at the moment, the manual wheel is pushed, and then the sliding wheel and the connecting wheel are driven to slide through the rotating shaft until the connecting wheel slides into the connecting hole and is connected with the connecting shaft, at the moment, the manual wheel is loosened, the connecting wheel is driven to rotate under the elastic force of the torsional spring, so that the connecting, before the connecting wheel slides into the connecting hole, the larger the number of the rotating turns of the manual wheel is, the larger the elasticity of the torsion spring is, the larger the impact force of the impact head which is driven by the rotating wheel and the connecting rod to impact the vibrating plate is, the impact force of the impact head impacting the vibrating plate is the excitation of the vibration of the vibrating plate, the upper end of the bottom plate is fixedly connected with two timing probes, when the vibrating plate does not vibrate, the timing probe is opposite to the vibrating plate, the timing probe records the time interval of two times of passing of the timing probe when the vibrating plate vibrates, namely, the timing probe monitors the vibration period of the vibrating plate, two rows of position sensors are fixedly connected on the upper end surface of the bottom plate, the position sensor monitors a change in position of the vibration plate when the vibration plate vibrates, that is, the position sensor monitors a change in attenuation of a vibration amplitude of the vibration plate. Beneficially, the inner wall of the through groove is internally and communicatively provided with a clamping groove, and the roller is clamped in the clamping groove, so that the roller is prevented from being separated from the vibrating plate when the vibrating plate vibrates.
Preferably, annular grooves are formed in the front end face and the rear end face of the roller, a connecting block is fixedly connected to one end of the supporting plate close to the roller, the connecting block is clamped into the annular grooves and can slide along the annular grooves, at the moment, the roller can roll relative to the vibrating plate, and the roller is further connected with the vibrating plate in a rolling mode.
Preferably, the front end face and the rear end face of the vibrating plate are internally and fixedly provided with a protective pad, and the impact head impacts on the protective pad to avoid damage caused by direct impact of the impact head on the vibrating plate.
The invention has the beneficial effects that: the invention directly monitors the vibration amplitude and the vibration period of the vibrating plate to further obtain the vibration rule of the vibrating plate during actual vibration, and can change the excitation and damping magnitude of the vibrating plate before vibration, thereby obtaining the relationship between the vibration rule of the vibrating plate and the excitation and damping magnitude.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic diagram of the overall structure of a mechanical vibration law monitoring device according to the present invention;
FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;
FIG. 3 is an enlarged schematic view of "B" of FIG. 1;
FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 2;
FIG. 5 is a schematic view of FIG. 3 taken in the direction "D";
fig. 6 is an enlarged schematic view of "E" of fig. 4.
Detailed Description
The invention will now be described in detail with reference to fig. 1-6, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a mechanical vibration law monitoring device, which comprises a bottom plate 11, wherein two side plates 17 are fixedly connected to the upper end of the bottom plate 11 in a front-back symmetrical manner, a vibration mechanism 100 is arranged between the side plates 17, the vibration mechanism 100 comprises a vibration plate 14 arranged between the side plates 17 in a sliding manner, a through groove 15 is arranged in the vibration plate 14 in a front-back through manner, two rollers 20 are arranged in the through groove 15 in a rolling manner, two support plates 19 are connected between the two rollers 20, an optical shaft 21 is connected in the rollers 20 in a sliding manner, the front end and the back end of the optical shaft 21 are fixedly connected to the side plates 17 at two sides, adjusting plates 18 are symmetrically arranged at the front side and the back side of the vibration plate 14, the optical shaft 21 is connected with the adjusting plates 18 in a sliding manner, damping springs 28 are fixedly connected between the adjusting plates 18, The roller 20 and the vibrating plate 14 vibrate reciprocally in the front-rear direction, because the roller 20 is connected with the vibrating plate 14 in a rolling manner, the resistance between the vibrating plate 14 and the roller 20 is negligible in the left-right direction, the adjusting plate 18 is connected with the adjusting mechanism 101 between the side plates 17, the adjusting mechanism 101 comprises a telescopic rod 25 fixedly connected to the adjusting plate 18 and far away from one end face of the vibrating plate 14, a threaded hole 26 with an opening deviating from the adjusting plate 18 is formed in the telescopic rod 25, a lead screw 27 is connected in the threaded hole 26 in a threaded manner, one end of the side plate 17 far away from the adjusting plate 18 is fixedly connected with a feeding motor 24, the lead screw 27 is connected with the feeding motor 24 in a power manner, the feeding motor 24 is started, the telescopic rod 25 is driven to slide through the lead screw 27, and the adjusting plate 18, and then adjust the elastic force of the damping spring 28 before the vibration plate 14 vibrates, a containing groove 29 with an upward opening is arranged in the bottom plate 11, a rotating wheel 13 is arranged in the containing groove 29 in a rotating manner, a connecting rod 31 is fixedly connected to the rear end of the rotating wheel 13, the upper end and the lower end of the connecting rod 31 are symmetrical and fixedly connected with an impact head 32, the rotating wheel 13 rotates and drives the connecting rod 31 to rotate, the impact head 32 impacts the vibration plate 14 and gives impact force to the vibration plate 14, so that the vibration plate 14 starts vibrating, the left end and the right end of the rotating wheel 13 are connected with a manual mechanism 102, the manual mechanism 102 comprises a connecting shaft 33 fixedly connected to the left end and the right end of the rotating wheel 13, the connecting shaft 33 is rotatably connected to the bottom plate 11, a spline groove 39 is arranged in the bottom plate 11, a sliding wheel 40 is arranged in the spline groove, be equipped with the opening in the connecting axle 33 and move towards the connecting hole 34 of spline groove 39, connecting hole 34 with the slip is equipped with fifth wheel 35 between the spline groove 39, when the fifth wheel 35 is located in the connecting hole 34 with the connecting axle 33 meshing is connected, fifth wheel 35 with torsional spring 41 has been linked firmly between the movable pulley 40, fifth wheel 35 keeps away from runner 13 one end has been linked firmly rotation axis 38, rotation axis 38 passes through rolling bearing and rotates to be connected in movable pulley 40, rotation axis 38 keeps away from runner 13 one end extends to outside the bottom plate 11 and has been linked firmly manual wheel 37, when the fifth wheel 35 is located in the spline groove 39, manual rotation the manual wheel 37, and then pass through rotation axis 38 drive fifth wheel 35 rotates, and then twists torsional spring 41, promote at this moment manual wheel 37, and then through rotation axis 38 drive movable pulley 40 with fifth wheel 35 slides, until the connecting wheel 35 slides into the connecting hole 34 and is connected with the connecting shaft 33, the manual wheel 37 is loosened, the connecting wheel 35 is driven to rotate under the action of the elastic force of the torsion spring 41, so as to drive the connecting shaft 33 to rotate, and further drive the rotating wheel 13 to rotate, before the connecting wheel 35 slides into the connecting hole 34, the number of rotation turns of the manual wheel 37 is increased, the larger the elastic force of the torsion spring 41 is, the larger the impact force of the impact head 32 impacting the vibrating plate 14 is driven by the rotating wheel 13 and the connecting rod 31, and the impact force of the impact head 32 impacting the vibrating plate 14 is the excitation size of the vibration of the vibrating plate 14, the upper end of the bottom plate 11 is fixedly connected with two timing probes 30, when the vibrating plate 14 does not vibrate, the timing probes 30 just face the vibrating plate 14, and the timing probes 30 record the time interval of two times of passing through the timing probes 30 when the vibrating plate 14 vibrates, that is, the timing probe 30 monitors the vibration cycle of the vibration plate 14, two rows of position sensors 36 are fixedly connected to the upper end surface of the base plate 11, and the position sensors 36 monitor the position change of the vibration plate 14 during vibration, that is, the position sensors 36 monitor the vibration amplitude attenuation change of the vibration plate 14.
Advantageously, a clamping groove 16 is formed in the inner wall of the through groove 15 in a communicating manner, and the roller 20 is clamped in the clamping groove 16, so that the roller 20 is prevented from being separated from the vibrating plate 14 when the vibrating plate 14 vibrates.
Advantageously, annular grooves 22 are formed in the front and rear end faces of the roller 20, a connecting block 42 is fixedly connected to one end of the supporting plate 19 close to the roller 20, the connecting block 42 is clamped in the annular groove 22, the connecting block 42 can slide along the annular groove 22, and the roller 20 can roll relative to the vibrating plate 14, so that the roller 20 and the vibrating plate 14 are in rolling connection.
Advantageously, a protection pad 23 is fixedly arranged in the front end face and the rear end face of the vibration plate 14, and the impact head 32 impacts on the protection pad 23, so that the impact head 32 is prevented from directly impacting the vibration plate 14 to cause damage.
The following describes in detail the use steps of a mechanical vibration law monitoring device in the present document with reference to fig. 1 to 6:
initially, the damping spring 28 is in a normal condition with the adjustment plate 18 away from the vibrating plate 14 with the timing probe 30 facing the vibrating plate 14 with the fifth wheel 35 in the splined recess 39 and the torsion spring 41 in a normal condition.
When the vibration plate 14 is used, the hand wheels 37 on two sides are manually rotated simultaneously, the connecting wheel 35 is driven to rotate through the rotating shaft 38, the torsion spring 41 is further twisted, the hand wheel 37 is pushed at the moment, the sliding wheel 40 is driven to slide with the connecting wheel 35 through the rotating shaft 38 until the connecting wheel 35 slides into the connecting hole 34 and is connected with the connecting shaft 33, the hand wheel 37 is loosened at the moment, the connecting wheel 35 is driven to rotate under the elastic force of the torsion spring 41, the connecting shaft 33 is driven to rotate, the rotating wheel 13 is driven to rotate, the impact head 32 is driven to impact on the protective pad 23 through the connecting rod 31, the vibration plate 14 is further driven to vibrate, and the vibration plate 14 vibrates and attenuates under the elastic force of the damping spring 28.
The vibration plate 14 is in rolling fit with the rollers 20 during the vibration process, so that the influence of resistance in the left-right direction on the vibration of the vibration plate 14 is reduced.
The timing probe 30 records the time interval between two passes of the timing probe 30 when the vibrating plate 14 vibrates, i.e. the timing probe 30 monitors the vibration period of the vibrating plate 14, and the position sensor 36 monitors the position change when the vibrating plate 14 vibrates, i.e. the position sensor 36 monitors the vibration amplitude attenuation change of the vibrating plate 14.
The elastic force of the torsion spring 41 can be changed by changing the number of turns of the manual wheel 37, so that the excitation size of the impact head 32 impacting the protection pad 23 and pushing the vibration plate 14 is changed; before the vibrating plate 14 vibrates, the feeding motor 24 is started, and then the telescopic rod 25 is driven to slide through the screw rod 27, and then the adjusting plate 18 is driven to slide, so that the elastic force of the damping spring 28 on the supporting plate 19 is changed, and the damping magnitude of the vibration of the vibrating plate 14 is changed.
The invention has the beneficial effects that: the invention directly monitors the vibration amplitude and the vibration period of the vibrating plate to further obtain the vibration rule of the vibrating plate during actual vibration, and can change the excitation and damping magnitude of the vibrating plate before vibration, thereby obtaining the relationship between the vibration rule of the vibrating plate and the excitation and damping magnitude.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (4)
1. The utility model provides a mechanical vibration law monitoring devices which characterized in that: the device comprises a bottom plate, wherein the upper end of the bottom plate is fixedly connected with two side plates in a front-back symmetrical manner; a vibration mechanism is arranged between the side plates and comprises a vibration plate which is arranged between the side plates in a sliding manner, a through groove is formed in the vibration plate in a front-back through manner, two rollers are arranged in the through groove in a rolling manner, two support plates are connected between the two rollers, an optical shaft is connected in the rollers in a sliding manner, the front end and the rear end of the optical shaft are fixedly connected to the side plates on the two sides, adjusting plates are symmetrically arranged on the front side and the rear side of the vibration plate, the optical shaft is connected with the adjusting plates in a sliding manner, and damping springs are fixedly connected between; an adjusting mechanism is connected between the adjusting plate and the side plate, the adjusting mechanism comprises a telescopic rod fixedly connected to one end face, away from the vibrating plate, of the adjusting plate, a threaded hole with an opening deviating from the adjusting plate is formed in the telescopic rod, a lead screw is connected to the thread hole in a threaded manner, one end, away from the adjusting plate, of the side plate is fixedly connected with a feeding motor, and the lead screw is in power connection with the feeding motor; a containing groove with an upward opening is formed in the bottom plate, a rotating wheel is rotatably arranged in the containing groove, the rear end of the rotating wheel is fixedly connected with a connecting rod, and the upper end and the lower end of the connecting rod are symmetrical and fixedly connected with an impact head; the left end and the right end of the rotating wheel are connected with manual mechanisms, each manual mechanism comprises a connecting shaft fixedly connected to the left end and the right end of the rotating wheel, the connecting shafts are rotatably connected to the bottom plate, a spline groove is formed in the bottom plate, a sliding wheel is arranged in the spline groove in a sliding mode, the sliding wheel is connected to the spline groove in a spline mode, a connecting hole with an opening facing the spline groove is formed in the connecting shaft, a connecting wheel is arranged between the connecting hole and the spline groove in a sliding mode, the connecting wheel is meshed with the connecting shaft when located in the connecting hole, a torsion spring is fixedly connected between the connecting wheel and the sliding wheel, one end, away from the rotating wheel, of the connecting wheel is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected to the sliding wheel through a rotating bearing; the upper end of the bottom plate is fixedly connected with two timing probes, and the upper end face of the bottom plate is fixedly connected with two rows of position sensors.
2. A mechanical vibration law monitoring device according to claim 1, wherein: the inner wall of the through groove is internally and communicatively provided with a clamping groove, and the roller is clamped in the clamping groove.
3. A mechanical vibration law monitoring device according to claim 1, wherein: the roller is characterized in that annular grooves are formed in the front end face and the rear end face of the roller, a connecting block is fixedly connected to one end, close to the roller, of the supporting plate, and the connecting block is clamped into the annular grooves.
4. A mechanical vibration law monitoring device according to claim 1, wherein: and protective pads are fixedly arranged in the front end face and the rear end face of the vibrating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149026.8A CN111103110B (en) | 2020-03-05 | 2020-03-05 | Mechanical vibration law monitoring devices |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149026.8A CN111103110B (en) | 2020-03-05 | 2020-03-05 | Mechanical vibration law monitoring devices |
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| CN111103110A CN111103110A (en) | 2020-05-05 |
| CN111103110B true CN111103110B (en) | 2020-08-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111665010B (en) * | 2020-06-16 | 2021-11-26 | 浙江广厦建设职业技术学院 | Civil structure antidetonation experimental apparatus |
| CN113686529A (en) * | 2021-10-26 | 2021-11-23 | 山东润龙轴承有限公司 | Acrylic plate vibration measurement system and device based on ultrasonic waves |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003072696A (en) * | 2001-09-06 | 2003-03-12 | Mitsubishi Heavy Ind Ltd | Rotary shaft spring support structure for microgravity rotating device |
| CN100538306C (en) * | 2006-07-12 | 2009-09-09 | 杭州奥普拓新技术有限公司 | Double-side bearing vibration detector |
| CN200962274Y (en) * | 2006-10-20 | 2007-10-17 | 秦树人 | Virtual test vibration and control integrated experimental device |
| US8813589B2 (en) * | 2010-11-22 | 2014-08-26 | Zhongsheng Tang | Eccentric moment stepless adjustable vibrating mechanism |
| CN102914363B (en) * | 2012-10-15 | 2014-01-29 | 哈尔滨工程大学 | Experimental device for quantitative analysis of influence rule of bending on shaft rotation vibration |
| CN206392811U (en) * | 2016-12-23 | 2017-08-11 | 燕山大学 | Dual-Servo Motor synchronously drives mould non-sinusoidal vibration device |
| CN206574343U (en) * | 2017-03-17 | 2017-10-20 | 张子礼 | Physics lesson spring vibration rule apparatus for demonstrating |
| CN207095813U (en) * | 2017-08-30 | 2018-03-13 | 重庆三峡学院 | A kind of gear vibration detection means |
| CN109211503B (en) * | 2018-09-13 | 2021-04-06 | 中车唐山机车车辆有限公司 | Dynamic testing device |
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Effective date of registration: 20200724 Address after: 201600 No.1 Workshop, block B, Lane 945, changta Road, Shihudang Town, Songjiang District, Shanghai Applicant after: Shanghai Yushang Precision Machinery Co., Ltd Address before: 325000 No.139, building 6, huichanghui, Shuixin north, Lucheng District, Wenzhou City, Zhejiang Province Applicant before: Wenzhou Lanyou Network Technology Co.,Ltd. |
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