CN110672291A - Vibration damping performance testing device - Google Patents
Vibration damping performance testing device Download PDFInfo
- Publication number
- CN110672291A CN110672291A CN201910923114.6A CN201910923114A CN110672291A CN 110672291 A CN110672291 A CN 110672291A CN 201910923114 A CN201910923114 A CN 201910923114A CN 110672291 A CN110672291 A CN 110672291A
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- vibration damping
- shaft
- damping performance
- control box
- temperature control
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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
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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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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a vibration damping performance testing device, which comprises a bracket; the bracket is provided with an excitation system; the vibration excitation system is connected with the temperature control box system through the lifting system. The excitation system comprises a stepping motor a; an output shaft of the stepping motor a is connected with one end of the shaft through a coupler; the shaft is horizontally arranged; the middle part of the shaft is connected with the cam key; the peripheral direction of the cam surface is provided with a chute; the sliding groove is provided with a pulley; the center shaft of the pulley is connected with the bottom end of the connecting rod through a bearing, and the top end of the connecting rod is connected with the lifting system. The shaft is arranged in a mode of comprising a bearing bracket vertically fixed on the bracket; both ends of the shaft are connected with the bearing bracket through a bearing a. The device for testing the vibration damping performance can determine the optimal working temperature of the metal rubber vibration damper, improve the vibration damping performance of the metal rubber vibration damper and prolong the service life of the vibration damper.
Description
Technical Field
The invention belongs to the technical field of performance testing devices for automobile damping materials, and particularly relates to a damping performance testing device.
Background
The shock absorber of traditional car is suitable for the environmental condition and is limited, and when the vehicle worked in comparatively abominable environment, the shock absorber just can not have an ideal damping effect, not only can reduce the life-span of shock absorber, probably leads to the safety problem when serious. The metal rubber is an elastic porous material which is manufactured by a spiral winding metal wire through a cold stamping process, not only has the characteristics of high elasticity and large damping of metal, but also retains the mechanical properties of the metal. Can work under extreme environment, do not fear high temperature and low temperature, and select different metals can also corrosion resisting environment, and do not have ageing possibility, these advantages make metal rubber shock absorber application environment scope widen, nevertheless because the inside wire turn looks friction of material when metal rubber shock absorber work, slide, a large amount of vibration energy can be consumed in extrusion etc. and can produce a large amount of heat, and can't dissipate immediately and lead to its temperature sharply to rise, the change of temperature can make metal rubber shock absorber damping nature also change, influence the riding comfort of vehicle.
Disclosure of Invention
The invention aims to provide a vibration damping performance testing device which can determine the optimal working temperature of a metal rubber vibration damper, improve the vibration damping performance of the metal rubber vibration damper and prolong the service life of the vibration damper.
The technical scheme adopted by the invention is that the vibration damping performance testing device comprises a bracket; the bracket is provided with an excitation system; the vibration excitation system is connected with the temperature control box system through the lifting system.
The invention is also characterized in that:
the excitation system comprises a stepping motor a; an output shaft of the stepping motor a is connected with one end of the shaft through a coupler; the shaft is horizontally arranged; the middle part of the shaft is connected with the cam key; the peripheral direction of the cam surface is provided with a chute; the sliding groove is provided with a pulley; the center shaft of the pulley is connected with the bottom end of the connecting rod through a bearing, and the top end of the connecting rod is connected with the lifting system.
The shaft is arranged in a mode of comprising a bearing bracket vertically fixed on the bracket; both ends of the shaft are connected with the bearing bracket through a bearing a.
The sleeve is sleeved on the shaft; one end of the sleeve is clamped on the inner ring of the bearing a and used for limiting; the other end of the sleeve is clamped with the cam to prevent the cam from moving axially.
One or two sleeves.
The lifting system comprises an I-shaped supporting plate which is horizontally arranged; the middle part of the supporting plate is fixedly connected with the top end of the connecting rod; two ends of the supporting plate are respectively and correspondingly fixedly connected with the sliding block a and the sliding block b; the slide block a is erected on the slide rail a; the sliding block b is erected on the sliding rail b; the sliding rails a and b are vertically fixed on the bracket; the supporting plate is connected with the temperature control box system.
The temperature control box system comprises a temperature control box fixedly connected with the supporting plate; the outer surface of the temperature control box is provided with a heat insulation layer; the inner side of the heat-insulating layer is provided with an electric heating wire; metal rubber is arranged in the temperature control box; a guide rod is vertically arranged in the middle of the metal rubber; the bottom end of the guide rod is fixedly connected with the support plate; the top end of the guide rod penetrates through a through hole formed in the pressing plate.
An acceleration sensor is arranged on the pressing plate; a speed sensor is arranged on the supporting plate; a temperature sensor is arranged in the temperature control box.
The acceleration sensor, the single-channel constant-current adapter and the analog-to-digital conversion module are electrically connected in sequence; the speed sensor, the transmitter and the analog-to-digital conversion module are electrically connected in sequence; the analog-to-digital conversion module, the controller, the driver and the stepping motor b are electrically connected in sequence; the controller, the relay and the electric heating wire are electrically connected in sequence; the temperature sensor, the MAX6675 and the controller are electrically connected in sequence; the controller, the chip and the upper computer are electrically connected in sequence.
The model of the acceleration sensor is CT1200 ICP/IEPE;
the model of the single-channel constant-current adapter is CT 5201;
the model of the analog-to-digital conversion module is PCF 8591;
the signal of the controller is a singlechip STC89C 52;
the drive model is TB 6600;
the model of the stepping motor b is 57HS 22;
the temperature sensor is a K-type thermocouple;
the model of the relay is SRD-05 VDC-SL-C.
The invention has the beneficial effects that:
(1) the invention can monitor and analyze the vibration damping performance of the metal rubber at different temperatures; the target temperature can be quickly reached through the temperature control box system, and the temperature control precision is improved; meanwhile, each part of the invention adopts modular design, and each part is simple to replace, convenient to maintain and low in cost;
(2) the invention utilizes the electric heating wire (heating resistance wire) in the temperature control box to control the working temperature of the metal rubber shock absorber, and the data acquisition module analyzes the change of the shock absorption performance influenced by different working temperatures of the metal rubber shock absorber, thereby determining the optimal working temperature of the metal rubber shock absorber, improving the shock absorption performance of the metal rubber shock absorber and prolonging the service life of the shock absorber.
Drawings
FIG. 1 is a front view of the vibration damping performance test apparatus of the present invention;
FIG. 2 is a side view of the vibration damping performance test apparatus of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at I;
FIG. 4 is an enlarged view of a portion of FIG. 1 at II;
FIG. 5 is an enlarged view of a portion of FIG. 1 at III;
FIG. 6 is an enlarged view of a portion of FIG. 1 at A-A;
fig. 7 is an electrical connection diagram of the data acquisition module in the vibration damping performance testing apparatus according to the present invention.
In the figure, 1, a support, 2, an excitation system, 3, a lifting system, 4, a temperature control box system, 5, a shaft, 6, a cam, 7, a sliding groove, 8, a pulley, 9, a connecting rod, 10, a stepping motor a, 11, a bearing support, 12, a bearing a, 13, a sleeve, 14, a support plate, 15, a sliding block a, 16, a sliding block b, 17, a sliding rail a, 18, a sliding rail b, 19, a temperature control box, 20, a heat insulation layer, 21, an electric heating wire, 22, metal rubber, 23, a guide rod, 24, a pressing plate, 25, a through hole, 26, an acceleration sensor, 27, a speed sensor, 28, a temperature sensor, 29, a single-channel constant-current adapter, 30, an analog-to-digital conversion module, 31, a transmitter, 32, a controller, 33, a driver, 34, a stepping motor b, 35, a relay, 36, MAX6675, 37, a chip.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the damping performance testing device of the present invention includes a bracket 1; the bracket 1 is provided with an excitation system 2; the vibration excitation system 2 is connected with the temperature control box system 4 through the lifting system 3.
The excitation system 2 comprises a stepping motor a 10; the output shaft of the stepping motor a10 is connected with one end of the shaft 5 through a coupler (as shown in fig. 5); the shaft 5 is horizontally arranged; the middle part of the shaft 5 is connected with a cam 6 in a key way; the surface of the cam 6 is circumferentially provided with a sliding chute 7; the sliding chute 7 is provided with a pulley 8; the central shaft of the pulley 8 is connected with the bottom end of a connecting rod 9 through a bearing, and the top end of the connecting rod 9 is connected with the lifting system 3.
As shown in fig. 3, the shaft 5 is arranged in a manner including a bearing bracket 11 vertically fixed to the bracket 1; both ends of the shaft 5 are connected to the bearing bracket 11 through bearings a 12.
A sleeve 13 sleeved on the shaft 5; one end of the sleeve 13 is clamped in the inner ring of the bearing a12 for limiting; the other end of the sleeve 13 engages the cam 6 to prevent axial movement of the cam 6 (as shown in figure 4). One or two of the sleeves 13.
The lifting system 3 comprises an I-shaped support plate 14 which is horizontally arranged; the middle part of the supporting plate 14 is fixedly connected with the top end of the connecting rod 9; two ends of the supporting plate 14 are respectively and correspondingly fixedly connected with the sliding block a15 and the sliding block b 16; the slide block a15 is erected on the slide rail a 17; the slide block b16 is erected on a slide rail b18 (shown in figure 6); the slide rail a17 and the slide rail b18 are both vertically fixed on the bracket 1; the support plate 14 is connected to the temperature controlled box system 4.
The temperature control box system 4 comprises a temperature control box 19 fixedly connected with the support plate 14; the outer surface of the temperature control box 19 is provided with a heat preservation layer 20; the inner side of the heat preservation layer 20 is provided with an electric heating wire 21; the temperature control box 19 is internally provided with metal rubber 22; a guide rod 23 is vertically arranged in the middle of the metal rubber 22; the bottom end of the guide rod 23 is fixedly connected with the support plate 14; the top end of the guide rod 23 passes through a through hole 25 opened on the pressing plate 24.
An acceleration sensor 26 is arranged on the pressure plate 24; a speed sensor 27 is arranged on the support plate 14; a temperature sensor 28 is provided in the temperature control box 19.
As shown in fig. 7, the acceleration sensor 26, the single-channel constant-current adapter 29, and the analog-to-digital conversion module 30 are electrically connected in sequence; the speed sensor 27, the transmitter 31 and the analog-to-digital conversion module 30 are electrically connected in sequence; the analog-to-digital conversion module 30, the controller 32, the driver 33 and the stepping motor b34 are electrically connected in sequence; the controller 32, the relay 35 and the heating wire 21 are electrically connected in sequence; the temperature sensor 28, the MAX667536 and the controller 32 are electrically connected in sequence; the controller 32, the chip 37 and the upper computer 38 are electrically connected in sequence.
The model of the acceleration sensor 26 is CT1200 ICP/IEPE;
the model of the single-channel constant-current adapter 29 is CT 5201;
the model of the analog-to-digital conversion module 30 is PCF 8591;
the signal of the controller 32 is a singlechip STC89C 52;
the drive 33 is of type TB 6600;
the model of the stepping motor b34 is 57HS 22;
the temperature sensor 28 is a type K thermocouple;
the relay 35 is of the type SRD-05 VDC-SL-C.
The speed sensor is used for monitoring the rotating speed of the motor; the acceleration sensor is used for monitoring the acceleration of the motor; the single-channel constant-current adapter CT5201 is used for supplying power to the acceleration sensor and amplifying and transmitting a signal of the acceleration sensor to the analog-to-digital conversion chip; the switching power supply converts 220V voltage into 24V direct-current voltage to supply power for the transmitter ZDB-1 and the driver TB 6600; the transmitter ZDB-1 monitors the running state of the motor and outputs 4-20A current to the analog-to-digital conversion module; the analog-to-digital conversion chip converts analog signals of the speed sensor, the acceleration sensor and the transmitter into digital signals and transmits the digital signals to the singlechip through a bus SDA; the singlechip P2.1 provides a clock signal of a bus for the analog-to-digital conversion module; the single-chip microcomputer P1.0, P1.1 and P1.2 are connected to the base electrodes of the three triodes, and signals are amplified through the triodes; output the amplified signal to driver TB 6600; controlling the rotating speed of the motor through P1.0; p1.1 controls the motor to rotate positively and negatively; p1.2 controls the motor to stop rotating. The P1.3 of the singlechip is connected with the base electrode of the triode and is used for controlling the operation of the heating resistance wire; the thermocouple is used for measuring the temperature of an environment or a motor and the like, measured data are transmitted to the MAX6675 through T + and T-, the single chip microcomputer sets P1.6 to be at a low level, and meanwhile, a pulse signal is input to the MAX6675 at P1.5, SO that temperature data can be read from SO of the MAX 6675; judging whether to turn off or turn on the operation of the resistance wire according to the data; all data can be transmitted to an upper computer through a CH340 chip and a USB; the upper computer can also send signals to the single chip microcomputer to control the operation of the heater or the motor.
The working process (principle) of the vibration damping performance testing device is as follows:
when the device is used, the stepping motor a10 of the excitation system 2 transmits torque to the cam 6 and drives the cam 6 to do circumferential regular motion; so that the i-shaped support plate 14 makes regular linear motion; the I-shaped supporting plate 14 and the temperature control box 19 are connected into a whole, so that the metal rubber 22 is driven to compress or stretch; the data acquisition module acquires actual working temperature, acceleration and speed signals of the metal rubber 22 through a temperature sensor 28 (a K-type thermocouple), an acceleration sensor 26 and a speed sensor 27; the collected actual temperature is compared with the study temperature, and the working time of the electric heating wire 21 is controlled according to the difference value, so that the temperature control box 19 can quickly reach the required study temperature. Meanwhile, the acquired acceleration and speed signals are used for analyzing the vibration damping performance of the metal rubber 22 at a specific research temperature through the upper computer 38, and the proper working temperature of the metal rubber 22 is determined, so that the vibration damping performance of the metal rubber 22 vibration damper is improved, and the service life of the metal rubber 22 vibration damper is prolonged.
The vibration damping performance testing device has the advantages that:
(1) the invention can monitor and analyze the vibration damping performance of the metal rubber at different temperatures; the target temperature can be quickly reached through the temperature control box system, and the temperature control precision is improved; meanwhile, each part of the invention adopts modular design, and each part is simple to replace, convenient to maintain and low in cost;
(2) the invention utilizes the electric heating wire (heating resistance wire) in the temperature control box to control the working temperature of the metal rubber shock absorber, and the data acquisition module analyzes the change of the shock absorption performance influenced by different working temperatures of the metal rubber shock absorber, thereby determining the optimal working temperature of the metal rubber shock absorber, improving the shock absorption performance of the metal rubber shock absorber and prolonging the service life of the shock absorber.
Claims (10)
1. A vibration damping performance testing device is characterized in that: comprises a bracket (1); the bracket (1) is provided with an excitation system (2); the excitation system (2) is connected with the temperature control box system (4) through the lifting system (3).
2. The vibration damping performance test apparatus according to claim 1, wherein: the excitation system (2) comprises a stepping motor a (10); an output shaft of the stepping motor a (10) is connected with one end of the shaft (5) through a coupler; the shaft (5) is horizontally arranged; the middle part of the shaft (5) is connected with the cam (6) in a key way; a sliding groove (7) is formed in the circumferential direction on the surface of the cam (6); the sliding chute (7) is provided with a pulley (8); the central shaft of the pulley (8) is connected with the bottom end of a connecting rod (9) through a bearing, and the top end of the connecting rod (9) is connected with a lifting system (3).
3. The vibration damping performance test apparatus according to claim 2, wherein: the shaft (5) is arranged in a mode of comprising a bearing support (11) vertically fixed on the support (1); both ends of the shaft (5) are connected with the bearing bracket (11) through bearings a (12).
4. The vibration damping performance test apparatus according to claim 3, wherein: the device also comprises a sleeve (13) sleeved on the shaft (5); one end of the sleeve (13) is clamped on the inner ring of the bearing a (12) for limiting; the other end of the sleeve (13) is clamped with the cam (6) to prevent the cam (6) from moving axially.
5. The vibration damping performance test apparatus according to claim 4, wherein: one or two of the sleeves (13) are provided.
6. The vibration damping performance test apparatus according to claim 2, wherein: the lifting system (3) comprises an I-shaped supporting plate (14) which is horizontally arranged; the middle part of the supporting plate (14) is fixedly connected with the top end of the connecting rod (9); two ends of the supporting plate (14) are respectively and correspondingly fixedly connected with the sliding block a (15) and the sliding block b (16); the slide block a (15) is erected on the slide rail a (17); the sliding block b (16) is erected on the sliding rail b (18); the sliding rail a (17) and the sliding rail b (18) are both vertically fixed on the bracket (1); the supporting plate (14) is connected with the temperature control box system (4).
7. The vibration damping performance test apparatus according to claim 6, wherein: the temperature control box system (4) comprises a temperature control box (19) fixedly connected with a support plate (14); the outer surface of the temperature control box (19) is provided with a heat insulation layer (20); the inner side of the heat-insulating layer (20) is provided with an electric heating wire (21); a metal rubber (22) is arranged in the temperature control box (19); a guide rod (23) is vertically arranged in the middle of the metal rubber (22); the bottom end of the guide rod (23) is fixedly connected with the support plate (14); the top end of the guide rod (23) passes through a through hole (25) formed in the pressure plate (24).
8. The vibration damping performance test apparatus according to claim 7, wherein: an acceleration sensor (26) is arranged on the pressure plate (24); a speed sensor (27) is arranged on the support plate (14); a temperature sensor (28) is arranged in the temperature control box (19).
9. The vibration damping performance test apparatus according to claim 8, wherein: the acceleration sensor (26), the single-channel constant-current adapter (29) and the analog-to-digital conversion module (30) are electrically connected in sequence; the speed sensor (27), the transmitter (31) and the analog-to-digital conversion module (30) are electrically connected in sequence; the analog-to-digital conversion module (30), the controller (32), the driver (33) and the stepping motor b (34) are electrically connected in sequence; the controller (32), the relay (35) and the electric heating wire (21) are electrically connected in sequence; the temperature sensor (28), the MAX6675(36) and the controller (32) are electrically connected in sequence; the controller (32), the chip (37) and the upper computer (38) are electrically connected in sequence.
10. The vibration damping performance test apparatus according to claim 9, wherein: the model of the acceleration sensor (26) is CT1200 ICP/IEPE;
the model of the single-channel constant-current adapter (29) is CT 5201;
the model of the analog-to-digital conversion module (30) is PCF 8591;
the signal of the controller (32) is a singlechip STC89C 52;
the driver (33) is of type TB 6600;
the model of the stepping motor b (34) is 57HS 22;
the temperature sensor (28) is a K-type thermocouple;
the type of the relay (35) is SRD-05 VDC-SL-C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923114.6A CN110672291A (en) | 2019-09-27 | 2019-09-27 | Vibration damping performance testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923114.6A CN110672291A (en) | 2019-09-27 | 2019-09-27 | Vibration damping performance testing device |
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| CN110672291A true CN110672291A (en) | 2020-01-10 |
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| CN201910923114.6A Pending CN110672291A (en) | 2019-09-27 | 2019-09-27 | Vibration damping performance testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829799A (en) * | 2020-07-16 | 2020-10-27 | 西南交通大学 | Device and method for testing low-temperature characteristics of train suspension element |
| CN113739852A (en) * | 2021-09-06 | 2021-12-03 | 青海大学 | Magnesium matrix alloy damping detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113739852A (en) * | 2021-09-06 | 2021-12-03 | 青海大学 | Magnesium matrix alloy damping detection device |
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Application publication date: 20200110 |
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