CN112229613B - Mechanical parameter testing device for vibration isolator - Google Patents
Mechanical parameter testing device for vibration isolator Download PDFInfo
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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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Abstract
The invention discloses a mechanical parameter testing device of a vibration isolator, and aims to provide a testing device with low testing cost and high testing efficiency. The invention is realized by the following technical scheme: the vibration isolator is connected with the vibration sensor through the counterweight mass block, and is electrically connected with a data acquisition instrument together with a displacement sensor penetrating through the counterweight mass block and contacting with the upper surface of the rectangular bearing seat, and a closed loop is formed by the data acquisition instrument, the vibration sensor and the displacement sensor to form a closed loop, so that a device for testing static and dynamic parameters of the vibration isolator is formed. The invention avoids the problem of rigidity coupling of the traditional four vibration isolators in combination test.
Description
Technical Field
The invention relates to a device for testing the static and dynamic performance parameters of a vibration isolator, which is mainly used for rapidly testing the mechanical parameters of the vibration isolator.
Background
Vibration phenomena are ubiquitous, and the influence of vibration effects on the structure is unavoidable. All kinds of equipment installed on a moving platform or a facility are always in a vibration environment unless vibration is utilized to realize a certain function, in general, the vibration is always harmful, dynamic deformation and dynamic stress are caused, the deformation and the stress can cause strength damage and fatigue damage of equipment structures and components, vibration isolators are usually required to be installed on the equipment to reduce vibration, influence and damage are reduced, and accordingly, statics and dynamic performance parameters of the vibration isolators need to be tested and mastered to select proper vibration isolators for different equipment objects and vibration environments. The vibration isolator is an elastic element which provides a connecting function between the machine equipment and the machine foundation, and can effectively reduce the vibration force transmitted to the machine foundation by the machine foundation and the vibration force transmitted to the machine equipment by the machine foundation in the motion process. The vibration isolator structure can effectively reduce high-frequency disturbance vibration energy transmission on the equipment body structure in the use process of various equipment devices. The common vibration control methods include vibration absorption, vibration isolation and damping vibration reduction. Existing vibration control includes the following two aspects: active control and passive control. The active control has the advantages of good control effect, high control efficiency and the like, but the requirements on the structure are higher, and not all the structures can meet the requirements of the active control. The passive control has the advantages of simple structure, no dependence on external energy, good vibration damping performance and the like, and is widely adopted. Vibration isolation is one method that is widely used in passive control. The good vibration isolation effect is the design of the performance of the vibration isolator. In vibration isolator design analysis and use, damping coefficient and rigidity coefficient are important parameters for analyzing the performance of the vibration isolator in vibration isolator design, and the test technology is an effective way for determining corresponding values. Therefore, for testing the damping coefficient of the vibration isolator, whether a test system is perfect or not and whether a test method is reasonable or not are important criteria for evaluating whether a test result is accurate or not. In the design and use process of the vibration isolator, equipment and machinery for testing damping coefficients generally comprise a universal material testing machine, a cam testing system, a high-frequency fatigue testing machine and the like. In the current stage, aiming at the phenomena of complex test flow and low test result precision of dynamic parameters such as damping coefficient, rigidity coefficient and the like in the using process of the vibration isolator in a specific test method, the accurate design and use of the performance of the vibration isolator are affected to a certain extent. In the conventional measuring and detecting process of the damping coefficient and the rigidity coefficient of the vibration isolator, the problems of complex technological process and insufficient standard test result exist in the test of the related dynamic parameters of the vibration isolator, and the adverse effects are caused on the dynamic parameter test result and the final application range of vibration isolator equipment. The traditional testing method for the dynamic parameters of the vibration isolator mainly adopts an experimental mechanical impedance curve fitting acquisition method to complete the testing work of damping coefficients and rigidity coefficients of the vibration isolator structure according to the internal vibration isolation principle in the using process of the vibration isolator structure, but the experimental mechanical impedance curve fitting acquisition method can only carry out single checking on damping and rigidity values in the dynamic parameters of the vibration isolator, and the situation that the damping and rigidity of viscous fluid can change along with the change of vibration frequency is not fully considered in the specific checking process, so that the vibration isolation performance of the vibration isolator is affected is not fully considered.
At present, the static and dynamic performance parameter tests of the vibration isolator are respectively realized by adopting different test instruments or test devices. The static performance parameter test of the traditional vibration isolator is usually implemented by adopting a material testing machine or a digital display force measuring system as shown in fig. 4, the vibration isolator 6 is placed on a base 26 of the material testing machine, a driving pressure arm 23 extrudes the vibration isolator to generate deformation, a data acquisition device 25 tests the deformation and the pressure through a displacement sensor 27 arranged on the base 26 and a force sensor 24 arranged on the arm 23, and secondary treatment is carried out on the test data to obtain the static performance parameters such as rated pressure, rated deformation, maximum pressure, maximum deformation and the like of the vibration isolator.
The dynamic performance parameter test of the conventional vibration isolator is generally implemented by adopting a test system as shown in fig. 5, the four vibration isolators 6 are fixedly connected with the counterweight 28 and the clamp 29 respectively, the clamp 29 is fixedly connected with the vibration table 2, the sensors 7 and 19 are respectively arranged on the counterweight 28 and the clamp 29 and are connected with the data acquisition instrument 16, when the vibration controller 21 generates a preset vibration/impact signal and inputs the preset vibration/impact signal to the vibration table 2, the clamp 29 is driven to drive the four vibration isolators 6 and the counterweight 28 to generate acceleration response, the data acquisition instrument 16 respectively acquires response data of two positions through the sensors 7 and 19, and dynamic performance parameters such as resonance frequency, vibration reduction efficiency, resonance amplification and the like of the vibration isolator are acquired through processing the response data.
Because different testing devices or systems are required for testing statics and dynamics performance, the problem of low testing efficiency is brought, different testers are familiar with different testing systems, instrument functions and performance parameters and have different operation accuracy degrees, and the problem of difficult control of process testing errors is also brought; the dynamic performance parameter testing system of the traditional vibration isolator needs to test four vibration isolators together, has the rigidity coupling risk of a plurality of vibration isolators, needs to carry out careful weight balancing and installation, and is time-consuming and labor-consuming; when the vibration isolator is required to be tested for dynamic performance parameters in a plurality of groups of pre-pressure states, a plurality of weight pieces must be manufactured, so that the test time and the real object cost are high.
In an embodiment known in the art, chinese patent application publication No. CN201811646049.9 discloses a vibration isolator testing device comprising a base, a testing assembly, a waveform generator and a main guide post, wherein the testing assembly is composed of a testing table, a vibration isolator and a force sensor, and an external load, the testing device can only test the dynamic performance parameters of the vibration isolator under drop impact conditions; the Chinese application patent publication Nos. CN201810822719.1 and CN201811086115.1 respectively disclose two automobile vibration isolator testing devices, including a workbench, a ground simulation device and a testing device containing vibration isolators, which are all based on the principle that an eccentric wheel or an eccentric shaft is used as a vibration excitation source to test the dynamic parameters of the automobile spring vibration isolator, and have the limitations of complex structure, less testing parameters, single testing purpose, low testing efficiency and the like; the Chinese patent application CNCN201911078284.5 discloses a vibration isolator testing device which comprises a fixed end, a linear actuator, a force sensor and a vibration isolator, is mainly used for testing an anti-snake-shaped vibration isolator of a railway vehicle system, and has the limitations of poor universality, single testing vibration condition and the like.
In order to meet the demands of static and dynamic multi-performance parameter tests, high-efficiency tests and the like of the general vibration isolator, the vibration isolator testing device disclosed in the patent application is difficult to meet.
Disclosure of Invention
Aiming at the defects of the static and dynamic multi-performance parameter test of the conventional vibration isolator, the invention provides the vibration isolator mechanical parameter test device which has the advantages of simple and feasible structure, strong practicability, few test instruments, low test cost, high test efficiency, high measurement precision and is simultaneously suitable for static and dynamic measurement.
The invention is realized by the following modes: the utility model provides a isolator mechanical parameter testing arrangement, includes a base 1 that is made the cantilever platform, installs respectively the attenuator 15 on base platform of base 1 cantilever platform lower both sides wall bottom, and the fixed shaking table 2 of seat in attenuator 15 groove chamber is located base 1 cantilever platform below and is fixed on shaking table 2 both sides board and connect the vertical movable clamp 14 of vibration control appearance 21, its characterized in that: the cantilever platform of the base 1 is provided with a force application screw 9 passing through a beam of the portal 4, the force application screw 9 is used for connecting a cylinder body 8, a first vibration sensor 7, a mass block 11, a vibration isolator 6, a rectangular bearing seat 5, a T-shaped stepped shaft 3 and a notch lock disc 22, the force application screw 9 is fixed between the beam of the portal 4 and the cantilever platform of the base 1 from top to bottom, the vibration table 2 is connected with the vibration isolator 6 through the top of a vibration cylinder matched with a vertical movable clamp 14, the vibration isolator 6 is connected with the first vibration sensor 7 through the T-shaped stepped shaft 3 and the rectangular bearing seat 5, the vibration isolator 6 is electrically connected with a data acquisition instrument 16 through a displacement sensor 10 penetrating through the weight block 11 and contacting the upper surface of the rectangular bearing seat 5, and a closed loop is formed through the data acquisition instrument 16 and the second vibration sensor 13, so that a complete vibration isolator static and dynamic parameter testing device is formed.
Compared with the prior testing device technology, the invention has the following beneficial effects:
simple and easy structure, strong practicability and few test instruments. The invention adopts a base 1 provided with a cantilever platform, dampers 15 respectively arranged on base platforms at the bottoms of two side walls below the cantilever platform of the base 1, a fixed vibrating table 2 arranged in a groove cavity of the dampers 15, a vertical movable clamp 14 positioned below the cantilever platform of the base 1 and fixed on two side plates of the vibrating table 2 and connected with a vibration controller 21, a force application screw 9 passing through a beam of a portal 4 is arranged on the cantilever platform of the base 1, a cylinder body 8, a first vibration sensor 7, a mass block 11, a connecting vibration isolator 6, a rectangular bearing seat 5, a T-shaped stepped shaft 3 and a notch locking disc 22 are arranged on the cantilever platform of the base 1, a second vibration sensor 13 connected with the vibrating table 2 through the top of a vibrating cylinder matched with the vertical movable clamp 14 is fixed between the beam of the portal 4 and the cantilever platform of the base 1 from top to bottom, and the invention has simple and easy structure, strong practicability, few test instruments and low manufacturing cost. The invention has low manufacturing cost
The test cost is low. The invention is connected with the vibration isolator 6 through the T-shaped stepped shaft 3 and the rectangular bearing seat 5, the vibration isolator 6 is connected with the first vibration sensor 7 through the counterweight mass block 11, the first vibration sensor 7 is electrically connected with the data acquisition instrument 16 through the counterweight mass block 11 and the displacement sensor 10 which is contacted with the upper surface of the rectangular bearing seat 5, and a closed loop is formed through the data acquisition instrument 16 and the second vibration sensor 13, so that a complete device for testing static and dynamic parameters of the vibration isolator is formed. The device realizes testing various statics and dynamic performance parameters of the universal vibration isolator on one device, fully utilizes mature instruments and equipment such as a vibrating table, a data acquisition instrument, a sensor and the like which are existing in each testing unit/manufacturer at present, and skillfully installs an auxiliary testing structure, realizes the various statics and dynamic performance parameters of the universal vibration isolator, does not need other testing instruments such as a material testing machine, obviously reduces personnel and instrument conversion cost in the testing process of the statics and dynamic performance parameters, and can obviously reduce the testing period.
The test efficiency is high. According to the invention, the first vibration sensor 7 and the displacement sensor 10 penetrating through the counterweight mass block 11 and contacting the upper surface of the rectangular bearing seat 5 are electrically connected with the data acquisition instrument 16, a closed loop is formed by the data acquisition instrument 16 and the second vibration sensor 13, the rigidity decoupling operation of the combined test of a plurality of vibration isolators is eliminated, a tester is not required to operate a plurality of test instruments, the statics and the dynamic performance parameters of the vibration isolators can be independently tested on one device, the dynamic response characteristic test of the vibration isolators under the action of a plurality of static pressure can be conveniently realized, the test operation difficulty is low, and the type of a plurality of test tasks can be satisfied. The problem of rigidity coupling caused by the combination test of the traditional four vibration isolators is avoided, the problem of error caused by insufficient switching operation experience of various instruments is solved, and the test operation difficulty is greatly reduced.
The vibration isolator testing device has the advantages of multiple types of adequate testing tasks, few related special testing instruments, high testing efficiency, low testing cost, capability of eliminating the problem of rigidity coupling caused by vibration isolator combination testing, easiness in controlling testing errors and the like. The high-efficiency and low-cost test requirements of various statics and dynamic performance parameters of the universal vibration isolator are met.
Drawings
Fig. 1 is a structural diagram of a mechanical parameter testing apparatus for a vibration isolator according to embodiment 1 of the present invention.
FIG. 2 is a state diagram of the dynamic performance parameter test of the non-precompression of FIG. 1.
Fig. 3 is a structural diagram of a mechanical parameter testing apparatus for vibration isolator according to example 2.
Fig. 4 is a diagram of a conventional isolator statics parameter testing apparatus.
Figure 5 is a diagram of a conventional isolator dynamic parameter testing apparatus.
In the figure: the device comprises a base, a vibrating table, a 3T-shaped stepped shaft, a 4 portal, a 5 rectangular bearing seat, a 6 vibration isolator, a 7 first vibration sensor, an 8 cylinder, a 9 force application screw, a 10 displacement sensor, an 11 counterweight mass block, a 12 fastening nut, a 13 second vibration sensor, a 14 vertical movable clamp, a 15 damper, a 16 data acquisition instrument, a 17 force sensor, a 18 counterweight block, a 19 vibration isolator, a 20L-shaped support, a 21 vibration control instrument, a 22 notch lock disc, a 23 moment arm, a 24 force sensor, a 25 acquisition device, a 26 base, a 27 displacement sensor, a 28 counterweight block and a 29 clamp.
For the purpose of further explanation and not limitation of the above-described implementations of the present invention, the following description gives the best embodiments with reference to the accompanying drawings so as to make the details and advantages of the present invention more apparent.
Detailed Description
See fig. 1 and 2. In the embodiments described below, a mechanical parameter testing apparatus for vibration isolator includes a base 1 with a cantilever platform, a fixed vibration table 2 seated in a cavity of the damper 15 through dampers 15 respectively installed on two sidewalls of the cantilever platform of the base 1 and a bottom base platform, and a vertically movable clamp 14 located below the cantilever platform of the base 1 and fixed on two sidewalls of the vibration table 2 and connected to a vibration controller 21, wherein: the cantilever platform of the base 1 is provided with a force application screw 9 passing through a beam of the portal 4, a cylinder body 8, a first vibration sensor 7, a mass block 11, a connecting vibration isolator 6, a rectangular bearing seat 5, a T-shaped stepped shaft 3 and a notch lock disc 22 are fixed between the beam of the portal 4 and the cantilever platform of the base 1 from top to bottom, a vibration table 2 is connected with the vibration isolator 6 through a vertically movable clamp 14, the vibration isolator 6 is connected with the first vibration sensor 7 through the T-shaped stepped shaft 3 and the rectangular bearing seat 5, the first vibration sensor 7 is electrically connected with a data acquisition instrument 16 through a displacement sensor 10 penetrating through the weight block 11 and contacting the upper surface of the rectangular bearing seat 5, and a closed loop is formed between the data acquisition instrument 16 and the second vibration sensor 13, so that a complete device for testing static and dynamic parameters of the vibration isolator is formed.
The cantilever platform is provided with a chute for fixing the portal 4, and the portal 4 is slidably fixed in the chute of the cantilever platform of the base 1 through two fastening nuts 12 below the cantilever platform; the threaded through hole on the beam of the portal 4 stretches into the guide blind hole of the cylinder body 8, a limiting structure for preventing the cylinder body 8 from falling off from the portal 4 is arranged between the cylinder body 8 and the portal 4, and the force application screw 9 is in threaded connection with the cylinder body 8 through the beam of the portal 4.
The first vibration sensor 7 is fixedly connected with the vibration isolator 6 through a counterweight block 11, the displacement sensor 10 parallel to the first vibration sensor 7 penetrates through the counterweight block 11 and then is in non-virtual contact with the upper end plane of the rectangular bearing seat 5 at the lower part, the vibration isolator 6 is fixedly arranged on the upper surface plane of the rectangular bearing seat 5, and the T-shaped stepped shaft 3 fixedly connected on the lower surface plane of the rectangular bearing seat 5 penetrates through the cantilever platform of the base 1.
The cantilever platform is provided with a guide groove, the shaft of the T-shaped stepped shaft 3 is provided with a guide rib, the circumferential rotation of the T-shaped stepped shaft 3 is completely limited by the cooperation of the guide groove and the guide rib, and the notch lock disc 22 is inserted between the T-shaped stepped shaft 3 and the upper surface plane of the cantilever platform of the base 1 to limit the vertical up-down movement of the T-shaped stepped shaft 3.
The vibration table 2 is fixed in the groove of the U-shaped cavity of the base 1 through the damper 15 and the vertical movable clamp 14, and the vertical movable clamp 14 is of a flexible structure in the axial direction of the vibration table 2 and of a rigid structure in the non-axial direction.
The portal 4 is provided with two guide posts and two guide holes of the cylinder body 8 in a sliding connection mode, the rectangular bearing seat 5 is fixedly connected with the T-shaped stepped shaft 3 and the vibration isolator 6 respectively, mounting holes fixedly connected with the T-shaped stepped shaft 3 and the vibration isolator 6 are formed in three surfaces of the rectangular bearing seat 5, and the X, Y, Z triaxial mechanical parameter test of the vibration isolator 6 is realized through axial replacement and installation of the rectangular bearing seat 5 on the end face of the T-shaped stepped shaft 3.
When in use, the force application screw 9 is rotated to drive the cylinder body 8 to move linearly downwards and squeeze the first vibration sensor 7 and the counterweight mass block 11, and static pressure is applied to the vibration isolator 6; then, the vibration table 2 is driven by the vibration controller 21 to provide vibration excitation to be applied to the T-shaped stepped shaft 3, the second vibration sensor 13 and the rectangular bearing seat 5, so that the vibration isolator 6 generates vibration response, signals such as static pressure, excitation force/acceleration input, vibration response and the like are collected through the first vibration sensor 7, the displacement sensor 10 and the second vibration sensor 13 and input into the data collecting instrument 16, and data processing is provided for the data collecting instrument 16, so that the statics and the dynamics performance parameters of the vibration isolator can be obtained.
During statics test, the notch lock plate 22 is in a locking state at first, the up-and-down motion of the T-shaped stepped shaft 3 is completely limited, then a knob of the force application screw 9 is twisted, the driving cylinder body 8 extrudes the first vibration sensor 7 and the counterweight mass block 11 to apply static pressure on the vibration isolator 6, the vibration isolator 6 is stressed to deform, the relative distance between the counterweight mass block 11 and the rectangular bearing seat 5 is changed, the data acquisition instrument 16 acquires vibration isolator stress and deformation data through the displacement sensor 10 and the force first vibration sensor 7, and vibration isolator statics parameters such as rated load, static deformation and the like can be obtained through post-processing of the data.
During dynamic test, firstly, the notch lock disk 22 is removed, so that the T-shaped stepped shaft 3 can move up and down, the fastening nut 12 is loosened, the portal 4 is moved to the other side far away from the T-shaped stepped shaft 3 along the guide groove on the cantilever platform of the base 1, and the fastening nut 12 is screwed; then, the vibration condition is input into the vibration controller 21 to output excitation current to drive the vibration table 2 to generate vibration force excitation, and the vibration force excitation is applied to the T-shaped stepped shaft 3, the second vibration sensor 13 and the rectangular bearing seat 5, so that the vibration isolator 6 generates vibration response, signals such as vibration excitation force input, vibration response and the like are collected through the first force vibration sensor 7 and the second acceleration vibration sensor 13 and input into the data collecting instrument 16, and test data output by the data collecting instrument 16 are processed, so that dynamic performance parameters such as resonance frequency, resonance amplification ratio, vibration damping efficiency and the like of the vibration isolator can be obtained.
See fig. 3. The difference between this embodiment and the above embodiment 1 is that the notch lock disk 22 is removed, the portal 4 with a portal structure is modified to be a reverse portal on the cantilever platform of the base 1, the force application screw 9 is screwed with the cylinder 8 through the reverse portal of the portal 4 to connect the displacement sensor 10, the newly added force sensor 17 is fixedly connected with the balancing weight 18, the cylinder 8 is fixedly connected with the L-shaped support 20, the newly added vibration isolator 19 installed on the L-shaped support 20 is not in virtual position contact with the force sensor 17, the first vibration sensor 7 is connected with the rectangular bearing seat 5 through the vibration isolator 6, the rectangular bearing seat 5 is connected with the second vibration sensor 13 through the cantilever platform penetrating into the base 1 through the T-shaped stepped shaft 3, and the data acquisition instrument 16 is connected between the displacement sensor 10, the force sensor 17, the first vibration sensor 7 and the second vibration sensor 13, thereby forming a device capable of realizing simultaneous testing of static and dynamic parameters of the vibration isolator.
The technical solution of the present invention is not limited to the above-described specific embodiments, but only the preferred embodiments of the present invention are described above. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the principle of the present invention, and all technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.
References to "upper," "lower," "top," "bottom," "inner," and the like in the description of the present invention are used for convenience in describing the orientation or positional relationship between elements shown in the drawings, and are not intended to indicate or imply that the apparatus or elements referred to must have a particular orientation, position, or operation in particular implementations, but are not to be construed as limiting the invention.
Claims (8)
1. The utility model provides a isolator mechanical parameter testing arrangement, includes base (1) that is made cantilever platform, just both sides wall and the bottom of base (1) all install attenuator (15), and fixed shaking table (2) of seat in the attenuator groove chamber are retrained in cantilever platform below of base (1) through vertical movable clamp (14), and vibration control appearance (21) are connected to shaking table (2), its characterized in that:
a force application screw rod (9) penetrating through a beam of the portal (4) is arranged on a cantilever platform of the base (1), the force application screw rod (9) is used for connecting a cylinder body (8), a first vibration sensor (7), a counterweight mass block (11), a vibration isolator (6), a rectangular bearing seat (5), a T-shaped stepped shaft (3) and a notch lock disc (22) from top to bottom, the cantilever platform of the portal (4) and the cantilever platform of the base (1), the vibration table (2) is connected with a data acquisition instrument (16) through a second vibration sensor (13) matched with the top of the vibration cylinder of the vertical movable clamp (14), the vibration isolator (6) is connected through the T-shaped stepped shaft (3) and the rectangular bearing seat (5), the counterweight mass block (11) provided with the first vibration sensor (7) is connected with the rectangular bearing seat (5) through the vibration isolator (6), and a displacement sensor (10), the first vibration sensor (7) and the second vibration sensor (13) are connected with the data acquisition instrument (16) from top to bottom, so that a one-side test closed loop is formed, and a dynamic parameter complete vibration isolator is formed;
the first vibration sensor (7) is fixedly connected with the vibration isolator (6) through the counterweight mass block (11), the displacement sensor (10) parallel to the first vibration sensor (7) penetrates through the counterweight mass block (11) and then is in non-virtual contact with the upper end plane of the lower rectangular bearing seat (5), the vibration isolator (6) is fixedly arranged on the upper surface plane of the rectangular bearing seat (5), and the T-shaped stepped shaft (3) fixedly connected to the lower surface plane of the rectangular bearing seat (5) penetrates through the cantilever platform of the base (1);
the cantilever platform is provided with a guide groove, the shaft of the T-shaped stepped shaft (3) is provided with a guide rib, the circumferential rotation of the T-shaped stepped shaft (3) is completely limited by the cooperation of the guide groove and the guide rib, and the notch lock disc (22) is inserted between the T-shaped stepped shaft (3) and the upper surface plane of the cantilever platform of the base (1) to limit the vertical up-down movement of the T-shaped stepped shaft (3).
2. The isolator mechanical parameter testing apparatus of claim 1, wherein: the cantilever platform is provided with a chute for fixing the portal (4), and the portal (4) is slidably fixed in the chute of the cantilever platform of the base (1) through two fastening nuts (12) below the cantilever platform; a threaded through hole on a beam of the portal (4) extends into a guide blind hole of the cylinder body (8), a limiting structure for preventing the cylinder body (8) from falling off from the portal (4) is arranged between the cylinder body (8) and the portal (4), and a force application screw (9) is in threaded connection with the cylinder body (8) through the beam of the portal (4).
3. The isolator mechanical parameter testing apparatus of claim 1, wherein: the vibrating table (2) is fixed in a groove of a U-shaped cavity of the base (1) through a damper (15) and a vertical movable clamp (14), and the vertical movable clamp (14) is of a flexible structure in the axial direction of the vibrating table (2) and of a rigid structure in the non-axial direction.
4. The isolator mechanical parameter testing apparatus of claim 1, wherein: the door frame (4) is provided with two guide posts and two guide holes of the cylinder body (8) in sliding connection, the rectangular bearing seat (5) is fixedly connected with the T-shaped stepped shaft (3) and the vibration isolator (6) respectively, the three faces of the rectangular bearing seat (5) are provided with mounting holes fixedly connected with the T-shaped stepped shaft (3) and the vibration isolator (6), and the rectangular bearing seat (5) is axially mounted on the end face of the T-shaped stepped shaft (3) in a replacement mode to realize X, Y, Z triaxial mechanical parameter test of the vibration isolator (6).
5. The isolator mechanical parameter testing apparatus of claim 1, wherein: when the vibration isolator is used, the force application screw rod (9) is rotated to drive the cylinder body (8) to linearly move downwards and squeeze the first vibration sensor (7) and the counterweight mass block (11), and static pressure is applied to the vibration isolator (6); then, the vibration table (2) is driven by the vibration control instrument (21) to provide vibration excitation to be applied to the T-shaped stepped shaft (3), the second vibration sensor (13) and the rectangular bearing seat (5), so that vibration acceleration, vibration speed, vibration displacement, static pressure and excitation force signals are generated on the vibration isolator (6), the vibration acceleration, vibration speed, vibration displacement, static pressure and excitation force signals are collected by the first vibration sensor (7), the displacement sensor (10) and the second vibration sensor (13) and are input into the data collection instrument (16), and data processing is provided for the data collection instrument (16), so that statics and dynamic performance parameters of the vibration isolator can be obtained.
6. The isolator mechanical parameter testing apparatus of claim 5, wherein: during statics test, the notch lock disc (22) is in a locking state, the T-shaped stepped shaft (3) is completely limited to move up and down, then a knob of the force application screw (9) is twisted, the cylinder body (8) is driven to extrude the first vibration sensor (7) and the counterweight block (11) to apply static pressure on the vibration isolator (6), the vibration isolator (6) is stressed to deform, the relative distance between the counterweight block (11) and the rectangular bearing seat (5) is changed, the data acquisition instrument (16) acquires the stress and deformation data of the vibration isolator through the displacement sensor (10) and the first vibration sensor (7), and rated load and static deformation statics parameters of the vibration isolator (6) are obtained through post-processing of the data.
7. The isolator mechanical parameter testing apparatus of claim 2, wherein: during dynamic test, the notch locking disc (22) is removed, so that the T-shaped stepped shaft (3) can move up and down, the fastening nut (12) is loosened, the portal (4) is moved to the other side far away from the T-shaped stepped shaft (3) along the guide groove on the cantilever platform of the base (1), and the fastening nut (12) is screwed; then, the vibration condition is input into a vibration control instrument (21) to output excitation current to drive a vibration table (2) to generate vibration force excitation, and the vibration force excitation is applied to a T-shaped stepped shaft (3), a second vibration sensor (13) and a rectangular bearing seat (5), so that a vibration isolator (6) generates vibration response, vibration excitation force input and vibration response signals are acquired through a first vibration sensor (7) and a second vibration sensor (13) and input into a data acquisition instrument (16), and test data output by the data acquisition instrument (16) are processed to obtain dynamic performance parameters of resonance frequency, resonance amplification factor and vibration reduction efficiency of the vibration isolator (6).
8. The isolator mechanical parameter testing apparatus of claim 1, wherein: get rid of breach lock dish (22), change portal (4) of door shape structure into the reverse portal on direct fixed mounting base (1) cantilever platform, force application screw rod (9) knob screw rod passes through the reverse portal spiro union cylinder body (8) of portal (4) and connects displacement sensor (10), fixed connection between newly-increased force transducer (17) and balancing weight (18), cylinder body (8) and L type support (20), newly-increased isolator (19) and force transducer (17) of installing on L type support (20) do not have virtual position contact, rectangular force bearing seat (5) are connected through isolator (6) to first vibration sensor (7), second vibration sensor (13) are connected through the cantilever platform of T shape step shaft (3) penetration base (1) to rectangular force bearing seat (5), data acquisition instrument (16) are connected between displacement sensor (10), force transducer (17), first vibration sensor (7) and second vibration sensor (13), the device that can realize isolator's mechanics and dynamic parameter test simultaneously.
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| CN113358465A (en) * | 2021-05-26 | 2021-09-07 | 中南大学 | Rigidity testing device for steel spring floating slab track vibration isolator |
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