Vibration test equipment and test method

Abstract

The invention relates to the technical field of road roller testing, and discloses vibration testing equipment, and a testing station table comprises an adaptive adjustment assembly which is arranged in a frame body and performs adaptive adjustment on the testing station table according to different road roller models; the two groups of load simulation debugging assemblies are arranged in the frame body, are used for supporting steel wheels of the road roller and are used for simulating different use road conditions of the road roller; and a limiting assembly. Vibration testing is directly carried out on the indoor debugging table, debugging can be carried out all year round without any weather influence, the appearance damage probability of indoor debugging machines is greatly reduced, due to process control programming, human factors are eliminated, one person can debug multiple machines, the debugging efficiency is improved by multiple times, the dynamic characteristics of real working conditions are restored, and the working efficiency is improved. And meanwhile, a fault simulation test is realized through the multidirectional damping system assembly.

Description

Technical Field

[0001] The invention relates to the technical field of road roller testing, in particular to a vibration testing device and a testing method. Background Art

[0002] As the core equipment of road construction, the reliability of the vibration system of the road roller directly affects the compaction effect and service life.

[0003] The factory debugging method currently used in the industry has the following problems:

[0004] 1. Dependence on site restrictions: Traditional debugging needs to be carried out outdoors, which is greatly affected by weather and ground conditions, has a long debugging cycle, and needs to be stopped in rainy days;

[0005] 2. Manual experience-driven: Debugging parameters are manually adjusted based on engineer experience, which results in poor consistency and easily leads to fluctuations in equipment performance;

[0006] 3. Incomplete testing: It is impossible to truly simulate the operating status of the roller in different usage scenarios;

[0007] 4. Safety risks: Mechanical structure abnormalities under high-frequency vibration, such as loose bolts and cracked welds, are difficult to expose during no-load operation and pose safety hazards after leaving the factory. Summary of the invention

[0008] Technical issues solved

[0009] In view of the deficiencies in the prior art, the present invention provides a vibration testing device and a testing method, which are mainly used to solve the limitations of site dependence: traditional debugging needs to be carried out in outdoor venues, which is greatly affected by weather and ground conditions, has a long debugging cycle, and requires shutdown in rainy days; manual experience is dominant: debugging parameters rely on the experience of engineers to manually adjust, with poor consistency, which can easily lead to fluctuations in equipment performance; it is impossible to truly simulate the operating status of the roller in different usage scenarios; safety risks: mechanical structure abnormalities under high-frequency vibration, such as loose bolts and cracked welds, are difficult to expose during no-load operation, and there are safety hazards after leaving the factory.

[0010] Technical Solution

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A vibration testing device comprises a factory building, wherein at least three test stations are arranged in the factory building, and rolling shutter doors for two-way access to the test stations are arranged on both sides of the factory building, and the test stations comprise a frame, which is arranged inside the floor of the factory building, and the test stations of the test stations are paved with patterned planks and flush with the floor, and the test stations also comprise:

[0013] An adaption and adjustment component is arranged inside the frame and adaptively adjusts the test station according to different roller models;

[0014] Two sets of load simulation and debugging components, both of which are arranged inside the frame and support the steel wheels of the roller, and simulate different road conditions for the roller;

[0015] A limit assembly, which is arranged above and around the test station and effectively limits the roller when it is tested inside the test station;

[0016] A multi-directional damping system component, wherein the multi-directional damping system can be detachably installed in a test station and implements a fault simulation test on the steel wheel of the roller;

[0017] The data acquisition system component can be detachably installed in the test station and collects various data during the test of the roller steel wheel.

[0018] Furthermore, the adaptation and adjustment component includes two groups of double guide rail frames, both groups of double guide rail frames are fixedly connected to the inside of the frame body, and two adjustment frames are slidably connected between the two groups of double guide rail frames through multiple groups of slides. Both sides of the two adjustment frames are fixedly connected with drive motors, and one end of the output shaft of the drive motor is keyed to a gear. Racks are fixedly connected inside the two groups of double guide rail frames, and the racks are meshed with the gears.

[0019] On the basis of the above scheme, the load simulation debugging component includes two nonlinear stiffness model rollers, both of which are rotatably connected to the adjustment frame through bearing seats, brake discs are fixed at the middle positions of the two nonlinear stiffness model rollers, and two brake calipers are fixedly connected to the top of the adjustment frame for braking the two brake discs respectively, and a support component for supporting the steel wheel of the roller is provided between the two nonlinear stiffness model rollers.

[0020] As a further solution of the present invention, the nonlinear stiffness model roller is a nonlinear stiffness model that supports multi-media simulation of asphalt, sand and gravel, and concrete based on Hertz contact theory.

[0021] Furthermore, the support assembly includes a plurality of support cylinders, and the plurality of support cylinders are respectively fixedly connected to the tops of two adjustment frames, and one end of the piston rods of the plurality of support cylinders located on the same side is fixedly connected to a support platform, and the two support platforms are respectively located between two nonlinear stiffness model rollers of two load simulation and debugging assemblies, and a plurality of laying grooves are opened on both sides of the top of the frame body, and a plurality of detachable laying plates are laid in the laying grooves for avoiding the nonlinear stiffness model rollers, and the detachable laying plates are steel plates, and both ends of the steel plates are fixedly connected with inserts that can be inserted into the laying grooves, and the top of the support platform is in the same horizontal plane as the nonlinear stiffness model roller, the detachable laying plates, and the patterned laying plates.

[0022] On the basis of the above scheme, the multi-directional damping system components include a vertical damping group, a lateral damping group and a longitudinal damping group, and the damping force is dynamically adjusted by a hydraulic servo valve. The vertical damping group, the lateral damping group and the longitudinal damping group can all be removably installed in the test station. The vertical damping group includes four groups of equidistantly arranged vertical hydraulic cylinders, which directly act on the platform below the steel wheel of the roller. The lateral damping group includes two groups of laterally arranged horizontal hydraulic cylinders, which are installed on the guide rails on both sides of the steel wheel to suppress lateral swing. The longitudinal damping group includes two groups of longitudinally arranged horizontal hydraulic cylinders, which are installed in front of the steel wheel to simulate travel resistance.

[0023] As a further solution of the present invention, the hydraulic servo valve is a high-frequency response proportional servo valve with a frequency response of ≥100 Hz, and the damping force of the multi-directional damping system component is dynamically calculated according to the material property model, satisfying the formula:

[0024] F=C·v n + K x

[0025] C is the viscous damping coefficient, v is the speed of the steel wheel, n is the nonlinear index, K is the equivalent stiffness coefficient, and x is the displacement.

[0026] Furthermore, the data acquisition system components include a six-dimensional force sensor, a laser displacement sensor, a pressure transmitter and an infrared thermal imager. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the resultant force in all directions in real time. The laser displacement sensor is installed on both sides of the test station. The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the inlet and outlet pressure difference of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller.

[0027] On the basis of the above scheme, the limiting assembly includes an upper bracket, which is fixedly connected to the top of the patterned deck, and two tracks are fixedly connected on both sides of the top of the upper bracket. A slide is slidably connected between the two tracks through a slide, and a flip frame is hinged on one side of the slide through a mounting seat. The end of the flip frame is rotatably connected to a pressing roller through a bearing, and two flip cylinders are hinged on one side of the slide, and one end of the flip cylinder piston rod is rotatably connected to the flip frame. Two mounting frames are fixedly connected on both sides of the top of the upper bracket, and a servo motor is fixedly connected at the four corners of the top of the upper bracket, and one end of the servo motor output shaft and the inside of the mounting frame are provided with a synchronous pulley, and one end of the servo motor output shaft is connected to the two synchronous pulleys inside the mounting frame through a synchronous belt transmission, and multiple synchronous belts are respectively fixed to the slides arranged on the tracks, and multiple fences are fixedly connected to the top of the patterned deck and around the test station, and a detachable steel chain is hung between adjacent fences, and the detachable steel chain forms an encirclement state of the test station.

[0028] A testing method for a vibration testing device comprises the following steps:

[0029] S1: First confirm the model of the roller, then start the drive motor. The drive motor rotates to drive the gear. Since the gear is meshed with the rack, the gear rotates and moves along the rack, so that the distance between the two adjustment frames is adjusted. At this time, the detachable deck is inserted into the paving groove through the insert block to complete the laying of the detachable deck. The detachable deck after laying can not only complete the walking support of the roller, but also can form an effective avoidance for the two sets of nonlinear stiffness model rollers, thereby completing the adaptation of the test bench;

[0030] S2: Since the top of the support platform is on the same horizontal plane as the nonlinear stiffness model roller, the detachable decking plate and the patterned decking plate, when the roller is driven to the test station, the steel wheel of the roller can be supported by the two support platforms until the steel wheel moves between the two nonlinear stiffness model rollers. The support platform is driven downward by shortening the support cylinder, so the roller and the steel wheel move downward at the same time until the steel wheel contacts the two nonlinear stiffness model rollers and is effectively supported by the two nonlinear stiffness model rollers. At this time, the steel wheel and the support platform are out of the support state, thereby completing the rapid adaptation of the steel wheel of the roller and the steel wheel of the roller falling into the test station;

[0031] S3: Then the data acquisition system components are installed. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the combined force in all directions in real time. The laser displacement sensor is installed on both sides of the test station. The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the inlet and outlet pressure difference of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller, so as to realize the accurate online measurement of various data of the roller during the vibration test.

[0032] S4: Then, the multi-directional damping system components are adapted and installed. Four groups of equidistantly arranged vertical hydraulic cylinders directly act on the platform below the roller drum to form a vertical damping group; two groups of transversely arranged horizontal hydraulic cylinders are installed on the guide rails on both sides of the roller to suppress lateral swing to form a transverse damping group; two groups of longitudinally arranged horizontal hydraulic cylinders are installed in front of the roller to simulate travel resistance to form a longitudinal damping group;

[0033] S5: Then, a no-load sweep frequency test is performed, and the self-test program is run under load. The vertical damping group reciprocates through the full stroke to verify the displacement-pressure linearity; the lateral damping group applies a step force to test the response time;

[0034] S6: After the no-load sweep frequency test is completed, load debugging is performed and a debugging mode is selected, such as the sand and gravel simulation mode. At this time, the nonlinear stiffness model roller supports asphalt medium simulation based on the Hertz contact theory;

[0035] S7: Then start the vibration motor of the road roller to perform a vibration test. At this time, the data acquisition system components are used to complete the accurate online measurement of various data during the vibration test;

[0036] S8: Then, fault simulation tests are carried out, such as bolt loosening simulation, which requires reducing pressure through the vertical damping group to simulate the failure of steel wheel fixation; eccentric block imbalance simulation, in which the lateral damping group applies periodic alternating force to simulate the phase deviation of the eccentric block; road roughness simulation, in which the longitudinal damping group outputs random fluctuation resistance, and the random fluctuation resistance needs to generate an excitation signal based on the ISO 8608 road spectrum to verify the alarm threshold of the roller system;

[0037] S9: After debugging is completed, a debugging report is generated and uploaded to the cloud database.

[0038] Beneficial Effects

[0039] Compared with the prior art, the present invention provides a vibration testing device and a testing method, which have the following beneficial effects:

[0040] 1. The present invention directly conducts vibration testing on an indoor debugging table, which is not affected by any weather and can be debugged all year round. The probability of damage to the appearance of the machine during indoor debugging is greatly reduced. Since the process control is programmed, human factors are eliminated, and one person can debug multiple machines, the debugging efficiency is improved many times, and the debugging time of a single machine can be reduced by more than 20%.

[0041] 2. The present invention restores the dynamic characteristics of real working conditions. For example, the nonlinear stiffness model roller is a nonlinear stiffness model based on Hertz contact theory to support multi-media simulation of asphalt, sand and gravel, and concrete, thereby completing the simulation restoration of different working conditions.

[0042] 3. The present invention adjusts the distance between the two adjustment frames by adapting the adjustment component, and the detachable decking after laying can not only provide walking support for the roller, but also form an effective avoidance for the two sets of nonlinear stiffness model rollers, thereby completing the adaptation of the test bench and completing the effective support of the roller steel wheel when it walks to the test station through the support component.

[0043] 4. The present invention realizes accurate online measurement of various data of the roller during vibration testing by installing data acquisition system components, such as a six-dimensional force sensor, a laser displacement sensor, a pressure transmitter and an infrared thermal imager.

[0044] 5. The present invention implements fault simulation testing through multi-directional damping system components, such as bolt loosening simulation; eccentric block imbalance simulation; road surface unevenness simulation, so as to verify the alarm threshold of the roller system.

[0045] 6. The present invention uses a limiting component to move the pressing roller to a specified position according to different roller models, and enables the pressing roller arranged at the end of the turning frame to press and limit the steel wheel of the roller from the upper side, thereby limiting the position of the roller and effectively preventing the roller from running away from the test station during the test. In addition, due to the provision of a fence and a detachable steel chain, double protection is formed for the roller during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A test flow diagram of a test method for a vibration test device proposed by the present invention;

[0047] Figure 2 A schematic diagram of the front three-dimensional structure of a vibration testing device proposed by the present invention;

[0048] Figure 3 A vibration testing device proposed by the present invention Figure 2 Schematic diagram of the internal structure;

[0049] Figure 4 A schematic diagram of the structure of a test station of a vibration test equipment proposed by the present invention;

[0050] Figure 5 A vibration testing device proposed by the present invention Figure 4 A schematic diagram of a local enlarged structure;

[0051] Figure 6 A vibration testing device proposed by the present invention Figure 5 Schematic diagram of the local explosion structure;

[0052] Figure 7 A schematic diagram of a detachable deck structure of a vibration testing device proposed by the present invention;

[0053] Figure 8 A schematic diagram of the structure of a support assembly of a vibration testing device proposed by the present invention;

[0054] Fig. 9 This is a schematic structural diagram of a limit assembly of a vibration testing device proposed by the present invention.

[0055] In the figure: 1. Factory building; 2. Test station; 3. Patterned deck; 4. Limiting assembly; 401. Upper bracket; 402. Turning cylinder; 403. Turning frame; 404. Pressing roller; 405. Mounting seat; 406. Slide; 407. Mounting frame; 408. Track; 409. Synchronous belt; 410. Synchronous pulley; 411. Servo motor; 5. Fence; 6. Removable steel chain; 7. Frame; 8. Removable deck ;801, insert; 802, steel plate; 9, laying groove; 10, load simulation debugging component; 1001, nonlinear stiffness model roller; 1002, brake disc; 1003, adjustment frame; 1004, brake caliper; 11, support component; 1101, support platform; 1102, support cylinder; 12, adaptation and adjustment component; 1201, drive motor; 1202, gear; 1203, rack; 1204, double guide frame. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] Reference Figure 1-Figure 9 A vibration test device includes a plant 1, at least three test stations 2 are arranged in the plant 1, and rolling doors for two-way access to the test stations 2 are arranged on both sides of the plant 1. The test stations 2 include a frame 7, and the frame 7 is arranged inside the floor of the plant 1. The test stations of the test stations 2 are paved with patterned boards 3 and are flush with the ground. The test stations 2 also include:

[0060] The adapting and adjusting component 12 is arranged inside the frame 7 and is used to adaptively adjust the test station 2 according to different roller models;

[0061] Two sets of load simulation debugging components 10, both of which are arranged inside the frame 7 and support the steel wheels of the roller, and simulate different road conditions for the roller;

[0062] The limit assembly 4 is arranged above and around the test station 2 and effectively limits the roller when it is tested inside the test station 2;

[0063] A multi-directional damping system component, the multi-directional damping system can be detachably installed in the test station 2, and a fault simulation test is performed on the steel wheel of the roller;

[0064] The data acquisition system component can be detachably installed in the test station 2 and collects various data during the test of the roller steel wheel.

[0065] The adapting and adjusting assembly 12 in the present invention comprises two groups of double guide rail frames 1204, both of which are fixed inside the frame body 7 by bolts, and two adjusting frames 1003 are slidably connected between the two groups of double guide rail frames 1204 by multiple groups of slides, and driving motors 1201 are fixed on both sides of the two adjusting frames 1003 by bolts, and one end of the output shaft of the driving motor 1201 is keyed to a gear 1202, and racks 1203 are fixed inside the two groups of double guide rail frames 1204 by bolts, and the racks 1203 are meshed with the gears 1202, and by starting the driving motor 1201, the driving motor 1201 rotates to drive the gears 1202 to rotate, and since the gears 1202 are meshed with the racks 1203, the gears 1202 rotate and move along the racks 1203 at the same time, so that the distance between the two adjusting frames 1003 is adjusted, thereby adapting to different types of rollers.

[0066] The load simulation debugging component 10 in the present invention includes two nonlinear stiffness model rollers 1001, and the two nonlinear stiffness model rollers 1001 are rotatably connected to the adjustment frame 1003 through the bearing seat. The middle position of the two nonlinear stiffness model rollers 1001 is fixed with a brake disc 1002, and the top of the adjustment frame 1003 is fixed with two brake calipers 1004 for braking the two brake discs 1002 respectively by bolts. A support component 11 for supporting the steel wheel of the road roller is provided between the two nonlinear stiffness model rollers 1001. The nonlinear stiffness model rollers 1001 are nonlinear stiffness models that support multi-media simulation of asphalt, gravel, and concrete based on the Hertz contact theory;

[0067] Hertz contact theory describes the relationship between stress and deformation of two elastic bodies in the contact area.

[0068] The relationship between F and contact deformation δ is:

[0069] F=kδ 3 / 2

[0070] Where k is the contact stiffness coefficient, which depends on the material properties and geometry;

[0071] For multi-media (such as asphalt, gravel, concrete), the nonlinear stiffness model can be expressed as:

[0072] F = k n δ n

[0073] Among them, k n is the nonlinear stiffness coefficient, n is the nonlinear index (n = 3 / 2 in Hertz theory)

[0074] Asphalt: elastic modulus E 1 , Poisson's ratio ν 1 ;

[0075] Sand and gravel: elastic modulus E 1 , Poisson's ratio ν 1 ;

[0076] Concrete: elastic modulus E 1 , Poisson's ratio ν 1 ;

[0077] For the contact between two media, the contact stiffness coefficient k can be calculated by the equivalent elastic modulus E * and the equivalent radius R * calculate:

[0078]

[0079] In numerical simulation, the nonlinear stiffness model can be implemented by the following steps:

[0080] 1. Contact detection: determine the contact area and deformation δ;

[0081] 2. Contact force calculation: according to F = k n δ n Calculate contact forces;

[0082] 3. Force and displacement update: Apply contact force to the contact body, update displacement and deformation,

[0083] At the same time, the model can be verified through experimental data (such as indentation test) and the parameters can be adjusted to improve the accuracy.

[0084] The support assembly 11 in the present invention includes a plurality of support cylinders 1102, and the plurality of support cylinders 1102 are respectively fixed to the tops of the two adjustment frames 1003 by bolts, and one end of the piston rods of the plurality of support cylinders 1102 located on the same side is fixed with a support platform 1101 by bolts, and the two support platforms 1101 are respectively located between the two nonlinear stiffness model rollers 1001 of the two load simulation debugging components 10, and a plurality of laying grooves 9 are opened on both sides of the top of the frame 7, and a plurality of detachable laying plates 8 for avoiding the nonlinear stiffness model rollers 1001 are laid in the laying grooves 9, and the detachable laying plates 8 are steel plates 802, and both ends of the steel plates 802 are welded with inserts 801 that can be inserted into the laying grooves 9. The top of 01 is on the same horizontal plane as the nonlinear stiffness model roller 1001, the detachable deck 8 and the patterned deck 3. Therefore, when the roller is driven to the test station 2, the steel wheel of the roller can be supported by the two support platforms 1101 until the steel wheel moves between the two nonlinear stiffness model rollers 1001. The support cylinder 1102 is shortened to drive the support platform 1101 to move downward. Therefore, the roller and the steel wheel move downward at the same time until the steel wheel contacts the two nonlinear stiffness model rollers 1001 and is effectively supported by the two nonlinear stiffness model rollers 1001. At this time, the steel wheel and the support platform 1101 are out of the support state, thereby completing the rapid adaptation of the steel wheel of the roller and the steel wheel of the roller falling into the test station.

[0085] The multi-directional damping system components in the present invention include a vertical damping group, a transverse damping group and a longitudinal damping group, and the damping force is dynamically adjusted by a hydraulic servo valve. The vertical damping group, the transverse damping group and the longitudinal damping group can be detachably installed in the test station 2. The vertical damping group includes four groups of vertical hydraulic cylinders arranged at equal distances, which directly act on the platform below the steel wheel of the roller. The transverse damping group includes two groups of horizontal hydraulic cylinders arranged laterally, which are installed on the guide rails on both sides of the steel wheel to suppress lateral swing. The longitudinal damping group includes two groups of horizontal hydraulic cylinders arranged longitudinally, which are installed in front of the steel wheel to simulate the travel resistance. The hydraulic servo valve is a high-frequency response proportional servo valve with a frequency response of ≥100Hz, and the damping force of the multi-directional damping system components is dynamically calculated according to the material property model, satisfying the formula:

[0086] F=C·v n + K x

[0087] C is the viscous damping coefficient, v is the speed of the steel wheel, n is the nonlinear index, K is the equivalent stiffness coefficient, and x is the displacement.

[0088] During fault simulation testing, such as bolt loosening simulation, it is necessary to reduce the pressure through the vertical damping group to simulate the failure of steel wheel fixation; for eccentric block imbalance simulation, the lateral damping group applies periodic alternating force to simulate the phase deviation of the eccentric block; for road roughness simulation, the random fluctuation resistance is output through the longitudinal damping group, and the random fluctuation resistance needs to generate an excitation signal based on the ISO 8608 road surface spectrum.

[0089] The data acquisition system components in the present invention include a six-dimensional force sensor, a laser displacement sensor, a pressure transmitter and an infrared thermal imager. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the combined force in all directions in real time. The laser displacement sensor is installed on both sides of the test station 2. The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the inlet and outlet pressure difference of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller, thereby realizing accurate online measurement of various data of the roller during vibration testing.

[0090] The limit assembly 4 in the present invention includes an upper bracket 401, which is fixed to the top of the patterned deck 3 by bolts. Two rails 408 are fixed to the top of the upper bracket 401 by bolts on both sides. A slide 406 is slidably connected between the two rails 408 via a slide table. A flip frame 403 is hingedly connected to one side of the slide 406 via a mounting seat 405. The end of the flip frame 403 is rotatably connected to a pressing roller 404 via a bearing. Two flip cylinders 402 are hingedly connected to one side of the slide 406, and the flip cylinder 406 is hingedly connected to the other side of the slide 406. One end of the piston rod is rotatably connected to the flip frame 403, two mounting frames 407 are fixed to the top of the upper bracket 401 by bolts, and servo motors 411 are fixed to the four corners of the top of the upper bracket 401 by bolts, and one end of the output shaft of the servo motor 411 and the inside of the mounting frame 407 are provided with synchronous pulleys 410, one end of the output shaft of the servo motor 411 and the two synchronous pulleys 410 inside the mounting frame 407 are connected by synchronous belts 409, and multiple synchronous belts 409 are respectively connected to the track The slides set on 408 are fixed, and multiple fences 5 are fixed on the top of the patterned deck 3 and around the test station 2 by bolts. A detachable steel chain 6 is hung between adjacent fences 5, and the detachable steel chain 6 forms a surrounding state of the test station 2. By starting the servo motor 411, the servo motor 411 rotates through the synchronous belt 409 to make the two synchronous pulleys 410 rotate synchronously. At this time, the slide 406 can move along the track 408 through the slide fixed with the synchronous belt 409, so that the pressing roller 4 04 Move to the designated position according to different roller models, and then start the flip cylinder 402. The flip cylinder 402 extends to drive the flip frame 403 to rotate around the mounting seat 405, and the pressing roller 404 set at the end of the flip frame 403 presses the steel wheel of the roller from the upper side to limit the position of the roller, thereby limiting the position of the roller and effectively preventing the roller from running out of the test station during the test. In addition, due to the provision of the fence 5 and the detachable steel chain 6, double protection is formed for the roller during the test.

[0091] A testing method for a vibration testing device comprises the following steps:

[0092] S1: First confirm the model of the roller, then start the drive motor 1201, the drive motor 1201 rotates to drive the gear 1202 to rotate, because the gear 1202 is meshed with the rack 1203, therefore, the gear 1202 rotates and moves along the rack 1203, so that the distance between the two adjustment frames 1003 is adjusted, at this time, the detachable deck 8 is inserted into the laying groove 9 through the insert 801, so as to complete the laying of the detachable deck 8, and the detachable deck 8 after laying can not only complete the walking support of the roller, but also can form an effective avoidance for the two sets of nonlinear stiffness model rollers 1001, so as to complete the adaptation of the test bench;

[0093] S2: Since the top of the support platform 1101 is on the same horizontal plane as the nonlinear stiffness model roller 1001, the detachable deck 8, and the patterned deck 3, when the road roller is driven to the test station 2, the steel wheel of the road roller can be supported by the two support platforms 1101 until the steel wheel moves between the two nonlinear stiffness model rollers 1001, and the support cylinder 1102 is shortened to drive the support platform 1101 to move downward, so the road roller and the steel wheel move downward at the same time until the steel wheel contacts the two nonlinear stiffness model rollers 1001 and is effectively supported by the two nonlinear stiffness model rollers 1001, at which time the steel wheel and the support platform 1101 are out of the support state, thereby completing the rapid adaptation of the steel wheel of the road roller and the steel wheel of the road roller falling into the test station;

[0094] S3: Then the data acquisition system components are installed. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the combined force in all directions in real time. The laser displacement sensor is installed on both sides of the test station 2. The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the inlet and outlet pressure difference of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller, so as to realize the accurate online measurement of various data of the roller during the vibration test.

[0095] S4: Then, the multi-directional damping system components are adapted and installed. Four groups of equidistantly arranged vertical hydraulic cylinders directly act on the platform below the roller drum to form a vertical damping group; two groups of transversely arranged horizontal hydraulic cylinders are installed on the guide rails on both sides of the roller to suppress lateral swing to form a transverse damping group; two groups of longitudinally arranged horizontal hydraulic cylinders are installed in front of the roller to simulate travel resistance to form a longitudinal damping group;

[0096] S5: Then, a no-load sweep frequency test is performed, and the self-test program is run under load. The vertical damping group reciprocates through the full stroke to verify the displacement-pressure linearity; the lateral damping group applies a step force to test the response time;

[0097] S6: After the no-load sweep frequency test is completed, load debugging is performed and a debugging mode is selected, such as a sand and gravel simulation mode. At this time, the nonlinear stiffness model roller 1001 supports asphalt medium simulation based on the Hertz contact theory;

[0098] S7: Then start the vibration motor of the road roller to perform a vibration test. At this time, the data acquisition system components are used to complete the accurate online measurement of various data during the vibration test;

[0099] S8: Then, fault simulation tests are carried out, such as bolt loosening simulation, which requires reducing pressure through the vertical damping group to simulate the failure of steel wheel fixation; eccentric block imbalance simulation, in which the lateral damping group applies periodic alternating force to simulate the phase deviation of the eccentric block; road roughness simulation, in which the longitudinal damping group outputs random fluctuation resistance, and the random fluctuation resistance needs to generate an excitation signal based on the ISO 8608 road spectrum to verify the alarm threshold of the roller system;

[0100] S9: After debugging is completed, a debugging report is generated and uploaded to the cloud database.

[0101] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A vibration testing device, comprising a plant (1), wherein at least three test stations (2) are arranged in the plant (1), and rolling shutter doors for two-way access to the test stations (2) are arranged on both sides of the plant (1), characterized in that: The test station platform (2) comprises a frame (7), the frame (7) is arranged inside the floor of the factory building (1), the test station of the test station platform (2) is paved with a patterned floor plate (3) and is flush with the floor, and the test station platform (2) also comprises: An adaption adjustment component (12), the adaption adjustment component (12) being arranged inside the frame (7) and adaptively adjusting the test station (2) according to different road roller models; Two sets of load simulation debugging components (10), the two sets of load simulation debugging components (10) are both arranged inside the frame (7) and support the steel wheels of the roller, and simulate different road conditions for the roller; A limit assembly (4), wherein the limit assembly (4) is arranged above and around the test station (2) and effectively limits the position of the roller when it is being tested inside the test station (2); A multi-directional damping system component, wherein the multi-directional damping system can be detachably installed in a test station (2) and performs a fault simulation test on a steel wheel of a road roller; A data acquisition system component, wherein the data acquisition system can be detachably installed in a test station (2) and collects various data during the test of the steel wheel of the road roller.

2. A vibration testing device according to claim 1, characterized in that: The adapting and adjusting component (12) comprises two groups of double guide rail frames (1204), the two groups of double guide rail frames (1204) are fixedly connected inside the frame body (7), two adjustment frames (1003) are slidably connected between the two groups of double guide rail frames (1204) via a plurality of groups of slides, both sides of the two adjustment frames (1003) are fixedly connected with a driving motor (1201), one end of the output shaft of the driving motor (1201) is key-connected with a gear (1202), and racks (1203) are fixedly connected inside the two groups of double guide rail frames (1204), and the racks (1203) are meshed with the gears (1202).

3. A vibration testing device according to claim 2, characterized in that: The load simulation debugging component (10) comprises two nonlinear stiffness model rollers (1001), the two nonlinear stiffness model rollers (1001) are rotatably connected to an adjustment frame (1003) via a bearing seat, a brake disc (1002) is fixed at the middle position of the two nonlinear stiffness model rollers (1001), two brake calipers (1004) for braking the two brake discs (1002) are fixedly connected to the top of the adjustment frame (1003), and a support component (11) for supporting the steel wheel of the roller is provided between the two nonlinear stiffness model rollers (1001).

4. A vibration testing device according to claim 3, characterized in that: The nonlinear stiffness model roller (1001) is a nonlinear stiffness model that supports multi-media simulation of asphalt, gravel and concrete based on Hertz contact theory.

5. A vibration testing device according to claim 3, characterized in that: The support assembly (11) comprises a plurality of support cylinders (1102), wherein the plurality of support cylinders (1102) are respectively fixedly connected to the tops of two adjustment frames (1003), one end of the piston rods of the plurality of support cylinders (1102) located on the same side is fixedly connected to a support platform (1101), and the two support platforms (1101) are respectively located between two nonlinear stiffness model rollers (1001) of two load simulation debugging assemblies (10), and the top of the frame (7) A plurality of laying grooves (9) are provided on both sides, and a plurality of detachable laying plates (8) for avoiding the nonlinear stiffness model roller (1001) are laid in the laying grooves (9), and the detachable laying plates (8) are steel plates (802), and both ends of the steel plates (802) are fixedly connected with inserts (801) that can be inserted into the laying grooves (9), and the top of the support platform (1101) is in the same horizontal plane as the nonlinear stiffness model roller (1001), the detachable laying plates (8), and the patterned laying plates (3).

6. A vibration testing device according to claim 1, characterized in that: The multi-directional damping system component comprises a vertical damping group, a transverse damping group and a longitudinal damping group, and the damping force is dynamically adjusted by a hydraulic servo valve. The vertical damping group, the transverse damping group and the longitudinal damping group are all detachably installed in a test station (2). The vertical damping group comprises four groups of vertical hydraulic cylinders arranged at equal distances, which directly act on the platform below the steel wheel of the roller. The transverse damping group comprises two groups of transversely arranged horizontal hydraulic cylinders, which are installed on the guide rails on both sides of the steel wheel to suppress lateral swing. The longitudinal damping group comprises two groups of longitudinally arranged horizontal hydraulic cylinders, which are installed in front of the steel wheel to simulate travel resistance.

7. A vibration testing device according to claim 6, characterized in that: The hydraulic servo valve is a high-frequency response proportional servo valve with a frequency response of ≥100 Hz, and the damping force of the multi-directional damping system component is dynamically calculated according to the material property model, satisfying the formula: F=C·v n +K· x C is the viscous damping coefficient, v is the speed of the steel wheel, n is the nonlinear index, K is the equivalent stiffness coefficient, and x is the displacement.

8. A vibration testing device according to claim 1, characterized in that: The data acquisition system component comprises a six-dimensional force sensor, a laser displacement sensor, a pressure transmitter and an infrared thermal imager. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the resultant force in each direction in real time. The laser displacement sensor is installed on both sides of the test station (2). The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the inlet and outlet pressure difference of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller.

9. A vibration testing device according to claim 1, characterized in that: The limiting assembly (4) comprises an upper bracket (401), the upper bracket (401) is fixedly connected to the top of the patterned deck (3), two rails (408) are fixedly connected to both sides of the top of the upper bracket (401), a slide (406) is slidably connected between the two rails (408) via a slide, one side of the slide (406) is hinged with a flip frame (403) via a mounting seat (405), the end of the flip frame (403) is rotatably connected to a pressing roller (404) via a bearing, one side of the slide (406) is hinged with two flip cylinders (402), and one end of the piston rod of the flip cylinder (402) is rotatably connected to the flip frame (403), and the two mounting frames (406) are fixedly connected to both sides of the top of the upper bracket (401). 7), a servo motor (411) is fixedly connected to the four corners of the top of the upper bracket (401), and one end of the output shaft of the servo motor (411) and the inside of the mounting frame (407) are provided with a synchronous pulley (410), one end of the output shaft of the servo motor (411) and the two synchronous pulleys (410) inside the mounting frame (407) are connected by a synchronous belt (409), and a plurality of synchronous belts (409) are respectively fixed to a slide arranged on the track (408), a plurality of fences (5) are fixedly connected to the top of the patterned deck (3) and located around the test station (2), and a detachable steel chain (6) is hung between adjacent fences (5), and the detachable steel chain (6) forms a surrounding state for the test station (2).

10. A testing method for a vibration testing device, applicable to a vibration testing device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, confirm the model of the roller, then start the driving motor (1201), the driving motor (1201) rotates to drive the gear (1202) to rotate, and since the gear (1202) is meshed with the rack (1203), the gear (1202) rotates and moves along the rack (1203), so that the distance between the two adjustment frames (1003) is adjusted. At this time, the detachable deck (8) is inserted into the laying groove (9) through the insert (801), so as to complete the laying of the detachable deck (8), and the detachable deck (8) after laying can not only complete the walking support of the roller, but also can form an effective avoidance for the two sets of nonlinear stiffness model rollers (1001), thereby completing the adaptation of the test bench; S2: Since the top of the support platform (1101) is on the same horizontal plane as the nonlinear stiffness model roller (1001), the detachable deck (8) and the patterned deck (3), when the road roller is driven to the test station (2), the steel wheel of the road roller can be supported by the two support platforms (1101) until the steel wheel moves between the two nonlinear stiffness model rollers (1001). Then, the support platform (1101) is shortened by the support cylinder (1102) to drive the support platform (1101) to move downward. Therefore, the road roller and the steel wheel move downward at the same time until the steel wheel contacts the two nonlinear stiffness model rollers (1001) and is effectively supported by the two nonlinear stiffness model rollers (1001). At this time, the steel wheel and the support platform (1101) are out of the support state, thereby completing the rapid adaptation of the steel wheel of the road roller and the steel wheel of the road roller falling into the test station; S3: Then, the data acquisition system components are installed. The six-dimensional force sensor is installed on the contact surface between the steel wheel and the platform to monitor the combined force in all directions in real time. The laser displacement sensor is installed on both sides of the test station (2). The pressure transmitter is installed in the hydraulic system of the multi-directional damping system component to monitor the pressure difference between the inlet and outlet of the hydraulic cylinder and control the damping force in a closed loop. The infrared thermal imager is installed on the side of the steel wheel of the roller to monitor the bearing temperature of the steel wheel of the roller, so as to realize the accurate online measurement of various data of the roller during the vibration test. S4: Then, the multi-directional damping system components are adapted and installed. Four groups of equidistantly arranged vertical hydraulic cylinders directly act on the platform below the roller drum to form a vertical damping group; two groups of transversely arranged horizontal hydraulic cylinders are installed on the guide rails on both sides of the roller to suppress lateral swing to form a transverse damping group; two groups of longitudinally arranged horizontal hydraulic cylinders are installed in front of the roller to simulate travel resistance to form a longitudinal damping group; S5: Then, a no-load sweep frequency test is performed, and the self-test program is run under load, and the vertical damping group reciprocates in full stroke to verify the displacement-pressure linearity; The lateral damping group applies a step force and tests the response time; S6: After the no-load sweep frequency test is completed, load debugging is performed and a debugging mode is selected, such as a sand and gravel simulation mode. At this time, the nonlinear stiffness model roller (1001) supports asphalt medium simulation based on the Hertz contact theory; S7: Then start the vibration motor of the road roller to perform a vibration test. At this time, the data acquisition system components are used to complete the accurate online measurement of various data during the vibration test; S8: Then, fault simulation tests are carried out, such as bolt loosening simulation, which requires reducing pressure through the vertical damping group to simulate the failure of steel wheel fixation; eccentric block imbalance simulation, in which the lateral damping group applies periodic alternating force to simulate the phase deviation of the eccentric block; road roughness simulation, in which the longitudinal damping group outputs random fluctuation resistance, and the random fluctuation resistance needs to generate an excitation signal based on the ISO 8608 road spectrum to verify the alarm threshold of the roller system; S9: After debugging is completed, a debugging report is generated and uploaded to the cloud database.

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