Air suspension air pump testing device and testing method thereof

Abstract

The present application relates to air pump detection technical field, specifically to a kind of air suspension air pump testing device and testing method thereof, device includes machine body, setting in the working test area of machine body interior installation module, compensation module, sensing monitoring module and joint debugging joint control module;Installation module is connected through elastic member support and is used to install the installation piece of pump body, and vibrator is arranged below it;Compensation module includes height adjusting unit and connecting point pressurization unit;Sensing monitoring module is used to collect vibration acceleration and displacement data;Joint debugging joint control module judges the deviation of pump body actual vibration environment and target working condition based on real-time data, analyzes reason and triggers corresponding compensation mechanism;The method is through fixed pump body, simulates vibration, executes test, real-time monitoring and dynamic compensation etc. Step, realizes the dynamic stress environment of air pump under actual road condition, solves the potential fault that static test cannot expose, improves the accuracy of test.

Description

Technical Field

[0001] This invention relates to the field of air pump testing technology, specifically to an air suspension air pump testing device and its testing method. Background Technology

[0002] The air suspension pump relies on an electric motor to drive an air compressor, which generates compressed air and then delivers the compressed air to the air chambers of the air springs and shock absorbers, thereby adjusting the vehicle height. When the vehicle height needs to be increased, the air pump draws in air from the outside atmosphere, compresses it, and pumps it into the air springs. When the vehicle height needs to be decreased, the compressed air in the air springs is directly discharged into the atmosphere.

[0003] In the production process of air suspension air pumps, multiple tests are required to ensure their quality. Specifically, the air pump fills the closed pipeline with air until the target pressure is reached, then all valves are closed, and the system is kept in a static state for a period of time. Afterward, its performance is evaluated by observing or calculating the rate of pressure drop.

[0004] However, most existing testing equipment can only perform static testing, making it difficult to realistically simulate the dynamic working conditions such as high-frequency vibrations faced by air suspension pumps in actual road conditions. This results in some potential faults not being effectively detected during the testing phase.

[0005] Chinese Patent Application No. CN202510572002.6 discloses a convenient and rapid testing box device for air suspension air pumps, including a test box, a base plate, an eccentric wheel set, a switching mechanism, a transmission mechanism, and an air pump mounting mechanism. A box cover is rotatably hinged to the outside of the test box, an operation panel is fixedly connected inside the test box, and a hydraulic rod is fixedly connected to the inner wall of the box cover. This invention integrates a test box, a switchable eccentric wheel set, and a soundproof cover mechanism to achieve multi-condition dynamic simulation and noise isolation in a single device, effectively solving the problems of low testing efficiency, high cost, and data deviation in existing technologies. By setting up two sets of testing stations, a control group can be easily provided, making the tested air pump data more accurate and reliable. Modularly combining the testing equipment into a single test box makes the testing process more convenient, improves testing efficiency, and meets user needs.

[0006] Although the technical solution mentioned in the aforementioned document enables the performance testing of air pumps under high-frequency vibration conditions by using eccentric wheel sets, in actual application scenarios, if the performance testing target under multiple vibration frequency conditions is to be achieved, the eccentricity state of the eccentric wheel sets needs to be adjusted in real time; however, this operation process greatly reduces the testing efficiency and makes it difficult to meet actual needs.

[0007] Furthermore, although there are existing methods in the technology to fix an air pump on a vibrator to achieve performance testing at various vibration frequencies, the air pump itself has a certain weight. When it is installed on the vibrator, the weight of the air pump will interfere with the vibration of the vibrator. This interference can easily cause the actual vibration frequency that the air pump is subjected to to differ from the preset target frequency, thus adversely affecting the accuracy of the test results.

[0008] At the same time, since the air pump is an irregularly shaped component, its center of gravity distribution will affect the balance of the four corners of the vibrator during the vibration of the mounting plate. This imbalance will further aggravate the deviation between the actual frequency that the pump body bears and the target frequency, especially in the high-frequency random vibration mode, which will significantly interfere with the accuracy of the air pump performance test.

[0009] Furthermore, air pumps are usually fixed to vibrators with bolts to prevent them from shifting during operation. However, during performance testing under long-term vibration, if the connection between the air pump and the mounting plate becomes loose, it can also cause an excessive deviation between the actual frequency the pump body withstands and the target frequency, thus negatively affecting the accuracy of the air pump performance test. Summary of the Invention

[0010] The purpose of this invention is to provide an air suspension air pump testing device and testing method, which aims to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] This invention provides an air suspension air pump testing device, including a body, the interior of which is provided with a working test area, and further comprising:

[0013] The mounting module includes a support disposed inside the working test area, the support being connected to a mounting component for mounting the pump body via an elastic element, and a vibrator being disposed below the mounting component;

[0014] The compensation module includes a height adjustment unit disposed between the support and the mounting component, and a connection point pressurization unit disposed at the connection between the pump body and the mounting component;

[0015] The sensing and monitoring module includes an acceleration sensor for collecting vibration acceleration data at the four corners of the mounting component and at each connection point between the pump body and the mounting component; and a displacement sensor for monitoring the displacement at the four corners of the mounting plate.

[0016] The joint debugging and control module is electrically connected to the sensing and monitoring module, the vibrator, and the compensation module. It judges whether there is a deviation between the actual vibration environment of the pump body and the target vibration condition based on real-time data. When a deviation occurs, it analyzes the cause of the deviation and triggers the corresponding compensation mechanism to maintain or restore the expected test vibration environment.

[0017] Preferably, the mounting component includes:

[0018] The mounting plate is connected to the support by an elastic element and has a cavity inside. The cavity is divided into four independent areas by a partition.

[0019] The positioning components are arrayed on the mounting plate, and the bottom of the positioning components are connected to the docking components through the connection point pressurization unit. The pump body is connected to the docking components through bolts to realize the connection between the pump body and the mounting plate.

[0020] Preferably, the connection point pressurization unit includes:

[0021] A connecting rod is mounted on the mating part, with its end away from the mating part extending into the cavity through a sealing hole, and its end is provided with a sealing head to seal the sealing hole;

[0022] The compression section is located on the outside of the connecting rod to achieve the sealing of the sealing hole by the end cap;

[0023] The flexible component, located outside the compression section, causes the connecting rod to move upward and connect the cavity with the chamber of the flexible component when the bolt is tightened.

[0024] Preferably, when the joint debugging and control module determines that there is an imbalance in a certain corner of the mounting plate, compressed gas is introduced into the height adjustment unit corresponding to that corner to compensate for the horizontal imbalance of the mounting component;

[0025] When the joint debugging and control module determines that a certain connection point is loose, it introduces compressed gas into the corresponding connection point pressurization unit to increase the pre-tightening force of the connection point.

[0026] The present invention also provides a method for testing an air suspension pump using an air suspension pump testing device, the testing method comprising the following steps:

[0027] Step S100: Fix the pump body to be tested onto the mounting component, and start the vibrator through the joint debugging and control module to make it work at the preset target frequency in order to simulate the real working vibration environment of the pump body.

[0028] Step S200: Start the pump body under test and charge it into the closed test air circuit. Monitor the pressure change of the air circuit through the pressure transmitter and execute the standard air tightness test procedure.

[0029] Step S300: Collect vibration acceleration data in real time through the sensor monitoring module to determine whether there is a deviation between the actual frequency borne by the pump body and the target frequency;

[0030] Step S400: If the deviation between the actual frequency and the target frequency exceeds the threshold range, the joint debugging and control module starts the deviation cause diagnosis program to analyze whether there is an imbalance of the mounting components or a loose connection point of the pump body, and triggers the corresponding compensation mechanism based on the diagnosis results to dynamically adjust the vibration environment.

[0031] Step S500: After the vibration environment stabilizes at the target working condition or meets the requirements after compensation, continue to perform airtightness, performance and durability tests, and record the test data.

[0032] Preferably, the compensation mechanism in step S400 includes:

[0033] If the diagnosis reveals an imbalance in the mounting plate, the joint debugging and control module controls the height adjustment unit to adjust the support rigidity of the mounting plate at a specific angle to restore its horizontal posture.

[0034] If the diagnosis finds that a specific connection point between the pump body and the mounting plate is loose, the joint commissioning and control module controls the corresponding connection point pressurization unit to apply additional pre-tightening force to the connection point.

[0035] If the diagnosis indicates that the deviation is mainly caused by the change in the natural frequency due to the increase in system load, the joint debugging and control module will directly adjust the output frequency of the vibrator to compensate.

[0036] Preferably, the joint debugging and control module calculates the deviation rate between the actual dominant frequency and the target frequency, and compares the deviation rate with a preset threshold.

[0037] If the frequency deviation rate exceeds the set threshold, it indicates that the vibration environment of the pump body is abnormal. It is necessary to determine the height balance of the four corners of the mounting plate and the connection strength of each connection point between the pump body and the mounting plate, and make corresponding adjustments.

[0038] Preferably, the joint debugging and control module analyzes the deviation between the real-time height of each corner and the average height of the four corners. If the absolute value of the height deviation of a certain corner exceeds a set threshold range, it is determined that there is a height imbalance in that corner.

[0039] Preferably, the joint debugging and control module analyzes the vibration trend of each connection point between the pump body and the mounting plate. If the vibration trend of a certain connection point is non-linear, it is determined that the connection point is loose.

[0040] Preferably, after the compensation mechanism is executed, the joint debugging and control module collects vibration data again through the sensor monitoring module to verify whether the frequency deviation has been corrected to the allowable range; if it has been corrected, proceed to step S500; if it has not been corrected, repeat step S400 for secondary diagnosis and compensation, or interrupt the test and issue an alarm.

[0041] The technical effects and advantages of this invention are as follows:

[0042] 1. By setting up a mounting module that includes an elastic support and a vibrator, and integrating a pressure transmitter and a display, this invention can simultaneously simulate real high-frequency vibration conditions when performing performance tests on an air pump. This effectively reproduces the dynamic stress environment faced by the air pump under actual road conditions, thereby exposing potential faults that may be hidden in static tests, and significantly improving the accuracy and reliability of the test.

[0043] 2. This invention, by introducing a compensation module, a sensing and monitoring module, and a joint debugging and control center, constructs an intelligent system capable of real-time diagnosis and dynamic compensation for imbalances and frequency deviations in the mounting plate caused by the pump's own weight, uneven center of gravity distribution, or loose connection points during testing. This system comprehensively analyzes the relative height of each corner of the mounting plate and the vibration trends of each connection point to determine whether imbalance or looseness has occurred. It then coordinates compensation by controlling the height adjustment unit and the cavity pressure at the connection points, and adjusts the vibrator output accordingly. This ensures that the actual vibration frequency experienced by the pump body always accurately matches the target frequency of the simulated target road conditions, greatly reducing the impact of interference factors on the test results. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the working test area of ​​the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the mounting module of the present invention;

[0047] Figure 4 This is a schematic diagram showing the distribution of various regions of the mounting plate of the present invention;

[0048] Figure 5 This is a schematic diagram of the internal structure of the mounting plate of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of the mounting module of the present invention after the pump body is loaded;

[0050] Figure 7 This is a schematic diagram of the connection structure between the bolt and the mating part of the present invention.

[0051] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0052] In the picture:

[0053] 100. Pump body;

[0054] 1. Organism;

[0055] 2. Working test area;

[0056] 3. Mounting module; 301. Mounting component; 3011. Mounting plate; 3012. Cavity; 3013. Partition; 3014. Positioning component; 302. Elastic component; 303. Support;

[0057] 4. Bolts;

[0058] 5. Connecting parts;

[0059] 6. Compensation module; 601. Height adjustment unit; 602. Connection point pressurization unit; 6021. Sealing hole; 6022. Compression section; 6023. Flexible component; 6024. Connecting rod; 6025. End cap;

[0060] 7. Vibrator;

[0061] 8. Pressure transmitter;

[0062] 9. Button module;

[0063] 10. Monitor;

[0064] 11. Motor voltage regulating power supply;

[0065] 12. Solenoid valve voltage regulating power supply. Detailed Implementation

[0066] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0067] Example 1

[0068] Reference Figures 1 to 8 As shown, the present invention provides an air suspension air pump testing device, including a body 1, a working test area 2 inside the body 1, and a mounting module 3. The mounting module 3 includes a support 303 disposed inside the working test area 2. The support 303 is connected to a mounting member 301 for mounting a pump body 100 through an elastic member 302. A vibrator 7 is disposed below the mounting member 301.

[0069] Reference Figures 1 to 3 As shown, a pressure transmitter 8 is installed inside the working test area 2. The pressure transmitter 8 is used to monitor the test of the air pump.

[0070] Reference Figures 1 to 2 As shown, the top of the machine body 1 is provided with a display 10 for displaying test curves. The display 10 is used to display the pressure value reached by the air pump under a set working current within a set time, thereby reflecting the relationship between working current, inflation speed and pressure.

[0071] Reference Figures 1 to 2 As shown, the machine body 1 is also equipped with a button module 9 for controlling the start and stop of the air pump, as well as a motor voltage regulator 11 and a solenoid valve voltage regulator 12 for supplying power to the air pump.

[0072] Reference Figures 2 to 8 As shown, the mounting component 301 includes a mounting plate 3011, on which positioning components 3014 are arranged in an array. The positioning components 3014 include positioning holes. The bottom of the positioning components 3014 is connected to a docking component 5. The pump body 100 is connected to the docking component 5 by bolts 4 to realize the connection between the pump body 100 and the mounting plate 3011.

[0073] In use, the pump body 100 is placed in the central area of ​​the mounting plate 3011 and connected to the docking part 5 by bolt 4 to fix the pump body 100 to the mounting plate 3011.

[0074] During testing, the pump body 100 is started via button module 9. The motor voltage regulating power supply 11 supplies a pre-set operating current to the compressor section of the pump body 100 to generate the corresponding speed of the compressor. The compressor compresses the outside air and delivers the compressed air to the closed pipeline. During this process, the pressure transmitter 8 monitors the air pressure value that the air pump can reach at different time periods under the current operating current to determine whether the performance of the pump body 100 is qualified.

[0075] While the pump body 100 is being tested, the display 10 generates a corresponding pressure curve based on the air pressure value reached by the pump body 100 under the current operating current at different time periods, thereby intuitively reflecting the performance parameters of the pump body 100.

[0076] It should be noted that during the testing of the pump body 100, the control system controls the vibrator 7 located below the mounting component 301 to simulate the dynamic working conditions such as high-frequency vibration faced by the pump body 100 in actual road conditions, thereby reflecting potential faults that may be hidden in the pump body 100 during the testing phase.

[0077] It should be noted that a sound insulation part is attached to the working test area 2 inside the body 1 in this application, and a noise collector is provided on the sound insulation part to collect the noise generated when the pump body 100 is working, so as to provide a reference for subsequent quality assessment.

[0078] Example 2

[0079] Reference Figures 1 to 8 As shown, the present invention also provides a method for testing an air suspension pump using an air suspension pump testing device, the testing method comprising the following steps:

[0080] S100. First, install the pump body 100 on the mounting plate 3011 and start the vibrator 7 to the preset target frequency.

[0081] Specifically, the testers placed the pump body 100 on the mounting plate 3011 and connected it to the docking piece 5 with bolts 4 to fix the pump body 100 to the mounting plate 3011. Then, the air outlet of the pump body 100 was connected to the air pressure detection device through a hose. The air pressure detection device is the closed pipeline mentioned in Example 1. At the same time, the power cord of the motor voltage regulating power supply 11 was electrically connected to the compressor part of the pump body 100, thus completing the installation of the pump body 100.

[0082] After the pump body 100 is fixedly connected to the mounting plate 3011, the tester starts the vibrator 7 mounted on the mounting plate 3011 by using the button module 9 located on the outside of the body 1, so that the vibrator 7 reaches the preset target frequency.

[0083] It should be noted that the button module 9 includes multiple buttons, which control multiple electrical devices on the body 1 to start and stop. This is existing technology and will not be described in detail here.

[0084] It should be noted that the target frequency is set in advance or selected based on typical operating condition data of the pump body 100 in a real vehicle operating environment; for example, based on the vibration spectrum characteristics collected when the vehicle accelerates rapidly, brakes, continuously changes load, or passes through a specific road surface, one or more representative frequency values ​​or frequency curves are determined as targets; this set target frequency is used to drive the vibrator 7 to reproduce the vibration environment experienced by the pump body 100 in actual operation during the test.

[0085] S200. After that, the tester started the pump body 100 to perform the standard airtightness test procedure in order to determine the airtightness performance of the pump body 100.

[0086] Specifically, the tester starts the pump body 100 by pressing the button module 9. The motor voltage regulating power supply 11 supplies a pre-set working current to the compressor part of the air pump so that the compressor generates the corresponding speed. The compressor compresses the outside air and delivers the compressed air to the closed pipeline. During this process, the pressure transmitter 8 monitors the air pressure value that the pump body 100 can reach at different time periods under the current working current in order to determine whether the performance of the air pump is qualified.

[0087] If the pressure transmitter 8 detects that the pump body 100 can reach the corresponding preset air pressure value at different time periods under the current operating current, it indicates that the airtightness of the pump body 100 is intact under the current vibration frequency of the vibrator 7.

[0088] If the pressure transmitter 8 detects that the pump body 100 fails to reach or partially fails to reach the corresponding preset air pressure value at different time periods under the current operating current, it indicates that the airtightness of the pump body 100 at the current vibration frequency of the vibrator 7 may be compromised.

[0089] Example 3

[0090] When the pump body 100 is tested under vibration, the weight of the pump body 100, the height of the four corners of the mounting plate 3011, and the connection strength between the pump body 100 and the mounting plate 3011 all interfere with the actual vibration environment of the pump body 100. Therefore, it is necessary to judge and adjust the vibration environment of the pump body 100 to ensure that the vibration environment of the pump body 100 is in a set state, thereby improving the reliability of the airtightness test results of the pump body 100. In view of this, improvements are made based on Embodiment 1 and Embodiment 2. The improved solution is as follows:

[0091] Reference Figures 1 to 8 As shown, the present invention provides an air suspension air pump testing device, which also includes a compensation module 6. The compensation module 6 includes a height adjustment unit 601 disposed between the support 303 and the mounting component 301, and a connection point pressurization unit 602 disposed at the connection between the pump body 100 and the mounting component 301.

[0092] Reference Figures 1 to 5 As shown, the mounting component 301 includes a mounting plate 3011, which is connected to the support 303 via an elastic member 302. The mounting plate 3011 has a cavity 3012 inside, and a partition 3013 is provided inside the cavity 3012, which divides the cavity 3012 into four independent areas.

[0093] Reference Figure 4As shown, the partition 3013 divides the cavity 3012 into four independent areas: A, B, C, and D. These four independent areas are connected to the standby air pump through air supply pipes.

[0094] The mounting component 301 also includes positioning components 3014 arrayed on the mounting plate 3011. The bottom of the positioning component 3014 is connected to a docking component 5 through a connection point pressurization unit 602. The pump body 100 is connected to the docking component 5 through bolts 4 to realize the connection between the pump body 100 and the mounting plate 3011. The docking component 5 includes a nut.

[0095] Reference Figures 6 to 8 As shown, the connection point pressurization unit 602 includes a connecting rod 6024 disposed on the docking member 5. The end of the connecting rod 6024 away from the docking member 5 extends into the cavity 3012 through the sealing hole 6021, and the end of the connecting rod 6024 away from the docking member 5 is provided with a sealing head 6025 to seal the sealing hole 6021; the end of the sealing hole 6021 facing the cavity 3012 is provided with a flexible pad to improve the sealing effect of the sealing head 6025 on the sealing hole 6021.

[0096] The connection point pressurization unit 602 also includes a compression part 6022 disposed on the outside of the connecting rod 6024 to achieve the sealing of the sealing hole 6021 by the end cap 6025; a flexible member 6023 is provided on the outside of the compression part 6022. When the bolt 4 is tightened, the connecting rod 6024 moves upward and the cavity 3012 communicates with the chamber of the flexible member 6023.

[0097] The compression section 6022 includes a spring, and the flexible part 6023 includes a bellows. When the pump body 100 is not yet loaded, the compression section 6022 pushes the docking part 5, at which time the sealing hole 6021 is in a blocked state. After the pump body 100 is loaded on the mounting plate 3011, when the bolt part 4 is tightened, it drives the docking part 5 to move upward, and the docking part 5 drives the connecting rod 6024 to move upward simultaneously, so that the sealing hole 6021 is in a non-blocked state.

[0098] The air suspension air pump testing device also includes a sensing and monitoring module and a joint debugging and control module. The sensing and monitoring module includes an acceleration sensor for collecting vibration acceleration data at the four corners of the mounting component 301 and at each connection point between the pump body 100 and the mounting component 301; and a displacement sensor for monitoring the displacement of the four corners of the mounting plate 3011.

[0099] The joint debugging and control module is electrically connected to the sensing and monitoring module, the vibrator 7, and the compensation module 6; it calculates the frequency deviation based on the vibration acceleration data, diagnoses the cause of the deviation, and coordinates the compensation module 6 and the vibrator 7 to perform dynamic compensation based on the diagnosis results.

[0100] Reference Figures 1 to 8As shown, the present invention also provides a method for testing an air suspension pump using an air suspension pump testing device, the testing method comprising the following steps:

[0101] S100. First, install the pump body 100 on the mounting plate 3011 and start the vibrator 7 to the preset target frequency.

[0102] S200. After that, the tester started the pump body 100 to perform the standard airtightness test procedure in order to determine the airtightness performance of the pump body 100.

[0103] S300. The vibration acceleration data is collected in real time through the sensor monitoring module to determine whether there is a deviation between the actual frequency borne by the pump body 100 and the target frequency.

[0104] Specifically, an array of acceleration sensors pre-installed on the mounting plate 3011 and at each connection point between the pump body 100 and the mounting plate 3011 is used to collect high-frequency random vibration signals excited by the vibrator 7 in real time. The original vibration acceleration signals collected by the sensors are first filtered to eliminate environmental noise interference, and then transmitted to the joint debugging and control module for signal analysis.

[0105] The integrated debugging and control module has a built-in signal processing unit that analyzes the received timing signal and extracts the dominant vibration frequency component, which is the actual frequency that the pump body 100 is subjected to.

[0106] By comparing the preset target frequency with the actual frequency experienced by the pump body 100, the deviation rate between the target frequency and the actual frequency is obtained. If the frequency deviation rate does not exceed the set threshold, it indicates that the vibration environment of the pump body 100 is in a normal state. At this time, the airtightness detection of the pump body 100 is highly accurate.

[0107] If the frequency deviation rate exceeds the set threshold, it indicates that the vibration environment of the pump body 100 is abnormal. It is necessary to determine the height balance of the four corners of the mounting plate 3011 and the connection strength of each connection point between the pump body 100 and the mounting plate 3011, and make corresponding adjustments.

[0108] S400. When the actual frequency borne by the pump body 100 deviates from the target frequency, the height values ​​between the four corners of the mounting plate 3011 and the reference plane are analyzed to determine whether there is an imbalance of the mounting plate 3011. The vibration signals at each connection point between the pump body 100 and the mounting plate 3011 are analyzed to determine whether there is a loose connection point.

[0109] Specifically, when the frequency actually borne by the pump body 100 deviates from the target frequency, it is necessary to determine the height balance of the four corners of the mounting plate 3011 and the connection strength of each connection point between the pump body 100 and the mounting plate 3011.

[0110] When determining the height balance of the four corners of the mounting plate 3011, height sensors or laser displacement sensors installed at the four corners of the mounting plate 3011 are used to monitor and obtain the height value of each corner relative to the absolute reference plane or the initial balance state in real time, and calculate the deviation between the real-time height of each corner and the average height of the four corners. If the absolute value of the height deviation of a certain corner of the mounting plate 3011 is found to exceed the set threshold range, it is confirmed that there is a significant sinking or lifting of that corner.

[0111] If the mounting plate 3011 is determined to be unbalanced, a targeted compensation command will be triggered. For example, the backup air pump will be started to inflate the height adjustment unit 601 corresponding to the low height angle, so as to increase the rigidity of the height adjustment unit 601, thereby changing the elastic coefficient of the elastic element 302, thereby indirectly raising the height of the low height angle of the mounting plate 3011 to restore the horizontal posture of the mounting plate 3011. The height adjustment unit 601 includes a buffer element.

[0112] If the absolute values ​​of the height deviations of the four corners of the mounting plate 3011 are all within the set threshold range, it indicates that the mounting plate 3011 is not in an unbalanced state.

[0113] When determining the connection strength of each connection point between the pump body 100 and the mounting plate 3011, the vibration transfer function between each connection point and the mounting plate 3011 is analyzed to determine the state of the connection point. When a connection point is well secured, the vibration response between the pump body 100 and the mounting plate 3011 is continuous and linear. Conversely, when a connection point is loose, nonlinear vibration will occur at the contact interface, especially in the high-frequency range, which will excite local resonance and cause a significant change in the vibration transmission characteristics, that is, abnormal peak values ​​with amplitudes exceeding the threshold appear in the high-frequency range.

[0114] When the vibration transfer function of the connection point between the pump body 100 and the mounting plate 3011 does not exceed the threshold in the high-frequency band, it indicates that the connection between the pump body 100 and the mounting plate 3011 is not loose.

[0115] When the vibration transfer function of a certain connection point exhibits an abnormal peak value exceeding the threshold in the high-frequency band, it is determined that the connection point is loose. At this time, the system introduces compressed gas into the cavity 3012 structure corresponding to the specific connection point. The gas enters the flexible part 6023 through the sealing hole 6021 and pushes the docking part 5 downward, thereby applying an additional downward force to the bolt part 4 to enhance the preload and eliminate the abnormal high-frequency vibration caused by the loose connection.

[0116] It should be noted that when the pump body 100 is fixed to the mounting plate 3011, the bolt 4 and the connecting part 5 are tightened. When the bolt 4 begins to tighten, the connecting rod 6024 moves upward to connect the cavity 3012 of the mounting plate 3011 with the interior of the flexible part 6023, so as to create conditions for the compensation of compressed gas.

[0117] If the frequency deviation rate exceeds the set threshold, but the connection between the pump body 100 and the mounting plate 3011 is not loose and the mounting plate 3011 is not in an unbalanced state, it indicates that after the mounting plate 3011 loads the pump body 100, the total mass of the system increases, which in turn leads to a decrease in the natural frequency. At this time, the controller increases the set frequency of the vibrator 7 to compensate for the deviation between the actual frequency borne by the pump body 100 and the target frequency.

[0118] It should be noted that if the frequency deviation rate exceeds the set threshold, and the connection between the pump body 100 and the mounting plate 3011 becomes loose and the mounting plate 3011 is also in an unbalanced state, the synchronous compensation mode is activated. That is, the pressure adjustment of the height adjustment unit 601 and the pressurization of the connection point are executed simultaneously. However, in order to avoid mutual interference between the actions of the backup air pump and the system oscillation, in this case, the step size of the air pressure adjustment is actively reduced and the stabilization waiting time after each adjustment step is extended to ensure that the system response is stable.

[0119] After adjusting the height adjustment unit 601 and / or the connection point pressurization unit 602, if the frequency deviation rate is within the set threshold range, it indicates that the vibration environment of the pump body 100 is currently in a normal state, and the airtightness test of the pump body 100 continues. If, after adjusting the height adjustment unit 601 and / or the connection point pressurization unit 602, the frequency deviation rate exceeds the threshold again, it indicates that the dynamic balance of the assembly of the placement plate and the pump body 100 has changed due to long-term vibration. At this time, the system interrupts the standard airtightness test measurement process to perform deviation cause diagnosis, fault diagnosis and compensation processing, that is, to perform a second deviation cause diagnosis.

[0120] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0121] Although embodiments of the invention have been shown and described, those skilled in the art will recognize that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air suspension air pump testing device, comprising a machine body (1), the inside of the machine body (1) is provided with a working testing area (2), characterized in that, Also comprising: a setting module (3) comprising a support (303) arranged inside the working test area (2), the support (303) being connected with a setting part (301) for mounting the pump body (100) through elastic members (302), a vibrator (7) being arranged below the setting part (301); a compensation module (6) comprising a height adjusting unit (601) arranged between the support (303) and the setting part (301), and a connecting point pressurizing unit (602) arranged at the connecting position of the pump body (100) and the setting part (301); the setting part (301) comprises: a setting plate (3011) connected with the support (303) through elastic members (302), and a cavity (3012) being arranged inside the setting plate (3011), a partition plate (3013) being arranged inside the cavity (3012), the partition plate (3013) dividing the cavity (3012) into four independent areas; a positioning part (3014) arrayed on the setting plate (3011), a docking part (5) being connected with the positioning part (3014) through the connecting point pressurizing unit (602), the pump body (100) being connected with the docking part (5) through bolt members (4) to realize the connection between the pump body (100) and the setting plate (3011); a sensing and monitoring module comprising acceleration sensors for collecting vibration acceleration data of the four corners of the setting part (301) and the connecting points of the pump body (100) and the setting part (301), and displacement sensors for monitoring the displacement of the four corners of the setting plate (3011); a joint debugging and control module being electrically connected with the sensing and monitoring module, the vibrator (7) and the compensation module (6), and judging whether the actual vibration environment of the pump body (100) and the target vibration working condition deviate based on real-time data; when the deviation occurs, analyzing the deviation reason and triggering the corresponding compensation mechanism to restore the expected test vibration environment; when the joint debugging and control module determines that there is imbalance at a corner of the setting plate (3011), compressed gas is supplied to the height adjusting unit (601) corresponding to the corner to compensate for the horizontal imbalance of the setting part (301); when the joint debugging and control module determines that there is looseness at a connecting point, compressed gas is supplied to the connecting point pressurizing unit (602) corresponding to the connecting point to enhance the pretightening force of the connecting point.

2. The air suspension air pump testing device of claim 1, wherein, the connecting point pressurizing unit (602) comprises: a connecting rod (6024) arranged on the docking part (5), one end of the connecting rod (6024) away from the docking part (5) extending into the cavity (3012) through a sealing hole (6021), and an end of the connecting rod (6024) being provided with a sealing head (6025) for sealing the sealing hole (6021); a compression part (6022) arranged outside the connecting rod (6024) to realize the sealing of the sealing head (6025) to the sealing hole (6021); a flexible member (6023) arranged outside the compression part (6022), when the bolt member (4) is tightened, the connecting rod (6024) moves upward and makes the cavity (3012) communicate with the chamber of the flexible member (6023).

3. An air suspension air pump testing method for testing an air suspension air pump by using the air suspension air pump testing device according to claim 2, characterized in that the testing method comprises the following steps: S100, fixing the pump body (100) to be tested on the mounting piece (301), starting the vibrator (7) through the joint debugging and control module, and making the vibrator (7) work at a preset target frequency to simulate the real working vibration environment of the pump body (100); S200, starting the pump body (100) to be tested, making the pump body (100) to inflate the closed test air path, monitoring the air path pressure change through the pressure transmitter (8), and executing a standard air tightness test process; S300, collecting vibration acceleration data in real time through the sensing monitoring module to determine whether the actual frequency borne by the pump body (100) deviates from the target frequency; S400, if the deviation of the actual frequency borne from the target frequency exceeds a threshold range, starting the deviation cause diagnosis program of the joint debugging and control module, analyzing whether the mounting piece (301) is unbalanced or the connection point of the pump body (100) is loose, and triggering the corresponding compensation mechanism according to the diagnosis result to dynamically adjust the vibration environment; S500, after the vibration environment is stabilized at the target working condition or meets the requirements after compensation, continuing to execute the air tightness and durability test, and recording the test data. The compensation mechanism in the step S400 comprises:

4. The test method of claim 3, wherein, if the diagnosis finds that the mounting plate (3011) is unbalanced, the joint debugging and control module controls the height adjusting unit (601) to act, restores the horizontal posture of the mounting plate (3011) by adjusting the support rigidity of a specific angle of the mounting plate (3011); if the diagnosis finds that a specific connection point of the pump body (100) and the mounting plate (3011) is loose, the joint debugging and control module controls the connection point pressurizing unit (602) corresponding to the connection point to act, and applies additional pre-tightening force to the connection point; if the diagnosis shows that the deviation is caused by the change of the inherent frequency due to the increase of the system load, the joint debugging and control module directly adjusts the output frequency of the vibrator (7) for compensation. The joint debugging and control module calculates the deviation rate of the actual frequency borne from the target frequency, and compares the deviation rate with a preset threshold; 5. The test method of claim 4, wherein, if the deviation rate exceeds the set threshold, it indicates that the vibration environment of the pump body (100) at present is abnormal, and the height balance state of the four corners of the mounting plate (3011) and the connection strength of each connection point of the pump body (100) and the mounting plate (3011) need to be determined and adjusted accordingly. The joint debugging and control module analyzes the deviation of the real-time height of each corner from the average height of the four corners, and if the absolute value of the height deviation of a certain corner exceeds the set threshold range, it is determined that the corner is unbalanced in height.

6. The test method of claim 5, wherein, The joint debugging and control module analyzes the vibration trend of each connection point of the pump body and the mounting plate, and if the vibration trend of a certain connection point is nonlinear vibration, it is determined that the connection point is loose.

7. The test method of claim 6, wherein, ​ 8. The test method of claim 7, wherein, After the compensation mechanism is executed, the joint test and control module collects vibration data again through the sensing monitoring module to verify whether the frequency deviation has been corrected to the allowable range; if yes, step S500 is entered; if not, step S400 is repeatedly executed for secondary diagnosis and compensation, or the test is interrupted and an alarm is issued.

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