Test method and device for bearing comprehensive loading, main driving device and medium

Abstract

This invention discloses a test method, apparatus, main drive device, and medium for comprehensive bearing loading, applicable to the field of bearing testing technology. The main drive device is initialized; the same axial load, radial load, and overturning moment are applied to a reference main bearing and a test main bearing respectively to obtain the actual pressure and flow rate signal values ​​corresponding to the reference and test main bearings; the load loading value of the test main bearing is determined based on the relationship between the actual pressure and flow rate signal values ​​and the load set value to achieve comprehensive loading testing of the bearing under the same loading conditions. It can independently apply comprehensive loads to two sets of main bearings of the same specification, conducting comparative studies under the same or different working conditions to simulate the load loading values ​​borne by the bearings during the actual excavation process of a full-face tunnel boring machine, realizing the actual working conditions of the main drive bearing, and further obtaining real and effective data to guide the design and manufacturing of the main bearing, improving the reliability of the main bearing.

Description

Technical Field

[0001] This invention relates to the field of bearing testing technology, and in particular to a test method, apparatus, main drive equipment and medium for bearing comprehensive loading. Background Technology

[0002] Bearings, as a key component of the cutterhead drive system in a full-face tunnel boring machine (TBM), are considered the "heart" of the machine. During tunneling, they encounter various complex geological formations and extremely harsh working conditions, enduring enormous loads, high confining pressures, and intense temperature rises. Their performance directly affects the performance and lifespan of the TBM. Currently, main bearings are almost entirely dependent on imports, making them a critical "bottleneck" component. To overcome the final hurdle of achieving complete domestic production of TBMs, it is urgent to develop domestically produced main bearings to break through foreign technological barriers. Therefore, the development of a comprehensive bearing loading test system and testing technology is of great significance for studying and testing the performance of domestically produced main bearings.

[0003] Current comprehensive bearing loading test systems primarily focus on testing high-speed, light-load bearings, with relatively limited testing and exploration in the main bearings of full-face tunnel boring machines. The loading methods and forces used in existing bearing loading tests differ from those of full-face tunnel boring machine main bearings, thus failing to simulate the actual working conditions of real main drive bearings. Consequently, reliable and effective data cannot be obtained to guide the design and manufacturing of main bearings, leading to reduced reliability.

[0004] Therefore, finding a test method for comprehensive bearing loading is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a test method, device, main drive equipment and medium for comprehensive bearing loading, to realize the actual working conditions of the main drive bearing, and to obtain real and effective data until the main bearing is designed and manufactured, thereby improving the reliability of the main bearing.

[0006] To address the aforementioned technical problems, this invention provides a method for testing comprehensive bearing loading, applied to a main drive system. Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive system, wherein the two sets of main bearings serve as a reference main bearing and an experimental main bearing. The method includes:

[0007] Initialize the main drive device;

[0008] The same axial load, radial load, and overturning moment were applied to the reference main bearing and the experimental main bearing, respectively, to obtain the actual pressure and flow rate signal values ​​corresponding to the reference main bearing and the experimental main bearing;

[0009] The load value of the experimental main bearing is determined based on the relationship between the actual pressure and flow signal value and the load setting value in order to achieve comprehensive load testing of the bearing under the same loading conditions.

[0010] Preferably, initializing the main drive device includes:

[0011] Check the meshing and communication status of the transmission gears corresponding to the main drive device, the reference main bearing, and the experimental main bearing;

[0012] When both the engagement and communication states are normal, the main drive device initialization is considered complete.

[0013] Preferably, the load value of the experimental main bearing is determined based on the relationship between the actual pressure and flow rate signal value and the load set value, including:

[0014] The first actual pressure and flow rate signal value corresponding to the reference main bearing, the second actual pressure and flow rate signal value corresponding to the experimental main bearing, and the load setting value will be compared.

[0015] The load value of the experimental main bearing was adjusted based on the comparison results;

[0016] The adjusted load value was used as the load value for the experimental main bearing.

[0017] Preferably, it further includes:

[0018] The same confining pressure was applied to the reference main bearing and the experimental main bearing respectively to obtain the actual pressure and flow rate signal values ​​corresponding to the reference main bearing and the experimental main bearing.

[0019] The actual confining pressure value of the experimental main bearing is determined based on the relationship between the actual pressure and flow rate signal value and the confining pressure setting value.

[0020] Preferably, it further includes:

[0021] The same temperature value is applied to both the reference main bearing and the experimental main bearing to obtain the current temperature values ​​corresponding to the reference main bearing and the experimental main bearing;

[0022] The actual temperature value of the experimental main bearing is determined based on the relationship between the current temperature value and the temperature setpoint.

[0023] Preferably, it further includes:

[0024] The same hydraulic medium pressure and flow rate are applied to the reference main bearing and the experimental main bearing respectively to obtain the corresponding signal values ​​of the reference main bearing and the experimental main bearing. The signal values ​​include at least the current pressure value, current flow rate value, current temperature value and current particle size of the reference main bearing and the experimental main bearing.

[0025] The actual hydraulic medium pressure and flow rate of the experimental main bearing are determined based on the relationship between the signal value and the hydraulic medium set value.

[0026] The same power torque value and power speed value are applied to the reference main bearing and the experimental main bearing respectively to obtain the torque speed signal values ​​corresponding to the reference main bearing and the experimental main bearing;

[0027] The actual torque and speed signal value of the experimental main bearing is determined based on the relationship between the torque and speed signal value and the torque and speed set value.

[0028] Preferably, it further includes:

[0029] The comprehensive parameters of the experimental main bearing are determined by comprehensively analyzing the load value, actual confining pressure value, actual temperature value, actual hydraulic medium flow rate value, and actual torque and speed signal value.

[0030] To address the aforementioned technical problems, this invention also provides a bearing comprehensive loading test device. Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive equipment, wherein the two sets of main bearings serve as a reference main bearing and an experimental main bearing. The device includes:

[0031] The initialization module is used to initialize the main drive device;

[0032] An application processing module is used to apply the same axial load, radial load, and overturning moment to the reference main bearing and the experimental main bearing, respectively, in order to obtain the actual pressure and flow signal values ​​corresponding to the reference main bearing and the experimental main bearing.

[0033] The determination module is used to determine the load value of the experimental main bearing based on the relationship between the actual pressure and flow signal value and the load setting value, so as to realize the comprehensive load test of the bearing under the same loading conditions.

[0034] To address the aforementioned technical problems, the present invention also provides a main drive device, comprising:

[0035] Memory, used to store computer programs;

[0036] A processor is used to execute computer programs to implement the steps of the test method for comprehensive bearing loading as described above.

[0037] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the bearing comprehensive loading test method described above.

[0038] This invention provides a comprehensive bearing loading test method applied to a main drive system. Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive system, serving as a reference bearing and an experimental bearing. The method includes: initializing the main drive system; applying the same axial load, radial load, and overturning moment to the reference and experimental bearings respectively to obtain the corresponding actual pressure and flow rate signal values; and determining the load value of the experimental bearing based on the relationship between the actual pressure and flow rate signal values ​​and the load setting value to achieve a comprehensive loading test under the same bearing loading conditions. This method can independently apply comprehensive loads to two sets of identical main bearings, conducting comparative studies under the same or different working conditions. By setting the same axial load, radial load, and overturning moment, it simulates the load values ​​borne by the bearings during the actual excavation process of a full-face tunnel boring machine, realizing the actual working conditions of the main drive bearings. Furthermore, it obtains accurate and effective data to guide the design and manufacturing of the main bearings, improving their reliability.

[0039] In addition, the present invention also provides a bearing comprehensive loading test device, main drive equipment and medium, which have the same beneficial effects as the bearing comprehensive loading test method described above. Attached Figure Description

[0040] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the bearing integrated loading test system;

[0042] Figure 2 A flowchart of a bearing comprehensive loading test method provided in an embodiment of the present invention;

[0043] Figure 3 A structural diagram of a bearing comprehensive loading test device provided in an embodiment of the present invention;

[0044] Figure 4 A structural diagram of a main drive device provided in an embodiment of the present invention;

[0045] Figure 5 A structural diagram of another bearing comprehensive loading test device provided in an embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of a lubrication and cooling system provided in an embodiment of the present invention;

[0047] Figure 7 A schematic diagram of the structure of an environmental simulation system provided in an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of a monitoring system provided in an embodiment of the present invention. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0050] The core of this invention is to provide a test method, device, main drive equipment and medium for comprehensive bearing loading, to realize the actual working conditions of the main drive bearing, and to obtain real and effective data until the main bearing is designed and manufactured, thereby improving the reliability of the main bearing.

[0051] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] It should be noted that the bearing comprehensive loading test method provided by the present invention is applicable to the symmetrical performance test experiment of two sets of bearings of the same specification on the left and right sides. The bearings are mainly applicable to the interior of full-face tunnel boring machines. Figure 1 This is a schematic diagram of the bearing integrated loading test system, as shown below. Figure 1 As shown, its testing system includes a control system 1, a main drive system 2, a lubrication and cooling system 3, an environmental simulation system 4, a monitoring system 5, a test bearing 6, and a mechanical structure body 7. The environmental simulation system 4 includes a load loading system, a confining pressure simulation system, and a temperature simulation system.

[0053] Two sets of main bearings of the same specifications are symmetrically installed in the main drive system 2. The monitoring modules used in the monitoring system 5 are symmetrically distributed at the test positions in the bearing comprehensive loading test system. The load values ​​of the load loading system, the confining pressure simulation system and the temperature value of the temperature simulation system are adjusted to the simulated working condition set values ​​through the control system 1. The main drive system 2 and the lubrication and cooling system 3 are turned on to test the performance of the test bearing 6. During the test, the monitoring module 5 acquires the full-process status monitoring data of the two sets of bearings and performs real-time status comparison and analysis to achieve early identification and diagnosis of the bearing failure under test.

[0054] Figure 2 A flowchart of a bearing comprehensive loading test method provided in an embodiment of the present invention is shown below. Figure 2As shown, this method is applied to the main drive equipment. Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive equipment. The two sets of main bearings serve as a reference main bearing and an experimental main bearing. The method includes:

[0055] S11: Initialize the main drive device;

[0056] S12: Apply the same axial load, radial load and overturning moment to the reference main bearing and the experimental main bearing respectively to obtain the actual pressure and flow signal values ​​corresponding to the reference main bearing and the experimental main bearing;

[0057] S13: Determine the load value of the experimental main bearing based on the relationship between the actual pressure and flow signal value and the load setting value to achieve comprehensive load testing of the bearing under the same loading conditions.

[0058] Specifically, the main drive equipment is used to provide rotational power to the test bearing. Two sets of main bearings of the same specifications are symmetrically installed back to back on both sides of the main drive equipment. One of them serves as a reference main bearing, and the other serves as the experimental main bearing. The parameter values ​​generated by the reference main bearing during the test are used as a reference to study the performance of the experimental main bearing under different loading values ​​and improve the reliability of the main bearing.

[0059] Before load testing, an initialization process is required to ensure the normal operation of the main bearing and main drive equipment during the test. The initialization process specifically includes software and hardware initialization. Hardware initialization involves checking the hardware parameters of each hardware device and the current transmission engagement state of the main drive equipment. It should be noted that, due to the transmission state settings between the main drive equipment and the main bearing, if the transmission state is belt drive, the wear of the belt is checked; if the transmission state is gear drive, the meshing of the gears is checked. This invention is primarily based on the fact that the bearings of the full-face tunnel boring machine operate as large bearings, while belt drives are only suitable for small bearings; therefore, this invention uses gear drive. Software initialization includes checking the communication status between various hardware devices and whether the set values ​​of various variables are set. This invention does not impose specific limitations on the initialization process and can be set according to the actual situation.

[0060] After initialization, the same axial load, radial load, and overturning moment are applied to both the reference and experimental main bearings. Axial load refers to the direction along the axis of the shaft, while radial load, perpendicular to it, is the direction along the radius of the shaft. The axial load of a bearing is the load generated along the axial direction of the bearing, which is the force that pushes the inner ring of the bearing outward from the outer ring. The radial load is the load acting perpendicular to the bearing's axis. The overturning moment is the moment that causes a self-propelled machine to tip over; it is the moment formed by the working load or a load partially outside the tipping line relative to the tipping line. The magnitude of the overturning moment is equal to the load that causes the overturning effect multiplied by the distance between the load's point of application and the tipping point.

[0061] like Figure 1 The load loading system shown is used to simulate the axial load, radial load, and overturning moment borne by the bearings during the actual excavation process of a full-face tunnel boring machine. After applying the values ​​of the load loading system, the corresponding actual pressure and flow rate signal values ​​can be obtained. Specifically, the load loading system includes an axial loading module, a radial loading module, and a monitoring module. The axial and radial loading modules are preferably loaded by hydraulic actuators. The monitoring module includes pressure monitoring elements and flow monitoring elements. The axial loading module applies axial load to the cross-section between the main and auxiliary annular loading frames. The radial loading module applies radial load symmetrically to the front and rear sides of the outer circle of the annular loading frame. The overturning moment is applied through the coordinated loading of the axial and radial loading modules. The monitoring module is used to detect the pressure and flow rate of the axial and radial loading sub-modules to obtain the real-time loading values ​​of axial load, mirror load, and overturning moment.

[0062] The actual pressure and flow rate signal values ​​collected by the monitoring module are fed back to the control system, and then the load value of the experimental main bearing is determined based on the relationship between the actual pressure and flow rate signal values ​​and the load setting value. It can be understood that the load setting value is a state parameter under different operating conditions, which can be converted into a corresponding load value or other signal quantity based on the relationship between the actual pressure and flow rate signal values ​​and the load setting value. The determination method here can be based on comparing the actual pressure and flow rate signal values ​​of the experimental main bearing with the set load setting value, or it can be based on comparing the actual pressure and flow rate signal values ​​of two main bearings with the set load setting value. As a preferred embodiment, the reference main bearing is added to the loading test experiment to provide reference values ​​under different operating conditions, another type of reference besides the set value. In this embodiment of the invention, the load value of the experimental main bearing can be determined based on the relationship between the actual pressure and flow rate signal values ​​of the reference main bearing and the load setting value.

[0063] This invention provides a comprehensive bearing loading test method applied to a main drive system. Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive system, serving as a reference bearing and an experimental bearing. The method includes: initializing the main drive system; applying the same axial load, radial load, and overturning moment to the reference and experimental bearings respectively to obtain the corresponding actual pressure and flow rate signal values; and determining the load value of the experimental bearing based on the relationship between the actual pressure and flow rate signal values ​​and the load setting value to achieve a comprehensive loading test under the same bearing loading conditions. This method can independently apply comprehensive loads to two sets of identical main bearings, conducting comparative studies under the same or different working conditions. By setting the same axial load, radial load, and overturning moment, it simulates the load values ​​borne by the bearings during the actual excavation process of a full-face tunnel boring machine, realizing the actual working conditions of the main drive bearings. Furthermore, it obtains accurate and effective data to guide the design and manufacturing of the main bearings, improving their reliability.

[0064] Based on the above embodiments, the initialization of the main drive device in step S11 includes:

[0065] Check the meshing and communication status of the transmission gears corresponding to the main drive device, the reference main bearing, and the experimental main bearing;

[0066] When both the engagement and communication states are normal, the main drive device initialization is considered complete.

[0067] Specifically, the initialization process involves monitoring the transmission status of the main drive unit and the two main bearings, as well as the communication status between the devices. Initialization is considered complete when both the meshing and communication statuses are normal. This invention is primarily based on the main bearing load test of a tunneling machine, and its initialization aims to ensure the normal operation of the main bearing and the main drive unit during the test. The initialization process includes both software and hardware initialization. Hardware initialization involves detecting the hardware parameters of each hardware device and the current transmission meshing status of the main drive unit. Software initialization involves checking the communication status between the various hardware devices and verifying whether the set values ​​of various variables are configured.

[0068] This invention provides a method for viewing the meshing and communication status of the transmission gears corresponding to the main drive device, the reference main bearing, and the experimental main bearing. When both the meshing and communication statuses are normal, the main drive device initialization is considered complete. This ensures the subsequent load testing experiments, guaranteeing that all devices function normally and that communication between them remains good.

[0069] Based on the above embodiments, step S13, determining the load value of the experimental main bearing according to the relationship between the actual pressure and flow rate signal value and the load setting value, includes:

[0070] The first actual pressure and flow rate signal value corresponding to the reference main bearing, the second actual pressure and flow rate signal value corresponding to the experimental main bearing, and the load setting value will be compared.

[0071] The load value of the experimental main bearing was adjusted based on the comparison results;

[0072] The adjusted load value was used as the load value for the experimental main bearing.

[0073] Specifically, the actual pressure and flow rate signal values ​​of the two main bearings are compared with the load setting value. In a preferred embodiment, the first actual pressure and flow rate signal value corresponding to the reference main bearing is compared with the load setting value. First, the two variables are converted into the same variable for comparison. If the load value converted by the reference main bearing is within the preset range of the load setting value, it indicates that the load value of the reference main bearing is the load value under the current working condition under normal operation. Then, the second actual pressure and flow rate signal value corresponding to the experimental main bearing is converted into the corresponding load value and compared with the load value of the reference main bearing again. If the load value of the experimental main bearing is higher than the load value of the reference main bearing, the load value of the experimental main bearing needs to be adjusted according to the load setting value.

[0074] Alternatively, the actual pressure and flow rate signal values ​​of the two main bearings can be converted into corresponding load values. The load value of the experimental main bearing can be compared with the load setting value. If they meet the requirements, the load value of the reference main bearing can be compared. If the load value of the experimental main bearing is higher than that of the reference main bearing, the load value of the experimental main bearing needs to be adjusted by adjusting the opening of the corresponding control valve according to the load setting value.

[0075] It is understandable that the adjustment process is a dynamic and precise adjustment, which is carried out in real time. In other words, the comparison process is carried out in real time to obtain the corresponding comparison results, thereby realizing closed-loop control of the load value.

[0076] This embodiment compares the first actual pressure and flow rate signal value corresponding to the reference main bearing, the second actual pressure and flow rate signal value corresponding to the experimental main bearing, and the load setting value; adjusts the load value of the experimental main bearing based on the comparison results; and uses the adjusted load value as the load loading value of the experimental main bearing. This achieves closed-loop control of the load value, obtains the desired load loading value, and is used to study the bearing's performance under different loading conditions.

[0077] Based on the above embodiments, Figure 1 The confining pressure simulation system is used to simulate the high confining pressure force exerted by the rock mass surrounding a deeply buried tunnel on the test bearing. It includes a circumferential loading module and a monitoring module. The circumferential loading module preferably applies the confining pressure through hydraulic servo actuators uniformly arranged on the inner side of the annular loading frame. The method also includes:

[0078] The same confining pressure was applied to the reference main bearing and the experimental main bearing respectively to obtain the actual pressure and flow rate signal values ​​corresponding to the reference main bearing and the experimental main bearing.

[0079] The actual confining pressure value of the experimental main bearing is determined based on the relationship between the actual pressure and flow rate signal value and the confining pressure setting value.

[0080] Specifically, confining pressure refers to the pressure exerted on a rock by the surrounding rock mass. At depths underground, the confining pressure is primarily due to the weight of the overlying rock, and is considered static rock pressure. The confining pressure of crustal rocks increases with depth, exhibiting a roughly linear relationship. By applying the same confining pressure value to both main bearings, the corresponding actual pressure-flow rate signal values ​​are obtained. It should be noted that these actual pressure-flow rate signals are acquired by the detection module and fed back to the control system. The relationship between these signals and the confining pressure setpoint determines the actual confining pressure value of the experimental main bearing. If a deviation exists, the opening of the corresponding control valve is adjusted. The method for determining the actual confining pressure value of the experimental main bearing can refer to the method for determining the load value of the experimental main bearing described above, and will not be repeated here.

[0081] This invention provides a method for applying the same confining pressure value to both a reference main bearing and an experimental main bearing to obtain the actual pressure-flow rate signal values ​​corresponding to the reference and experimental main bearings. The actual confining pressure value of the experimental main bearing is then determined based on the relationship between the actual pressure-flow rate signal values ​​and the confining pressure setpoint. This achieves closed-loop control of the confining pressure value, obtaining the desired confining pressure value for studying the bearing's performance under different high confining pressures.

[0082] Based on the above embodiments, Figure 1 The temperature simulation system in the test bearing is used to simulate the high-temperature force exerted by deep tunnel strata. It includes a circumferential heating module and a monitoring module. The circumferential heating module preferably applies temperature through temperature heating elements uniformly arranged on the inner side of the annular loading frame. The temperature heating elements are preferably resistance wires or electromagnetic coils. The monitoring module includes a temperature monitoring element for monitoring and feedback of the temperature. Therefore, the method includes:

[0083] The same temperature value is applied to both the reference main bearing and the experimental main bearing to obtain the current temperature values ​​corresponding to the reference main bearing and the experimental main bearing;

[0084] The actual temperature value of the experimental main bearing is determined based on the relationship between the current temperature value and the temperature setpoint.

[0085] By applying the same temperature value to both main bearings, the corresponding current temperature value is obtained. It should be noted that the current bearing temperature signal value is obtained from the detection module and fed back to the control system. The relationship between this signal and the confining pressure setting determines the actual temperature value of the experimental main bearing. If there is a deviation, the corresponding heating current and voltage values ​​are adjusted to control the temperature value. The method for determining the actual temperature value of the experimental main bearing can refer to the method for determining the load value of the experimental main bearing described above, and will not be repeated here.

[0086] This invention provides a method for applying the same temperature value to both a reference main bearing and an experimental main bearing to obtain their respective current temperature values. The actual temperature value of the experimental main bearing is then determined based on the relationship between the current temperature value and the set temperature value. This achieves closed-loop temperature control, obtaining the desired temperature value for studying the bearing's performance at different high temperatures.

[0087] Based on the above embodiments, the method further includes:

[0088] The same hydraulic medium pressure and flow rate are applied to the reference main bearing and the experimental main bearing respectively to obtain the corresponding signal values ​​of the reference main bearing and the experimental main bearing. The signal values ​​include at least the current pressure value, current flow rate value, current temperature value and current particle size of the reference main bearing and the experimental main bearing.

[0089] The actual hydraulic medium pressure and flow rate of the experimental main bearing are determined based on the relationship between the signal value and the hydraulic medium set value.

[0090] The same power torque value and power speed value are applied to the reference main bearing and the experimental main bearing respectively to obtain the torque speed signal values ​​corresponding to the reference main bearing and the experimental main bearing;

[0091] The actual torque and speed signal value of the experimental main bearing is determined based on the relationship between the torque and speed signal value and the torque and speed set value.

[0092] Specifically, by applying the same hydraulic medium pressure and flow rate to both main bearings, corresponding signal values ​​are obtained. It should be noted that these signal values ​​include at least the current pressure, flow rate, temperature, and particle size of the reference and experimental main bearings. The signal values ​​are obtained from the detection module and fed back to the control system to determine the actual hydraulic medium pressure and flow rate of the experimental main bearing based on their relationship with the hydraulic medium setpoint. If a deviation exists, the opening of the corresponding control valve is adjusted. The method for determining the actual hydraulic medium flow rate of the experimental main bearing is similar to the method for determining the load value of the experimental main bearing described above, and will not be repeated here.

[0093] In addition, by applying the same power torque and power speed values ​​to the two main bearings respectively, corresponding torque-speed signal values ​​are obtained. It should be noted that the torque-speed signal values ​​are obtained from the detection module and fed back to the control system. The relationship between this and the torque-speed setpoint determines the actual torque-speed signal value of the experimental main bearing. If there is a deviation, the opening of the corresponding potentiometer is adjusted. The method for determining the actual torque-speed signal value of the experimental main bearing can refer to the method for determining the load value of the experimental main bearing described above, and will not be repeated here.

[0094] The embodiments of this invention provide a determined actual hydraulic medium pressure and flow rate value for the experimental main bearing, ensuring that the lubrication medium temperature of the main drive system is within a set threshold, thus guaranteeing sufficient lubrication between the various transmission components of the main drive system. The determined actual torque and speed signal values ​​of the experimental main bearing are used to obtain the desired drive torque and speed, enabling both main bearings to operate under the same drive conditions.

[0095] Based on the above embodiments, the method further includes:

[0096] The test state of the experimental main bearing is determined by comprehensively analyzing the load value, actual confining pressure value, actual temperature value, actual hydraulic medium flow rate value, and actual torque and speed signal value of the experimental main bearing.

[0097] Specifically, the various variable parameters of the experimental main bearing determined in the above embodiments are comprehensively analyzed to determine its experimental state. Of course, the vibration, noise, and temperature of the two main bearings can also be monitored and compared in real time throughout the entire cycle. The real-time comparison analysis can use time-domain and / or frequency-domain eigenvalue comparison analysis. If the analysis results do not meet the design requirements, the current operating condition simulation experiment is stopped, and fault cause diagnosis analysis is performed. After the experiment, the experimental main bearing is disassembled from the main drive equipment for type testing. For example, the bearing's scratches and wear are inspected.

[0098] The comparative study of various variable parameters provided in the embodiments of the present invention facilitates a more realistic simulation of the comprehensive load, high confining pressure, and strong temperature rise environment borne by the bearings of tunnel boring machines in excavating adverse geological conditions, deep burial, and long tunnels. This is closer to the actual working conditions of the main bearings and is more beneficial for verifying the reliability of bearing performance.

[0099] The above describes in detail the various embodiments corresponding to the bearing comprehensive loading test method. Based on this, the present invention also discloses a bearing comprehensive loading test device corresponding to the above method. The device has two sets of main bearings of the same specifications installed back-to-back symmetrically on both sides of the main drive equipment, wherein the two sets of main bearings are a reference main bearing and an experimental main bearing. Figure 3 This is a structural diagram of a bearing comprehensive loading test device provided in an embodiment of the present invention. Figure 3 As shown, the bearing comprehensive loading test device includes:

[0100] Initialization module 11 is used to initialize the main drive device;

[0101] The processing module 12 is used to apply the same axial load, radial load and overturning moment to the reference main bearing and the experimental main bearing respectively, so as to obtain the actual pressure and flow signal values ​​corresponding to the reference main bearing and the experimental main bearing.

[0102] The determination module 13 is used to determine the load value of the experimental main bearing based on the relationship between the actual pressure and flow signal value and the load setting value, so as to realize the comprehensive load test of the bearing under the same loading conditions.

[0103] Since the embodiments of the device part correspond to the embodiments described above, please refer to the embodiments described in the method part for the embodiments of the device part, and will not be repeated here.

[0104] For a description of the bearing comprehensive loading test device provided by the present invention, please refer to the above method embodiment. The present invention will not be described again here, but it has the same beneficial effects as the above bearing comprehensive loading test method.

[0105] Figure 4 A structural diagram of a main drive device provided in an embodiment of the present invention is shown below. Figure 4 As shown, the device includes:

[0106] Memory 21 is used to store computer programs;

[0107] Processor 22 is used to execute computer programs to implement the steps of a test method for comprehensive bearing loading.

[0108] The bearing comprehensive loading test device provided in this embodiment may include, but is not limited to, an industrial computer.

[0109] The processor 22 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 22 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 22 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 22 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 22 may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0110] The memory 21 may include one or more computer-readable storage media, which may be non-transitory. The memory 21 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 21 is used to store at least the following computer program 211, which, after being loaded and executed by the processor 22, is capable of implementing the relevant steps of the bearing comprehensive loading test method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 21 may also include an operating system 212 and data 213, etc., and the storage method may be temporary storage or permanent storage. The operating system 212 may include Windows, Unix, Linux, etc. The data 213 may include, but is not limited to, the data involved in the bearing comprehensive loading test method, etc.

[0111] In some embodiments, the main drive device may further include a display screen 23, an input / output interface 24, a communication interface 25, a power supply 26, and a communication bus 27.

[0112] Those skilled in the field can understand, Figure 4 The structure shown does not constitute a limitation on the main drive device and may include more or fewer components than shown.

[0113] The processor 22 implements the bearing comprehensive loading test method provided in any of the above embodiments by calling the instructions stored in the memory 21.

[0114] For an introduction to the main drive device provided by the present invention, please refer to the above method embodiments. The present invention will not be described in detail here, but it has the same beneficial effects as the above-mentioned bearing comprehensive loading test method.

[0115] Furthermore, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by processor 22, implements the steps of the bearing comprehensive loading test method described above.

[0116] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0117] For an introduction to the computer-readable storage medium provided by the present invention, please refer to the above method embodiments. The present invention will not be described in detail here, but it has the same beneficial effects as the above-described bearing comprehensive loading test method.

[0118] As one embodiment, the present invention provides another testing device for comprehensive bearing loading. Figure 5 A structural diagram of another bearing comprehensive loading test device provided in an embodiment of the present invention is shown below. Figure 5As shown, the control system 1 includes a human-machine interface module 31, a data monitoring module 33, and a data monitoring module 32. The human-machine interface module 31 can be an industrial control computer, used to set state parameters under different working conditions. The data monitoring module 33 acquires the state parameters set by the human-machine interface module 31 and converts them into control signals to intelligently control the torque and speed of the power module 34, as well as the pressure, flow rate, and load values ​​of the hydraulic medium. The input end of the data monitoring module 32 is connected to each monitoring module of the bearing integrated loading test system, and the output end is connected to the human-machine interface module 31 through a wired or wireless network. It is used to collect test information during the test process and realize real-time comparative analysis of the states of two sets of main bearings of the same specification during the test. The main drive system 2 includes a power module 34, a transmission module 35, and a first monitoring module 36. The power module 34 can be electrically driven, hydraulically driven, or electrically hybrid driven. The transmission module can preferably be gear-driven. The first monitoring module 36 includes pressure monitoring elements, flow monitoring elements, and torque and speed detection elements. The power module 34 is connected to the transmission module 35. The power module 34 provides power to drive the transmission module 35 to rotate by engaging the test bearing 6. The first monitoring module 36 monitors and provides feedback on the medium pressure, flow rate, motor torque, and speed.

[0119] Figure 6 This is a schematic diagram of a lubrication and cooling system provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the lubrication and cooling system 3 includes a power element 37, a control element 38, an auxiliary element 39, and a second monitoring module 40. The power element 37 is preferably a hydraulic pump, the control element 38 is preferably a hydraulic valve, the auxiliary element 39 includes a hydraulic filter and an oil-water cooler, etc., and the second monitoring module 40 includes pressure monitoring elements, flow monitoring elements, temperature monitoring elements, and oil monitoring elements. The power element 37 drives the cooling medium through the control element 38 to regulate the pressure and flow rate of the cooling medium. The temperature of the cooling medium in the main drive system 2 is controlled by the temperature of the cooling medium through the hydraulic filter and oil-water cooler in the auxiliary element 39. The second monitoring module 40 monitors and provides feedback on the medium pressure, flow rate, temperature, and performance.

[0120] Figure 7 This is a schematic diagram of the structure of an environmental simulation system provided in an embodiment of the present invention, such as... Figure 7 As shown, the environmental simulation system 4 includes a load loading system 43, a confining pressure simulation system 42, and a temperature simulation system 41. The load loading system 43 simulates the axial load, radial load, and overturning moment borne by the bearing during the actual excavation process of a full-face tunnel boring machine. The confining pressure simulation system 42 simulates the high confining pressure exerted on the test bearing by the surrounding rock mass of a deep-buried tunnel. The temperature simulation system 41 simulates the high-temperature force exerted on the test bearing by the strata of a deep, long tunnel.

[0121] Figure 8 This is a schematic diagram of the structure of a monitoring system provided in an embodiment of the present invention, such as... Figure 8 As shown, the monitoring system 5 is used to monitor the entire process of the bearing integrated loading test system. It includes a deformation monitoring module 47, a vibration monitoring module 46, a temperature monitoring module 45, and a noise monitoring module 44. The deformation monitoring module 47 monitors the deformation of the test bearing 6 and the flange, using strain gauges, eddy current sensors, and laser displacement sensors. The vibration monitoring module 46 monitors the vibration of the test bearing 6 and the support, using acceleration sensors. The temperature monitoring module 45 monitors the temperature of the test bearing 6, using temperature sensors. The noise monitoring module 44 monitors the noise of the test bearing 6, using noise sensors. The test bearings 6 are all bearings of the same specification, symmetrically installed inside the main drive system. The main mechanical structure 7 provides support for the bearing integrated loading test system, including structural components such as the annular loading frame, flange, and support. The annular loading frame is positioned relative to the ground through the support components and the radial loading module.

[0122] Therefore, Figures 5 to 8 For a description of another bearing comprehensive loading test device, lubrication and cooling system, environmental simulation system and monitoring system provided by the present invention, please refer to the above method embodiments. The present invention will not be described again here, but it has the same beneficial effects as the above bearing comprehensive loading test method.

[0123] The present invention has provided a detailed description of a bearing comprehensive loading test method, a bearing comprehensive loading test device, and a medium. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0124] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A test method for comprehensive bearing loading, characterized in that, Applied to a main drive system, two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive system, wherein the two sets of main bearings are a reference main bearing and an experimental main bearing. The method includes: Initialize the main drive device; The same axial load, radial load, and overturning moment are applied to the reference main bearing and the experimental main bearing respectively to obtain the actual pressure and flow signal values ​​corresponding to the reference main bearing and the experimental main bearing; wherein, by setting the same axial load, radial load, and overturning moment, the load loading value borne by the bearing during the actual excavation process of the full-face tunnel boring machine is simulated. The load value of the experimental main bearing is determined based on the relationship between the actual pressure and flow signal value and the load setting value in order to achieve a comprehensive load test of the experimental main bearing under the same loading conditions. The step of determining the load value of the experimental main bearing based on the relationship between the actual pressure-flow rate signal value and the load setting value includes: The first actual pressure and flow rate signal value corresponding to the reference main bearing, the second actual pressure and flow rate signal value corresponding to the experimental main bearing, and the load setting value are compared. The load value of the experimental main bearing was adjusted based on the comparison results; The adjusted load value is used as the load loading value of the experimental main bearing; Correspondingly, it also includes: The same hydraulic medium pressure and flow rate are applied to the reference main bearing and the experimental main bearing respectively to obtain the corresponding signal values ​​of the reference main bearing and the experimental main bearing. The signal values ​​include at least the current pressure value, current flow rate value, current temperature value and current particle size of the reference main bearing and the experimental main bearing. The actual hydraulic medium pressure and flow rate of the experimental main bearing are determined based on the relationship between the signal value and the hydraulic medium set value. Correspondingly, it also includes: The test state of the experimental main bearing is determined by comprehensively analyzing the load value, actual confining pressure value, actual temperature value, actual hydraulic medium flow rate value, and actual torque and speed signal value of the experimental main bearing.

2. The bearing comprehensive loading test method according to claim 1, characterized in that, The initialization of the main drive device includes: Check the meshing and communication status of the transmission gears corresponding to the main drive device, the reference main bearing, and the experimental main bearing; When both the engagement state and the communication state are in a normal state, the initialization of the main drive device is determined to be complete.

3. The bearing comprehensive loading test method according to claim 2, characterized in that, Also includes: The same confining pressure value is applied to the reference main bearing and the experimental main bearing respectively to obtain the actual pressure and flow rate signal values ​​corresponding to the reference main bearing and the experimental main bearing; The actual confining pressure value of the experimental main bearing is determined based on the relationship between the actual pressure and flow rate signal value and the confining pressure setting value.

4. The bearing comprehensive loading test method according to claim 1 or 3, characterized in that, Also includes: The same temperature value is applied to the reference main bearing and the experimental main bearing respectively to obtain the current temperature values ​​corresponding to the reference main bearing and the experimental main bearing; The actual temperature value of the experimental main bearing is determined based on the relationship between the current temperature value and the temperature setpoint.

5. The bearing comprehensive loading test method according to claim 4, characterized in that, Also includes: The same power torque value and power speed value are applied to the reference main bearing and the experimental main bearing respectively to obtain the torque speed signal values ​​corresponding to the reference main bearing and the experimental main bearing; The actual torque and speed signal value of the experimental main bearing is determined based on the relationship between the torque and speed signal value and the torque and speed set value.

6. A test device for comprehensive bearing loading, characterized in that, Two sets of identical main bearings are symmetrically installed back-to-back on both sides of the main drive equipment, wherein the two sets of main bearings are a reference main bearing and an experimental main bearing. The device includes: An initialization module is used to initialize the main drive device; An application processing module is used to apply the same axial load, radial load, and overturning moment to the reference main bearing and the experimental main bearing, respectively, to obtain the actual pressure and flow signal values ​​corresponding to the reference main bearing and the experimental main bearing; wherein, by setting the same axial load, radial load, and overturning moment, the load loading value borne by the bearing during the actual excavation process of the full-face tunnel boring machine is simulated. The determination module is used to determine the load loading value of the experimental main bearing based on the relationship between the actual pressure and flow signal value and the load setting value, so as to realize the comprehensive load test of the experimental main bearing under the same loading conditions. The step of determining the load value of the experimental main bearing based on the relationship between the actual pressure-flow rate signal value and the load setting value includes: The first actual pressure and flow rate signal value corresponding to the reference main bearing, the second actual pressure and flow rate signal value corresponding to the experimental main bearing, and the load setting value are compared. The load value of the experimental main bearing was adjusted based on the comparison results; The adjusted load value is used as the load loading value of the experimental main bearing; Correspondingly, it also includes: The same hydraulic medium pressure and flow rate are applied to the reference main bearing and the experimental main bearing respectively to obtain the corresponding signal values ​​of the reference main bearing and the experimental main bearing. The signal values ​​include at least the current pressure value, current flow rate value, current temperature value and current particle size of the reference main bearing and the experimental main bearing. The actual hydraulic medium pressure and flow rate of the experimental main bearing are determined based on the relationship between the signal value and the hydraulic medium set value. Correspondingly, it also includes: The test state of the experimental main bearing is determined by comprehensively analyzing the load value, actual confining pressure value, actual temperature value, actual hydraulic medium flow rate value, and actual torque and speed signal value of the experimental main bearing.

7. A main drive device, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the bearing comprehensive loading test method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the bearing comprehensive loading test method as described in any one of claims 1 to 5.

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