Heavy-load high-rotating-speed frictional wear detection device and detection method thereof

Abstract

The invention relates to a heavy-load high-rotating-speed frictional wear detection device and a detection method thereof, and the heavy-load high-rotating-speed frictional wear detection device is characterized in that on the basis that an existing rotating shaft is matched with a workbench, a rotation driving module is arranged to drive the rotating shaft to drive a disc sample to rotate after the disc sample is installed on the rotating shaft. Meanwhile, the loading device is arranged, the clamp detachably matched with the pin sample is arranged on the loading device, the loading device is arranged to load the pin sample in a fuzzy PID control mode, and then the stability of the applied load can be guaranteed. Besides, a result module is arranged to obtain a friction sound signal when the pin sample and the disc sample are rubbed, and the wear volume of the disc sample in the friction wear process can be obtained by utilizing a sound emission signal, so that the requirement of monitoring the wear condition of the sample on line in real time can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of friction and wear detection, and in particular to a heavy-load and high-speed friction and wear detection device and a detection method thereof. Background Art

[0002] For modern mechanical equipment using sliding and rolling contact surfaces, friction and wear are the main causes of energy consumption and material failure. In national defense construction and the production of modern mechanical products, various mechanical parts and tools will wear out during the process of contact and relative movement with the processing objects. Severe wear of materials will affect the quality, performance and life of mechanical equipment, and thus affect the sales of equipment. Therefore, research on wear measurement technology is of great significance to improve the life and reliability of equipment and tools and promote the sustainable development of the industry.

[0003] In the prior art, wear volume measurement technologies mainly include offline measurement methods and online measurement methods. The offline measurement method is a type of wear volume measurement method that determines the wear volume of the sample by disassembling the sample in the wear test or suspending the test, cleaning it, and analyzing the sample morphology using tools such as a scanning electron microscope. Common offline wear volume measurement methods include: wear weighing method, three-dimensional morphology measurement method, direct measurement method, etc. However, although the offline measurement method can obtain the wear condition of the sample at a certain moment, it needs to be carried out in an offline environment, so it is impossible to monitor and analyze the wear behavior of the sample in real time. In addition, disassembly will cause clamping errors, thereby reducing the measurement results and accuracy.

[0004] The online measurement method refers to the use of measurement modules installed on equipment or parts to monitor changes in wear status in real time during the operation of the friction and wear testing machine. Online wear measurement has the characteristics of strong real-time performance, high accuracy, and no need to stop the machine. It can obtain the wear condition of the sample in real time. At present, online wear volume measurement technologies mainly include acoustic wear measurement method, wear particle measurement method, and temperature wear measurement method. However, since this method requires real-time capture and analysis of wear particles during the test, it has high requirements for test conditions. For example, the generation, transmission, and collection of wear particles need to be carefully controlled to avoid interfering with the normal formation and collection of wear particles. Therefore, it is not often used in the field of tribology research of friction and wear testing machines. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to measure the wear of mechanical equipment to achieve the technical effect of stable load application and real-time monitoring. In order to overcome the defects of the above-mentioned prior art, the present invention provides a heavy-load and high-speed friction and wear detection device and a detection method thereof, including a heavy-load and high-speed friction and wear detection device and a heavy-load and high-speed friction and wear detection device detection method.

[0006] The present invention provides a heavy-load high-speed friction and wear detection device, comprising a workbench provided with a mounting hole and a rotating shaft with a connection portion detachably matched with a disc sample on the top, wherein the bottom of the rotating shaft is rotatably connected to the mounting hole, and further comprising:

[0007] A rotation driving module, connected to the rotating shaft, and used for driving the rotating shaft to rotate around its axis;

[0008] A loading device, on which a fixture is provided that is detachably matched with the pin sample, and is used to make the pin sample contact with the disk sample, and to load the pin sample through a fuzzy PID control method;

[0009] The result module is used to obtain the friction sound signal when the pin sample and the disk sample rub against each other, and to extract the time domain features of the friction sound signal after noise reduction through wavelet packet analysis to obtain the wear information of the disk sample.

[0010] In view of the above problems, the heavy-loaded and high-speed friction and wear detection device disclosed in the present invention is based on the existing matching of the rotating shaft and the workbench, and a driving module is set to realize that after the disk sample is installed on the rotating shaft, the rotating shaft drives the disk sample to rotate. At the same time, a loading device is set, on which a clamp that can be detachably matched with the pin sample is provided, and the loading device is set to load the pin sample using a fuzzy PID control method, thereby ensuring the stability of the applied load. In addition, a result module is set to obtain a friction sound signal when the pin sample and the disk sample rub against each other, and the wear volume of the disk sample during the friction and wear process can be obtained using the acoustic emission signal, thereby meeting the demand for online real-time monitoring of the sample wear. Therefore, the heavy-loaded and high-speed friction and wear detection device disclosed in the present invention can not only apply heavy-load and high-speed pin-disk friction, but also measure the wear amount in real time, providing an important basis for mastering the friction and wear performance of materials under actual working conditions and improving the service life of workpieces.

[0011] In a possible implementation, the driving module includes:

[0012] A driving mechanism for providing a rotational driving force;

[0013] A transmission mechanism, used for transmitting the rotational driving force provided by the driving mechanism to the rotating shaft to rotate the rotating shaft;

[0014] in,

[0015] The transmission mechanism is connected to the driving mechanism and the rotating shaft respectively.

[0016] Since both ends of the rotating shaft are connected to corresponding components, it is impossible to directly drive its rotation through a driving device such as a motor. However, the above method is adopted, and the transmission mechanism is used as a transmission bridge to transmit the rotational driving force provided by the driving mechanism to the rotating shaft, which can ensure that the driving of the rotating shaft is feasible and controllable.

[0017] In a possible implementation, the driving mechanism includes a fixed plate and a servo motor connected to the fixed plate; this solution can further achieve closed-loop control and high-efficiency control of the driving rotation of the rotating shaft.

[0018] In a possible embodiment, the transmission mechanism includes a driving gear, a first tooth structure and a conveyor belt having a second tooth structure thereon, the driving gear is connected to the output shaft of the servo motor, the first tooth structure is arranged around the rotating shaft, and the second tooth structure on the conveyor belt is respectively meshed with the first tooth structure and the driving gear; the rotating shaft, the driving gear and the conveyor belt form a gear-type belt transmission structure under the meshing of the tooth structure, which can efficiently transmit the rotational driving force provided by the driving mechanism to the rotating shaft, thereby realizing high-speed operation of the rotating shaft.

[0019] In a possible implementation, the loading device includes:

[0020] A loading force sensor, used to obtain force information of elastic force and / or friction force applied to the pin sample;

[0021] A hydraulic loader, used for performing load loading on the pin specimen according to an execution instruction;

[0022] A controller, used for receiving the force information obtained by the loading force sensor, and forming the execution instruction for the hydraulic loader to execute the next loading step according to the force information through a fuzzy PID control algorithm;

[0023] The controller is set up to realize the fuzzy PID control method to ensure the stability of the applied load. At the same time, the hydraulic loader is set up to realize the hydraulic loading method to apply a large load (greater than 200N) to the pin specimen, which can better ensure its stability.

[0024] In a possible implementation, the result module includes:

[0025] A first acoustic emission sensor, used to obtain the friction sound signal;

[0026] a second acoustic emission sensor, used to obtain a verification signal for verifying a coupling state and a working state of the first acoustic emission sensor;

[0027] A preamplifier, used to perform signal amplification processing on the friction sound signal and the verification signal respectively to obtain amplified signals;

[0028] A data acquisition card, used for performing analog-to-digital conversion on the amplified signal obtained by the preamplifier to obtain digital information;

[0029] a recording and analyzing device for obtaining wear information of the disc sample based on the digital information;

[0030] A display device, used to display the wear information of the disc sample;

[0031] in,

[0032] The first acoustic emission sensor and the second acoustic emission sensor are both arranged on a connecting portion arranged at the top of the rotating shaft;

[0033] The preamplifier is electrically connected to the first acoustic emission sensor and the second acoustic emission sensor, the data acquisition card is electrically connected to the preamplifier, the recording and analysis device is electrically connected to the data acquisition card, and the display device is electrically connected to the recording and analysis device;

[0034] The second acoustic emission sensor is set up on the premise of setting up the first acoustic emission sensor to verify the coupling state and working state of the first acoustic emission sensor, which can ensure the validity and reliability of the acoustic emission signal collected by the first acoustic emission sensor. In addition, the first acoustic emission sensor converts the mechanical wave signal of the sound wave into a voltage signal, and then transmits the amplified signal to the data acquisition card through the preamplifier to complete the analog-to-digital conversion, and then the acoustic emission signal is processed by the recording and analysis device and recorded, analyzed and displayed by the display device, thereby achieving the purpose of detecting the acoustic emission source.

[0035] In a possible implementation, the connections between the first acoustic emission sensor, the second acoustic emission sensor and the disk sample are sealed by a coupling agent; this solution can avoid the presence of trace amounts of air at the contact interface that affects the penetration of sound waves while reducing energy reflection losses at the interface.

[0036] In a possible implementation manner, the record analysis device is configured to obtain the wear information of the disk sample by performing the following steps:

[0037] A1: preprocessing abnormal data that generates baseline drift in the digital information by using a total variation noise reduction filtering method to obtain a preprocessing result;

[0038] A2: performing noise reduction processing on the preprocessing result by wavelet packet analysis to obtain a noise-reduced acoustic emission signal;

[0039] A3: extracting time domain features from the de-noised acoustic emission signal using a feature extraction algorithm to obtain time domain features;

[0040] A4: Based on the time domain characteristics, the average value and energy data are used as wear status evaluation indicators, and the wear information is obtained by comparing the changes in the time domain characteristics of the average value and energy under different process parameters;

[0041] This solution is more reasonable and accurate in obtaining the wear volume of the disc sample during the friction and wear process through the acoustic emission signal, thereby further meeting the needs of online real-time monitoring of the sample wear and ensuring the reliability of the test results.

[0042] In a possible implementation, the loading force sensor is also electrically connected to the display device; thereby enabling the display device to display force information while displaying wear information, thereby facilitating a comprehensive evaluation of wear detection results.

[0043] Another technical solution of the present invention is to provide a detection method for a heavy-load high-speed friction and wear detection device, the method comprising the following steps:

[0044] S1: Install the disc sample on the connection portion provided on the rotating shaft, and install the pin sample on the fixture provided on the loading device, so that the pin sample contacts the disc sample;

[0045] S2: Loading the pin sample with a load by means of a fuzzy control method through the loading device, and driving the rotating shaft to rotate around its axis through a driving module;

[0046] S3: Obtain the friction sound signal of the friction between the pin sample and the disk sample through the result module, and extract the time domain features of the friction sound signal after noise reduction through wavelet packet analysis to obtain the wear information of the disk sample.

[0047] The method disclosed in the present invention, after installing the disk sample and the pin sample, loads the pin sample in a fuzzy control manner through a loading device, drives the rotating shaft to rotate around its axis through a driving module, and then obtains wear information through an acoustic signal processing method through a result module, which not only ensures that heavy-load and high-speed pin-disk friction can be applied, but also can measure the wear amount in real time, providing an important basis for mastering the friction and wear performance of materials under actual working conditions and improving the service life of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of a heavy-load and high-speed friction and wear detection device disclosed in an embodiment of the present invention;

[0049] Figure 2It is a structural cross-sectional view of a heavy-load and high-speed friction and wear detection device disclosed in an embodiment of the present invention;

[0050] Figure 3 It is a schematic diagram of the structure of the loading device disclosed in the embodiment of the present invention;

[0051] Figure 4 It is a schematic diagram of the structure of the result module disclosed in the embodiment of the present invention;

[0052] Figure 5 is an operation flow chart of the record analysis device disclosed in the embodiment of the present invention;

[0053] Figure 6 It is a flow chart of the method disclosed in the embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 1. Workbench, 2. Disc sample, 3. Rotating shaft, 4. Driving module, 41. Driving mechanism, 411. Fixed plate, 412. Servo motor, 42. Transmission mechanism, 421. Conveyor belt, 5. Loading device, 51. Loading force sensor, 52. Hydraulic loader, 53. Controller, 54. Shell, 6. Pin sample, 7. Result module, 71. First acoustic emission sensor, 72. Second acoustic emission sensor, 73. Preamplifier, 74. Data acquisition card, 75. Recording and analysis device, 76. Display device, 8. Base. DETAILED DESCRIPTION

[0056] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0057] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0058] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "electrical connection" and "electrical connection relationship" should be understood in a broad sense, that is, referring to a connection method with an electrical relationship, for example, it can be a circuit connection through a conductive wire, or it can be an electrical connection through a radio signal channel (channel), or a combination of the two. In addition, "electrical connection" and "electrical connection relationship" can be based on mechanical connection (such as a conductive wire set in a connecting key); it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0059] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] See also Figure 1 to Figure 6 As shown, the embodiment of the present application discloses a heavy-load high-speed friction and wear detection device, comprising a workbench 1 fixedly connected with a mounting hole and a rotating shaft 3 with a connection portion detachably matched with a disc sample 2 on the top, and the bottom of the rotating shaft 3 is rotatably connected to the mounting hole. In addition, the device further comprises a driving module 4, a loading device 5, a result module 7 and a base 8. Figure 1 and Figure 2 As shown, the workbench 1 is arranged on the base 8, the driving module 4 is connected to the rotating shaft 3, and the loading device 5 is provided with a fixture that can be detachably matched with the pin sample 6 so that the pin sample 6 can be installed on the fixture.

[0062] In the device, the driving module 4 is used to drive the rotating shaft 3 to rotate around its axis; the loading device 5 is used to make the pin sample 6 contact with the disk sample 2, and load the pin sample 6 through fuzzy PID control; the result module 7 is used to obtain the friction sound signal when the pin sample 6 and the disk sample 2 rub against each other, and extract the time domain features of the friction sound signal after noise reduction processing through wavelet packet analysis to obtain the wear information of the disk sample 2.

[0063] Please continue to see Figure 1 and Figure 2As shown, in this embodiment, the driving module 4 includes a driving mechanism 41 and a transmission mechanism 42, wherein the transmission mechanism 42 is respectively connected to the driving mechanism 41 and the rotating shaft 3. In the driving module 4, the driving mechanism 41 is used to provide a rotational driving force; the transmission mechanism 42 is used to transmit the rotational driving force provided by the driving mechanism 41 to the rotating shaft 3 to rotate the rotating shaft 3.

[0064] Please continue to see Figure 1 and Figure 2 As shown, in this embodiment, the driving mechanism 41 includes a fixed plate 411 and a servo motor 412 connected to the fixed plate 411, and the fixed plate 411 is connected to the base 8, and the output shaft of the servo motor 412 faces downward. The transmission mechanism 42 includes a driving gear (not shown), a first tooth structure (not shown) and a conveyor belt 421 on which a second tooth structure (not shown) is provided. The rotating shaft of the driving gear is arranged in the vertical direction, and one end of the rotating shaft is connected to the output shaft of the servo motor 412. The first tooth structure is arranged around the rotating shaft 3, and the second tooth structure on the conveyor belt 421 is respectively meshed with the first tooth structure and the driving gear. As a result, the rotating shaft, the driving gear and the conveyor belt form a gear-type belt transmission structure under the meshing of the tooth structure, thereby realizing the efficient transmission of the rotational driving force provided by the servo motor 412 to the rotating shaft 3, which helps to realize the high-speed operation of the rotating shaft 3.

[0065] See also Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the loading device 5 is a constant loading device, and in order to meet the actual working conditions, a hydraulic loading method is selected to load a large load on the sample. The loading device 5 includes a loading force sensor 51, a hydraulic loader 52, a controller 53, and a housing 54 for accommodating the loading force sensor 51, the hydraulic loader 52, and the controller 53, wherein the loading force sensor 51, the hydraulic loader 52, and the controller 53 are electrically connected to form a closed loop, i.e., a closed loop structure, and a fixture for mounting the pin sample 6 is arranged on the housing 54, and a loading channel is opened on the housing 54 for facilitating the hydraulic loader 52 to load the load.

[0066] In the loading device 5, the loading force sensor 51 is a resistance strain type force sensor, which can be set at the interface of the loading device 5 to contact the pin sample 6. The loading force sensor 51 is used to obtain the force information of the elastic force and / or friction force on the pin sample 6. The hydraulic loader 52 is used to load the pin sample 6 according to the execution instruction. In order to ensure the stability of the applied load, the control model set in the controller is a model controlled by a fuzzy PID control algorithm. The controller 53 is used to receive the force information obtained by the loading force sensor 51, and form an execution instruction for the hydraulic loader 52 to perform the next step of loading according to the force information through the fuzzy PID control algorithm.

[0067] See also Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the result module 7 includes a first acoustic emission sensor 71, a second acoustic emission sensor 72, a preamplifier 73, a data acquisition card 74, a recording and analysis device 75 and a display device 76. Among them, one end of the first acoustic emission sensor 71 and the second acoustic emission sensor 72 is connected to the disc sample 2 through a coupling agent, and the other end is fixed to the rotating shaft 3 through a mounting portion installed in the rotating shaft 3. The preamplifier 73 is electrically connected to the first acoustic emission sensor 71 and the second acoustic emission sensor 72, the data acquisition card 74 is electrically connected to the preamplifier 73, the recording and analysis device 75 is electrically connected to the data acquisition card 74, and the display device 76 is electrically connected to the recording and analysis device 75. For specific connection relationships, see Figure 4 shown.

[0068] Please continue to see Figure 4 As shown, in the result module 7, the first acoustic emission sensor 71 is used to obtain the friction sound signal. The second acoustic emission sensor 72 is used to obtain a verification signal for verifying the coupling state and working state of the first acoustic emission sensor 71, so as to ensure the validity and reliability of the acoustic emission signal collected by the first acoustic emission sensor 71. The preamplifier 73 is used to perform signal amplification processing on the friction sound signal and the verification signal respectively to obtain an amplified signal. The data acquisition card 74 is used to perform analog-to-digital conversion on the amplified signal obtained by the preamplifier 73 to obtain digital information. The recording and analysis device 75 is used to obtain the wear information of the disk sample 2 based on the digital information. The display device 76 is used to display the wear information of the disk sample 2. The display device 76 is also electrically connected to the loading force sensor 51, so that the display device 76 can display the force information and the wear information in a dual manner, which is conducive to making a more accurate and comprehensive evaluation of the wear condition of the disk sample 2.

[0069] In this embodiment, the first acoustic emission sensor 71 and the second acoustic emission sensor 72 are both high-frequency bandwidth piezoelectric acoustic emission sensors, and both can convert acoustic wave signals into voltage signals. At this point, the first acoustic emission sensor 71 and the second acoustic emission sensor 72 convert the mechanical wave signal of the acoustic wave into a voltage signal, and then transmit the amplified signal to the data acquisition card 74 through the preamplifier 73 to complete the analog-to-digital conversion, and then the acoustic emission signal is processed by the recording and analysis device 75 and recorded, analyzed and displayed by the display device 76, thereby achieving the purpose of detecting the acoustic emission source.

[0070] See also Figure 5As shown, in this embodiment, the recording and analysis device 75 is configured to obtain the wear information of the disk sample 2 by executing the following steps: A1: preprocessing the abnormal data that produces baseline drift in the digital information by the total variation noise reduction filtering method to obtain the preprocessing result; A2: performing noise reduction processing on the preprocessing result by the wavelet packet analysis method to obtain the acoustic emission signal after noise reduction; A3: extracting the time domain features of the acoustic emission signal after noise reduction by the feature extraction algorithm to obtain the time domain features; A4: based on the time domain features, taking the average value and energy data as the wear status evaluation indicators, the wear information of the disk sample 2 is obtained by comparing the changes in the time domain characteristics of the average value and energy under different process parameters.

[0071] The detection method using the device will be further disclosed below. Figure 6 As shown, the method comprises the following steps:

[0072] S1: Install the disc sample 2 on the connection portion fixedly connected to the rotating shaft 3, install the pin sample 6 on the fixture provided on the loading device 5, and make the pin sample 6 contact with the disc sample 2.

[0073] S2: The pin sample 6 is loaded by the loading device 5 in a fuzzy control manner, and the rotating shaft 3 is driven to rotate around its axis by the driving module 4.

[0074] Specifically, during the operation of the loading device 5, the pin sample 6 is loaded by controlling the hydraulic loader 52, and then the force information of the elastic force and / or friction force on the pin sample 6 is obtained through the loading force sensor 51, and then the force information obtained by the loading force sensor 51 is received by the controller 53, and the fuzzy PID control algorithm is used to form an execution instruction for the hydraulic loader 52 to perform the next loading according to the force information, so that the hydraulic loader 52 can load the pin sample 6 according to the instruction. When the driving module 4 is controlled, the servo motor 412 is controlled to rotate to drive the rotating shaft 3 to rotate.

[0075] S3: The friction sound signal of the pin sample 6 and the disk sample 2 is obtained through the result module 7, and the time domain feature extraction of the friction sound signal after noise reduction is performed through the wavelet packet analysis method to obtain the wear information of the disk sample 2.

[0076] The specific method is as follows: the mechanical wave signal of the sound wave is converted into a voltage signal through the first acoustic emission sensor 71 and the second acoustic emission sensor 72, and then the signal is amplified by the preamplifier 73 and the amplified signal is transmitted to the data acquisition card 74 to complete the analog-to-digital conversion, and then the acoustic emission signal is processed by the recording and analysis device 75 and recorded, analyzed and displayed by the display device 76, so as to achieve the purpose of detecting the acoustic emission source.

[0077] The heavy-load and high-speed friction and wear detection device disclosed in this embodiment, based on the existing matching of the rotating shaft 3 and the workbench 1, is provided with a driving module 4 to realize the installation of the disk sample 2 on the rotating shaft 3 and drive the rotating shaft 3 to drive the disk sample 2 to rotate. By setting a loading device 5, a fixture that can be detachably matched with the pin sample 6 is provided on it, and the loading device 5 is configured to load the pin sample 6 using a fuzzy PID control method, thereby ensuring the stability of the applied load. In addition, by setting a result module 7 to obtain a friction sound signal when the pin sample 6 and the disk sample 2 rub against each other, the wear volume of the disk sample 2 during the friction and wear process can be obtained using the acoustic emission signal, thereby meeting the requirements of online real-time monitoring of the sample wear. Therefore, the device can not only apply heavy-load and high-speed pin-disk friction, but also measure the wear amount in real time, providing an important basis for mastering the friction and wear performance of materials under actual working conditions and improving the service life of workpieces.

[0078] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0079] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A heavy-load high-speed friction and wear detection device, comprising a workbench (1) provided with a mounting hole and a rotating shaft (3) with a connection portion detachably matched with a disc sample (2) on the top, wherein the bottom of the rotating shaft (3) is rotatably connected to the mounting hole, characterized in that: Also includes: A rotation driving module (4), connected to the rotating shaft (3), and used for driving the rotating shaft (3) to rotate around its axis; A loading device (5) is provided with a fixture that can be detachably matched with the pin sample (6), and is used to make the pin sample (6) contact with the disk sample (2), and to load the pin sample (2) through a fuzzy PID control method; The result module (7) is used to obtain a friction sound signal when the pin sample (6) and the disk sample (2) rub against each other, and to extract time domain features of the friction sound signal after noise reduction processing by wavelet packet analysis to obtain wear information of the disk sample (2).

2. The heavy-load and high-speed friction and wear detection device according to claim 1 is characterized in that: The driving module (4) comprises: A driving mechanism (41) for providing a rotational driving force; a transmission mechanism (42) for transmitting the rotational driving force provided by the driving mechanism (41) to the rotating shaft (3) so as to rotate the rotating shaft (3); in, The transmission mechanism (42) is connected to the driving mechanism (41) and the rotating shaft (3) respectively.

3. The heavy-load and high-speed friction and wear detection device according to claim 2 is characterized in that: The driving mechanism (41) comprises a fixing plate (411) and a servo motor (412) connected to the fixing plate (411).

4. The heavy-load and high-speed friction and wear detection device according to claim 3 is characterized in that: The transmission mechanism (42) comprises a driving gear, a first tooth structure and a conveyor belt (421) on which a second tooth structure is provided, the driving gear is connected to the output shaft of the servo motor (412), the first tooth structure is arranged around the rotating shaft (3), and the second tooth structure on the conveyor belt (421) is respectively meshed with the first tooth structure and the driving gear.

5. The heavy-load and high-speed friction and wear detection device according to any one of claims 1 to 4, characterized in that: The loading device (5) comprises: A loading force sensor (51) for obtaining force information of elastic force and / or friction force applied to the pin sample (6); A hydraulic loader (52) for performing load loading on the pin sample (6) according to an execution instruction; The controller (53) is used to receive the force information obtained by the loading force sensor (51), and to form the execution instruction for the hydraulic loader (52) to execute the next loading step according to the force information through a fuzzy PID control algorithm.

6. The heavy-load and high-speed friction and wear detection device according to claim 5, characterized in that: The result module (7) comprises: A first acoustic emission sensor (71), used for acquiring the friction sound signal; a second acoustic emission sensor (72), used for acquiring a verification signal for verifying a coupling state and a working state of the first acoustic emission sensor (71); A preamplifier (73) is used to perform signal amplification processing on the friction sound signal and the verification signal respectively to obtain an amplified signal; A data acquisition card (74) is used to perform analog-to-digital conversion on the amplified signal obtained by the preamplifier (73) to obtain digital information; A recording and analyzing device (75) for obtaining wear information of the disk sample (2) based on the digital information; A display device (76) for displaying wear information of the disc sample (2); in, The first acoustic emission sensor (71) and the second acoustic emission sensor (72) are both arranged on a connecting portion arranged at the top of the rotating shaft (3); The preamplifier (73) is electrically connected to the first acoustic emission sensor (71) and the second acoustic emission sensor (72), the data acquisition card (74) is electrically connected to the preamplifier (73), the recording and analysis device (75) is electrically connected to the data acquisition card (74), and the display device (76) is electrically connected to the recording and analysis device (75).

7. The heavy-load and high-speed friction and wear detection device according to claim 6, characterized in that: The connections between the first acoustic emission sensor (71), the second acoustic emission sensor (72) and the disc sample (2) are all sealed by a coupling agent.

8. The heavy-load and high-speed friction and wear detection device according to claim 7, characterized in that: The record analysis device (75) is configured to obtain the wear information of the disk sample (2) by performing the following steps: A1: preprocessing abnormal data that generates baseline drift in the digital information by using a total variation noise reduction filtering method to obtain a preprocessing result; A2: performing noise reduction processing on the preprocessing result by wavelet packet analysis to obtain a noise-reduced acoustic emission signal; A3: extracting time domain features from the de-noised acoustic emission signal using a feature extraction algorithm to obtain time domain features; A4: Based on the time domain characteristics, the average value and energy data are used as wear status evaluation indicators, and the wear information is obtained by comparing the changes in the time domain characteristics of the average value and energy under different process parameters.

9. The heavy-load and high-speed friction and wear detection device according to any one of claims 6 to 8, characterized in that: The loading force sensor (51) is also electrically connected to the display device (76).

10. A method for detecting a heavy-load and high-speed friction and wear detection device, characterized in that: The heavy-load and high-speed friction and wear detection device applicable to any one of claims 1 to 9 comprises the following steps: S1: Install the disk sample (2) on the connection portion provided on the rotating shaft (3), and install the pin sample (6) on the fixture provided on the loading device (5), so that the pin sample (6) is in contact with the disk sample (2); S2: The pin sample (6) is loaded with a load by the loading device (5) in a fuzzy control manner, and the rotating shaft (3) is driven to rotate around its axis by the driving module (4); S3: The friction sound signal of the friction between the pin sample (6) and the disk sample (2) is obtained through the result module (7), and the time domain feature extraction of the friction sound signal after noise reduction is performed through the wavelet packet analysis method to obtain the wear information of the disk sample (2).

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