Gearbox vibration noise positioning method, device, equipment and readable storage medium

Abstract

A gearbox vibration and noise locating method, device, equipment, and readable storage medium. The gearbox vibration and noise locating method includes: acquiring a vibration signal of the gearbox under test conditions, performing a mixed channel analysis based on the acquired vibration signal to obtain a mixed order spectrum, and performing a synchronous channel analysis based on the input shaft, intermediate shaft, and output shaft as reference axes to obtain the synchronous order spectra of the input shaft, intermediate shaft, and output shaft; determining the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft gear, the axis where the faulty component is located is determined based on the synchronous order spectra of the input shaft, intermediate shaft, and output shaft. When an atypical fault exists, by performing a synchronous channel analysis based on the input shaft, intermediate shaft, and output shaft as reference axes, the vibration signal can be further refined to obtain the synchronous order spectrum of each axis. By comparing the synchronous order spectra of each axis, the axis where the faulty component is located can be accurately determined, thereby achieving precise positioning.

Description

Technical Field

[0001] The present application relates to the field of vibration and noise of mechanical equipment, and in particular to a method, device, equipment and readable storage medium for locating vibration and noise of a gearbox. Background Art

[0002] Gearbox vibration and noise problems are often characterized by order characteristics, because order analysis plays a vital role in the diagnosis of gears and rotating machinery. Order refers to the number of vibration or noise events generated per revolution of a gear or rotating component. Order is related to the number of teeth and speed of the gear and is an important parameter in gear vibration and noise analysis. In a gearbox system, the vibration and noise of each gear have their own specific order characteristics, which are usually expressed in the form of order frequency. Order analysis can more accurately identify the source of gear vibration and noise because the order characteristics are directly related to the physical properties of the gear (such as the number of teeth, speed ratio, etc.). Compared with traditional spectrum analysis, order analysis has more advantages in dealing with gear vibration and noise problems under variable speed conditions because it can eliminate the influence of speed changes on the analysis results.

[0003] Conventional methods typically use a comparison of the problem's characteristic order with a typical shaft gear order table to quickly locate the faulty component. However, this method struggles to accurately locate the faulty component when the characteristic order does not match the typical shaft gear order. Summary of the Invention

[0004] The present application provides a gearbox vibration noise positioning method, device, equipment and readable storage medium, which can solve the technical problem in the related art that traditional methods are difficult to accurately locate faulty parts when the problem order does not fully match the typical order.

[0005] In a first aspect, an embodiment of the present application provides a method for locating vibration noise of a gearbox, the method comprising:

[0006] Acquire the vibration signal of the gearbox under test conditions, perform hybrid channel analysis based on the acquired vibration signal to obtain the hybrid order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft, and output shaft as reference axes to obtain the synchronous order spectra of the input shaft, intermediate shaft, and output shaft;

[0007] The characteristic order of the problem is determined based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft and gear, the shaft where the faulty component is located is determined based on the synchronous order spectrum of the input shaft, intermediate shaft and output shaft.

[0008] In combination with the first aspect, in one embodiment, determining the characteristic order of the problem based on the mixed order spectrum, and if the characteristic order of the problem is inconsistent with the typical order table of shaft gears, determining the shaft where the faulty component is located based on the synchronous order spectra of the input shaft, the intermediate shaft, and the output shaft includes:

[0009] If it is determined that the shaft where the faulty part is located is the intermediate shaft, the measured dimensions of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft are obtained;

[0010] If the absolute value of the difference between the measured size of the driven tooth of the first-stage gear and its own design requirement value is greater than the absolute value of the difference between the measured size of the driving tooth of the second-stage gear and its own design requirement value, it is determined that the tooth where the faulty part is located is the driven tooth of the first-stage gear.

[0011] In conjunction with the first aspect, in one embodiment, after determining the characteristic order of the problem based on the mixed order spectrum, if the characteristic order of the problem is inconsistent with the typical order table of shaft gears, then determining the shaft where the faulty component is located based on the synchronous order spectra of the input shaft, the intermediate shaft, and the output shaft, the method includes:

[0012] If the characteristic order of the problem is consistent with the typical order table of shaft and gear, the corresponding component of the fault is determined based on the typical order table of shaft and gear.

[0013] In combination with the first aspect, in one embodiment, determining the shaft where the faulty component is located based on the typical order table of shaft teeth includes:

[0014] If the faulty component is confirmed to be a primary gear pair based on the typical order table of shaft teeth, then the shafts on which it is located are the input shaft and the intermediate shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the input shaft and the intermediate shaft.

[0015] In combination with the first aspect, in one embodiment, identifying the component corresponding to the fault based on the typical order table of the shaft gear includes:

[0016] If the faulty component is determined to be a secondary gear pair based on the typical order table of shaft teeth, then the shafts on which it is located are the intermediate shaft and the output shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the intermediate shaft and the output shaft.

[0017] In combination with the first aspect, in one embodiment, identifying the component corresponding to the fault based on the typical order table of the shaft gear includes:

[0018] If the fault corresponding component is determined to be the input shaft, intermediate shaft or output shaft based on the typical order table of shaft teeth, then the fault corresponding component is determined to be the corresponding input shaft, intermediate shaft or output shaft.

[0019] In combination with the first aspect, in one embodiment, obtaining a vibration signal of the gearbox under a test condition, performing hybrid channel analysis based on the acquired vibration signal to obtain a hybrid order spectrum, and performing synchronous channel analysis based on the input shaft, the intermediate shaft, and the output shaft as reference axes to obtain synchronous order spectra of the input shaft, the intermediate shaft, and the output shaft, includes:

[0020] Acquire the vibration signal of the gearbox under test conditions, perform equal-angle resampling based on the acquired vibration signal, and obtain the mixed order spectrum through variable discrete Fourier transform;

[0021] The collected vibration signals are resampled at equal angles based on the input shaft, intermediate shaft and output shaft as reference axes respectively. The resampled signals are averaged according to the set number of blocks, and the synchronous order spectra of the input shaft, intermediate shaft and output shaft are obtained through variable discrete Fourier transform.

[0022] In a second aspect, an embodiment of the present application provides a gearbox vibration noise locating device, the gearbox vibration noise locating device comprising:

[0023] An order spectrum acquisition module is used to acquire the vibration signal of the gearbox under test conditions, perform hybrid channel analysis based on the acquired vibration signal to obtain a hybrid order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft, and output shaft as reference axes to obtain the synchronous order spectra of the input shaft, intermediate shaft, and output shaft;

[0024] The judgment module is used to determine the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft and gear, the shaft where the faulty component is located is determined based on the synchronous order spectrum of the input shaft, intermediate shaft and output shaft.

[0025] In a third aspect, an embodiment of the present application provides a gearbox vibration noise locating device, which includes a processor, a memory, and a gearbox vibration noise locating program stored on the memory and executable by the processor, wherein when the gearbox vibration noise locating program is executed by the processor, the steps of the gearbox vibration noise locating method described in some of the above embodiments are implemented.

[0026] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a gearbox vibration noise locating program is stored. When the gearbox vibration noise locating program is executed by a processor, the steps of the gearbox vibration noise locating method described in some of the above embodiments are implemented.

[0027] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0028] The hybrid order spectrum obtained through hybrid channel analysis comprehensively reflects the vibration characteristics of the gearbox under test conditions, helping to identify abnormal vibration modes and subsequently determine the characteristic order of the problem. If the characteristic order of the problem does not match the typical order table for shaft gears, this indicates an atypical fault. In this case, performing synchronous channel analysis based on the input, intermediate, and output shafts as reference axes further refines the vibration signal and generates synchronized order spectra for each axis. Comparing the synchronized order spectra of each axis accurately identifies the axis where the faulty component is located, enabling precise location. Combining hybrid and synchronous channel analysis provides a more comprehensive and accurate diagnostic basis, significantly improving diagnostic efficiency and reducing the possibility of human error. Promptly identifying early signs of gearbox faults facilitates preventive measures to prevent further development and more severe damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of an embodiment of a method for locating vibration noise of a gearbox according to an embodiment of the present application;

[0030] Figure 2 This is a structural diagram of an embodiment of a gearbox in the embodiment of the present application;

[0031] Figure 3 The mixed order spectrum of the input axis obtained by the mixed channel analysis of the embodiment of the present application;

[0032] Figure 4 The synchronous order spectrum of the input axis obtained by the synchronous channel analysis of the embodiment of the present application;

[0033] Figure 5 The synchronous order spectrum of the intermediate axis obtained by analyzing the synchronous channel according to the embodiment of the present application;

[0034] Figure 6 The synchronous order spectrum of the output shaft obtained by the synchronous channel analysis of the embodiment of the present application;

[0035] Figure 7 This is a schematic diagram of the hardware structure of the gearbox vibration noise locating device involved in the embodiment of the present application.

[0036] In the figure: 1. Input shaft; 2. Intermediate shaft; 3. Output shaft; 4. Primary gear driving teeth; 5. Primary gear driven teeth; 6. Secondary gear driving teeth; 7. Secondary gear driven teeth. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0039] In a first aspect, an embodiment of the present application provides a method for locating vibration noise of a gearbox.

[0040] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the gearbox vibration noise positioning method of this application. Figure 1 As shown in the figure, the gearbox vibration noise positioning method includes:

[0041] S100: Acquire a vibration signal of the gearbox under a test condition, perform a hybrid channel analysis based on the acquired vibration signal to obtain a hybrid order spectrum, and perform a synchronous channel analysis based on the input shaft, the intermediate shaft, and the output shaft as reference axes to obtain synchronous order spectra of the input shaft, the intermediate shaft, and the output shaft;

[0042] S200: Determine the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft gear, determine the shaft where the faulty component is located based on the synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft.

[0043] In this embodiment, while the gearbox is under test conditions, a vibration sensor is used to collect its vibration signals. These signals contain various dynamic information about the gearbox during operation. Hybrid channel analysis is performed on the collected vibration signals. Through hybrid channel analysis, a hybrid order spectrum is obtained. This spectrum shows the components and amplitudes of different orders (i.e., the ratio of vibration frequency to rotational speed) in the vibration signal. Synchronous channel analysis is performed using the input shaft, intermediate shaft, and output shaft as reference shafts. This analysis method can more accurately reflect the vibration conditions of each shaft and its associated gears. Synchronous channel analysis can obtain synchronized order spectra for the input shaft, intermediate shaft, and output shaft. These spectra respectively show the vibration conditions of each shaft at different orders. Based on the hybrid order spectrum, characteristic orders of the problem are identified. These orders are typically associated with abnormal vibration or faults in the gearbox. The characteristic orders of the problem are compared with a table of typical shaft and tooth orders. If the characteristic orders of the problem are consistent with the typical orders, the fault type can be directly determined; if not, further analysis is required. When the characteristic order of the problem differs from the typical order, the synchronous order spectra of the input, intermediate, and output shafts are used to locate the fault. By comparing the synchronous order spectra of each shaft, the axis on which the faulty component is located can be determined. The combined use of hybrid channel analysis and synchronous channel analysis enables more accurate identification of gearbox fault characteristics and improves the accuracy of fault diagnosis. By comparing the synchronous order spectra of each shaft, the shaft on which the faulty component is located can be precisely located, providing strong support for subsequent repair and replacement. Based on accurate fault diagnosis and location, more reasonable maintenance plans can be formulated, reducing unnecessary disassembly and inspection, and improving maintenance efficiency. Fault diagnosis and analysis can identify deficiencies in gearbox design and manufacturing, providing important evidence for subsequent improvement and optimization. In summary, the S100 and S200 steps together constitute a complete gearbox fault diagnosis process that effectively identifies fault characteristics, locates the faulty component, and provides strong support for subsequent repair and improvement.

[0044] Furthermore, in one embodiment, in S200, the following steps are included:

[0045] S200-1: If it is determined that the shaft where the faulty component is located is the intermediate shaft, obtain the measured dimensions of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft;

[0046] S200-2: If the absolute value of the difference between the measured size of the driven tooth of the first-stage gear and its own design requirement value is greater than the absolute value of the difference between the measured size of the driving tooth of the second-stage gear and its own design requirement value, it is determined that the tooth where the faulty part is located is the driven tooth of the first-stage gear.

[0047] In this embodiment, in a further refinement, in the case where the shaft on which the faulty component is located is determined to be the intermediate shaft in step S200, the analysis in step S200 has already determined that the shaft on which the faulty component is located is the intermediate shaft. Precision measuring instruments (such as Wenzel, Klingelnberg, etc.) can be used to measure the actual dimensions of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft. Accurate gear dimension data is obtained for comparison with the design requirements. The absolute value of the difference between the measured dimension of the primary gear driven teeth and their design requirements is calculated. The absolute value of the difference between the measured dimension of the secondary gear driving teeth and their design requirements is calculated. These two absolute values ​​of difference are compared. If the absolute value of the difference between the measured dimension of the primary gear driven teeth and their design requirements is greater than that of the secondary gear driving teeth, it can be inferred that the primary gear driven teeth may have a greater manufacturing error or wear, and are therefore more likely to be the source of the fault. Based on the comparison results, if the absolute value of the difference between the measured dimension of the primary gear driven teeth and their design requirements is greater, the tooth on which the faulty component is located is determined to be the primary gear driven tooth. By comparing the measured dimensions with the design requirements, the gear where the faulty part is located can be identified more accurately, avoiding misjudgments and missed judgments. After clarifying the gear where the faulty part is located, maintenance personnel can directly replace or repair the gear, improving the targetedness and efficiency of maintenance. For gears with large manufacturing errors, information can be fed back to the design and manufacturing departments so that they can improve the production process and quality control process to reduce the occurrence of similar failures. This embodiment further improves the accuracy of gearbox fault diagnosis and maintenance efficiency by adding a specific step to identify the gear where the faulty part is located, and also provides useful feedback for the design and manufacture of gearboxes.

[0048] Furthermore, in one embodiment, after S200, the following steps are included:

[0049] S300: If the characteristic order of the problem is consistent with the shaft gear typical order table, then determine the component corresponding to the fault based on the shaft gear typical order table.

[0050] In this embodiment, in step S200, the characteristic order of the problem has been determined through the mixed order spectrum. If this characteristic order of the problem is consistent with an order in the typical shaft and gear order table, the typical shaft and gear order table is consulted to find the order that matches the characteristic order of the problem. Based on the information in the typical shaft and gear order table, the shaft or gear pair corresponding to this order is determined (input shaft, intermediate shaft or output shaft, primary gear pair or secondary gear pair). If the characteristic order of the problem is clear and consistent with the typical order, the corresponding component of the fault can be quickly and accurately determined.

[0051] Furthermore, in one embodiment, in S300, the following steps are included:

[0052] S300-1: If the faulty component is confirmed to be a primary gear pair based on the typical order table of shaft teeth, the shafts on which it is located are the input shaft and the intermediate shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the input shaft and the intermediate shaft.

[0053] In this embodiment, in step S300, it has been determined that the faulty part is a primary gear pair through the typical order table of the shaft teeth. Since the primary gear pair's main and driven gears are on the input shaft and the intermediate shaft respectively, it can be determined that the shafts where the faulty part is located are the input shaft and the intermediate shaft. Review the synchronous order spectrum of the input shaft and the intermediate shaft obtained in step S100. Compare the problem characteristic order with the order in the synchronous order spectrum of the input shaft and the intermediate shaft, find the order that matches the problem characteristic order in the synchronous order spectrum of the input shaft and the intermediate shaft, and determine the amplitude corresponding to the order. If the amplitude corresponding to the order of the input shaft is greater than the amplitude corresponding to the order of the intermediate shaft, then it is determined that the primary gear driving tooth on the input shaft is the tooth where the faulty part is located. If the amplitude corresponding to the order of the input shaft is less than the amplitude corresponding to the order of the intermediate shaft, then it is determined that the primary gear driven tooth on the intermediate shaft is the tooth where the faulty part is located.

[0054] Furthermore, in one embodiment, in S300, the following steps are included:

[0055] S300-1: If the faulty component is determined to be a secondary gear pair based on the typical order table of shaft teeth, the shafts on which it is located are the intermediate shaft and the output shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the intermediate shaft and the output shaft.

[0056] In this embodiment, in step S300, it has been determined that the faulty part is a secondary gear pair through the typical order table of shaft teeth, and the shafts where it is located are the intermediate shaft and the output shaft. Review the synchronous order spectrum of the intermediate shaft and the output shaft obtained in step S100. Compare the problem characteristic order with the order in the synchronous order spectrum of the intermediate shaft and the output shaft, find the order that matches the problem characteristic order in the synchronous order spectrum of the input shaft and the intermediate shaft, and determine the amplitude corresponding to the order. If the amplitude corresponding to the order of the intermediate shaft is greater than the amplitude corresponding to the order of the output shaft, then the secondary gear driving tooth on the intermediate shaft is determined to be the tooth where the faulty part is located. If the amplitude corresponding to the order of the intermediate shaft is less than the amplitude corresponding to the order of the output shaft, then the secondary gear driven tooth on the output shaft is determined to be the tooth where the faulty part is located.

[0057] Furthermore, in one embodiment, in S300, the following steps are included:

[0058] S300-1: If it is determined based on the typical order table of shaft teeth that the corresponding component of the fault is solely the input shaft, the intermediate shaft or the output shaft, then the corresponding component of the fault is determined to be the corresponding input shaft, the intermediate shaft or the output shaft.

[0059] In this embodiment, in step S300, the problem characteristic order is analyzed using the shaft gear typical order table. Based on the problem characteristic order, a matching order is searched in the shaft gear typical order table. If the problem characteristic order alone matches the typical order of the input shaft, the shaft where the faulty component is located is determined to be the input shaft. If the problem characteristic order alone matches the typical order of the intermediate shaft, the shaft where the faulty component is located is determined to be the intermediate shaft. If the problem characteristic order alone matches the typical order of the output shaft, the shaft where the faulty component is located is determined to be the output shaft.

[0060] Furthermore, in one embodiment, in S100, the following steps are included:

[0061] S100-1: Acquire the vibration signal of the gearbox under test conditions, perform equal-angle resampling based on the acquired vibration signal, and obtain the mixed order spectrum through variable discrete Fourier transform;

[0062] S100-2: Based on the input shaft, intermediate shaft, and output shaft as reference axes, the collected vibration signals are resampled at equal angles. The resampled signals are averaged according to the set number of blocks, and the synchronous order spectra of the input shaft, intermediate shaft, and output shaft are obtained through variable discrete Fourier transform.

[0063] In this embodiment, under test conditions, a sensor collects vibration signals from the gearbox. The collected vibration signals are uniformly resampled to eliminate frequency ambiguity caused by varying gear speeds. A variable discrete Fourier transform (VDFT) is performed on the uniformly resampled signals to obtain a mixed order spectrum containing various order components. This mixed order spectrum displays the frequency components and amplitudes of different orders in the vibration signal. The input shaft, intermediate shaft, and output shaft are selected as reference axes. Based on the speed information of each reference axis, the collected vibration signals are uniformly resampled. This ensures that each sampling point corresponds to a fixed angle of rotation of the reference axis. The uniformly resampled signals are averaged over a set number of blocks. This helps reduce the impact of noise and random errors and improves signal quality. A variable discrete Fourier transform (VDFT) is performed on the averaged signals to obtain synchronized order spectra for the input shaft, intermediate shaft, and output shaft. Synchronized order spectra for the input shaft, intermediate shaft, and output shaft are then output, each displaying the frequency components and amplitudes of different orders in the vibration signal with each shaft as the reference.

[0064] The collected vibration signal undergoes uniform angle resampling. This is a signal processing technique that converts time-domain signals into signals related to the gear rotation angle, eliminating frequency ambiguity caused by varying gear speeds. This ensures that each sampling point corresponds to a fixed gear rotation angle, more accurately reflecting the gear's vibration characteristics. The uniform angle resampled signal is then subjected to a variable discrete Fourier transform (VDFT). The VDFT is a Fourier transform method that can handle non-uniformly sampled data and is suitable for uniform angle resampled signals. The VDFT converts the time-domain signal into the frequency domain, generating a mixed order spectrum containing various order components. This mixed order spectrum displays the frequency components and amplitudes of different orders in the vibration signal and is an important basis for subsequent fault diagnosis. The mixed order spectrum contains the frequency components and amplitudes of each order in the vibration signal. The combination of uniform angle resampling and VDFT processing yields a more accurate mixed order spectrum, enabling more precise identification of fault characteristic orders and improving the accuracy of fault diagnosis. Equal-angle resampling eliminates frequency ambiguity caused by varying gear speeds, making fault diagnosis more reliable. This technique is particularly useful for diagnosing gearbox faults with varying speeds. VDFT can process non-uniformly sampled data, improving spectral resolution and making the frequency components in the mixed-order spectrum more clearly discernible.

[0065] In summary, the embodiment of the present application provides the following complete description of the gearbox vibration noise location method:

[0066] Step 1: Determine the gearbox shaft tooth number information, input shaft 1, intermediate shaft 2 and output shaft 3; first gear pair: the number of teeth of the first gear driving tooth 4 is 22, the number of teeth of the first gear driven tooth 5 is 75; second gear pair: the number of teeth of the second gear driving tooth 6 is 21, the number of teeth of the second gear driven tooth 7 is 65; its layout is as follows Figure 2 As shown;

[0067] Step 2: Based on the gearbox shaft tooth number information, the typical gearbox shaft tooth order table (with the input shaft as the reference axis) is shown in Table 1 below;

[0068] Table 1

[0069]

[0070] Step 3: Test the gearbox according to the working conditions in Table 2 below;

[0071] Table 2

[0072] Working conditions Speed Torque rate Low speed high torque drive 100-5000rpm 80Nm 200rpm / s

[0073] Step 4: Determine the block length and number of equal-angle sampling. The block length and number of blocks are shown in Table 3.

[0074] Table 3

[0075] shafting analyze Block length Number of blocks input shaft Mixing Channel 2048Hz 4 input shaft Synchronous Channel 2048Hz 4 intermediate shaft Synchronous Channel 4096Hz 2 output shaft Synchronous Channel 16384Hz 2

[0076] Step 5: Perform mixed and synchronous channel analysis on the collected vibration signals. When performing mixed channel analysis, the input axis 1 can be used as the reference axis to capture the vibration signal, set a suitable sampling rate, perform equal angle resampling on the collected vibration signal, and obtain the mixed order spectrum through variable discrete Fourier transform (see Figure 3 ), used to preliminarily identify the characteristic order of the problem; based on the input shaft 1, intermediate shaft 2 and output shaft 3 as the reference axes, the rotation angles of the collected vibration signals are resampled at equal angles, and the resampled signals are averaged according to the set number of blocks (as shown in Table 3) to reduce the interference of non-related signals. Because the values ​​of non-reference axis related signals (for example, the reference axis is the intermediate shaft 2, and the signal caused by the input shaft 1) at different rotation angles of the reference axis are random, they will be averaged and no longer stand out in the multi-cycle averaging process; while the values ​​of the reference axis related signals at different rotation angles of the reference axis are consistent, they will be retained and highlighted in the multi-cycle averaging process, and then the variable discrete Fourier transform is applied to obtain the synchronized order spectra of the three axes (see Figure 4 、 Figure 5 and Figure 6 );

[0077] Step 6: Based on Figure 3 The mixed order spectrum is determined to have a maximum value of 67.5dB at the 15th order on the horizontal axis, which means that the characteristic order of the problem has a complaint at the 15th order. According to the above table 1 of typical orders of shaft gears, it is confirmed that the 15th order is not a typical order of shaft gears.

[0078] Step 7: Based on Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The synchronous order spectrum of the input axis 1, intermediate axis 2 and output axis 3 is statistically analyzed, and the amplitude statistics of the mixed and synchronous channels at the 15th order are shown in Table 4 below;

[0079] Table 4

[0080] Reference axis analyze Calculation formula Order Amplitude (dB) input shaft Mixing Channel 1*15 15 66 input shaft Synchronous Channel 1*15 15 62 intermediate shaft Synchronous Channel 75 / 22*15 51 67 output shaft Synchronous Channel 75 / 22*65 / 21*15 158 50

[0081] Step 8: Based on Table 4 above, when there is a complaint at the 15th order of the problem feature, the order corresponding to intermediate shaft 2 is 51st order with an amplitude of 67dB, and the order of output shaft 3 is 158th order with an amplitude of 50dB. 67dB is greater than 50dB, so intermediate shaft 2 is the shaft where the faulty component is located. The faulty component is narrowed down to the two gears on intermediate shaft 2, the primary gear driven tooth 5 and the secondary gear driving tooth 6. Through further dimensional testing, if the absolute value of the difference between the measured size of the primary gear driven tooth 5 and its own design requirement value is greater than the absolute value of the difference between the measured size of the secondary gear driving tooth 6 and its own design requirement value, then the faulty tooth is determined to be the primary gear driven tooth 5;

[0082] Step 9: If based on Figure 3 The mixed order spectrum of the problem is determined to be 1 order, which is the typical order of the shaft gear. Based on Table 1, the input shaft 1 is determined to be the shaft where the fault part is located; if based on Figure 3 The mixed order spectrum of the problem is determined to be 22 orders, which is the typical order of the shaft gear. Based on Table 1, the input shaft 1 and the intermediate shaft 2 are determined to be the shafts where the fault parts are located. Then, based on Figure 4 and Figure 5 Compare the amplitudes of input shaft 1 and intermediate shaft 2 at 22nd order. If the amplitude of input shaft 1 at 22nd order is greater than that of intermediate shaft 2 at 22nd order, the primary gear driving tooth 4 is the tooth where the fault is located. If the amplitude of input shaft 1 at 22nd order is less than that of intermediate shaft 2 at 22nd order, the primary gear driven tooth 5 is the tooth where the fault is located. Similarly, if based on Figure 3 The mixed order spectrum of the problem is determined to be 6.16, which is the typical order of the shaft gear. Based on Table 1, the intermediate shaft 2 and the output shaft 3 are determined to be the shafts where the fault parts are located. Then based on Figure 4 and Figure 5 Compare the amplitudes of the intermediate shaft 2 and the output shaft 3 at the 6.16th order. If the amplitude of the intermediate shaft 2 at the 6.16th order is greater than the amplitude of the output shaft 3 at the 22nd order, the driving tooth 6 of the secondary gear is the tooth where the fault is located. If the amplitude of the intermediate shaft 2 at the 6.16th order is less than the amplitude of the output shaft 3 at the 6.16th order, the driven tooth 7 of the secondary gear is the tooth where the fault is located.

[0083] In the second aspect, an embodiment of the present application also provides a gearbox vibration noise locating device, which includes: an order spectrum acquisition module, which is used to acquire the vibration signal of the gearbox under the test condition, perform mixed channel analysis based on the collected vibration signal to obtain a mixed order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft and output shaft as reference axes to obtain the synchronous order spectra of the input shaft, intermediate shaft and output shaft; a judgment module, which is used to determine the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft teeth, the shaft where the faulty part is located is determined based on the synchronous order spectra of the input shaft, intermediate shaft and output shaft.

[0084] Among them, the functional implementation of each module in the above-mentioned gearbox vibration noise locating device corresponds to the various steps in the above-mentioned gearbox vibration noise locating method embodiment, and their functions and implementation processes are no longer repeated here.

[0085] In a third aspect, an embodiment of the present application provides a gearbox vibration noise locating device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0086] Reference Figure 7 , Figure 7 Schematic diagram of the hardware structure of the gearbox vibration noise locating device involved in the embodiment of the present application. In the embodiment of the present application, the gearbox vibration noise locating device may include a processor, a memory, a communication interface and a communication bus.

[0087] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0088] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the gearbox vibration and noise locating device, as well as interfaces that connect the device to other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber, or ATM interfaces; user devices can include displays and keyboards.

[0089] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0090] The processor may be a general-purpose processor that can call a gearbox vibration noise locating program stored in a memory and execute the gearbox vibration noise locating method provided in an embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the gearbox vibration noise locating program is called can refer to the various embodiments of the gearbox vibration noise locating method of the present application and will not be repeated here.

[0091] Those skilled in the art will understand that Figure 7 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0092] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0093] The readable storage medium of the present application stores a gearbox vibration noise locating program, wherein when the gearbox vibration noise locating program is executed by a processor, the steps of the gearbox vibration noise locating method as described above are implemented.

[0094] Among them, the method implemented when the gearbox vibration noise locating program is executed can refer to the various embodiments of the gearbox vibration noise locating method of the present application, and will not be repeated here.

[0095] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0096] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0097] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0098] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0099] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0100] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0101] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for locating gearbox vibration noise, characterized in that: The gearbox vibration noise positioning method includes: Acquire the vibration signal of the gearbox under test conditions, perform hybrid channel analysis based on the acquired vibration signal to obtain the hybrid order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft, and output shaft as reference axes to obtain the synchronous order spectra of the input shaft, intermediate shaft, and output shaft; Determine the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft and gear, determine the shaft where the faulty component is located based on the synchronous order spectrum of the input shaft, intermediate shaft and output shaft; The method of determining the characteristic order of the problem based on the mixed order spectrum, and if the characteristic order of the problem is inconsistent with the typical order table of the shaft gear, then determining the shaft where the faulty component is located based on the synchronous order spectrum of the input shaft, the intermediate shaft, and the output shaft, includes: If it is determined that the shaft where the faulty part is located is the intermediate shaft, the measured dimensions of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft are obtained; If the absolute value of the difference between the measured size of the driven tooth of the first gear and its own design requirement value is greater than the absolute value of the difference between the measured size of the driving tooth of the second gear and its own design requirement value, then it is determined that the tooth where the faulty part is located is the driven tooth of the first gear; The method includes obtaining a vibration signal of the gearbox under a test condition, performing a hybrid channel analysis based on the acquired vibration signal to obtain a hybrid order spectrum, and performing a synchronous channel analysis based on the input shaft, the intermediate shaft, and the output shaft as reference shafts to obtain synchronous order spectra of the input shaft, the intermediate shaft, and the output shaft, including: Acquire the vibration signal of the gearbox under test conditions, perform equal-angle resampling based on the acquired vibration signal, and obtain the mixed order spectrum through variable discrete Fourier transform; The collected vibration signals are resampled at equal angles based on the input shaft, intermediate shaft and output shaft as reference axes respectively. The resampled signals are averaged according to the set number of blocks, and the synchronous order spectra of the input shaft, intermediate shaft and output shaft are obtained through variable discrete Fourier transform.

2. The gearbox vibration noise positioning method according to claim 1, characterized in that: After determining the characteristic order of the problem based on the mixed order spectrum, if the characteristic order of the problem is inconsistent with the typical order table of the shaft and gear, the shaft where the faulty component is located is determined based on the synchronous order spectrum of the input shaft, the intermediate shaft, and the output shaft, including: If the characteristic order of the problem is consistent with the typical order table of shaft and gear, the corresponding component of the fault is determined based on the typical order table of shaft and gear.

3. The gearbox vibration noise positioning method according to claim 2, characterized in that: The identification of the corresponding component of the fault based on the typical order table of the shaft gear includes: If the faulty component is confirmed to be a primary gear pair based on the typical order table of shaft teeth, then the shafts on which it is located are the input shaft and the intermediate shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the input shaft and the intermediate shaft.

4. The gearbox vibration noise positioning method according to claim 2, characterized in that: The identification of the corresponding component of the fault based on the typical order table of the shaft gear includes: If the faulty component is determined to be a secondary gear pair based on the typical order table of shaft teeth, then the shafts on which it is located are the intermediate shaft and the output shaft, and the tooth where the faulty component is located is determined based on the characteristic order of the problem and the synchronous order spectrum of the intermediate shaft and the output shaft.

5. The gearbox vibration noise positioning method according to claim 2, characterized in that: The identification of the corresponding component of the fault based on the typical order table of the shaft gear includes: If the fault corresponding component is determined to be the input shaft, intermediate shaft or output shaft based on the typical order table of shaft teeth, then the fault corresponding component is determined to be the corresponding input shaft, intermediate shaft or output shaft.

6. A gearbox vibration noise positioning device, characterized in that: The gearbox vibration noise positioning device comprises: An order spectrum acquisition module is used to acquire the vibration signal of the gearbox under test conditions, perform mixed channel analysis based on the collected vibration signal to obtain a mixed order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft and output shaft as reference axes to obtain synchronous order spectra of the input shaft, intermediate shaft and output shaft; it is also used to acquire the vibration signal of the gearbox under test conditions, perform equal-angle resampling based on the collected vibration signal, and obtain a mixed order spectrum through a variable discrete Fourier transform; it performs equal-angle resampling on the collected vibration signal based on the input shaft, intermediate shaft and output shaft as reference axes, averages the equal-angle resampled signal according to a set number of blocks, and obtains the synchronous order spectrum of the input shaft, intermediate shaft and output shaft through a variable discrete Fourier transform; A judgment module is used to determine the characteristic order of the problem based on the mixed order spectrum. If the characteristic order of the problem is inconsistent with the typical order table of the shaft teeth, the shaft where the faulty part is located is determined based on the synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft; it is also used to obtain the measured dimensions of the primary gear driven tooth and the secondary gear driving tooth on the intermediate shaft if it is determined that the shaft where the faulty part is located is the intermediate shaft; if the absolute value of the difference between the measured dimension of the primary gear driven tooth and its own design requirement value is greater than the absolute value of the difference between the measured dimension of the secondary gear driving tooth and its own design requirement value, it is determined that the tooth where the faulty part is located is the primary gear driven tooth.

7. A gearbox vibration noise positioning device, characterized in that: The gearbox vibration and noise locating device includes a processor, a memory, and a gearbox vibration and noise locating program stored in the memory and executable by the processor, wherein when the gearbox vibration and noise locating program is executed by the processor, the steps of the gearbox vibration and noise locating method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a gearbox vibration and noise locating program, wherein when the gearbox vibration and noise locating program is executed by a processor, the steps of the gearbox vibration and noise locating method according to any one of claims 1 to 5 are implemented.

Images