Gear box vibration noise positioning method, device and equipment and readable storage medium

Abstract

The invention discloses a gear box vibration noise positioning method, device and equipment and a readable storage medium, and the gear box vibration noise positioning method comprises the steps: obtaining a vibration signal of a gear box under a test condition, carrying out the mixed channel analysis based on the collected vibration signal, obtaining a mixed order spectrum, and obtaining the mixed order spectrum; performing synchronous channel analysis based on the input shaft, the intermediate shaft and the output shaft as reference shafts to obtain synchronous order spectrums of the input shaft, the intermediate shaft and the output shaft; and a problem feature order is determined based on the mixed order spectrum, and if the problem feature order is not consistent with the shaft tooth typical order table, the shaft where the fault part is located is determined based on the synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft. When an atypical fault exists, synchronous channel analysis is carried out based on the input shaft, the intermediate shaft and the output shaft as reference shafts, vibration signals can be further refined, the synchronous order spectrum of each shaft is obtained, the synchronous order spectrum of each shaft is compared, the shaft where the fault part is located can be accurately judged, and therefore accurate positioning combination is achieved.

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 gear box. 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 part. 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 has its 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] In the related art, the traditional method is to quickly locate the faulty component by comparing the fault characteristic order with the typical order table of the shaft gear. However, this method is difficult to accurately locate the faulty component when the fault characteristic order does not match the typical order of the shaft gear. 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 that traditional methods in the related art are difficult to accurately locate faulty parts when the problem order does not completely match the typical order.

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

[0006] Acquire the vibration signal of the gearbox under the test condition, perform mixed channel analysis based on the acquired vibration signal to obtain the mixed order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft and output shaft as reference shafts to obtain the synchronous order spectrum 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 shaft gears, 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 implementation, 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, 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:

[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 primary gear driven tooth 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 and its own design requirement value, it is determined that the tooth where the faulty part is located is the primary gear driven tooth.

[0011] In combination with the first aspect, in one implementation, after determining the problem characteristic order based on the mixed order spectrum, if the problem characteristic order is inconsistent with the shaft gear typical order table, 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, the method includes:

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

[0013] In combination with the first aspect, in one implementation, determining the shaft where the faulty component is located based on a 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 implementation, the step of confirming 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 implementation, the step of confirming the component corresponding to the fault based on the typical order table of the shaft gear includes:

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

[0019] In combination with the first aspect, in one implementation, the obtaining of the vibration signal of the gearbox under the test condition, 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, the intermediate shaft and the output shaft as reference shafts to obtain the synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft, includes:

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

[0021] The input shaft, intermediate shaft and output shaft are used as reference axes to perform equal-angle resample on the collected vibration signals. The signals after equal-angle resample 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 by 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 the test condition, perform mixed channel analysis based on the acquired vibration signal to obtain a mixed order spectrum, and perform 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;

[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 gear, 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.

[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 in 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 brought by the technical solution provided in the embodiments of the present application include:

[0028] The hybrid order spectrum obtained by hybrid channel analysis can fully reflect the vibration characteristics of the gearbox under the test conditions, which helps to identify abnormal vibration modes and then determine the characteristic order of the problem. If the characteristic order of the problem is inconsistent with the typical order table of the shaft gear, it means that there is an atypical fault. At this time, by performing synchronous channel analysis based on the input shaft, intermediate shaft and output shaft as reference shafts, the vibration signal can be further refined to obtain the synchronous order spectrum of each shaft. By comparing the synchronous order spectra of each shaft, the shaft where the faulty part is located can be accurately determined, thereby achieving precise positioning. Combining hybrid channel analysis and synchronous channel analysis provides a more comprehensive and accurate diagnosis basis. It can greatly improve the diagnostic efficiency and reduce the possibility of human misjudgment. Timely discovery of early fault characteristics of the gearbox helps to take preventive measures to avoid further development of the fault and cause more serious damage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 2 This is a schematic structural diagram of an embodiment of a gearbox in an 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 the synchronous channel analysis of 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 solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, 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 the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with 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 the present application. Figure 1 As shown, the gearbox vibration noise positioning method includes:

[0041] S100: Acquire a vibration signal of the gearbox under a test condition, perform a mixed channel analysis based on the acquired vibration signal to obtain a mixed order spectrum, and perform 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;

[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, when the gearbox is in a test condition, a vibration sensor is used to collect its vibration signal. These signals contain various dynamic information when the gearbox is running. The collected vibration signal is subjected to mixed channel analysis. Through mixed channel analysis, a mixed order spectrum can be obtained. This spectrum shows the components and amplitudes of different orders (i.e., the ratio of vibration frequency to rotation speed) in the vibration signal. Synchronous channel analysis is performed using the input shaft, intermediate shaft and output shaft as reference shafts respectively. This analysis method can more accurately reflect the vibration conditions of each shaft and its related gears. Through synchronous channel analysis, the synchronous order spectra of the input shaft, intermediate shaft and output shaft can be obtained. These spectra respectively show the vibration conditions of each shaft at different orders. Based on the mixed order spectrum, the problem characteristic order is identified. These orders are usually related to abnormal vibration or fault of the gearbox. Compare the problem characteristic order with the typical order table of shaft teeth. If the problem characteristic order is consistent with the typical order, the fault type can be directly determined; if not, further analysis is required. When the characteristic order of the problem is inconsistent with the typical order, the synchronous order spectrum of the input shaft, intermediate shaft and output shaft is used to locate the fault. By comparing the synchronous order spectrum of each shaft, the shaft where the faulty part is located can be determined. By using hybrid channel analysis and synchronous channel analysis in combination, the fault characteristics of the gearbox can be more accurately identified and the accuracy of fault diagnosis can be improved. By comparing the synchronous order spectrum of each shaft, the shaft where the faulty part is located can be accurately located, providing strong support for subsequent maintenance and replacement. Based on accurate fault diagnosis and location, a more reasonable maintenance plan can be formulated, unnecessary disassembly and inspection can be reduced, and maintenance efficiency can be improved. Through fault diagnosis and analysis, deficiencies in gearbox design and manufacturing can be discovered, providing an important basis for subsequent improvement and optimization. In summary, the two steps of S100 and S200 together constitute a complete gearbox fault diagnosis process, which can effectively identify fault characteristics, locate faulty parts, and provide strong support for subsequent maintenance 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, then the measured dimensions of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft are obtained;

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

[0047] In this embodiment, in a further refined embodiment, for the case where the shaft where the faulty part is located is determined to be the intermediate shaft in step S200, the shaft where the faulty part is located has been determined to be the intermediate shaft through the analysis in step S200. Precision measuring instruments (such as Wenze, Klingberg, etc.) can be used to measure the actual size of the primary gear driven teeth and the secondary gear driving teeth on the intermediate shaft. Obtain accurate gear size data for comparison with the design requirement value. Calculate the absolute value of the difference between the measured size of the primary gear driven teeth and its design requirement value. Calculate the absolute value of the difference between the measured size of the secondary gear driving teeth and its design requirement value. Compare these two absolute values ​​of difference. If the absolute value of the difference between the measured size of the primary gear driven teeth and the design requirement value is greater than that of the secondary gear driving teeth, it can be inferred that the primary gear driven teeth may have a larger manufacturing error or wear, and therefore are more likely to be the source of the fault. Based on the above comparison results, if the absolute value of the difference between the measured size of the primary gear driven teeth and the design requirement value is greater, it is determined that the tooth where the faulty part is located is the primary gear driven teeth. By comparing the measured dimensions with the design requirement values, the gear where the faulty part is located can be identified more accurately to avoid misjudgment and missed judgment. After clarifying the gear where the faulty part is located, maintenance personnel can directly replace or repair the gear, which improves the pertinence 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 and 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] Further, in one embodiment, after S200, the following steps are included:

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

[0050] In this embodiment, in step S200, the problem characteristic order has been determined by the mixed order spectrum. If the problem characteristic order is consistent with an order in the shaft gear typical order table. Consult the shaft gear typical order table to find the order that matches the problem characteristic order. According to the information in the shaft gear typical order table, determine which shaft or gear pair corresponds to this order (input shaft, intermediate shaft or output shaft, primary gear pair or secondary gear pair). When the problem characteristic order is clear and consistent with the typical order, the corresponding component of the fault is determined quickly and accurately.

[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 on which 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 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, 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, it is determined that the primary gear driven tooth of 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, then the shafts on which it is located are the intermediate shaft and the output shaft, and the tooth on which 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, it is determined that the secondary gear driving tooth on the intermediate shaft is 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, it is determined that the secondary gear driven tooth of the output shaft is 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 the input shaft, the intermediate shaft or the output shaft alone, 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 has been analyzed through the shaft gear typical order table. According to the problem characteristic order, the matching order is searched in the shaft gear typical order table. If the problem characteristic order matches the typical order of the input shaft alone, it is determined that the shaft where the faulty part is located is the input shaft. If the problem characteristic order matches the typical order of the intermediate shaft alone, it is determined that the shaft where the faulty part is located is the intermediate shaft. If the problem characteristic order matches the typical order of the output shaft alone, it is determined that the shaft where the faulty part is located is the output shaft.

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

[0061] S100-1: Obtain the vibration signal of the gearbox under the test condition, 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 signals after equal angle resampled 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 the test condition, the vibration signal of the gearbox is collected by the sensor. The collected vibration signal is resampled at equal angles to eliminate the frequency ambiguity caused by the change in gear speed. The signal after equal angle resampling is subjected to variable discrete Fourier transform (VDFT) to obtain a mixed order spectrum containing various order components. The mixed order spectrum shows the frequency components and amplitudes of different orders in the vibration signal. The input shaft, the intermediate shaft and the output shaft are selected as reference shafts respectively. Based on the speed information of each reference shaft, the collected vibration signal is resampled at equal angles. In this way, each sampling point will correspond to a fixed angle of rotation of the reference shaft. The signal after equal angle resampling is averaged according to the set number of blocks. This helps to reduce the influence of noise and random errors and improve the quality of the signal. The signal after average processing is subjected to variable discrete Fourier transform (VDFT) to obtain the synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft. The synchronous order spectrum of the input shaft, the intermediate shaft and the output shaft is output, which respectively shows the frequency components and amplitudes of different orders in the vibration signal when each shaft is used as a reference.

[0064] Among them, the collected vibration signal is subjected to equal-angle resampling. Equal-angle resampling is a signal processing technology that can convert the time domain signal into a signal related to the gear rotation angle, thereby eliminating the frequency ambiguity caused by the change in gear speed. Through equal-angle resampling, it can be ensured that each sampling point corresponds to a fixed angle of gear rotation, thereby more accurately reflecting the vibration characteristics of the gear. The signal after equal-angle resampling is subjected to variable discrete Fourier transform (VDFT, Variable Discrete Fourier Transform). VDFT is a Fourier transform method that can process non-uniformly sampled data, which is suitable for signals after equal-angle resampling. Through VDFT, the time domain signal can be converted into a frequency domain signal to obtain a mixed order spectrum containing various order components. The mixed order spectrum shows the frequency components and amplitudes of different orders in the vibration signal, which is an important basis for subsequent fault diagnosis. The mixed order spectrum contains the frequency components and amplitude information of each order in the vibration signal. Through equal-angle resampling and VDFT processing, a more accurate mixed order spectrum can be obtained, thereby more accurately identifying the fault feature order and improving the accuracy of fault diagnosis. The equal angle resampling technology can eliminate the frequency ambiguity caused by the change of gear speed, making the fault diagnosis results more reliable, especially suitable for the fault diagnosis of gearboxes with changing speed. VDFT can process non-uniformly sampled data, improve the resolution of the spectrum, and make the frequency components in the mixed order spectrum more clearly identifiable.

[0065] In summary, the embodiment of the present application provides a complete description of the gearbox vibration noise positioning method as follows:

[0066] Step 1: Determine the gearbox shaft tooth number information, input shaft 1, intermediate shaft 2 and output shaft 3; first-stage gear pair: the number of teeth of the first-stage gear driving tooth 4 is 22, and the number of teeth of the first-stage gear driven tooth 5 is 75; second-stage gear pair: the number of teeth of the second-stage gear driving tooth 6 is 21, and the number of teeth of the second-stage 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 order table of the gearbox shaft teeth (the input shaft is used as the reference shaft) 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 block number parameters are shown in Table 3 below.

[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, 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 ) is used to preliminarily identify the characteristic order of the problem; based on the input axis 1, the intermediate axis 2 and the output axis 3 as the reference axis, the rotation angle of the collected vibration signal is resampled at equal angles, and the resampled signal is averaged according to the set number of blocks (as shown in Table 3) to reduce the interference of non-correlated signals. Because the values ​​of non-reference axis related signals (for example, the reference axis is the intermediate axis 2, and the signal caused by the input axis 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 synchronous 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 be 67.5dB maximum when the horizontal axis is 15th order, that is, the characteristic order of the problem has complaints at 15th order. According to the above shaft gear typical order table 1, it is confirmed that 15th order is not a typical order of shaft gear.

[0078] Step 7: Based on Figure 3 , Figure 4 , Figure 5 and Figure 6 The synchronous order spectrum of the input axis 1, the intermediate axis 2 and the output axis 3 at the 15th order mixed and synchronous channel amplitude statistics 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 order, the order corresponding to the intermediate shaft 2 is the 51st order and the amplitude is 67dB, and the order of the output shaft 3 is the 158th order and the amplitude is 50dB. 67dB is greater than 50dB, so the intermediate shaft 2 is the shaft where the faulty part is located, and the scope of the faulty part is narrowed down to the two gears on the intermediate shaft 2, the primary gear driven tooth 5 and the secondary gear driving tooth 6. Through further size detection, 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, it is determined that the tooth where the faulty part is located is the primary gear driven tooth 5;

[0082] Step 9: If based on Figure 3 The mixed order spectrum of the problem determines that the characteristic order is 1, which is the typical order of the shaft gear. Based on Table 1, it is determined that the input shaft 1 is the shaft where the faulty part is located; if based on Figure 3 The mixed order spectrum of the problem determines that the characteristic order is 22, 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 faulty 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 determines that the characteristic order is 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 faulty 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, it means that the driving tooth 6 of the secondary gear is the tooth where the faulty part 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, it means that the driven tooth 7 of the secondary gear is the tooth where the faulty part is located.

[0083] In the second aspect, an embodiment of the present application also provides a gearbox vibration and 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 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 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 its functions and implementation processes will not be repeated here one by one.

[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, the memory, and the communication interface.

[0088] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the gearbox vibration noise locating device, and the interface used to realize the interconnection of the gearbox vibration noise locating device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[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, and the general-purpose processor may call the gearbox vibration noise locating program stored in the memory, and execute the gearbox vibration noise locating method provided in the 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 may 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 on the present application, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[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 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 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 only for description 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 "first", "second" and "third" to different types.

[0097] In the description of the embodiments of the present application, "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 the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[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. The “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 that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed 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 a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially 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, disk, CD) as described above, and includes a number of instructions for 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 are not intended to 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 vibration noise of a gearbox, characterized in that: The gearbox vibration noise positioning method comprises: Acquire the vibration signal of the gearbox under the test condition, perform mixed channel analysis based on the acquired vibration signal to obtain the mixed order spectrum, and perform synchronous channel analysis based on the input shaft, intermediate shaft and output shaft as reference shafts to obtain the synchronous order spectrum of the input shaft, intermediate shaft and output shaft; 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 shaft gears, 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.

2. The gear box vibration noise positioning method according to claim 1, characterized in that: The problem characteristic order is determined based on the mixed order spectrum. If the problem characteristic order is inconsistent with the typical order table of shaft gears, 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 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 primary gear driven tooth 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 and its own design requirement value, it is determined that the tooth where the faulty part is located is the primary gear driven tooth.

3. The gear box vibration noise positioning method according to claim 1, characterized in that: In the step of 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, then after 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, the method includes: If the characteristic order of the problem is consistent with the typical order table of shaft gears, the corresponding component of the fault is determined based on the typical order table of shaft gears.

4. The gear box vibration noise positioning method according to claim 3, characterized in that: The corresponding component of the fault is confirmed based on the typical order table of the shaft gear, including: 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.

5. The gear box vibration noise positioning method according to claim 3, characterized in that: The corresponding component of the fault is confirmed based on the typical order table of the shaft gear, including: 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.

6. The gear box vibration noise positioning method according to claim 3, characterized in that: The corresponding component of the fault is confirmed based on the typical order table of the shaft gear, including: If the faulty corresponding component is determined to be the input shaft, intermediate shaft or output shaft alone based on the typical order table of shaft teeth, then the faulty corresponding component is determined to be the corresponding input shaft, intermediate shaft or output shaft.

7. The gear box vibration noise positioning method according to claim 1, characterized in that: The method of obtaining a vibration signal of the gearbox under the test condition, performing a mixed channel analysis based on the collected vibration signal to obtain a mixed 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, includes: Obtain the vibration signal of the gearbox under the test condition, perform equal-angle resampling based on the acquired vibration signal, and obtain the mixed order spectrum through variable discrete Fourier transform; The input shaft, intermediate shaft and output shaft are used as reference axes to perform equal-angle resample on the collected vibration signals. The signals after equal-angle resample 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 by variable discrete Fourier transform.

8. A gearbox vibration noise positioning device, characterized in that: The gear box vibration noise positioning device comprises: An order spectrum acquisition module is used to acquire the vibration signal of the gearbox under the test condition, perform mixed channel analysis based on the acquired vibration signal to obtain a mixed order spectrum, and perform 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; 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 gear, 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.

9. A gearbox vibration noise positioning device, characterized in that: The gearbox vibration and noise locating device comprises 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 7 are implemented.

10. 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 7 are implemented.

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