Gearbox fault detection method, device, equipment and storage medium

Abstract

The present disclosure relates to a gearbox fault detection method, device, equipment and storage medium. Among them, the gearbox fault detection method includes: obtaining a target order spectrum of a target gearbox; determining a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra; determining the fault order based on the target order spectrum and the target standard order spectrum; and determining the fault location and fault type of the target gearbox based on each fault order. According to the embodiment of the present disclosure, the fault order can be obtained by searching the target order spectrum and the target standard order spectrum, and the fault location and fault type can be determined by analyzing the fault order, which provides data support for the subsequent repair of the faulty gearbox and the analysis of the cause of the fault.

Description

Technical Field

[0001] The present disclosure relates to the field of computer technology, and in particular to a gearbox fault detection method, device, equipment and storage medium. Background Art

[0002] The gearbox is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner. It is a key component in the car. In order to prevent cars equipped with faulty gearboxes from entering the market, the gearbox needs to be tested for faults before leaving the factory.

[0003] At present, the fault detection of gearboxes mainly involves performing noise, vibration and harshness (NVH) tests on the end of line (EOL) test bench to determine whether there are faults or defects in the internal parts of the gearbox. However, for gearboxes including planetary gears, NVH testing cannot locate the location of faulty parts and the type of fault, which brings difficulties to subsequent fault repair and fault cause analysis. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a gearbox fault detection method, device, equipment and storage medium.

[0005] In a first aspect, an embodiment of the present disclosure provides a gearbox fault detection method, the method comprising:

[0006] Obtain a target order spectrum of a target gearbox;

[0007] Determining a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra;

[0008] Determine the fault order based on the target order spectrum and the target standard order spectrum;

[0009] The fault location and fault type of the target gearbox are determined based on each fault order.

[0010] In a second aspect, an embodiment of the present disclosure provides a gearbox fault detection device, comprising:

[0011] A first acquisition module is used to acquire a target order spectrum of a target gearbox;

[0012] A first determination module is used to determine a target standard order spectrum corresponding to a target order spectrum from a plurality of preset standard order spectra;

[0013] A second determination module is used to determine the fault order based on the target order spectrum and the target standard order spectrum;

[0014] The third determination module is used to determine the fault location and fault type of the target gearbox based on each fault order.

[0015] In a third aspect, an embodiment of the present disclosure provides a gearbox fault detection device, comprising:

[0016] processor;

[0017] A memory for storing executable instructions;

[0018] The processor is used to read the executable instructions from the memory and execute the executable instructions to implement the method as described in the first aspect.

[0019] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method described in the first aspect is implemented.

[0020] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0021] The gearbox fault detection method, device, equipment and storage medium provided by the embodiments of the present disclosure can obtain the target order spectrum of the target gearbox, determine the target standard order spectrum corresponding to the target order spectrum from multiple preset standard order spectra, determine the fault order based on the target order spectrum and the target standard order spectrum, and determine the fault location and fault type of the target gearbox based on each fault order. It can be seen that according to the embodiments of the present disclosure, the fault order can be found by searching the target order spectrum and the target standard order spectrum, and the fault location and fault type can be determined by analyzing the fault order, which provides data support for the subsequent repair of the faulty gearbox and the analysis of the cause of the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 is a flow chart of a gearbox fault detection method provided by an embodiment of the present disclosure;

[0025] Figure 2 is a flow chart of a gearbox fault detection process provided by an embodiment of the present disclosure;

[0026] Figure 3 is a structural schematic diagram of a gearbox fault detection device provided by an embodiment of the present disclosure;

[0027] Figure 4 It is a structural schematic diagram of a gearbox fault detection device in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0030] Figure 1 1 is a flow chart of a gearbox fault detection method provided by an embodiment of the present disclosure, which can be performed by a gearbox fault detection device. The gearbox fault detection device can be exemplarily understood as a device such as a tablet computer, a laptop computer, a desktop computer, etc.

[0031] like Figure 1 As shown, the method provided in this embodiment includes the following steps:

[0032] S110, obtaining a target order spectrum of a target gearbox.

[0033] In the embodiment of the present disclosure, when the inspector wants to perform a fault detection on the gearbox, the gearbox fault detection device can be used to detect it. The gearbox fault detection device can first obtain the target order spectrum of the target gearbox, so as to subsequently determine the fault location and fault type of the target gearbox based on the target order spectrum and the target standard order spectrum.

[0034] Specifically, the target gearbox may be any gearbox that includes a planetary gearbox and requires fault detection.

[0035] Specifically, the target gearbox may be a gearbox with a single-stage planetary gearbox, or a gearbox with a multi-stage planetary gearbox, etc., which is not limited here.

[0036] Specifically, the target order spectrum may be an order spectrum of any target gearbox, wherein the order spectrum is used to characterize the correlation between the order and the amplitude, for example, the abscissa of the order spectrum is the order, and the ordinate is the amplitude.

[0037] In some embodiments, the target order spectrum may be an order spectrum sent by other devices and received by the gearbox fault detection device.

[0038] In other embodiments, the target order spectrum may also be an order spectrum obtained by the gearbox fault detection device based on processing of the vibration acceleration signal of the target gearbox.

[0039] In one example, after the target gearbox is assembled, it can enter the EOL test bench, which is equipped with a vibration acceleration sensor. The vibration acceleration sensor is attached to the target gearbox through a cylinder with a certain pressure to collect the vibration acceleration signal during the gearbox NVH test. After receiving the vibration acceleration signal sent by the vibration acceleration sensor, the gearbox fault detection device can perform fast Fourier transform (FFT) and other processing on the vibration acceleration signal to obtain the target order spectrum.

[0040] S120: Determine a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra.

[0041] In the disclosed embodiment, before performing fault detection on the target gearbox, a plurality of preset standard order spectra can be obtained by a gearbox fault detection device or other device, and the plurality of preset standard order spectra can be pre-stored in the gearbox fault detection device. In this way, the gearbox fault detection device can select a target standard order spectrum corresponding to the target order spectrum from the plurality of preset standard order spectra.

[0042] Specifically, the standard order spectrum is an order spectrum determined based on the order spectrum of a qualified gearbox and used as a reference benchmark, wherein different standard order spectra correspond to different test conditions.

[0043] In one example, the process of obtaining multiple preset standard order spectra can be as follows: obtain the order spectra of multiple (for example, greater than or equal to 200) qualified gearboxes under various test conditions. In this way, the multiple order spectra obtained under the same test condition are divided into a group, and for each order, the mean value and standard deviation are calculated based on the amplitude of the order in each order spectrum to obtain the amplitude mean mean and the amplitude standard deviation std, and the standard value corresponding to the order is calculated based on mean+K*std+offset; wherein, those skilled in the art can set the specific values ​​of K and offset according to actual conditions, for example, the value range of K can be greater than or equal to 3 and less than or equal to 5, and the value range of offset can be greater than or equal to 0 and less than or equal to 12, so that when the standard value corresponding to each order is determined, the standard order spectrum corresponding to the test condition can be obtained. By analogy, the standard order spectrum under each test condition can be obtained.

[0044] Specifically, S120 may include: determining the test condition corresponding to the target order spectrum; and determining, from a plurality of preset standard order spectra, a standard order spectrum having the same test condition as that corresponding to the target order spectrum as the target standard order spectrum.

[0045] Optionally, the test conditions may include gear positions and / or operating conditions, wherein the operating conditions may include at least one of acceleration, constant speed, and deceleration, but are not limited thereto.

[0046] In some embodiments, determining a target standard order spectrum corresponding to a target order spectrum from a plurality of preset standard order spectra includes: determining a target gear and a target operating condition corresponding to the target order spectrum; and determining the standard order spectrum corresponding to the target gear and the target operating condition as the target standard order spectrum from a plurality of preset standard order spectra.

[0047] Specifically, the target gear position may be the gear position of the target gearbox when the vibration acceleration signal corresponding to the target order spectrum is obtained.

[0048] Specifically, the target operating condition may be the operating condition of the target gearbox when the vibration acceleration signal corresponding to the target order spectrum is obtained.

[0049] It can be understood that by using the standard order spectrum corresponding to the same gear and working condition as the target order spectrum as the target standard order spectrum, the target standard order spectrum used as a reference benchmark is closer to the order spectrum when the target gearbox is qualified, which is conducive to the subsequent accurate judgment of the fault location and fault type of the target gearbox.

[0050] It can also be understood that since the order spectrum itself has the characteristic of not being affected by the rotational speed, there is no need to consider the rotational speed when obtaining the standard order spectrum, which is conducive to reducing the workload of obtaining the standard order spectrum. At the same time, it is also convenient to quickly determine the target standard order spectrum corresponding to the target order spectrum, which is conducive to improving fault detection efficiency.

[0051] S130: Determine the fault order based on the target order spectrum and the target standard order spectrum.

[0052] In the embodiment of the present disclosure, the gearbox fault detection device may use the target standard order spectrum as a reference benchmark and determine the fault order based on the target order spectrum and the target standard order spectrum.

[0053] Specifically, the difference between the amplitude of the fault order in the target order spectrum and the amplitude of the fault order in the target standard order spectrum is greater than a preset amplitude difference threshold. The specific value of the preset amplitude difference threshold can be determined by those skilled in the art according to the tolerable amplitude difference, which is not limited here.

[0054] Optionally, based on the target order spectrum and the target standard order spectrum, determining the fault order may include: S131, selecting at least one order from the target order spectrum as the target order.

[0055] In some embodiments, each order in the order spectrum can be used as a target order. In this way, all fault orders can be determined, providing detailed data support for subsequent analysis of fault location, fault type and fault cause.

[0056] In other embodiments, the main order, multiple frequency, and side frequency corresponding to each planetary gear in the target gearbox are determined as the target order.

[0057] Specifically, since the standard order spectrum is obtained based on the order spectra of a large number of qualified gearboxes, the main order offset (f m ±f c ), where f m is the meshing frequency of the planetary gear, f c Therefore, the main order mentioned here is the main order with the largest meshing energy of the planetary gear obtained by actual testing, rather than the meshing order determined by the structure of the planetary gear itself.

[0058] Specifically, the frequency multiplication is an integer multiple of the main order.

[0059] Specifically, the side frequencies include side frequencies corresponding to the main order and side frequencies corresponding to the multiple frequencies, wherein the side frequencies corresponding to the main order are orders whose difference with the main order is less than or equal to the preset order difference, and the side frequencies corresponding to the multiple frequencies are orders whose difference with the integer multiple of the main order is less than or equal to the preset order difference. The specific value of the preset order difference can be set by those skilled in the art according to the rotation speed of the planetary gear in the gearbox, etc., and is not limited here.

[0060] It is understandable that when a gearbox fails, it usually causes abnormal amplitudes of the main order, multiple frequency, and side frequency corresponding to the planetary gear. Therefore, targeted detection of these orders can not only derive the fault order for analyzing the fault location and fault type, but also quickly lock the fault order, which is conducive to improving detection efficiency.

[0061] S132. For each target order, calculate the difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum to obtain the amplitude difference.

[0062] S133. When the amplitude difference is greater than or equal to a preset amplitude difference threshold, determine the target order corresponding to the amplitude difference as the fault order.

[0063] Specifically, for each target order, the difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum is calculated to obtain the amplitude difference. When the amplitude difference is greater than or equal to the preset amplitude difference threshold, the target order is determined as a fault order; when the amplitude difference is less than the preset amplitude difference threshold, the target order is determined as a non-abnormal order.

[0064] S140: Determine the fault location and fault type of the target gearbox based on each fault order.

[0065] In the disclosed embodiment, after determining the fault order, the gearbox fault detection device can determine the fault location and fault type of the target gearbox by analyzing the fault order.

[0066] Specifically, during the production process of the gearbox, gear parts with serious faults, such as large gear bumps, broken teeth, tooth surface cracks or burns, are generally not assembled into the gearbox. Therefore, the embodiments of the present invention are mainly aimed at fault detection of gearboxes with local faults and distributed faults, among which local faults are mainly manifested as slight bumps at individual tooth tops or tooth profiles, while distributed faults are mainly manifested as parameters of the gear parts themselves being out of tolerance or unqualified, such as the gear tooth profile parameter deviation is large or does not meet the accuracy requirements. In addition, the position of each planetary gear shaft on the planetary carrier and the support stability of the components will also cause the planetary gear meshing noise problem.

[0067] Specifically, in the disclosed embodiment, the fault position and fault type can be located based on whether there is a fault order of multiple frequency, the fixing condition of the ring gear of the planetary gear corresponding to the fault order, and / or the fault frequency, etc. In addition, the specific fault type can also be determined, but it is not limited to this. Typical examples will be described in detail later, and will not be described here.

[0068] The gearbox fault detection method provided by the embodiment of the present disclosure can obtain the target order spectrum of the target gearbox, determine the target standard order spectrum corresponding to the target order spectrum from multiple preset standard order spectra, determine the fault order based on the target order spectrum and the target standard order spectrum, and determine the fault location and fault type of the target gearbox based on each fault order. It can be seen that according to the embodiment of the present disclosure, the fault order can be found by searching the target order spectrum and the target standard order spectrum, and the fault location and fault type can be determined by analyzing the fault order, which provides data support for the subsequent repair of the faulty gearbox and the analysis of the cause of the fault.

[0069] In yet another embodiment of the present disclosure, determining the fault location and fault type of the target gearbox based on each fault order includes: detecting whether there is a fault order of frequency doubling; when detecting the existence of a fault order of frequency doubling, determining the fault order of frequency doubling as the first fault order, and determining the planetary gearbox corresponding to the first fault order as the first fault planetary gearbox.

[0070] In the disclosed embodiment, after determining the fault order, the gearbox fault detection device can detect whether there is a fault order of multiple frequency in each fault order. When there is a fault order of multiple frequency, it indicates that there may be problems such as part ellipse, eccentricity or shaft misalignment in the planetary gear meshing process. At this time, the fault position and fault type can be further located in combination with the fixing condition of the gear ring.

[0071] Specifically, for each fault order, it can be detected whether it is a frequency doubling. When a frequency doubling fault order is detected, the frequency doubling fault order can be determined as the first fault order, and the planetary gear corresponding to the frequency doubling fault order can be determined as the first faulty planetary gear. That is, at this time, it can be determined that the first faulty planetary gear corresponding to the frequency doubling fault order has a fault, and subsequently the fault position and fault type can be further located based on the fixing condition of the gear ring of the first faulty planetary gear.

[0072] The following will be combined with a typical example to explain how to accurately determine the fault position and fault type in the first faulty planetary gear when a fault order of multiple frequency is detected and the ring gear of the first faulty planetary gear is fixed. However, this does not constitute a limitation on the embodiments of the present disclosure.

[0073] Optionally, when the ring gear of the first faulty planetary gear set is fixed, the number of first fault orders corresponding to the first faulty planetary gear set is counted; and based on the number of first fault orders, the fault position and fault type of the first faulty planetary gear set are determined.

[0074] Specifically, a planetary gear generally includes a sun gear, a planetary gear, a ring gear, and a planet carrier. When the ring gear is fixed, the sun gear rotates around its own central axis, and the planetary gear not only rotates on its own, but also revolves around the sun gear. The planetary gear meshes with both the sun gear and the ring gear. Based on this, for each first fault planetary gear, the number of first fault orders corresponding to the first fault planetary gear in each fault order can be counted, and based on the number of first fault orders, the fault position and fault type of the first fault planetary gear can be determined.

[0075] In some embodiments, determining the fault position and fault type of the first fault planetary gear set based on the number of first fault orders may include: when the number of first fault orders is greater than or equal to the number of planetary gears in the first fault planetary gear set, determining that the ring gear of the first fault planetary gear set is positioned eccentrically.

[0076] Specifically, the applicant has found through research that during the meshing process of the planetary gear, each planetary gear will generate modulation when passing through the ring gear, resulting in an increase in the frequency multiple, and is not affected by the transmission path. Based on this, it can be seen that when the number of first fault orders is greater than or equal to the number of planetary gears in the first fault planetary gear, it indicates that each planetary gear passing through the ring gear causes the amplitude corresponding to the frequency multiple to exceed the reference reference. At this time, it can be determined that the ring gear of the first fault planetary gear is positioned eccentrically.

[0077] In other embodiments, based on the number of first fault orders, determining the fault position and fault type of the first fault planetary gear train may include: when the number of first fault orders is less than the number of planetary gears in the first fault planetary gear train, calculating the difference between the first fault order and the fault order corresponding to the first fault order as the side frequency, to obtain the fault characteristic frequency; when the fault characteristic frequency is equal to the rotational frequency of the planet carrier in the first fault planetary gear train, determining that the planetary gear position of the first fault planetary gear train is faulty; when the fault characteristic frequency is equal to the rotational frequency of the sun gear in the first fault planetary gear train, determining that the sun gear radial jump or support coaxiality of the first fault planetary gear train is faulty.

[0078] Specifically, during the meshing process of the planetary gear, not all planetary gears mesh with the sun gear at the same time, and generally 2-3 planetary gears mesh with the sun gear at the same time. Therefore, optionally, when the number of the first fault order is less than the number of the planetary gears in the first fault planetary gear, it can include: when the number of the first fault order is less than 3.

[0079] Specifically, among the fault orders, find the fault order that meets the following conditions: it is the side frequency corresponding to the first fault order and has the smallest difference with the first fault order; calculate the difference between the first fault order and the fault order (i.e., the fault order that meets these two conditions) to obtain the fault characteristic frequency.

[0080] Specifically, the applicant has found through research that frequency multiplication is generated due to modulation during the meshing process of the planetary gears, the ring gear and the sun gear on the planetary gear train. When the fault characteristic frequency is equal to the rotation frequency of the planet carrier of the first faulty planetary gear train, the strength of the meshing vibration signal of the planetary gears and the ring gear in the first faulty planetary gear train will change according to the rotation of the planetary gear train, so that an obvious envelope signal of the rotation frequency of the planet carrier appears in the order spectrum. At this time, it can be determined that the planetary gear position of the first faulty planetary gear train is faulty.

[0081] Specifically, the applicant has also found through research that the frequency multiplication is generated due to modulation during the meshing process of the planetary gears, the ring gear and the sun gear on the planetary gear set, and its vibration signal will not be affected by the transmission path. When the fault characteristic frequency is equal to the rotation frequency of the sun gear of the first faulty planetary gear set, the strength of the meshing vibration signal of the planetary gear, the ring gear and the sun gear will change according to the rotation of the sun gear, so that an obvious envelope signal of the rotation frequency of the sun gear appears in the order spectrum. At this time, it can be determined that the sun gear of the first faulty planetary gear set has a radial jump or a support coaxiality failure, wherein the support coaxiality failure may include poor coaxiality or unstable support, etc., resulting in misalignment.

[0082] In the following, a typical example will be used to describe how to accurately determine the fault position and fault type in the first faulty planetary gear when a fault order of multiple frequency is detected and the ring gear of the first faulty planetary gear is not fixed. However, this does not constitute a limitation on the embodiments of the present disclosure.

[0083] Optionally, when there is a fault order that is a multiple frequency and the ring gear of the first fault planetary row is not fixed, the difference between the first fault order and the fault order that is the side frequency corresponding to the first fault order is calculated to obtain the fault characteristic frequency; when the fault characteristic frequency is equal to the rotational frequency of the planetary carrier in the first fault planetary row, it is determined that the position of the planetary pin hole on the planetary carrier of the first fault planetary row is out of tolerance; when the fault characteristic frequency is equal to the rotational frequency of the ring gear in the first fault planetary row, it is determined that the ring gear diameter jump of the first fault planetary row has a fault; when the fault characteristic frequency is equal to the rotational frequency of the sun gear in the first fault planetary row, it is determined that the support coaxiality of the first fault planetary row has a fault.

[0084] Specifically, the specific method for calculating the fault characteristic frequency is described above and will not be repeated here.

[0085] Specifically, the applicant has discovered through research that when the ring gear of the first faulty planetary gearbox is not fixed, the vibration acceleration signal of the target gearbox to which it belongs will be accompanied by an amplitude modulation signal caused by the pass-through effect, resulting in an obvious envelope signal appearing in the order spectrum. At this time, the specific fault location and fault type can be determined by calculating the fault characteristic frequency on the transmission path.

[0086] It can be understood that when a fault frequency of multiple frequency is detected, the above-mentioned fault location strategy can accurately locate which part in the first faulty planetary gear has failed, and the fault type of the faulty part can be determined, providing an accurate basis for the subsequent repair of the first faulty planetary gear.

[0087] In another embodiment of the present disclosure, the method also includes: when it is detected that there is no fault order that is a double frequency, the fault order that is the main order is determined as the second fault order, and the planetary gear corresponding to the second fault order is determined as the second fault planetary gear; based on the amplitude of the second fault order and the amplitude of the fault order corresponding to the side frequency of the second fault order, it is determined whether there is a main order offset in the second fault planetary gear.

[0088] In the disclosed embodiment, after determining the fault order, the gearbox fault detection device can detect whether there is a fault order of multiple frequency in each fault order. When there is no fault order of multiple frequency, the fault position and fault type can be further located based on whether there is a main order offset, the fixing condition of the gear ring, etc.

[0089] Specifically, the fault order of the main order is determined as the second fault order, and the planetary gear corresponding to the second fault order is determined as the second fault planetary gear. That is, it can be determined that the second fault planetary gear including the fault order of the main order has a fault.

[0090] Specifically, for each second fault order, find a fault order that meets the following conditions: it is the side frequency corresponding to the second fault order and the fault order with the smallest difference with the second fault order; when the amplitude of the fault order (i.e., the fault order that meets these two conditions) is greater than or equal to the amplitude of its corresponding second fault order, it indicates that there is a main order offset; when the amplitude of the order is less than the amplitude of its corresponding second fault order, it indicates that there is no main order offset.

[0091] The following will be combined with a typical example to explain how to accurately determine the fault position and fault type in the second fault planetary gear when it is detected that there is no fault order that is a double frequency and no main order offset. However, this does not constitute a limitation on the embodiments of the present disclosure.

[0092] Specifically, the applicant has found through research that when there is no main-order offset, it indicates that there is an impact signal caused by a local fault during the planetary gear meshing process.

[0093] Optionally, when there is no main order offset, it is detected whether there is a modulation phenomenon in the target order spectrum; when there is no modulation phenomenon in the target order spectrum, it is determined that there is a local fault in the ring gear of the second faulty planetary gear.

[0094] Specifically, the applicant has discovered through research that when there is no obvious modulation phenomenon in the target order spectrum, the second faulty planetary gear train corresponds to a faulty order, which is mainly caused by the meshing vibration energy of the second faulty planetary gear train itself. It can be determined that there is a local fault in the ring gear of the second faulty planetary gear train, such as a slight bump on the ring gear of the second faulty planetary gear train.

[0095] It should be noted that the modulation of the target order spectrum is mainly for the modulation of the amplitude of the frequency multiples and the side frequencies. The "obvious modulation phenomenon" mentioned here and the "obvious envelope signal" mentioned below mean that the difference between the maximum value of the envelope signal and the main frequency is less than the preset difference; wherein, the preset difference can be set by technicians in this field according to actual conditions, for example, it can be obtained based on experience.

[0096] Optionally, when there is no main order offset and there is modulation in the target order spectrum, the difference between the second fault order and the fault order corresponding to the side frequency of the second fault order is calculated to obtain the fault characteristic frequency; when the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second fault planetary gear, it is determined that a local fault occurs in the planetary gear of the second fault planetary gear; when the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second fault planetary gear, it is determined that a local fault occurs in the sun gear of the second fault planetary gear.

[0097] Specifically, the applicant has found through research that when an obvious envelope signal appears in the target order spectrum, the specific fault location and fault type can be determined by calculating the fault characteristic frequency.

[0098] Specifically, the specific method for calculating the fault characteristic frequency is described above and will not be repeated here.

[0099] The following will be combined with a typical example to explain how to accurately determine the fault position and fault type in the second fault planetary gear when it is detected that there is no fault order for the double frequency and there is a main order offset. However, this does not constitute a limitation on the embodiments of the present disclosure.

[0100] Specifically, the applicant has discovered through research that when there is a main order offset, it indicates that there is a distributed fault in a part of the second faulty planetary gearbox, and its modulation signal causes the main order to be modulated by the fault characteristic frequency. At this time, the specific fault location and fault type can be determined by calculating the fault characteristic frequency.

[0101] Optionally, when there is a main order offset and the ring gear of the second fault planetary gear is fixed, the difference between the second fault order and the fault order corresponding to the side frequency of the second fault order is calculated to obtain the fault characteristic frequency; when the fault characteristic frequency is equal to the rotational frequency of the planetary gear in the second fault planetary gear, it is determined that the planetary gear of the second fault planetary gear has a distributed fault; when the fault characteristic frequency is equal to the rotational frequency of the sun gear in the second fault planetary gear, it is determined that the sun gear of the second fault planetary gear has a distributed fault.

[0102] Specifically, the specific method for calculating the fault characteristic frequency is described above and will not be repeated here.

[0103] Optionally, when there is a main order offset and the ring gear of the second fault planetary gear is not fixed, the difference between the second fault order and the fault order corresponding to the second fault order as the side frequency is calculated to obtain the fault characteristic frequency; when the fault characteristic frequency is equal to N×f c ±f p When , it is determined that the planetary gear of the second faulty planetary gear has a distributed fault; f c is the rotation frequency of the planet carrier of the second faulty planetary gear, f p is the rotation frequency of the planetary gear of the second fault planetary gear, N is a positive integer; when the fault characteristic frequency is equal to N×f c ±f s When , it is determined that the sun gear of the second faulty planetary gear has a distributed fault; f s It is the rotation frequency of the sun gear of the second faulty planetary gear.

[0104] Specifically, the specific method for calculating the fault characteristic frequency is described above and will not be repeated here.

[0105] Specifically, N=1 and N=2 may be substituted into the above calculation formula for calculation, but the present invention is not limited thereto.

[0106] It can be understood that the embodiment of the present invention performs fault location and fault type detection based on the target order spectrum. Due to the characteristics of the order spectrum itself (such as the resolution characteristics of the order spectrum, the characteristics that the influence of the rotational speed can be ignored, etc.), compared with fault location and fault type detection based on the frequency spectrum, the number of signals that need to be analyzed can be reduced, that is, the value of N is smaller, which is beneficial to improving detection efficiency.

[0107] It can also be understood that when it is detected that there is no fault frequency that is a multiple of the frequency, the above-mentioned fault location strategy can accurately locate which part in the second faulty planetary gear has a fault, and the fault type of the faulty part can be determined, providing an accurate basis for the subsequent repair of the second faulty planetary gear.

[0108] Below, the gearbox fault detection method provided by the embodiment of the present disclosure will be described in detail based on a specific example.

[0109] Figure 2 It is a flow chart of a gearbox fault detection process provided by an embodiment of the present disclosure.

[0110] like Figure 2 As shown, the gearbox fault detection process may specifically include the following steps.

[0111] S2010: Obtain a target order spectrum of a target gearbox.

[0112] S2020. Determine a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra.

[0113] Optionally, S2020 may include determining a target gear and a target operating condition corresponding to the target order spectrum; and determining a standard order spectrum corresponding to the target gear and the target operating condition as a target standard order spectrum from a plurality of preset standard order spectra.

[0114] S2030: Determine the fault order based on the target order spectrum and the target standard order spectrum.

[0115] Optionally, S2030 may include: selecting at least one order from the target order spectrum as the target order; for each target order, calculating the difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum to obtain an amplitude difference; when the amplitude difference is greater than or equal to a preset amplitude difference threshold, determining the target order corresponding to the amplitude difference as a fault order.

[0116] S2040, check whether there is a fault order of frequency doubling. If so, execute S2050; if not, execute S2150.

[0117] S2050: Determine the fault order of the doubled frequency as the first fault order, and determine the planetary gear corresponding to the first fault order as the first fault planetary gear.

[0118] S2060: When the ring gear of the first faulty planetary gear set is fixed, count the number of first fault orders corresponding to the first faulty planetary gear set.

[0119] S2070: When the number of the first fault order is greater than or equal to the number of the planetary gears in the first faulty planetary gear set, determine that the ring gear of the first faulty planetary gear set is positioned eccentrically.

[0120] S2080: When the number of first fault orders is less than the number of planetary gears in the first fault planetary gear array, calculate the difference between the first fault order and the fault order corresponding to the first fault order which is the side frequency, to obtain the fault characteristic frequency.

[0121] S2090: When the fault characteristic frequency is equal to the rotation frequency of the planet carrier in the first faulty planetary gear, determine that the planetary gear position of the first faulty planetary gear is faulty.

[0122] S2100: When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the first faulty planetary gear, it is determined that the sun gear of the first faulty planetary gear has a radial runout or a support coaxiality fault.

[0123] S2110. When the ring gear of the first fault planetary gear set is not fixed, calculate the difference between the first fault order and the fault order corresponding to the first fault order which is the side frequency, to obtain the fault characteristic frequency.

[0124] S2120: When the fault characteristic frequency is equal to the rotation frequency of the planet carrier in the first faulty planetary gear, determine that the position of the planetary gear pin hole on the planet carrier of the first faulty planetary gear is out of tolerance.

[0125] S2130: When the fault characteristic frequency is equal to the rotation frequency of the ring gear in the first faulty planetary gear set, it is determined that a radial jump fault occurs in the ring gear of the first faulty planetary gear set.

[0126] S2140: When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the first faulty planetary gear, it is determined that the support coaxiality of the first faulty planetary gear is faulty.

[0127] S2150: Determine the fault order of the main order as the second fault order, and determine the planetary gear corresponding to the second fault order as the second fault planetary gear.

[0128] S2160: Based on the amplitude of the second fault order and the amplitude of the fault order corresponding to the side frequency of the second fault order, determine whether the second fault planetary gear has a main order offset. If not, execute S2170; if so, execute S2220.

[0129] S2170, detect whether there is a modulation phenomenon in the target order spectrum. If not, execute S2180; if so, execute S2190.

[0130] S2180. Determine that there is a local fault in the ring gear of the second faulty planetary gear set.

[0131] S2190, calculating the difference between the second fault order and the fault order corresponding to the second fault order which is the side frequency, to obtain the fault characteristic frequency.

[0132] S2000: When the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear, determine that a local fault occurs in the planetary gear of the second faulty planetary gear.

[0133] S2210: When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear, it is determined that a local fault occurs in the sun gear of the second faulty planetary gear.

[0134] S2220: Detect whether the ring gear of the second faulty planetary gear set is fixed. If so, execute S2230; if not, execute S2260.

[0135] S2230, calculating the difference between the second fault order and the fault order corresponding to the second fault order which is the side frequency, to obtain the fault characteristic frequency.

[0136] S2240: When the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear, it is determined that a distributed fault occurs in the planetary gear of the second faulty planetary gear.

[0137] S2250: When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear, it is determined that a distributed fault occurs in the sun gear of the second faulty planetary gear.

[0138] S2260, calculating the difference between the second fault order and the fault order corresponding to the second fault order which is the side frequency, to obtain the fault characteristic frequency.

[0139] S2270, when the fault characteristic frequency is equal to N×f c ±f p It is determined that a distributed fault occurs in the planetary gear of the second faulty planetary row.

[0140] Among them, f c is the rotation frequency of the planet carrier of the second faulty planetary gear, f p is the rotation frequency of the planetary gear of the second faulty planetary gear, and N is a positive integer;

[0141] S2280, when the fault characteristic frequency is equal to N×f c ±f s It is determined that a distributed fault occurs in the sun gear of the second faulty planetary row.

[0142] Among them, f s It is the rotation frequency of the sun gear of the second faulty planetary gear.

[0143] The gearbox fault detection method provided in the embodiment of the present disclosure can determine the fault order based on the target order spectrum and the target standard order spectrum, and locate the precise fault location and fault type based on the fault order, thereby providing data support for the subsequent repair of the faulty gearbox and the analysis of the cause of the fault.

[0144] Figure 3 is a schematic diagram of the structure of a gearbox fault detection device provided by an embodiment of the present disclosure, and the gearbox fault detection device can be understood as the above-mentioned gearbox fault detection device or a part of the functional modules in the above-mentioned gearbox fault detection device. Figure 3 As shown, the gearbox fault detection device 300 includes:

[0145] A first acquisition module 310 is used to acquire a target order spectrum of a target gearbox;

[0146] A first determination module 320 is used to determine a target standard order spectrum corresponding to a target order spectrum from a plurality of preset standard order spectra;

[0147] A second determination module 330 is used to determine the fault order based on the target order spectrum and the target standard order spectrum;

[0148] The third determination module 340 is used to determine the fault location and fault type of the target gearbox based on each fault order.

[0149] The gearbox fault detection device provided by the embodiment of the present disclosure can obtain the target order spectrum of the target gearbox, determine the target standard order spectrum corresponding to the target order spectrum from multiple preset standard order spectra, determine the fault order based on the target order spectrum and the target standard order spectrum, and determine the fault position and fault type of the target gearbox based on each fault order. It can be seen that according to the embodiment of the present disclosure, the fault order can be found by searching the target order spectrum and the target standard order spectrum, and the fault position and fault type can be determined by analyzing the fault order, which provides data support for the subsequent repair of the faulty gearbox and the analysis of the cause of the fault.

[0150] In another embodiment of the present disclosure, the first determining module 320 includes:

[0151] The first determination submodule is used to determine the target gear position and target operating condition corresponding to the target order spectrum.

[0152] The second determination submodule is used to determine the standard order spectrum corresponding to the target gear position and the target operating condition as the target standard order spectrum from a plurality of preset standard order spectra.

[0153] In yet another embodiment of the present disclosure, the second determining module 330 includes:

[0154] A first selection submodule is used to select at least one order from the target order spectrum as a target order;

[0155] A first calculation submodule is used to calculate, for each target order, a difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum to obtain an amplitude difference;

[0156] The third determination submodule is used to determine the target order corresponding to the amplitude difference as the fault order when the amplitude difference is greater than or equal to a preset amplitude difference threshold.

[0157] In yet another embodiment of the present disclosure, the third determining module 340 includes:

[0158] The first detection submodule is used to detect whether there is a fault order of frequency doubling;

[0159] A fourth determination submodule is used to, when detecting the presence of a fault order of frequency doubling, determine the fault order of frequency doubling as a first fault order, and determine the planetary gear corresponding to the first fault order as a first faulty planetary gear;

[0160] A first statistical submodule, used for counting the number of first fault orders corresponding to the first fault planetary gear train when the ring gear of the first fault planetary gear train is fixed;

[0161] The fifth determination submodule is used to determine the fault position and fault type of the first faulty planetary gearbox based on the number of the first fault order.

[0162] In yet another embodiment of the present disclosure, the fifth determining submodule includes:

[0163] A first determination unit, configured to determine the positioning eccentricity of the ring gear of the first fault planetary gear when the number of the first fault order is greater than or equal to the number of the planetary gears in the first fault planetary gear;

[0164] A first calculation unit is used to calculate the difference between the first fault order and the fault order corresponding to the first fault order as the side frequency when the number of the first fault order is less than the number of planetary gears in the first fault planetary gear set, so as to obtain the fault characteristic frequency;

[0165] A second determination unit is used to determine that the planetary gear position of the first faulty planetary gear is faulty when the fault characteristic frequency is equal to the rotation frequency of the planet carrier in the first faulty planetary gear;

[0166] The third determination unit is used to determine that the sun wheel radial runout or support coaxiality of the first faulty planetary gear set has a fault when the fault characteristic frequency is equal to the rotation frequency of the sun wheel in the first faulty planetary gear set.

[0167] In another embodiment of the present disclosure, the device further comprises:

[0168] A second calculation submodule is used to calculate the difference between the first fault order and the fault order corresponding to the first fault order which is the side frequency when it is detected that there is a fault order which is a double frequency and the ring gear of the first fault planetary gear is not fixed, so as to obtain the fault characteristic frequency;

[0169] A sixth determination submodule is used to determine that the position error of the planetary gear pin hole on the planetary carrier of the first faulty planetary gear is out of tolerance when the fault characteristic frequency is equal to the rotation frequency of the planetary carrier in the first faulty planetary gear;

[0170] A seventh determination submodule determines that a fault occurs in the ring gear radial jump of the first faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the ring gear in the first faulty planetary gear;

[0171] The eighth determination submodule determines that a support coaxiality failure occurs in the first faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the sun gear in the first faulty planetary gear.

[0172] In another embodiment of the present disclosure, the device further comprises:

[0173] A ninth determination submodule, configured to determine the fault order of the main order as the second fault order, and determine the planetary gear corresponding to the second fault order as the second fault planetary gear when it is detected that there is no fault order of the double frequency.

[0174] a tenth determination submodule, configured to determine whether the second fault planetary gear has a main order deviation based on the amplitude of the second fault order and the amplitude of the fault order corresponding to the side frequency of the second fault order;

[0175] The second detection submodule is used to detect whether there is a modulation phenomenon in the target order spectrum when there is no main order offset;

[0176] The eleventh determination submodule is used to determine that a local fault exists in the ring gear of the second faulty planetary gear when there is no modulation phenomenon in the target order spectrum.

[0177] In another embodiment of the present disclosure, the device further comprises:

[0178] The third calculation submodule is used to calculate the difference between the second fault order and the fault order corresponding to the second fault order which is the side frequency when there is no main order offset and there is modulation in the target order spectrum, so as to obtain the fault characteristic frequency;

[0179] A twelfth determination submodule is used to determine that a local fault occurs in the planetary gear of the second faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear;

[0180] The thirteenth determination submodule is used to determine that a local fault occurs in the sun gear of the second faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear.

[0181] In another embodiment of the present disclosure, the device further comprises:

[0182] A fourth calculation submodule is used to calculate the difference between the second fault order and the fault order corresponding to the second fault order which is the side frequency when there is a main order offset and the ring gear of the second fault planetary gear is fixed, so as to obtain a fault characteristic frequency;

[0183] A fourteenth determination submodule is used to determine that a distributed fault occurs in the planetary gear of the second faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear;

[0184] The fifteenth determination submodule is used to determine that a distributed fault occurs in the sun gear of the second faulty planetary gear when the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear.

[0185] In another embodiment of the present disclosure, the device further comprises:

[0186] A fifth calculation submodule, configured to calculate the difference between the second fault order and the fault order corresponding to the second fault order which is a side frequency when there is a main order offset and the ring gear of the second fault planetary gear is not fixed, so as to obtain a fault characteristic frequency;

[0187] The sixteenth determination submodule is used to determine the fault characteristic frequency equal to N×f c ±f p When , it is determined that the planetary gear of the second faulty planetary gear has a distributed fault; where f c is the rotation frequency of the planet carrier of the second faulty planetary gear, f p is the rotation frequency of the planetary gear of the second faulty planetary gear, and N is a positive integer;

[0188] The seventeenth determination submodule is used to determine the fault characteristic frequency equal to N×f c ±f s When , it is determined that the sun gear of the second faulty planetary gear has a distributed fault; f s It is the rotation frequency of the sun gear of the second faulty planetary gear.

[0189] The device provided in this embodiment can perform the above Figure 1 and Figure 2 The method of any embodiment has similar execution mode and beneficial effects, which will not be described in detail here.

[0190] For example, Figure 4 Schematic diagram of a gearbox fault detection device in an embodiment of the present disclosure. Figure 4 , which shows a schematic diagram of a structure suitable for implementing a gearbox fault detection device 400 in an embodiment of the present disclosure. The gearbox fault detection device 400 in an embodiment of the present disclosure may include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The gearbox fault detection device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0191] like Figure 4 As shown, the gearbox fault detection device 400 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage device 408 to a random access memory (RAM) 403. In the RAM 403, various programs and data required for the operation of the gearbox fault detection device 400 are also stored. The processing device 401, the ROM 402, and the RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0192] Typically, the following devices may be connected to the I / O interface 405: input devices 406 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 407 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 408 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 409. The communication device 409 may allow the gearbox fault detection device 400 to communicate with other devices wirelessly or by wire to exchange data. Although Figure 4 The gearbox fault detection apparatus 400 having various devices is shown, but it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have instead.

[0193] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 409, or installed from the storage device 408, or installed from the ROM 402. When the computer program is executed by the processing device 401, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0194] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0195] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0196] The computer-readable medium may be included in the gearbox fault detection device; or may exist independently without being assembled into the gearbox fault detection device.

[0197] The computer-readable medium carries one or more programs. When the one or more programs are executed by the gearbox fault detection device, the gearbox fault detection device: obtains a target order spectrum of a target gearbox; determines a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra; determines a fault order based on the target order spectrum and the target standard order spectrum; and determines a fault location and a fault type of the target gearbox based on each fault order.

[0198] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0199] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0200] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0201] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0202] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0203] The present disclosure also provides a computer-readable storage medium in which a computer program is stored. When the computer program is executed by a processor, the above-mentioned Figure 1 and Figure 2 The method of any embodiment has similar execution mode and beneficial effects, which will not be described in detail here.

[0204] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0205] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gearbox fault detection method, characterized in that: include: Obtain a target order spectrum of a target gearbox; Determining a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra; Based on the target order spectrum and the target standard order spectrum, determining the fault order includes: selecting at least one order from the target order spectrum as the target order; for each target order, calculating the difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum to obtain an amplitude difference; when the amplitude difference is greater than or equal to a preset amplitude difference threshold, determining the target order corresponding to the amplitude difference as the fault order; Based on each of the fault orders, determining the fault location and fault type of the target gearbox includes: Detecting whether there is the fault order of the multiplied frequency; When the fault order of frequency doubling is detected, the fault order of frequency doubling is determined as a first fault order, and the planetary gear corresponding to the first fault order is determined as a first faulty planetary gear; When the ring gear of the first faulty planetary gear set is fixed, counting the number of the first fault orders corresponding to the first faulty planetary gear set; Based on the number of the first fault order, a fault position and a fault type of the first faulty planetary gear are determined.

2. The gearbox fault detection method according to claim 1, characterized in that: The step of determining a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra comprises: Determining a target gear position and a target operating condition corresponding to the target order spectrum; From a plurality of preset standard order spectra, the standard order spectrum corresponding to the target gear position and the target operating condition is determined as the target standard order spectrum.

3. The gearbox fault detection method according to claim 1, characterized in that: The determining the fault position and fault type of the first fault planetary gear train based on the number of the first fault order comprises: When the number of the first fault orders is greater than or equal to the number of planetary gears in the first faulty planetary gear set, determining that the ring gear of the first faulty planetary gear set is positioned eccentrically; When the number of the first fault order is less than the number of planetary gears in the first fault planetary gear set, calculating the difference between the first fault order and the fault order corresponding to the first fault order as the side frequency to obtain a fault characteristic frequency; When the fault characteristic frequency is equal to the rotation frequency of the planet carrier in the first faulty planetary gear, determining that the planetary gear position of the first faulty planetary gear is faulty; When the fault characteristic frequency is equal to the rotation frequency of the sun wheel in the first faulty planetary gear set, it is determined that the sun wheel radial runout or the support coaxiality of the first faulty planetary gear set is faulty.

4. The gearbox fault detection method according to claim 1, characterized in that: The method further comprises: When it is detected that there is the fault order which is a multiple frequency and the ring gear of the first fault planetary gear set is not fixed, a difference between the first fault order and the fault order which is a side frequency corresponding to the first fault order is calculated to obtain a fault characteristic frequency; When the fault characteristic frequency is equal to the rotation frequency of the planet carrier in the first faulty planetary gear, determining that the position of the planetary gear pin hole on the planet carrier of the first faulty planetary gear is out of tolerance; When the fault characteristic frequency is equal to the rotation frequency of the ring gear in the first faulty planetary gear set, it is determined that the ring gear of the first faulty planetary gear set has a fault due to radial jump; When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the first faulty planetary gear set, it is determined that a support coaxiality fault occurs in the first faulty planetary gear set.

5. The gearbox fault detection method according to claim 1, characterized in that: The method further comprises: When it is detected that the fault order that is the frequency multiplication does not exist, the fault order that is the main order is determined as the second fault order, and the planetary gear corresponding to the second fault order is determined as the second fault planetary gear; Determining whether the second fault planetary gear has a main order deviation based on the amplitude of the second fault order and the amplitude of the fault order corresponding to the side frequency of the second fault order; When there is no main order offset, detecting whether there is a modulation phenomenon in the target order spectrum; When there is no modulation phenomenon in the target order spectrum, it is determined that a local fault exists in the ring gear of the second faulty planetary gear set.

6. The gearbox fault detection method according to claim 5, characterized in that: The method further comprises: When there is no main order offset and there is a modulation phenomenon in the target order spectrum, calculating the difference between the second fault order and the fault order corresponding to the second fault order which is a side frequency, to obtain a fault characteristic frequency; When the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear, it is determined that a local fault occurs in the planetary gear of the second faulty planetary gear; When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear, it is determined that a local fault occurs in the sun gear of the second faulty planetary gear.

7. The gearbox fault detection method according to claim 5, characterized in that: The method further comprises: When there is a main order offset and the ring gear of the second fault planetary gear is fixed, calculating the difference between the second fault order and the fault order corresponding to the second fault order as a side frequency to obtain a fault characteristic frequency; When the fault characteristic frequency is equal to the rotation frequency of the planetary gear in the second faulty planetary gear, it is determined that a distributed fault occurs in the planetary gear of the second faulty planetary gear; When the fault characteristic frequency is equal to the rotation frequency of the sun gear in the second faulty planetary gear, it is determined that a distributed fault occurs in the sun gear of the second faulty planetary gear.

8. The gearbox fault detection method according to claim 5, characterized in that: The method further comprises: When there is a main order offset and the ring gear of the second fault planetary gear is not fixed, calculating the difference between the second fault order and the fault order corresponding to the second fault order as the side frequency to obtain the fault characteristic frequency; The fault characteristic frequency is equal to N×f c ±f p When , it is determined that the planetary gear of the second faulty planetary gear has a distributed fault; wherein, f c is the rotation frequency of the planet carrier of the second fault planetary gear, f p is the rotation frequency of the planetary gear of the second faulty planetary gear, and N is a positive integer; The fault characteristic frequency is equal to N×f c ±f s When , it is determined that the sun gear of the second faulty planetary gear has a distributed fault; f s is the rotation frequency of the sun gear of the second faulty planetary gear.

9. A gearbox fault detection device, characterized in that: include: A first acquisition module is used to acquire a target order spectrum of a target gearbox; A first determining module, configured to determine a target standard order spectrum corresponding to the target order spectrum from a plurality of preset standard order spectra; The second determination module is used to determine the fault order based on the target order spectrum and the target standard order spectrum, including: selecting at least one order from the target order spectrum as the target order; for each target order, calculating the difference between its amplitude in the target order spectrum and its amplitude in the target standard order spectrum to obtain an amplitude difference; when the amplitude difference is greater than or equal to a preset amplitude difference threshold, determining the target order corresponding to the amplitude difference as the fault order; The third determination module is used to determine the fault position and fault type of the target gearbox based on each of the fault orders, including: detecting whether there is a fault order that is a multiple frequency; When the fault order of frequency doubling is detected, the fault order of frequency doubling is determined as a first fault order, and the planetary gear corresponding to the first fault order is determined as a first faulty planetary gear; When the ring gear of the first faulty planetary gear set is fixed, counting the number of the first fault orders corresponding to the first faulty planetary gear set; Based on the number of the first fault order, a fault position and a fault type of the first faulty planetary gear are determined.

10. A gearbox fault detection device, characterized in that: include: processor; A memory for storing executable instructions; Wherein, the processor is used to read the executable instructions from the memory, and execute the executable instructions to implement the gearbox fault detection method described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the processor implements the gearbox fault detection method according to any one of claims 1 to 8.

Images