Bearing operating negative clearance detection method, device, system and wind turbine generator

Abstract

The application relates to the field of new energy sources, and provides a bearing operation negative clearance detection method, device, system and wind turbine generator. The method comprises the following steps: acquiring current values of a plurality of first displacement amounts of a first bearing and / or current values of a plurality of second displacement amounts of a second bearing in a running process of a to-be-detected bearing; determining first negative clearances corresponding to the current values of the first displacement amounts based on a preset first corresponding relationship, and / or determining second negative clearances corresponding to the current values of the second displacement amounts based on a preset second corresponding relationship; wherein the first corresponding relationship is used for representing a corresponding relationship between the first displacement amounts and the first negative clearances, and the second corresponding relationship is used for representing a corresponding relationship between the second displacement amounts and the second negative clearances; and determining the running negative clearance of the to-be-detected bearing based on the first negative clearances and / or the second negative clearances. The application can quickly and accurately perform real-time online detection on the running negative clearance of the to-be-detected bearing in the running process of the to-be-detected bearing.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a method, device, system and wind turbine generator set for detecting negative clearance during bearing operation. Background Art

[0002] For single-row tapered double bearings used on large-megawatt wind turbines, their fatigue life is longest when the working clearance is slightly negative. However, as the negative clearance increases or decreases, their fatigue life will show a downward trend. Therefore, it is necessary to conduct real-time detection of the negative clearance of the bearing to improve the fatigue life of the single-row tapered double bearing.

[0003] After the bearing is assembled, the value of negative clearance cannot be directly measured. In the prior art, indirect methods are often used to detect negative clearance during bearing assembly. For example, the axial stiffness formula of the bearing unit is derived using Hertz contact theory to determine the relationship between the axial load on the hub bearing unit and its axial stiffness. Simultaneously, the relationship between the vibration frequency and axial load of the hub bearing unit is indirectly determined based on the relationship between axial stiffness and vibration frequency. By performing a force-deformation analysis on the hub bearing unit, a negative clearance calculation formula is derived, and the relationship between the axial load on the hub bearing unit and its negative clearance is determined. Furthermore, the relationship between the negative clearance and vibration frequency of the hub bearing unit is determined based on the relationship between vibration frequency and axial load. However, this method is highly theoretical and has poor operability, making it difficult to detect the operating negative clearance of the bearing. Furthermore, during operation, it is affected by the vibration of the wind turbine itself and environmental factors, making it difficult to accurately detect negative clearance. Existing negative clearance detection methods also indirectly infer the approximate range of negative clearance by testing the starting torque, resulting in low detection accuracy and inapplicability to the detection of operating negative clearance of bearings.

[0004] Therefore, the existing negative clearance detection method has low detection accuracy and is not applicable to the detection of negative clearance in bearing operation. Summary of the Invention

[0005] The present invention provides a method, device, system and wind turbine generator set for detecting negative clearance of bearings, so as to solve the defect in the prior art that negative clearance of bearings cannot be detected, and realize real-time online detection of negative clearance of bearings.

[0006] The present invention provides a method for detecting negative clearance of a bearing, comprising:

[0007] Acquire current values ​​of several first displacements of the first bearing and / or current values ​​of several second displacements of the second bearing during the operation of the bearing to be tested;

[0008] determine, based on the first preset correspondence relationship, a first negative clearance corresponding to a current value of each of the first displacement amounts, and / or determine, based on a second preset correspondence relationship, a second negative clearance corresponding to a current value of each of the second displacement amounts; the first preset correspondence relationship is used to represent a correspondence relationship between the first displacement amount and the first negative clearance, and the second preset correspondence relationship is used to represent a correspondence relationship between the second displacement amount and the second negative clearance;

[0009] determine, based on the first negative clearance and / or the second negative clearance, an operating negative clearance of the bearing to be detected.

[0010] According to the bearing operating negative clearance detection method provided in the application, the first preset correspondence relationship includes a correspondence relationship between a first preset negative clearance and a simulation value of the first displacement amount; the determination of the first negative clearance corresponding to the current value of each of the first displacement amounts based on the first preset correspondence relationship includes:

[0011] determine, based on the current value of the first displacement amount, a first target value in the simulation value of each of the first displacement amounts;

[0012] determine, based on the first preset negative clearance corresponding to the first target value, the first negative clearance corresponding to the current value of the first displacement amount;

[0013] and / or the second preset correspondence relationship includes a correspondence relationship between a second preset negative clearance and a simulation value of the second displacement amount; the determination of the second negative clearance corresponding to the current value of each of the second displacement amounts based on the second preset correspondence relationship includes:

[0014] determine, based on the current value of the second displacement amount, a second target value in the simulation value of each of the second displacement amounts;

[0015] determine, based on the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement amount.

[0016] According to the bearing operating negative clearance detection method provided in the application, the determination of the first negative clearance corresponding to the current value of the first displacement amount based on the first preset negative clearance corresponding to the first target value includes:

[0017] determine, based on the first target value and the first preset negative clearance corresponding to the first target value, the first negative clearance corresponding to the current value of the first displacement amount by an interpolation method;

[0018] and / or the determination of the second negative clearance corresponding to the current value of the second displacement amount based on the second preset negative clearance corresponding to the second target value includes:

[0019] Based on the second target value and the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined by interpolation.

[0020] According to the bearing negative clearance detection method provided by the present invention, the first corresponding relationship and / or the second corresponding relationship are obtained by the following method:

[0021] Based on the simulation model of the bearing to be tested, respectively obtaining a simulation value of the first displacement under each of the first preset negative clearances, and / or a simulation value of the second displacement under each of the second preset negative clearances;

[0022] The first corresponding relationship is obtained based on the simulation value of each first preset negative clearance and the corresponding first displacement; and / or the second corresponding relationship is obtained based on the simulation value of each second preset negative clearance and the corresponding second displacement.

[0023] According to the bearing operation negative clearance detection method provided by the present invention, the simulation model of the bearing to be tested includes a pressure plate model and a bearing model corresponding to the bearing to be tested; wherein the bearing model includes a first model corresponding to the first bearing and a second model corresponding to the second bearing, and the pressure plate model includes a boss, and the boss is used to apply the first preset negative clearance and / or the second preset negative clearance to the bearing model;

[0024] The step of obtaining, based on the simulation model of the bearing to be tested, respectively the simulation value of the first displacement under each of the first preset negative clearances, and / or the simulation value of the second displacement under each of the second preset negative clearances, comprises:

[0025] adjusting the size of the boss based on the first preset negative clearance;

[0026] Obtaining a displacement simulation result of the first model under the current size of the boss as a simulation value of the first displacement under the first preset negative clearance;

[0027] and / or,

[0028] adjusting the size of the boss based on the second preset negative clearance;

[0029] A displacement simulation result of the second model under the current size of the boss is obtained as a simulation value of the second displacement under the second preset negative clearance.

[0030] According to the method for detecting negative clearance in bearing operation provided by the present invention, the current value of the first displacement is acquired by a first displacement acquisition device, which is a contact-type displacement acquisition device; wherein the contact probe of the first displacement acquisition device is in contact with a preset end face of the first bearing;

[0031] And / or, the current value of the second displacement is acquired by a second displacement acquisition device, and the second displacement acquisition device adopts a contact displacement acquisition device; wherein the contact probe of the second displacement acquisition device contacts the preset end face of the second bearing.

[0032] According to the bearing operating negative clearance detection method provided by the present invention, determining the operating negative clearance of the bearing to be tested based on each of the first negative clearances and / or each of the second negative clearances includes:

[0033] determining a first target negative clearance based on each of the first negative clearances, and determining a second target negative clearance based on each of the second negative clearances;

[0034] Obtain the distance between the first target negative clearance and the second target negative clearance; if the distance is less than or equal to a preset threshold, determine the operating negative clearance of the bearing to be tested based on the first target negative clearance and / or the second target negative clearance; if the distance is greater than the preset threshold, generate an error message.

[0035] The present invention also provides a bearing negative clearance detection device, comprising:

[0036] A data acquisition module, configured to acquire current values ​​of a plurality of first displacements of a first bearing and / or current values ​​of a plurality of second displacements of a second bearing during operation of the bearing to be tested;

[0037] a first data processing module, configured to determine a first negative clearance corresponding to a current value of each first displacement based on a preset first corresponding relationship, and / or to determine a second negative clearance corresponding to a current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to represent a corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to represent a corresponding relationship between the second displacement and the second negative clearance;

[0038] The second data processing module is used to determine the operating negative clearance of the bearing to be tested based on each of the first negative clearances and / or each of the second negative clearances.

[0039] The present invention also provides a bearing operation negative clearance detection system, comprising: a plurality of first displacement detection devices and / or a plurality of second displacement detection devices, and also comprising the bearing operation negative clearance detection device as described above;

[0040] Wherein, the first displacement detection device is used to detect the current value of the first displacement of the first bearing during the operation of the bearing to be tested;

[0041] The second displacement detection device is used to detect the current value of the second displacement of the second bearing during the operation of the bearing to be tested.

[0042] The present invention also provides a wind turbine generator set, comprising: the bearing operation negative clearance detection system as described above.

[0043] The bearing operating negative clearance detection method, device, system and wind turbine generator set provided by the present invention obtain the current values ​​of several first displacement amounts of the first bearing and / or the current values ​​of several second displacement amounts of the second bearing during the operation of the bearing to be tested, and determine the first negative clearance corresponding to the current value of each first displacement amount based on a preset first corresponding relationship, and / or determine the second negative clearance corresponding to the current value of each second displacement amount based on a preset second corresponding relationship, so as to determine the operating negative clearance of the bearing to be tested based on each first negative clearance and / or each second negative clearance, so that the operating negative clearance of the bearing to be tested can be quickly and accurately detected online in real time during the operation of the bearing to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a schematic flow chart of the method for detecting negative clearance in bearing operation provided by the present invention;

[0046] Figure 2 is a flow chart of a method for obtaining a first correspondence relationship and / or a second correspondence relationship provided by the present invention;

[0047] Figure 3 It is a schematic diagram of a flow chart of determining the operating negative clearance of a bearing to be tested based on each first negative clearance and / or each second negative clearance provided by the present invention;

[0048] Figure 4 It is a structural schematic diagram of the bearing running negative clearance detection device provided by the present invention;

[0049] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] The following combination Figures 1 to 3 The present invention describes a method for detecting negative clearance in a bearing operation. The present invention is executed by an electronic device such as a computer or the hardware and / or software therein. Figure 1 As shown, the method for detecting negative clearance in bearing operation of the present invention comprises at least the following steps:

[0052] S101. Acquire current values ​​of several first displacements of a first bearing and / or current values ​​of several second displacements of a second bearing during operation of the bearing to be tested.

[0053] S102. Determine the first negative clearance corresponding to the current value of each first displacement based on a preset first corresponding relationship, and / or determine the second negative clearance corresponding to the current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to characterize the corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to characterize the corresponding relationship between the second displacement and the second negative clearance.

[0054] S103: Determine the operating negative clearance of the bearing to be tested based on each of the first negative clearances and / or each of the second negative clearances.

[0055] In this embodiment, the bearing to be tested is a single-row tapered double bearing, including two single-row tapered bearings, namely a first bearing and a second bearing. The first bearing and the second bearing can be a front bearing and a rear bearing, respectively.

[0056] In the running process of the bearing to be measured, the first displacement amount of the first bearing can be an axial displacement amount of a preset position of the first bearing, and the second displacement amount of the second bearing can be an axial displacement amount of a preset position of the second bearing. The preset position of the first bearing can be an end face of an outer ring of the first bearing, and the preset position of the second bearing can be an end face of an outer ring of the second bearing. The current value of the first displacement amount, i.e., the axial displacement amount of the preset position of the first bearing at the current time, can be collected by the first displacement collection device, and the current value of the second displacement amount, i.e., the axial displacement amount of the preset position of the second bearing at the current time, can be collected by the second displacement collection device. The first displacement collection device and the second displacement collection device can adopt a contact type displacement sensor, such as a contact type linear displacement sensor, to avoid the influence of the shaking of the bearing to be measured in the running process on the accuracy of the current value of the first displacement amount and the current value of the second displacement amount, thereby improving the accuracy of the current value of the first displacement amount and the current value of the second displacement amount.

[0057] One or more first displacement collection devices and one or more second displacement collection devices can be provided to obtain the current value of one or more first displacement amounts and the current value of one or more second displacement amounts.

[0058] The first correspondence relationship is used to represent the corresponding relationship between the first displacement amount and the first negative clearance, and the second correspondence relationship is used to represent the corresponding relationship between the second displacement amount and the second negative clearance. The first correspondence relationship and the second correspondence relationship can be a mathematical model, a mapping table, a curve diagram, or a machine learning model, etc., which can be determined according to actual needs. After obtaining the current value of the first displacement amount and / or the current value of the second displacement amount, the first negative clearance corresponding to each current value of the first displacement amount can be quickly and accurately obtained based on the first correspondence relationship, and / or the second negative clearance corresponding to each current value of the second displacement amount can be quickly and accurately obtained based on the second correspondence relationship.

[0059] After the first negative clearance corresponding to the current value of each first displacement amount and / or the second negative clearance corresponding to the current value of each second displacement amount is obtained, the running negative clearance of the bearing to be measured can be determined based on each first negative clearance and / or each second negative clearance, so that the running negative clearance of the bearing to be measured can be detected in real time and online during the operation of the bearing to be measured. For example, a first target negative clearance can be determined based on each first negative clearance, and the first target negative clearance is taken as the running negative clearance of the bearing to be measured; a second target negative clearance can be determined based on each second negative clearance, and the second target negative clearance is taken as the running negative clearance of the bearing to be measured; the running negative clearance of the bearing to be measured can be determined based on the first target negative clearance and the second target negative clearance, for example, the first target negative clearance and the second target negative clearance can be weighted and summed to obtain the running negative clearance of the bearing to be measured, and the running negative clearance of the bearing to be measured can be determined based on the comparison result of the absolute value of the difference between the first target negative clearance and the second target negative clearance and a preset threshold.

[0060] It can be understood that in the case of determining the running negative clearance of the bearing to be measured based on each first negative clearance, only the current values of the first displacement amounts of the first bearing can be obtained; in the case of determining the running negative clearance of the bearing to be measured based on each second negative clearance, only the current values of the second displacement amounts of the second bearing can be obtained.

[0061] In the embodiment, the current values of the first displacement amounts of the first bearing and / or the current values of the second displacement amounts of the second bearing during the operation of the bearing to be measured are obtained, and the first negative clearance corresponding to each current value of the first displacement amount is determined based on the preset first correspondence relationship, and / or the second negative clearance corresponding to each current value of the second displacement amount is determined based on the preset second correspondence relationship, so that the running negative clearance of the bearing to be measured can be quickly and accurately detected in real time and online during the operation of the bearing to be measured based on each first negative clearance and / or each second negative clearance.

[0062] In an example embodiment, the first correspondence relationship includes a correspondence relationship between a first preset negative clearance and a simulation value of the first displacement amount; and the determination of the first negative clearance corresponding to each current value of the first displacement amount based on the preset first correspondence relationship includes:

[0063] determining a first target value in the simulation values of each first displacement amount based on the current value of the first displacement amount;

[0064] determining the first negative clearance corresponding to the current value of the first displacement amount based on the first preset negative clearance corresponding to the first target value;

[0065] And / or, the second corresponding relationship includes a corresponding relationship between a second preset negative clearance and a simulation value of the second displacement; and determining the second negative clearance corresponding to each current value of the second displacement based on the preset second corresponding relationship includes:

[0066] determining a second target value of each simulated value of the second displacement amount based on a current value of the second displacement amount;

[0067] Based on the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined.

[0068] In this embodiment, the magnitudes of the first and second preset negative clearances can be set based on actual needs. For example, sampling can be performed based on a preset range of the operating negative clearance of the bearing to be tested. That is, within the preset range of the operating negative clearance, sampling is performed at intervals of a preset step size to obtain multiple first preset negative clearances and / or multiple second preset negative clearances. The preset range can be 0 to 1 mm, and the preset step size can be 0.1 mm. It is understood that the first and second preset negative clearances can be the same, different, or partially the same.

[0069] The simulation value of the first displacement corresponding to the first preset negative clearance and / or the simulation value of the second displacement corresponding to the second preset negative clearance can be obtained by simulating a simulation model of the bearing to be tested. The first correspondence and / or the second correspondence can be stored in the form of a mapping table, that is, the first correspondence can be stored in a first mapping table, the first mapping table including each first preset negative clearance and the simulation value of the first displacement corresponding to each first preset negative clearance; the second correspondence can be stored in a second mapping table, the second mapping table including each second preset negative clearance and the simulation value of the second displacement corresponding to each second preset negative clearance; it is understandable that when the first preset negative clearance is the same as the second preset negative clearance, the first correspondence and the second correspondence can be stored in a single mapping table.

[0070] The first target value in the simulation value of the first displacement, that is, the one or two simulation values ​​of the first displacement closest to the current value of the first displacement, if there is a value identical to the current value of the first displacement among the simulation values ​​of the first displacement, then the number of first target values ​​is one, and the first preset negative clearance corresponding to the first target value can be directly used as the first negative clearance; if there is no value identical to the current value of the first displacement among the simulation values ​​of the first displacement, and the current value of the first displacement is within the first range determined by the simulation values ​​of each first displacement, then the number of first target values ​​is two, and the first negative clearance can be obtained by averaging the first preset negative clearances corresponding to the two first target values, or by interpolation. If the current value of the first displacement is outside the first range, then the current value of the first displacement can be treated as an invalid value, thereby enabling the first negative clearance corresponding to each current value of the first displacement to be quickly and accurately determined.

[0071] The second target value in the simulation value of the second displacement, i.e., the one or two simulation values ​​of the second displacement closest to the current value of the second displacement, is one second target value if there is a value identical to the current value of the second displacement among the simulation values ​​of the second displacement, and the second preset negative clearance corresponding to the second target value can be directly used as the second negative clearance. If there is no value identical to the current value of the second displacement among the simulation values ​​of the second displacement, and the current value of the second displacement is within the second range determined by the simulation values ​​of each second displacement, then there are two second target values, and the second negative clearance can be obtained by averaging the second preset negative clearances corresponding to the two second target values, or by interpolation. If the current value of the second displacement is outside the second range, the current value of the second displacement is invalid, thereby enabling the second negative clearance corresponding to each current value of the second displacement to be quickly and accurately determined.

[0072] In an exemplary embodiment, determining the first negative clearance corresponding to the current value of the first displacement based on the first preset negative clearance corresponding to the first target value includes:

[0073] Determining the first negative clearance corresponding to the current value of the first displacement by interpolation based on the first target value and the first preset negative clearance corresponding to the first target value;

[0074] And / or, determining the second negative clearance corresponding to the current value of the second displacement based on the second preset negative clearance corresponding to the second target value includes:

[0075] Based on the second target value and the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined by interpolation.

[0076] In this embodiment, when the number of first target values ​​is two, the first negative clearance corresponding to the current value of the first displacement can be determined by linear interpolation based on the first target value and the first preset negative clearance corresponding to the first target value; when the number of first target values ​​is one, the first preset negative clearance corresponding to the first target value can be directly used as the first negative clearance corresponding to the current value of the first displacement, thereby effectively improving the accuracy of the determination result of the first negative clearance.

[0077] When the number of second target values ​​is two, the second negative clearance corresponding to the current value of the second displacement can be determined by linear interpolation based on the second target value and the second preset negative clearance corresponding to the second target value; when the number of second target values ​​is one, the second preset negative clearance corresponding to the second target value can be directly used as the second negative clearance corresponding to the current value of the second displacement, thereby effectively improving the accuracy of the determination result of the second negative clearance.

[0078] In an exemplary embodiment, as Figure 2 As shown, the first corresponding relationship and / or the second corresponding relationship are obtained by the following method:

[0079] S201. Based on the simulation model of the bearing to be tested, respectively obtain the simulation value of the first displacement under each of the first preset negative clearances, and / or the simulation value of the second displacement under each of the second preset negative clearances.

[0080] S202. Based on the simulation values ​​of each of the first preset negative clearances and the corresponding first displacements, obtain the first corresponding relationship; and / or based on the simulation values ​​of each of the second preset negative clearances and the corresponding second displacements, obtain the second corresponding relationship.

[0081] In this embodiment, the simulation model of the bearing to be tested may include a bearing model corresponding to the bearing to be tested, and may further include a pressure plate model, so that different first preset negative clearances and / or second preset negative clearances are applied to the bearing model through the pressure plate model, and simulation values ​​of the first displacement under each first preset negative clearance and / or simulation values ​​of the second displacement under each second preset negative clearance are obtained. The simulation model of the bearing to be tested may be constructed in a finite element simulation system, and simulation values ​​of the first displacement and / or simulation values ​​of the second displacement are obtained.

[0082] As a preferred embodiment, in the case of determining the running negative clearance of the bearing under test based on the first negative clearance corresponding to the current value of each first displacement amount and the second negative clearance corresponding to the current value of each second displacement amount, the first preset negative clearance and the second preset negative clearance can be the same, so that the simulation values of the first displacement amount and the second displacement amount can be obtained simultaneously according to the applied first preset negative clearance or second preset negative clearance, thereby improving the simulation efficiency.

[0083] After obtaining the simulation values of the first displacement amount corresponding to each first preset negative clearance and / or the simulation values of the second displacement amount corresponding to each second preset negative clearance, each first preset negative clearance and the corresponding simulation value of the first displacement amount can be stored through a first mapping table to obtain a first corresponding relationship; and each second preset negative clearance and the corresponding simulation value of the second displacement amount can also be stored through a second mapping table to obtain a second corresponding relationship, so that the first negative clearance corresponding to the current value of the first displacement amount and / or the second negative clearance corresponding to the current value of the second displacement amount can be obtained through a table lookup manner.

[0084] It can be understood that linear fitting can also be performed based on each first preset negative clearance and the corresponding simulation value of the first displacement amount to obtain a first mathematical model, and the current value of the first displacement amount can be input into the first mathematical model to obtain the corresponding first negative clearance; and / or linear fitting can also be performed based on each second preset negative clearance and the corresponding simulation value of the second displacement amount to obtain a second mathematical model, and the current value of the second displacement amount can be input into the second mathematical model to obtain the corresponding second negative clearance. In addition, a first machine learning model can also be trained based on each first preset negative clearance and the corresponding simulation value of the first displacement amount, and the current value of the first displacement amount can be input into the first machine learning model to obtain the corresponding first negative clearance; and / or a second machine learning model can also be trained based on each second preset negative clearance and the corresponding simulation value of the second displacement amount, and the current value of the second displacement amount can be input into the second machine learning model to obtain the corresponding second negative clearance, so that the first negative clearance and / or the second negative clearance can be quickly and accurately obtained, thereby effectively improving the determination efficiency and accuracy of the running negative clearance of the bearing under test.

[0085] In an exemplary embodiment, the simulation model of the bearing under test comprises a platen model and a bearing model corresponding to the bearing under test; wherein the bearing model comprises a first model corresponding to the first bearing and a second model corresponding to the second bearing, and the platen model comprises a boss for applying the first preset negative clearance and / or the second preset negative clearance to the bearing model.

[0086] The step of obtaining, based on the simulation model of the bearing to be tested, respectively the simulation value of the first displacement under each of the first preset negative clearances, and / or the simulation value of the second displacement under each of the second preset negative clearances, comprises:

[0087] adjusting the size of the boss based on the first preset negative clearance;

[0088] Obtaining a displacement simulation result of the first model under the current size of the boss as a simulation value of the first displacement under the first preset negative clearance;

[0089] and / or,

[0090] adjusting the size of the boss based on the second preset negative clearance;

[0091] A displacement simulation result of the second model under the current size of the boss is obtained as a simulation value of the second displacement under the second preset negative clearance.

[0092] In this embodiment, the simulation model of the bearing to be tested includes a pressure plate model and a bearing model corresponding to the bearing to be tested. The pressure plate model and the bearing model may be finite element models. The pressure plate model is provided with a boss for applying a first preset negative clearance and / or a second preset negative clearance to the bearing model. The bearing model may include a first model corresponding to the first bearing and a second model corresponding to the second bearing. During the simulation process, the pressure plate model and the bearing model may be brought into contact. For example, the pressure plate model and the bearing model may be assembled together using a bolt model and compressed by the preload force of the bolt model to bring the pressure plate model and the bearing model into contact. Simultaneously, the boss may be brought into contact with an end face of the first or second model. For example, the boss may be brought into contact with the end face of the inner ring of the second model (i.e., the model corresponding to the rear bearing). When the pressure plate model and the bearing model are compressed, the boss may cause the inner ring of the second model to displace, thereby applying the first preset negative clearance and / or the second preset negative clearance. The size of the boss in the pressure plate model can be adjusted based on the first preset negative clearance and / or the second preset negative clearance to achieve different negative clearances on the bearing model, wherein the boss size corresponding to each first preset negative clearance and / or second preset negative clearance can be determined based on a third corresponding relationship between the negative clearance and the boss size.

[0093] In the process of applying negative clearance to the bearing model through the boss, the outer ring of the first model and the outer ring of the second model will undergo corresponding displacements through the transmission of force. The finite element simulation system can automatically obtain the simulation value of the first displacement of the outer ring of the first bearing and the simulation value of the second displacement of the outer ring of the second bearing, so that the first corresponding relationship and the second corresponding relationship can be obtained quickly and effectively.

[0094] In an exemplary embodiment, the current value of the first displacement is acquired by a first displacement acquisition device, which is a contact-type displacement acquisition device; wherein a contact probe of the first displacement acquisition device is in contact with a preset end face of the first bearing;

[0095] And / or, the current value of the second displacement is acquired by a second displacement acquisition device, and the second displacement acquisition device adopts a contact displacement acquisition device; wherein the contact probe of the second displacement acquisition device contacts the preset end face of the second bearing.

[0096] In this embodiment, the first displacement acquisition device and / or the second displacement acquisition device utilize contact-type displacement acquisition devices, thereby effectively preventing the impact of shaking during the operation of the bearing under test on the accuracy of the current values ​​of the first and second displacements, thereby improving the accuracy of the current values ​​of the first and second displacements. Specifically, the first displacement acquisition device can be installed at the grease collection hole at the end cap of the first bearing, so that the contact probe of the first displacement acquisition device contacts the small end face of the outer ring of the first bearing. The first displacement acquisition device can then collect the axial displacement of the outer ring of the first bearing in real time and use it as the current value of the first displacement. A second displacement acquisition device can also be installed at the grease collection hole at the end cap of the second bearing, so that the contact probe of the second displacement acquisition device contacts the small end face of the outer ring of the second bearing. The second displacement acquisition device can then collect the axial displacement of the outer ring of the second bearing in real time and use it as the current value of the second displacement. Based on this, the first and second displacement acquisition devices can collect the current values ​​of the first and second displacements in real time during the operation of the bearing under test, thereby achieving real-time detection of the negative clearance of the bearing under test.

[0097] The end caps of the first bearing and the second bearing typically include four grease holes. A first displacement acquisition device can be installed at any one or more of the four grease holes of the first bearing, and a second displacement acquisition device can be installed at any one or more of the four grease holes of the second bearing. In this embodiment, there is no specific limitation on the specific types of the first displacement acquisition device and the second displacement acquisition device. It is sufficient that they are resistant to the influence of grease. For example, they can be contact linear displacement sensors. It is understandable that, according to actual needs, a first through hole can be opened in the first bearing to install the first displacement acquisition device, and / or a second through hole can be opened in the second bearing to install the second displacement acquisition device.

[0098] In an exemplary embodiment, as Figure 3 As shown, the determining of the operating negative clearance of the bearing to be tested based on each of the first negative clearances and / or each of the second negative clearances includes:

[0099] S301 . Determine a first target negative clearance based on each of the first negative clearances, and determine a second target negative clearance based on each of the second negative clearances.

[0100] S302. Obtain the distance between the first target negative clearance and the second target negative clearance; if the distance is less than or equal to a preset threshold, determine the operating negative clearance of the bearing to be tested based on the first target negative clearance and / or the second target negative clearance; if the distance is greater than the preset threshold, generate an error message.

[0101] In this embodiment, the operating negative clearance of the bearing to be tested can be determined based on each first negative clearance and each second negative clearance. The first target negative clearance can be a first detection value of the operating negative clearance of the bearing to be tested determined based on the current value of each first displacement of the first bearing; the second target negative clearance can be a second detection value of the operating negative clearance of the bearing to be tested determined based on the current value of each second displacement of the second bearing.

[0102] Among them, the first target negative clearance can be determined based on each first negative clearance, for example, the mean or median of each first negative clearance can be used as the first target negative clearance; the second target negative clearance can also be determined based on each second negative clearance, for example, the mean or median of each second negative clearance can be used as the second target negative clearance.

[0103] The distance between the first target negative clearance and the second target negative clearance is the absolute value of the difference between the first target negative clearance and the second target negative clearance. The size of the preset threshold can be set according to the accuracy requirements. If the distance between the first target negative clearance and the second target negative clearance is greater than the preset threshold, it indicates that the data collected by the first displacement sensor or the second displacement sensor is invalid, and an error message can be generated and displayed on the display device to prompt the operator to troubleshoot. If the distance between the first target negative clearance and the second target negative clearance is less than or equal to the preset threshold, the operating negative clearance of the bearing to be tested is determined based on the first target negative clearance and / or the second target negative clearance. For example, the first target negative clearance can be used as the operating negative clearance of the bearing to be tested, and the second target negative clearance can also be used as the operating negative clearance of the bearing to be tested. The first target negative clearance and the second target negative clearance can also be weighted and summed to obtain the operating negative clearance of the bearing to be tested, thereby effectively ensuring the validity of the detection result of the operating negative clearance of the bearing to be tested.

[0104] The following describes the bearing negative clearance detection device provided by the present invention. The bearing negative clearance detection device described below and the bearing negative clearance detection method described above can be used for reference. Figure 4 As shown, the bearing negative clearance detection device of the present invention at least includes:

[0105] The data acquisition module 401 is used to acquire current values ​​of a plurality of first displacements of a first bearing and / or current values ​​of a plurality of second displacements of a second bearing during operation of the bearing to be tested;

[0106] a first data processing module 402 configured to determine a first negative clearance corresponding to a current value of each first displacement based on a preset first correspondence relationship, and / or to determine a second negative clearance corresponding to a current value of each second displacement based on a preset second correspondence relationship; wherein the first correspondence relationship is used to represent a correspondence between the first displacement and the first negative clearance, and the second correspondence relationship is used to represent a correspondence between the second displacement and the second negative clearance;

[0107] The second data processing module 403 is configured to determine the operating negative clearance of the bearing to be tested based on each of the first negative clearances and / or each of the second negative clearances.

[0108] In an exemplary embodiment, the first corresponding relationship includes a corresponding relationship between a first preset negative clearance and a simulation value of the first displacement; the first data processing module 402 is specifically configured to:

[0109] determining a first target value among the simulated values ​​of each of the first displacement amounts based on a current value of the first displacement amount;

[0110] determining, based on the first preset negative clearance corresponding to the first target value, the first negative clearance corresponding to the current value of the first displacement;

[0111] And / or, the second corresponding relationship includes a corresponding relationship between a second preset negative clearance and a simulation value of the second displacement; the first data processing module 402 is specifically configured to:

[0112] determining a second target value of each simulated value of the second displacement amount based on a current value of the second displacement amount;

[0113] Based on the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined.

[0114] In an exemplary embodiment, the first data processing module 402 is specifically configured to:

[0115] Determining the first negative clearance corresponding to the current value of the first displacement by interpolation based on the first target value and the first preset negative clearance corresponding to the first target value;

[0116] And / or, based on the second target value and the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined by interpolation.

[0117] In an exemplary embodiment, a third data processing module is further included, wherein the third data processing module is configured to:

[0118] Based on the simulation model of the bearing to be tested, respectively obtaining a simulation value of the first displacement under each of the first preset negative clearances, and / or a simulation value of the second displacement under each of the second preset negative clearances;

[0119] The first corresponding relationship is obtained based on the simulation value of each first preset negative clearance and the corresponding first displacement; and / or the second corresponding relationship is obtained based on the simulation value of each second preset negative clearance and the corresponding second displacement.

[0120] In an exemplary embodiment, the simulation model of the bearing to be tested includes a pressure plate model and a bearing model corresponding to the bearing to be tested; wherein the bearing model includes a first model corresponding to the first bearing and a second model corresponding to the second bearing, and the pressure plate model includes a boss, and the boss is used to apply the first preset negative clearance and / or the second preset negative clearance to the bearing model;

[0121] The third data processing module is specifically configured to:

[0122] adjusting the size of the boss based on the first preset negative clearance;

[0123] Obtaining a displacement simulation result of the first model under the current size of the boss as a simulation value of the first displacement under the first preset negative clearance;

[0124] and / or,

[0125] adjusting the size of the boss based on the second preset negative clearance;

[0126] A displacement simulation result of the second model under the current size of the boss is obtained as a simulation value of the second displacement under the second preset negative clearance.

[0127] In an exemplary embodiment, the current value of the first displacement is acquired by a first displacement acquisition device, which is a contact-type displacement acquisition device; wherein a contact probe of the first displacement acquisition device is in contact with a preset end face of the first bearing;

[0128] And / or, the current value of the second displacement is acquired by a second displacement acquisition device, and the second displacement acquisition device adopts a contact displacement acquisition device; wherein the contact probe of the second displacement acquisition device contacts the preset end face of the second bearing.

[0129] In an exemplary embodiment, the second data processing module 403 is specifically configured to:

[0130] determining a first target negative clearance based on each of the first negative clearances, and determining a second target negative clearance based on each of the second negative clearances;

[0131] Obtain the distance between the first target negative clearance and the second target negative clearance; if the distance is less than or equal to a preset threshold, determine the operating negative clearance of the bearing to be tested based on the first target negative clearance and / or the second target negative clearance; if the distance is greater than the preset threshold, generate an error message.

[0132] This embodiment further provides a bearing operation negative clearance detection system, comprising: a plurality of first displacement detection devices and / or a plurality of second displacement detection devices, and also comprising the bearing operation negative clearance detection device as described in any of the above embodiments;

[0133] Wherein, the first displacement detection device is used to detect the current value of the first displacement of the first bearing during the operation of the bearing to be tested;

[0134] The second displacement detection device is used to detect the current value of the second displacement of the second bearing during the operation of the bearing to be tested.

[0135] This embodiment also provides a wind turbine generator set, including the bearing negative clearance detection system as described in the above embodiment.

[0136] Figure 5 An example of a physical structure diagram of an electronic device is shown below. Figure 5 As shown, the electronic device may include: a processor 501, a communications interface 502, a memory 503, and a communications bus 504, wherein the processor 501, the communications interface 502, and the memory 503 communicate with each other via the communications bus 504. The processor 501 may call logic instructions in the memory 503 to execute a method for detecting negative clearance during bearing operation, the method comprising: obtaining current values ​​of several first displacements of a first bearing and / or current values ​​of several second displacements of a second bearing during the operation of the bearing to be tested;

[0137] Determining a first negative clearance corresponding to a current value of each first displacement based on a preset first corresponding relationship, and / or determining a second negative clearance corresponding to a current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to represent a corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to represent a corresponding relationship between the second displacement and the second negative clearance;

[0138] Based on each of the first negative clearances and / or each of the second negative clearances, the operational negative clearance of the bearing to be tested is determined.

[0139] In addition, the logic instructions in the above-mentioned memory 503 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0140] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, and when the program instructions are executed by a computer, the computer is capable of executing the bearing operation negative clearance detection method provided by the above methods, the method comprising: obtaining current values ​​of several first displacements of a first bearing and / or current values ​​of several second displacements of a second bearing during the operation of the bearing to be tested;

[0141] Determining a first negative clearance corresponding to a current value of each first displacement based on a preset first corresponding relationship, and / or determining a second negative clearance corresponding to a current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to represent a corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to represent a corresponding relationship between the second displacement and the second negative clearance;

[0142] Based on each of the first negative clearances and / or each of the second negative clearances, the operational negative clearance of the bearing to be tested is determined.

[0143] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program is implemented to perform the above-mentioned bearing operation negative clearance detection method, the method comprising: obtaining current values ​​of several first displacements of a first bearing and / or several second displacements of a second bearing during the operation of the bearing to be tested;

[0144] Determining a first negative clearance corresponding to a current value of each first displacement based on a preset first corresponding relationship, and / or determining a second negative clearance corresponding to a current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to represent a corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to represent a corresponding relationship between the second displacement and the second negative clearance;

[0145] Based on each of the first negative clearances and / or each of the second negative clearances, the operational negative clearance of the bearing to be tested is determined.

[0146] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0147] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for detecting negative clearance of a bearing, characterized in that: include: Acquire several current values ​​of first displacements of a first bearing and several current values ​​of second displacements of a second bearing during the operation of the bearing to be tested; wherein the bearing to be tested is a single-row tapered double bearing, and the first bearing and the second bearing are two single-row tapered bearings of the single-row tapered double bearing; Determine a first negative clearance corresponding to a current value of each first displacement based on a preset first corresponding relationship, and determine a second negative clearance corresponding to a current value of each second displacement based on a preset second corresponding relationship; wherein the first corresponding relationship is used to represent the corresponding relationship between the first displacement and the first negative clearance, and the second corresponding relationship is used to represent the corresponding relationship between the second displacement and the second negative clearance; determining a first target negative clearance based on each of the first negative clearances, and determining a second target negative clearance based on each of the second negative clearances; Obtaining a distance between the first target negative clearance and the second target negative clearance; if the distance is less than or equal to a preset threshold, determining the operating negative clearance of the bearing to be tested based on the first target negative clearance and the second target negative clearance; if the distance is greater than the preset threshold, generating an error message; The first corresponding relationship and the second corresponding relationship are obtained by the following method: Based on the simulation model of the bearing to be tested, respectively obtaining a simulation value of the first displacement under each first preset negative clearance and a simulation value of the second displacement under each second preset negative clearance; Based on each of the first preset negative clearances and the corresponding simulation value of the first displacement, the first corresponding relationship is obtained; based on each of the second preset negative clearances and the corresponding simulation value of the second displacement, the second corresponding relationship is obtained; The simulation model of the bearing to be tested includes a pressure plate model and a bearing model corresponding to the bearing to be tested; wherein, the bearing model includes a first model corresponding to the first bearing and a second model corresponding to the second bearing, and the pressure plate model includes a boss, which is used to apply the first preset negative clearance and the second preset negative clearance to the bearing model.

2. The method for detecting negative clearance of a bearing according to claim 1, characterized in that: The first corresponding relationship includes a corresponding relationship between the first preset negative clearance and the simulation value of the first displacement; The determining, based on a preset first corresponding relationship, the first negative clearance corresponding to the current value of each first displacement includes: determining a first target value among the simulated values ​​of each of the first displacement amounts based on a current value of the first displacement amount; determining, based on the first preset negative clearance corresponding to the first target value, the first negative clearance corresponding to the current value of the first displacement; The second corresponding relationship includes a corresponding relationship between the second preset negative clearance and the simulated value of the second displacement; and determining the second negative clearance corresponding to each current value of the second displacement based on the preset second corresponding relationship includes: determining a second target value of each simulated value of the second displacement amount based on a current value of the second displacement amount; Based on the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined.

3. The method for detecting negative clearance of a bearing according to claim 2, characterized in that: The determining, based on the first preset negative clearance corresponding to the first target value, the first negative clearance corresponding to the current value of the first displacement, includes: Determining the first negative clearance corresponding to the current value of the first displacement by interpolation based on the first target value and the first preset negative clearance corresponding to the first target value; The determining, based on the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement, comprises: Based on the second target value and the second preset negative clearance corresponding to the second target value, the second negative clearance corresponding to the current value of the second displacement is determined by interpolation.

4. The method for detecting negative clearance in bearing operation according to claim 1, characterized in that: The step of respectively obtaining the simulation value of the first displacement under each of the first preset negative clearances and the simulation value of the second displacement under each of the second preset negative clearances based on the simulation model of the bearing to be tested comprises: adjusting the size of the boss based on the first preset negative clearance; Obtaining a displacement simulation result of the first model under the current size of the boss as a simulation value of the first displacement under the first preset negative clearance; adjusting the size of the boss based on the second preset negative clearance; A displacement simulation result of the second model under the current size of the boss is obtained as a simulation value of the second displacement under the second preset negative clearance.

5. The method for detecting negative clearance in bearing operation according to any one of claims 1 to 4, characterized in that: The current value of the first displacement is acquired by a first displacement acquisition device, wherein the first displacement acquisition device is a contact-type displacement acquisition device; wherein a contact probe of the first displacement acquisition device is in contact with a preset end face of the first bearing; The current value of the second displacement is acquired by a second displacement acquisition device, which is a contact-type displacement acquisition device; wherein a contact probe of the second displacement acquisition device contacts a preset end face of the second bearing.

6. A bearing negative clearance detection device, characterized in that: Suitable for carrying out the method for detecting negative clearance in bearing operation according to any one of claims 1 to 5, the negative clearance detection device for bearing operation comprises: A data acquisition module, configured to acquire current values ​​of a plurality of first displacements of a first bearing and a plurality of second displacements of a second bearing during operation of the bearing to be tested; a first data processing module, configured to determine a first negative clearance corresponding to a current value of each first displacement based on a preset first correspondence relationship, and to determine a second negative clearance corresponding to a current value of each second displacement based on a preset second correspondence relationship; wherein the first correspondence relationship is used to represent a correspondence between the first displacement and the first negative clearance, and the second correspondence relationship is used to represent a correspondence between the second displacement and the second negative clearance; The second data processing module is used to determine the operating negative clearance of the bearing to be tested based on each of the first negative clearances and each of the second negative clearances.

7. A bearing negative clearance detection system, characterized in that: include: a plurality of first displacement detection devices and a plurality of second displacement detection devices, further comprising the bearing operation negative clearance detection device as claimed in claim 6; Wherein, the first displacement detection device is used to detect the current value of the first displacement of the first bearing during the operation of the bearing to be tested; The second displacement detection device is used to detect the current value of the second displacement of the second bearing during the operation of the bearing to be tested.

8. A wind turbine generator system, characterized in that: include: The bearing negative clearance detection system as claimed in claim 7.

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