Prediction method, device and equipment for uniform load of multi-stage series thrust roller bearing pack

Abstract

The invention discloses a method, device and equipment for predicting the uniform load of a multi-stage series thrust roller bearing pack, and the method comprises the steps: obtaining the structure parameters of each bearing part in the multi-stage series thrust roller bearing pack, and calculating the initial rigidity of each bearing part based on the structure parameters of each bearing part; and solving the target equation set based on the initial rigidity of each bearing part to obtain the deformation quantity of each bearing part, and determining the predicted axial load of each stage of series thrust roller bearing based on the initial rigidity and the deformation quantity of each bearing part. According to the method, the component rigidity of each bearing part is determined by utilizing the structural parameters of each bearing part, and the predicted axial load of each bearing part is predicted based on the component rigidity, so that the structural parameters of the multi-stage series thrust roller bearing pack can be more comprehensively adjusted; therefore, all stages of series thrust roller bearings in the multi-stage series thrust roller bearing pack are uniformly loaded, the condition that a single bearing is overloaded is avoided, and the overall service life of the multi-stage series thrust roller bearing pack is prolonged.

Description

Technical Field

[0001] The present application relates to the field of mechanical engineering technology, and in particular to a method, device and equipment for predicting the load distribution of a multi-stage tandem thrust roller bearing group. Background Art

[0002] As petrochemical equipment's load-bearing requirements for rotating equipment continue to increase, a single thrust bearing is unable to meet the increasing load-bearing requirements, so it is necessary to connect several thrust bearings in series to work together. However, since the thrust bearing's inner and outer spacers, thrust bearings and other bearing parts are not ideal rigid bodies, the load transfer branch structures of each series bearing will be relatively deformed after being stressed, and the axial forces along the series bearings are not equal at the far and near ends, which will cause serious uneven loads transferred to each bearing, thereby affecting the service life of the multi-stage series thrust roller bearing group.

[0003] Therefore the prior art still needs to be improved and enhanced. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a method, device and equipment for predicting the load distribution of a multi-stage tandem thrust roller bearing group in view of the deficiencies in the prior art.

[0005] In order to solve the above technical problems, the first aspect of the present application provides a method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein the multi-stage tandem thrust roller bearing group includes a plurality of tandem thrust cylindrical roller bearings, two adjacent thrust cylindrical roller bearings are subjected to force on the inner sleeve and the cylindrical roller at the same time through a butterfly spring, and the axial force is transmitted to the next stage of thrust cylindrical roller bearing through an inner spacer sleeve; the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group specifically includes:

[0006] Acquire the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing part based on the structural parameters of each bearing part;

[0007] Based on the initial stiffness of each bearing part, solving a pre-constructed target equation group to obtain the deformation of each bearing part, wherein the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity;

[0008] Based on the initial stiffness and deformation of each bearing component, the predicted axial load of each level of tandem thrust roller bearing is determined.

[0009] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein the method for determining the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing component specifically includes:

[0010] Calculate the predicted axial load of each bearing component based on the initial stiffness of each bearing component and the predicted deformation of each bearing component;

[0011] Based on the predicted axial load of each bearing component, the predicted axial load of each level of tandem thrust roller bearing is determined.

[0012] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein after solving the pre-constructed target equation group based on the initial stiffness of each bearing component to obtain the deformation of each bearing component, the method further comprises:

[0013] Calculating the calculated stiffness of each roller based on the predicted deformation of each roller;

[0014] Check whether the stiffness relationship between the initial stiffness and the calculated stiffness of each roller meets the preset requirements;

[0015] When the stiffness relationship of at least one roller does not meet the preset requirements, the calculated stiffness of each roller is used as the initial stiffness of each roller, and the steps of solving the pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part are re-executed until the result conditions for re-execution are met.

[0016] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein the process of constructing the target equation group is as follows:

[0017] The multivariate linear equation is constructed based on the fact that the total deformation of the two branches in any mesh is the same, the forces on the left and right of the node are the same, and the forces on each branch are equal;

[0018] The multivariate linear equation system formed by all constructed multivariate linear equations is taken as the target equation system.

[0019] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein after determining the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing part, the method further comprises:

[0020] Adjusting structural parameters of several bearing parts in the multi-stage tandem thrust roller bearing group to obtain an adjusted multi-stage tandem thrust roller bearing group;

[0021] Re-execute the step of obtaining the structural parameters of each bearing part in the adjusted multi-stage tandem thrust roller bearing group to obtain the predicted axial load of each stage of the tandem thrust roller bearing in the adjusted multi-stage tandem thrust roller bearing group;

[0022] Comparing the predicted axial loads of each stage of the tandem thrust roller bearings in the multi-stage tandem thrust roller bearing group with the predicted axial loads of each stage of the tandem thrust roller bearings in the adjusted multi-stage tandem thrust roller bearing group;

[0023] The structural parameters of the multi-stage tandem thrust roller bearing group are selected based on the comparison results.

[0024] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group is described, wherein the system axial force borne by the multi-stage tandem thrust roller bearing group and the adjusted multi-stage tandem thrust roller bearing group in the process of obtaining the predicted axial load is the same.

[0025] The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, wherein the calculation of the initial stiffness of each bearing component based on the structural parameters of each bearing component specifically includes:

[0026] Applying system axial force to the multi-stage tandem thrust roller bearing group;

[0027] For each bearing part except the roller, the structural parameters of each bearing part are input into the stiffness calculation component corresponding to each bearing part, and the initial stiffness of each bearing part is output through the stiffness calculation component corresponding to each bearing part;

[0028] For the roller, the preset stiffness corresponding to the axial force of the system is read, and the preset stiffness is used as the initial stiffness of the roller.

[0029] The second aspect of the present application provides a prediction device for load balancing of a multi-stage series thrust roller bearing group, wherein the multi-stage series thrust roller bearing group includes a plurality of series-connected thrust cylindrical roller bearings, two adjacent thrust cylindrical roller bearings simultaneously receive force on the inner sleeve and the cylindrical roller through a butterfly spring, and transmit the axial force to the next-stage thrust cylindrical roller bearing through an inner spacer sleeve; the prediction device for load balancing of a multi-stage series thrust roller bearing group specifically includes:

[0030] An acquisition module, used to acquire the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing part based on the structural parameters of each bearing part;

[0031] A solving module, for solving a pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part, wherein the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity;

[0032] A determination module is used to determine the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing component.

[0033] A third aspect of the present application provides a computer-readable storage medium storing one or more programs, which can be executed by one or more processors to implement the steps in the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group as described above.

[0034] A fourth aspect of the present application provides a terminal device, comprising: a processor and a memory;

[0035] The memory stores a computer-readable program executable by the processor;

[0036] When the processor executes the computer-readable program, the processor implements the steps in any of the above-mentioned methods for predicting the load distribution of a multi-stage tandem thrust roller bearing group.

[0037] Beneficial effects: Compared with the prior art, the present application provides a method, device and equipment for predicting the uniform load of a multi-stage tandem thrust roller bearing group, the method comprising obtaining the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculating the initial stiffness of each bearing part based on the structural parameters of each bearing part; based on the initial stiffness of each bearing part, solving the pre-constructed target equation group to obtain the deformation of each bearing part, and determining the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing part. The present application uses the structural parameters of each bearing part to determine the component stiffness of each bearing part, and then predicts the predicted axial load of each bearing part based on the component stiffness, so that the structural parameters of the multi-stage tandem thrust roller bearing group can be adjusted more comprehensively, so that the tandem thrust roller bearings of each stage in the multi-stage tandem thrust roller bearing group are evenly loaded, avoiding excessive load on a single bearing, and improving the overall life of the multi-stage tandem thrust roller bearing group.

[0038] The service life of the multi-stage tandem thrust roller bearing group can be further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A flow chart of a method for predicting load distribution of a multi-stage tandem thrust roller bearing group provided in an embodiment of the present application.

[0041] Figure 2 A schematic diagram of a mechanical model.

[0042] Figure 3A principle block diagram of a device for predicting load distribution of a multi-stage tandem thrust roller bearing group provided in an embodiment of the present application.

[0043] Figure 4 A functional block diagram of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The embodiments of the present application provide a method, device and equipment for predicting the load distribution of a multi-stage tandem thrust roller bearing group. In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0045] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0046] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0047] It should be understood that the sequence numbers and sizes of the steps in this embodiment do not mean the order of execution. The execution order of each process is determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0048] After research, it was found that as petrochemical equipment continues to increase its load-bearing requirements for rotating equipment, a single thrust bearing is difficult to meet the increasing load-bearing requirements, so it is necessary to connect several thrust bearings in series to work together. However, since the inner and outer spacers, thrust bearings and other bearing parts of the thrust bearing are not ideal rigid bodies, the load transfer branch structures of each series bearing will produce relative deformation after being stressed, and the axial forces along the series bearing are not equal at the far and near ends, which will cause serious unevenness in the loads transferred to each bearing, thereby affecting the service life of the multi-stage series thrust roller bearing group.

[0049] In order to solve the above problems, in an embodiment of the present application, the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group are obtained, and the initial stiffness of each bearing part is calculated based on the structural parameters of each bearing part; based on the initial stiffness of each bearing part, the pre-constructed target equation group is solved to obtain the deformation of each bearing part. The present application uses the structural parameters of each bearing part to determine the component stiffness of each bearing part, and then predicts the predicted axial load of each bearing part based on the component stiffness, so that the structural parameters of the multi-stage tandem thrust roller bearing group can be adjusted more comprehensively, so that the tandem thrust roller bearings of each stage in the multi-stage tandem thrust roller bearing group are evenly loaded, avoiding excessive load on a single bearing, and improving the overall life of the multi-stage tandem thrust roller bearing group.

[0050] The application content is further explained below through the description of embodiments in conjunction with the accompanying drawings.

[0051] This embodiment provides a method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, and the method is used to predict the axial load of each stage of the tandem thrust roller bearing in the multi-stage tandem thrust roller bearing group. The multi-stage tandem thrust roller bearing group includes a plurality of thrust cylindrical roller bearings, and the plurality of thrust cylindrical roller bearings are sequentially connected in series to form a multi-stage tandem thrust roller bearing group, and two adjacent thrust cylindrical roller bearings are subjected to force on the inner sleeve and the cylindrical roller at the same time through a butterfly spring, and the axial force is transmitted to the next stage of the thrust cylindrical roller bearing through an inner spacer. In other words, through a slight deformation of the butterfly spring, the inner sleeve of the previous stage of the thrust cylindrical roller bearing and the cylindrical roller of the next stage of the thrust cylindrical roller bearing are subjected to force at the same time, and the axial force is transmitted to the next stage of the thrust cylindrical roller bearing through the inner spacer.

[0052] like Figure 1 As shown, the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group provided in this embodiment specifically includes:

[0053] S10, obtaining structural parameters of each bearing component in the multi-stage tandem thrust roller bearing group, and calculating the initial stiffness of each bearing component based on the structural parameters of each bearing component.

[0054] Specifically, the thrust roller bearing includes an inner sleeve, an outer sleeve, an inner spacer, an outer spacer, a shaft ring, a seat ring and a rolling element, and each bearing part in the multi-stage tandem thrust roller bearing group includes the inner sleeve, outer sleeve, inner spacer, outer spacer, shaft ring, seat ring and rolling element included in each thrust roller bearing. In addition, in practical applications, since some bearing parts are not subjected to force when bearing, these bearing parts can be ignored when predicting the axial load. For this reason, when obtaining the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, the bearing parts that need to participate in the axial load prediction can be determined first, and the structural parameters of the bearing parts participating in the axial load prediction can be read. For example, the retaining frame is not subjected to force when bearing, so the bearing parts participating in the axial load prediction can not include the retaining frame. At the same time, some bearing parts can also be simplified to improve the prediction efficiency of the axial load prediction, for example, the inner spacer and the outer spacer can be simplified.

[0055] In one implementation, the calculating the initial stiffness of each bearing component based on the structural parameters of each bearing component specifically includes:

[0056] Applying system axial force to the multi-stage tandem thrust roller bearing group;

[0057] For each bearing part except the roller, the structural parameters of each bearing part are input into the stiffness calculation component corresponding to each bearing part, and the initial stiffness of each bearing part is output through the stiffness calculation component corresponding to each bearing part;

[0058] For the roller, the preset stiffness corresponding to the axial force of the system is read, and the preset stiffness is used as the initial stiffness of the roller.

[0059] Specifically, applying a system axial force to the multi-stage tandem thrust roller bearing group is used to put the bearing in a load-bearing state, that is, the predicted axial load of each stage of the tandem thrust roller bearing is the axial load carried by each stage of the tandem thrust roller bearing group predicted when the system axial force is applied. The structural parameters of each bearing part can provide the required dimensional parameters for calculating the component stiffness of each bearing part. For example, for a roller, the structural parameter can be the roller length.

[0060] Furthermore, since the component stiffness of other bearing parts except rollers is only related to their own structural parameters, that is, the component stiffness of other bearing parts except rollers can be directly calculated based on the structural parameters of the bearing parts, for this reason, for other bearing parts except rollers, the structural parameters of the bearing parts can be directly input into the stiffness calculation components of each bearing part, and the initial stiffness of each bearing part is output through the corresponding stiffness calculation components, wherein the stiffness calculation components are configured with program codes for calculating component stiffness, such as mat l ab program codes, etc. For rollers, since the roller stiffness of the roller is related to the contact deformation amount during the bearing load process in addition to the roller parameters, and the roller contact deformation amount during the bearing load process is a variable, the roller stiffness cannot be directly calculated. To this end, when calculating the initial stiffness of each bearing component based on the structural parameters, the initial stiffness can be determined according to the system axial force borne by the bearing group. For example, a correspondence table between the system axial force and the roller contact stiffness can be pre-set, and then the preset stiffness corresponding to the system axial force borne by the bearing group can be found through the correspondence table, and the preset stiffness can be used as the initial stiffness. Of course, in practical applications, a default stiffness can also be directly pre-set, and then the default stiffness can be directly used as the initial stiffness of the roller, etc.

[0061] S20. Based on the initial stiffness of each bearing component, solve the pre-constructed target equation group to obtain the deformation of each bearing component.

[0062] Specifically, the target equation group is pre-constructed and used to determine the deformation of each bearing part, that is, the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity. The target equation group can be solved using the Newton-Raphson method. The specific solution process is not described in detail here.

[0063] Each bearing part of the multi-stage tandem thrust roller bearing group can be regarded as a homogeneous spring. According to the principle of elastic plate, the multi-stage tandem thrust roller bearing group can be converted into an equivalent mechanical model. Then, based on the equivalent mechanical model, the target equation can be obtained by using the mesh analysis method and the node analysis method. Among them, the target equation group includes a plurality of multivariate linear equation groups formed according to the force and deformation relationship between each bearing part. That is to say, the target equation group includes several linear equations, each of which is constructed based on the force relationship and / or deformation relationship between the bearing parts. Based on this, the construction process of the target equation group is:

[0064] The multivariate linear equation is constructed based on the fact that the total deformation of the two branches in any mesh is the same, the forces on the left and right of the node are the same, and the forces on each branch are equal;

[0065] The multivariate linear equation system formed by all constructed multivariate linear equations is taken as the target equation system.

[0066] Specifically, when the multi-stage tandem thrust roller bearing group is subjected to the axial force of the system, the disc springs of each stage in the multi-stage tandem thrust roller bearing group will produce axial deformation, and accordingly, contact elastic deformation will occur between each group of rolling elements and the raceway surface; the inner and outer sleeves of each stage will produce slight axial deformation. Therefore, according to the principle of elastic mechanical balance, the multi-stage tandem thrust roller bearing group can be converted into a mechanical model. For example, the TBT8 / 120×3 tandem thrust cylindrical roller bearing can be converted into the following Figure 2 The mechanical model shown.

[0067] Then, according to the mesh analysis method and the node analysis method, it can be known that in this mechanical model, the forces and deformations between the bearing parts need to satisfy the relationship that the total deformation of the two branches in any mesh is the same, the forces on the left and right of the node are the same, and the forces on each branch are equal. To this end, a multivariate linear equation can be constructed based on the fact that the total deformation of the two branches in any mesh is the same, the forces on the left and right of the node are the same, and the forces on each branch are equal. Then, the multivariate linear equation group formed by all the constructed multivariate linear equations is used as the target equation group. For example, Figure 2 Taking the mechanical model of as an example, a linear equation is constructed based on the same forces on the left and right sides of node 1: WS1*x(9)=G1*x(1)+WR1*x(25) and GS2*x(18)=GR1*x(31)+G2*x(2); a linear equation is constructed based on the same total deformation of the two branches of the mesh: x(1)+x(17)+x(31)=x(25)+x(10)+x(2), x(2)+x(18)+x(32)=x(26)+x(11)+x(3), and a linear equation WH*x(37)=WSO*x(38) and GS1*x(17)=GR1*x(31) is constructed based on the equality of forces on a single branch, where WS1, G1, WR1, GS2, GR1, G2, WH, WSO and GS1 all represent bearing parts, and x(*) represents the deformation of the bearing parts. In addition, WS, GR2, GS3, GR3, GS4, GS, GHO, WS2, WR2, WS3, G3, WR3, WS4, G4, WS01, G01, GS01, GR01, GS02, GR02, GS03, GR03, GS04, WR01, WS02, G02, WR02, WS023, G03, WR03, WS04 and G04 in the figure all represent bearing parts.

[0068] Furthermore, since the roller stiffness is related to the roller deformation, and the roller adopts a preset stiffness when determining the initial stiffness, after obtaining the roller deformation, the calculated stiffness of the roller can be calculated based on the roller deformation, and then the initial stiffness can be verified based on the calculated stiffness. To this end, after solving the pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part, the method further includes:

[0069] Calculating the calculated stiffness of each roller based on the predicted deformation of each roller;

[0070] Check whether the stiffness relationship between the initial stiffness and the calculated stiffness of each roller meets the preset requirements;

[0071] When the stiffness relationships of the rollers all meet the preset requirements, the predicted axial loads of the tandem thrust roller bearings at each level are determined based on the initial stiffness and deformation of each bearing component;

[0072] When the stiffness relationship of at least one roller does not meet the preset requirements, the calculated stiffness of each roller is used as the initial stiffness of each roller, and the initial stiffness based on each bearing part is re-executed to solve the pre-constructed target equation group to obtain the deformation of each bearing part until the stiffness relationship of each roller meets the preset requirements.

[0073] Specifically, the preset requirement is preset, and the preset requirement can preset a difference threshold. The stiffness relationship between the initial stiffness and the calculated stiffness is the absolute value of the difference between the initial stiffness and the calculated stiffness. The preset requirement is met when the absolute value of the difference is less than the preset difference threshold. That is to say, after the calculated stiffness of the roller is calculated, the absolute value of the difference between the initial stiffness and the calculated stiffness can be calculated, and then the calculated absolute value of the difference can be compared with the preset difference threshold. If the absolute value of the difference is less than the preset difference threshold, it means that the stiffness relationship of the roller meets the preset requirement. On the contrary, if the absolute value of the difference is greater than or equal to the preset difference threshold, it means that the stiffness relationship of the roller does not meet the preset requirement.

[0074] For example: Assume that the preset difference threshold is 0.00001, the initial stiffness is set to K0, K0 = C, C is a constant; the axial load is Q = K n *δ n 1.11 , K n =3.73*10 4 *L 0.89 , for Q against δ n Taking the derivative, we get K = Q' = 3.73*10 4 *L 0.89 *1.11*δ n 0.11 , where Q represents the axial load, δ nrepresents the deformation of the roller, K represents the calculated stiffness, K n Represents the default roller stiffness, and L represents the roller length. Then, after obtaining the predicted deformation variable, the calculated stiffness can be calculated based on the calculation formula of the calculated stiffness, and then the absolute value of the difference between the calculated initial stiffness and the calculated stiffness, the absolute value of the difference = |K0-K|, and then the absolute value of the difference is compared with 0.00001. If the absolute value of the difference is less than 0.00001, the re-execution is terminated. If the absolute value of the difference is greater than or less than 0.00001, the calculated stiffness is assigned as the initial stiffness, and the steps of solving the pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation variable of each bearing part are re-executed until the stiffness relationship of each roller meets the preset requirements.

[0075] In addition, in practical applications, a program component can be preset for the determination process of the calculated stiffness. When the predicted deformation is obtained, the program component is used to determine whether it is necessary to re-execute the steps of solving the pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part, or to execute the steps of determining the predicted axial load of each level of tandem thrust roller bearings based on the initial stiffness and deformation of each bearing part. For example, the program component can be a matl ab program, and the core program of the matl ab program is K=3.73*10 4 *L 0.89 *1.11*δ n ^0.11; erri=K0-K; tor=abs(erri); if tor<0.00001; break else K0=K.

[0076] S30. Determine the predicted axial load of each level of tandem thrust roller bearings based on the initial stiffness and deformation of each bearing component.

[0077] Specifically, after obtaining the initial stiffness and deformation of each bearing part, the axial load of each bearing part can be calculated based on the initial stiffness and deformation, and then the predicted axial load of each stage of tandem thrust roller bearings can be determined based on the axial load of each bearing part.

[0078] Based on this, the predicted loads of the tandem thrust roller bearings at each level are determined based on the initial stiffness and deformation of each bearing component, specifically including:

[0079] Calculate the predicted load of each bearing part based on the initial stiffness of each bearing part and the predicted deformation of each bearing part;

[0080] Based on the predicted load of each bearing component, the predicted load of each level of tandem thrust roller bearing is determined.

[0081] Specifically, after the predicted deformation of each bearing part is obtained, the predicted axial load of each bearing part can be obtained by multiplying the predicted deformation of each bearing part and the initial stiffness of each bearing part. After the predicted axial load of each bearing part is obtained, the predicted axial load of the roller in each stage of the tandem thrust roller bearing can be used as the predicted axial load of each stage of the tandem thrust roller bearing.

[0082] Furthermore, after obtaining the predicted axial loads of each stage of the tandem thrust roller bearings, the structural parameters of the multi-stage tandem thrust roller bearing group can be evaluated according to the predicted axial loads of each stage of the tandem thrust roller bearings. For example, the parameter level of the structural parameters of the multi-stage tandem thrust roller bearing group can be evaluated according to the balance of the predicted axial loads of each stage of the tandem thrust roller bearings (wherein, the corresponding relationship between the balance and the parameter level can be pre-set, etc.), and the structural parameters of one or more bearing parts in the multi-stage tandem thrust roller bearing group can be adjusted, and then the predicted axial loads of each stage of the tandem thrust roller bearings in the adjusted multi-stage tandem thrust roller bearing group are obtained. The impact of the adjustment on the bearing load distribution can be determined by the predicted axial loads of each stage of the tandem thrust roller bearings before and after the adjustment, and the final structural parameters for the multi-stage tandem thrust roller bearing group can be selected according to the comparison results.

[0083] In one implementation, after determining the predicted loads of each stage of the tandem thrust roller bearings based on the initial stiffness and deformation of each bearing component, the method further includes:

[0084] Adjusting structural parameters of several bearing parts in the multi-stage tandem thrust roller bearing group to obtain an adjusted multi-stage tandem thrust roller bearing group;

[0085] Acquire the structural parameters of each bearing part in the adjusted multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing part based on the structural parameters of each bearing part;

[0086] Based on the initial stiffness of each bearing component, a pre-constructed target equation group is solved to obtain the deformation of each bearing component;

[0087] Comparing the predicted axial loads of each stage of the tandem thrust roller bearings in the multi-stage tandem thrust roller bearing group with the predicted axial loads of each stage of the tandem thrust roller bearings in the adjusted multi-stage tandem thrust roller bearing group;

[0088] The structural parameters of the multi-stage tandem thrust roller bearing group are selected based on the comparison results.

[0089] Specifically, the multi-stage tandem thrust roller bearing group and the adjusted multi-stage tandem thrust roller bearing group are subjected to the same system axial force in the process of obtaining the predicted axial load, and when the multi-stage tandem thrust roller bearing group is adjusted multiple times, each time the predicted axial load of each stage of the tandem thrust roller bearing in the adjusted multi-stage tandem thrust roller bearing group is obtained, the same system axial force is applied to the adjusted multi-stage tandem thrust roller bearing group.

[0090] Further, after obtaining the predicted axial loads of the various stages of the tandem thrust roller bearings in the adjusted multi-stage tandem thrust roller bearing group, the predicted axial loads of the various stages of the tandem thrust roller bearings in the multi-stage tandem thrust roller bearing group and the adjusted multi-stage tandem thrust roller bearing groups are compared, wherein the comparison refers to comparing the bearing loads of the multi-stage tandem thrust roller bearing group and the adjusted multi-stage tandem thrust roller bearing groups, and the comparison result is the comparison result of the bearing loads. For this reason, after obtaining the comparison result, the structural parameters of the multi-stage tandem thrust roller bearing group with the best bearing loads can be selected as the final structural parameters of the multi-stage tandem thrust roller bearing group, wherein the multi-stage tandem thrust roller bearing group with the best bearing loads can be an unadjusted multi-stage tandem thrust roller bearing group or an adjusted multi-stage tandem thrust roller bearing group. In other words, the structural parameters of a bearing part can be adjusted to determine its influence on the bearing loads, and then the structural parameters of the bearing part can be adjusted according to the predicted loads of the various stages of the tandem thrust roller bearings, and then the multi-stage tandem thrust roller bearing group can be optimized. Furthermore, the present application covers all force-related bearing parts in the multi-stage tandem thrust roller bearing group during the load prediction process, thereby being able to more comprehensively adjust the structural parameters of the multi-stage tandem thrust roller bearing group.

[0091] In order to further illustrate the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group provided in an embodiment of the present application, the following takes a TBT8 / 120×3 tandem thrust cylindrical roller bearing as an example, and pre-constructs a stiffness calculation component for the component stiffness of each bearing part and a program component for calculating the stiffness of the roller. The implementation process of this method can be:

[0092] Step 1, recording the structural parameters of each bearing part, inputting the structural parameters of each bearing part into various corresponding stiffness calculation components, obtaining the initial stiffness of each bearing part, and using the preset stiffness as the initial stiffness of the roller;

[0093] Step 2, solving the target equation group based on the initial stiffness of each bearing part to obtain the predicted deformation of each bearing part;

[0094] Step 3, inputting the predicted deformation of the roller and the structural parameters of the roller into the program component for calculating the stiffness of the roller, if the stiffness relationship meets the preset requirements, then executing step 4, if the stiffness relationship does not meet the preset requirements, then executing step 2;

[0095] Step 4: Based on the predicted deformation of each bearing part, determine the predicted load of each level of tandem thrust roller bearings, and determine the predicted load average ratio of each level of tandem thrust roller bearings based on each predicted load. For example, the predicted load average ratios of each level of tandem thrust roller bearings are 3.07%, 1.60%, 1.85%, 2.82%, 3.07%, 1.60%, 1.85% and 2.82%, respectively. The calculation formula for the predicted load average ratio of the tandem thrust roller bearings can be:

[0096] or,

[0097] Where Y represents the predicted load ratio of the i-th tandem thrust roller bearing, X i represents the predicted load of the i-th tandem thrust roller bearing, X j It represents the predicted load of the j-th tandem thrust roller bearing, a represents a known constant, the value of which is 0.25, etc., and n represents the number of stages of the multi-stage tandem thrust roller bearing group.

[0098] In summary, this embodiment provides a method for predicting the uniform load of a multi-stage tandem thrust roller bearing group, the method comprising obtaining the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculating the initial stiffness of each bearing part based on the structural parameters of each bearing part; based on the initial stiffness of each bearing part, solving the pre-constructed target equation group to obtain the deformation of each bearing part, and determining the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing part. This application uses the structural parameters of each bearing part to determine the component stiffness of each bearing part, and then predicts the predicted axial load of each bearing part based on the component stiffness, so that the structural parameters of the multi-stage tandem thrust roller bearing group can be adjusted more comprehensively, so that each stage of the tandem thrust roller bearing in the multi-stage tandem thrust roller bearing group is loaded evenly, avoiding excessive load on a single bearing, and improving the overall life of the multi-stage tandem thrust roller bearing group.

[0099] Based on the above-mentioned method for predicting the load distribution of a multi-stage series thrust roller bearing group, this embodiment provides a device for predicting the load distribution of a multi-stage series thrust roller bearing group, such as Figure 3As shown, the multi-stage tandem thrust roller bearing group includes a plurality of tandem thrust cylindrical roller bearings, two adjacent thrust cylindrical roller bearings are subjected to force on the inner sleeve and the cylindrical roller at the same time through a butterfly spring, and the axial force is transmitted to the next stage thrust cylindrical roller bearing through an inner spacer; the multi-stage tandem thrust roller bearing group load-balanced prediction device specifically includes:

[0100] An acquisition module 100 is used to acquire the structural parameters of each bearing component in the multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing component based on the structural parameters of each bearing component;

[0101] A solving module 200 is used to solve a pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part, wherein the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity;

[0102] The determination module 300 is used to determine the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing component.

[0103] Based on the above-mentioned method for predicting the balanced load of a multi-stage tandem thrust roller bearing group, this embodiment provides a computer-readable storage medium, which stores one or more programs. The one or more programs can be executed by one or more processors to implement the steps in the method for predicting the balanced load of a multi-stage tandem thrust roller bearing group as described in the above-mentioned embodiment.

[0104] Based on the above-mentioned method for predicting the load distribution of a multi-stage series thrust roller bearing group, the present application also provides a terminal device, such as Figure 4 As shown, it includes at least one processor 20, a display screen 21, and a memory 22, and may also include a communication interface 23 and a bus 24. The processor 20, the display screen 21, the memory 22, and the communication interface 23 may communicate with each other through the bus 24. The display screen 21 is configured to display a preset user guide interface in the initial setting mode. The communication interface 23 may transmit information. The processor 20 may call the logic instructions in the memory 22 to execute the method in the above embodiment.

[0105] In addition, the logic instructions in the memory 22 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0106] The memory 22 is a computer-readable storage medium that can be configured to store software programs, computer executable programs, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 20 executes functional applications and data processing by running the software programs, instructions or modules stored in the memory 22, that is, implementing the methods in the above embodiments.

[0107] The memory 22 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 22 may include a high-speed random access memory and may also include a non-volatile memory. For example, a variety of 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 disk or an optical disk, may also be a transient storage medium.

[0108] In addition, the specific process of loading and executing the multiple instruction processors in the above-mentioned storage medium and the terminal device has been described in detail in the above-mentioned method, and will not be described one by one here.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 embodiments of the present application.

Claims

1. A method for predicting the load distribution of a multi-stage tandem thrust roller bearing group, characterized in that: The multi-stage tandem thrust roller bearing group includes a plurality of thrust cylindrical roller bearings connected in series, wherein two adjacent thrust cylindrical roller bearings are subjected to force on the inner sleeve and the cylindrical roller at the same time through a butterfly spring, and the axial force is transmitted to the next-stage thrust cylindrical roller bearing through an inner spacer sleeve; the method for predicting the load distribution of the multi-stage tandem thrust roller bearing group specifically includes: Acquire the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing part based on the structural parameters of each bearing part; Based on the initial stiffness of each bearing part, solving a pre-constructed target equation group to obtain the deformation of each bearing part, wherein the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity; Based on the initial stiffness and deformation of each bearing component, the predicted axial load of each level of tandem thrust roller bearing is determined.

2. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 1, characterized in that: The method of determining the predicted axial load of each level of tandem thrust roller bearings based on the initial stiffness and deformation of each bearing component specifically includes: Calculate the predicted axial load of each bearing component based on the initial stiffness of each bearing component and the predicted deformation of each bearing component; Based on the predicted axial load of each bearing component, the predicted axial load of each level of tandem thrust roller bearing is determined.

3. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 1 or 2, characterized in that: After solving the pre-constructed target equation group based on the initial stiffness of each bearing component to obtain the deformation amount of each bearing component, the method further includes: Calculating the calculated stiffness of each roller based on the predicted deformation of each roller; Check whether the stiffness relationship between the initial stiffness and the calculated stiffness of each roller meets the preset requirements; When the stiffness relationship of at least one roller does not meet the preset requirements, the calculated stiffness of each roller is used as the initial stiffness of each roller, and the steps of solving the pre-constructed target equation group based on the initial stiffness of the bearing parts of each bearing component to obtain the deformation of each bearing part are re-executed until the result conditions for re-execution are met.

4. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 1, characterized in that: The construction process of the target equation group is: The multivariate linear equation is constructed based on the fact that the total deformation of the two branches in any mesh is the same, the forces on the left and right of the node are the same, and the forces on each branch are equal; The multivariate linear equation system formed by all constructed multivariate linear equations is taken as the target equation system.

5. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 1, characterized in that: After determining the predicted axial loads of each level of tandem thrust roller bearings based on the initial stiffness and deformation of each bearing component, the method further includes: Adjusting structural parameters of several bearing parts in the multi-stage tandem thrust roller bearing group to obtain an adjusted multi-stage tandem thrust roller bearing group; Re-execute the step of obtaining the structural parameters of each bearing part in the adjusted multi-stage tandem thrust roller bearing group to obtain the predicted axial load of each stage of the tandem thrust roller bearing in the adjusted multi-stage tandem thrust roller bearing group; Comparing the predicted axial loads of each stage of the tandem thrust roller bearings in the multi-stage tandem thrust roller bearing group with the predicted axial loads of each stage of the tandem thrust roller bearings in the adjusted multi-stage tandem thrust roller bearing group; The structural parameters of the multi-stage tandem thrust roller bearing group are selected based on the comparison results.

6. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 5, characterized in that: The multi-stage tandem thrust roller bearing group and the adjusted multi-stage tandem thrust roller bearing group are subjected to the same system axial force during the process of obtaining the predicted axial load.

7. The method for predicting the load distribution of a multi-stage tandem thrust roller bearing group according to claim 1, characterized in that: The calculation of the initial stiffness of each bearing component based on the structural parameters of each bearing component specifically includes: Applying system axial force to the multi-stage tandem thrust roller bearing group; For each bearing part except the roller, the structural parameters of each bearing part are input into the stiffness calculation component corresponding to each bearing part, and the initial stiffness of each bearing part is output through the stiffness calculation component corresponding to each bearing part; For the roller, the preset stiffness corresponding to the axial force of the system is read, and the preset stiffness is used as the initial stiffness of the roller.

8. A device for predicting the load distribution of a multi-stage series thrust roller bearing group, characterized in that: The multi-stage tandem thrust roller bearing group includes a plurality of tandem thrust cylindrical roller bearings, wherein two adjacent thrust cylindrical roller bearings are subjected to force on the inner sleeve and the cylindrical roller at the same time through a butterfly spring, and the axial force is transmitted to the next stage thrust cylindrical roller bearing through an inner spacer sleeve; the multi-stage tandem thrust roller bearing group load-balanced prediction device specifically includes: An acquisition module, used to acquire the structural parameters of each bearing part in the multi-stage tandem thrust roller bearing group, and calculate the initial stiffness of each bearing part based on the structural parameters of each bearing part; A solving module, for solving a pre-constructed target equation group based on the initial stiffness of each bearing part to obtain the deformation of each bearing part, wherein the target equation group is an equation group with the deformation of each bearing part in the multi-stage tandem thrust roller bearing group as an unknown quantity; A determination module is used to determine the predicted axial load of each stage of the tandem thrust roller bearing based on the initial stiffness and deformation of each bearing component.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group as described in any one of claims 1-7.

10. A terminal device, characterized in that: include: Processor and memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the processor implements the steps in the method for predicting the load distribution of a multi-stage tandem thrust roller bearing group as described in any one of claims 1-7.

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