Universal Joint Life Prediction Method, Device, Equipment and Readable Storage Medium

Abstract

The present invention discloses a universal joint life prediction method, device, equipment and readable storage medium, relating to the technical field of universal joints. The universal joint life prediction method includes the following steps: obtaining the rated working intensity of the universal joint and the load working information of a preset load spectrum; calculating the load spectrum working intensity of the universal joint according to the load working information; and determining the predicted life of the universal joint according to the load spectrum working intensity and the rated working intensity. The present invention gets rid of the dependence on empirical constants in the prior art, thereby improving the closeness between the calculation result and the actual test result, and thus effectively improving the accuracy of the universal joint life prediction.

Description

Technical Field

[0001] The present invention relates to the technical field of universal joints, and in particular to a method, device, equipment and readable storage medium for predicting the life of a universal joint. Background Art

[0002] With the development of the automotive industry, the requirements for various parts in automobiles have gradually increased. A universal joint, namely a universal joint, is a mechanical part that realizes power transmission at a variable angle and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device in the automotive drive system. As an important part of the automotive power transmission, predicting the working life of the universal joint to support the selection of the universal joint solution has become an important method for the design and selection of automotive drive shafts.

[0003] The existing methods for predicting the life of a universal joint usually first determine the proportion of each load condition in the preset load spectrum, thereby calculating the average working speed, average working torque and average included angle coefficient of the preset load spectrum, and then calculating the effective working duration through an empirical constant and the average working speed, average working torque and average included angle coefficient. The ratio between the effective working duration and the cycle duration of the preset load spectrum is used as the life of the universal joint (i.e., the maximum number of cycles). However, because the empirical constant used to calculate the effective working duration is highly subjective, the calculation result is quite different from the actual test result, and the accuracy of predicting the life of the universal joint is relatively low, which affects the selection of the universal joint solution in automobiles. Summary of the Invention

[0004] The main object of the present invention is to provide a method for predicting the life of a universal joint, aiming to solve the technical problem that the empirical constant selected in the calculation process of the existing method for predicting the life of a universal joint is highly subjective, resulting in relatively low accuracy in predicting the life of the universal joint.

[0005] To achieve the above object, in a first aspect, the present invention provides a method for predicting the life of a universal joint, the method for predicting the life of a universal joint includes:

[0006] Obtain the rated working strength of the universal joint and the load working information of the preset load spectrum;

[0007] Calculate the load spectrum working strength of the universal joint according to the load working information;

[0008] Determine the predicted life of the universal joint according to the load spectrum working strength and the rated working strength.

[0009] According to the first aspect, before the step of obtaining the rated working strength of the universal joint, it includes:

[0010] Obtain the rated working information of the universal joint;

[0011] Calculate the rated working strength of the universal joint according to the rated working information.

[0012] According to the first aspect, or any implementation manner of the above first aspect, the rated working information includes rated working torque, rated working speed, and rated working included angle. The steps of calculating the rated working strength of the universal joint according to the rated working information include:

[0013] Obtain the strength index of the universal joint;

[0014] Calculate the rated included angle coefficient of the universal joint according to the rated working included angle;

[0015] Calculate the rated working strength of the universal joint according to the rated working torque, rated working speed, rated included angle coefficient, and strength index.

[0016] According to the first aspect, or any implementation manner of the above first aspect, the calculation formula of the rated included angle coefficient is as follows:

[0017] A0 = (1 - sinβ0)cos²β0, where A0 is the rated included angle coefficient and β0 is the rated working included angle of the universal joint.

[0018] According to the first aspect, or any implementation manner of the above first aspect, the load working information includes the load working torque, load working speed, and load included angle coefficient corresponding to each load condition in the preset load spectrum. The steps of calculating the load spectrum working strength of the universal joint according to the load working information include:

[0019] Obtain the strength index of the universal joint;

[0020] Calculate the single - condition working strength of each load condition according to the load working torque, load working speed, load included angle coefficient, and strength index;

[0021] Take the sum of the single - condition working strengths as the load spectrum working strength of the universal joint.

[0022] According to the first aspect, or any implementation manner of the above first aspect, the calculation formula of the single - condition working strength is as follows:

[0023] DV1 = (M1 / A1) m *N1, where DV1 is the single - condition working strength, M1 is the load working torque, A1 is the load included angle coefficient, m is the strength index, and N1 is the load working speed.

[0024] According to the first aspect, or any implementation manner of the above first aspect, the step of determining the predicted life of the universal joint according to the working intensity of the load spectrum and the rated working intensity includes:

[0025] Calculating the maximum total number of cycles of the universal joint under the preset load spectrum according to the rated working intensity and the working intensity of the load spectrum;

[0026] Taking the maximum total number of cycles as the predicted life of the universal joint.

[0027] In a second aspect, the present invention provides a device for predicting the life of a universal joint. The device for predicting the life of a universal joint includes:

[0028] An information acquisition module, configured to acquire the rated working intensity of the universal joint and the load working information of the preset load spectrum;

[0029] A first calculation module, configured to calculate the working intensity of the load spectrum of the universal joint according to the load working information;

[0030] A life determination module, configured to determine the predicted life of the universal joint according to the working intensity of the load spectrum and the rated working intensity.

[0031] According to the second aspect, the device for predicting the life of the universal joint further includes: a second calculation module; the second calculation module is configured to

[0032] Acquire the rated working information of the universal joint;

[0033] Calculate the rated working intensity of the universal joint according to the rated working information.

[0034] According to the second aspect, or any implementation manner of the above second aspect, the rated working information includes the rated working torque, the rated working speed, and the rated working angle. The second calculation module is further configured to:

[0035] Acquire the strength index of the universal joint;

[0036] Calculate the rated angle coefficient of the universal joint according to the rated working angle;

[0037] Calculate the rated working intensity of the universal joint according to the rated working torque, the rated working speed, the rated angle coefficient, and the strength index.

[0038] According to the second aspect, or any implementation manner of the above second aspect, the calculation formula of the rated angle coefficient is as follows:

[0039] A0 = (1 - sinβ0)cos²β0, where A0 is the rated included angle coefficient and β0 is the rated working included angle of the universal joint.

[0040] According to the second aspect, or any implementation manner of the above second aspect, the load working information includes the load working torque, load working speed, and load included angle coefficient corresponding to each load condition in the preset load spectrum. The first calculation module is further configured to:

[0041] Obtain the strength index of the universal joint;

[0042] Calculate the single-condition working strength of each load condition according to the load working torque, load working speed, load included angle coefficient, and strength index;

[0043] Take the sum of the single-condition working strengths as the load spectrum working strength of the universal joint.

[0044] According to the second aspect, or any implementation manner of the above second aspect, the calculation formula for the single-condition working strength is as follows:

[0045] DV1 = (M1 / A1) m * N1, where DV1 is the single-condition working strength, M1 is the load working torque, A1 is the load included angle coefficient, m is the strength index, and N1 is the load working speed.

[0046] According to the second aspect, or any implementation manner of the above second aspect, the life determination module is further configured to:

[0047] Calculate the maximum total number of cycles of the universal joint under the preset load spectrum according to the rated working strength and the load spectrum working strength;

[0048] Take the maximum total number of cycles as the predicted life of the universal joint.

[0049] In a third aspect, the present invention provides a universal joint life prediction device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the universal joint life prediction method as described above.

[0050] The third aspect and any implementation manner of the third aspect respectively correspond to the first aspect and any implementation manner of the first aspect. The technical effects corresponding to the third aspect and any implementation manner of the third aspect can be referred to the technical effects corresponding to the first aspect and any implementation manner of the first aspect above, and will not be elaborated here.

[0051] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to execute the universal joint life prediction method as described in any one of the above first aspect or possible implementations of the first aspect.

[0052] The fourth aspect and any implementation of the fourth aspect respectively correspond to the first aspect and any implementation of the first aspect. For the technical effects corresponding to the fourth aspect and any implementation of the fourth aspect, reference may be made to the technical effects corresponding to the first aspect and any implementation of the first aspect above, which will not be elaborated here.

[0053] Fifthly, an embodiment of the present invention provides a computer program, which includes instructions for executing the universal joint life prediction method in the first aspect and any possible implementation of the first aspect.

[0054] The fifth aspect and any implementation of the fifth aspect respectively correspond to the first aspect and any implementation of the first aspect. For the technical effects corresponding to the fifth aspect and any implementation of the fifth aspect, reference may be made to the technical effects corresponding to the first aspect and any implementation of the first aspect above, which will not be elaborated here.

[0055] The present invention provides a universal joint life prediction method, device, equipment and readable storage medium. By obtaining the rated working intensity of the universal joint and the load working information of a preset load spectrum. Then, according to the load working information, the load spectrum working intensity of the universal joint is calculated. Thus, according to the load spectrum working intensity and the rated working intensity, the maximum total number of cycles corresponding to the universal joint under the preset load spectrum can be obtained, so as to determine the predicted life of the universal joint. Thereby, it avoids the problem in the prior art that an empirical constant needs to be used to calculate the effective working duration, which results in a strong subjectivity of the empirical constant and a low accuracy of the universal joint life prediction. Since the method adopted by the present invention gets rid of the dependence on the empirical constant, the closeness between the calculation result and the actual test result is improved, thereby effectively improving the accuracy of the universal joint life prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the fatigue curve related to the universal joint life prediction method of the present invention;

[0057] Figure 2 It is a schematic flowchart of the first embodiment of the universal joint life prediction method of the present invention;

[0058] Figure 3 It is a schematic flowchart of the second embodiment of the universal joint life prediction method of the present invention;

[0059] Figure 4 It is a structural schematic diagram of the universal joint life prediction device of the present invention;

[0060] Figure 5 It is a device structure schematic diagram of the hardware operating environment involved in the solution of the embodiment of the present invention.

[0061] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts belong to the scope of protection of the present application.

[0063] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. These three situations.

[0064] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, rather than to describe the specific order of the target objects.

[0065] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

[0066] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0067] With the development of the automotive industry, the requirements for various parts in automobiles have gradually increased. The universal joint, namely the universal joint, is a mechanical part that realizes variable-angle power transmission and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device of the automotive drive system. As an important part of the automotive power transmission, the automotive constant velocity universal joint has become an important method for the design and selection of automotive drive shafts by predicting the working life of the universal joint to support the selection of the universal joint solution.

[0068] Refer to Figure 1 , Figure 1 which is a schematic diagram of the fatigue curve involved in the universal joint life prediction method of the present invention. Figure 1 In it, the fatigue strength S of the component is taken as the ordinate, and the logarithm of the fatigue life lg N is taken as the abscissa. S1 is the fatigue strength corresponding to the fatigue life of N1 cycle times; S f is the fatigue strength limit of the component, and N f is the number of cycles corresponding to the fatigue strength limit, that is, the maximum total number of cycles (maximum fatigue life) of the component. As Figure 1 shown, according to the strength theory, the curve equation of the S-N fatigue curve in its finite life range is usually a power function. Thus, the S-N fatigue curve can be represented by the following function:

[0069]

[0070] where S is the stress applied to the component, m is the strength index corresponding to the component, and the strength index is determined according to the nature of the stress applied to the component (such as tensile stress, compressive stress, bending stress, torsional stress, contact stress, etc.) and the material used for the component (such as copper, iron, steel, aluminum, etc.). The common value range of the strength index m is approximately 3 ≤ m ≤ 7. C is a constant determined by known component conditions (such as information on the torque, rotational speed, included angle, etc. of the universal joint).

[0071] The existing universal joint life prediction methods usually first determine the proportion of each load condition in the preset load spectrum, thereby calculating the average working speed, average working torque, and average included angle coefficient of the preset load spectrum, and then calculating the effective working duration through an empirical constant and the average working speed, average working torque, and average included angle coefficient. The ratio between the effective working duration and the cycle duration of the preset load spectrum is used as the life (i.e., the maximum number of cycles) of the universal joint. However, because the empirical constant selected for calculating the effective working duration is highly subjective, the calculation result has a large difference from the actual test result, the accuracy of the universal joint life prediction is relatively low, and it affects the scheme selection of the universal joint in the vehicle.

[0072] The following will illustrate the universal joint life prediction method of the present invention in combination with some embodiments:

[0073] The execution subject of the universal joint life prediction method of the present invention can be a universal joint life prediction device, and the universal joint life prediction device can be a device such as a PC (Personal Computer, personal computer), a tablet computer, a portable computer, or a server.

[0074] In an embodiment of the present invention, the rated working strength of the universal joint and the load working information of the preset load spectrum are obtained. Then, according to the load working information, the load spectrum working strength of the universal joint is calculated. Thus, according to the load spectrum working strength and the rated working strength, the maximum total number of cycles corresponding to the universal joint under the preset load spectrum can be obtained, so as to determine the predicted life of the universal joint. Thereby, it avoids the problem in the prior art that the effective working duration needs to be calculated by relying on empirical constants, and the subjectivity of the empirical constants is relatively strong, resulting in low accuracy of the life prediction of the universal joint. Since the method adopted in the present invention gets rid of the dependence on empirical constants, the closeness between the calculation result and the actual test result is improved, thereby effectively improving the accuracy of the life prediction of the universal joint.

[0075] Please refer to Figure 2 , Figure 2 , which is a schematic flowchart of the first embodiment of the universal joint life prediction method of the present invention. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0076] The first embodiment of the present invention provides a universal joint life prediction method, and the universal joint life prediction method includes the following steps:

[0077] Step S100, obtaining the rated working strength of the universal joint and the load working information of the preset load spectrum;

[0078] In this embodiment, it should be noted that the rated working strength is composed of rated working information and strength indexes such as the rated working torque, rated working speed, and rated working angle of the universal joint, where the strength index is determined according to the nature of the stress (such as tensile stress, compressive stress, bending stress, torsional stress, contact stress, etc.) received by the universal joint and the material used for the universal joint (such as copper, iron, steel, aluminum, etc.), and the common value range of the strength index is 3 ≤ m ≤ 7. Of course, it can be understood that the actual value range of the strength index can exceed the common value range, that is, m < 3 or m > 7.

[0079] In addition, it should also be noted that the preset load spectrum is the typical load time history borne by the universal joint, and the graph, table, matrix, or other probability characteristic values representing each load condition of the universal joint in the typical load time history obtained after mathematical statistics processing. Wherein the load spectrum includes at least one load condition. The load working information of the preset load spectrum can include information such as the load working torque, load working speed, and load angle coefficient corresponding to each load condition in the preset load spectrum. It can be understood that the load working information can be obtained by collecting data during the process of the universal joint working according to the preset load spectrum.

[0080] Step S200: Calculate the working strength of the load spectrum of the universal joint based on the load working information.

[0081] In this embodiment, it should be noted that the load working information includes the load working torque, load working speed, and load angle coefficient corresponding to each load condition in the preset load spectrum, where the load angle coefficient is determined by the load working angle of the universal joint.

[0082] The strength index of the universal joint can be obtained. Then, based on the load working torque, load working speed, load angle coefficient, and strength index, the single-condition working strength of each load condition in the preset load spectrum can be calculated. Since the preset load spectrum includes each load condition, the sum of the single-condition working strengths is used as the load spectrum working strength of the universal joint, that is, the working strength of the universal joint when working in a cycle according to the preset load spectrum.

[0083] Among them, the load working information includes the load working torque, load working speed, and load angle coefficient corresponding to each load condition in the preset load spectrum. The step of calculating the load spectrum working strength of the universal joint based on the load working information includes:

[0084] Step S210: Obtain the strength index of the universal joint.

[0085] Step S220: Calculate the single-condition working strength of each load condition according to the load working torque, load working speed, load angle coefficient, and strength index.

[0086] Step S230: Use the sum of the single-condition working strengths as the load spectrum working strength of the universal joint.

[0087] In this embodiment, it should be noted that the load working information includes the load working torque, load working speed, and load angle coefficient corresponding to each load condition in the preset load spectrum. The load working torque is the torque input to the universal joint under the load condition when the universal joint works according to the preset load spectrum; the load working speed is the speed of the universal joint under the load condition when the universal joint works according to the preset load spectrum; the load angle coefficient is determined by the load working angle of the universal joint, and the load working angle is the axial angle of the universal joint under the load condition when the universal joint works according to the preset load spectrum.

[0088] Among them, the calculation formula of the single-condition working strength is as follows:

[0089] DV1 = (M1 / A1) m * N1;

[0090] Among them, DV1 is the working intensity under a single condition, M1 is the load working torque, A1 is the load angle coefficient, m is the strength index, and N1 is the load working speed.

[0091] Among them, the strength index is determined according to the nature of the stress (such as tensile stress, compressive stress, bending stress, torsional stress, contact stress, etc.) received by the universal joint and the material (such as copper, iron, steel, aluminum, etc.) used for the universal joint. The common value range of the strength index is 3 ≤ m ≤ 7. Exemplarily, when the strength index m = 3, the calculation formula of the working intensity under a single condition can be as follows: DV1 = (M1 / A1) 3 *N1.

[0092] Among them, the calculation formula of the load angle coefficient is as follows:

[0093] A1 = (1 - sinβ1)cos²β1;

[0094] Among them, A1 is the load angle coefficient, and β1 is the load working angle of the universal joint.

[0095] Among them, the calculation formula of the working intensity of the load spectrum of the universal joint is as follows:

[0096] DV = ΣDV1;

[0097] Among them, DV is the working intensity of the load spectrum, and DV1 is the working intensity under a single condition.

[0098] Thus, in this embodiment, by obtaining the strength index of the universal joint; according to the load working torque, load working speed, load angle coefficient and strength index, calculating the working intensity under a single condition for each load condition; and taking the cumulative sum of the working intensity under a single condition as the working intensity of the load spectrum of the universal joint. Based on the objective data such as the obtained load working torque, load working speed, load angle coefficient and strength index, the working intensity of the load spectrum for a single cycle when the universal joint works according to the preset load spectrum is calculated, improving the objectivity and accuracy of the working intensity of the load spectrum.

[0099] Step S300, determining the predicted life of the universal joint according to the working intensity of the load spectrum and the rated working intensity.

[0100] After obtaining the working intensity of the load spectrum and the rated working intensity, the maximum total number of cycles of the universal joint under the preset load spectrum can be calculated based on the rated working intensity and the working intensity of the load spectrum. Then, the maximum total number of cycles is taken as the predicted life of the universal joint. Of course, it can be understood that, for the purpose of leaving a margin, the predicted life of the universal joint can also be determined according to the maximum total number of cycles and a preset correction parameter. Exemplarily, the product of the maximum total number of cycles and the preset correction parameter can be taken as the predicted life of the universal joint, where the preset correction parameter is a value less than 1, such as 0.9, 0.85, 0.8, etc. Or the maximum total number of cycles can be divided by the preset correction parameter as the predicted life of the universal joint, where the preset correction parameter is a value greater than 1, such as 1.1, 1.15, 1.2, etc.

[0101] Among them, the step of determining the predicted life of the universal joint according to the working intensity of the load spectrum and the rated working intensity includes:

[0102] Step S310, calculating the maximum total number of cycles of the universal joint under the preset load spectrum according to the rated working intensity and the working intensity of the load spectrum;

[0103] Step S320, taking the maximum total number of cycles as the predicted life of the universal joint.

[0104] Among them, the rated working intensity can be divided by the working intensity of the load spectrum to obtain the maximum total number of cycles of the universal joint under the preset load spectrum. Thus, the maximum total number of cycles can be taken as the predicted life of the universal joint.

[0105] Among them, the calculation formula of the maximum total number of cycles is as follows:

[0106] Nmax = DV / DV0;

[0107] Among them, Nmax is the maximum total number of cycles of the universal joint under the preset load spectrum, DV is the working intensity of the load spectrum, and DV0 is the rated working intensity.

[0108] In the first embodiment of the present invention, the rated working strength of the universal joint and the load working information of the preset load spectrum are obtained. Then, according to the load working information, the load spectrum working strength of the universal joint is calculated. Thus, according to the load spectrum working strength and the rated working strength, the maximum total number of cycles corresponding to the universal joint under the preset load spectrum can be obtained, so as to determine the predicted life of the universal joint. Thereby, it avoids the problem in the prior art that the effective working duration needs to be calculated by means of an empirical constant, and the subjectivity of the empirical constant is relatively strong, resulting in low accuracy of the life prediction of the universal joint. Since the method adopted in the present invention gets rid of the dependence on the empirical constant, the closeness between the calculation result and the actual test result is improved, thereby effectively improving the accuracy of the life prediction of the universal joint.

[0109] Refer to Figure 3 , Figure 3 which is a schematic flowchart of the second embodiment of the method for predicting the life of the universal joint of the present invention.

[0110] The second embodiment of the present invention provides a method for predicting the life of a universal joint, which includes, before the step of obtaining the rated working strength of the universal joint:

[0111] Step A10, obtaining the rated working information of the universal joint;

[0112] Step A20, calculating the rated working strength of the universal joint according to the rated working information.

[0113] In this embodiment, it should be noted that the rated working information includes the rated working torque, the rated working speed and the rated working angle.

[0114] It can be understood that, similar to the load working strength, the strength index of the universal joint can be obtained; according to the rated working angle, the rated angle coefficient of the universal joint can be calculated. Then, according to the rated working torque, the rated working speed, the rated angle coefficient and the strength index, the rated working strength of the universal joint can be calculated.

[0115] Wherein, the rated working information includes the rated working torque, the rated working speed and the rated working angle, and the step of calculating the rated working strength of the universal joint according to the rated working information includes:

[0116] Step A21, obtaining the strength index of the universal joint;

[0117] Step A22, calculating the rated angle coefficient of the universal joint according to the rated working angle;

[0118] Step A23: Calculate the rated working strength of the universal joint based on the rated working torque, rated working speed, rated included angle coefficient, and strength index.

[0119] It should be noted that the rated working information includes the rated working torque, rated working speed, and rated working included angle. The rated working torque is the rated torque input to the universal joint; the rated working speed is the rated speed of the universal joint; the rated working included angle is the rated included angle between the axes of the universal joint.

[0120] After obtaining the strength index of the universal joint, the rated included angle coefficient of the universal joint can be calculated based on the rated working included angle;

[0121] Among them, the calculation formula of the rated included angle coefficient is as follows:

[0122] A0 = (1 - sinβ0)cos²β0;

[0123] Among them, A0 is the rated included angle coefficient, and β0 is the rated working included angle of the universal joint.

[0124] Then, the rated working strength of the universal joint can be calculated based on the rated working torque, rated working speed, rated included angle coefficient, and strength index.

[0125] Among them, the calculation formula of the rated working strength is as follows:

[0126] DV0 = (M0 / A0) m *N0;

[0127] Among them, DV0 is the rated working strength, M0 is the rated working torque, A0 is the rated included angle coefficient, m is the strength index, and N0 is the rated working speed.

[0128] In the second embodiment of the present invention, by obtaining the rated working information of the universal joint; calculating the rated working strength of the universal joint according to the rated working information. Thus, the rated working strength of the universal joint is calculated based on objective data such as the rated working torque, rated working speed, rated included angle coefficient, and strength index, improving the objectivity and accuracy of the rated working strength. Thereby, the accuracy of the predicted life of the universal joint determined based on the working strength of the load spectrum and the rated working strength is also improved.

[0129] Refer to Figure 4 , Figure 4 which is the structural schematic diagram of the universal joint life prediction device of the present invention.

[0130] The present invention also provides a universal joint life prediction device, and the universal joint life prediction device includes:

[0131] An information acquisition module 10, configured to acquire the rated working strength of the universal joint and the load working information of the preset load spectrum;

[0132] A first calculation module 20, configured to calculate the load spectrum working strength of the universal joint according to the load working information;

[0133] A life determination module 30, configured to determine the predicted life of the universal joint according to the load spectrum working strength and the rated working strength.

[0134] Optionally, the universal joint life prediction device further includes: a second calculation module; the second calculation module is configured to

[0135] acquire the rated working information of the universal joint;

[0136] calculate the rated working strength of the universal joint according to the rated working information.

[0137] Optionally, the rated working information includes a rated working torque, a rated working speed, and a rated working included angle, and the second calculation module is further configured to:

[0138] acquire the strength index of the universal joint;

[0139] calculate the rated included angle coefficient of the universal joint according to the rated working included angle;

[0140] calculate the rated working strength of the universal joint according to the rated working torque, the rated working speed, the rated included angle coefficient, and the strength index.

[0141] Optionally, the calculation formula of the rated included angle coefficient is as follows:

[0142] A0 = (1 - sinβ0)cos²β0, where A0 is the rated included angle coefficient and β0 is the rated working included angle of the universal joint.

[0143] Optionally, the load working information includes the load working torque, the load working speed, and the load included angle coefficient corresponding to each load condition in the preset load spectrum, and the first calculation module 20 is further configured to:

[0144] acquire the strength index of the universal joint;

[0145] calculate the single-condition working strength of each load condition according to the load working torque, the load working speed, the load included angle coefficient, and the strength index;

[0146] take the sum of the single-condition working strengths as the load spectrum working strength of the universal joint.

[0147] Optionally, the calculation formula of the working intensity under a single working condition is as follows:

[0148] DV1 = (M1 / A1) m * N1, where DV1 is the working intensity under a single working condition, M1 is the load working torque, A1 is the load included angle coefficient, m is the strength index, and N1 is the load working speed.

[0149] Optionally, the life determination module 30 is further configured to:

[0150] Calculate the maximum total number of cycles of the universal joint under the preset load spectrum according to the rated working intensity and the load spectrum working intensity;

[0151] Use the maximum total number of cycles as the predicted life of the universal joint.

[0152] As Figure 5 shown, Figure 5 It is a schematic diagram of the device structure of the hardware operating environment involved in the solution of the embodiment of the present invention.

[0153] Specifically, the universal joint life prediction device may be a device such as a PC (Personal Computer), a tablet computer, a portable computer, or a server.

[0154] As Figure 5 shown, the universal joint life prediction device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (RandomAccess Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0155] Those skilled in the art can understand, Figure 5The device structure shown does not constitute a limitation on the universal joint life prediction device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0156] As Figure 5 shown, the memory 1005, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a universal joint life prediction application program.

[0157] In Figure 5 the device shown, the network interface 1004 is mainly used to connect to the background server and communicate with the background server for data; the user interface 1003 is mainly used to connect to the client and communicate with the client for data; and the processor 1001 can be used to call the universal joint life prediction program stored in the memory 1005 to implement the operations in the universal joint life prediction method provided in the above embodiments.

[0158] In addition, an embodiment of the present invention further provides a vehicle, which includes the above universal joint life prediction device. Of course, it can be understood that the vehicle also includes other devices such as an energy storage device and a driving device to ensure the normal operation of the vehicle.

[0159] In addition, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the operations in the universal joint life prediction method provided in the above embodiments, and the specific steps are not elaborated here too much.

[0160] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity / operation / object from another entity / operation / object, and do not necessarily require or imply any actual relationship or order between these entities / operations / objects; the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or system including the element.

[0161] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For the relevant parts, please refer to the partial description of the method embodiments. The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated. Some or all of the modules in can be selected according to actual needs to achieve the purpose of the solution of the present invention. A person of ordinary skill in the art can understand and implement it without creative work.

[0162] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0163] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, vehicle, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0164] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for predicting the service life of a universal joint, characterized in that, The universal joint life prediction method includes the following steps: Obtain the rated working intensity of the universal joint and the load working information of the preset load spectrum; Wherein the rated working intensity is determined by the rated working torque, rated working speed, rated working angle and strength index of the universal joint, and the strength index is determined according to the stress nature received by the universal joint and the material used for the universal joint; the load working information includes the load working torque, load working speed and load angle coefficient corresponding to each load condition in the preset load spectrum; Calculate the load spectrum working intensity of the universal joint according to the load working information; Wherein the load spectrum working intensity of the universal joint is the accumulation sum of the single-condition working intensities of each load condition; the calculation formula of the single-condition working intensity is as follows: DV1 = (M1 / A1) m * N1, where DV1 is the working intensity under a single condition, M1 is the working torque of the load, A1 is the load angle coefficient, m is the strength index, and N1 is the working speed of the load; Determine the predicted life of the universal joint according to the load spectrum working intensity and the rated working intensity; Wherein the predicted life of the universal joint is the product of the maximum total number of cycles and the preset correction parameter, and the maximum total number of cycles is the rated working intensity divided by the load spectrum working intensity.

2. The universal joint life prediction method according to claim 1, characterized in that, Before the step of obtaining the rated working intensity of the universal joint, it includes: Obtain the rated working information of the universal joint; Calculate the rated working intensity of the universal joint according to the rated working information.

3. The universal joint life prediction method according to claim 2, wherein The rated working information includes the rated working torque, rated working speed and rated working angle. The step of calculating the rated working intensity of the universal joint according to the rated working information includes: Obtain the strength index of the universal joint; Calculate the rated angle coefficient of the universal joint according to the rated working angle; Calculate the rated working intensity of the universal joint according to the rated working torque, rated working speed, rated angle coefficient and strength index.

4. The universal joint life prediction method according to claim 3, wherein The calculation formula of the rated angle coefficient is as follows: A0 = (1 - sinβ0)cos²β0, where A0 is the rated angle coefficient and β0 is the rated working angle of the universal joint.

5. The universal joint life prediction method according to claim 1, characterized in that The step of calculating the load spectrum working intensity of the universal joint according to the load working information includes: Obtain the strength index of the universal joint; Calculate the single-condition working intensity of each load condition according to the load working torque, load working speed, load angle coefficient and strength index; Take the accumulation sum of the single-condition working intensities as the load spectrum working intensity of the universal joint.

6. A universal joint life prediction device, characterized in that, The universal joint life prediction device includes: An information acquisition module, used to obtain the rated working intensity of the universal joint and the load working information of the preset load spectrum; Wherein the rated working intensity is determined by the rated working torque, rated working speed, rated working angle and strength index of the universal joint, and the strength index is determined according to the stress nature received by the universal joint and the material used for the universal joint; the load working information includes the load working torque, load working speed and load angle coefficient corresponding to each load condition in the preset load spectrum; A first calculation module, used to calculate the load spectrum working intensity of the universal joint according to the load working information; wherein the load spectrum working intensity of the universal joint is the sum of the single working intensities of each of the load conditions; the calculation formula for the single working intensity is as follows: DV1 = (M1 / A1) m * N1, where DV1 is the working intensity under a single condition, M1 is the working torque of the load, A1 is the load angle coefficient, m is the strength index, and N1 is the working speed of the load; a life determination module, configured to determine a predicted life of the universal joint according to the load spectrum working intensity and the rated working intensity; wherein the predicted life of the universal joint is the product of the maximum total number of cycles and a preset correction parameter, and the maximum total number of cycles is the rated working intensity divided by the load spectrum working intensity.

7. A universal joint life prediction device, characterized in that, The universal joint life prediction device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the universal joint life prediction method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium, characterized in that, A universal joint life prediction program is stored on the computer-readable storage medium, and when the universal joint life prediction program is executed by a processor, the steps of the universal joint life prediction method according to any one of claims 1 to 5 are implemented.

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