A reliability evaluation method, device and equipment for a loosening prevention fastening system

Abstract

The present invention provides a method, device and equipment for evaluating the reliability of a loosening-preventing fastening system, which relates to the technical field of research on the quality and reliability of fasteners. The method for evaluating the reliability of the loosening-preventing fastening system includes: obtaining the test information of the loosening-preventing fastening system; the test information includes: the connection state information of the loosening-preventing fastening system, the working condition information of the loosening-preventing fastening system, and the key performance parameters of the loosening-preventing fastener; the loosening-preventing fastening system includes a loosening-preventing fastener; based on the test information, a reliability evaluation and analysis result of the loosening-preventing fastening system is obtained. The solution of the present invention can systematically and comprehensively evaluate and verify the reliability of the loosening-preventing fastening system by obtaining the test information of the loosening-preventing fastening system and verifying and evaluating the reliability of the loosening-preventing fastening system according to the test information, and obtain a reliability evaluation and analysis result of the loosening-preventing fastening system, so as to discover the problems existing in the reliability of the loosening-preventing fastening system.

Description

Technical Field

[0001] The present invention relates to the technical field of fastener quality and reliability research, and particularly relates to a method for evaluating the reliability of anti-loosening fasteners. Background Art

[0002] Fasteners are known as the "rice of industry" and are one of the basic parts with the widest application foundation. Fasteners are important connection points for transmitting loads, and their reliability is closely related to the safe and reliable operation of the entire equipment or structure. With the development of aerospace equipment, higher requirements are put forward for reliability, performance, etc. Even local minor connection looseness, thread wear, etc. will still have an adverse impact on the equipment and even cause serious consequences. The design and verification evaluation of anti-loosening fasteners have always been an important link in fastener design. Loosening failure is a common fastener failure mode. Unreasonable structural design, unreasonable pre-tightening force design, out-of-control quality of anti-loosening fasteners, a large number of repeated disassembly and assembly times, and improper installation will all lead to the failure of the anti-loosening structure. Therefore, the reliability evaluation of anti-loosening fasteners is a systematic project that requires evaluating its performance from multiple aspects. Currently, the reliability evaluation methods for anti-loosening fasteners all evaluate from a single aspect of the reliability of anti-loosening fasteners, lacking a systematic evaluation method. Therefore, there is an urgent need to establish a systematic reliability evaluation method for anti-loosening fastening systems. Summary of the Invention

[0003] Embodiments of the present invention provide a method, device, and equipment for evaluating the reliability of an anti-loosening fastening system to solve the problem that there is no systematic reliability evaluation method for anti-loosening fastening systems in the prior art.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] Embodiments of the present invention provide a method for evaluating the reliability of an anti-loosening fastening system, including:

[0006] Obtaining test information of the anti-loosening fastening system; the test information includes: connection state information of the anti-loosening fastening system, working condition information of the anti-loosening fastening system, and key performance parameters of the anti-loosening fastener; the anti-loosening fastening system includes the anti-loosening fastener;

[0007] Based on the test information, obtaining the reliability evaluation analysis result of the anti-loosening fastening system.

[0008] Optionally, the reliability evaluation analysis result includes at least one of the following:

[0009] The assembly quality verification evaluation result of the anti-loosening fastening system;

[0010] The pre-tightening force verification evaluation result of the anti-loosening fastening system;

[0011] The verification and evaluation results of the slip force of the bolt joint of the anti-loosening fastening system;

[0012] The verification and evaluation results of the lateral vibration of the anti-loosening fastening system;

[0013] The verification and evaluation results of the lateral reliability of the anti-loosening fastening system;

[0014] The verification and evaluation results of the environmental adaptability of the anti-loosening fastening system.

[0015] Optionally, the anti-loosening fastening system further includes: a bolt used in conjunction with the anti-loosening fastener, a nut used in conjunction with the anti-loosening fastener, and a connected part;

[0016] The connection state information of the anti-loosening fastening system includes: the component state information of the anti-loosening fastening system and the installation state information of the anti-loosening fastening system;

[0017] Among them, the component state information of the anti-loosening fastening system includes: the state analysis information of the anti-loosening fastener, the state analysis information of the bolt used in conjunction with the anti-loosening fastener, the state analysis information of the nut used in conjunction with the anti-loosening fastener, and the state analysis information of the connected part;

[0018] The installation state information includes: the design pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0019] Optionally, the working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the information on the number of repeated uses of the anti-loosening fastening system;

[0020] Among them, the working environment information includes at least one of the following:

[0021] Working environment temperature parameter;

[0022] Working environment corrosion condition parameter;

[0023] Working environment vibration parameter.

[0024] Optionally, in the case where the reliability evaluation analysis result includes the verification and evaluation results of the pre-tightening force of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes:

[0025] Based on the test information, measuring the installation pre-tightening force of the anti-loosening fastening system through the bolt of the anti-loosening fastening system to obtain the pre-tightening force measurement result;

[0026] Based on the measured pre-tightening force result and the designed pre-tightening force of the anti-loosening fastening system, obtain the pre-tightening force verification and evaluation result of the anti-loosening fastening system.

[0027] Optionally, when the reliability evaluation and analysis result includes the bolt joint slip force verification and evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation and analysis result of the anti-loosening fastening system based on the test information includes:

[0028] Based on the test information, determine the movement state between the connected parts when the designed lateral shear force is applied to the connected parts in the anti-loosening fastening system;

[0029] According to the movement state, obtain the bolt joint slip force verification and evaluation result of the anti-loosening fastening system.

[0030] Optionally, when the reliability evaluation and analysis result includes the lateral vibration verification and evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation and analysis result of the anti-loosening fastening system based on the test information includes:

[0031] Based on the test information, determine the anti-loosening ability obtained by the anti-loosening fastening system when performing a lateral vibration test according to a preset test standard;

[0032] Compare the anti-loosening ability with the standard anti-loosening ability corresponding to the preset test standard to obtain the lateral vibration verification and evaluation result of the anti-loosening fastening system.

[0033] Optionally, when the reliability evaluation and analysis result includes the lateral reliability verification and evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation and analysis result of the anti-loosening fastening system based on the test information includes:

[0034] Take the mean value of the first preset number of residual pre-tightening forces generated by the anti-loosening fastening system vibrating cyclically for the first preset number of times as the reference value, and take the first percentage of the reference value as the failure criterion;

[0035] According to the ratio of the first preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the first mean value and the first standard deviation corresponding to the anti-loosening fastening system vibrating cyclically for the first preset number of times;

[0036] Determine the second preset number of residual pre-tightening forces generated by the anti-loosening fastening system vibrating cyclically for the second preset number of times;

[0037] According to the ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the second mean value and the second standard deviation corresponding to the anti-loosening fastening system vibrating cyclically for the second preset number of times;

[0038] Based on the residual pre-tightening force and the initial pre-tightening force of the second preset quantity, obtain the distribution of the residual pre-tightening force corresponding to the second preset number of cycles of vibration of the anti-loosening fastening system;

[0039] Based on the failure threshold of the first mean, the failure threshold of the first standard deviation, the second mean, and the second standard deviation, obtain the reliability corresponding to the second preset number of cycles of vibration of the anti-loosening fastening system; the failure threshold of the first mean is determined according to the first mean and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage;

[0040] Based on the distribution of the residual pre-tightening force and the reliability, obtain the evaluation result of the lateral reliability verification of the anti-loosening fastening system.

[0041] Optionally, when the reliability evaluation analysis result includes the evaluation result of the environmental adaptability verification of the anti-loosening fastening system, obtaining the reliability evaluation analysis result based on the test information includes:

[0042] Determine the first decrease ratio of the pre-tightening force after repeated use of the anti-loosening fastening system according to the number of repeated uses of the anti-loosening fastening system;

[0043] Determine the second decrease ratio of the pre-tightening force of the anti-loosening fastening system at the temperature corresponding to the working environment temperature parameter according to the working environment temperature parameter of the anti-loosening fastening system;

[0044] Determine the third decrease ratio of the pre-tightening force of the anti-loosening fastening system in the corrosion environment corresponding to the working environment corrosion condition parameter according to the working environment corrosion condition parameter of the anti-loosening fastening system;

[0045] Determine the fourth decrease ratio of the pre-tightening force of the anti-loosening fastening system in the vibration environment corresponding to the working environment temperature parameter according to the working environment vibration parameter of the anti-loosening fastening system;

[0046] Based on the first decrease ratio, the second decrease ratio, the third decrease ratio, the fourth decrease ratio, and the preset ratio, obtain the evaluation result of the environmental adaptability verification of the anti-loosening fastening system.

[0047] Optionally, the method further includes:

[0048] When the reliability evaluation analysis result of the anti-loosening fastening system meets the preset standard, determine that the reliability of the anti-loosening fastening system meets the requirements.

[0049] Optionally, the method further includes:

[0050] When any one of the verification evaluation results in the reliability evaluation analysis result of the anti-loosening fastening system does not meet the corresponding preset standard, a prompt message is generated; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

[0051] An embodiment of the present invention further provides an anti-loosening fastening system reliability evaluation device, including:

[0052] An information acquisition module, configured to acquire test information of the anti-loosening fastening system; the test information includes: connection state information of the anti-loosening fastening system, working condition information of the anti-loosening fastening system, and key performance parameters of the anti-loosening fastener; the anti-loosening fastening system includes the anti-loosening fastener.

[0053] A processing module, configured to obtain a reliability evaluation analysis result of the anti-loosening fastening system based on the test information.

[0054] Optionally, the reliability evaluation analysis result includes at least one of the following:

[0055] The assembly quality verification evaluation result of the anti-loosening fastening system;

[0056] The pre-tightening force verification evaluation result of the anti-loosening fastening system;

[0057] The bolt joint slip force verification evaluation result of the anti-loosening fastening system;

[0058] The lateral vibration verification evaluation result of the anti-loosening fastening system;

[0059] The lateral reliability verification evaluation result of the anti-loosening fastening system;

[0060] The environmental adaptability verification evaluation result of the anti-loosening fastening system.

[0061] Optionally, the anti-loosening fastening system further includes: a bolt used in combination with the anti-loosening fastener, a nut used in combination with the anti-loosening fastener, and a connected part.

[0062] The connection state information of the anti-loosening fastening system includes: component state information of the anti-loosening fastening system and installation state information of the anti-loosening fastening system.

[0063] Among them, the component state information of the anti-loosening fastening system includes: state analysis information of the anti-loosening fastener, state analysis information of the bolt used in combination with the anti-loosening fastener, state analysis information of the nut used in combination with the anti-loosening fastener, and state analysis information of the connected part.

[0064] The installation state information includes: the design pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0065] Optionally, the working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the information on the number of reuse times of the anti-loosening fastening system;

[0066] Among them, the working environment information includes at least one of the following:

[0067] Working environment temperature parameter;

[0068] Working environment corrosion condition parameter;

[0069] Working environment vibration parameter.

[0070] Optionally, the processing module includes:

[0071] A first measurement unit for measuring the installation pre-tightening force of the anti-loosening fastening system through the bolt of the anti-loosening fastening system based on the test information to obtain a pre-tightening force measurement result;

[0072] A first processing unit for obtaining a pre-tightening force verification and evaluation result of the anti-loosening fastening system according to the pre-tightening force measurement result and the designed pre-tightening force of the anti-loosening fastening system.

[0073] Optionally, the processing module includes:

[0074] A first determination unit for determining the movement state between the connected parts when the designed lateral shear force is applied to the connected parts in the anti-loosening fastening system based on the test information;

[0075] A second processing unit for obtaining a bolt joint slip force verification and evaluation result of the anti-loosening fastening system according to the movement state.

[0076] Optionally, the processing module includes:

[0077] A second determination unit for determining the anti-loosening ability obtained by the anti-loosening fastening system through a lateral vibration test according to a preset test standard based on the test information;

[0078] A third processing unit for comparing the anti-loosening ability with the standard anti-loosening ability corresponding to the preset test standard to obtain a lateral vibration verification and evaluation result of the anti-loosening fastening system.

[0079] Optionally, the processing module includes:

[0080] A fourth processing unit for taking the mean value of the first preset number of residual pre-tightening forces generated by circulating and vibrating the anti-loosening fastening system for the first preset number of times as a reference value, and taking the first percentage of the reference value as a failure criterion;

[0081] A fifth processing unit, configured to obtain a first mean value and a first standard deviation corresponding to a first preset number of cycles of cyclic vibration of the anti-loosening fastening system according to a ratio of the first preset number of residual pre-tightening forces to an initial pre-tightening force;

[0082] A third determination unit, configured to determine a second preset number of residual pre-tightening forces generated by the anti-loosening fastening system during a second preset number of cycles of cyclic vibration;

[0083] A sixth processing unit, configured to obtain a second mean value and a second standard deviation corresponding to a second preset number of cycles of cyclic vibration of the anti-loosening fastening system according to a ratio of the second preset number of residual pre-tightening forces to an initial pre-tightening force;

[0084] A seventh processing unit, configured to obtain a distribution condition of the residual pre-tightening force corresponding to a second preset number of cycles of cyclic vibration of the anti-loosening fastening system according to the second preset number of residual pre-tightening forces and the initial pre-tightening force;

[0085] An eighth processing unit, configured to obtain a reliability corresponding to a second preset number of cycles of cyclic vibration of the anti-loosening fastening system according to a failure threshold of the first mean value, a failure threshold of the first standard deviation, the second mean value, and the second standard deviation; the failure threshold of the first mean value is determined according to the first mean value and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage;

[0086] A ninth processing unit, configured to obtain a lateral reliability verification evaluation result of the anti-loosening fastening system according to the distribution condition of the residual pre-tightening force and the reliability.

[0087] Optionally, the processing module includes:

[0088] A fourth determination unit, configured to determine a first decrease ratio of the pre-tightening force after repeated use of the anti-loosening fastening system according to the number of repeated uses of the anti-loosening fastening system;

[0089] A fifth determination unit, configured to determine a second decrease ratio of the pre-tightening force of the anti-loosening fastening system at a temperature corresponding to the working environment temperature parameter according to the working environment temperature parameter of the anti-loosening fastening system;

[0090] A sixth determination unit, configured to determine a third decrease ratio of the pre-tightening force of the anti-loosening fastening system in a corrosion environment corresponding to the working environment corrosion condition parameter according to the working environment corrosion condition parameter of the anti-loosening fastening system;

[0091] A seventh determination unit, configured to determine a fourth decrease ratio of the pre-tightening force of the anti-loosening fastening system in a vibration environment corresponding to the working environment temperature parameter according to the working environment vibration parameter of the anti-loosening fastening system;

[0092] A tenth processing unit, configured to obtain an environmental adaptability verification evaluation result of the anti-loosening fastening system according to the first decrease ratio, the second decrease ratio, the third decrease ratio, the fourth decrease ratio, and a preset ratio.

[0093] Optionally, the device further includes:

[0094] A determination module, configured to determine that the reliability of the anti-loosening fastening system meets the requirements when the reliability evaluation analysis result of the anti-loosening fastening system meets a preset standard.

[0095] Optionally, the method further includes:

[0096] An information generation module, configured to generate a prompt message when any one of the verification evaluation results in the reliability evaluation analysis result of the anti-loosening fastening system does not meet the corresponding preset standard; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

[0097] An embodiment of the present invention further provides an anti-loosening fastening system reliability evaluation device, including: a processor, a memory, and a program stored on the memory and executable on the processor, where the program, when executed by the processor, implements the steps of the anti-loosening fastening system reliability evaluation method described in any one of the above.

[0098] An embodiment of the present invention further provides a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the steps in the anti-loosening fastening system reliability evaluation method described in any one of the above are implemented.

[0099] The beneficial effects of the present invention are:

[0100] According to the solution of the present invention, by obtaining the test information of the anti-loosening fastening system and verifying and evaluating the reliability of the anti-loosening fastening system according to the test information, a reliability evaluation analysis result of the anti-loosening fastening system is obtained, and systematic and comprehensive evaluation and verification of the reliability of the anti-loosening fastening system can be realized, and problems existing in the reliability of the anti-loosening fastening system can be found. Description of the Drawings

[0101] Figure 1 One of the flowcharts showing the anti-loosening fastening system reliability evaluation method provided by the embodiment of the present invention;

[0102] Figure 2 A schematic connection diagram of the anti-loosening fastening system provided by the embodiment of the present invention;

[0103] Figure 3 Another flowchart showing the anti-loosening fastening system reliability evaluation method provided by the embodiment of the present invention;

[0104] Figure 4 Schematic structural diagram of the reliability evaluation device for the anti-loosening fastening system provided by the embodiment of the present invention;

[0105] Figure 5 Schematic structural diagram of the reliability evaluation equipment for the anti-loosening fastening system provided by the embodiment of the present invention. Specific embodiments

[0106] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0107] In view of the problem that there is no systematic reliability evaluation method for the anti-loosening fastening system in the prior art, the present invention provides a reliability evaluation method, device and equipment for the anti-loosening fastening system.

[0108] As Figure 1 shown, the embodiment of the present invention provides a reliability evaluation method for the anti-loosening fastening system, including:

[0109] Step 101: Obtain the test information of the anti-loosening fastening system; the test information includes: the connection state information of the anti-loosening fastening system, the working condition information of the anti-loosening fastening system, and the key performance parameters of the anti-loosening fasteners; the anti-loosening fastening system includes the anti-loosening fasteners.

[0110] It should be noted that the anti-loosening fastening system provided by the embodiment of the present invention includes anti-loosening fasteners, bolts, nuts and connected parts used in conjunction with the anti-loosening fasteners. Among them, the anti-loosening fasteners are also called locking elements, such as self-locking nuts, self-locking bolts, anti-loosening washers, etc.

[0111] Before verifying and evaluating the reliability of the anti-loosening fastening system, in order to ensure the rationality of the verification and evaluation, it is necessary to analyze the connection state and specific working conditions of the anti-loosening fastening system, and test the key performance parameters of the anti-loosening fasteners. Therefore, in this step, test information including the connection state information of the anti-loosening fastening system, the working condition information of the anti-loosening fastening system, and the key performance parameters of the anti-loosening fasteners is obtained.

[0112] Step 102: Based on the test information, obtain the reliability evaluation analysis result of the anti-loosening fastening system.

[0113] After obtaining the test information of the anti-loosening fastening system, in this step, according to the test information, the reliability of the anti-loosening fastening system is verified and evaluated, and the reliability evaluation analysis result of the anti-loosening fastening system is obtained, which can realize the systematic and comprehensive evaluation and verification of the reliability of the anti-loosening fastening system, and discover the problems existing in the reliability of the anti-loosening fastening system.

[0114] Optionally, the reliability evaluation analysis result includes at least one of the following:

[0115] The evaluation result of the assembly quality verification of the anti-loosening fastening system;

[0116] The evaluation result of the pre-tightening force verification of the anti-loosening fastening system;

[0117] The evaluation result of the bolt joint slip force verification of the anti-loosening fastening system;

[0118] The evaluation result of the lateral vibration verification of the anti-loosening fastening system;

[0119] The evaluation result of the lateral reliability verification of the anti-loosening fastening system;

[0120] The evaluation result of the environmental adaptability verification of the anti-loosening fastening system.

[0121] It should be noted that to ensure a systematic and comprehensive evaluation and verification of the connection reliability of the anti-loosening fastening system, therefore, the reliability analysis and evaluation result of the anti-loosening fastening system includes at least one of the following:

[0122] The evaluation result of the assembly quality verification of the anti-loosening fastening system obtained by verifying and evaluating the assembly quality of the anti-loosening fastening system;

[0123] The evaluation result of the pre-tightening force verification of the anti-loosening fastening system obtained by verifying and evaluating the pre-tightening force of the anti-loosening fastening system;

[0124] The evaluation result of the bolt joint slip force verification of the anti-loosening fastening system obtained by verifying and evaluating the bolt joint slip force of the anti-loosening fastening system;

[0125] The evaluation result of the lateral vibration verification of the anti-loosening fastening system obtained by verifying and evaluating the lateral vibration of the anti-loosening fastening system;

[0126] The evaluation result of the lateral reliability verification of the anti-loosening fastening system obtained by verifying and evaluating the lateral reliability of the anti-loosening fastening system;

[0127] The evaluation result of the environmental adaptability verification of the anti-loosening fastening system obtained by verifying and evaluating the environmental adaptability of the anti-loosening fastening system.

[0128] Preferably, the reliability evaluation analysis result includes: the evaluation result of the assembly quality verification of the anti-loosening fastening system, the evaluation result of the pre-tightening force verification of the anti-loosening fastening system, the evaluation result of the bolt joint slip force verification of the anti-loosening fastening system, the evaluation result of the lateral vibration verification of the anti-loosening fastening system, the evaluation result of the lateral reliability verification of the anti-loosening fastening system, and the evaluation result of the environmental adaptability verification of the anti-loosening fastening system.

[0129] Optionally, the anti-loosening fastening system further includes: a bolt used in conjunction with the anti-loosening fastener, a nut used in conjunction with the anti-loosening fastener, and a connected part;

[0130] The connection state information of the anti-loosening fastening system includes: the component state information of the anti-loosening fastening system and the installation state information of the anti-loosening fastening system;

[0131] Among them, the component state information of the anti-loosening fastening system includes: the state analysis information of the anti-loosening fastener, the state analysis information of the bolt used in conjunction with the anti-loosening fastener, the state analysis information of the nut used in conjunction with the anti-loosening fastener, and the state analysis information of the connected part;

[0132] The installation state information includes: the design pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0133] To verify and evaluate the reliability of the anti-loosening fastening system, it is first necessary to analyze the connection state information of the anti-loosening fastening system, that is, to comprehensively and systematically sort out and analyze the object of verification and evaluation, which can ensure the rationality and accuracy of subsequent verification and evaluation, and at the same time provide input for subsequent verification test design.

[0134] Specifically, the connection state information of the anti-loosening fastening system includes: the component state information of the anti-loosening fastening system and the installation state information of the anti-loosening fastening system. Therefore, the analysis of the connection state information of the anti-loosening fastening system mainly includes: the analysis of the connection state of the anti-loosening fastening system and the analysis of the installation state of the anti-loosening fastening system.

[0135] The analysis of the connection state of the anti-loosening fastening system includes: the analysis of the state of the anti-loosening fastener (locking element), that is, the state analysis of the selected anti-loosening fastener, and the obtained information includes the anti-loosening principle, product specifications, surface state, material, etc. of the anti-loosening fastener; the analysis of the state of the bolt (nut) used in conjunction, and the obtained information includes the product specifications, surface state, material, etc. of the bolt (nut) used in conjunction; the analysis of the state of the connected part, and the obtained information includes the material, surface treatment, plate thickness, hole edge distance of the connecting plate, etc. of the connecting plate.

[0136] It should be noted that if the thickness of the connected part is too large or the rigidity is too large, while the size of the connecting part is small or the rigidity is small, the connected part will not be clamped tightly, and even a gap will be generated between the connecting part and the connected part, losing the frictional resistance between the layers, resulting in loosening of the structural connection. Therefore, the thickness information of the connecting plate is required.

[0137] Increasing the friction to achieve the installation pre-tightening force of the anti-loosening fastener is an important factor affecting the reliability of the anti-loosening fastening system. During verification and evaluation, the installation state of the anti-loosening fastening system should be key examined. Therefore, the installation state information of the anti-loosening fastening system includes: the designed pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0138] Optionally, the working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the information on the number of repeated uses of the anti-loosening fastening system;

[0139] Among them, the working environment information includes at least one of the following:

[0140] Working environment temperature parameter;

[0141] Working environment corrosion condition parameter;

[0142] Working environment vibration parameter.

[0143] It should be noted that if the use temperature of the anti-loosening fastening system is too high or too low, it will cause the strength of the anti-loosening fastener to decrease, or the anti-loosening ability of the anti-loosening fastener to decrease due to thermal expansion and contraction, unable to meet the use requirements, resulting in loosening of the anti-loosening fastener or reduction of the sealing performance; excessive number of repeated disassembly and assembly of the anti-loosening fastener will also cause the anti-loosening performance of the anti-loosening fastener to decrease, leading to loosening failure. Therefore, analyzing the specific use environment of the anti-loosening fastening system is a key link in the design, evaluation, and verification of the anti-loosening fastening system. Analyzing the specific use environment of the anti-loosening fastening system includes: analyzing the use temperature of the anti-loosening fastening system, whether there is a corrosion situation, whether there is a vibration working condition, etc., and determining the specific environmental parameters. Specifically, clarifying the working environment information of the anti-loosening fastening system, including the working environment temperature parameter, the working environment corrosion condition parameter, and the working environment vibration parameter. Analyzing the specific use environment of the anti-loosening fastening system also includes: analyzing whether the anti-loosening fastener in the anti-loosening fastening system needs to be reused, and clarifying the number of repeated uses, that is, clarifying whether the anti-loosening fastener in the anti-loosening fastening system needs to be reused to obtain the information on the number of repeated uses.

[0144] The working condition information of the anti-loosening fastening system provides input conditions for the subsequent verification and evaluation of the anti-loosening fastening system.

[0145] Furthermore, the quality of the anti-loosening fastener (locking element) is an important factor determining its anti-loosening ability. Therefore, it is necessary to test its key performance parameters according to the requirements of the product standard to obtain the key performance parameters of the anti-loosening fastener, such as the self-locking torque of the anti-loosening fastener. If the test results of the key performance parameters are qualified, continue with the subsequent verification and evaluation of the anti-loosening fastening system. If the test results of the key performance parameters are unqualified, stop the verification and evaluation of the anti-loosening fastening system.

[0146] The specific process of verifying and evaluating the reliability of the anti-loosening fastening system will be described in detail below.

[0147] The main reason for the loosening of the anti-loosening fastening system is that the quality of the anti-loosening fasteners (locking elements) in the anti-loosening fastening system fails to meet the design requirements or there are potential quality hazards. Therefore, it is necessary to verify and evaluate the assembly quality of the anti-loosening fastening system. The verification indicators mainly include the inspection of the installation quality. The inspection of the assembly quality of the anti-loosening fastening system is mainly carried out by the staff to obtain the verification and evaluation results of the assembly quality of the anti-loosening fastening system.

[0148] Optionally, when the reliability evaluation analysis result includes the verification and evaluation result of the pre-tightening force of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes:

[0149] Based on the test information, measure the installation pre-tightening force of the anti-loosening fastening system through the bolts of the anti-loosening fastening system to obtain the pre-tightening force measurement result;

[0150] According to the pre-tightening force measurement result and the design pre-tightening force of the anti-loosening fastening system, obtain the verification and evaluation result of the pre-tightening force of the anti-loosening fastening system.

[0151] Too small pre-tightening force of the anti-loosening fasteners in the anti-loosening fastening system is also the main reason for the loosening of the anti-loosening fastening system. Therefore, it is necessary to verify and evaluate the design pre-tightening force, that is, to measure the pre-tightening force to obtain the verification and evaluation result of the pre-tightening force of the anti-loosening fastening system. The specific process is as follows: (1) Intelligently process the bolts in the anti-loosening fastening system, which can be processed by strain type, fiber optic type, ultrasonic, etc. and calibrated; (2) Install according to the installation process document of the product in the anti-loosening fastening system. After installation, check according to the installation requirements to judge whether it meets the installation requirements, that is, check the assembly quality of the anti-loosening fastening system to judge whether it meets the requirements; (3) Use intelligent test equipment to measure the installation pre-tightening force of the anti-loosening fasteners in the installed anti-loosening fastening system to obtain the pre-tightening force measurement result. If the pre-tightening force measurement result meets the design requirements, that is, meets the design pre-tightening force, continue with the subsequent verification and evaluation work. If the pre-tightening force measurement result does not meet the design requirements, that is, does not meet the design pre-tightening force, feedback to the design unit, analyze the reasons, and rectify the problems. After passing the rectification, continue with the subsequent verification and evaluation work.

[0152] Optionally, when the reliability evaluation analysis result includes the verification and evaluation result of the bolt joint slip force of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes:

[0153] Based on the test information, determine the movement state between the connected parts when the designed lateral shear force is applied to the connected parts in the anti-loosening fastening system;

[0154] According to the movement state, obtain the verification and evaluation result of the slip force of the bolt joint of the anti-loosening fastening system.

[0155] Verifying and evaluating the slip force of the bolt joint is mainly to examine whether the connection joint of the anti-loosening fastening system can resist the designed slip force when subjected to a lateral force. The requirements for the verification and assessment test are as follows:

[0156] (1) Specimen requirements: The anti-loosening fasteners and the connected parts should be processed from the actual materials with threaded connections to ensure that the test friction state is the same as the actual use state, and the thickness is the same as the actual use thickness;

[0157] (2) Test method: Connect the test piece in the connection mode as shown in Figure 2 to make it reach a specific initial pre-tightening force. When the lateral shear force is increased to a certain level, it will trigger the sliding between the clamping parts and increase the displacement amplitude. Measure the shear force value when the joint fails, that is, measure the slip force;

[0158] The specific test steps are as follows:

[0159] Assemble the specimen and the test fixture in the manner as shown in Figure 2 , and then tighten the threaded fastener with the specified installation torque (apply the clamping load); to simulate the actual use of the product, some anti-loosening fasteners should be repeatedly disassembled and installed on the test fixture bushing to the specified number of times according to the requirements of the technical conditions before the test can be carried out; increase the lateral shear force until the clamping parts slide, then the test stops. Lines should be drawn or other marks should be made on the product to determine whether there is relative sliding, and record the slip force at this time.

[0160] (3) Evaluation of test results: If the designed working lateral shear force on the bolt joint is F1 (this designed working lateral shear force F1 includes the safety factor), during the test, apply the lateral shear force F1. If there is no movement between the clamping components, the bolt joint has passed the test. If there is movement between the clamping components, the anti-loosening fastening system does not meet the design requirements and needs to be adjusted.

[0161] Optionally, when the reliability evaluation analysis result includes the verification and evaluation result of the lateral vibration of the anti-loosening fastening system, the obtaining of the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes:

[0162] Based on the test information, determine the anti-loosening ability of the anti-loosening fastening system obtained by performing a lateral vibration test according to a preset test standard;

[0163] Compare with the standard anti-loosening ability corresponding to the anti-loosening ability and the preset test standard to obtain the transverse vibration verification evaluation result of the anti-loosening fastening system.

[0164] Through research, it can be known that the transverse load is the main factor causing the loosening of the anti-loosening fastening system. Therefore, the transverse vibration test is an important link to verify the reliability of the anti-loosening fastening system. In this embodiment, the preset test standard is ISO16130 "Aerospace series–Dynamic testing of the locking behavior of bolted connections under transverse loading condition (vibrating test)". That is, the test piece is subjected to a transverse vibration test in accordance with the standard ISO16130 "Aerospace series–Dynamic testing of the locking behavior of bolted connections under transverse loading condition (vibrating test)" to obtain the transverse vibration verification evaluation result of the anti-loosening fastening system, and the anti-loosening ability is evaluated in accordance with the standard requirements (standard anti-loosening ability). If the test result meets the design requirements, the subsequent verification evaluation is continued. If it does not meet the design requirements, the type of anti-loosening fastener is replaced.

[0165] Optionally, when the reliability evaluation analysis result includes the transverse reliability verification evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes:

[0166] Take the mean value of the first preset number of residual pre-tightening forces generated by the cyclic vibration of the anti-loosening fastening system for the first preset number of times as the reference value, and take the first percentage of the reference value as the failure criterion;

[0167] According to the ratio of the first preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the first mean value and the first standard deviation corresponding to the first preset number of cyclic vibrations of the anti-loosening fastening system;

[0168] Determine the second preset number of residual pre-tightening forces generated by the cyclic vibration of the anti-loosening fastening system for the second preset number of times;

[0169] According to the ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the second mean value and the second standard deviation corresponding to the second preset number of cyclic vibrations of the anti-loosening fastening system;

[0170] Based on the residual pre-tightening force and the initial pre-tightening force of the second preset quantity, obtain the distribution status of the residual pre-tightening force corresponding to the second preset number of cycles of vibration of the anti-loosening fastening system;

[0171] Based on the failure threshold of the first mean, the failure threshold of the first standard deviation, the second mean, and the second standard deviation, obtain the reliability corresponding to the second preset number of cycles of vibration of the anti-loosening fastening system; the failure threshold of the first mean is determined according to the first mean and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage;

[0172] Based on the distribution status of the residual pre-tightening force and the reliability, obtain the evaluation result of the lateral reliability verification of the anti-loosening fastening system.

[0173] By analyzing the lateral reliability of the anti-loosening fastening system, the lateral reliability of the anti-loosening fastener and the distribution status of the residual pre-tightening force can be obtained, that is, the reliability evaluation analysis result of the anti-loosening fastening system.

[0174] The loosening process curve of the anti-loosening fastener is mainly divided into three stages. Among them, the first stage and the second stage are important stages for evaluating the anti-loosening effect of the anti-loosening fastener. Therefore, in this embodiment, the analysis of the lateral reliability of the anti-loosening fastening system is mainly to analyze the data of the loosening process curve. The specific analysis process is as follows:

[0175] Select the first preset quantity according to the design requirements, take the mean value of the residual pre-tightening force generated by cycling vibration (lateral vibration) for the first preset number of times (N1) as the reference value, and determine a% of this reference value as the failure criterion, that is, take the first percentage (a%) of the residual pre-tightening force decaying to the reference value as the failure criterion. According to the ratio of the residual pre-tightening force to the initial pre-tightening force of each sample in the test group with N1 cycles of vibration (the number of samples is the first preset quantity), obtain the first mean μ1 and the first standard deviation σ1 corresponding to each sample in the test group with N1 cycles of vibration.

[0176] Determine the second preset quantity of residual pre-tightening force generated by the anti-loosening fastening system during cycling vibration (lateral vibration) for the second preset number of times (N2), and calculate the second mean μ2 and the second standard deviation σ2 corresponding to each sample in the test group with N2 cycles of vibration according to the ratio of the residual pre-tightening force to the initial pre-tightening force of each sample in the test group with N2 cycles of vibration (the number of samples is the second preset quantity), and determine the distribution status of the residual pre-tightening force corresponding to the second preset number of cycles of vibration according to the ratio of the residual pre-tightening force to the initial pre-tightening force, for example, whether it conforms to the normal distribution.

[0177] According to the failure criterion, calculate the first mean value μ1 and the first standard deviation σ1 corresponding to each sample in the test group of the number of cyclic vibrations N1, and obtain the failure threshold μ3 of the first mean value = μ1 × a%, and the failure threshold σ3 of the first standard value = σ1 × a%.

[0178] Calculate the reliability index according to the following formula:

[0179]

[0180] where μ y is the second mean value μ2, σ y is the second standard deviation σ2, μ x is the failure threshold μ3 of the first mean value, σ x is the failure threshold σ3 of the first standard deviation.

[0181] According to the calculated reliability index, give the reliability of the test group of the number of cyclic vibrations N2 by looking up the table. Specifically, first look up the table for the distribution of the reliability index data. If the reliability index data conforms to the normal distribution, look up the normal distribution table. If the reliability index data conforms to the T distribution, look up the T distribution table. In this embodiment, the result of the test is that the reliability index conforms to the normal distribution.

[0182] Determine whether the requirements are met according to the reliability. If the requirements are not met, modify the design of the anti-loosening fastening system.

[0183] The following takes the calculation of the lateral vibration test result of a certain product as an example to give a specific example:

[0184] Taking the average value of the residual preload generated by 300 cyclic vibrations (the first preset number) as the reference value, and taking the residual preload decaying to 80% of the reference value (the first percentage) as the failure criterion, calculate the reliability after 1500 (the second preset number) lateral cyclic vibrations.

[0185] The percentages of the residual preload generated by the product after 300 cyclic vibrations to the initial preload are: 54%, 51%, 58%, 54%, 55%, 55%, 59%, 50%, 57%, 57% respectively. After inspection, the above percentages of the residual preload to the initial preload conform to the normal distribution. It can be calculated that the first mean value μ = 55% and the first standard deviation σ = 0.028 corresponding to 300 cyclic vibrations.

[0186] The percentages of the residual pre - tightening force generated after 1500 - cycle vibration to the initial pre - tightening force are successively: 49%, 45%, 50%, 46%, 49%, 47%, 52%, 43%, 49%, 50%. After inspection, the percentages of the above - mentioned residual pre - tightening force to the initial pre - tightening force conform to the normal distribution. It can be calculated that the second mean value μ corresponding to 1500 - cycle vibration is 48%, and the second standard deviation σ is 0.028.

[0187] In the above formula for calculating the reliability index, the second mean value and the second standard deviation of the percentage of the residual pre - tightening force generated by 1500 - cycle lateral vibration to the initial pre - tightening force are: μ y = 48%, σ y = 0.028.

[0188] According to the first mean value, the first standard - deviation calculation, and the failure criterion, the failure threshold of the mean value of the percentage of the residual pre - tightening force and the failure threshold of the standard deviation are: μ x = 0.8×55%, σ x = 0.8×0.028.

[0189] According to the following formula, calculate the reliability index:

[0190]

[0191] By looking up the normal - distribution table, it can be known that the reliability at 1500 - cycle lateral - vibration period:

[0192] The reliability of this number of vibration times meets the design requirements.

[0193] Optionally, when the reliability evaluation and analysis result includes the environmental adaptability verification and evaluation result of the anti - loosening fastening system, obtaining the reliability evaluation and analysis result of the anti - loosening fastening system based on the test information includes:

[0194] Determine the first reduction ratio of the pre - tightening force after repeated use of the anti - loosening fastening system according to the number of repeated uses of the anti - loosening fastening system;

[0195] Determine the second reduction ratio of the pre - tightening force of the anti - loosening fastening system at the temperature corresponding to the working - environment temperature parameter according to the working - environment temperature parameter of the anti - loosening fastening system;

[0196] Determine the third reduction ratio of the pre - tightening force of the anti - loosening fastening system in the corrosion environment corresponding to the working - environment corrosion - condition parameter according to the working - environment corrosion - condition parameter of the anti - loosening fastening system;

[0197] Determine a fourth decrease ratio of the pre-tightening force of the anti-loosening fastening system in the vibration environment corresponding to the operating environment temperature parameter according to the vibration parameter of the operating environment of the anti-loosening fastening system;

[0198] Obtain the environmental adaptability verification evaluation result of the anti-loosening fastening system according to the first decrease ratio, the second decrease ratio, the third decrease ratio, the fourth decrease ratio and the preset ratio.

[0199] Verify and evaluate the reliability of the anti-loosening fastening system under the actual use environment, mainly carry out verification tests on the reusability, high and low temperature environment adaptability, corrosion environment adaptability and vibration environment (actual vibration environment). The specific requirements are as follows:

[0200] (1) Reusability verification: If the anti-loosening fastening system has the requirement of reusability, screw the anti-loosening fastening system in and out according to a fixed number of times (the number of reuse times), and use intelligent detection technology to measure the pre-tightening force before and after the repeated screwing test, and analyze the decrease ratio of the pre-tightening force (the first decrease ratio). If the pre-tightening force after the decrease meets the anti-loosening requirement, it passes the verification;

[0201] (2) Environmental temperature adaptability verification: If the operating temperature of the anti-loosening fastening system involves high and low temperature environments, conduct tests according to the actual operating environment parameters (operating environment temperature parameters), and use intelligent detection technology to measure the magnitude of the pre-tightening force before and after the test, and analyze the decrease ratio of the pre-tightening force (the second decrease ratio). If the pre-tightening force after the decrease can still meet the anti-loosening requirement, it passes the verification;

[0202] (3) Corrosion environment adaptability verification: If the use environment of the anti-loosening fastening system involves a corrosion environment, conduct tests according to the actual corrosion environment parameters (operating environment corrosion condition parameters), and use intelligent detection technology to measure the magnitude of the pre-tightening force before and after the test, and analyze the decrease ratio of the pre-tightening force (the third decrease ratio). If the pre-tightening force after the decrease can still meet the anti-loosening requirement, it passes the verification;

[0203] (4) Vibration environment (actual vibration environment) adaptability verification: Conduct a vibration test according to the actual use environment of the anti-loosening fastening system, and use intelligent detection technology to measure the magnitude of the pre-tightening force before and after the test, and analyze the decrease ratio of the pre-tightening force (the fourth decrease ratio). If the pre-tightening force after the decrease can still meet the anti-loosening requirement, it passes the verification.

[0204] Optionally, the method further includes:

[0205] When the reliability evaluation and analysis result of the anti-loosening fastening system meets the preset standard, determine that the reliability of the anti-loosening fastening system meets the requirements.

[0206] It should be noted that the reliability evaluation and analysis results of the anti-loosening fastening system meet the preset standards, specifically including: the assembly quality verification evaluation results of the anti-loosening fastening system, the pre-tightening force verification evaluation results of the anti-loosening fastening system, the bolt joint slip force verification evaluation results of the anti-loosening fastening system, the lateral vibration verification evaluation results of the anti-loosening fastening system, the lateral reliability verification evaluation results of the anti-loosening fastening system, and the environmental adaptability verification evaluation results of the anti-loosening fastening system all meet the corresponding preset requirements.

[0207] When the above verification evaluation results all meet the corresponding preset requirements, the reliability of the anti-loosening fastening system is determined, that is, the anti-loosening ability meets the requirements.

[0208] Optionally, the method further includes:

[0209] When any one of the verification evaluation results in the reliability evaluation and analysis results of the anti-loosening fastening system does not meet the corresponding preset standard, a prompt message is generated; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

[0210] When any one or more of the assembly quality verification evaluation results of the anti-loosening fastening system, the pre-tightening force verification evaluation results of the anti-loosening fastening system, the bolt joint slip force verification evaluation results of the anti-loosening fastening system, the lateral vibration verification evaluation results of the anti-loosening fastening system, the lateral reliability verification evaluation results of the anti-loosening fastening system, and the environmental adaptability verification evaluation results of the anti-loosening fastening system do not meet the corresponding preset requirements, the reliability of the anti-loosening fastening system is determined, that is, the anti-loosening ability does not meet the requirements, and a prompt message is generated to enable the designer to change the design of the anti-loosening fastening system.

[0211] The following combines Figure 3 , and specifically describes the reliability evaluation method of the anti-loosening fastening system.

[0212] Determine the connection status of the loosening prevention fastening system, including the status analysis of each component of the loosening prevention fastening system and the installation status of the loosening prevention fastening system. Among them, the status analysis of each component of the loosening prevention fastening system includes the status analysis of the loosening prevention fastener (or locking element), the status analysis of the mating bolt (or nut), and the status analysis of the connected part. The installation status of the loosening prevention fastening system mainly includes the design pre-tightening force, the installation torque loading method, etc.; clarify the specific working conditions of the loosening prevention fastening system, including the use environment and the repeated use conditions; carry out the key performance parameter test of the loosening prevention fastener, obtain the key performance parameters of the loosening prevention fastener (the test results of the loosening prevention fastener), and judge whether the test results of the loosening prevention fastener meet the standard requirements. If not, it is considered that the product is unqualified and needs to resubmit the product to be evaluated. If it meets the requirements, verify and evaluate the assembly quality and design pre-tightening force of the loosening prevention fastening system. The verification and evaluation of the assembly quality and design pre-tightening force of the loosening prevention fastening system include the installation quality inspection and pre-tightening force test of the loosening prevention fastening system. If the result of the pre-tightening force test does not meet the design requirements, feedback to the designer and stop the subsequent verification and evaluation. If the results of the installation quality inspection and pre-tightening force test meet the design requirements, test and verify the slip force of the connection joint of the loosening prevention fastening system, specifically including carrying out the slip force test of the connection joint to obtain the slip force test value, and judge whether the slip force test value meets the design requirements. If the slip force test value does not meet the design requirements, it is considered that the joint design is unreasonable, feedback to the designer and stop the subsequent verification and evaluation. If the slip force test value meets the design requirements, carry out the lateral vibration test of the loosening prevention fastening system to determine whether the residual pre-tightening force meets the design requirements under the specified number of vibration cycles. If the residual pre-tightening force under the specified number of vibration cycles does not meet the design requirements, it is considered that the loosening prevention ability does not meet the requirements, feedback to the designer and stop the subsequent verification and evaluation. If the residual pre-tightening force under the specified number of vibration cycles meets the design requirements, verify the lateral reliability of the loosening prevention fastening system to determine whether the reliability meets the design requirements under the specified number of cycles. If the reliability under the specified number of cycles does not meet the design requirements, it is considered that the loosening prevention ability does not meet the requirements, feedback to the designer and stop the subsequent verification and evaluation. If the reliability under the specified number of cycles meets the design requirements, verify and evaluate the environmental adaptability of the loosening prevention fastening system, including the repeated use test verification, the temperature environment adaptability test verification, the corrosion environment adaptability test verification, and the vibration environment (actual vibration environment) test adaptability verification. After carrying out the above test verifications, if the pre-tightening force after the test does not meet the design requirements, the loosening prevention fastening system does not meet the actual use conditions, feedback to the designer. If the pre-tightening force after the test meets the design requirements, the performance and reliability of the loosening prevention fastening system meet the design requirements.

[0213] The reliability evaluation method for the anti-loosening fastening system provided by the embodiments of the present invention can systematically and comprehensively evaluate and verify the anti-loosening fastening system, discover the problems existing in the anti-loosening fastening system, prevent risks, and guide the structural design, thereby improving the connection reliability of the anti-loosening fastening system.

[0214] As Figure 4 shown, the embodiments of the present invention further provide an anti-loosening fastening system reliability evaluation device, including:

[0215] An information acquisition module 401, configured to acquire the test information of the anti-loosening fastening system; the test information includes: the connection state information of the anti-loosening fastening system, the working condition information of the anti-loosening fastening system, and the key performance parameters of the anti-loosening fasteners; the anti-loosening fastening system includes the anti-loosening fasteners;

[0216] A processing module 402, configured to obtain the reliability evaluation analysis result of the anti-loosening fastening system based on the test information.

[0217] In the implementation of the present invention, by acquiring the test information of the anti-loosening fastening system and verifying and evaluating the reliability of the anti-loosening fastening system according to the test information, and obtaining the reliability evaluation analysis result of the anti-loosening fastening system, it is possible to systematically and comprehensively evaluate and verify the reliability of the anti-loosening fastening system and discover the problems existing in the anti-loosening fastening system in terms of reliability.

[0218] Optionally, the reliability evaluation analysis result includes at least one of the following:

[0219] The assembly quality verification and evaluation result of the anti-loosening fastening system;

[0220] The pre-tightening force verification and evaluation result of the anti-loosening fastening system;

[0221] The bolt joint slip force verification and evaluation result of the anti-loosening fastening system;

[0222] The lateral vibration verification and evaluation result of the anti-loosening fastening system;

[0223] The lateral reliability verification and evaluation result of the anti-loosening fastening system;

[0224] The environmental adaptability verification and evaluation result of the anti-loosening fastening system.

[0225] Optionally, the anti-loosening fastening system further includes: a bolt used in combination with the anti-loosening fastener, a nut used in combination with the anti-loosening fastener, and a connected part;

[0226] The connection state information of the anti-loosening fastening system includes: the component state information of the anti-loosening fastening system and the installation state information of the anti-loosening fastening system;

[0227] Among them, the component status information of the anti-loosening fastening system includes: the status analysis information of the anti-loosening fastener, the status analysis information of the bolt used in combination with the anti-loosening fastener, the status analysis information of the nut used in combination with the anti-loosening fastener, and the status analysis information of the connected part;

[0228] The installation status information includes: the design pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0229] Optionally, the working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the information on the number of repeated uses of the anti-loosening fastening system;

[0230] Among them, the working environment information includes at least one of the following:

[0231] Working environment temperature parameter;

[0232] Working environment corrosion condition parameter;

[0233] Working environment vibration parameter.

[0234] Optionally, the processing module 402 includes:

[0235] A first measurement unit, configured to measure the installation pre-tightening force of the anti-loosening fastening system through the bolt of the anti-loosening fastening system based on the test information, and obtain a pre-tightening force measurement result;

[0236] A first processing unit, configured to obtain a pre-tightening force verification evaluation result of the anti-loosening fastening system according to the pre-tightening force measurement result and the design pre-tightening force of the anti-loosening fastening system.

[0237] Optionally, the processing module 402 includes:

[0238] A first determination unit, configured to determine the movement state between the connected parts when the connected parts in the anti-loosening fastening system are applied with a designed lateral shear force based on the test information;

[0239] A second processing unit, configured to obtain a bolt joint slip force verification evaluation result of the anti-loosening fastening system according to the movement state.

[0240] Optionally, the processing module 402 includes:

[0241] A second determination unit, configured to determine the anti-loosening ability obtained by the anti-loosening fastening system through a lateral vibration test according to a preset test standard based on the test information;

[0242] A third processing unit, configured to compare the anti-loosening ability with a standard anti-loosening ability corresponding to the preset test standard, so as to obtain a transverse vibration verification evaluation result of the anti-loosening fastening system.

[0243] Optionally, the processing module 402 includes:

[0244] A fourth processing unit, configured to use the average value of a first preset number of residual pre-tightening forces generated by subjecting the anti-loosening fastening system to cyclic vibration for a first preset number of times as a reference value, and use a first percentage of the reference value as a failure criterion;

[0245] A fifth processing unit, configured to obtain a first average value and a first standard deviation corresponding to the anti-loosening fastening system subjected to cyclic vibration for the first preset number of times according to a ratio of the first preset number of residual pre-tightening forces to an initial pre-tightening force;

[0246] A third determination unit, configured to determine a second preset number of residual pre-tightening forces generated by subjecting the anti-loosening fastening system to cyclic vibration for a second preset number of times;

[0247] A sixth processing unit, configured to obtain a second average value and a second standard deviation corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times according to a ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force;

[0248] A seventh processing unit, configured to obtain a residual pre-tightening force distribution condition corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times according to the second preset number of residual pre-tightening forces and the initial pre-tightening force;

[0249] An eighth processing unit, configured to obtain a reliability corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times according to a failure threshold of the first average value, a failure threshold of the first standard deviation, the second average value, and the second standard deviation; the failure threshold of the first average value is determined according to the first average value and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage;

[0250] A ninth processing unit, configured to obtain a transverse reliability verification evaluation result of the anti-loosening fastening system according to the residual pre-tightening force distribution condition and the reliability.

[0251] Optionally, the processing module 402 includes:

[0252] A fourth determination unit, configured to determine a first decrease ratio of the pre-tightening force after repeated use of the anti-loosening fastening system according to the number of repeated uses of the anti-loosening fastening system;

[0253] A fifth determination unit, configured to determine a second decrease ratio of the pre-tightening force of the anti-loosening fastening system at a temperature corresponding to the working environment temperature parameter of the anti-loosening fastening system;

[0254] A sixth determination unit, configured to determine a third decrease ratio of the pre-tightening force of the anti-loosening fastening system in a corrosion environment corresponding to the working environment corrosion condition parameter of the anti-loosening fastening system;

[0255] A seventh determination unit, configured to determine a fourth decrease ratio of the pre-tightening force of the anti-loosening fastening system in a vibration environment corresponding to the working environment temperature parameter of the anti-loosening fastening system according to the working environment vibration parameter of the anti-loosening fastening system;

[0256] A tenth processing unit, configured to obtain an environmental adaptability verification evaluation result of the anti-loosening fastening system according to the first decrease ratio, the second decrease ratio, the third decrease ratio, the fourth decrease ratio, and a preset ratio.

[0257] Optionally, the device further includes:

[0258] A determination module, configured to determine that the reliability of the anti-loosening fastening system meets the requirements when the reliability evaluation analysis result of the anti-loosening fastening system meets a preset standard.

[0259] Optionally, the method further includes:

[0260] An information generation module, configured to generate a prompt message when any verification evaluation result in the reliability evaluation analysis result of the anti-loosening fastening system does not meet a corresponding preset standard; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

[0261] It should be noted that the anti-loosening fastening system reliability evaluation device provided in the embodiments of the present invention is a device capable of executing the above anti-loosening fastening system reliability evaluation method. All embodiments of the above anti-loosening fastening system reliability evaluation method are applicable to this device and can achieve the same or similar technical effects.

[0262] As Figure 5 shown, an embodiment of the present invention further provides a receiving end device, including: a processor 500; and a memory 510 connected to the processor 500 through a bus interface, where the memory 510 is used to store programs and data used by the processor 500 when executing operations, and the processor 500 calls and executes the programs and data stored in the memory 510.

[0263] Among them, the receiving-end device further includes a transceiver 520, which is connected to the bus interface and is used for receiving and sending data under the control of the processor 500;

[0264] Specifically, the processor 500 is used for:

[0265] Obtaining the test information of the anti-loosening fastening system; the test information includes: the connection state information of the anti-loosening fastening system, the working condition information of the anti-loosening fastening system, and the key performance parameters of the anti-loosening fastener; the anti-loosening fastening system includes the anti-loosening fastener; based on the test information, obtaining the reliability evaluation and analysis result of the anti-loosening fastening system.

[0266] Optionally, the reliability evaluation and analysis result includes at least one of the following:

[0267] The assembly quality verification and evaluation result of the anti-loosening fastening system;

[0268] The pre-tightening force verification and evaluation result of the anti-loosening fastening system;

[0269] The bolt joint slip force verification and evaluation result of the anti-loosening fastening system;

[0270] The lateral vibration verification and evaluation result of the anti-loosening fastening system;

[0271] The lateral reliability verification and evaluation result of the anti-loosening fastening system;

[0272] The environmental adaptability verification and evaluation result of the anti-loosening fastening system.

[0273] Optionally, the anti-loosening fastening system further includes: a bolt used in combination with the anti-loosening fastener, a nut used in combination with the anti-loosening fastener, and a connected part;

[0274] The connection state information of the anti-loosening fastening system includes: the component state information of the anti-loosening fastening system and the installation state information of the anti-loosening fastening system;

[0275] Among them, the component state information of the anti-loosening fastening system includes: the state analysis information of the anti-loosening fastener, the state analysis information of the bolt used in combination with the anti-loosening fastener, the state analysis information of the nut used in combination with the anti-loosening fastener, and the state analysis information of the connected part;

[0276] The installation state information includes: the design pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

[0277] Optionally, the working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the reuse times information of the anti-loosening fastening system;

[0278] Among them, the working environment information includes at least one of the following:

[0279] Working environment temperature parameter;

[0280] Working environment corrosion condition parameter;

[0281] Working environment vibration parameter.

[0282] Optionally, when the reliability evaluation analysis result includes the pre-tightening force verification evaluation result of the anti-loosening fastening system, the processor 500 is specifically configured to:

[0283] Based on the test information, measure the installation pre-tightening force of the anti-loosening fastening system through the bolts of the anti-loosening fastening system to obtain a pre-tightening force measurement result;

[0284] According to the pre-tightening force measurement result and the designed pre-tightening force of the anti-loosening fastening system, obtain the pre-tightening force verification evaluation result of the anti-loosening fastening system.

[0285] Optionally, when the reliability evaluation analysis result includes the bolt joint slip force verification evaluation result of the anti-loosening fastening system, the processor 500 is specifically configured to:

[0286] Based on the test information, determine the movement state between the connected parts when the designed lateral shear force is applied to the connected parts in the anti-loosening fastening system;

[0287] According to the movement state, obtain the bolt joint slip force verification evaluation result of the anti-loosening fastening system.

[0288] Optionally, when the reliability evaluation analysis result includes the lateral vibration verification evaluation result of the anti-loosening fastening system, the processor 500 is specifically configured to:

[0289] Based on the test information, determine the anti-loosening ability obtained by the anti-loosening fastening system when performing a lateral vibration test according to a preset test standard;

[0290] Compare the anti-loosening ability with the standard anti-loosening ability corresponding to the preset test standard to obtain the lateral vibration verification evaluation result of the anti-loosening fastening system.

[0291] Optionally, when the reliability evaluation analysis result includes the lateral reliability verification evaluation result of the anti-loosening fastening system, the processor 500 is specifically configured to:

[0292] Take the mean value of the first preset number of residual pre-tightening forces generated by subjecting the anti-loosening fastening system to cyclic vibration for the first preset number of times as the reference value, and take the first percentage of the reference value as the failure criterion;

[0293] According to the ratio of the first preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the first mean value and the first standard deviation corresponding to the anti-loosening fastening system subjected to cyclic vibration for the first preset number of times;

[0294] Determine the second preset number of residual pre-tightening forces generated by subjecting the anti-loosening fastening system to cyclic vibration for the second preset number of times;

[0295] According to the ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force, obtain the second mean value and the second standard deviation corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times;

[0296] According to the second preset number of residual pre-tightening forces and the initial pre-tightening force, obtain the distribution condition of the residual pre-tightening force corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times;

[0297] According to the failure threshold of the first mean value, the failure threshold of the first standard deviation, the second mean value and the second standard deviation, obtain the reliability corresponding to the anti-loosening fastening system subjected to cyclic vibration for the second preset number of times; the failure threshold of the first mean value is determined according to the first mean value and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage;

[0298] According to the distribution condition of the residual pre-tightening force and the reliability, obtain the evaluation result of the lateral reliability verification of the anti-loosening fastening system.

[0299] Optionally, when the reliability evaluation analysis result includes the environmental adaptability verification evaluation result of the anti-loosening fastening system, the processor 500 is specifically configured to:

[0300] According to the number of repeated uses of the anti-loosening fastening system, determine the first decrease ratio of the pre-tightening force after repeated use of the anti-loosening fastening system;

[0301] According to the working environment temperature parameter of the anti-loosening fastening system, determine the second decrease ratio of the pre-tightening force of the anti-loosening fastening system at the temperature corresponding to the working environment temperature parameter;

[0302] According to the working environment corrosion condition parameter of the anti-loosening fastening system, determine the third decrease ratio of the pre-tightening force of the anti-loosening fastening system in the corrosion environment corresponding to the working environment corrosion condition parameter;

[0303] Determine a fourth decreasing ratio of the pre-tightening force of the anti-loosening fastening system in the vibration environment corresponding to the operating environment temperature parameter according to the vibration parameter of the operating environment of the anti-loosening fastening system;

[0304] Obtain an environmental adaptability verification and evaluation result of the anti-loosening fastening system according to the first decreasing ratio, the second decreasing ratio, the third decreasing ratio, the fourth decreasing ratio, and a preset ratio.

[0305] Optionally, the processor 500 is further configured to:

[0306] Determine that the reliability of the anti-loosening fastening system meets the requirements when the reliability evaluation and analysis result of the anti-loosening fastening system meets a preset standard.

[0307] Optionally, the processor 500 is further configured to:

[0308] Generate a prompt message when any one of the verification and evaluation results in the reliability evaluation and analysis result of the anti-loosening fastening system does not meet the corresponding preset standard; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

[0309] Wherein, in Figure 5 The bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by the processor 500 and a memory represented by the memory 510 are linked together. The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be further described herein. The bus interface provides the user interface 530. The transceiver 520 may be a plurality of components, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 510 can store the data used by the processor 500 when executing operations.

[0310] In addition, a specific embodiment of the present invention further provides a readable storage medium, on which a computer program is stored, wherein when the program is executed by a processor, the steps in the anti-loosening fastening system reliability evaluation method described in any one of the above are implemented.

[0311] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principle described in the present invention, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. A method for evaluating the reliability of a loosening prevention fastening system, characterized in that, Including: Obtaining test information of the anti-loosening fastening system; The test information includes: connection state information of the anti-loosening fastening system, working condition information of the anti-loosening fastening system, and key performance parameters of the anti-loosening fastener; the anti-loosening fastening system includes the anti-loosening fastener; Based on the test information, obtaining a reliability evaluation analysis result of the anti-loosening fastening system; Wherein, when the reliability evaluation analysis result includes a lateral reliability verification evaluation result of the anti-loosening fastening system, the obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes: Taking the mean value of the first preset number of residual pre-tightening forces generated by the anti-loosening fastening system vibrating cyclically for the first preset number of times as a reference value, and taking the first percentage of the reference value as a failure criterion; According to the ratio of the first preset number of residual pre-tightening forces to the initial pre-tightening force, obtaining a first mean value and a first standard deviation corresponding to the anti-loosening fastening system vibrating cyclically for the first preset number of times; Determining the second preset number of residual pre-tightening forces generated by the anti-loosening fastening system vibrating cyclically for the second preset number of times; According to the ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force, obtaining a second mean value and a second standard deviation corresponding to the anti-loosening fastening system vibrating cyclically for the second preset number of times; According to the second preset number of residual pre-tightening forces and the initial pre-tightening force, obtaining the residual pre-tightening force distribution condition corresponding to the anti-loosening fastening system vibrating cyclically for the second preset number of times; According to the failure threshold of the first mean value, the failure threshold of the first standard deviation, the second mean value and the second standard deviation, obtaining the reliability corresponding to the anti-loosening fastening system vibrating cyclically for the second preset number of times; the failure threshold of the first mean value is determined according to the first mean value and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage; According to the residual pre-tightening force distribution condition and the reliability, obtaining the lateral reliability verification evaluation result of the anti-loosening fastening system.

2. The reliability evaluation method of the anti-loosening fastening system according to claim 1, characterized in that, The reliability evaluation analysis result includes at least one of the following: The assembly quality verification evaluation result of the anti-loosening fastening system; The pre-tightening force verification evaluation result of the anti-loosening fastening system; The bolt joint slip force verification evaluation result of the anti-loosening fastening system; The lateral vibration verification evaluation result of the anti-loosening fastening system; The environmental adaptability verification evaluation result of the anti-loosening fastening system.

3. The reliability evaluation method of the anti-loosening fastening system according to claim 1, wherein The anti-loosening fastening system further includes: a bolt used in combination with the anti-loosening fastener, a nut used in combination with the anti-loosening fastener, and a connected part; The connection state information of the anti-loosening fastening system includes: component state information of the anti-loosening fastening system and installation state information of the anti-loosening fastening system; Wherein, the component state information of the anti-loosening fastening system includes: state analysis information of the anti-loosening fastener, state analysis information of the bolt used in combination with the anti-loosening fastener, state analysis information of the nut used in combination with the anti-loosening fastener, and state analysis information of the connected part; The installation status information includes: the designed pre-tightening force of the anti-loosening fastening system and the loading method of the installation torque.

4. The reliability evaluation method of the anti-loosening fastening system according to claim 1, characterized in that The working condition information of the anti-loosening fastening system includes: the working environment information of the anti-loosening fastening system and the information on the number of repeated uses of the anti-loosening fastening system; Wherein, the working environment information includes at least one of the following: Working environment temperature parameter; Working environment corrosion condition parameter; Working environment vibration parameter.

5. The reliability evaluation method of the anti-loosening fastening system according to claim 1, characterized in that When the reliability evaluation analysis result includes the pre-tightening force verification evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes: Based on the test information, measuring the installation pre-tightening force of the anti-loosening fastening system through the bolt of the anti-loosening fastening system to obtain a pre-tightening force measurement result; According to the pre-tightening force measurement result and the designed pre-tightening force of the anti-loosening fastening system, obtaining the pre-tightening force verification evaluation result of the anti-loosening fastening system.

6. The reliability evaluation method of the anti-loosening fastening system according to claim 1, wherein When the reliability evaluation analysis result includes the bolt joint slip force verification evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes: Based on the test information, determining the movement state between the connected parts when the designed lateral shear force is applied to the connected parts in the anti-loosening fastening system; According to the movement state, obtaining the bolt joint slip force verification evaluation result of the anti-loosening fastening system.

7. The reliability evaluation method of the anti-loosening fastening system according to claim 1, wherein When the reliability evaluation analysis result includes the lateral vibration verification evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes: Based on the test information, determining the anti-loosening ability obtained by the anti-loosening fastening system through a lateral vibration test according to a preset test standard; Comparing the anti-loosening ability with the standard anti-loosening ability corresponding to the preset test standard to obtain the lateral vibration verification evaluation result of the anti-loosening fastening system.

8. The reliability evaluation method of the anti-loosening fastening system according to claim 1, characterized in that When the reliability evaluation analysis result includes the environmental adaptability verification evaluation result of the anti-loosening fastening system, obtaining the reliability evaluation analysis result of the anti-loosening fastening system based on the test information includes: According to the number of repeated uses of the anti-loosening fastening system, determining the first decrease ratio of the pre-tightening force after repeated use of the anti-loosening fastening system; According to the working environment temperature parameter of the anti-loosening fastening system, determining the second decrease ratio of the pre-tightening force of the anti-loosening fastening system at the temperature corresponding to the working environment temperature parameter; According to the working environment corrosion condition parameter of the anti-loosening fastening system, determining the third decrease ratio of the pre-tightening force of the anti-loosening fastening system in the corrosion environment corresponding to the working environment corrosion condition parameter; According to the working environment vibration parameter of the anti-loosening fastening system, determining the fourth decrease ratio of the pre-tightening force of the anti-loosening fastening system in the vibration environment corresponding to the working environment temperature parameter; Obtain the environmental adaptability verification and evaluation result of the anti-loosening fastening system according to the first decrease ratio, the second decrease ratio, the third decrease ratio, the fourth decrease ratio, and the preset ratio.

9. The reliability evaluation method of the anti-loosening fastening system according to claim 1, characterized in that The method further includes: When the reliability evaluation and analysis result of the anti-loosening fastening system meets the preset standard, determine that the reliability of the anti-loosening fastening system meets the requirements.

10. The reliability evaluation method of the anti-loosening fastening system according to claim 1, wherein The method further includes: When any one of the verification and evaluation results in the reliability evaluation and analysis result of the anti-loosening fastening system does not meet the corresponding preset standard, generate a prompt message; the prompt message is used to indicate that the reliability of the anti-loosening fastening system does not meet the requirements.

11. A reliability evaluation device for a loosening prevention fastening system, characterized in that, It includes: An information acquisition module, configured to acquire the test information of the anti-loosening fastening system; The test information includes: the connection state information of the anti-loosening fastening system, the working condition information of the anti-loosening fastening system, and the key performance parameters of the anti-loosening fastener; the anti-loosening fastening system includes the anti-loosening fastener; A processing module, configured to obtain the reliability evaluation and analysis result of the anti-loosening fastening system based on the test information; Wherein, the processing module includes: A fourth processing unit, configured to use the average value of the first preset number of residual pre-tightening forces generated by cyclically vibrating the anti-loosening fastening system for the first preset number of times as a reference value, and use the first percentage of the reference value as a failure criterion; A fifth processing unit, configured to obtain the first average value and the first standard deviation corresponding to the anti-loosening fastening system cyclically vibrating for the first preset number of times according to the ratio of the first preset number of residual pre-tightening forces to the initial pre-tightening force; A third determination unit, configured to determine the second preset number of residual pre-tightening forces generated by cyclically vibrating the anti-loosening fastening system for the second preset number of times; A sixth processing unit, configured to obtain the second average value and the second standard deviation corresponding to the anti-loosening fastening system cyclically vibrating for the second preset number of times according to the ratio of the second preset number of residual pre-tightening forces to the initial pre-tightening force; A seventh processing unit, configured to obtain the residual pre-tightening force distribution condition corresponding to the anti-loosening fastening system cyclically vibrating for the second preset number of times according to the second preset number of residual pre-tightening forces and the initial pre-tightening force; An eighth processing unit, configured to obtain the reliability corresponding to the anti-loosening fastening system cyclically vibrating for the second preset number of times according to the failure threshold of the first average value, the failure threshold of the first standard deviation, the second average value, and the second standard deviation; the failure threshold of the first average value is determined according to the first average value and the first percentage; the failure threshold of the first standard deviation is determined according to the first standard deviation and the first percentage; A ninth processing unit, configured to obtain the lateral reliability verification and evaluation result of the anti-loosening fastening system according to the residual pre-tightening force distribution condition and the reliability.

12. An evaluation device for the reliability of a loosening prevention fastening system, characterized in that, It includes: A processor, a memory, and a program stored on the memory and executable on the processor. When the program is executed by the processor, it implements the steps of the anti-loosening fastening system reliability evaluation method according to any one of claims 1 to 10.

13. A readable storage medium, characterized in that, A program is stored on the readable storage medium, and when the program is executed by a processor, the steps in the method for evaluating the reliability of the anti-loosening fastening system according to any one of claims 1 to 10 are implemented.

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