Hydraulic component life prediction method, device and storage medium

Abstract

The present disclosure provides a life prediction method, device and storage medium for hydraulic components, and relates to the field of engineering machinery hydraulic industry. The method includes: obtaining the working pressure and current friction pair leakage of the hydraulic component; calculating the number of reversals corresponding to the current friction pair leakage according to the corresponding relationship between the friction pair leakage, working pressure, reversal times, first abrasive wear function and first erosion wear function of the hydraulic component; and predicting the life of the hydraulic component according to the number of reversals corresponding to the friction pair leakage when the hydraulic component fails and the number of reversals corresponding to the current friction pair leakage. The present disclosure provides a theoretical basis for the reliability life design and prediction of engineering machinery hydraulic components, and improves the accuracy of life prediction of hydraulic components.

Description

Technical Field

[0001] The present disclosure relates to the field of engineering machinery hydraulic industry, and in particular to a life prediction method, device and storage medium for hydraulic components. Background Art

[0002] Engineering machinery has the characteristics of changeable working objects, complex working methods, harsh working environment and untimely maintenance. These characteristics lead to frequent problems such as fatigue, failure and reduced working efficiency of the whole machine and parts, thus affecting the reliability and working safety of the whole machine. In order to achieve reliability and customized life design in the product design stage and ensure the service reliability of the whole machine and key parts, the use of scientific and reasonable reliability life prediction and evaluation technology is the basis and objective basis for achieving the above design requirements. Therefore, the study of the reliability life prediction and evaluation method of hydraulic core parts has important theoretical significance and engineering application value.

[0003] The methods used for fault diagnosis of hydraulic systems mainly include expert systems and neural network systems. Expert systems will encounter the problem of knowledge acquisition "bottleneck", such as the knowledge base is too large and unstructured, and the solution method is single, which makes its support capacity limited; neural networks have self-learning functions and can realize nonlinear complex mapping, but the algorithm may fall into the local optimal solution and there is an "overfitting" phenomenon, which affects the prediction ability. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is to provide a method, device and storage medium for predicting the life of a hydraulic component, thereby improving the accuracy of the life prediction of the hydraulic component.

[0005] According to one aspect of the present disclosure, a method for predicting the life of a hydraulic component is proposed, comprising: obtaining the working pressure and current friction pair leakage of the hydraulic component; calculating the number of reversing times corresponding to the current friction pair leakage according to the correspondence between the friction pair leakage, working pressure, number of reversing times, first abrasive wear function and first erosion wear function of the hydraulic component; and predicting the life of the hydraulic component according to the number of reversing times corresponding to the friction pair leakage when the hydraulic component fails and the number of reversing times corresponding to the current friction pair leakage.

[0006] In some embodiments, obtaining the current friction pair leakage of the hydraulic component includes: obtaining the hydraulic oil particle data before the main valve of the hydraulic component and the hydraulic oil particle data after the main valve; determining the total wear of the valve core of the hydraulic component based on the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve; and determining the current friction pair leakage of the hydraulic component based on the total wear of the valve core of the hydraulic component.

[0007] In some embodiments, the second abrasive wear function and the second erosion wear function are calculated based on the correspondence between the total wear amount and the working pressure, the valve core displacement distance, the number of reversing times, the second abrasive wear function and the second erosion wear function; the first abrasive wear function is calculated based on the second abrasive wear function; and the first erosion wear function is calculated based on the second erosion wear function.

[0008] In some embodiments, the corresponding relationship among the friction pair leakage of the hydraulic component, the working pressure, the number of reversing times, the first abrasive wear function and the first erosion wear function includes:

[0009]

[0010] Where N is the number of commutation times, q is the leakage of the friction pair, ΔP is the working pressure, C m is the first abrasive wear function, C r is the first erosion wear function, and n is an empirical constant.

[0011] In some embodiments,

[0012]

[0013]

[0014] Among them, C d is the flow coefficient, ρ is the oil density, C m1 is the second abrasive wear function, C r1 is the second erosion wear function.

[0015] In some embodiments,

[0016] V m =C m1 ΔPlN

[0017]

[0018] V=V m +V r

[0019] Among them, V m is the abrasive wear, V r is the erosion wear, l is the valve core displacement distance, and V is the total wear of hydraulic components.

[0020] According to another aspect of the present disclosure, a life prediction device for a hydraulic component is also proposed, comprising: a pressure sensor configured to obtain the working pressure of the hydraulic component; and a controller configured to obtain the current friction pair leakage of the hydraulic component, calculate the number of reversing times corresponding to the current friction pair leakage according to the correspondence between the friction pair leakage, the working pressure, the number of reversing times, the first abrasive wear function and the first erosion wear function of the hydraulic component, and predict the life of the hydraulic component according to the number of reversing times corresponding to the friction pair leakage when the hydraulic component fails and the number of reversing times corresponding to the current friction pair leakage.

[0021] In some embodiments, the life prediction device also includes: a particle detection device, configured to obtain hydraulic oil particle data before the main valve of the hydraulic component and hydraulic oil particle data after the main valve, wherein the controller is also configured to determine the total wear of the valve core of the hydraulic component based on the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve; and determine the current friction pair leakage of the hydraulic component based on the total wear of the valve core of the hydraulic component.

[0022] In some embodiments, the controller is also configured to calculate the second abrasive wear function and the second erosion wear function based on the correspondence between the total wear amount and the working pressure, the valve core displacement distance, the number of switching times, the second abrasive wear function and the second erosion wear function; calculate the first abrasive wear function based on the second abrasive wear function; and calculate the first erosion wear function based on the second erosion wear function.

[0023] According to another aspect of the present disclosure, a life prediction device for a hydraulic component is also provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the life prediction method as described above based on instructions stored in the memory.

[0024] According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is also provided, on which computer program instructions are stored, and when the instructions are executed by a processor, the life prediction method as described above is implemented.

[0025] In the disclosed embodiment, the correspondence between the friction pair leakage of the hydraulic component and the working pressure and the number of reversing times can be used to calculate the number of reversing times corresponding to the current and failed friction pair leakage of the hydraulic component, thereby providing a theoretical basis for the reliability life design and prediction of hydraulic components of construction machinery and improving the accuracy of the life prediction of the hydraulic components.

[0026] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0028] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0029] Figure 1 The flowchart of some embodiments of the life prediction method of the hydraulic component disclosed in the present invention is shown.

[0030] Figure 2 Schematic diagram of the flow chart of other embodiments of the life prediction method of the hydraulic component disclosed in the present invention.

[0031] Figure 3 Schematic diagram of the micro-abrasive wear model.

[0032] Figure 4 It is a schematic diagram of the structure of some embodiments of the life prediction device of the hydraulic component disclosed in the present invention.

[0033] Figure 5 Schematic diagrams of the structures of other embodiments of the life prediction device for hydraulic components disclosed in the present invention.

[0034] Figure 6 Schematic diagrams of the structures of other embodiments of the life prediction device for hydraulic components disclosed in the present invention. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0036] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0038] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0042] The hydraulic system of construction machinery is contaminated by oil due to the infiltration of external pollutants, oil deterioration and wear of relatively moving parts. The main failure forms are accumulation failure, jamming failure and erosion failure. Wear is a reliability design problem. One of the criteria for judging the reliability of hydraulic components is based on erosion wear. The internal leakage will increase significantly, resulting in a decrease in the performance of hydraulic components or even failure. The main influencing factors of erosion wear failure are the erosion rate of contaminant particles, the hardness of hydraulic component materials and the properties of contaminant particles. When erosion wear failure occurs, it will seriously affect the reliability and safety of the hydraulic system.

[0043] In the related art, it is not considered that the wear between the key friction pairs of the components leads to increased leakage, which affects the working efficiency of the components. In addition, the relationship between the degradation process of the components and the life of the components is unclear, so it is impossible to determine the impact of the friction pairs of key hydraulic components on the life of the hydraulic system. This disclosure provides a theoretical basis for the mechanism of increased leakage caused by wear and changes in the inlet and outlet pressure of the throttle groove, and proposes a hydraulic component reliability life design and prediction.

[0044] Figure 1 The flowchart of some embodiments of the life prediction method of the hydraulic component disclosed in the present invention is shown.

[0045] In step 110, the working pressure of the hydraulic component is obtained.

[0046] In some embodiments, the hydraulic component is a multi-way reversing valve, and the working pressure is the pressure difference between the inlet and outlet of the throttling groove.

[0047] In some embodiments, the hydraulic component may also be a pump, a cartridge valve, a motor, a pilot handle, an integrated valve, and other components.

[0048] In step 120 , the current friction pair leakage of the hydraulic component is obtained.

[0049] Step 110 and step 120 may be performed simultaneously or in any order.

[0050] In some embodiments, the current friction pair leakage of the hydraulic component is obtained as follows: Figure 2 As shown:

[0051] In step 210, the hydraulic oil particle data before the main valve of the hydraulic component and the hydraulic oil particle data after the main valve are acquired.

[0052] In some embodiments, a wear particle detection chip installed in the oil circuit before and after the main valve detects the hydraulic oil particle data before the main valve of the hydraulic component and the hydraulic oil particle data after the main valve.

[0053] In step 220 , the total wear amount of the valve core of the hydraulic component is determined based on the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve.

[0054] In some embodiments, the total wear amount of the valve core is determined according to the volume difference between the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve.

[0055] In some embodiments, in order to reduce the accidental error caused by measuring the volume of particles, multiple continuous detection statistics are performed during the measurement, and then the average value is taken as the final detection result.

[0056] In some embodiments, the total wear amount is the sum of the abrasive wear amount and the erosive wear amount.

[0057] In step 230 , the current friction pair leakage of the hydraulic component is determined according to the total wear amount of the valve core of the hydraulic component.

[0058] In some embodiments,

[0059] Among them, q is the leakage of the friction pair, C d is the flow coefficient, ρ is the oil density, A is the oil flow area, V is the total wear, l is the valve core displacement distance, and ΔP is the working pressure.

[0060] In step 130, the number of reversing times corresponding to the current friction pair leakage is calculated according to the corresponding relationship among the friction pair leakage of the hydraulic component, the working pressure, the number of reversing times, the first abrasive wear function and the first erosion wear function.

[0061] In some embodiments, abrasive wear of the friction pair may generate erosion particles, which may cause erosion wear on the valve core. Wear on the surface of key friction pairs may increase leakage and reduce the working efficiency of components.

[0062] In some embodiments,

[0063] Where N is the number of commutation times, q is the leakage of the friction pair, ΔP is the working pressure, C m is the first abrasive wear function, C r is the first erosion wear function, and n is an empirical constant.

[0064] In step 140 , the life of the hydraulic component is predicted based on the number of switching times corresponding to the amount of friction pair leakage when the hydraulic component fails and the number of switching times corresponding to the current amount of friction pair leakage.

[0065] When the working efficiency of a component drops to the design value, the component is judged to have failed. Therefore, the leakage of the friction pair when the hydraulic component fails is determined based on the failure leakage of the reliability standard component.

[0066] In some embodiments, the number of reversing times represents the operating time of the component. It can be seen from the above formula that the leakage of the friction pair is positively correlated with the working pressure and the operating time.

[0067] In the above embodiment, through the correspondence between the friction pair leakage of the hydraulic component and the working pressure and the number of reversing times, the number of reversing times corresponding to the current and failure friction pair leakage of the hydraulic component can be calculated, which provides a theoretical basis for the reliability life design and prediction of the hydraulic components of engineering machinery and improves the accuracy of the life prediction of the hydraulic components.

[0068] In some embodiments of the present disclosure, after determining the total wear of the valve core of the hydraulic component, the second abrasive wear function and the second erosion wear function are calculated according to the correspondence between the total wear and the working pressure, the valve core displacement distance, the number of switching times, the second abrasive wear function and the second erosion wear function; the first abrasive wear function is calculated according to the second abrasive wear function; and the first erosion wear function is calculated according to the second erosion wear function.

[0069] For example,

[0070] V m =C m1 ΔPlN

[0071]

[0072]

[0073] Among them, V m is the abrasive wear, V r is the erosion wear, l is the valve core displacement distance, V is the total wear of the hydraulic components, C m1 is the second abrasive wear function, C r1 is the second erosion wear function, M is the valve core wear amount; ρ x is the density of valve core material, ΔP is the working pressure.

[0074] In some embodiments, C can be obtained by collecting multiple sets of data at intervals. m1 and C r1 .

[0075]

[0076]

[0077] Among them, C d is the flow coefficient, ρ is the oil density, C m1 is the second abrasive wear function, C r1 is the second erosion wear function, C m is the first abrasive wear function, C r is the first erosion wear function.

[0078] The reliability of the whole machine of engineering machinery has the characteristics of long test cycle, high cost, and many influencing factors. Therefore, online detection of the whole machine for key hydraulic components will be one of the important ways to verify product failure. The accuracy of online detection judgment depends on the accuracy of the input failure model. Sensors are used to collect load data of engineering machinery under typical operating conditions. A bench fatigue test load loading method is compiled based on the measured load data. Bench fatigue tests are carried out on key hydraulic components of medium-sized engineering machinery. The relationship between load, flow and wear is studied through formulas to verify the accuracy of the failure model. The model between the friction pair leakage, working pressure, and number of reversing times of the hydraulic components disclosed in the present invention will be derived below. The hydraulic components of this embodiment are introduced using a multi-way reversing valve as an example.

[0079] Figure 3 The figure is a schematic diagram of the microscopic abrasive wear model. Through investigation and research, it is found that due to machining and cleaning process problems and pressure shock during the working process, the unremoved flash, burrs and sharp metal at the intersection of some pipes in the multi-way reversing valve will be peeled off from the body and will be free inside the system. Once entering the friction pair, abrasive wear will occur, resulting in increased internal leakage, reduced reliability and working efficiency of the main engine of the multi-way reversing valve. Therefore, the life of the multi-way reversing valve needs to take abrasive wear into consideration.

[0080] Considering the influence of the surface film and the increase in the size of the contact peak due to tangential stress and boundary film peeling, the wear rate when the sliding distance is s, that is, the wear amount per unit distance, is obtained:

[0081]

[0082] Among them, k m is a coefficient related to material properties, f is the friction coefficient, a and β are empirical constants, σ S is the compressive yield limit and W is the bearing load.

[0083] In the multi-way reversing valve, the abrasive wear of the valve body and valve core friction pair is:

[0084]

[0085] Among them, Vm is the abrasive wear amount, is the abrasive wear function, is the pressure difference between the inlet and outlet of the throttling groove, l is the displacement distance of the valve core, and N is the number of times the valve core is switched.

[0086] During the operation of hydraulic components, particulate contaminants in the oil will erode the surfaces of key friction pairs and increase the amount of wear. Therefore, the life of the multi-way reversing valve needs to take into account the erosion and wear of the valve core.

[0087] According to the E / CRC erosion wear model, its expression is:

[0088]

[0089] Among them, C is the empirical constant, BH is the Brinell hardness of the material, F S is the shape parameter of the particle, V p is the erosion velocity of the particles, n is the velocity index, f(θ 1 ) is the collision angle function of the particles, R erosion A is the wear amount per unit wall area per unit time, face is the area of ​​the wall calculation unit, N p is the number of particles that collide on a unit area per unit time, m p is the mass flow rate of particles.

[0090] The erosion speed is indirectly controlled by controlling the flow rate of the control system, so as to obtain the relationship between the erosion speed and the erosion wear of the valve core. The conversion formula between the erosion speed and the flow rate is:

[0091]

[0092] Where q is the flow rate through the valve, in L / min, q is the inlet diameter of the valve being tested, in mm, and v p is the erosion velocity in m / s.

[0093] The calculation formula for the erosion wear of the valve core is:

[0094]

[0095] Among them, t is the working time, is the second erosion wear function, ΔP is the system pressure in the valve working state, N is the number of valve core reversals, and μ is the valve core movement speed.

[0096] The total wear of the valve core is:

[0097] V=V m +V r

[0098] Among them, Vm is the abrasive wear, V r is the erosion wear, l is the valve core displacement distance, and V is the total wear of hydraulic components.

[0099] Since component pressure is easier to measure, the flow through the valve can be calculated from the multi-way valve pressure difference:

[0100]

[0101] Among them, C d is the flow coefficient, ρ is the oil density, and A is the flow area.

[0102] After the key friction pair is worn, the matching clearance increases, and the calculation formula of the oil flow area A is:

[0103]

[0104] It follows that:

[0105]

[0106] Among them, q is the leakage of the friction pair, is the first abrasive wear function, is the first erosion wear function, ΔP is the pressure difference between the inlet and outlet of the throttling groove, and N is the number of valve core reversing times.

[0107] The above formula can be derived:

[0108]

[0109] Through the above formula, the number of reversing times corresponding to the leakage of the friction pair when the multi-way reversing valve fails and the number of reversing times corresponding to the current leakage of the friction pair can be calculated, thereby providing a theoretical basis for the reliability life design and prediction of hydraulic components of construction machinery.

[0110] Figure 4 Schematic diagram of the structure of some embodiments of the life prediction device of the hydraulic component disclosed in the present invention. The device includes a pressure sensor 410 and a controller 420.

[0111] The pressure sensor 410 is configured to obtain the working pressure of the hydraulic component.

[0112] In some embodiments, the working pressure is the pressure difference between the inlet and outlet of the throttling groove.

[0113] Controller 420 is configured to obtain the current friction pair leakage of the hydraulic component, calculate the number of reversing times corresponding to the current friction pair leakage according to the correspondence between the friction pair leakage, working pressure, number of reversing times, first abrasive wear function and first erosion wear function of the hydraulic component, and predict the life of the hydraulic component according to the number of reversing times corresponding to the friction pair leakage when the hydraulic component fails and the number of reversing times corresponding to the current friction pair leakage.

[0114] In some embodiments, the device further includes a particle detection device 430, which is configured to obtain hydraulic oil particle data before the main valve of the hydraulic component and hydraulic oil particle data after the main valve. The controller 420 is configured to determine the total wear of the valve core of the hydraulic component based on the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve; and determine the current friction pair leakage of the hydraulic component based on the total wear of the valve core of the hydraulic component.

[0115] In some embodiments, the controller 420 is also configured to calculate the second abrasive wear function and the second erosion wear function based on the correspondence between the total wear amount and the working pressure, the valve core displacement distance, the number of switching times, the second abrasive wear function and the second erosion wear function; calculate the first abrasive wear function based on the second abrasive wear function; and calculate the first erosion wear function based on the second erosion wear function.

[0116] In some embodiments of the present disclosure, Figure 5 As shown, the controller 420 includes a main controller 510 and a cloud server 520, and the particle detection device 430 includes oil particle detection chips 531 and 532, wherein the main controller 510 converts the signals output by the oil particle detection chips 531 and 532 into data information, and the cloud server 520 calculates the number of switching times based on the data information and predicts the life of the hydraulic components.

[0117] In the above embodiment, through the correspondence between the friction pair leakage of the hydraulic component and the working pressure and the number of reversing times, the number of reversing times corresponding to the current and failure friction pair leakage of the hydraulic component can be calculated, providing a theoretical basis for the reliability life design and prediction of hydraulic components of engineering machinery.

[0118] Figure 6 Schematic diagram of the structure of other embodiments of the life prediction device of hydraulic components disclosed in the present invention. The device 600 includes a memory 610 and a processor 620. The memory 610 can be a disk, a flash memory or any other non-volatile storage medium. The memory 610 is used to store Figure 1 or the instructions in the corresponding embodiment of 2. The processor 620 is coupled to the memory 610 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller. The processor 620 is used to execute the instructions stored in the memory.

[0119] In some embodiments, the processor 620 is coupled to the memory 610 via a BUS 630. The device 600 can also be connected to an external storage system 650 via a storage interface 640 to call external data, and can also be connected to a network or another computer system (not shown) via a network interface 660. No further detailed description will be given here.

[0120] In this embodiment, data instructions are stored in a memory and then processed by a processor, thereby providing a theoretical basis for the reliability life design and prediction of hydraulic components of engineering machinery.

[0121] In some other embodiments, a non-transitory computer-readable storage medium stores computer program instructions, which when executed by a processor implement Figure 1 Or the steps of the method in the corresponding embodiment of 2. Those skilled in the art should understand that the embodiments of the present disclosure can be provided as methods, devices, or computer program products. Therefore, the present disclosure can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0123] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0124] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0125] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0126] Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A method for predicting the life of a hydraulic component, comprising: Obtain the working pressure of hydraulic components and the current leakage of friction pairs; Using formula V m =C m1 ΔPlN, V=V m +V r , calculate the second abrasive wear function C m1 and the second erosion wear function C r1 , where V m is the abrasive wear, V r is the erosion wear, l is the displacement distance of the valve core, V is the total wear of the hydraulic components, Δp is the working pressure, N is the number of reversing times, and n is an empirical constant; According to the formula Calculate the first abrasive wear function C m , C d is the flow coefficient, ρ is the oil density; According to the formula Calculate the first erosion wear function C r ; Calculating the number of reversing times corresponding to the current friction pair leakage according to the corresponding relationship among the friction pair leakage, the working pressure, the number of reversing times, the first abrasive wear function and the first erosion wear function of the hydraulic component; as well as The life of the hydraulic component is predicted according to the number of reversing times corresponding to the leakage amount of the friction pair when the hydraulic component fails and the number of reversing times corresponding to the current leakage amount of the friction pair.

2. The life prediction method according to claim 1, wherein: Obtaining the current friction pair leakage of the hydraulic component includes: Acquire the hydraulic oil particle data before the main valve of the hydraulic component and the hydraulic oil particle data after the main valve; Determining the total wear amount of the valve core of the hydraulic component according to the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve; and The current friction pair leakage of the hydraulic component is determined according to the total wear amount of the valve core of the hydraulic component.

3. The life prediction method according to claim 1 or 2, wherein: The corresponding relationship among the friction pair leakage, working pressure, number of reversing, first abrasive wear function and first erosion wear function of the hydraulic component includes: Where N is the number of commutation times, q is the leakage of the friction pair, ΔP is the working pressure, C m is the first abrasive wear function, C r is the first erosion wear function, and n is an empirical constant.

4. A life prediction device for a hydraulic component, comprising: a pressure sensor configured to obtain a working pressure of a hydraulic component; as well as The controller is configured to obtain the current friction pair leakage of the hydraulic component, using the formula V m =C m1 ΔPlN, V=V m +V r , calculate the second abrasive wear function C m1 and the second erosion wear function C r1 , where V m is the abrasive wear, V r is the erosion wear, l is the displacement distance of the valve core, V is the total wear of the hydraulic components, ΔP is the working pressure, N is the number of reversing times, and n is an empirical constant; according to the formula Calculate the first abrasive wear function C m , C d is the flow coefficient, ρ is the oil density; according to the formula Calculate the first erosion wear function C r ; According to the correspondence between the friction pair leakage, working pressure, number of reversing, first abrasive wear function and first erosion wear function of the hydraulic component, calculate the number of reversing corresponding to the current friction pair leakage; according to the number of reversing corresponding to the friction pair leakage when the hydraulic component fails and the number of reversing corresponding to the current friction pair leakage, predict the life of the hydraulic component.

5. The life prediction device according to claim 4, further comprising: The particle detection device is configured to obtain the hydraulic oil particle data before the main valve of the hydraulic component and the hydraulic oil particle data after the main valve, wherein: The controller is also configured to determine the total wear of the valve core of the hydraulic component based on the hydraulic oil particle data before the main valve and the hydraulic oil particle data after the main valve; and determine the current friction pair leakage of the hydraulic component based on the total wear of the valve core of the hydraulic component.

6. A life prediction device for a hydraulic component, comprising: Memory; as well as A processor coupled to the memory, wherein the processor is configured to execute the life prediction method according to any one of claims 1 to 3 based on instructions stored in the memory.

7. A non-transitory computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the life prediction method according to any one of claims 1 to 3.

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