Method and device for determining reliability of spherical flow distribution pair

Abstract

The embodiment of the present invention discloses a method and device for determining the reliability of a spherical flow distribution pair, the method comprising: performing a force analysis on the spherical flow distribution pair under a preset pressure and displacement; determining a probability density function of the stress distribution of the contact surface of the spherical flow distribution pair according to the force analysis result; determining a probability density function of the strength distribution of the contact surface; and determining the reliability of the spherical flow distribution pair using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution. The present invention achieves the beneficial effect of accurately determining the reliability of the spherical flow distribution pair.

Description

Technical Field

[0001] The present invention relates to the technical field of plunger pumps, and in particular to a method and device for determining the reliability of a spherical flow distribution pair. Background Art

[0002] At present, the common flow distribution pair of plunger pumps is generally a plane flow distribution pair, and its related theory is relatively complete. During the operation of the plunger pump, the plane flow distribution pair is subjected to the overturning moment, and the inclination angle and inclination direction of the cylinder end face fluctuate periodically. Generally, the three parameters of the minimum oil film gap, the inclination angle of the cylinder end face and the inclination direction angle of the cylinder end face are used to fully reflect the size and shape of the oil film of the flow distribution pair. However, the maximum and minimum oil film gaps and the inclination direction of the cylinder of the spherical flow distribution pair are constantly changing, so the theory of the plane flow distribution pair cannot be applied to the spherical flow distribution pair. Moreover, although the spherical flow distribution pair improves the overall performance of the plunger pump, the existing technology lacks a solution for in-depth analysis of the reliability of the spherical flow distribution pair, which restricts the improved design of the plunger pump to a certain extent.

[0003] It can be seen that the prior art lacks a solution for in-depth analysis of the reliability of spherical flow distribution pairs. Summary of the invention

[0004] In order to solve at least one technical problem in the above-mentioned background technology, the present invention proposes a method and device for determining the reliability of a spherical flow distribution pair.

[0005] In order to achieve the above object, according to one aspect of the present invention, a method for determining the reliability of a spherical flow distribution pair is provided, the method comprising:

[0006] Conduct stress analysis on the spherical flow distribution pair under preset pressure and displacement;

[0007] Determine the probability density function of the stress distribution on the contact surface of the spherical flow distribution pair according to the force analysis result;

[0008] determining a probability density function of the intensity distribution of the contact surface;

[0009] According to the probability density function of the stress distribution and the probability density function of the strength distribution, the reliability of the spherical flow distribution pair is determined by using the stress-strength interference theory.

[0010] Optionally, the reliability of the spherical flow distribution pair is determined by using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution, specifically including:

[0011] Determining a stress-intensity interference diagram using stress-intensity interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution;

[0012] The reliability of the spherical flow distribution pair is determined according to the stress-strength interference diagram.

[0013] Optionally, determining the reliability of the spherical flow distribution pair according to the stress-strength interference diagram specifically includes:

[0014] A reliability variation diagram of the spherical flow distribution pair is determined according to the stress-strength interference diagram.

[0015] Optionally, the reliability of the spherical flow distribution pair is determined by using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution, specifically including:

[0016] According to the probability density function of the stress distribution and the probability density function of the strength distribution, the reliability of the spherical flow distribution pair is determined by using the stress-strength interference theory and combining the degradation law of the allowable value of the contact surface.

[0017] Optionally, the force analysis of the spherical flow distribution pair under a preset pressure and displacement specifically includes:

[0018] The oil film between the spherical distribution pairs is modeled by finite element analysis to determine the oil film pressure distribution.

[0019] Optionally, the force analysis of the spherical flow distribution pair under a preset pressure and displacement specifically includes:

[0020] Determine the force of the plunger hole on the cylinder body;

[0021] The oil flow rate of the spherical flow distribution pair and the pressure of the inner and outer sealing zones of the spherical flow distribution pair are determined.

[0022] In order to achieve the above object, according to another aspect of the present invention, a device for determining the reliability of a spherical flow distribution pair is provided, the device comprising:

[0023] A force analysis unit is used to perform force analysis on the spherical flow distribution pair under a preset pressure and displacement;

[0024] A stress calculation unit, used to determine the probability density function of the stress distribution on the contact surface of the spherical distribution pair according to the force analysis result;

[0025] A strength calculation unit, used to determine a probability density function of the strength distribution of the contact surface;

[0026] The reliability determination unit is used to determine the reliability of the spherical flow distribution pair by using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution.

[0027] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for determining the reliability of a spherical flow distribution pair when executing the computer program.

[0028] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program / instruction is stored, and when the computer program / instruction is executed by a processor, the steps of the above-mentioned method for determining the reliability of a spherical flow distribution pair are implemented.

[0029] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer program product is also provided, including a computer program / instruction, which implements the steps of the above-mentioned method for determining the reliability of a spherical flow distribution pair when executed by a processor.

[0030] The beneficial effects of the present invention are:

[0031] The embodiment of the present invention performs a force analysis on the spherical flow distribution pair, then determines the probability density function of the stress distribution and the probability density function of the strength distribution on the contact surface of the spherical flow distribution pair, and then uses the stress-strength interference theory to determine the reliability of the spherical flow distribution pair, thereby achieving the beneficial effect of accurately determining the reliability of the spherical flow distribution pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0033] Figure 1 is a flow chart of a method for determining the reliability of a spherical flow distribution pair according to an embodiment of the present invention;

[0034] Figure 2 is a flow chart of determining reliability according to an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of a spherical flow distribution pair according to an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of stress-strength interference theory;

[0037] Figure 5 It is a structural block diagram of a method for determining the reliability of a spherical flow distribution pair according to an embodiment of the present invention;

[0038] Figure 6It is a schematic diagram of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0040] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0041] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

[0044] In order to solve the problem of reliability evaluation of the spherical distribution pair of a double-inclined axial piston pump under high pressure and large displacement, the present invention proposes a reliability evaluation method for the spherical distribution pair of a variable load piston pump with a certain piston inclination angle, which provides a practical and effective reliability evaluation method for tunnel equipment with relatively reliable reliability verification effect.

[0045] Figure 1 FIG. 1 is a flow chart of a method for determining the reliability of a spherical flow distribution pair according to an embodiment of the present invention. Figure 1 As shown, in one embodiment of the present invention, the method for determining the reliability of a spherical flow distribution pair of the present invention includes steps S101 to S104.

[0046] Step S101, performing force analysis on the spherical flow distribution pair under a preset pressure and displacement.

[0047] In one embodiment of the present invention, the preset displacement is 750 ml / r and the preset pressure is 35 MPa. Figure 3 shown.

[0048] Step S102, determining the probability density function of the stress distribution on the contact surface of the spherical flow distribution pair according to the force analysis result.

[0049] Step S103, determining the probability density function of the intensity distribution of the contact surface.

[0050] Step S104, determining the reliability of the spherical flow distribution pair by using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution.

[0051] Since the stress and strength of the contact surface of the spherical flow distribution pair change with time, the present invention dynamically solves its stress and strength and calculates the reliability of the spherical flow distribution pair based on the stress-strength interference theory. The stress-strength interference theory can be specifically described as follows Figure 4 shown.

[0052] Based on the above analysis of the force on the spherical flow distribution pair, the present invention calculates the reliability of the spherical flow distribution pair. The calculation formula of the reliability R can be as follows:

[0053]

[0054] Among them, δ is the strength of the component, s is the stress of the component, f(s) and g(δ) correspond to the probability density functions of the stress of the component and the material strength, respectively.

[0055] like Figure 2 As shown, in one embodiment of the present invention, the above step S104 determines the reliability of the spherical flow distribution pair based on the probability density function of the stress distribution and the probability density function of the strength distribution using the stress-strength interference theory, and specifically includes step S201 and step S202.

[0056] Step S201 : determining a stress-intensity interference diagram using stress-intensity interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution.

[0057] Step S202: determining the reliability of the spherical flow distribution pair according to the stress-strength interference diagram.

[0058] In one embodiment of the present invention, the step S202 of determining the reliability of the spherical flow distribution pair according to the stress-intensity interference diagram specifically includes:

[0059] A reliability variation diagram of the spherical flow distribution pair is determined according to the stress-strength interference diagram.

[0060] In one embodiment of the present invention, the step S104 determines the reliability of the spherical flow distribution pair using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution, and specifically includes:

[0061] According to the probability density function of the stress distribution and the probability density function of the strength distribution, the reliability of the spherical flow distribution pair is determined by using the stress-strength interference theory and combining the degradation law of the allowable value of the contact surface.

[0062] Because there is cumulative damage to the spherical flow pair under continuous operation, it is more accurate to calculate its reliability using the stress-strength-time model. Assume that the allowable [pv] value of the contact surface of the spherical flow pair obeys the following degradation law:

[0063]

[0064] Where n is the cumulative number of stress cycles at the current moment, is the initial permissible [pv] value of the cylinder block-port plate pair, is the allowable [pv] value of the cylinder block-port plate pair after n cycles, and k is the degradation parameter of the allowable [pv] value of the contact surface of the cylinder block-port plate pair.

[0065] In one embodiment of the present invention, the present invention performs reliability calculation based on the above-mentioned degradation law to obtain a stress-strength interference diagram and a reliability change diagram of the spherical flow distribution pair.

[0066] In one embodiment of the present invention, the above step S101 of performing force analysis on the spherical flow distribution pair under a preset pressure and displacement specifically includes:

[0067] The oil film between the spherical distribution pairs is modeled by finite element analysis to determine the oil film pressure distribution.

[0068] In one embodiment of the present invention, during the finite element modeling process, considering the high pressure and large displacement characteristics of the actual operation of the plunger pump, the displacement and pressure values ​​are taken as 750ml / r and 35MPa. In addition, the load spectrum is comprehensively considered to model the oil between the spherical distribution pairs.

[0069] In one embodiment of the present invention, the above step S101 of performing force analysis on the spherical flow distribution pair under a preset pressure and displacement specifically includes:

[0070] Determine the force of the plunger hole on the cylinder body;

[0071] The oil flow rate of the spherical flow distribution pair and the pressure of the inner and outer sealing zones of the spherical flow distribution pair are determined.

[0072] In one embodiment of the present invention, the present invention also considers the influence of the plunger inclination angle and the working conditions when performing force analysis on the spherical distribution pair, and calculates the force of the plunger hole on the cylinder body.

[0073] In one embodiment of the present invention, the force exerted by the plunger hole on the cylinder body is:

[0074]

[0075] In one embodiment of the present invention, when performing force analysis on the spherical distribution pair, the present invention also analyzes the contact surfaces of the two rough end surfaces of the rotor and the distribution plate.

[0076] Because during the operation of the plunger pump, the oil between the spherical distribution pairs will be compressed, adhered, and radially moved, and the magnitude of these phenomena will be affected by the surface roughness of the spherical distribution pair, which makes the analysis complicated. Therefore, in order to focus on the analysis of the influence of the oil and the spherical shape on the spherical distribution pair, the oil is simplified to a certain extent. And on the basis of the NS equation, the continuity equation and the momentum equation, the influence of the oil flow rate and the pressure of the inner and outer sealing belts on the spherical distribution pair is obtained.

[0077] In one embodiment of the present invention, when performing force analysis on the spherical flow distribution pair, the present invention also performs geometric analysis on the spherical contact surface of the spherical flow distribution pair.

[0078] Different from the plane flow distribution pair, the change of the spherical flow distribution pair structure will lead to the change of its structural analysis method, so it is necessary to establish a new three-dimensional coordinate system for the spherical structure. Then, based on the actual size and actual force of the spherical flow distribution pair, the force on the spherical flow distribution pair in each coordinate direction is analyzed.

[0079] As can be seen from the above embodiments, the present invention analyzes the stress conditions of the plunger pump with a spherical distribution pair and a tilted plunger through mathematical tools and mechanical theories, finds out the main parameters that affect its working reliability, and has a deeper analysis of the pressure, friction and oil pressure of the spherical distribution pair during operation, providing a theoretical basis for the subsequent improvement of the plunger pump structure. And on the basis of the stress-strength interference theory, it is found that the plunger pump with a spherical distribution pair and a tilted plunger has a high reliability, which provides an improvement direction for improving the reliability of the plunger pump in the future, and also provides theoretical support for its application in practice.

[0080] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0081] Based on the same inventive concept, an embodiment of the present invention further provides a device for determining the reliability of a spherical flow distribution pair, which can be used to implement the method for determining the reliability of a spherical flow distribution pair described in the above embodiment, as described in the following embodiment. Since the principle of solving the problem by the device for determining the reliability of a spherical flow distribution pair is similar to that of the method for determining the reliability of a spherical flow distribution pair, the embodiment of the device for determining the reliability of a spherical flow distribution pair can refer to the embodiment of the method for determining the reliability of a spherical flow distribution pair, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements predetermined functions. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0082] Figure 5 : is a structural block diagram of a device for determining the reliability of a spherical flow distribution pair according to an embodiment of the present invention. Figure 5 As shown, in one embodiment of the present invention, the device for determining the reliability of a spherical flow distribution pair of the present invention comprises:

[0083] A force analysis unit 1 is used to perform force analysis on the spherical flow distribution pair under a preset pressure and displacement;

[0084] A stress calculation unit 2, used to determine the probability density function of the stress distribution on the contact surface of the spherical flow distribution pair according to the force analysis result;

[0085] A strength calculation unit 3, used to determine a probability density function of the strength distribution of the contact surface;

[0086] The reliability determination unit 4 is used to determine the reliability of the spherical flow distribution pair by using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution.

[0087] In one embodiment of the present invention, the reliability determination unit 4 specifically includes:

[0088] A stress-strength interference diagram determination module, used to determine a stress-strength interference diagram using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution;

[0089] A reliability determination module is used to determine the reliability of the spherical flow distribution pair according to the stress-strength interference diagram.

[0090] In one embodiment of the present invention, the reliability determination module is specifically used to determine the reliability change diagram of the spherical flow distribution pair according to the stress-strength interference diagram.

[0091] In one embodiment of the present invention, the reliability determination unit 4 is specifically used to determine the reliability of the spherical distribution pair based on the probability density function of the stress distribution and the probability density function of the strength distribution, using the stress-strength interference theory, and combining the degradation law of the allowable value of the contact surface.

[0092] In one embodiment of the present invention, the force analysis unit 1 specifically includes:

[0093] The finite element analysis module is used to model the oil film between the spherical distribution pairs through finite element analysis to determine the oil film pressure distribution.

[0094] In one embodiment of the present invention, the force analysis unit 1 specifically includes:

[0095] A force determination module, used to determine the force of the plunger hole on the cylinder body;

[0096] The flow and pressure determination module is used to determine the oil flow of the spherical flow distribution pair and the pressure of the inner and outer sealing zones of the spherical flow distribution pair.

[0097] In order to achieve the above object, according to another aspect of the present application, a computer device is also provided. Figure 6 As shown, the computer device includes a memory, a processor, a communication interface and a communication bus. A computer program that can be executed on the processor is stored in the memory. When the processor executes the computer program, the steps in the above-mentioned embodiment method are implemented.

[0098] The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0099] The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs and units, such as the corresponding program units in the above method embodiments of the present invention. The processor executes various functional applications of the processor and works data processing by running the non-transitory software programs, instructions and modules stored in the memory, that is, implementing the method in the above method embodiments.

[0100] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0101] The one or more units are stored in the memory, and when executed by the processor, the method in the above embodiment is performed.

[0102] The specific details of the above-mentioned computer device can be understood by referring to the corresponding related descriptions and effects in the above-mentioned embodiments, and will not be repeated here.

[0103] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a computer-readable storage medium is also provided, wherein the computer-readable storage medium stores a computer program, and the computer program implements the steps in the above-mentioned method for determining the reliability of the spherical flow distribution pair when executed in a computer processor. Those skilled in the art can understand that the implementation of all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program can include the processes of the embodiments of the above-mentioned methods when executed. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviated as: HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0104] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a computer program product is also provided, including a computer program / instruction, which implements the steps of the above-mentioned method for determining the reliability of a spherical flow distribution pair when executed by a processor.

[0105] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the reliability of a spherical flow distribution pair, characterized in that: include: Conduct stress analysis on the spherical flow distribution pair under preset pressure and displacement; Determine the probability density function of the stress distribution on the contact surface of the spherical flow distribution pair according to the force analysis result; determining a probability density function of the intensity distribution of the contact surface; Determining the reliability of the spherical flow distribution pair using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution; The method of determining the reliability of the spherical flow distribution pair by using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution specifically includes: According to the probability density function of the stress distribution and the probability density function of the strength distribution, the reliability of the spherical flow distribution pair is determined by using the stress-strength interference theory and combining the degradation law of the allowable value of the contact surface. The allowable value of the contact surface obeys the following degradation law: Where n is the cumulative number of stress cycles at the current moment, is the initial allowable value of the cylinder block-port plate pair, is the allowable value of the cylinder block-port plate pair after n cycles, and k is the degradation parameter of the allowable value of the contact surface of the cylinder block-port plate pair; The force analysis of the spherical flow distribution pair under the preset pressure and displacement specifically includes: Modeling the oil film between the spherical flow distribution pairs through finite element analysis to determine the oil film pressure distribution; Determine the force exerted by the plunger hole on the cylinder body, where the force exerted by the plunger hole on the cylinder body is: The oil flow rate of the spherical flow distribution pair and the pressure of the inner and outer sealing zones of the spherical flow distribution pair are determined.

2. The method for determining the reliability of a spherical flow distribution pair according to claim 1, characterized in that: The method of determining the reliability of the spherical flow distribution pair by using the stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution specifically includes: Determining a stress-intensity interference diagram using stress-intensity interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution; The reliability of the spherical flow distribution pair is determined according to the stress-strength interference diagram.

3. The method for determining the reliability of a spherical flow distribution pair according to claim 2, characterized in that: Determining the reliability of the spherical flow distribution pair according to the stress-strength interference diagram specifically includes: A reliability variation diagram of the spherical flow distribution pair is determined according to the stress-strength interference diagram.

4. A device for determining the reliability of a spherical flow distribution pair, characterized in that: include: A force analysis unit is used to perform force analysis on the spherical flow distribution pair under a preset pressure and displacement; A stress calculation unit, used to determine a probability density function of stress distribution on the contact surface of the spherical flow distribution pair according to a force analysis result; A strength calculation unit, used to determine a probability density function of the strength distribution of the contact surface; A reliability determination unit, configured to determine the reliability of the spherical flow distribution pair by using stress-strength interference theory according to the probability density function of the stress distribution and the probability density function of the strength distribution; The reliability determination unit is specifically used to determine the reliability of the spherical flow distribution pair according to the probability density function of the stress distribution and the probability density function of the strength distribution, using the stress-strength interference theory, and combining the degradation law of the allowable value of the contact surface, and the allowable value of the contact surface obeys the following degradation law: Where n is the cumulative number of stress cycles at the current moment, is the initial allowable value of the cylinder block-port plate pair, is the allowable value of the cylinder block-port plate pair after n cycles, and k is the degradation parameter of the allowable value of the contact surface of the cylinder block-port plate pair; The force analysis unit specifically comprises: A finite element analysis module, used for modeling the oil film between the spherical flow distribution pairs through finite element analysis to determine the oil film pressure distribution; The force determination module is used to determine the force of the plunger hole on the cylinder body, wherein the force of the plunger hole on the cylinder body is: The flow and pressure determination module is used to determine the oil flow of the spherical flow distribution pair and the pressure of the inner and outer sealing zones of the spherical flow distribution pair.

5. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

7. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

Images