Piston ring life testing device, testing method, electronic device, and storage medium

Abstract

The present application relates to the technical field of piston ring life test, in particular to a piston ring life test device, a test method, an electronic device and a storage medium. The device comprises a crank connecting rod driving assembly, a temperature control assembly and a pressure supply assembly. The device further comprises a first temperature sensor TA for measuring the temperature of the cylinder cavity of the piston cylinder and a first pressure sensor PA for measuring the pressure of the cylinder cavity. The cavity measured by the first temperature sensor TA is the working cavity, and the other cavity is the leakage cavity. The first temperature sensor TA, the first pressure sensor PA and the inlet of the pressure supply assembly are all located at the working cavity. The device further comprises a flow meter L for measuring the leakage amount of the leakage cavity and a tachometer V for measuring the rotating speed of the power source at the crank connecting rod driving assembly. The device can accurately test the life of the piston ring under given conditions, the wear detection of the piston ring is more convenient, and the material selection cycle is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston ring life test, in particular to a piston ring life test device, a test method, an electronic device and a storage medium. BACKGROUND

[0002] The piston ring is an important sealing element of the compressor, and has various materials and structural forms. The failure of the piston ring will cause the entire compressor to be unable to work normally. Since the service life of the piston ring is generally more than several hundred hours or even several thousand hours, it takes 3-4 months to test a sample, which causes the research and development design cycle to be unnecessarily prolonged and the research and development cost to be increased. This obviously cannot meet the needs of new product development test. If the friction tester is used to simulate the service life of the piston ring, the actual use process of the piston ring cannot be simulated, a large amount of simulation calculation is required, and the precision is not easy to guarantee. Therefore, it is urgent to solve. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a piston ring life test device with reasonable structure and practicality, which can accurately test the service life of the piston ring under given conditions, and the wear detection of the piston ring is more convenient, which is beneficial to shorten the material selection period.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] A piston ring life test device, characterized in that: it comprises a crank connecting rod driving assembly for driving the piston cylinder to work, a temperature control assembly for temperature control of the cylinder cavity of the piston cylinder, and a pressure supply assembly for providing working medium into the cylinder cavity of the piston cylinder; the device further comprises a first temperature sensor TA for measuring the temperature of the cylinder cavity of the piston cylinder and a first pressure sensor PA for measuring the pressure of the cylinder cavity, wherein the cavity measured by the first temperature sensor TA is the working cavity and the other cavity is the leakage cavity, the first temperature sensor TA, the first pressure sensor PA and the inlet of the pressure supply assembly are all located at the working cavity, the device further comprises a flow meter L for measuring the leakage amount of the leakage cavity and a tachometer V for measuring the rotating speed of the power source at the crank connecting rod driving assembly.

[0006] Preferably, the temperature control assembly comprises a water tank with a heater, the water tank is communicated with the cooling water jacket of the piston cylinder through the liquid inlet channel and the liquid outlet channel, and a water pump is arranged on the liquid inlet channel or the liquid outlet channel; the temperature control assembly further comprises a second temperature sensor TB for measuring the water temperature in the cooling water jacket.

[0007] Preferably, the pressure supply assembly comprises a high-pressure gas source, and an outlet of the high-pressure gas source is connected to the cylinder cavity of the piston cylinder via an outlet pipeline, on which a second pressure sensor PB, a solenoid valve SV and a pressure reducing valve PRV are arranged in sequence along the working medium flow direction; and a solenoid vent valve PCV for connecting to the external atmosphere or equipment is arranged on the outlet pipeline.

[0008] Preferably, the power source is an electric motor, and an output shaft of the power source is coaxially connected to the output end of the crank, and a connecting rod is arranged between the crank and the piston rod to form a power matching.

[0009] Preferably, a test method using the piston ring life test device comprises the following steps:

[0010] S1. The high-pressure gas source is inflated to an appropriate pressure;

[0011] S2. The pressure of the outlet pipeline is adjusted to the simulation working pressure by the pressure reducing valve PRV;

[0012] S3. When the value collected by the first pressure sensor PA and the value collected by the second pressure sensor PB are within a set error range, a step operation can be performed;

[0013] S4. The heater is started, and after the water tank is heated to a set temperature, the water pump starts to operate, and after the second temperature sensor PB reaches the set temperature, the power source starts to move, and stops until the flow meter L reaches the set flow value or the piston moves to the set working time;

[0014] S5. The wear amount f of the piston ring after increasing the speed is obtained by linear simulation h1 , specifically including:

[0015] In the ideal gas compression process, the heat generated by friction is taken away by the cooling system, and for a single-acting piston cylinder, the wear amount f of the piston ring per unit time h is:

[0016] f h = K (P1-P') nl / 2H

[0017] Wherein:

[0018] K is the wear coefficient of the piston ring;

[0019] P1 is the cylinder cavity pressure;

[0020] P' is the leakage cavity pressure, which is taken as normal pressure;

[0021] n is the reciprocating half cycle;

[0022] l is the stroke;

[0023] H is the surface hardness of the piston ring;

[0024] In linear simulation, the speed of the power source can be directly increased by y times, and then the wear amount f after increasing the speed is obtained h1 is:

[0025] f h1 = K (P1 - P') yn l / 2H.

[0026] Preferably, a test method using the piston ring life test device is characterized in that it comprises the following steps:

[0027] S1'. The high-pressure gas source is inflated to a suitable pressure;

[0028] S2'. Adjust the pressure of the outlet pipeline to the simulation working pressure through the pressure reducing valve PRV;

[0029] S3'. When the values collected by the first pressure sensor PA and the values collected by the second pressure sensor PB are within the set error range, a step operation can be performed;

[0030] S4'. Start the heater, and when the water tank is heated to the set temperature, start the water pump. When the second temperature sensor PB reaches the set temperature, start the power source, and stop when the flow meter L reaches the set flow value or the piston operates to the set working time;

[0031] S5'. Obtain the wear amount of the piston ring after increasing the pressure by a nonlinear simulation method. Specifically, first calculate the actual average gas pressure P1 of the piston cylinder, then adjust the pressure reducing valve PRV to y times the design average gas pressure P y to simulate, and divide into the following two cases:

[0032] (1) When calculated according to the isothermal process, the wear rate f under the isothermal process can be obtained according to the following formula hw is:

[0033] f hw = K [P0 ln (P2 / P0) - P'] nl / 2H

[0034] Wherein:

[0035] K is the wear coefficient of the piston ring;

[0036] P0 is the minimum pressure of the cylinder cavity during the test;

[0037] P2 is the set pressure value;

[0038] P' is the leakage cavity pressure, which is taken as normal pressure;

[0039] n is the half cycle of reciprocating motion;

[0040] l is the stroke;

[0041] H is the surface hardness of the piston ring;

[0042] When the set pressure value is increased by y times, the wear amount f after the pressure is increased hw ′ is:

[0043] f hw ′ = K (P0ln (yP2 / P0) - P′) nl / 2H;

[0044] (2) When calculated according to the isentropic process, the wear rate f under the isentropic process can be obtained according to the following formula hs is:

[0045]

[0046] wherein:

[0047] K is the wear coefficient of the piston ring;

[0048] P0 is the lowest pressure of the cylinder cavity at the time of the test;

[0049] P2 is the set pressure value;

[0050] P′ is the leakage cavity pressure, taking normal pressure;

[0051] n is the reciprocating motion half cycle;

[0052] l is the stroke;

[0053] H is the surface hardness of the piston ring;

[0054] z is the process index;

[0055] When the set pressure value is increased by y times, the wear amount f after the pressure is increased hs ′ is:

[0056]

[0057] Preferably, in the ideal gas compression process, the heat generated by friction is all taken away by the cooling system, and for a single-acting piston cylinder, the wear amount f of the piston ring per unit time h is:

[0058] f h = K (P1-P′) nl / 2H

[0059] wherein:

[0060] K is the wear coefficient of the piston ring;

[0061] P1 is the cylinder cavity pressure;

[0062] P′ is the leakage cavity pressure, taking normal pressure;

[0063] n is a reciprocating motion half cycle;

[0064] l is a stroke;

[0065] H is the surface hardness of the piston ring;

[0066] Under the isentropic process state, the wear ratio lambda can be obtained as:

[0067]

[0068] Preferably, an electronic device, characterized in that, comprising processor, input device, output device and memory, the processor, input device, output device and memory are connected in turn, the memory is used for storing computer program, the computer program includes program instruction, the processor is configured for calling the program instruction, executes the test method.

[0069] Preferably, a storage medium, characterized in that, the storage medium stores computer program, the computer program includes program instruction, the program instruction when being executed by processor makes the processor execute the test method.

[0070] The beneficial effects of the present application are that:

[0071] 1) Through the above scheme, the service life of the piston ring under given conditions can be accurately predicted. The present application can directly solve the practical engineering problems by simulating the motion speed of the piston ring, the working environment temperature, the pressure, the lubrication and the friction and various environmental conditions, judging the piston ring life cycle with the predetermined leakage amount.

[0072] 2) The present application can measure the piston ring wear amount within a specified time, and has the advantages of simple structure and convenient disassembly. It can be set to automatically stop after a certain time, or automatically stop after reaching the set leakage amount, so as to conveniently and flexibly detect the piston ring wear amount.

[0073] 3) The present application can quickly screen suitable piston ring materials. The present application can accelerate the wear of the piston ring by adjusting the pressure, running speed and other ways, greatly shorten the test period, quickly screen suitable sealing materials, and greatly shorten the material selection period.

[0074] 4) Wide adaptability. The present application can predict the service life of piston rings of different sizes under different conditions through overall design of the system. Even when necessary, relying on an external computer, through calculation control, a series of functions such as one-time installation and automatic calculation of results can be realized, and has a very strong functional additional effect.

[0075] Thus, the piston ring life under given conditions can be accurately tested, the piston ring wear detection is more convenient, the material selection cycle is shortened, and the effect is remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0076] Figure 1 is a schematic diagram of the working state of the present application;

[0077] Figure 2 is a schematic block diagram of the structure of the electronic device used in the present application.

[0078] The actual correspondence between the various designations and component names of the present application is as follows:

[0079] 10 - electronic device

[0080] 11 - processor 12 - memory 13 - input device 14 - output device

[0081] 20 - crank and connecting rod drive assembly 21 - power source 22 - crank 23 - connecting rod

[0082] 30 - temperature control assembly 31 - water tank 32 - water pump

[0083] 40 - pressure supply assembly 41 - high-pressure gas source DETAILED DESCRIPTION

[0084] For the sake of understanding, the specific structure and working method of the present application are described as follows:

[0085] The specific implementation structure of the present application can be referred to Figure 1 which includes a crank and connecting rod drive assembly 20 for driving the piston cylinder to work, a temperature control assembly 30 for temperature control of the cylinder cavity of the piston cylinder, and a pressure supply assembly 40 for providing working medium into the cylinder cavity of the piston cylinder. For the piston cylinder, one cylinder can be matched with multiple cylinder liners, and one connecting rod can be matched with multiple pistons, to further improve the operation flexibility and application range of the present application. Among them:

[0086] The appearance of the crank and connecting rod drive assembly 20 is shown in Figure 1 which includes a motor as a power source 21, the output shaft of the motor is coaxially connected to the output end of the crank 22, and the connecting rod 23 at the crank 22 is in power cooperation with the piston rod. When working, the motor generates rotary motion, which can drive the crank 22 to rotate, and then rely on the connecting rod 23 to realize the push-pull effect on the piston rod. The rotary speed of the motor is determined by the tachometer V; it is also possible to use a tachometer V instead of a tachometer sensor. In actual use, methods such as gear rack or cam drive can also be used, which can also achieve the reciprocating push effect on the piston rod.

[0087] The temperature control assembly 30 comprises a water tank 31 with a heater, which is connected to the cooling water jacket of the piston cylinder through an inlet flow channel and an outlet flow channel respectively, and a water pump 32 is arranged on the inlet flow channel or the outlet flow channel; the temperature control assembly further comprises a second temperature sensor TB for measuring the water temperature in the cooling water jacket.

[0088] Correspondingly, the pressure supply assembly 40 comprises a high-pressure gas source 41, and the outlet of the high-pressure gas source 41 is connected to the cylinder cavity of the piston cylinder through an outlet pipeline, and a second pressure sensor PB, a solenoid valve SV and a pressure reducing valve PRV are arranged on the outlet pipeline in sequence along the direction of the working medium; a solenoid blow-off valve PCV connected to the external atmosphere or equipment is also arranged on the outlet pipeline.

[0089] On the basis of the above structure, the present application further comprises a first temperature sensor TA for measuring the temperature of the cylinder cavity of the piston cylinder and a first pressure sensor PA for measuring the pressure of the cylinder cavity. Figure 1 In the structure shown, the cavity measured by the first temperature sensor TA is the inlet cavity of the cylinder cavity, that is, the working cavity mentioned above; the inlets of the pressure supply assembly are all located in the working cavity.

[0090] The present application further comprises a flow meter L for measuring the leakage amount of the leakage cavity; in Figure 1 In the structure shown, the working cavity is the return cavity of the cylinder cavity.

[0091] Further, the test method of the present application comprises the following steps:

[0092] S1. The high-pressure gas source is inflated to an appropriate pressure;

[0093] S2. The pressure of the outlet pipeline is adjusted to the simulation working condition pressure through the pressure reducing valve PRV;

[0094] S3. When the value collected by the first pressure sensor PA and the value collected by the second pressure sensor PB are within the set error range, a step operation can be performed;

[0095] S4. The heater is started, and after the water tank is heated to the set temperature, the water pump starts to operate, and after the second temperature sensor PB reaches the set temperature, the power source starts to move, according to the difference of the working mode, until the flow meter L reaches the set flow value and stops or the piston moves to the set working time and stops;

[0096] S5. After the above steps are completed, the following further calculations can be performed through linear simulation and nonlinear simulation:

[0097] A. The wear amount f of the piston ring after increasing the speed is obtained through linear simulation h1 , specifically including:

[0098] In the ideal gas compression process, the heat generated by friction is carried away by the cooling system. For a single-acting piston cylinder, the wear amount f of the piston rings per unit time is... h for:

[0099] f h =K(P1-P′)nl / 2H

[0100] in:

[0101] K is the wear coefficient of the piston ring;

[0102] P1 is the cylinder pressure;

[0103] P′ is the pressure in the leakage chamber, taken as atmospheric pressure;

[0104] n is the half-cycle of the reciprocating motion;

[0105] l represents the journey;

[0106] H represents the surface hardness of the piston ring;

[0107] In linear simulation, the rotational speed of the power source can be directly increased by a factor of y, thus obtaining the wear amount f after increasing the rotational speed. h1 for:

[0108] f h1 =K(P1-P′)ynl / 2H.

[0109] Based on the calculations in step A, the average wear coefficient K can be calculated, i.e.:

[0110] Where n≥2;

[0111] Subsequent calculation steps can use the average wear coefficient. Simply replace K with it.

[0112] It is easy to see that as the number of trials increases, then The more accurate and universal the value, the more the invention can continuously improve its accuracy through self-learning. Of course, in practical operation, it can also be achieved through d... H / d K d l / d K d fh / d K The average wear coefficient can be calculated using partial differential equations, graphs, or other mathematical methods, and the calculation formulas will not be elaborated here.

[0113] B. The wear of piston rings after pressure increase can be obtained through nonlinear simulation; specifically, the actual average air pressure P1 of the piston cylinder is first calculated, and then the pressure reducing valve PRV is adjusted to y times the design average air pressure P. yThe simulation is divided into two cases as follows:

[0114] (1) When calculated as an isothermal process, the wear rate f under the isothermal process can be obtained according to the following formula hw is:

[0115] f hw = K [P0ln(P2 / P0) - P'] nl / 2H

[0116] Wherein:

[0117] K is the wear coefficient of the piston ring;

[0118] P0 is the lowest pressure of the cylinder cavity during the test;

[0119] P2 is the set pressure value;

[0120] P' is the leakage cavity pressure, taking normal pressure;

[0121] n is the half cycle of reciprocating motion;

[0122] l is the stroke;

[0123] H is the surface hardness of the piston ring;

[0124] When the set pressure value is increased by y times, then the wear amount f hw after increasing the pressure is:

[0125] f hw '= K (P0ln(yP2 / P0) - P') nl / 2H;

[0126] (2) When calculated as an isentropic process, the wear rate f under the isentropic process can be obtained according to the following formula hs is:

[0127]

[0128] Wherein:

[0129] K is the wear coefficient of the piston ring;

[0130] P0 is the lowest pressure of the cylinder cavity during the test;

[0131] P2 is the set pressure value;

[0132] P' is the leakage cavity pressure, taking normal pressure;

[0133] n is the half cycle of reciprocating motion;

[0134] l is the stroke;

[0135] H is the surface hardness of the piston ring;

[0136] z is the process index;

[0137] When the set pressure value is increased by y times, then the wear amount f after increasing the pressure hs ' is:

[0138]

[0139] On the basis of the above calculation of step B, the wear coefficient average value of wear coefficient K can also be obtained, that is:

[0140] Wherein n≥2;

[0141] The corresponding calculation steps of step B can also be replaced by wear coefficient average value Instead of K.

[0142] In addition, in the isentropic process state, the wear rate λ can also be obtained as:

[0143]

[0144] So far, the present application has the following advantages:

[0145] 1. Using experimental methods instead of theoretical calculations improves the accuracy of piston ring wear prediction;

[0146] 2. Introducing the concept of piston ring wear rate and providing a calculation method reduces the test cycle and cost;

[0147] 3. Computer control and assisted calculation can be used to make piston ring wear testing faster than traditional testing;

[0148] 4. Using the design concept of serialization and parameter adjustment, the lubrication method, cylinder size, material, piston ring size, etc. are designed according to relevant standards, and the temperature and pressure can be quickly set, which facilitates users to perform piston ring wear testing under different specifications, models and environmental conditions.

[0149] Next, the electronic device used in the embodiments of the present application can be described with reference to Figure 2 ; The electronic device can be a mobile device itself or a single device independent of it, which can receive the collected input signal and send the selected target decision behavior to it.

[0150] As shown in Figure 2 , the electronic device 10 includes one or more processors 11 and corresponding memories 12.

[0151] The processor 11 can be a central processing unit or other form of processing unit having data processing and / or instruction executing capabilities, and can control other components in the electronic device 10 to perform desired functions. The memory 12 can include one or more computer program products that can include various forms of computer storage media, for example, volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM), cache memory, and / or the like. The non-volatile memory can include, for example, read-only memory (ROM), hard disk, flash memory, and / or the like. One or more computer program instructions can be stored on the computer storage media, which the processor 11 can execute to implement the decision-making behavior decision-making method of various embodiments of the present application described above and / or other desired functions.

[0152] In an example, the electronic device 10 can further include an input device 13 and an output device 14, which are interconnected through a bus system and / or other form of connection mechanism (not shown). The input device 13 can include, for example, a keyboard, a mouse, and / or the like. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and / or the like.

[0153] Of course, for simplicity, Figure 2 Only some of the components of the electronic device 10 related to the present application are shown in FIG. 1, and components such as buses, input / output interfaces, and the like are omitted. In addition, the electronic device 10 can include any other appropriate components according to specific application cases.

[0154] In addition to the above-described methods and devices, embodiments of the present application can also extend to computer program products including computer program instructions that, when executed by a processor, cause the processor to perform steps of the decision-making behavior decision-making method according to various embodiments of the present application described in the above “Exemplary Methods” section of the specification.

[0155] The computer program product can be written in any combination of one or more programming languages, including an object-oriented programming language such as Java, C++, and / or the like, and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code can execute entirely on the user’s computing device, partly on the user’s device, as a stand-alone software package, partly on the user’s computing device and partly on a remote computing device or entirely on the remote computing device or server.

[0156] In addition, embodiments of the present application can also be a readable computer storage medium, which stores computer program instructions, and the computer program instructions cause the processor to execute the steps of the decision-making method according to various embodiments of the present application when the processor runs the computer program instructions.

[0157] The computer storage medium can take any combination of one or more readable media. The readable medium can be a readable signal medium or a storage medium. The storage medium may, for example, include but is not limited to an electrical, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, device or apparatus, or any combination of the above. More specific examples (a non-exhaustive list) of the storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0158] Of course, the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0159] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0160] The technologies not described in detail in the present application are all known technologies.

Claims

1. A test method for a piston ring life testing device, characterized in that: The piston ring life testing device includes a crank-connecting rod drive assembly (20) for driving the piston cylinder, a temperature control assembly (30) for controlling the temperature of the piston cylinder cavity, and a pressure supply assembly (40) for supplying working medium to the piston cylinder cavity. The device also includes a first temperature sensor TA for measuring the cylinder cavity temperature and a first pressure sensor PA for measuring the cylinder cavity pressure. The cavity measured by the first temperature sensor TA is the working cavity, and the other cavity is the leakage cavity. The inlets of the first temperature sensor TA, the first pressure sensor PA, and the pressure supply assembly (40) are all located at the working cavity. The device also includes a flow meter L for measuring the leakage of the leakage cavity and a tachometer V for measuring the rotational speed of the power source (21) at the crank-connecting rod drive assembly (20). The temperature control component (30) includes a water tank (31) with a heater. The water tank (31) is connected to the cooling water jacket of the piston cylinder through an inlet flow channel and an outlet flow channel. A water pump (32) is installed on the inlet flow channel or the outlet flow channel. The temperature control component (30) also includes a second temperature sensor TB for measuring the water temperature inside the cooling water jacket. The pressure supply assembly (40) includes a high-pressure gas source (41), the outlet of the high-pressure gas source (41) is connected to the cylinder chamber of the piston cylinder via an outlet pipeline, and a second pressure sensor PB, a solenoid valve SV and a pressure reducing valve PRV are arranged sequentially along the direction of travel of the working medium on the outlet pipeline; an electromagnetic relief valve PCV connected to the external atmosphere or equipment is also arranged on the outlet pipeline. Includes the following steps: S1'. Inflate the high-pressure air source to a suitable pressure; S2'. Adjust the pressure in the outlet pipeline to the simulated operating pressure using the pressure reducing valve PRV; S3'. Once the values ​​collected by the first pressure sensor PA and the second pressure sensor PB are within the set error range, one step can be performed; S4'. The heater starts, and after the water tank is heated to the set temperature, the water pump starts to run. After the second temperature sensor TB reaches the set temperature, the power source starts to move until the flow meter L reaches the set flow value and then stops or the piston moves to the set working time and then stops. S5'. The wear of the piston rings after increasing the pressure is obtained through nonlinear simulation. Specifically, the actual average air pressure P1 of the piston cylinder is first calculated, and then the pressure reducing valve PRV is adjusted to y times the design average air pressure P. y To simulate and calculate according to the isentropic process, the wear amount under the isentropic process can be obtained using the following formula. for: in: K is the wear coefficient of the piston ring; This represents the minimum pressure in the cylinder cavity during the test. To set the pressure value; The pressure in the leakage chamber is taken as atmospheric pressure; n is the half-cycle of the reciprocating motion; For the itinerary; H represents the surface hardness of the piston ring; z is the process index; When the set pressure value is increased by a factor of y, the amount of wear after increasing the pressure will be... for: ； In the ideal gas compression process, the heat generated by friction is carried away by the cooling system. For a single-acting piston cylinder, the wear of the piston rings per unit time is... for: in: K is the wear coefficient of the piston ring; This refers to the cylinder pressure. The pressure in the leakage chamber is taken as atmospheric pressure; n is the half-cycle of the reciprocating motion; For the itinerary; H represents the surface hardness of the piston ring; Under isentropic process conditions, the wear ratio λ can be obtained as: 。 2. The test method of the piston ring life testing device according to claim 1, characterized in that: The power source (21) is an electric motor. The output shaft of the power source (21) is coaxially connected to the output end of the crank (22). The connecting rod (23) at the crank (22) and the piston rod form a power engagement.

3. An electronic device, characterized in that, The device includes a processor, an input device, an output device, and a memory, which are connected in sequence. The memory is used to store a computer program, which includes program instructions. The processor is configured to call the program instructions to execute the test method as described in claim 1.

4. A storage medium, characterized in that, The storage medium stores a computer program, which includes program instructions that, when executed by a processor, cause the processor to perform the test method as described in claim 1.

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