A test method for the life of aviation hydraulic linear reciprocating rubber and plastic seals

Abstract

This invention relates to the field of rubber and plastic sealing technology, specifically to a life test method for aerospace hydraulic linear reciprocating rubber and plastic seals. The method includes: acquiring statistical data on operating conditions throughout the entire life cycle of the linear reciprocating rubber and plastic seal; the statistical data includes multiple sets of reciprocating parameters; dividing the statistical data into a first number of first parameter sets and a second number of second parameter sets according to a decreasing reciprocating frequency; assigning one set of reciprocating parameters from each first parameter set to a test parameter set; assigning one set of reciprocating parameters from each second parameter set to a test parameter set; recording the life load spectrum based on the test parameter sets; and conducting a linear reciprocating rubber and plastic seal test for a preset test duration based on the life load spectrum. This solves the problems of limited number of operating conditions and low test reliability in existing linear reciprocating rubber and plastic seal life test methods.

Description

Technical Field

[0001] This invention relates to the field of rubber and plastic sealing technology, and more specifically, to a method for testing the lifespan of aviation hydraulic linear reciprocating rubber and plastic seals. Background Technology

[0002] Hydraulic products are widely used in the aviation industry, such as nose wheel steering actuators, servo motors, and hydraulic oil tanks. These hydraulic products typically incorporate a large number of linear reciprocating seals. To ensure the linear reciprocating rubber and plastic seals in aviation hydraulic products have a certain lifespan, life verification tests need to be conducted before their application.

[0003] Existing life testing methods for linear reciprocating rubber and plastic seals generally only conduct life tests under a single operating condition, without considering the distribution of various operating conditions throughout the entire life cycle. This results in life tests failing to simulate the actual application of rubber and plastic seals in aerospace hydraulic products. Consequently, the test results from single-condition life tests cannot effectively guide the application of rubber and plastic seals in aerospace hydraulic products. Therefore, there is an urgent need for a highly reliable life testing method for linear reciprocating rubber and plastic seals that can reflect multiple operating conditions. Summary of the Invention

[0004] To address the issues of limited testing conditions and low reliability in existing linear reciprocating rubber-plastic seal life testing methods, this invention provides a method for testing the life of aerospace hydraulic linear reciprocating rubber-plastic seals, comprising:

[0005] Obtain statistical data on operating conditions throughout the entire life cycle of a linear reciprocating rubber-plastic seal; the statistical data on operating conditions includes multiple sets of reciprocating parameters; each set of reciprocating parameters includes reciprocating frequency, reciprocating stroke, statistical reciprocating number, and operating condition parameters; the operating condition parameters include the seal's oil pressure, oil temperature, and ambient temperature;

[0006] Based on the decreasing reciprocating frequency, the operating condition statistics are sequentially divided into a first number of first parameter sets and a second number of second parameter sets; wherein the first number is greater than the second number; the number of reciprocating parameters contained in each first parameter set is a first capacity; the number of reciprocating parameters contained in each second parameter set is a second capacity; the first capacity is less than the second capacity; the sum of the first capacity of the first number of first parameter sets is less than 50% of the total number of reciprocating parameters in the operating condition statistics.

[0007] In each of the first parameter sets, one set of the reciprocating parameters is assigned to the test parameter set;

[0008] In each of the second parameter sets, one set of the reciprocating parameters is assigned to the test parameter set;

[0009] Record the lifetime load spectrum according to the set of test parameters;

[0010] A linear reciprocating rubber-plastic seal test of a preset test duration is conducted based on the life load spectrum.

[0011] Optionally, in each of the first parameter sets, dividing one set of the reciprocating parameters into the experimental parameter set includes:

[0012] In each of the first parameter sets, the reciprocating parameter with the highest number of statistical reciprocations is assigned to the experimental parameter set.

[0013] Optionally, the step of assigning a set of reciprocating parameters to the test parameter set in each of the second parameter sets includes:

[0014] In each of the second parameter sets, the reciprocating parameter with the longest reciprocating stroke is assigned to the test parameter set.

[0015] Optionally, recording the lifetime load spectrum according to the test parameter set includes:

[0016] The reciprocating stroke and the reciprocating frequency in the test parameter set are recorded in the lifetime load spectrum;

[0017] The amplification factor of the reciprocating parameters is determined according to the following formula:

[0018] ;

[0019] Where q is the magnification factor; n is the number of reciprocating parameters in the operating condition statistics; The reciprocating stroke of the i-th reciprocating parameter in the operating condition statistics; The statistical reciprocating number is the i-th reciprocating parameter in the working condition statistics; m is the number of reciprocating parameters in the test parameter set; The reciprocating stroke of the i-th reciprocating parameter in the set of test parameters; The statistical number of reciprocating cycles for the i-th reciprocating parameter in the experimental parameter set; i is a positive integer;

[0020] The statistical number of reciprocating cycles in each group of reciprocating parameters in the experimental parameter set is adjusted to the magnification factor to form a reference number of reciprocating cycles;

[0021] The reference number of cycles is recorded in the lifetime load spectrum.

[0022] Optionally, the linear reciprocating rubber-plastic seal test for a preset test duration based on the life load spectrum includes:

[0023] The number of test cycles for each set of reciprocating parameters in the life load spectrum within a preset test duration is calculated using the following formula:

[0024] Where Ki is the percentage of the number of reciprocating cycles for the i-th reciprocating parameter in the operating condition statistics;

[0025] ;in, The number of test cycles for the i-th reciprocating parameter in the life load spectrum; The proportion of the number of reciprocating cycles for the i-th reciprocating parameter in the set of test parameters; y is the reciprocating frequency of the i-th reciprocating parameter in the test parameter set; y is the preset test duration;

[0026] A linear reciprocating rubber-plastic seal test of a preset test duration is performed based on the life load spectrum until each set of reciprocating parameters reaches the preset test reciprocating number within the preset test duration.

[0027] Optionally, recording the lifetime load spectrum according to the test parameter set further includes:

[0028] The oil pressure in the multiple reciprocating parameters in the test parameter set is determined as the rated pressure in each test process;

[0029] The rated pressure is recorded in the life load spectrum.

[0030] Optionally, the aviation hydraulic linear reciprocating rubber and plastic seal life test method further includes:

[0031] The life load spectrum is recorded based on the operating parameters of the hydraulic product; the operating parameters include oil temperature and ambient temperature.

[0032] Optionally, recording the life load spectrum based on the operating parameters of the hydraulic product includes:

[0033] The hydraulic product's oil temperature is selected sequentially in descending order of the first working time; the first working time is the working time of the hydraulic product under each oil temperature condition; the first working time is equal to the sum of the first quantity and the second quantity.

[0034] The selected oil temperature is recorded in the lifetime load spectrum; the oil temperature corresponds one-to-one with the reciprocating parameter, and the first working duration of the oil temperature is sorted in the same order as the reciprocating frequency of the corresponding reciprocating parameter.

[0035] Optionally, recording the life load spectrum based on the operating parameters of the hydraulic product further includes:

[0036] The ambient temperatures of the second operating conditions of the hydraulic product are selected sequentially in descending order of the second operating duration; the second operating duration is the operating time of the hydraulic product under each ambient temperature condition; the second operating condition number is equal to the sum of the first number and the second number.

[0037] Optionally, the aviation hydraulic linear reciprocating rubber and plastic seal life test method further includes:

[0038] Repeat the steps of performing a linear reciprocating rubber and plastic seal test for a preset test duration based on the life load spectrum until the preset number of cycles is reached.

[0039] Conduct a leakage test.

[0040] To address the issues of limited testing conditions and low reliability in existing linear reciprocating rubber and plastic seal life testing methods, this invention offers the following advantages:

[0041] This invention summarizes and merges the full-life-cycle operating conditions of hydraulic rubber and plastic seals, improving verification efficiency while ensuring effective simulation of actual operating conditions throughout the entire life-cycle, thus providing a valid basis for the application of rubber and plastic seals. By sorting and filtering according to reciprocating frequency and limiting the capacity and number of different parameter sets, it achieves high objectivity and reliability. Attached Figure Description

[0042] Figure 1 A schematic flowchart of an embodiment of an aviation hydraulic linear reciprocating rubber and plastic seal life test method is shown;

[0043] Figure 2 A schematic diagram of the structure of a Type I sealing test fixture according to one embodiment is shown;

[0044] Figure 3 A cross-sectional view of a type I sealing test fixture according to one embodiment is shown;

[0045] Figure 4 A cross-sectional view of a Type II sealing test fixture according to one embodiment is shown.

[0046] Reference numerals: 10. Type I sealing test fixture; 11. Type I sealing test cylinder; 12. Piston; 13. Type I linear reciprocating rubber-plastic seal; 20. Type II sealing test fixture; 21. Type II sealing test cylinder; 22. Piston rod; 23. Type II linear reciprocating rubber-plastic seal. Detailed Implementation

[0047] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0048] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0049] To address the issues of limited testing conditions and low reliability in existing linear reciprocating rubber-plastic seal life testing methods, this invention provides a method for testing the life of aerospace hydraulic linear reciprocating rubber-plastic seals, such as... Figure 1 As shown, the test method for the life of aviation hydraulic linear reciprocating rubber and plastic seals includes steps S10-S60, which are explained in detail below:

[0050] Step S10: Obtain the operating condition statistics for the entire life cycle of the linear reciprocating rubber and plastic seal. The collection and statistics of these operating condition data typically rely on actual aircraft service data of aviation hydraulic products, ground simulation test data, and industry-typical operating condition databases. This covers multiple sets of reciprocating parameters for the linear reciprocating rubber and plastic seal under all actual service scenarios throughout its life cycle. It also integrates operating condition change data corresponding to core service indicators of aviation hydraulic products, such as total flight hours and number of takeoffs and landings. The operating condition statistics include multiple sets of reciprocating parameters. Each set of reciprocating parameters includes reciprocating frequency, reciprocating stroke, statistical reciprocating number, and operating condition parameters. These operating condition parameters include the seal's oil pressure, oil temperature, and ambient temperature.

[0051] Step S20: According to the decreasing reciprocating frequency, the working condition statistics are divided into a first number of first parameter sets and a second number of second parameter sets; wherein, the first number is greater than the second number; the number of reciprocating parameters contained in each first parameter set is the first capacity; the number of reciprocating parameters contained in each second parameter set is the second capacity; the first capacity is less than the second capacity; since high reciprocating frequency has a significant impact on the sealing life of linear reciprocating rubber and plastic in practical applications, by setting the total first capacity of the first number of first parameter sets to be less than 50% of the total number of reciprocating parameters in the working condition statistics, the reciprocating parameters in the selected first capacity are of high reciprocating frequency; since the working condition statistics are arranged in decreasing reciprocating frequency order, the setting of the first number being greater than the second number can increase the proportion of the high reciprocating frequency first parameter sets in all the divided parameter sets; and the setting of the first number being greater than the second number is compatible with the setting of the first capacity being less than the second capacity, and this is conducive to achieving the setting that the total first capacity of the first number of first parameter sets is less than 50% of the total number of reciprocating parameters in the working condition statistics. That is, through the above settings, the working condition statistics of the Type I sealing test fixture 10 throughout its entire life cycle obtained in step S10 are divided into a first parameter set with high reciprocating frequency and a second parameter set with low reciprocating frequency.

[0052] Step S30: In each first parameter set, one set of reciprocating parameters is assigned to the experimental parameter set; this allows the first number of reciprocating parameters with high reciprocating frequencies to be assigned to the experimental parameter set, thus incorporating the significant influencing factor of high reciprocating frequency into the experiment, thereby improving the reliability of the experiment.

[0053] Step S40: In each second parameter set, assign one set of reciprocating parameters to the test parameter set; this allows the second number of low-frequency reciprocating parameters to be assigned to the test parameter set. Thus, the test parameter set is formulated based on a division strategy that prioritizes high-frequency reciprocating parameters and covers the entire lifespan, using statistical data from various reciprocating frequencies throughout the entire lifespan.

[0054] Step S50: Record the life load spectrum according to the test parameter set, as shown in Table 1:

[0055] Table 1 - Life Load Spectrum of Linear Reciprocating Rubber and Plastic Seals

[0056]

[0057] It should be understood that the number of reciprocating parameters in Table 1 is 5 sets as an example, and any number such as 6 sets, 8 sets, 12 sets, etc. can be set according to actual needs.

[0058] Step S60: Conduct a linear reciprocating rubber-plastic seal test with a preset test duration based on the life load spectrum. This allows for the linear reciprocating rubber-plastic seal test by presetting the test duration and setting various reciprocating parameters. By selecting dense reciprocating parameters from statistical data of high-frequency operating conditions, and encompassing reciprocating parameters across various frequency ranges, the lifespan of the linear reciprocating rubber-plastic seal under multiple operating conditions can be reflected, resulting in test results with high objectivity and reliability.

[0059] In addition, the linear reciprocating rubber-plastic seal test in step S60 can be performed using either Type I seal test fixture 10 or Type II seal test fixture 20. For example... Figure 2 and Figure 3 As shown, the Type I sealing test fixture 10 includes a Type I sealing test cylinder 11, a piston 12, and a Type I linear reciprocating rubber-plastic seal 13; the piston 12 is slidably disposed inside the Type I sealing test cylinder 11; the Type I linear reciprocating rubber-plastic seal 13 is disposed between the piston 12 and the Type I sealing test cylinder 11 to achieve a seal between the piston 12 and the Type I sealing test cylinder 11; the piston 12 reciprocates inside the Type I sealing test cylinder 11.

[0060] Appendix Figure 3 This is a linear reciprocating sealing test fixture for a type I seal (hole seal). The type I linear reciprocating rubber and plastic seal 13 is installed on the piston 12 to achieve sealing of the hole. The type I linear reciprocating rubber and plastic seal 13 moves linearly with the piston 12.

[0061] Appendix Figure 4 The Type II seal test fixture 20 is a linear reciprocating seal test fixture for Type II seals (shaft seals). The Type II seal test fixture 20 includes a Type II seal test cylinder 21, a piston rod 22, and a Type II linear reciprocating rubber-plastic seal 23. The Type II linear reciprocating rubber-plastic seal 23 is installed and fixed on the inner wall of the Type II seal test cylinder 21 to seal the piston rod 22.

[0062] Further, step S30 includes step S31: In each first parameter set, the reciprocating parameter with the highest number of reciprocating strokes is assigned to the experimental parameter set. Since the first parameter set has a high reciprocating frequency, the number of reciprocating strokes is the most important reference factor besides the reciprocating frequency. Furthermore, when the reciprocating frequency and reciprocating distance are the same in two sets of data, the number of reciprocating strokes can reflect the duration of the actuation. Therefore, assigning the reciprocating parameter with the highest number of reciprocating strokes to the experimental parameter set, that is, assigning the reciprocating parameter with the longest actuation time to the experimental parameter set, can further improve the reliability of the experiment.

[0063] Further, step S40 includes step S41: In each second parameter set, the reciprocating parameter with the longest reciprocating stroke is assigned to the test parameter set. Since the reciprocating frequency of the second parameter set is low, the length of the reciprocating stroke can reflect the actuation speed to a certain extent. Therefore, a longer reciprocating stroke, i.e., a faster speed, is a more significant factor affecting the lifespan of linear reciprocating rubber-plastic seals. Assigning the reciprocating parameter with the longest reciprocating stroke to the test parameter set further improves the reliability of the test. Therefore, in this embodiment, the reciprocating parameter with the most reciprocating strokes is preferred when the reciprocating frequency ranking is higher; when the reciprocating frequency ranking is lower, the reciprocating parameter with a longer reciprocating stroke is preferred. Different screening strategies used in different reciprocating frequency ranges further improve the scientific validity and reliability of the test parameter set.

[0064] Furthermore, step S50 includes steps S51-S54, which are explained in detail below:

[0065] Step S51: Record the reciprocating stroke and reciprocating frequency from the test parameter set into the life load spectrum;

[0066] Step S52: Determine the amplification factor of the reciprocating parameters according to the following formula:

[0067] ;

[0068] Where q is the magnification factor; n is the number of reciprocating parameters in the operating condition statistics; The reciprocating stroke of the i-th reciprocating parameter in the operating condition statistics; is the number of reciprocating cycles for the i-th reciprocating parameter in the working condition statistics; m is the number of reciprocating parameters in the test parameter set; The reciprocating stroke of the i-th reciprocating parameter in the test parameter set; Let i be the number of reciprocating cycles for the i-th reciprocating parameter in the experimental parameter set; i is a positive integer.

[0069] Step S53: Adjust the statistical number of reciprocating cycles in each group of reciprocating parameters in the experimental parameter set to the magnification factor to form the reference number of reciprocating cycles;

[0070] Step S54: Record the reference number of cycles into the life load spectrum.

[0071] By selecting representative reciprocating parameters from different life cycles, calculating the magnification factor, and then adjusting the statistical reciprocating number to the magnification factor to form a reference reciprocating number, the experiment can be conducted. This avoids the problem of excessive time consumption caused by using all reciprocating parameters in the experiment. At the same time, the setting of the magnification factor makes this experiment closer to the actual application process, further improving the reliability of the experiment.

[0072] Furthermore, step S60 includes steps S61-S62, which are explained in detail below:

[0073] Step S61: Calculate the number of test cycles for each set of reciprocating parameters in the life load spectrum within the preset test duration according to the following formula:

[0074] Where Ki is the percentage of the number of reciprocating cycles for the i-th reciprocating parameter in the working condition statistics.

[0075] ;in, The number of experimental cycles for the i-th reciprocating parameter in the life load spectrum; The percentage of reciprocating cycles for the i-th reciprocating parameter in the experimental parameter set; Let be the reciprocating frequency of the i-th reciprocating parameter in the test parameter set; y is the preset test duration. The proportion of reciprocating frequency reflects, to some extent, the proportion of operating time. By calculating the proportion of reciprocating frequency for each group of reciprocating parameters in the working condition statistics, an accurate proportional reference can be provided for calculating the number of reciprocating frequencies in the life load spectrum, thereby improving the test reliability of the life load spectrum.

[0076] Step S62: Conduct a linear reciprocating rubber-plastic seal test for a preset test duration based on the life load spectrum until each set of reciprocating parameters reaches the preset number of reciprocations within the preset test duration. Steps S61 and S62 allow for testing of reciprocating parameters with different numbers of reciprocations, and the number of reciprocations is highly correlated with actual operating conditions, thus further improving the reliability of the test.

[0077] Furthermore, step S50 also includes steps S55-S56, which are explained in detail below:

[0078] Step S55: Determine the oil pressure in the multiple reciprocating parameters of the test parameter set as the rated pressure in each test process;

[0079] Step S56: Record the rated pressure into the life load spectrum.

[0080] This allows the influence of the oil pressure of the grease used for lubrication or sealing testing during the use of the Type I seal test fixture 10 to be included in the test, further improving the reliability of the life test.

[0081] Furthermore, the test method for the life of linear reciprocating rubber and plastic seals in aviation hydraulic systems also includes step S70: recording the life load spectrum based on the operating parameters of the hydraulic product; the operating parameters include oil temperature and ambient temperature. This allows for testing the service life of hydraulic products under different oil temperatures and ambient temperatures, thus providing useful guidance for adjusting the reciprocating parameters.

[0082] Furthermore, step S70 includes steps S71-S72, which are explained in detail below:

[0083] Step S71: Select the oil temperature of the first working condition number of the hydraulic product in descending order of the first working time; the first working time is the working time of the hydraulic product under each oil temperature condition; the first working condition number is equal to the sum of the first quantity and the second quantity.

[0084] Step S72: Record the selected oil temperature in the life load spectrum; the oil temperature corresponds one-to-one with the reciprocating parameters, and the first working duration of the oil temperature is sorted in the same order as the reciprocating frequency of the corresponding reciprocating parameters. In this way, the most commonly used oil temperature in practical applications is linked with high reciprocating frequency in this experiment, thus making the oil temperature parameter in this experiment highly reliable.

[0085] Furthermore, step S70 also includes step S73: selecting the ambient temperature of the second operating condition number of the hydraulic product in descending order of the second operating duration; the second operating duration is the operating time of the hydraulic product under each ambient temperature condition; the second operating condition number is equal to the sum of the first and second quantities. By incorporating the most commonly used ambient temperature into the test, the ambient temperature parameter of this test can be made more reliable.

[0086] Furthermore, the test method for the life of aviation hydraulic linear reciprocating rubber and plastic seals also includes steps S80-S90, which are explained in detail below:

[0087] Step S80: Repeat the steps of performing a linear reciprocating rubber and plastic seal test for a preset test duration based on the life load spectrum until the preset number of cycles is reached; by performing multiple cycles of the test, the randomness of the test can be reduced, thereby further improving the reliability of the test.

[0088] Step S90: Conduct a leakage test. This will determine whether the Type I sealing test fixture 10 performs well after the life test, thus providing improvement suggestions based on the operating condition data in practical applications.

[0089] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A method for testing the life of aviation hydraulic linear reciprocating rubber and plastic seals, characterized in that, The test method for the life of aviation hydraulic linear reciprocating rubber and plastic seals includes: Obtain statistical data on operating conditions throughout the entire life cycle of a linear reciprocating rubber-plastic seal; the statistical data on operating conditions includes multiple sets of reciprocating parameters; each set of reciprocating parameters includes reciprocating frequency, reciprocating stroke, statistical reciprocating number, and operating condition parameters; the operating condition parameters include the seal's oil pressure, oil temperature, and ambient temperature; Based on the decreasing reciprocating frequency, the operating condition statistics are sequentially divided into a first number of first parameter sets and a second number of second parameter sets; wherein the first number is greater than the second number; the number of reciprocating parameters contained in each first parameter set is a first capacity; the number of reciprocating parameters contained in each second parameter set is a second capacity; the first capacity is less than the second capacity; the sum of the first capacity of the first number of first parameter sets is less than 50% of the total number of reciprocating parameters in the operating condition statistics. In each of the first parameter sets, one set of the reciprocating parameters is assigned to the test parameter set; In each of the second parameter sets, one set of the reciprocating parameters is assigned to the test parameter set; Record the lifetime load spectrum according to the set of test parameters; A linear reciprocating rubber-plastic seal test of a preset test duration is performed based on the life load spectrum. The process of recording the lifetime load spectrum based on the test parameter set includes: The reciprocating stroke and the reciprocating frequency in the test parameter set are recorded in the lifetime load spectrum; The amplification factor of the reciprocating parameters is determined according to the following formula: ； Where q is the magnification factor; n is the number of reciprocating parameters in the operating condition statistics; The reciprocating stroke of the i-th reciprocating parameter in the operating condition statistics; The statistical reciprocating number is the i-th reciprocating parameter in the working condition statistics; m is the number of reciprocating parameters in the test parameter set; The reciprocating stroke of the i-th reciprocating parameter in the set of test parameters; The statistical number of reciprocating cycles for the i-th reciprocating parameter in the experimental parameter set; i is a positive integer; The statistical number of reciprocating cycles in each group of reciprocating parameters in the experimental parameter set is adjusted to the magnification factor to form a reference number of reciprocating cycles; The reference number of cycles is recorded in the lifetime load spectrum.

2. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, In each of the first parameter sets, a group of the reciprocating parameters is assigned to the experimental parameter set, including: In each of the first parameter sets, the reciprocating parameter with the highest number of statistical reciprocations is assigned to the experimental parameter set.

3. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, In each of the second parameter sets, assigning one set of the reciprocating parameters to the experimental parameter set includes: In each of the second parameter sets, the reciprocating parameter with the longest reciprocating stroke is assigned to the test parameter set.

4. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, The linear reciprocating rubber-plastic seal test for a preset test duration based on the life load spectrum includes: The number of test cycles for each set of reciprocating parameters in the life load spectrum within a preset test duration is calculated using the following formula: Where Ki is the percentage of the number of reciprocations of the i-th reciprocating parameter in the working condition statistics; ;in, The number of test cycles for the i-th reciprocating parameter in the life load spectrum; The proportion of the number of reciprocating cycles for the i-th reciprocating parameter in the set of test parameters; y is the reciprocating frequency of the i-th reciprocating parameter in the test parameter set; y is the preset test duration; A linear reciprocating rubber-plastic seal test of a preset test duration is performed based on the life load spectrum until each set of reciprocating parameters reaches the preset test reciprocating number within the preset test duration.

5. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, The process of recording the lifetime load spectrum based on the test parameter set further includes: The oil pressure in the multiple reciprocating parameters in the test parameter set is determined as the rated pressure in each test process; The rated pressure is recorded in the life load spectrum.

6. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, The aviation hydraulic linear reciprocating rubber and plastic seal life test method also includes: The life load spectrum is recorded based on the operating parameters of the hydraulic product; the operating parameters include oil temperature and ambient temperature.

7. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 6, characterized in that, The process of recording the life load spectrum based on the operating parameters of the hydraulic product includes: The hydraulic product's oil temperature is selected sequentially in descending order of the first working time; the first working time is the working time of the hydraulic product under each oil temperature condition; the first working time is equal to the sum of the first quantity and the second quantity. The selected oil temperature is recorded in the lifetime load spectrum; the oil temperature corresponds one-to-one with the reciprocating parameter, and the first working duration of the oil temperature is sorted in the same order as the reciprocating frequency of the corresponding reciprocating parameter.

8. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 7, characterized in that, The method of recording the life load spectrum based on the operating parameters of the hydraulic product further includes: The ambient temperatures of the second operating conditions of the hydraulic product are selected sequentially in descending order of the second operating duration; the second operating duration is the operating time of the hydraulic product under each ambient temperature condition; the second operating condition number is equal to the sum of the first number and the second number.

9. The method for testing the life of an aviation hydraulic linear reciprocating rubber-plastic seal according to claim 1, characterized in that, The aviation hydraulic linear reciprocating rubber and plastic seal life test method also includes: Repeat the steps of performing a linear reciprocating rubber and plastic seal test for a preset test duration based on the life load spectrum until the preset number of cycles is reached. Conduct a leakage test.

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