A data management method and system for mechanical seal detection

Abstract

The present application relates to the technical field of data processing, in particular to a data management method and system for mechanical seal detection, comprising: obtaining a first curve and a second curve of a mechanical seal device; obtaining all segments corresponding to the first curve and the second curve, determining a stable wear stage by using the leakage amount and the vibration value corresponding to each segment; obtaining an initial running-in stage and a late failure stage by using the stable wear stage; obtaining a sealing performance performance value by using the leakage amount and the vibration value at all times in the initial running-in stage; obtaining a wear performance performance value according to the experimental time length, the leakage amount and the vibration value of the earliest two adjacent times in the late failure stage, and the leakage amount and the vibration value of the latest two adjacent times; and visually displaying the sealing performance performance value and the wear performance performance value. The performance evaluation of the mechanical seal device is more in line with the actual performance, thereby improving the data management accuracy.

Description

Technical Field

[0001] This invention relates to the field of data processing technology, and specifically to a data management method and system for mechanical seal testing. Background Technology

[0002] During the experimental phase, researchers often monitor the leakage and end-face vibration of mechanical seal devices to obtain a large amount of data. This data can be used to evaluate the sealing performance and wear resistance of mechanical seal devices, facilitate early warning of failure risks and optimization of seal pairing selection, and provide key basis for extending equipment life and improving operational reliability.

[0003] Existing problem: Currently, researchers evaluate different performance characteristics based on data obtained from leakage and end-face vibration of the mechanical seal device throughout the entire experimental phase. However, they have not considered the impact of changes in leakage and end-face vibration at different stages of the experiment on the performance evaluation. This results in inaccurate evaluation of the sealing performance and wear resistance of the mechanical seal device, thereby reducing the accuracy of data management. Summary of the Invention

[0004] This invention provides a data management method and system for mechanical seal testing to solve existing problems.

[0005] The present invention provides a data management method and system for mechanical seal testing, which adopts the following technical solution:

[0006] One embodiment of the present invention provides a data management method for mechanical seal testing, the method comprising the following steps:

[0007] Obtain the first curve and the second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device;

[0008] Obtain all segments corresponding to the first and second curves. Using the leakage volume and vibration value corresponding to each segment, determine the stable wear stages of the first and second curves, specifically including:

[0009] Cluster the first curve to obtain all segments corresponding to the first curve; based on all segments corresponding to the first curve, obtain all segments corresponding to the second curve; wherein, all segments corresponding to the first curve and all segments corresponding to the second curve have a one-to-one correspondence.

[0010] By using the leakage volume and vibration value corresponding to each segment, the stability of the leakage volume data change and the stability of the vibration data change of each segment are obtained.

[0011] The expression for the degree of low stability of leakage data changes in each segment is as follows:

[0012]

[0013] Indicates segmentation The leakage data showed low stability. Indicates segmentation The number of time intervals within a time interval Indicates segmentation Every moment within The amount of leakage, Indicates segmentation The average leakage amount at all times within the time frame. Indicates segmentation The maximum leakage volume at all times;

[0014] Replace the leakage data in the expression for the low stability of leakage data change in each segment with vibration data to obtain the low stability of vibration data change in each segment.

[0015] Based on the stability of leakage data and vibration data changes in each segment, a comparative performance value of stability for each segment is obtained.

[0016] The expression for the low stability performance value of each segment is as follows:

[0017]

[0018] Indicates segmentation The performance value of low stability is compared. This represents all segments obtained The maximum value in, Indicates segmentation The normalized leakage data showed low stability. Indicates segmentation The normalized vibration data shows a low degree of stability.

[0019] Obtain the normalized value of the low stability comparison performance value of each segment, and determine the segments whose normalized value is greater than or equal to the preset performance value threshold as candidate segments;

[0020] By using the low stability comparison performance value of each candidate segment and the time length of each candidate segment, the degree of conformity of the stable wear stage of each candidate segment is obtained, and the candidate segment corresponding to the maximum value of the degree of conformity of the stable wear stage is determined as the stable wear stage of the first curve and the second curve.

[0021] The expression for the degree of conformity of the stable wear stage for each candidate segment is as follows:

[0022]

[0023] Indicates segmentation The degree of conformity of the stable wear stage Indicates segmentation The length of time;

[0024] By utilizing the stable wear stages of the first and second curves, the initial break-in stage and the late failure stage of the first and second curves can be obtained.

[0025] By utilizing the leakage and vibration values ​​at all times during the initial break-in period, the sealing performance values ​​of the mechanical seal device are obtained.

[0026] The expression for the sealing performance value of the mechanical seal device is as follows:

[0027]

[0028] Indicates mechanical seal device The sealing performance value, Indicates the initial break-in period The maximum value of the vibration at all times. Indicates the initial break-in period The number of moments in time Indicates the initial break-in period Every moment The amount of leakage, Indicates the stable wear stage The average leakage amount at all times;

[0029] The test duration of the mechanical seal device is obtained. Based on the test duration, the leakage and vibration values ​​at the two earliest and two latest adjacent moments in the late failure stage are used to obtain the wear performance values ​​of the mechanical seal device, specifically including:

[0030] The sum of the durations of the initial break-in phase, the stable wear phase, and the late failure phase is determined as the experimental time length of the mechanical seal device.

[0031] Calculate the slope of the first leakage change on the first curve and the slope of the first vibration value change on the second curve for the two earliest adjacent moments in the late failure stage.

[0032] Calculate the slope of the second leakage rate change on the first curve and the slope of the second vibration value change on the second curve for the two latest adjacent moments in the late failure stage.

[0033] The product of the slope of the first leakage rate change and the slope of the first vibration value change is determined as the wear rate of the two earliest adjacent moments in the late failure stage.

[0034] The product of the slope of the second leakage rate change and the slope of the second vibration value change is determined as the wear rate of the two latest adjacent moments in the late failure stage.

[0035] The wear performance value of the mechanical seal device is determined by using the difference between the wear rates of the two earliest and two latest adjacent moments in the late failure stage, and the experimental time length of the mechanical seal device.

[0036] The expression for the wear performance value of a mechanical seal device is as follows:

[0037]

[0038] Indicates mechanical seal device Wear performance values, Indicates the two latest adjacent times , The wear rate, Indicates the earliest two adjacent times , The wear rate, Indicates mechanical seal device The length of the experiment;

[0039] The sealing performance and wear performance values ​​of the mechanical seal device are displayed visually.

[0040] Furthermore, the specific steps for clustering the first curve to obtain all segments corresponding to the first curve, and obtaining all segments corresponding to the second curve based on all segments corresponding to the first curve, are as follows:

[0041] Cluster the data points in the first curve to obtain all cluster ranges, and use each cluster range as a segment of the first curve to obtain all segments corresponding to the first curve;

[0042] Use the x-coordinate of each segment of the first curve as the x-coordinate of each segment of the second curve, and then segment the second curve to obtain all the segments corresponding to the second curve.

[0043] Furthermore, the specific steps for obtaining the initial break-in stage and the late failure stage of the first and second curves using the stable wear stage of the first and second curves are as follows:

[0044] The curve before the stable wear stage in the first curve and the second curve is defined as the initial break-in stage of the first curve and the second curve.

[0045] The curve following the stable wear stage in the first and second curves is defined as the late failure stage of the first and second curves.

[0046] One embodiment of the present invention provides a data management system for mechanical seal testing, the system comprising the following modules:

[0047] The data acquisition module is used to acquire the first curve and the second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device.

[0048] The data analysis module is used to acquire all segments corresponding to the first and second curves. Using the leakage volume and vibration value corresponding to each segment, it determines the stable wear stage of the first and second curves, specifically including:

[0049] Cluster the first curve to obtain all segments corresponding to the first curve; based on all segments corresponding to the first curve, obtain all segments corresponding to the second curve; wherein, all segments corresponding to the first curve and all segments corresponding to the second curve have a one-to-one correspondence.

[0050] By using the leakage volume and vibration value corresponding to each segment, the stability of the leakage volume data change and the stability of the vibration data change of each segment are obtained.

[0051] The expression for the degree of low stability of leakage data changes in each segment is as follows:

[0052]

[0053] Indicates segmentation The leakage data showed low stability. Indicates segmentation The number of time intervals within a time interval Indicates segmentation Every moment within The amount of leakage, Indicates segmentation The average leakage amount at all times within the time frame. Indicates segmentation The maximum leakage volume at all times;

[0054] Replace the leakage data in the expression for the low stability of leakage data change in each segment with vibration data to obtain the low stability of vibration data change in each segment.

[0055] Based on the stability of leakage data and vibration data changes in each segment, a comparative performance value of stability for each segment is obtained.

[0056] The expression for the low stability performance value of each segment is as follows:

[0057]

[0058] Indicates segmentation The performance value of low stability is compared. This represents all segments obtained The maximum value in, Indicates segmentation The normalized leakage data showed low stability. Indicates segmentation The normalized vibration data shows a low degree of stability.

[0059] Obtain the normalized value of the low stability comparison performance value of each segment, and determine the segments whose normalized value is greater than or equal to the preset performance value threshold as candidate segments;

[0060] By using the low stability comparison performance value of each candidate segment and the time length of each candidate segment, the degree of conformity of the stable wear stage of each candidate segment is obtained, and the candidate segment corresponding to the maximum value of the degree of conformity of the stable wear stage is determined as the stable wear stage of the first curve and the second curve.

[0061] The expression for the degree of conformity of the stable wear stage for each candidate segment is as follows:

[0062]

[0063] Indicates segmentation The degree of conformity of the stable wear stage Indicates segmentation The length of time;

[0064] By using the stable wear stage of the first curve and the second curve, the initial break-in stage and the late failure stage of the first curve and the second curve are obtained; by using the leakage amount and vibration value at all times during the initial break-in stage, the sealing performance value of the mechanical seal device is obtained.

[0065] The expression for the sealing performance value of the mechanical seal device is as follows:

[0066]

[0067] Indicates mechanical seal device The sealing performance value, Indicates the initial break-in period The maximum value of the vibration at all times. Indicates the initial break-in period The number of moments in time Indicates the initial break-in period Every moment The amount of leakage, Indicates the stable wear stage The average leakage amount at all times;

[0068] The test duration of the mechanical seal device is obtained. Based on the test duration, the leakage and vibration values ​​at the two earliest and two latest adjacent moments in the late failure stage are used to obtain the wear performance values ​​of the mechanical seal device, specifically including:

[0069] The sum of the durations of the initial break-in phase, the stable wear phase, and the late failure phase is determined as the experimental time length of the mechanical seal device.

[0070] Calculate the slope of the first leakage change on the first curve and the slope of the first vibration value change on the second curve for the two earliest adjacent moments in the late failure stage.

[0071] Calculate the slope of the second leakage rate change on the first curve and the slope of the second vibration value change on the second curve for the two latest adjacent moments in the late failure stage.

[0072] The product of the slope of the first leakage rate change and the slope of the first vibration value change is determined as the wear rate of the two earliest adjacent moments in the late failure stage.

[0073] The product of the slope of the second leakage rate change and the slope of the second vibration value change is determined as the wear rate of the two latest adjacent moments in the late failure stage.

[0074] The wear performance value of the mechanical seal device is determined by using the difference between the wear rates of the two earliest and two latest adjacent moments in the late failure stage, and the experimental time length of the mechanical seal device.

[0075] The expression for the wear performance value of a mechanical seal device is as follows:

[0076]

[0077] Indicates mechanical seal device Wear performance values, Indicates the two latest adjacent times , The wear rate, Indicates the earliest two adjacent times , The wear rate, Indicates mechanical seal device The length of the experiment;

[0078] The data display module is used to visualize the sealing performance and wear performance values ​​of the mechanical seal device.

[0079] The beneficial effects of the technical solution of this invention are as follows: This invention proposes a data management method and system for mechanical seal testing. It analyzes the data changes of the curve to determine the stable wear stage of the curve, and then divides the curve into different stages based on the stable wear stage. The sealing performance of the mechanical seal device is judged based on the leakage and vibration values ​​during the initial break-in stage, and the wear resistance of the mechanical seal device is judged based on its usable time and late failure rate. This makes the performance evaluation of the mechanical seal device more consistent with actual performance, thereby improving the accuracy of data management. Attached Figure Description

[0080] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0081] Figure 1 This is a flowchart illustrating the steps of a data management method for mechanical seal testing according to the present invention.

[0082] Figure 2 This is a block diagram of a data management system for mechanical seal testing according to the present invention. Detailed Implementation

[0083] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a data management method and system for mechanical seal testing proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0085] The following description, in conjunction with the accompanying drawings, details a specific solution for a data management method and system for mechanical seal testing provided by the present invention.

[0086] Please see Figure 1 The diagram illustrates a flowchart of a data management method for mechanical seal testing according to an embodiment of the present invention, the method comprising the following steps:

[0087] Step S001: Obtain the first curve and the second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device.

[0088] This invention analyzes the data changes of the curve to determine the stable wear stage, and then divides the curve into different stages based on the stable wear stage. The sealing performance of the mechanical seal is judged based on the leakage and vibration values ​​during the initial break-in stage, and the wear resistance is judged based on the usable time and late failure rate of the mechanical seal. This makes the performance evaluation of the mechanical seal more consistent with actual performance, thereby improving the accuracy of data management.

[0089] Specifically, a collection tray is placed at the lower end of the corresponding area of ​​the mechanical seal device to collect the leaked liquid. The entire collection tray is then placed on a high-precision, small-range load cell. By monitoring the linear change in the weight of the leaked liquid, the precise amount of leakage at different times is calculated. With the leakage amount as the vertical axis (leakage from small to large as positive) and the corresponding time as the horizontal axis (time from early to late as positive), a curve showing the change in leakage amount is obtained.

[0090] Vibration sensors are installed near the end face of the mechanical seal to monitor linear changes in vibration values. For example, an accelerometer is installed near the end face of the stationary ring (gland) to obtain the magnitude of acceleration in the corresponding area of ​​the mechanical seal along the sensor's sensitive axis. The vibration variation curve is obtained by plotting the magnitude of acceleration on the vertical axis, with acceleration increasing as the positive direction, the corresponding time on the horizontal axis, and time increasing as the positive direction.

[0091] Step S002: Obtain all segments corresponding to the first curve and the second curve, and determine the stable wear stage of the first curve and the second curve by using the leakage amount and vibration value corresponding to each segment.

[0092] It should be noted that mechanical seals experience varying degrees of wear on their end faces at different stages of use, leading to different variations in leakage and end-face vibration. To accurately assess the sealing and wear resistance of mechanical seals, this embodiment divides the experimental mechanical seals into different wear stages, primarily including the initial break-in stage, the stable wear stage, and the late failure stage. Since leakage and end-face vibration are relatively stable during the stable wear stage, the stable wear stage is determined by observing the stable changes in data over different time periods, thus identifying the different wear stages.

[0093] In this embodiment, the first curve is clustered to obtain all segments corresponding to the first curve; based on all segments corresponding to the first curve, all segments corresponding to the second curve are obtained; wherein, all segments corresponding to the first curve and all segments corresponding to the second curve have a one-to-one correspondence; using the leakage volume and vibration value corresponding to each segment, the low stability degree of leakage volume data change and the low stability degree of vibration data change of each segment are obtained; based on the low stability degree of leakage volume data change and the low stability degree of vibration data change of each segment, the low stability degree comparison performance value of each segment is obtained; based on the low stability degree comparison performance value of each segment, candidate segments are determined; using the low stability degree comparison performance value of each candidate segment and the time length of each candidate segment, the stable wear stage conformity degree of each candidate segment is obtained, and the candidate segment corresponding to the maximum stable wear stage conformity degree is determined as the stable wear stage of the first curve and the second curve.

[0094] In this embodiment, the data points in the first curve are clustered to obtain all cluster ranges. Each cluster range is used as a segment of the first curve to obtain all segments corresponding to the first curve. The abscissa of each segment of the first curve is used as the abscissa of each segment of the second curve to perform segmentation processing on the second curve to obtain all segments corresponding to the second curve.

[0095] Specifically, the first curve is segmented: using the DBSCAN (Density-Based Spatial Clustering of Applications with Noise) method, the minimum number of points in the neighborhood of a core point of different sizes is set, and different clustering methods are used to process the leakage rate variation curve. The different clustering ranges obtained are used as different segments. The DBSCAN method is a well-known technique and will not be described in detail here.

[0096] Then, after obtaining all segments of the first curve, the second curve is segmented according to the segments of the first curve. At this point, all segments of the first and second curves are obtained, and the x-coordinates of each segment of the first curve and each segment of the second curve are consistent.

[0097] In this embodiment, for each segment of the first curve, the stability of the leakage volume data change in each segment is obtained by using the leakage volume at each moment within the segment, the average leakage volume at all moments within the segment, and the number of moments within the segment; the low stability of the leakage volume data change in each segment is obtained by using the stability of the leakage volume data change in each segment and the maximum leakage volume at all moments within the segment. For each segment of the second curve, the stability of the vibration value data change in each segment is obtained by using the vibration value at each moment within the segment, the average vibration value at all moments within the segment, and the number of moments within the segment; the low stability of the vibration data change in each segment is obtained by using the stability of the vibration value data change in each segment and the maximum vibration value at all moments within the segment.

[0098] Specifically, first calculate the stability of the leakage data change in each segment:

[0099] Calculation period Multiple moments The amount of leakage mean Thus, the time period is obtained. The stability of the leakage data is expressed as follows:

[0100]

[0101] in, Indicates time period The stability of the leakage data. Indicates time period The number of detection moments.

[0102] Then obtain the time period. Multiple moments Maximum leakage volume .

[0103] It should be noted that when the leakage data shows a high degree of stability and the time period is relatively short: Multiple moments The smaller the maximum leakage volume, the shorter the time period. The more the leakage data matches the characteristics of small leakage and small data changes in the stable wear stage, the more suitable it is as a division of the stable wear stage.

[0104] From this, the time period can be obtained. The expression for the low stability of changes in leakage volume data is as follows:

[0105]

[0106] in, Indicates time period The leakage data showed low stability.

[0107] Using the maximum-minimum normalization method After normalization, we get Its range is [0, 1].

[0108] This method is used to obtain the stability of leakage data changes across all time periods.

[0109] It should be noted that during the stable wear phase, the performance of the end-face vibration data is consistent with that of the leakage data; both are stable and have relatively low values. Therefore, the leakage data in the above method is replaced with vibration value data to obtain the time period. Low stability of internal vibration data changes .

[0110] In this embodiment, the sum of the low stability of leakage data change and the low stability of vibration data change in each segment is used to determine the low stability of data change in each segment; using the low stability of data change in each segment and the maximum value of low stability of data change in all segments, the low stability performance value of each segment is obtained.

[0111] It should be noted that at the very beginning of the initial break-in phase, due to the roughness of the end faces and the presence of numerous microscopic leakage channels, more leakage may be observed compared to the stabilization period. As the break-in progresses, wear debris may temporarily block the leakage channels, or the end faces may gradually come together, and the leakage will rapidly decrease within minutes to hours, eventually reaching a very low stable value. The leakage will exhibit a transition from a relatively high level to an extremely low level. This is because the end face contact is uneven at this stage, and the collision and breakage of microscopic peaks generate high-frequency vibration components, resulting in a relatively high vibration level.

[0112] During the stable wear phase, for liquid seals, the ideal state is that liquid dripping is invisible to the naked eye, with only trace amounts of medium vaporizing and escaping. For seals that allow for small leaks, this may manifest as extremely slow, intermittent dripping (e.g., one drop every few minutes or even an hour), with minimal and stable leakage. Due to the smooth and flat end faces, the liquid film is stable, the fluid damping effect between the end faces is good, and the vibration level is very low.

[0113] In the late stage of failure, damage will appear on the end face and gradually worsen, leading to a continuous and irreversible increase in leakage. In terms of end face vibration, this is mainly manifested as a sharp increase in vibration level (a significant increase in vibration acceleration).

[0114] Therefore, compared to other stages, the leakage and low stability of end face vibration are smaller in the stable wear stage. The stable wear stage is judged based on this characteristic.

[0115] Specifically, at that time Low stability of vibration data changes Low stability of leakage data The fact that the sum of the values ​​is smaller than in other periods proves that this period is more in line with the requirements of the stable wear stage.

[0116] From this, the time period can be obtained. The performance value for low stability is expressed as follows:

[0117]

[0118] in, Indicates time period The performance value of low stability is compared. Represents all time periods The maximum value in the time period. The greater the degree of low stability, the more it meets the requirements of the stable wear stage.

[0119] In this embodiment, the normalized value of the low stability comparison performance value of each segment is obtained, and the segments with normalized values ​​greater than or equal to the preset performance value threshold are determined as candidate segments.

[0120] It should be noted that the preset performance value thresholds are set according to specific circumstances, and no specific restrictions are imposed here.

[0121] Specifically, for Max-min normalization is performed, with a value range of [0, 1]. Time periods with a value less than 0.8 after normalization are excluded to obtain the remaining time periods, which are then used as candidate segments.

[0122] Finally, obtain the time period. Length of time .when Larger and The longer the duration, the more completely the current time period encompasses the stable wear stage, and the more closely this time period conforms to the division of the stable wear stage. This allows us to obtain the remaining time periods. The degree of conformity to the steady wear stage is expressed as follows:

[0123]

[0124] in, Indicates time period The degree of conformity with the stable wear stage. The above calculations are performed on all remaining time periods, and the results are... The period with the greatest wear is considered the stable wear phase.

[0125] Step S003: Using the stable wear stages of the first curve and the second curve, obtain the initial break-in stage and the late failure stage of the first curve and the second curve.

[0126] In this embodiment, the curve before the stable wear stage in the first curve and the second curve is defined as the initial break-in stage of the first curve and the second curve; the curve after the stable wear stage in the first curve and the second curve is defined as the late failure stage of the first curve and the second curve.

[0127] It should be noted that when the wear of the mechanical seal is small during the initial break-in period and the leakage is also small during the stable wear period, it proves that the mechanical seal can enter the optimal working state more quickly, and its overall sealing effect and life expectancy are better.

[0128] Specifically, the mechanical operation period preceding the stable wear stage is defined as the initial break-in stage. The mechanical operation period following the stable wear stage is defined as the late failure stage.

[0129] Step S004: Obtain the sealing performance value of the mechanical seal device by using the leakage amount and vibration value at all times during the initial break-in period.

[0130] In this embodiment, the average leakage amount at all times during the initial break-in period, the maximum vibration value at all times, and the number of times during the initial break-in period are obtained. Based on the leakage amount at each time during the initial break-in period, the average leakage amount at all times, the maximum vibration value at all times, and the number of times during the initial break-in period, the sealing performance value of the mechanical seal device is determined.

[0131] Specifically, through the initial break-in phase All moments Leakage volume Adding them together gives the initial break-in phase. Total leakage . Initial break-in phase The number of all moments.

[0132] Initial break-in phase The maximum value of vibration obtained at all times When the maximum vibration value is small and the total leakage is low, the end face of the mechanical seal device being tested is relatively smooth, which is beneficial during the initial break-in period. The wear is relatively small during this initial break-in period. Therefore, the initial break-in stage can be considered... The expression for the underperformance of the mechanical seal device is as follows:

[0133]

[0134] in, Indicates the initial break-in period The wear of the mechanical seal device is relatively small.

[0135] Calculate the steady wear stage Average leakage at all times During the initial break-in period The wear of the mechanical seal device is relatively small during the initial break-in period, but the value is relatively large. The smaller the number of all moments, the more stable the wear phase. When the average leakage amount at all times is small, the mechanical seal device has a small total wear amount and a shorter maintenance time during the initial break-in stage, which means that the seal can enter the optimal working state more quickly, and the leakage amount is small during the stable wear stage, so its overall sealing effect is better.

[0136] This leads to the mechanical seal device. The sealing performance value is expressed as follows:

[0137]

[0138] in, Indicates mechanical seal device The sealing performance values ​​were then analyzed using the maximum-minimum normalization method. After normalization, we get Its range is [0, 1].

[0139] Step S005: Obtain the test time length of the mechanical seal device. Based on the test time length of the mechanical seal device, the leakage volume and vibration value of the two earliest adjacent moments in the late failure stage, and the leakage volume and vibration value of the two latest adjacent moments, obtain the wear performance value of the mechanical seal device.

[0140] In this embodiment, the sum of the time lengths of the initial break-in stage, the stable wear stage, and the late failure stage is determined as the experimental time length of the mechanical seal device. The slope of the first leakage rate change on the first curve and the slope of the first vibration value change on the second curve are calculated for the two earliest adjacent moments in the late failure stage. The slope of the second leakage rate change on the first curve and the slope of the second vibration value change on the second curve are calculated for the two latest adjacent moments in the late failure stage. The product of the first leakage rate change slope and the first vibration value change slope is determined as the wear rate for the two earliest adjacent moments in the late failure stage. The product of the second leakage rate change slope and the second vibration value change slope is determined as the wear rate for the two latest adjacent moments in the late failure stage. The wear performance value of the mechanical seal device is determined using the difference between the wear rates for the two earliest and two latest adjacent moments in the late failure stage, and the experimental time length of the mechanical seal device.

[0141] It should be noted that the longer the total duration of the test on the mechanical seal device and the slower the rate of change in the late failure stage, the better the sealing ring material of the current mechanical seal device exhibits in terms of wear resistance and tribological compatibility. Even in the late wear stage, the end face shows predominantly uniform wear rather than sudden fracture.

[0142] Specifically, obtain the mechanical seal device currently being tested. Experimental duration The experimental duration was obtained by summing the durations of the initial break-in phase, the stable wear phase, and the late failure phase.

[0143] Calculating late failure stage The earliest two adjacent moments , With the two latest adjacent times , The slopes of the changes in leakage volume and vibration, respectively. Calculate the wear rate at each adjacent time point. , This yields the earliest two adjacent times. , With the two latest adjacent times , wear rate difference .

[0144] When the wear rate difference is small, and the mechanical seal device Experimental duration The larger the value, the longer the service life of the mechanical seal device. Even in the late stage of wear, the end face will mainly wear evenly, and the wear performance will be stronger.

[0145] This leads to the mechanical seal device. The wear performance value is expressed as follows:

[0146]

[0147] in, Indicates mechanical seal device The wear performance value.

[0148] Then, the maximum-minimum normalization method is used to... After normalization, we get Its range is [0, 1].

[0149] Step S006: Visualize the sealing performance and wear performance values ​​of the mechanical seal device.

[0150] The above methods are used to determine the wear stage of different mechanical seal devices, and the sealing performance and wear resistance of different mechanical seal devices are analyzed accordingly.

[0151] The sealing performance and wear resistance of different mechanical seal devices are transmitted and stored in the database.

[0152] pass The query statement retrieves the corresponding performance of different mechanical seal devices from the database and displays it in a table on the operator's screen.

[0153] Please see Figure 2 The diagram illustrates a block diagram of a data management system for mechanical seal testing according to an embodiment of the present invention. The system includes the following modules:

[0154] The data acquisition module 100 is used to acquire a first curve and a second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device.

[0155] The data analysis module 200 is used to acquire all segments corresponding to the first curve and the second curve, and to determine the stable wear stage of the first curve and the second curve using the leakage amount and vibration value corresponding to each segment; to acquire the initial running-in stage and the late failure stage of the first curve and the second curve using the stable wear stage of the first curve and the second curve; to acquire the sealing performance value of the mechanical seal device using the leakage amount and vibration value at all times in the initial running-in stage; to acquire the test time length of the mechanical seal device, and to acquire the wear performance value of the mechanical seal device based on the test time length of the mechanical seal device, the leakage amount and vibration value at the earliest two adjacent times in the late failure stage, and the leakage amount and vibration value at the latest two adjacent times;

[0156] The data display module 300 is used to visualize the sealing performance and wear performance values ​​of the mechanical seal device.

[0157] This invention is now complete.

[0158] In summary, this invention analyzes the data changes of the curve to determine the stable wear stage, and then divides the curve into different stages based on the stable wear stage. The sealing performance of the mechanical seal is judged based on the leakage and vibration values ​​during the initial break-in stage, and the wear resistance is judged based on the usable time and late failure rate of the mechanical seal. This makes the performance evaluation of the mechanical seal more consistent with actual performance, thereby improving the accuracy of data management.

[0159] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A data management method for mechanical seal testing, characterized in that, The method includes the following steps: Obtain the first curve and the second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device; Obtain all segments corresponding to the first and second curves. Using the leakage volume and vibration value corresponding to each segment, determine the stable wear stages of the first and second curves, specifically including: Cluster the first curve to obtain all segments corresponding to the first curve; based on all segments corresponding to the first curve, obtain all segments corresponding to the second curve; wherein, all segments corresponding to the first curve and all segments corresponding to the second curve have a one-to-one correspondence. By using the leakage volume and vibration value corresponding to each segment, the stability of the leakage volume data change and the stability of the vibration data change of each segment are obtained. The expression for the degree of low stability of leakage data changes in each segment is as follows: Indicates segmentation The leakage data showed low stability. Indicates segmentation The number of time intervals within a time interval Indicates segmentation Every moment within The amount of leakage, Indicates segmentation The average leakage amount at all times within the time frame. Indicates segmentation The maximum leakage volume at all times; Replace the leakage data in the expression for the low stability of leakage data change in each segment with vibration data to obtain the low stability of vibration data change in each segment. Based on the stability of leakage data and vibration data changes in each segment, a comparative performance value of stability for each segment is obtained. The expression for the low stability performance value of each segment is as follows: Indicates segmentation The performance value of low stability is compared. This represents all segments obtained The maximum value in, Indicates segmentation The normalized leakage data showed low stability. Indicates segmentation The normalized vibration data shows a low degree of stability. Obtain the normalized value of the low stability comparison performance value of each segment, and determine the segments whose normalized value is greater than or equal to the preset performance value threshold as candidate segments; By using the low stability comparison performance value of each candidate segment and the time length of each candidate segment, the degree of conformity of the stable wear stage of each candidate segment is obtained, and the candidate segment corresponding to the maximum value of the degree of conformity of the stable wear stage is determined as the stable wear stage of the first curve and the second curve. The expression for the degree of conformity of the stable wear stage for each candidate segment is as follows: Indicates segmentation The degree of conformity of the stable wear stage Indicates segmentation The duration of the break-in period; using the stable wear stages of the first and second curves, the initial break-in stage and the late failure stage of the first and second curves are obtained. By utilizing the leakage and vibration values ​​at all times during the initial break-in period, the sealing performance values ​​of the mechanical seal device are obtained. The expression for the sealing performance value of the mechanical seal device is as follows: Indicates mechanical seal device The sealing performance value, Indicates the initial break-in period The maximum value of the vibration at all times. Indicates the initial break-in period The number of moments in time Indicates the initial break-in period Every moment The amount of leakage, Indicates the stable wear stage The average leakage amount at all times; The test duration of the mechanical seal device is obtained. Based on the test duration, the leakage and vibration values ​​at the two earliest and two latest adjacent moments in the late failure stage are used to obtain the wear performance values ​​of the mechanical seal device, specifically including: The sum of the durations of the initial break-in phase, the stable wear phase, and the late failure phase is determined as the experimental time length of the mechanical seal device. Calculate the slope of the first leakage change on the first curve and the slope of the first vibration value change on the second curve for the two earliest adjacent moments in the late failure stage. Calculate the slope of the second leakage rate change on the first curve and the slope of the second vibration value change on the second curve for the two latest adjacent moments in the late failure stage. The product of the slope of the first leakage rate change and the slope of the first vibration value change is determined as the wear rate of the two earliest adjacent moments in the late failure stage. The product of the slope of the second leakage rate change and the slope of the second vibration value change is determined as the wear rate of the two latest adjacent moments in the late failure stage. The wear performance value of the mechanical seal device is determined by using the difference between the wear rates of the two earliest and two latest adjacent moments in the late failure stage, and the experimental time length of the mechanical seal device. The expression for the wear performance value of a mechanical seal device is as follows: Indicates mechanical seal device Wear performance values, Indicates the two latest adjacent times , The wear rate, Indicates the earliest two adjacent times , The wear rate, Indicates mechanical seal device The length of the experiment; The sealing performance and wear performance values ​​of the mechanical seal device are displayed visually.

2. The data management method for mechanical seal testing according to claim 1, characterized in that, The specific steps for clustering the first curve to obtain all segments corresponding to the first curve, and obtaining all segments corresponding to the second curve based on all segments corresponding to the first curve, are as follows: Cluster the data points in the first curve to obtain all cluster ranges, and use each cluster range as a segment of the first curve to obtain all segments corresponding to the first curve; Use the x-coordinate of each segment of the first curve as the x-coordinate of each segment of the second curve, and then segment the second curve to obtain all the segments corresponding to the second curve.

3. The data management method for mechanical seal testing according to claim 1, characterized in that, The specific steps for obtaining the initial break-in stage and late failure stage of the first and second curves by utilizing the stable wear stage of the first and second curves are as follows: The curve before the stable wear stage in the first curve and the second curve is defined as the initial break-in stage of the first curve and the second curve. The curve following the stable wear stage in the first and second curves is defined as the late failure stage of the first and second curves.

4. A data management system for mechanical seal testing, characterized in that, The system includes the following modules: The data acquisition module is used to acquire the first curve and the second curve of the mechanical seal device; wherein, the first curve is the leakage change curve of the mechanical seal device, and the second curve is the vibration change curve of the mechanical seal device. The data analysis module is used to acquire all segments corresponding to the first and second curves. Using the leakage volume and vibration value corresponding to each segment, it determines the stable wear stage of the first and second curves, specifically including: Cluster the first curve to obtain all segments corresponding to the first curve; based on all segments corresponding to the first curve, obtain all segments corresponding to the second curve; wherein, all segments corresponding to the first curve and all segments corresponding to the second curve have a one-to-one correspondence. By using the leakage volume and vibration value corresponding to each segment, the stability of the leakage volume data change and the stability of the vibration data change of each segment are obtained. The expression for the degree of low stability of leakage data changes in each segment is as follows: Indicates segmentation The leakage data showed low stability. Indicates segmentation The number of time intervals within a time interval Indicates segmentation Every moment within The amount of leakage, Indicates segmentation The average leakage amount at all times within the time frame. Indicates segmentation The maximum leakage volume at all times; Replace the leakage data in the expression for the low stability of leakage data change in each segment with vibration data to obtain the low stability of vibration data change in each segment. Based on the stability of leakage data and vibration data changes in each segment, a comparative performance value of stability for each segment is obtained. The expression for the low stability performance value of each segment is as follows: Indicates segmentation The performance value of low stability is compared. This represents all segments obtained The maximum value in, Indicates segmentation The normalized leakage data showed low stability. Indicates segmentation The normalized vibration data shows a low degree of stability. Obtain the normalized value of the low stability comparison performance value of each segment, and determine the segments whose normalized value is greater than or equal to the preset performance value threshold as candidate segments; By using the low stability comparison performance value of each candidate segment and the time length of each candidate segment, the degree of conformity of the stable wear stage of each candidate segment is obtained, and the candidate segment corresponding to the maximum value of the degree of conformity of the stable wear stage is determined as the stable wear stage of the first curve and the second curve. The expression for the degree of conformity of the stable wear stage for each candidate segment is as follows: Indicates segmentation The degree of conformity of the stable wear stage Indicates segmentation The length of time; By using the stable wear stage of the first curve and the second curve, the initial break-in stage and the late failure stage of the first curve and the second curve are obtained; by using the leakage amount and vibration value at all times during the initial break-in stage, the sealing performance value of the mechanical seal device is obtained. The expression for the sealing performance value of the mechanical seal device is as follows: Indicates mechanical seal device The sealing performance value, Indicates the initial break-in period The maximum value of the vibration at all times. Indicates the initial break-in period The number of moments in time Indicates the initial break-in period Every moment The amount of leakage, Indicates the stable wear stage The average leakage amount at all times; The test duration of the mechanical seal device is obtained. Based on the test duration, the leakage and vibration values ​​at the two earliest and two latest adjacent moments in the late failure stage are used to obtain the wear performance values ​​of the mechanical seal device, specifically including: The sum of the durations of the initial break-in phase, the stable wear phase, and the late failure phase is determined as the experimental time length of the mechanical seal device. Calculate the slope of the first leakage change on the first curve and the slope of the first vibration value change on the second curve for the two earliest adjacent moments in the late failure stage. Calculate the slope of the second leakage rate change on the first curve and the slope of the second vibration value change on the second curve for the two latest adjacent moments in the late failure stage. The product of the slope of the first leakage rate change and the slope of the first vibration value change is determined as the wear rate of the two earliest adjacent moments in the late failure stage. The product of the slope of the second leakage rate change and the slope of the second vibration value change is determined as the wear rate of the two latest adjacent moments in the late failure stage. The wear performance value of the mechanical seal device is determined by using the difference between the wear rates of the two earliest and two latest adjacent moments in the late failure stage, and the experimental time length of the mechanical seal device. The expression for the wear performance value of a mechanical seal device is as follows: Indicates mechanical seal device Wear performance values, Indicates the two latest adjacent times , The wear rate, Indicates the earliest two adjacent times , The wear rate, Indicates mechanical seal device The length of the experiment; The data display module is used to visualize the sealing performance and wear performance values ​​of the mechanical seal device.

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