A detection method and system for end face sealing

Abstract

The present invention relates to the field of intelligent detection technology, and discloses a detection method and system for end face sealing, the system comprising: a detection platform, a drive motor, a fixed base, an infrared detection device, a medium circulation device and a control device; the control device is connected to the drive motor, the infrared detection device and the medium circulation device, the processing unit collects the size data of the detected part to determine the operating power of the drive motor and the interval time of the medium circulation device replacing the medium at the end face liquid film; the first judgment unit collects the corresponding infrared images of the static ring seal and the dynamic ring seal to determine whether there is leakage at the seal to determine the leakage score of the seal; the second judgment unit analyzes the discharged medium to determine whether there is abnormal vibration of the detected part to determine the vibration score; the early warning unit determines the detection score of the detected part to determine whether to issue an early warning. The present invention realizes comprehensive evaluation, reduces the risk of equipment failure, and realizes high-precision detection in a non-contact situation.

Description

Technical Field

[0001] The present invention relates to the field of intelligent detection technology, and in particular to a detection method and system for end face sealing. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation, which remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

[0003] In a mechanical sealing system, there are usually three key sealing positions, namely the dynamic ring seal, the static ring seal and the end face liquid film. The sealing performance is crucial to the normal operation of the equipment. However, due to long-term operation or changes in environmental conditions, leakage may occur at the seal ring and abnormal friction may occur at the end face liquid film, resulting in equipment performance degradation or even failure. Traditional sealing detection methods often rely on manual inspection or simple pressure testing. These methods are not only time-consuming and labor-intensive, but may also have detection blind spots and fail to detect internal sealing problems in a timely manner. If disassembly is used for detection, it is easy to damage the internal structure and it is impossible to effectively evaluate whether the leakage is caused by disassembly or leakage itself, and the detection effect is not obvious.

[0004] Therefore, it is necessary to design a detection method and system for end face sealing to solve the problems existing in the current technology. Summary of the invention

[0005] In view of this, the present invention proposes a detection method and system for end face seals, aiming to solve the problems of time-consuming and labor-intensive detection, low detection accuracy and poor detection effect in current mechanical end face seals.

[0006] In one aspect, the present invention provides a detection system for end face sealing, comprising:

[0007] An inspection platform, a driving motor, a fixed base, an infrared detection device, a medium circulation device and a control device; wherein the driving motor and the fixed base are arranged above the inspection platform, one side of the static ring of the inspected part is fixed on the fixed base, one side of the dynamic ring of the inspected part is connected to the driving motor, the infrared detection device is arranged on one side of the inspected part, the infrared detection device is used to detect infrared images at the static ring sealing ring and the dynamic ring sealing ring, the inlet end and the outlet end of the medium circulation device are respectively connected to the inspected part, the medium circulation device is used to circulate the medium at the liquid film on the internal end surface of the inspected part, the control device is connected to the driving motor, the infrared detection device and the medium circulation device, the control device includes a processing unit, a first judgment unit, a second judgment unit and an early warning unit, wherein,

[0008] The processing unit is configured to collect the size data of the detected part, determine the operating power of the drive motor and the interval time for the medium circulation device to replace the medium at the end surface liquid film according to the size data, and control the drive motor to operate for the interval time;

[0009] The first judgment unit is configured to collect infrared images corresponding to the static ring seal ring and the dynamic ring seal ring respectively based on the infrared detection device, process the infrared images to obtain a temperature gradient map, judge whether there is a leak at the seal ring according to the temperature gradient map, and determine the seal ring leakage score according to the temperature gradient map when a leak is determined;

[0010] The second judgment unit is configured to control the medium circulation device to operate the medium at the end surface liquid film and analyze the discharged medium, judge whether the detected part has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determine the vibration score according to the impurities and / or the medium temperature when it is determined that the abnormal vibration exists;

[0011] The early warning unit is configured to determine a detection score of the detected component according to the sealing ring leakage score and / or the vibration score, and determine whether to issue an early warning according to the detection score.

[0012] Further, when the processing unit determines the operating power of the driving motor and the interval time of the medium circulation device replacing the medium at the end surface liquid film according to the size data, the operating power and the interval time are calculated by the following formulas:

[0013]

[0014] Where P represents the operating power, represents the efficiency coefficient, represents the radius of the moving ring, Indicates the maximum speed of the moving ring. It represents the friction coefficient between the moving and static rings, A represents the contact area between the moving and static rings, p represents the maximum pressure borne by the moving ring, and v represents the maximum sliding speed of the moving ring;

[0015]

[0016] in, represents the density of the medium, h represents the average thickness of the end surface liquid film, represents the friction coefficient between the moving and static rings, Indicates the maximum speed of the moving ring. represents the radius of the moving ring, and t0 represents the preset standard interval time.

[0017] Furthermore, when the first judgment unit judges whether there is leakage at the sealing ring according to the temperature gradient diagram, it includes:

[0018] The first judgment unit processes the temperature gradient diagram, draws a temperature gradient curve, and performs analysis based on the temperature gradient curve to judge whether there is leakage at the sealing ring;

[0019] When there are concave points and convex points in the temperature gradient curve, the first judgment unit determines that there is leakage at the sealing ring;

[0020] When the temperature gradient curve is a smooth curve, the first judgment unit determines that there is no leakage at the sealing ring.

[0021] Further, when the first judgment unit determines that there is leakage at the sealing ring, determining the sealing ring leakage score according to the temperature gradient diagram includes:

[0022] The first judgment unit determines the logarithm of the convex points and the concave points according to the temperature gradient map, determines the area ratio of the convex points and the concave points according to the temperature gradient map, and determines the sealing ring leakage score according to the logarithm and the area ratio;

[0023]

[0024] Among them, Em represents the sealing ring leakage score, Nd represents the logarithm, N represents the total number of sampling points, M represents the area ratio, a and b represent weight coefficients, and a+b=1.

[0025] Furthermore, when the second judgment unit judges whether the detected component has abnormal vibration according to the impurities in the discharged medium and the medium temperature, it includes:

[0026] When foreign particles exist in the discharged medium, the second judgment unit determines that the detected part has abnormal vibration, and determines the vibration score according to the mass of the foreign particles and the medium temperature;

[0027] When there are no foreign particles in the discharged medium, the second determination unit determines whether the detected component has abnormal vibration according to the medium temperature.

[0028] Furthermore, when the second judging unit judges whether the detected component has abnormal vibration according to the medium temperature, it includes:

[0029] The second judgment unit obtains a medium temperature rise parameter according to the medium temperature and the initial temperature, compares the medium temperature rise parameter with a medium temperature rise threshold, and judges whether the detected component has abnormal vibration according to the comparison result;

[0030] When the medium temperature rise parameter is greater than the medium temperature rise threshold, the second judgment unit determines that the detected component has abnormal vibration, and determines the vibration score according to the medium temperature;

[0031] When the medium temperature rise parameter is less than or equal to the medium temperature rise threshold, the second judgment unit determines that the detected component does not have abnormal vibration.

[0032] Further, when the second judgment unit determines the vibration score, it includes:

[0033] When the second judgment unit determines the vibration score according to the mass of the impurity particles and the medium temperature, the vibration score is calculated by the following formula:

[0034]

[0035] Wherein, Z represents the vibration score, γ represents the adjustment coefficient, mz represents the mass of impurity particles, mt represents the total mass of the medium, Tf represents the medium temperature, and T0 represents the initial temperature;

[0036] When the second judgment unit determines the vibration score according to the medium temperature, the vibration score is calculated by the following formula:

[0037]

[0038] Where Z is the vibration score, represents the temperature influence coefficient, Tf represents the medium temperature, T0 represents the initial temperature, and Tmax represents the medium temperature rise threshold.

[0039] Further, when the early warning unit determines the detection score of the detected component according to the sealing ring leakage score and / or vibration score, it includes:

[0040] The early warning unit determines the detection score by the following formula:

[0041]

[0042] Among them, S represents the detection score, α and β represent the sealing ring leakage weight and vibration weight respectively, Em represents the sealing ring leakage score, and Z represents the vibration score.

[0043] Furthermore, when the early warning unit determines whether to issue an early warning according to the detection score, it includes:

[0044] When the detection score is not zero, the warning unit determines to issue a warning and compares the detection score with a first preset score and a second preset score respectively, and determines a warning level according to the comparison result, the first preset score is less than the second preset score, and the first preset score is greater than zero;

[0045] When the detection score is greater than zero and less than or equal to a first preset score, the warning unit issues a third-level warning;

[0046] When the detection score is greater than the first preset score and less than or equal to the second preset score, the warning unit issues a second-level warning;

[0047] When the detection score is greater than a second preset score, the warning unit issues a first-level warning.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows: an infrared detection device is used to monitor the infrared images of the static ring and the dynamic ring seals in real time, and the leakage of the seals can be accurately determined through the temperature gradient diagram. The medium circulation device replaces the medium at the end surface liquid film and analyzes the discharged medium to monitor the vibration state of the seal. Abnormal vibration problems can be effectively identified through a comprehensive analysis of the impurity particles and temperature changes in the medium. In addition, the processing unit in the control device intelligently adjusts the operating power of the drive motor and the interval time of the medium circulation according to the size data of the inspected part to ensure the efficiency and accuracy of the inspection process. The sealing ring leakage score and the vibration score are combined through the early warning unit to achieve a comprehensive evaluation of the inspected part, thereby providing an early warning function, reducing the risk of equipment failure, overcoming the shortcomings of traditional methods, and achieving high-precision detection in a non-contact situation.

[0049] On the other hand, the present application also provides a detection method for end face sealing, which is applied to the above-mentioned detection system for end face sealing, comprising:

[0050] Collecting the size data of the detected part, determining the operating power of the driving motor and the interval time for the medium circulation device to replace the medium at the end surface liquid film according to the size data, and controlling the driving motor to operate for the interval time;

[0051] Based on the infrared detection device, infrared images corresponding to the static ring seal and the dynamic ring seal are respectively collected, and the infrared images are processed to obtain a temperature gradient map, and whether there is a leak at the seal is determined according to the temperature gradient map, and when a leak is determined, a seal leakage score is determined according to the temperature gradient map;

[0052] Controlling the medium circulation device to operate and replace the medium at the end surface liquid film and analyzing the discharged medium, judging whether the detected part has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determining the vibration score according to the impurities and / or the medium temperature when it is determined that the abnormal vibration exists;

[0053] The inspection score of the inspected component is determined according to the sealing ring leakage score and / or the vibration score, and whether to issue an early warning is determined according to the inspection score.

[0054] It is understandable that the above-mentioned detection method and system for end face sealing have the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0056] Figure 1 A schematic diagram of the structure of a detection system for end face sealing provided in an embodiment of the present invention;

[0057] Figure 2 A flow chart of a method for detecting end face seal provided in an embodiment of the present invention.

[0058] Among them, 100, the detection table; 200, the driving motor; 300, the fixed base; 400, the infrared detection device; 500, the medium circulation device; 600, the control device; 700, the detected part. DETAILED DESCRIPTION

[0059] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] Mechanical seals are devices that prevent fluid leakage through a pair of end faces perpendicular to the axis of rotation under the action of fluid pressure, the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of auxiliary seals. In the mechanical seal system, the dynamic ring seal, the static ring seal and the end face liquid film are three key sealing positions, and their sealing performance is crucial to the normal operation of the equipment. However, due to long-term operation of the equipment or changes in environmental conditions, these sealing parts often have problems. Specifically, the seal may leak due to aging, wear or material fatigue. The end face liquid film may have abnormal friction due to uneven friction or medium degradation. These problems will not only lead to a decline in equipment performance, but in severe cases may even cause equipment failure or shutdown.

[0061] Traditional sealing detection methods mainly rely on manual inspection or simple pressure testing, which have many limitations. First, manual inspection is easily affected by human factors, the detection efficiency is low and the results are not accurate enough. Secondly, although simple pressure tests can provide certain leakage indications, they can often only find more obvious sealing defects, and cannot identify minor leaks or early abnormalities in time. In addition, traditional methods usually require the equipment to be disassembled in order to check the internal sealing conditions, but this method is not only time-consuming and labor-intensive, but also prone to secondary damage to the equipment, and it is difficult to distinguish whether the leakage is caused by the disassembly process or the original sealing problem. Therefore, it is necessary to design a detection method and system for end face sealing to solve the problems existing in the current technology.

[0062] In some embodiments of the present application, see Figure 1 As shown, a detection system for end face sealing includes a detection platform 100, a drive motor 200, a fixed base 300, an infrared detection device 400, a medium circulation device 500 and a control device 600. The drive motor 200 and the fixed base 300 are arranged above the detection platform 100, the static ring side of the detected part 700 is fixed on the fixed base 300, the dynamic ring side of the detected part 700 is connected to the drive motor 200, the infrared detection device 400 is arranged on one side of the detected part 700, the infrared detection device 400 is used to detect the infrared images of the static ring seal and the dynamic ring seal, the inlet end and the outlet end of the medium circulation device 500 are respectively connected to the detected part 700, the medium circulation device 500 is used to circulate the medium at the liquid film on the internal end face of the detected part 700, the control device 600 is connected to the drive motor 200, the infrared detection device 400 and the medium circulation device 500, the control device 600 includes a processing unit, a first judgment unit, a second judgment unit and an early warning unit, wherein,

[0063] The processing unit is configured to collect the size data of the detected part 700, determine the operating power of the drive motor 200 and the interval time for the medium circulation device 500 to replace the medium at the end surface liquid film according to the size data, and control the operating interval time of the drive motor 200.

[0064] The first judgment unit is configured to collect infrared images corresponding to the static ring sealing ring and the dynamic ring sealing ring respectively based on the infrared detection device 400, process the infrared images to obtain a temperature gradient map, judge whether there is a leak at the sealing ring according to the temperature gradient map, and determine the sealing ring leakage score according to the temperature gradient map when a leak is determined.

[0065] The second judgment unit is configured to control the medium circulation device 500 to operate the medium at the replacement end surface liquid film and analyze the discharged medium, judge whether the detected part 700 has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determine the vibration score according to the impurities and / or medium temperature when it is determined that abnormal vibration exists.

[0066] The early warning unit is configured to determine the detection score of the detected component 700 according to the sealing ring leakage score and / or the vibration score, and determine whether to issue an early warning according to the detection score.

[0067] Specifically, the drive motor 200 is responsible for driving the rotation of the test piece 700 (dynamic ring) to simulate the dynamic sealing environment under actual working conditions. The static ring of the test piece 700 is fixed on the fixed base 300 to ensure that it remains motionless during the test. The entire drive part is installed on the test bench 100, providing a stable experimental environment. The infrared detection device 400 is arranged on one side of the test piece 700 and is specifically used to capture infrared images of the static ring and the dynamic ring seal. By detecting the change in temperature distribution, a temperature gradient map is generated to determine whether there is a leak at the seal. Areas with abnormal temperatures may represent defects or damage to the seal, resulting in medium leakage. The medium circulation device 500 is used to replace the medium inside the test piece 700. The medium flows out from the outlet of the medium circulation device 500, enters the detected part 700 through the inlet of the detected part 700, forms an end surface liquid film inside the detected part 700, and after running for a certain period of time, when new medium enters the detected part 700, it is discharged from the outlet of the detected part 700, flows into the medium circulation device 500 through the inlet of the medium circulation device 500, and the medium circulation device 500 analyzes and processes the medium. The control device 600 is the core of the entire system and is responsible for coordinating the work of each component. It includes multiple units. Processing unit: collects the size data of the detected part 700, uses these data to calculate the operating power of the drive motor 200, and determines the operating interval of the medium circulation device 500 to ensure timely replacement of the medium at the liquid film. The first judgment unit: analyzes the image collected by the infrared detection device 400, generates a temperature gradient map, and judges whether there is a leak based on the map. If there is a leak, the leakage score of the sealing ring is calculated based on the concave and convex point features in the temperature gradient map. Second judgment unit: detects impurities and temperature changes in the medium discharged by the medium circulation device 500, and determines whether there is abnormal vibration. According to the analysis results, a vibration score is calculated. Early warning unit: combines the sealing ring leakage score and the vibration score to generate a total detection score. When the detection score exceeds the preset threshold, the early warning unit will sound an alarm.

[0068] It is understandable that by integrating infrared detection, medium circulation analysis and intelligent control functions, efficient and accurate detection of mechanical end face sealing performance is achieved. Compared with traditional manual inspection and simple pressure test methods, real-time monitoring of the state of the sealing ring is achieved, and potential leakage and vibration problems can be quickly identified through temperature gradient and medium analysis, which improves the accuracy and efficiency of detection and reduces equipment maintenance costs and failure risks.

[0069] In some embodiments of the present application, when the processing unit determines the operating power of the drive motor 200 and the interval time of the medium circulation device 500 replacing the medium at the end surface liquid film according to the size data, the operating power and the interval time are calculated by the following formulas:

[0070]

[0071] Where P represents the operating power, represents the efficiency coefficient, represents the radius of the moving ring, Indicates the maximum speed of the moving ring. It represents the friction coefficient between the moving and static rings, A represents the contact area of ​​the moving and static rings, p represents the maximum pressure that the moving ring can withstand, and v represents the maximum sliding speed of the moving ring. Preferably 0.85~0.95, v≈2π n / 60.

[0072]

[0073] in, represents the density of the medium, h represents the average thickness of the end surface liquid film, represents the friction coefficient between the moving and static rings, Indicates the maximum speed of the moving ring. represents the radius of the moving ring, and t0 represents the preset standard interval time.

[0074] It is understandable that directly associating the operating power of the drive motor 200 and the interval time of the medium circulation device 500 with the actual working parameters of the detected part 700 (such as the radius of the moving ring, the maximum speed, the friction coefficient, etc.) enables the detection system to dynamically adjust its operation according to the actual working conditions. Compared with the traditional fixed parameter setting, it is conducive to more accurately adapting to different detection environments and seal specifications, ensuring the accuracy and reliability of the detection results and improving the system's adaptive ability. At the same time, dynamically adjusting the operating power and the medium circulation interval helps to extend the service life of the equipment.

[0075] In some embodiments of the present application, when the first judgment unit judges whether there is a leakage at the sealing ring according to the temperature gradient map, it includes: the first judgment unit processes the temperature gradient map, draws a temperature gradient curve, and analyzes according to the temperature gradient curve to judge whether there is a leakage at the sealing ring.

[0076] Specifically, when there are concave points and convex points in the temperature gradient curve, the first judgment unit determines that there is leakage at the sealing ring. When the temperature gradient curve is a smooth curve, the first judgment unit determines that there is no leakage at the sealing ring.

[0077] In some embodiments of the present application, when the first judgment unit determines that there is a leak at the sealing ring and determines the sealing ring leakage score according to the temperature gradient map, it includes: the first judgment unit determines the logarithm of the convex points and the concave points according to the temperature gradient map, and determines the area ratio of the convex points and the concave points according to the temperature gradient map, and determines the sealing ring leakage score according to the logarithm and the area ratio.

[0078]

[0079] Among them, Em represents the sealing ring leakage score, Nd represents the logarithm, N represents the total number of sampling points, M represents the area ratio, a and b represent weight coefficients, and a+b=1.

[0080] Specifically, the first judgment unit generates a corresponding temperature gradient curve by processing the temperature gradient graph collected by the infrared detection device 400. When there are obvious concave points and convex points in the temperature gradient curve, these abnormal points indicate that there is a temperature difference at the sealing ring. Due to the presence of a leak, there is a medium intercommunication at the leaking position, and there is an obvious temperature difference from the non-leaking position, which will form concave and convex points on the curve. Therefore, the first judgment unit will judge this situation as a leak. When the temperature gradient curve is a smooth curve, it means that the temperature distribution is uniform and there is no obvious temperature difference, indicating that there is no leakage problem at the sealing ring. The first judgment unit will judge this situation as no leak.

[0081] It can be understood that a method for detecting sealing ring leakage is provided through a detailed analysis of the temperature gradient curve. Compared with the traditional simple temperature difference detection, it can not only detect leakage, but also generate a specific leakage score by quantitatively analyzing the number and area of ​​concave and convex points. This scoring method makes the test results more quantifiable and reliable, and can provide a more intuitive basis for subsequent repairs and maintenance. By setting the weight coefficient, the scoring criteria can also be adjusted according to different usage scenarios and needs, so that it can be more flexibly applied to the detection of various mechanical sealing systems, thereby further improving the safety and operation efficiency of the equipment.

[0082] In some embodiments of the present application, when the second judgment unit judges whether the detected part 700 has abnormal vibration according to the impurities in the discharged medium and the medium temperature, it includes: when there are foreign particles in the discharged medium, the second judgment unit determines that the detected part 700 has abnormal vibration, and determines the vibration score according to the mass of the foreign particles and the medium temperature. When there are no foreign particles in the discharged medium, the second judgment unit judges whether the detected part 700 has abnormal vibration according to the medium temperature.

[0083] In some embodiments of the present application, when the second judgment unit judges whether the detected component 700 has abnormal vibration based on the medium temperature, it includes: the second judgment unit obtains the medium heating parameter based on the medium temperature and the initial temperature, compares the medium heating parameter with the medium heating threshold, and judges whether the detected component 700 has abnormal vibration based on the comparison result.

[0084] Specifically, when the medium temperature rise parameter is greater than the medium temperature rise threshold, the second judgment unit determines that the detected component 700 has abnormal vibration and determines the vibration score according to the medium temperature. When the medium temperature rise parameter is less than or equal to the medium temperature rise threshold, the second judgment unit determines that the detected component 700 does not have abnormal vibration.

[0085] In some embodiments of the present application, when the second judgment unit determines the vibration score, it includes: when the second judgment unit determines the vibration score according to the mass of the impurity particles and the medium temperature, the vibration score is calculated by the following formula:

[0086]

[0087] Wherein, Z represents the vibration score, γ represents the adjustment coefficient, mz represents the mass of impurity particles, mt represents the total mass of the medium, Tf represents the medium temperature, and T0 represents the initial temperature. γ is preferably 1.

[0088] When the second judgment unit determines the vibration score according to the medium temperature, the vibration score is calculated by the following formula:

[0089]

[0090] Where Z is the vibration score, represents the temperature influence coefficient, Tf represents the medium temperature, T0 represents the initial temperature, and Tmax represents the medium temperature rise threshold. Preferably .

[0091] Specifically, when foreign particles are present in the discharged medium, it indicates that abnormal vibration exists inside the detected part 700, because the vibration causes abnormal friction or wear, and when abnormal friction or wear exists, the medium temperature will be significantly increased compared to normal conditions. The second judgment unit evaluates the vibration condition by detecting the mass of foreign particles in the discharged medium or the medium temperature. When no foreign particles are found in the discharged medium, the detection of vibration depends on the change in the medium temperature. The second judgment unit evaluates whether abnormal vibration exists by calculating the medium heating parameter (i.e., the difference between the current temperature and the initial temperature of the medium).

[0092] It can be understood that by combining the impurity particles in the medium and the temperature parameters, the detection of abnormal vibration is achieved. Compared with a single vibration or temperature detection method, a comprehensive evaluation of the vibration situation is achieved by quantifying the relationship between impurities and temperature changes. The adjustment coefficient and temperature influence coefficient introduced in the formula allow the scoring model to be flexibly adjusted according to the actual working conditions, making the system more adaptable. The accuracy and reliability of the test results are ensured, especially in the case of complex environmental conditions or changeable working conditions, potential mechanical failures can be discovered and warned in time, thereby improving the operating stability and safety of the mechanical sealing system.

[0093] In some embodiments of the present application, when the early warning unit determines the detection score of the detected component 700 according to the sealing ring leakage score and / or the vibration score, the early warning unit determines the detection score by the following formula:

[0094]

[0095] Among them, S represents the detection score, α and β represent the sealing ring leakage weight and vibration weight respectively, and α+β=1, Em represents the sealing ring leakage score, and Z represents the vibration score.

[0096] In some embodiments of the present application, when the early warning unit determines whether to issue an early warning based on the detection score, it includes: when the detection score is not zero, the early warning unit determines to issue an early warning and compares the detection score with a pre-set first preset score and a second preset score respectively, and determines the early warning level according to the comparison result, the first preset score is less than the second preset score, and the first preset score is greater than zero.

[0097] Specifically, when the detection score is greater than zero and less than or equal to the first preset score, the warning unit issues a third-level warning. When the detection score is greater than the first preset score and less than or equal to the second preset score, the warning unit issues a second-level warning. When the detection score is greater than the second preset score, the warning unit issues a first-level warning.

[0098] It can be understood that by comprehensively considering the effects of sealing ring leakage and vibration, a multi-level early warning mechanism is provided, which can more accurately evaluate the health status of the detected part 700. By reasonably setting the weight coefficients of sealing ring leakage and vibration, the detection score is more targeted and can reflect the key risk factors under different working conditions. In addition, the division of early warning levels provides a progressive risk prompt, thereby avoiding overreaction or ignoring potential risks. This embodiment can adjust the early warning response according to the actual operating conditions, improve the safety and reliability of the system, help extend the service life of the equipment and reduce the occurrence of sudden failures.

[0099] In the above-mentioned embodiment, an infrared detection device is used to monitor the infrared images of the static ring and the dynamic ring seals in real time, and the leakage of the seals can be accurately determined through the temperature gradient diagram. The medium circulation device replaces the medium at the end surface liquid film and analyzes the discharged medium to monitor the vibration state of the seal. Through the comprehensive analysis of the impurity particles and temperature changes in the medium, abnormal vibration problems can be effectively identified. In addition, the processing unit in the control device intelligently adjusts the operating power of the drive motor and the interval time of the medium circulation according to the size data of the inspected part to ensure the efficiency and accuracy of the detection process. The early warning unit combines the sealing ring leakage score and the vibration score to achieve a comprehensive evaluation of the inspected part, thereby providing an early warning function, reducing the risk of equipment failure, overcoming the shortcomings of traditional methods, and achieving high-precision detection in a non-contact situation.

[0100] In another preferred embodiment based on the above embodiment, refer to Figure 2 As shown, this embodiment provides a detection method for end face sealing, which is applied to the above-mentioned detection system for end face sealing, including:

[0101] S100: collecting the size data of the inspected part, determining the operating power of the drive motor and the interval time for the medium circulation device to replace the medium at the end surface liquid film according to the size data, and controlling the operating interval time of the drive motor;

[0102] S200: Collecting infrared images corresponding to the stationary ring seal and the dynamic ring seal respectively based on the infrared detection device, processing the infrared images to obtain a temperature gradient map, judging whether there is a leak at the seal according to the temperature gradient map, and determining a seal leakage score according to the temperature gradient map when a leak is determined;

[0103] S300: Control the medium circulation device to replace the medium at the end surface liquid film and analyze the discharged medium, determine whether the inspected part has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determine the vibration score according to the impurities and / or medium temperature when it is determined that abnormal vibration exists.

[0104] S400: Determine the inspection score of the inspected component according to the sealing ring leakage score and / or the vibration score, and determine whether to issue an early warning according to the inspection score.

[0105] It is understandable that the infrared detection device is used to monitor the infrared images of the static ring and the dynamic ring seals in real time, and the leakage of the seals can be accurately determined through the temperature gradient diagram. The medium circulation device replaces the medium at the end surface liquid film and analyzes the discharged medium to monitor the vibration state of the seal. Through the comprehensive analysis of the impurity particles and temperature changes in the medium, abnormal vibration problems can be effectively identified. In addition, the processing unit in the control device intelligently adjusts the operating power of the drive motor and the interval time of the medium circulation according to the size data of the inspected part to ensure the efficiency and accuracy of the inspection process. The early warning unit combines the sealing ring leakage score and the vibration score to achieve a comprehensive evaluation of the inspected part, thereby providing an early warning function, reducing the risk of equipment failure, overcoming the shortcomings of traditional methods, and achieving high-precision detection in a non-contact situation.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A detection system for end face sealing, characterized in that: include: An inspection platform, a driving motor, a fixed base, an infrared detection device, a medium circulation device and a control device; wherein the driving motor and the fixed base are arranged above the inspection platform, one side of the static ring of the inspected part is fixed on the fixed base, one side of the dynamic ring of the inspected part is connected to the driving motor, the infrared detection device is arranged on one side of the inspected part, the infrared detection device is used to detect infrared images at the static ring sealing ring and the dynamic ring sealing ring, the inlet end and the outlet end of the medium circulation device are respectively connected to the inspected part, the medium circulation device is used to circulate the medium at the liquid film on the internal end surface of the inspected part, the control device is connected to the driving motor, the infrared detection device and the medium circulation device, the control device includes a processing unit, a first judgment unit, a second judgment unit and an early warning unit, wherein, The processing unit is configured to collect the size data of the detected part, determine the operating power of the drive motor and the interval time for the medium circulation device to replace the medium at the end surface liquid film according to the size data, and control the drive motor to operate for the interval time; The first judgment unit is configured to collect infrared images corresponding to the static ring seal ring and the dynamic ring seal ring respectively based on the infrared detection device, process the infrared images to obtain a temperature gradient map, judge whether there is a leak at the seal ring according to the temperature gradient map, and determine the seal ring leakage score according to the temperature gradient map when a leak is determined; The second judgment unit is configured to control the medium circulation device to operate the medium at the end surface liquid film and analyze the discharged medium, judge whether the detected part has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determine the vibration score according to the impurities and / or the medium temperature when it is determined that the abnormal vibration exists; The early warning unit is configured to determine the detection score of the detected component according to the sealing ring leakage score and the vibration score, and determine whether to issue an early warning according to the detection score; When the first judging unit judges whether there is leakage at the sealing ring according to the temperature gradient diagram, it includes: The first judgment unit processes the temperature gradient diagram, draws a temperature gradient curve, and performs analysis based on the temperature gradient curve to judge whether there is leakage at the sealing ring; When there are concave points and convex points in the temperature gradient curve, the first judgment unit determines that there is leakage at the sealing ring; When the temperature gradient curve is a smooth curve, the first judgment unit determines that there is no leakage at the sealing ring; When the first judgment unit determines that there is leakage at the sealing ring, determining the sealing ring leakage score according to the temperature gradient diagram includes: The first judgment unit determines the logarithm of the convex points and the concave points according to the temperature gradient map, determines the area ratio of the convex points and the concave points according to the temperature gradient map, and determines the sealing ring leakage score according to the logarithm and the area ratio; Wherein, Em represents the sealing ring leakage score, Nd represents the logarithm, N represents the total number of sampling points, M represents the area ratio, a and b represent the weight coefficients, and a+b=1; When the second judging unit judges whether the detected component has abnormal vibration according to the impurities in the discharged medium and the medium temperature, it includes: When foreign particles exist in the discharged medium, the second judgment unit determines that the detected part has abnormal vibration, and determines the vibration score according to the mass of the foreign particles and the medium temperature; When there are no foreign particles in the discharged medium, the second judgment unit judges whether the detected part has abnormal vibration according to the medium temperature; When the second judging unit judges whether the detected component has abnormal vibration according to the medium temperature, it includes: The second judgment unit obtains a medium temperature rise parameter according to the medium temperature and the initial temperature, compares the medium temperature rise parameter with a medium temperature rise threshold, and judges whether the detected component has abnormal vibration according to the comparison result; When the medium temperature rise parameter is greater than the medium temperature rise threshold, the second judgment unit determines that the detected component has abnormal vibration, and determines the vibration score according to the medium temperature; When the medium temperature rise parameter is less than or equal to the medium temperature rise threshold, the second judgment unit determines that there is no abnormal vibration of the detected component; When the second judgment unit determines the vibration score, it includes: When the second judgment unit determines the vibration score according to the mass of the impurity particles and the medium temperature, the vibration score is calculated by the following formula: Wherein, Z represents the vibration score, γ represents the adjustment coefficient, mz represents the mass of impurity particles, mt represents the total mass of the medium, Tf represents the medium temperature, and T0 represents the initial temperature; When the second judgment unit determines the vibration score according to the medium temperature, the vibration score is calculated by the following formula: Where Z is the vibration score, represents the temperature influence coefficient, Tf represents the medium temperature, T0 represents the initial temperature, and Tmax represents the medium temperature rise threshold.

2. The detection system for end face sealing according to claim 1, characterized in that: When the processing unit determines the operating power of the driving motor and the interval time of the medium circulation device replacing the medium at the end surface liquid film according to the size data, the operating power and the interval time are respectively calculated by the following formulas: Where P represents the operating power, represents the efficiency coefficient, represents the radius of the moving ring, Indicates the maximum speed of the moving ring. It represents the friction coefficient between the moving and static rings, A represents the contact area between the moving and static rings, p represents the maximum pressure borne by the moving ring, and v represents the maximum sliding speed of the moving ring; in, represents the density of the medium, h represents the average thickness of the end surface liquid film, represents the friction coefficient between the moving and static rings, Indicates the maximum speed of the moving ring. represents the radius of the moving ring, and t0 represents the preset standard interval time.

3. The detection system for end face sealing according to claim 1, characterized in that: When the early warning unit determines the inspection score of the inspected component according to the sealing ring leakage score and the vibration score, it includes: The early warning unit determines the detection score by the following formula: Among them, S represents the detection score, α and β represent the sealing ring leakage weight and vibration weight respectively, Em represents the sealing ring leakage score, and Z represents the vibration score.

4. The detection system for end face sealing according to claim 3, characterized in that: When the early warning unit determines whether to issue an early warning according to the detection score, it includes: When the detection score is not zero, the warning unit determines to issue a warning and compares the detection score with a first preset score and a second preset score respectively, and determines a warning level according to the comparison result, the first preset score is less than the second preset score, and the first preset score is greater than zero; When the detection score is greater than zero and less than or equal to a first preset score, the warning unit issues a third-level warning; When the detection score is greater than the first preset score and less than or equal to the second preset score, the warning unit issues a second-level warning; When the detection score is greater than a second preset score, the warning unit issues a first-level warning.

5. A method for detecting end face seal, applied to the detection system for end face seal according to any one of claims 1 to 4, characterized in that: include: Collecting the size data of the detected part, determining the operating power of the driving motor and the interval time for the medium circulation device to replace the medium at the end surface liquid film according to the size data, and controlling the driving motor to operate for the interval time; Based on the infrared detection device, infrared images corresponding to the static ring seal and the dynamic ring seal are respectively collected, and the infrared images are processed to obtain a temperature gradient map, and whether there is a leak at the seal is determined according to the temperature gradient map, and when a leak is determined, a seal leakage score is determined according to the temperature gradient map; Controlling the medium circulation device to operate and replace the medium at the end surface liquid film and analyzing the discharged medium, judging whether the detected part has abnormal vibration according to the impurities in the discharged medium and the medium temperature, and determining the vibration score according to the impurities and / or the medium temperature when it is determined that the abnormal vibration exists; The inspection score of the inspected component is determined according to the sealing ring leakage score and the vibration score, and whether to issue an early warning is determined according to the inspection score.

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