Air bearing wear degree judgment method and device, product, equipment and medium

Abstract

The invention discloses an air bearing wear degree judgment method and device, a product, equipment and a medium. The method comprises the following steps: acquiring the standard shutdown time of the centrifugal compressor in a test when the centrifugal compressor leaves a factory for the first time; setting a shutdown time threshold value when the air bearing of the centrifugal compressor is damaged; detecting the real-time shutdown time when the centrifugal compressor is shut down; according to the ratio of the difference value of the real-time downtime and the standard downtime to the difference value of the real-time downtime and the downtime threshold value, the abrasion degree value of the air bearing of the centrifugal compressor is obtained according to the ratio; and when the abrasion degree value is larger than or equal to a preset abrasion threshold value, it is judged that the air bearing of the centrifugal compressor is abraded. According to the negative correlation relation between the wear degree of the air bearing of the centrifugal compressor and the downtime, the wear degree of the air bearing is judged through control software, and the wear state of the air bearing of the centrifugal compressor can be monitored in real time.

Description

Technical Field

[0001] The present application relates to the technical field of centrifugal compressors, and in particular to a method, device, product, equipment and medium for determining the degree of wear of an air bearing. Background Art

[0002] Centrifugal compressors are widely used in various industrial fields, among which air bearings, as key components, undertake the important task of supporting and lubricating the rotor. However, air bearings will gradually fail due to wear during long-term operation, which in turn affects the performance and stability of the compressor. At present, the judgment of the degree of wear of air bearings mainly relies on regular inspections and maintenance. This method is not only time-consuming and labor-intensive, but also difficult to monitor the wear status of air bearings in real time. The current solution mainly involves disassembling the machine to check the wear condition, which is very inconvenient and inaccurate. Therefore, it is of great significance to develop a method and device that can monitor the degree of wear of air bearings in real time. Summary of the Invention

[0003] Based on this, a method, device, product, equipment and medium for judging the wear degree of an air bearing are provided to solve the technical problem that it is difficult to monitor the wear state of the air bearing of a centrifugal compressor in real time.

[0004] In one aspect, a method for determining the degree of wear of an air bearing is provided, the method comprising: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0005] In one embodiment, the step of detecting the real-time downtime of the centrifugal compressor when it is shut down comprises: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0006] In one embodiment, the counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down comprises: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

[0007] In one embodiment, the method for determining the degree of wear of the air bearing further includes: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0008] In one embodiment, obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0009] In one embodiment, the method for determining the degree of wear of the air bearing further includes: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, wherein a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), and w represents the correction weight.

[0010] On the other hand, a device for determining the degree of wear of an air bearing is provided, the device comprising: A standard downtime acquisition module is used to acquire the standard downtime of the centrifugal compressor when it is tested at the first factory; A downtime threshold setting module, used to set a downtime threshold when the air bearing of the centrifugal compressor is damaged; A real-time downtime detection module, configured to detect the real-time downtime of the centrifugal compressor when it stops; a wear degree value calculation module, configured to obtain a wear degree value of the air bearing of the centrifugal compressor according to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold; The wear judgment module is used to determine that the air bearing of the centrifugal compressor is worn when the wear degree value is greater than or equal to a preset wear threshold.

[0011] In another aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the following steps are implemented: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0012] In another aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0013] The above-mentioned method, device, product, equipment and medium for judging the degree of wear of the air bearing can infer the degree of wear of the air bearing of the centrifugal compressor by monitoring the downtime of the centrifugal compressor based on the negative correlation between the degree of wear of the air bearing of the centrifugal compressor and the downtime. The judgment of the degree of wear of the air bearing is realized through control software, and the wear status of the air bearing of the centrifugal compressor can be monitored in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a diagram of the application environment of a method for determining the wear degree of an air bearing in one embodiment of the present application; Figure 2 This is a flow chart of a method for determining the degree of wear of an air bearing in one embodiment of the present application; Figure 3 This is a structural block diagram of a device for determining the degree of wear of an air bearing in one embodiment of the present application; Figure 4 This is a diagram of the internal structure of a computer device in one embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0017] To solve the above problems, the present invention creatively proposes a method for determining the degree of wear of an air bearing. When the degree of wear of an air bearing is determined by the free downtime of the compressor, the degree of wear is negatively correlated with the downtime. Specifically, 1) Increased wear leading to shorter downtime When air bearings wear out, their load-bearing capacity and lubrication properties decrease, and frictional resistance increases. When the compressor is powered off, the rotor stops faster due to increased frictional resistance, significantly shortening the free-wheeling time.

[0018] 2) Downtime characteristics under normal conditions Unworn air bearing surfaces maintain an intact fluid lubrication film, resulting in an extremely low coefficient of friction. This allows the rotor to rotate freely for a longer period of time after power is removed due to inertia. This phenomenon is an important indicator of bearing health.

[0019] The method for judging the degree of wear of an air bearing provided in this application can be applied to Figure 1 In the application environment shown, the controller is connected to the motor of the centrifugal compressor, and the controller detects the motor line voltage of the centrifugal compressor in real time. When the motor line voltage is the driving voltage of the rated power, the centrifugal compressor is at the operating speed, and when the motor line voltage is zero, the centrifugal compressor speed is zero.

[0020] In one embodiment, Figure 2 As shown, a method for determining the degree of wear of an air bearing is provided, comprising the following steps: Step S1, obtaining a standard stop time StopTime1 of the centrifugal compressor when it is tested at the first time of leaving the factory; Step S2, setting a stop time threshold StopTimeTh of the air bearing of the centrifugal compressor when it is damaged; Step S3, detecting the real-time stop time StopTime of the centrifugal compressor when it stops; Step S4, obtaining a wear degree value a of the air bearing of the centrifugal compressor according to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold; Step S5: When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0021] Since the degree of wear of the centrifugal compressor's air bearing is negatively correlated with the downtime, StopTimeTh < StopTime1, and StopTime ≤ StopTime1. The greater the wear, the shorter the downtime. In other words, if the air bearing wears during subsequent use, StopTime will always be less than the initial downtime duration, StopTime1, i.e., StopTime ≤ StopTime1.

[0022] Based on the negative correlation between the degree of wear of the air bearing of the centrifugal compressor and the downtime, the present application can infer the degree of wear of the air bearing of the centrifugal compressor by monitoring the downtime of the centrifugal compressor. The judgment of the degree of wear of the air bearing is realized through control software, and the wear status of the air bearing of the centrifugal compressor can be monitored in real time.

[0023] In this embodiment, the step of detecting the real-time downtime of the centrifugal compressor when it is shut down includes: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0024] The motor line voltage of the centrifugal compressor is a back electromotive force line voltage, not a driving voltage.

[0025] In this embodiment, the counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down includes: Obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold SpeedTh; When the centrifugal compressor is stopped, the time duration for the motor speed of the centrifugal compressor to decrease from the wear detection threshold SpeedTh to zero is calculated as the real-time stop time StopTime of the centrifugal compressor when it is stopped.

[0026] The wear check threshold SpeedTh is set to be slightly higher than the take-off speed, that is, preferably 1.0<first ratio<1.2.

[0027] In this embodiment, the method for determining the degree of wear of the air bearing further includes: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0028] In this embodiment, obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0029] Furthermore, in this embodiment, the method for determining the degree of wear of the air bearing further includes: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, where a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), w represents the correction weight, StopTime represents the real-time downtime, StopTime1 represents the standard downtime, and StopTimeTh represents the downtime threshold.

[0030] Among them, the operating time and the number of maintenance times will directly affect the wear degree of the air bearing. By determining the correction weight w of the wear degree value a of the air bearing based on the operating time and the number of maintenance times of the centrifugal compressor as a correction factor, the prediction accuracy of the wear degree value of the air bearing can be improved.

[0031] In the above-mentioned method for judging the degree of wear of the air bearing, based on the negative correlation between the degree of wear of the air bearing of the centrifugal compressor and the downtime, the degree of wear of the air bearing of the centrifugal compressor can be inferred by monitoring the downtime of the centrifugal compressor. The judgment of the degree of wear of the air bearing is realized by control software, and the wear status of the air bearing of the centrifugal compressor can be monitored in real time.

[0032] In one embodiment, Figure 3 As shown, an air bearing wear degree judgment device 10 is provided, including: a standard downtime acquisition module 1, a downtime threshold setting module 2, a real-time downtime detection module 3, a wear degree value calculation module 4, and a wear judgment module 5.

[0033] The standard downtime acquisition module 1 is used to acquire the standard downtime of the centrifugal compressor when it is tested at the first time leaving the factory.

[0034] The downtime threshold setting module 2 is used to set a downtime threshold when the air bearing of the centrifugal compressor is damaged.

[0035] The real-time downtime detection module 3 is used to detect the real-time downtime of the centrifugal compressor when it is shut down.

[0036] The wear degree value calculation module 4 is used to obtain the wear degree value of the air bearing of the centrifugal compressor according to the ratio of the difference between the real-time downtime and the standard downtime to the difference between the real-time downtime and the downtime threshold.

[0037] The wear judgment module 5 is configured to determine that the air bearing of the centrifugal compressor is worn when the wear degree value is greater than or equal to a preset wear threshold.

[0038] In this embodiment, the step of detecting the real-time downtime of the centrifugal compressor when it is shut down includes: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0039] In this embodiment, the counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down includes: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

[0040] In this embodiment, the method for determining the degree of wear of the air bearing further includes: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0041] In this embodiment, obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0042] In this embodiment, the wear judgment module 5 is further configured to: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, where a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), w represents the correction weight, StopTime represents the real-time downtime, StopTime1 represents the standard downtime, and StopTimeTh represents the downtime threshold.

[0043] In the above-mentioned air bearing wear degree judgment device, based on the negative correlation between the wear degree of the air bearing of the centrifugal compressor and the downtime, the wear degree of the air bearing of the centrifugal compressor can be inferred by monitoring the downtime of the centrifugal compressor. The judgment of the wear degree of the air bearing is realized through the control software, and the wear status of the air bearing of the centrifugal compressor can be monitored in real time.

[0044] The specific limitations of the air bearing wear determination device can be found in the limitations of the air bearing wear determination method described above and will not be further elaborated here. Each module within the aforementioned air bearing wear determination device can be implemented in whole or in part via software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor within a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0045] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0046] In one embodiment, the computer program further performs the following steps when executed by a processor: The step of detecting the real-time downtime of the centrifugal compressor when it stops comprises: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0047] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: The counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down comprises: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

[0048] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0049] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: The step of obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0050] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, where a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), w represents the correction weight, StopTime represents the real-time downtime, StopTime1 represents the standard downtime, and StopTimeTh represents the downtime threshold.

[0051] For specific limitations on the steps implemented when the computer program is executed by the processor, please refer to the above limitations on the method for determining the degree of wear of the air bearing, which will not be repeated here.

[0052] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store air bearing wear degree judgment data. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for judging the degree of air bearing wear is implemented.

[0053] Those skilled in the art will understand that Figure 4The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0054] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are performed: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0055] In one embodiment, when the processor executes the computer program, the processor further implements the following steps: The step of detecting the real-time downtime of the centrifugal compressor when it stops comprises: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0056] In one embodiment, when the processor executes the computer program, the processor further implements the following steps: The counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down comprises: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

[0057] In one embodiment, when the processor executes the computer program, the processor further implements the following steps: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0058] In one embodiment, when the processor executes the computer program, the processor further implements the following steps: The step of obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0059] In one embodiment, when the processor executes the computer program, the processor further implements the following steps: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, where a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), w represents the correction weight, StopTime represents the real-time downtime, StopTime1 represents the standard downtime, and StopTimeTh represents the downtime threshold.

[0060] For specific limitations on the steps implemented when the processor executes the computer program, please refer to the above limitations on the method for determining the degree of wear of the air bearing, which will not be repeated here.

[0061] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

[0062] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: The step of detecting the real-time downtime of the centrifugal compressor when it stops comprises: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

[0063] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: The counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down comprises: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

[0064] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

[0065] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: The step of obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

[0066] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, where a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), w represents the correction weight, StopTime represents the real-time downtime, StopTime1 represents the standard downtime, and StopTimeTh represents the downtime threshold.

[0067] For specific limitations on the steps implemented when the computer program is executed by the processor, please refer to the above limitations on the method for determining the degree of wear of the air bearing, which will not be repeated here.

[0068] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0069] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are intended to fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining the degree of wear of an air bearing, characterized in that: include: Obtain the standard downtime of centrifugal compressors tested when first leaving the factory; Setting a downtime threshold for an air bearing of the centrifugal compressor when it is damaged; Detecting the real-time downtime of the centrifugal compressor when it stops; According to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold, obtaining a wear degree value of an air bearing of the centrifugal compressor according to the ratio; When the wear degree value is greater than or equal to a preset wear threshold, it is determined that the air bearing of the centrifugal compressor is worn.

2. The method for judging the degree of wear of an air bearing according to claim 1, wherein: The step of detecting the real-time downtime of the centrifugal compressor when it stops comprises: When the centrifugal compressor is shut down, the motor line voltage of the centrifugal compressor is detected in real time, and the time length for the motor line voltage of the centrifugal compressor to drop to zero is counted as the real-time shutdown time of the centrifugal compressor when it is shut down.

3. The method for judging the degree of wear of an air bearing according to claim 2, wherein: The counting of the time duration during which the motor line voltage of the centrifugal compressor drops to zero as the real-time downtime of the centrifugal compressor when the centrifugal compressor is shut down comprises: obtaining a takeoff speed of an air bearing of the centrifugal compressor, and increasing the takeoff speed by a preset multiple as a wear inspection threshold; When the centrifugal compressor is shut down, the time duration for the motor speed of the centrifugal compressor to decrease from the wear inspection threshold to zero is calculated as the real-time shutdown time of the centrifugal compressor.

4. The method for determining the degree of wear of an air bearing according to claim 1, wherein: The method for determining the degree of wear of the air bearing further comprises: Setting the wear level of the air bearing to include high wear level, medium wear level and low wear level; In response to determining that the air bearing of the centrifugal compressor is worn, obtaining a wear degree value of the air bearing of the centrifugal compressor; When the wear degree value is greater than a first threshold, determining that the wear level of the air bearing of the centrifugal compressor is a high wear level; When the wear degree value is less than a second threshold, determining that the wear level of the air bearing of the centrifugal compressor is a low wear level; When the wear degree value is between the first threshold value and the second threshold value, determining that the wear level of the air bearing of the centrifugal compressor is a medium wear level; An early warning message is issued according to the wear level of the air bearing wear degree.

5. The method for judging the degree of wear of an air bearing according to claim 1, wherein: The step of obtaining the wear degree value of the air bearing of the centrifugal compressor according to the ratio includes: The wear degree value of the air bearing of the centrifugal compressor is calculated by a=(StopTime-StopTime1) / (StopTime-StopTimeTh), where a represents the wear degree value of the air bearing, StopTime represents the real-time stop time, StopTime1 represents the standard stop time, and StopTimeTh represents the stop time threshold.

6. The method for determining the degree of wear of an air bearing according to claim 5, wherein: The method for determining the degree of wear of the air bearing further comprises: Using the operating time and the number of maintenance times of the centrifugal compressor as correction factors, and determining a correction weight w according to the operating time and the number of maintenance times; The wear degree value a of the air bearing of the centrifugal compressor is obtained according to the ratio and the correction weight, wherein a=(1+w)(StopTime-StopTime1) / (StopTime-StopTimeTh), and w represents the correction weight.

7. A device for determining the degree of wear of an air bearing, characterized in that: The device comprises: A standard downtime acquisition module is used to acquire the standard downtime of the centrifugal compressor when it is tested at the first factory; a downtime threshold setting module, configured to set a downtime threshold when the air bearing of the centrifugal compressor is damaged; A real-time downtime detection module, configured to detect the real-time downtime of the centrifugal compressor when it is shut down; a wear degree value calculation module, configured to obtain a wear degree value of the air bearing of the centrifugal compressor according to a ratio of a difference between the real-time downtime and the standard downtime to a difference between the real-time downtime and the downtime threshold; The wear judgment module is used to determine that the air bearing of the centrifugal compressor is worn when the wear degree value is greater than or equal to a preset wear threshold.

8. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method for determining the degree of wear of an air bearing according to any one of claims 1 to 6 are implemented.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for determining the degree of wear of an air bearing according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the degree of wear of an air bearing according to any one of claims 1 to 6 are implemented.

Images