Thrust plate fault monitoring device, magnetic suspension compressor and air conditioning equipment

Abstract

The utility model provides a thrust plate fault monitoring device, a magnetic suspension compressor and air conditioning equipment, the thrust plate fault monitoring device comprises a first distance monitoring device, a second distance monitoring device and a fault analysis device, the first distance monitoring device is electrically connected with the fault analysis device, the second distance monitoring device is electrically connected with the fault analysis device, and the fault analysis device is electrically connected with the magnetic suspension compressor. The first distance monitoring device is used for monitoring first distance information between the radial first end of the thrust plate and the first distance monitoring device, the second distance monitoring device is used for monitoring second distance information between the radial second end of the thrust plate and the second distance monitoring device, and then the thrust plate is monitored according to the first distance monitoring information and the second distance monitoring information. According to the method, fault analysis is conducted on the thrust plate, faults of the thrust plate can be more conveniently checked, the fault state of the thrust plate can be effectively judged under the condition that the compressor is not disassembled, the situation that the compressor cannot operate due to the fact that the thrust plate is abnormal is avoided, and the time cost for checking the abnormity of the compressor is saved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and in particular to a thrust plate fault monitoring device, a magnetic suspension compressor, and air conditioning equipment. Background Art

[0002] The thrust plate is an important component for maintaining the relative position of the rotor and the mounting housing inside the magnetic levitation compressor. Its main function is to withstand the impact caused by the axial displacement of the rotor during operation, and to determine and maintain the relative position between the rotor and the mounting housing. The thrust plate balances the axial force of the entire rotor. Once it becomes abnormal, it affects the axial control, the rotor will move, reduce the accuracy of the bearing operation, and even cause equipment damage. Since the thrust plate is inside the compressor, it is generally difficult to troubleshoot if it becomes abnormal, and it is often necessary to disassemble the compressor to observe the problem. Utility Model Content

[0003] In view of this, in order to solve the technical problem that it is difficult to troubleshoot thrust plate failures in the prior art, the present invention provides a thrust plate failure monitoring device, a magnetic levitation compressor, and an air conditioning device.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a thrust plate fault monitoring device, the thrust plate fault monitoring device comprising a first distance monitoring device, a second distance monitoring device and a fault analysis device, the first distance monitoring device being electrically connected to the fault analysis device, the second distance monitoring device being electrically connected to the fault analysis device;

[0005] The first distance monitoring device is configured to monitor first distance information between a radial first end of the thrust plate and the first distance monitoring device, and transmit the monitored first distance information to the fault analysis device;

[0006] The second distance monitoring device is configured to monitor second distance information between the radial second end of the thrust plate and the second distance monitoring device, and transmit the monitored second distance information to the fault analysis device;

[0007] The fault analysis device is configured to receive the first distance information and the second distance information, and perform a fault analysis on the thrust plate based on the first distance information and the second distance information;

[0008] The radial first end and the radial second end are two ends of the thrust plate that are radially opposite to each other.

[0009] In an alternative embodiment,

[0010] When the thrust plate fault monitoring device is applied to a magnetic levitation compressor, in the axial direction of the thrust plate, the first distance monitoring device and the second distance monitoring device are fixedly installed on the first side of the thrust plate, and the first side is the side where the front axial bearing of the magnetic levitation compressor is located relative to the thrust plate.

[0011] In an alternative embodiment,

[0012] The first distance monitoring device and the second distance monitoring device are respectively fixed on a fixing device of the magnetic levitation compressor, and the fixing device includes a device fixed relative to the front axial bearing.

[0013] In an alternative embodiment,

[0014] The fixing device comprises the front axial bearing and / or the housing of the magnetically suspended compressor.

[0015] In an alternative embodiment,

[0016] The first distance monitoring device and the second distance monitoring device are respectively connected to the fixing device by welding and / or bonding.

[0017] In an alternative embodiment,

[0018] The thrust plate fault monitoring device includes a display device, which is electrically connected to the fault analysis device, and the display device is configured to display information based on information transmitted by the fault analysis device.

[0019] In an alternative embodiment,

[0020] The display device includes an oscilloscope.

[0021] In an alternative embodiment,

[0022] The first distance monitoring device and / or the second distance monitoring device comprises a displacement sensor.

[0023] According to a second aspect of an embodiment of the present disclosure, a magnetic levitation compressor is provided, wherein the magnetic levitation compressor comprises a thrust plate and a thrust plate fault monitoring device as described in any one of the first aspects.

[0024] According to a third aspect of an embodiment of the present disclosure, an air-conditioning device is provided, comprising the magnetic levitation compressor as described in the second aspect.

[0025] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: in the present disclosure, a first distance monitoring device is used to monitor first distance information between a radial first end of the thrust plate and the first distance monitoring device, and a second distance monitoring device is used to monitor second distance information between a radial second end of the thrust plate and the second distance monitoring device, and then a fault analysis of the thrust plate is performed based on the first distance monitoring information and the second distance monitoring information, which makes it easier to troubleshoot faults of the thrust plate, and can effectively determine the fault state of the thrust plate without disassembling the compressor, thereby avoiding the inability to operate the compressor due to abnormalities in the thrust plate, and saving the time cost of troubleshooting abnormalities in the compressor.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] Figure 1 It is a structural schematic diagram showing a thrust plate fault monitoring device applied to a magnetic suspension compressor according to an exemplary embodiment.

[0031] Figure 2 1 is a schematic diagram of a waveform when a thrust plate becomes loose according to an exemplary embodiment.

[0032] Figure 3 1 is a waveform diagram showing a thrust plate not being loosened according to an exemplary embodiment.

[0033] Figure 4 1 is a waveform diagram showing a thrust plate not tilted according to an exemplary embodiment.

[0034] Figure 5 1 is a schematic diagram of a waveform when a thrust plate is tilted according to an exemplary embodiment.

[0035] Figure 6 It is a schematic structural diagram showing a thrust plate tilting according to an exemplary embodiment.

[0036] Figure 7 is a waveform diagram showing a thrust plate without axial displacement according to an exemplary embodiment.

[0037] Figure 8 1 is a schematic diagram of a waveform when the thrust plate undergoes axial displacement according to an exemplary embodiment.

[0038] Fig. 9 It is a schematic structural diagram showing a thrust plate when axial rearward movement occurs according to an exemplary embodiment.

[0039] Fig.10 It is a schematic structural diagram showing a thrust plate when axial forward movement occurs according to an exemplary embodiment.

[0040] Fig.11 It is a schematic diagram showing the principle of a thrust plate failure analysis method according to an exemplary embodiment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] The disclosure below provides many different embodiments or examples for implementing different schemes of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0043] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0045] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0046] In order to solve the technical problem that it is difficult to troubleshoot thrust plate failures in the prior art, the present invention provides a thrust plate failure monitoring device and method, a magnetic levitation compressor, and air conditioning equipment.

[0047] Among them, in the present disclosure, a first distance monitoring device is used to monitor the first distance information between the radial first end of the thrust plate and the first distance monitoring device, and a second distance monitoring device is used to monitor the second distance information between the radial second end of the thrust plate and the second distance monitoring device. Then, the thrust plate is subjected to fault analysis through the above-mentioned first distance monitoring information and second distance monitoring information, which makes it easier to troubleshoot the fault of the thrust plate. It is possible to effectively determine the fault state of the thrust plate without disassembling the compressor, thereby avoiding the inability to operate the compressor due to the abnormality of the thrust plate, and saving the time cost of troubleshooting the abnormality of the compressor.

[0048] In an exemplary embodiment, a thrust plate fault monitoring device and a thrust plate fault monitoring method are provided. The thrust plate fault monitoring device and the thrust plate fault monitoring method can be applied to a magnetic suspension compressor or other equipment, without limitation.

[0049] refer to Figure 1 As shown, the thrust plate fault monitoring device may include a first distance monitoring device 1, a second distance monitoring device 2 and a fault analysis device 3. The first distance monitoring device 1 is electrically connected to the fault analysis device 3, and the second distance monitoring device 2 is electrically connected to the fault analysis device 3.

[0050] The first distance monitoring device 1 is configured to monitor first distance information between the radial first end of the thrust plate 10 and the first distance monitoring device 1 , and transmit the monitored first distance information to the fault analysis device 3 .

[0051] That is, the first distance monitoring device 1 can detect the distance value between the radial first end of the thrust plate 10 and the first distance monitoring device 1 in real time, and transmit the detected distance value to the fault analysis device 3 .

[0052] Among them, multiple of the above distance values ​​can constitute the first distance information, that is, the first distance monitoring device 1 can monitor the first distance information between the radial first end of the thrust plate 10 and the first distance monitoring device 1, and can transmit the above first distance information to the fault analysis device 3.

[0053] The second distance monitoring device 2 is configured to monitor the second distance information between the radial second end of the thrust plate 10 and the second distance monitoring device 2 , and transmit the monitored second distance information to the fault analysis device 3 .

[0054] That is, the second distance monitoring device 2 can detect the distance value between the radial second end of the thrust plate 10 and the second distance monitoring device 2 in real time, and transmit the detected distance value to the fault analysis device 3 .

[0055] Among them, multiple of the above distance values ​​can constitute the second distance information, that is, the second distance monitoring device 2 can monitor the second distance information between the radial second end of the thrust plate 10 and the second distance monitoring device 2, and can transmit the above second distance information to the fault analysis device 3.

[0056] It should be noted that the radial first end and the radial second end are two ends of the thrust plate 10 that are radially opposite to each other, and the distance between the radial first end and the center of the thrust plate 10 is equal to the distance between the radial second end and the center of the thrust plate 10. That is, the line connecting the radial first end and the radial second end is on the straight line where the diameter of the thrust plate 10 is located, and the radial first end and the radial second end can be on the same plane and can be symmetrical about the center of the thrust plate 10. The distance between the radial first end and the radial second end can be the diameter of the thrust plate 10 at most.

[0057] The fault analysis device 3 is configured to receive the first distance information and the second distance information, and perform a fault analysis on the thrust plate 10 based on the first distance information and the second distance information.

[0058] That is, the fault analysis device 3 can receive the first distance information monitored by the first distance monitoring device 1, and can also receive the second distance information monitored by the second distance monitoring device 2. After the fault analysis device 3 obtains the first distance information and the second distance information, it can perform fault analysis on the thrust plate 10 based on the first distance information and the second distance information, so as to determine whether the thrust plate 10 has a fault, and even determine the fault type of the thrust plate 10 when the thrust plate 10 has a fault.

[0059] In some embodiments,

[0060] Under normal circumstances, when the thrust plate 10 is not loose, the first distance information may form a regular sine waveform, and the second distance information may also form a regular sine waveform.

[0061] In view of this, in this embodiment, when the first distance information and / or the second distance information constitutes an irregular waveform, it can be determined that the thrust plate 10 has a fault, and it can also be determined that the thrust plate 10 has a loose fault.

[0062] In some embodiments,

[0063] Under normal circumstances, when the thrust plate 10 does not have a tilt failure, the distance value in the first distance information may be within a certain distance range, and the distance value in the second distance information may also be within a certain range.

[0064] In view of this, in this embodiment, when the distance value in the first distance information and / or the second distance information exceeds the range of the corresponding distance threshold, it can be determined that the thrust plate 10 has a fault, and it can also be determined that the thrust plate 10 has a tilt fault.

[0065] It should be noted that, in addition to the above-mentioned method, the thrust plate 10 may also be analyzed for failure in other ways, which are not limited thereto.

[0066] In this embodiment, a first distance monitoring device 1 is used to monitor first distance information between a radial first end of the thrust plate 10 and the first distance monitoring device 1, and a second distance monitoring device 2 is used to monitor second distance information between a radial second end of the thrust plate 10 and the second distance monitoring device 2. Then, a fault analysis of the thrust plate 10 is performed based on the first distance monitoring information and the second distance monitoring information. This makes it easier to troubleshoot the fault of the thrust plate 10, and can effectively determine the fault state of the thrust plate 10 without disassembling the compressor, thereby avoiding the inability of the compressor to operate due to an abnormality of the thrust plate 10, thereby saving the time cost of troubleshooting the compressor abnormality.

[0067] In an exemplary embodiment, a thrust plate fault monitoring device and a thrust plate fault monitoring method are provided. The thrust plate fault monitoring device and the thrust plate fault monitoring method can be applied to a magnetic suspension compressor or other equipment, without limitation.

[0068] refer to Figure 1 As shown, the magnetic levitation compressor may include a rotor 30, a motor 40, a front axial bearing 20, a thrust plate 10, and a rear axial bearing 50, wherein the front axial bearing 20 and the rear axial bearing 50 are respectively located on two opposite sides of the thrust plate 10. The side where the front axial bearing 20 is located is the first side, which may also be referred to as the front side. The side where the rear axial bearing 50 is located is the second side, which may also be referred to as the rear side.

[0069] Among them, when the thrust plate fault monitoring device is applied to the magnetic suspension compressor, in the axial direction of the thrust plate 10, the first distance monitoring device 1 and the second distance monitoring device 2 are fixedly installed on the first side of the thrust plate 10. The first side is the side where the front axial bearing 20 of the magnetic suspension compressor is located relative to the thrust plate 10. That is to say, in the axial direction, the first distance monitoring device 1, the second distance monitoring device 2 and the front axial bearing 20 are all located on the same side of the thrust plate 10.

[0070] The fault analysis device 3 may include a controller of the magnetic levitation compressor. The first distance monitoring device 1 and the second distance monitoring device 2 are installed on the front side of the thrust plate 10, which can facilitate the placement of the first distance monitoring device 1 and the second distance monitoring device 2, and also facilitate the electrical connection between the controller and the first distance monitoring device 1 and the second distance monitoring device 2.

[0071] The first distance monitoring device 1 and the second distance monitoring device 2 can be fixed on the fixing device of the magnetic levitation compressor respectively. The fixing device may include a device fixed relative to the front axial bearing 20. For example, the fixing device can be the front axial bearing 20, or the housing of the magnetic levitation compressor, or other devices, which are not limited to this. Fixing the first distance monitoring device 1 and the second distance monitoring device 2 to the fixing device can better ensure the reliability of the monitored distance information.

[0072] For example, the first distance monitoring device 1 and the second distance monitoring device 2 are fixed to the front axial bearing 20 , and the first distance monitoring device 1 and the second distance monitoring device 2 are respectively located at two opposite ends of the front axial bearing 20 .

[0073] The first distance monitoring device 1 and the second distance monitoring device 2 may be respectively connected to the fixing device by welding, respectively connected to the fixing device by adhesive, or connected by other means, which is not limited thereto.

[0074] It should be noted that when the first distance monitoring device 1 and the second distance monitoring device 2 are fixedly installed on the front axial bearing 20 , they are generally fixedly installed without destroying the integrity of the front axial bearing 20 .

[0075] The first distance monitoring device 1 and / or the second distance monitoring device 2 may include a displacement sensor to detect distance information. Of course, the first distance monitoring device 1 and / or the second distance monitoring device 2 may also include other devices for detecting distance, which is not limited thereto.

[0076] The displacement sensor may be an eddy current displacement sensor, an inductive displacement sensor, or other types of displacement sensors, which are not limited thereto.

[0077] The principle of eddy current displacement sensor is to accurately measure the relative position of the measured object (must be a metal conductor) and the probe end face through the principle of eddy current effect. It is characterized by good long-term working reliability, high sensitivity, strong anti-interference ability, non-contact measurement, fast response speed, and is not affected by media such as oil and water. It is often used for long-term real-time monitoring of parameters such as shaft displacement, shaft vibration, and shaft speed of large rotating machinery. It can analyze the working condition and cause of failure of the equipment, and effectively protect and pre-repair the equipment.

[0078] The working principle of inductive sensor is electromagnetic induction. It is a device that converts the measured value, such as displacement, into a change in inductance. According to the different conversion methods, it can be divided into self-inductance type (including variable reluctance type and eddy current type) and mutual inductance type (differential transformer type).

[0079] In this embodiment, when the thrust plate fault monitoring device is applied to the magnetic suspension compressor, the first distance monitoring device 1 and the second distance monitoring device 2 can be installed on the first side of the thrust plate 10, which is convenient for the placement of the first distance monitoring device 1 and the second distance monitoring device 2, so as to facilitate the electrical connection between the fault analysis device 3 and the first distance monitoring device 1 and the second distance monitoring device 2. In addition, by fixing the first distance monitoring device 1 and the second distance monitoring device 2 to the fixing device, the first distance information and the second distance information can be well monitored, and the accuracy of the distance information can be better guaranteed.

[0080] In an exemplary embodiment, a thrust plate fault monitoring device and a thrust plate fault monitoring method are provided. The thrust plate fault monitoring device and the thrust plate fault monitoring method can be applied to a magnetic suspension compressor or other equipment, without limitation.

[0081] refer to Figure 1 As shown, when the first distance monitoring device 1 monitors the first distance information, and the second distance monitoring device 2 monitors the second distance information, the fault analysis device 3 can process the first distance information to obtain the corresponding first waveform, and the fault analysis device 3 can process the second distance information to obtain the corresponding second waveform. Generally, the first waveform and the second waveform should be regular sinusoidal waveforms.

[0082] In some embodiments,

[0083] When the first waveform is an irregular waveform (i.e., the first distance information is irregular waveform information), and / or when the second waveform is an irregular waveform (i.e., the second distance information is irregular waveform information), it can be considered that the thrust plate 10 has a fault, and it can be determined that the thrust plate 10 is loose. When the first waveform and the second waveform are both regular sinusoidal waveforms, it is considered that the thrust plate 10 is not loose.

[0084] In this embodiment, as long as any one of the first waveform and the second waveform is irregular, it can be considered that the thrust plate 10 is loose, which can effectively prevent the thrust plate 10 from working in a loose state.

[0085] In some embodiments,

[0086] When both the first waveform and the second waveform are irregular waveforms, it can be considered that the thrust plate 10 has a fault and can be determined to be loose. When the first waveform is a regular waveform and / or when the second waveform is a regular waveform, it can be considered that the thrust plate 10 is not loose.

[0087] In this embodiment, only when both the first waveform and the second waveform are irregular can it be considered that the thrust plate 10 is loose, which can better avoid misjudgment.

[0088] It should be noted that, in addition to performing fault analysis in the above-mentioned manner, fault analysis may also be performed in other manners, which are not limited thereto.

[0089] In this embodiment, the axial center distance monitoring information of the thrust plate 10 can also be obtained by using a conventional axial displacement monitoring device for monitoring axial displacement in a magnetic levitation compressor. The axial displacement monitoring device can generally directly monitor the axial displacement of the thrust plate 10, but the detection accuracy is poor.

[0090] In general, the waveform corresponding to the axial displacement monitoring information is also a regular waveform. Therefore, in this embodiment, it is possible to first determine whether the axial displacement monitoring information, the first distance information, and the second distance information are regular waveform information to determine whether the thrust plate 10 is loose.

[0091] In some embodiments,

[0092] If at least one of the axial center distance monitoring information, the first distance information, and the second distance information is determined to be irregular waveform information, it is determined that the thrust plate 10 is loose. If the axial center distance monitoring information, the first distance information, and the second distance information of the thrust plate 10 are determined to be regular waveform information, it is determined that the thrust plate 10 is not loose.

[0093] In this implementation, as long as there is irregular waveform information in the axial center distance monitoring information, the first distance information, and the second distance information, it can be considered that the thrust plate 10 is loose, which can effectively prevent the thrust plate 10 from working in a loose state.

[0094] In some embodiments,

[0095] refer to Figure 2 As shown, if it is determined that the axial center distance monitoring information, the first distance information, and the second distance information are respectively irregular waveform information, it is determined that the thrust plate 10 is loose. Figure 3 As shown, if at least one of the axial center distance monitoring information, the first distance information, and the second distance information of the thrust plate 10 is determined to be regular waveform information, it is determined that the thrust plate 10 is not loose.

[0096] In this implementation, only when the axial center distance monitoring information, the first distance information and the second distance information are all irregular waveform information, can it be considered that the thrust plate 10 is loose, which can better avoid misjudgment.

[0097] It should be noted that Figure 2 and Figure 3 The dashed lines in represent the corresponding maximum and minimum thresholds.

[0098] In some embodiments,

[0099] If it is determined that the number of regular waveform information is greater than the number of irregular waveform information in the axial center distance monitoring information, the first distance information, and the second distance information, it is determined that the thrust plate 10 is not loose. If it is determined that the number of regular waveform information is less than the number of irregular waveform information in the axial center distance monitoring information, the first distance information, and the second distance information, it is determined that the thrust plate 10 is loose.

[0100] In this embodiment, only when the number of regular waveform information in the axial center distance monitoring information, the first distance information and the second distance information is less than the number of irregular waveform information, can it be determined that the thrust plate 10 is loose, which can better avoid misjudgment and prevent the thrust plate 10 from working in a loose state.

[0101] It should be noted that if the waveform corresponding to the axial center distance monitoring information is a regular waveform, the axial center distance monitoring information is considered to be regular waveform information; if the waveform corresponding to the axial center distance monitoring information is an irregular waveform, the axial center distance monitoring information is considered to be irregular waveform information. The regularity judgment of the first distance information and the second distance information can refer to the axial center distance monitoring information, which will not be elaborated on.

[0102] In this embodiment, after it is determined that the thrust plate 10 is not loose, further fault analysis can be performed on the thrust plate 10 .

[0103] Among them, the first difference information between the first distance information and the second distance information can be determined based on the first distance information and the second distance information. For example, each time the first distance monitoring device 1 detects a distance value, the second distance monitoring device 2 can also detect a distance value. The above two distance values ​​can be recorded as two corresponding distance values. In the first distance information and the second distance information, the difference between all the two corresponding distance values ​​can constitute the above first difference information.

[0104] It should be noted that, generally, the waveform corresponding to the first difference information is not a regular waveform, and the difference in the first difference information is generally within a certain range.

[0105] In this embodiment, according to actual conditions, the first difference threshold when the thrust plate 10 is not tilted can be determined, and the first difference threshold can include a maximum threshold and a minimum threshold. When the thrust plate 10 is not tilted, the differences in the first difference information must not exceed the first difference threshold, that is, the differences in the first difference information are between the maximum threshold and the minimum threshold.

[0106] Among them, if the first difference information exceeds the first difference threshold, for example, the maximum value in the first difference information is greater than the maximum threshold of the first difference threshold, and / or the minimum value in the first difference information is less than the minimum threshold of the first difference threshold, it can be determined that the thrust plate 10 is tilted.

[0107] If the first difference information does not exceed the first difference threshold, that is, all differences in the first difference information are between the minimum threshold and the maximum threshold of the first difference threshold, it is determined that the thrust plate 10 is not tilted.

[0108] In some embodiments,

[0109] The distance value monitored by the first distance monitoring device 1 can be recorded as the first distance value L1, and the distance value monitored by the second distance monitoring device 2 can be recorded as the second distance value L2. The first distance information L is composed of the first distance values ​​L1 monitored at multiple different times, and the second distance information L is composed of the second distance values ​​L2 monitored at multiple different times.

[0110] In this implementation, the difference (eg, L1-L2) between the first distance value L1 and the second distance value L2 monitored at the same time can be calculated and recorded as the first difference. The difference information composed of multiple first differences can be recorded as the first difference information.

[0111] The maximum threshold in the first difference threshold may be Max1, and the minimum threshold in the first difference threshold may be Min1. In this implementation, the maximum value in the first difference information and the maximum threshold Max1, and the minimum value in the first difference information and the minimum threshold Min1 may be compared.

[0112] In this embodiment, reference Figure 4 As shown, if the maximum value in the first difference information is less than or equal to the maximum threshold Max1 (reference Figure 4 The minimum value in the first difference information is greater than or equal to the minimum threshold value Min1 (reference Figure 4 If the dashed line in the lower middle part is shown, it means that all the differences in the first difference information do not exceed the first difference threshold, which means that the axial position deviation between the radial first end and the radial second end of the thrust plate 10 is not large, and it can be determined that the thrust plate 10 is not tilted.

[0113] In this embodiment, reference Figure 5 and Figure 6 As shown, if the maximum value in the first difference information is greater than the maximum threshold Max1 (reference Figure 5 and / or, if the minimum value in the first difference information is less than the minimum threshold value Min1 (reference Figure 5If the first difference information contains a difference exceeding the first difference threshold, it means that the axial position deviation between the radial first end and the radial second end of the thrust plate 10 is large, and it can be determined that the thrust plate 10 is tilted.

[0114] It should be noted that, in addition to the above-mentioned looseness and tilt fault analysis of the thrust plate 10, this embodiment can also perform other fault analysis on the thrust plate 10, which is not limited to this. For example, the thrust plate 10 can be analyzed for displacement.

[0115] The axial center distance calculation information of the thrust plate 10 can be determined based on the first distance information and the second distance information. The distance value in the first distance information is the distance between the radial first end and the first distance monitoring device 1, and the distance value in the second distance information is the distance between the radial second end and the second distance monitoring device 2. The radial first end and the radial second end are two ends of the thrust plate 10 that are radially opposite to each other, and the distance between the radial first end and the center of the thrust plate 10 is equal to the distance between the radial second end and the center of the thrust plate 10. Therefore, when calculating the axial center distance calculation value in the axial center distance calculation information, half of the sum of the corresponding first distance value L1 and the second distance value L2 can be determined as the corresponding axial center distance calculation value L, that is,

[0116] The axial center distance calculation information may be composed of a plurality of axial center distance calculation values. Theoretically, if the thrust plate 10 does not undergo axial displacement, the axial center distance calculation value and the axial center distance monitoring value should be similar. In view of this, it is possible to determine whether the thrust plate 10 undergoes axial displacement based on the axial center distance monitoring information and the axial center distance calculation information of the thrust plate 10.

[0117] The axial center distance monitoring information may include multiple axial center distance monitoring values, and the axial center distance calculation information may include multiple axial center distance calculation values. Based on the axial center distance monitoring value and the axial center distance calculation value corresponding to the same time, the difference between the two at the time is determined, and the difference can be recorded as the second difference. The second differences at multiple different times can constitute the second difference information.

[0118] That is, in this embodiment, the second difference information between the axial center distance calculation information and the axial center distance monitoring information can be determined based on the axial center distance monitoring information and the axial center distance calculation information of the thrust plate 10. The second difference information includes a plurality of second differences at different times.

[0119] Among them, reference Figure 7As shown, if the second difference information does not exceed the second difference threshold, it is determined that the thrust plate 10 has not undergone axial displacement. The second difference information does not exceed the second difference threshold means that the difference in the second difference information is within the maximum threshold of the second difference threshold (reference Figure 7 The dashed line in the upper middle) and the minimum threshold (reference Figure 7 dotted line in the lower center).

[0120] Among them, reference Figure 8 As shown, if the second difference information exceeds the second difference threshold, it is determined that the thrust plate 10 has axial displacement. The second difference information exceeds the second difference threshold means that at least one difference in the second difference information is within the maximum threshold of the second difference threshold (reference Figure 8 The dashed line in the upper middle) and the minimum threshold (reference Figure 8 outside the lower middle dashed line).

[0121] In some embodiments,

[0122] When determining the difference at the first moment in the second difference information, the distance value of the first distance information at the first moment and the distance value of the second distance information at the first moment can be used to calculate the axial center distance calculation value corresponding to the first moment, and then, the axial center distance calculation value at the above first moment is subtracted from the axial center distance monitoring value at the first moment in the axial center distance monitoring information to obtain the difference at the first moment in the second difference information.

[0123] When it is determined that the thrust plate 10 has undergone axial displacement, the direction of the axial displacement of the thrust plate 10 can be determined by comparing the axial center distance calculation information with the axial center distance monitoring information.

[0124] Among them, when comparing the size between the axial center distance calculation information and the axial center distance monitoring information, if the axial center distance calculation value at each moment is greater than the corresponding axial center distance monitoring value, it is considered that the axial center distance calculation information is greater than the axial center distance monitoring information, and it is determined that the thrust plate 10 is axially moved backward (reference Fig. 9 That is, the thrust plate 10 moves away from the front axial bearing 20.

[0125] Among them, when comparing the size between the axial center distance calculation information and the axial center distance monitoring information, if the axial center distance calculation value at each moment is smaller than the corresponding axial center distance monitoring value, it is considered that the axial center distance calculation information is smaller than the axial center distance monitoring information, and it is determined that the thrust plate 10 is axially moved forward (reference Fig.10 That is, the thrust plate 10 moves toward the direction close to the front axial bearing 20.

[0126] It should be noted that after the thrust plate 10 undergoes axial displacement, the waveform corresponding to the axial center distance calculation information and the waveform corresponding to the axial center distance monitoring information generally do not intersect. Therefore, the size of the axial center distance calculation information and the axial center monitoring information can be determined by simply comparing the size between the axial center distance calculation value and the axial center distance monitoring value at any time, and the axial displacement direction of the thrust plate 10 can be confirmed.

[0127] That is to say, if the calculated value of the axial center distance at any moment is smaller than the corresponding monitored value of the axial center distance, it can be said that the calculated value of the axial center distance at each moment is smaller than the corresponding monitored value of the axial center distance, and it can be considered that the calculated information of the axial center distance is smaller than the monitored information of the axial center distance, and it can be determined that the thrust plate 10 has moved forward axially.

[0128] Similarly, if the calculated value of the axial center distance at any moment is greater than the corresponding axial center distance monitoring value, it can be explained that the calculated value of the axial center distance at each moment is greater than the corresponding axial center distance monitoring value, and it can be considered that the axial center distance calculation information is greater than the axial center distance monitoring information, and it can be determined that the thrust plate 10 has moved axially backward.

[0129] In this embodiment, by performing fault analysis on the thrust plate 10 through the first distance monitoring information, the second distance monitoring information and the axial center distance monitoring information, etc., it is possible to monitor faults such as looseness, tilting and displacement of the thrust plate 10, and the direction of displacement can be determined. It is possible to effectively determine various fault states of the thrust plate 10 without disassembling the compressor, thereby avoiding the inability to operate the compressor due to abnormalities in the thrust plate 10, and saving the time cost of troubleshooting compressor abnormalities.

[0130] In an exemplary embodiment, a thrust plate fault monitoring device and a thrust plate fault monitoring method are provided. The thrust plate fault monitoring device and the thrust plate fault monitoring method can be applied to a magnetic suspension compressor or other equipment, without limitation.

[0131] refer to Figure 1 As shown, the thrust plate fault monitoring device may include a display device 4, and the display device 4 is electrically connected to the fault analysis device 3. The display device 4 may be configured to display information based on the information transmitted by the fault analysis device 3. For example, the display device 4 may include an oscilloscope, or may include other devices capable of displaying information, which is not limited thereto.

[0132] In some embodiments,

[0133] The fault analysis device 3 may be a controller of the magnetic levitation compressor, and the display device 4 may be an oscilloscope. After the controller obtains the first distance information and the second distance information, it may perform fault analysis based on the first distance information, the second distance information, and the axial center distance monitoring information. During the fault analysis process, the controller may obtain the first difference information and the second difference information.

[0134] In this implementation, the oscilloscope can obtain the second difference information and the second difference information through the controller, so as to display the waveform corresponding to the first difference information and the waveform corresponding to the second difference information. It should be noted that relevant personnel can select the waveform displayed by the oscilloscope by operating the waveform option in the oscilloscope.

[0135] In this implementation, if relevant personnel know the first difference threshold and the second difference threshold, they can use the oscilloscope and the waveform it displays to clearly and vividly understand whether the first difference information exceeds the first difference threshold and whether the second difference information exceeds the second difference threshold, thereby understanding the fault status of the thrust plate 10.

[0136] In some embodiments,

[0137] The fault analysis device 3 may be a controller of the magnetic levitation compressor, and the display device 4 may be an oscilloscope. After the controller obtains the first distance information and the second distance information, the oscilloscope can obtain the first distance information and the second distance information through the controller, so that the oscilloscope can display the waveform corresponding to the first distance information and the waveform corresponding to the second distance information. It should be noted that relevant personnel can select the waveform displayed by the oscilloscope by operating the waveform option in the oscilloscope.

[0138] It should be noted that, in addition to obtaining the above-mentioned first distance information, second distance information, first difference information, and second difference information through the fault analysis device 3, the display device 4 can also obtain information such as axial center distance calculation information and axial center distance monitoring information through the fault analysis device 3. Of course, in addition to displaying the above-mentioned information in the form of waveforms, the display device 4 can also display the above-mentioned information in other forms (such as table form), which is not limited to this.

[0139] In addition, in this embodiment, when information display is not required, the display device 4 can be electrically disconnected from the fault analysis device 3; when information display is required, the display device 4 can be electrically connected to the fault analysis device 3. In this way, the flexibility of the entire thrust plate fault monitoring device can be improved.

[0140] In this embodiment, by providing the display device 4 , it is easier for relevant personnel to understand the relevant data of the thrust plate 10 in an intuitive and direct manner, thereby making it easier to detect the fault status of the thrust plate 10 .

[0141] In one exemplary embodiment, a magnetic levitation compressor is provided. Figure 1 As shown, the magnetic suspension compressor may include the thrust plate 10 and the thrust plate fault monitoring device in the other embodiments described above.

[0142] In the magnetic levitation compressor, a first distance monitoring device 1 is used to monitor first distance information between a radial first end of the thrust plate 10 and the first distance monitoring device 1, and a second distance monitoring device 2 is used to monitor second distance information between a radial second end of the thrust plate 10 and the second distance monitoring device 2. Then, the thrust plate 10 is subjected to fault analysis based on the first distance monitoring information and the second distance monitoring information. This makes it easier to troubleshoot faults in the thrust plate 10, and enables effective judgment of the fault state of the thrust plate 10 without disassembling the compressor, thereby avoiding the inability of the compressor to operate due to abnormalities in the thrust plate 10, and saving time and cost for troubleshooting compressor abnormalities.

[0143] In some embodiments,

[0144] refer to Figure 1 and Fig.11 As shown, in this embodiment, displacement sensors are respectively installed at the radial ends of the front axial bearing 20 of the magnetic suspension compressor as the first distance monitoring device 1 and the second distance monitoring device 2 for monitoring the operation of the thrust plate 10.

[0145] In the thrust plate fault monitoring device, the controller of the magnetic suspension compressor can be used as the fault analysis device 3. The controller has two inputs, namely, the signal ① (i.e., the first distance information) of the radial first end of the thrust plate 10 and the signal ② (i.e., the second distance information) of the radial second end.

[0146] Among them, the controller can achieve certain signal processing:

[0147] For the thrust plate 10, the controller may record corresponding threshold information, indicating the acceptable range of displacement of the thrust plate 10, for subsequent signal comparison;

[0148] For the signal ① at the radial first end and the signal ② at the radial second end, the controller may compare the first difference information of the distance information between the two with the corresponding threshold information, and may output the waveform of the first difference information to the oscilloscope for display;

[0149] The axial center distance calculation information is obtained through the first distance information and the second distance information, and the controller compares it with the axial center distance monitoring information. At the same time, the waveform of the second difference information between the axial center distance calculation information and the axial center distance monitoring information of the thrust plate 10 can be output to the oscilloscope for display.

[0150] refer to Fig.11 As shown, L1 represents the distance value monitored by the first distance monitoring device 1 , and L2 represents the distance value monitored by the second distance monitoring device 2 .

[0151] Wherein, L represents the axial center distance monitoring value,

[0152] R represents the distance between the first distance monitoring device 1 and the second distance monitoring device 2, α represents the inclination of the thrust plate 10,

[0153] Figure 3 and Figure 6 The waveform of the thrust plate 10 when it is running in the normal position, wherein the dotted line in the waveform diagram is the acceptable fluctuation threshold of the thrust plate 10 corresponding to the corresponding waveform.

[0154] When performing fault analysis, the fault analysis can be performed when the standard output current of each signal is calibrated and the magnetic levitation compressor is in a static suspension or low-frequency operation state.

[0155] If the first difference information does not exceed the first difference threshold and the second difference information does not exceed the second difference threshold, it means that the axial displacement and the tilt degree of the thrust plate 10 are normal, that is, it is considered that the thrust plate 10 has no fault.

[0156] If the first difference information exceeds the first difference threshold, it means that the inclination of the thrust plate 10 exceeds the normal range, that is, it is considered that the thrust plate 10 is tilted. It should be noted that when the thrust plate 10 is tilted, the waveforms corresponding to the first distance information and the second distance information may be two sine waves with opposite phases and the same amplitude.

[0157] If the first difference information does not exceed the first difference threshold, and the second difference information exceeds the second difference threshold, it means that the thrust plate 10 has axial displacement, but the inclination is normal. In this case, when the axial center distance calculation information is less than the axial center distance monitoring information, it means that the thrust plate 10 has axial forward displacement; when the axial center distance calculation information is greater than the axial center distance monitoring information, it means that the thrust plate 10 has axial backward displacement.

[0158] If the axial center distance monitoring information, the first distance information, and the second distance information are respectively regular waveform information, it means that the thrust plate 10 is loose, and the center position of the thrust plate 10 may move downward due to gravity. In this case, the first distance information and the second distance information may have aperiodic displacement, a phase difference may appear between the waveforms of the first distance information and the second distance information, and the axial center distance monitoring information may have aperiodic fluctuation due to the instability of the bearing control.

[0159] In this implementation, the controller may also be configured with a first distance threshold corresponding to the first distance information and a second distance threshold corresponding to the second distance information. Both the first distance threshold and the second distance threshold may include a maximum threshold and a minimum threshold.

[0160] Among them, when it is determined that the thrust plate 10 has undergone axial displacement, if all distance values ​​in the first distance information are greater than the maximum threshold value in the first distance threshold value, and all distance values ​​in the second distance information are greater than the maximum threshold value in the second distance threshold value, it is considered that the thrust plate 10 has undergone axial rearward displacement; if all distance values ​​in the first distance information are less than the minimum threshold value in the first distance threshold value, and all distance values ​​in the second distance information are less than the minimum threshold value in the second distance threshold value, it is considered that the thrust plate 10 has undergone axial forward displacement.

[0161] It should be noted that, in addition to the above-mentioned methods, fault analysis may also be performed in other ways, which are not limited thereto.

[0162] In an exemplary embodiment, an air conditioning device is provided, which may include the magnetic levitation compressor described above.

[0163] refer to Figure 1 As shown, in the air-conditioning equipment, a first distance monitoring device 1 is used to monitor the first distance information between the radial first end of the thrust plate 10 and the first distance monitoring device 1, and a second distance monitoring device 2 is used to monitor the second distance information between the radial second end of the thrust plate 10 and the second distance monitoring device 2. Then, the thrust plate 10 is subjected to fault analysis through the above-mentioned first distance monitoring information and second distance monitoring information. This makes it easier to troubleshoot the fault of the thrust plate 10, and can effectively determine the fault state of the thrust plate 10 without disassembling the compressor, thereby avoiding the compressor being unable to operate due to the abnormality of the thrust plate 10 and affecting the use of the air-conditioning equipment, thereby saving the time cost of troubleshooting the compressor abnormality.

[0164] The professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0165] It should be noted that the phrases "one implementation", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0166] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more limiting values, the elements defined by the sentence "comprise a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0167] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. A thrust plate fault monitoring device, characterized in that: The thrust plate fault monitoring device comprises a first distance monitoring device, a second distance monitoring device and a fault analysis device, wherein the first distance monitoring device is electrically connected to the fault analysis device, and the second distance monitoring device is electrically connected to the fault analysis device; The first distance monitoring device is configured to monitor first distance information between a radial first end of the thrust plate and the first distance monitoring device, and transmit the monitored first distance information to the fault analysis device; The second distance monitoring device is configured to monitor second distance information between the radial second end of the thrust plate and the second distance monitoring device, and transmit the monitored second distance information to the fault analysis device; The fault analysis device is configured to receive the first distance information and the second distance information, and perform a fault analysis on the thrust plate based on the first distance information and the second distance information; The radial first end and the radial second end are two ends of the thrust plate that are radially opposite to each other.

2. The thrust plate fault monitoring device according to claim 1, characterized in that: When the thrust plate fault monitoring device is applied to a magnetic levitation compressor, in the axial direction of the thrust plate, the first distance monitoring device and the second distance monitoring device are fixedly installed on the first side of the thrust plate, and the first side is the side where the front axial bearing of the magnetic levitation compressor is located relative to the thrust plate.

3. The thrust plate fault monitoring device according to claim 2, characterized in that: The first distance monitoring device and the second distance monitoring device are respectively fixed on a fixing device of the magnetic levitation compressor, and the fixing device includes a device fixed relative to the front axial bearing.

4. The thrust plate fault monitoring device according to claim 3, characterized in that: The fixing device comprises the front axial bearing and / or the housing of the magnetically suspended compressor.

5. The thrust plate fault monitoring device according to claim 3, characterized in that: The first distance monitoring device and the second distance monitoring device are respectively connected to the fixing device by welding and / or bonding.

6. The thrust plate fault monitoring device according to claim 1, characterized in that: The thrust plate fault monitoring device includes a display device, which is electrically connected to the fault analysis device, and the display device is configured to display information based on information transmitted by the fault analysis device.

7. The thrust plate fault monitoring device according to claim 6, characterized in that: The display device includes an oscilloscope.

8. The thrust plate fault monitoring device according to any one of claims 1 to 7, characterized in that: The first distance monitoring device and / or the second distance monitoring device comprises a displacement sensor.

9. A magnetic levitation compressor, characterized in that: The magnetic suspension compressor comprises a thrust plate and a thrust plate fault monitoring device as claimed in any one of claims 1 to 8.

10. An air conditioning device, characterized in that: The air conditioning device comprises the magnetic levitation compressor as claimed in claim 9.

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