Axial displacement real-time monitoring system and motor control system
By measuring the grating system and data acquisition and analysis mechanism, the axial displacement of the motor shaft is monitored in real time and alarm or control is triggered, which solves the problem of difficulty in monitoring the displacement of the motor shaft in the prior art and ensures the safe operation of the motor.
Patent Information
- Application Number
- CN202420848051.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The prior art is difficult to monitor the axial displacement of the motor shaft in real time, resulting in equipment damage and accidents that may occur when the displacement exceeds the limit.
The measuring grating system, including emitters and receivers, uses a ring to block the detected light of the emitter to monitor the axial displacement. The data acquisition and analysis mechanism calculates the axial displacement based on the light occlusion situation, and triggers an alarm or control when the displacement exceeds the limit. The motor starts and stops.
Real-time monitoring of the axial displacement of the motor shaft is realized to ensure the safe operation of the motor and avoid equipment damage and accidents caused by the displacement exceeding the limit.
Smart Images
Figure CN222283019U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of displacement monitoring technology, and in particular, to a real-time monitoring system for axial displacement. Background Art
[0002] A motor is a device that converts electrical energy into mechanical energy. During operation, its shaft may move axially. If the axial displacement is greater than the limit displacement, the motor may be damaged.
[0003] Therefore, in order to ensure the safety of the motor during operation, a system for real-time monitoring of the axial displacement of the motor shaft is urgently needed. Summary of the invention
[0004] The embodiments of the present application provide a real-time monitoring system for axial displacement, which can monitor the axial displacement of a motor shaft in real time to ensure the safe operation of the motor.
[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.
[0006] According to a first aspect of an embodiment of the present application, a real-time monitoring system for axial displacement is provided, comprising:
[0007] A measuring grating, comprising an emitter and a light receiver, wherein the emitter and the light receiver are arranged on both sides of the motor shaft along the axial direction, and the detection light of the emitter is located outside the motor shaft and parallel to the radial direction of the motor shaft;
[0008] A circular ring is coaxially arranged outside the motor shaft. In the radial direction of the motor shaft, when the circular ring is located between the emitter and the light receiver, the detection light of the emitter is blocked. When the motor shaft is axially displaced, the blocking condition of the detection light of the emitter changes.
[0009] The data collection and analysis mechanism obtains the axial displacement monitoring result of the motor shaft according to the shielding condition of the detection light of the transmitter.
[0010] In some embodiments of the present application, based on the above-mentioned solution, in the axial direction of the motor shaft, if the motor shaft has no axial displacement, the circular ring is partially or completely located between the two ends of the transmitter.
[0011] In some embodiments of the present application, based on the above scheme, the data collection and analysis mechanism includes:
[0012] A data collection element collects data from the transmitter and the light receiver to obtain a collection result;
[0013] The data analysis component obtains the current obstruction condition of the detection light of the transmitter according to the collection results, compares the current obstruction condition with the initial obstruction condition, and obtains the axial displacement monitoring result of the motor shaft. The initial obstruction condition is the obstruction condition of the detection light of the transmitter when there is no axial displacement of the motor shaft.
[0014] In some embodiments of the present application, based on the aforementioned solution, the data acquisition element is electrically connected to the emitter and the light receiver, and the data analysis element is electrically connected to the data acquisition element.
[0015] In some embodiments of the present application, based on the aforementioned solution, the data acquisition element is a logic collector, and the data analysis element is a data analyzer.
[0016] In some embodiments of the present application, based on the above solution, it also includes:
[0017] The alarm mechanism compares the axial displacement monitoring result with the limit displacement to determine whether to issue an alarm.
[0018] In some embodiments of the present application, based on the above solution, the measuring grating further includes:
[0019] The first mounting plate is used to mount the transmitter, and its length direction is the axial direction of the motor;
[0020] The second mounting plate is used for mounting the light receiver, and its length direction is the axial direction of the motor, and is symmetrically arranged with respect to the motor shaft with respect to the first mounting plate.
[0021] In some embodiments of the present application, based on the aforementioned solution, the circular ring is a distance ring.
[0022] According to a second aspect of the present application, a motor control system is provided, comprising the above-mentioned real-time monitoring system for axial displacement.
[0023] In some embodiments of the present application, based on the above solution, it also includes:
[0024] The motor start-stop mechanism starts and stops the motor according to the axial displacement monitoring results.
[0025] The beneficial effects of this application are as follows:
[0026] When the motor shaft has axial displacement, the shielding condition of the detection light of the transmitter by the circular ring changes. The data acquisition and analysis mechanism obtains the axial displacement monitoring result according to the shielding condition of the detection light of the transmitter, thereby realizing real-time monitoring of the axial displacement of the motor shaft and ensuring the safe operation of the motor.
[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0029] Figure 1 A schematic diagram of the front view structure of a real-time monitoring system for axial displacement in an embodiment of the present application is shown;
[0030] Figure 2 A side view structural schematic diagram of a real-time axial displacement monitoring system in an embodiment of the present application is shown. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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 creative work are within the scope of protection of this application.
[0032] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0033] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0034] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0035] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0036] In order to better understand the embodiments of the present application, taking the AC synchronous motor as an example, at present, the AC synchronous motor adopts front and rear bearing control. When the excitation current and the speed change, the shaft of the motor rotor may have axial displacement. When the axial displacement exceeds the limit displacement, friction between the shaft shoulder and the bearing may occur, resulting in a serious accident of bearing burning, causing major accidents such as equipment shutdown and equipment maintenance.
[0037] Figure 1 FIG. 2 shows a front view structural diagram of a real-time axial displacement monitoring system in an embodiment of the present application. Figure 2 A side view structural diagram of a real-time axial displacement monitoring system in an embodiment of the present application is shown. Figure 1 and Figure 2 In the figure, 1 is the transmitter, 2 is the light receiver, 3 is the data acquisition component, 4 is the data analysis component, 5 is the motor shaft, and 6 is the ring. Figure 1 and Figure 2 , provides a real-time monitoring system for axial displacement, which at least includes a measuring grating, a ring and a data acquisition and analysis mechanism, which is described in detail as follows:
[0038] The measuring grating comprises an emitter and a light receiver, wherein the emitter and the light receiver are arranged on both sides of the motor shaft along the axial direction, and the detection light of the emitter is located outside the motor shaft and parallel to the radial direction of the motor shaft.
[0039] Specifically, the detection light of the emitter is located outside the motor shaft, and the motor shaft does not block the detection light of the emitter.
[0040] The circular ring is coaxially arranged on the outside of the motor shaft. In the radial direction of the motor shaft, when the circular ring is located between the emitter and the light receiver, the detection light of the emitter is blocked. When the motor shaft undergoes axial displacement, the shielding of the detection light of the emitter changes.
[0041] Specifically, when the motor shaft undergoes axial displacement, the annular ring partially or completely blocks the detection light of the emitter, that is, the shielding condition of the detection light of the emitter changes, so that the detection light received by the light receiver changes.
[0042] The data collection and analysis mechanism obtains the axial displacement monitoring result of the motor shaft according to the shielding condition of the detection light of the transmitter.
[0043] Specifically, if the shielding condition of the detection light of the transmitter changes, the motor shaft will have an axial displacement, and if the shielding condition of the detection light of the transmitter does not change, the motor shaft will not have an axial displacement.
[0044] Optionally, in the axial direction of the motor shaft, if the motor shaft has no axial displacement, the circular ring is partially or completely located between the two ends of the transmitter.
[0045] Specifically, if the circular ring is partially located between the two ends of the transmitter, when the motor shaft undergoes axial displacement, the obstruction of the detection light of the transmitter by the circular ring will increase or decrease; if the circular ring is entirely located between the two ends of the transmitter, when the motor shaft undergoes axial displacement, when the end of the circular ring is flush with the end of the transmitter, the circular ring will reduce the obstruction of the detection light of the transmitter or obstruct the detection light at different positions; when the end of the circular ring is not flush with the end of the transmitter, the circular ring will block the detection light at different positions.
[0046] For example, in the axial direction of the motor shaft, the length of the ring is 5 mm, and the length of the emitter is 10 mm, that is, the length of the detection light is 10 mm, see Figure 2 If the ring 2.5mm is located on the left side of the emitter, and 2.5mm is located between the left and right sides of the emitter, that is, the ring part is located between the two ends of the emitter, when the motor shaft is axially displaced to the right, the ring will increase the blockage of the detection light of the emitter, and when the motor shaft is axially displaced to the left, the ring will reduce the blockage of the detection light of the emitter. If the ring 5mm is located between the left and right sides of the emitter, that is, the entire ring is located between the two ends of the emitter, when the left side of the ring is flush with the left side of the emitter, if the motor shaft is axially displaced to the right, the position of the ring blocking the detection light changes, if the motor shaft is axially displaced to the left, the ring will reduce the blockage of the detection light of the emitter, when the right side of the ring is flush with the right side of the emitter, if the motor shaft is axially displaced to the left, the position of the ring blocking the detection light changes, and if the motor shaft is axially displaced to the right, the ring will reduce the blockage of the detection light of the emitter.
[0047] Optionally, in the axial direction of the motor shaft, the length of the transmitter is greater than the length of the ring.
[0048] Optionally, the data collection and analysis mechanism includes:
[0049] A data collection element collects data from the transmitter and the light receiver to obtain a collection result;
[0050] The data analysis component obtains the current obstruction condition of the detection light of the transmitter according to the collection results, compares the current obstruction condition with the initial obstruction condition, and obtains the axial displacement monitoring result of the motor shaft. The initial obstruction condition is the obstruction condition of the detection light of the transmitter when there is no axial displacement of the motor shaft.
[0051] Specifically, the collection result may be whether the corresponding position of the transmitter emits detection light and whether the corresponding position of the receiver receives the detection light. Based on the collection result, it may be determined whether the detection light emitted by the corresponding position is blocked, thereby obtaining the current blocking condition of the detection light of the transmitter. The current blocking condition is compared with the initial blocking condition. If the two are the same, the axial displacement monitoring result of the motor shaft is that the motor shaft has no axial displacement. If the two are different, the axial displacement monitoring result of the motor shaft is that the motor shaft has axial displacement, and the displacement amount is obtained based on the difference between the two.
[0052] Optionally, the axial displacement of the motor shaft is obtained according to the current shielding condition and the initial shielding condition.
[0053] For example, in the axial direction of the motor shaft, the length of the ring is 5 mm, and the length of the transmitter is 10 mm, see Figure 2 , if the ring 2.5mm is located on the left side of the transmitter, and 2.5mm is located between the left and right sides of the transmitter, that is, the ring part is located between the two ends of the transmitter, when the motor shaft moves to the right, if the axial displacement is less than or equal to the initial distance between the right side of the ring and the right side of the transmitter, that is, less than or equal to 7.5mm, the axial displacement is the distance between the current position and the initial position corresponding to the detection light blocked by the right side of the ring. If the axial displacement is greater than the initial distance between the right side of the ring and the right side of the transmitter, that is, greater than 7.5mm, and is less than or equal to the sum of the initial distance between the left side of the ring and the left side of the transmitter and the total length of the transmitter, that is, less than or equal to 12.5mm, then calculate the detection light blocked by the left side of the ring. The first distance between the front position and the left side of the emitter and the initial distance between the left side of the ring and the left side of the emitter is 2.5mm, and the axial displacement is the sum of the first distance and 2.5mm. If the axial displacement is greater than the sum of the initial distance between the left side of the ring and the left side of the emitter and the total length of the emitter, that is, greater than 12.5mm, the left side of the ring and the right side of the emitter are separated, and the axial displacement cannot be measured. When the motor shaft moves to the left, if the axial displacement is less than or equal to the initial distance between the left side of the ring and the left side of the emitter, the axial displacement is the distance between the current position and the initial position corresponding to the detection light blocked by the right side of the ring. If the axial displacement is greater than the initial distance between the left side of the ring and the left side of the emitter, the axial displacement cannot be measured.
[0054] Optionally, the data acquisition element is electrically connected to the emitter and the light receiver, and the data analysis element is electrically connected to the data acquisition element.
[0055] Optionally, the data acquisition element is a logic collector, and the data analysis element is a data analyzer.
[0056] Optionally, it also includes:
[0057] The alarm mechanism compares the axial displacement monitoring result with the limit displacement to determine whether to issue an alarm.
[0058] Specifically, comparing the axial displacement monitoring result with the limit displacement can be understood as comparing the axial displacement amount with the limit displacement. When the axial displacement amount is greater than the limit displacement, an alarm is issued, and when the axial displacement amount is less than or equal to the limit displacement, no alarm is issued.
[0059] Optionally, the measuring grating further includes:
[0060] The first mounting plate is used to mount the transmitter, and its length direction is the axial direction of the motor;
[0061] The second mounting plate is used for mounting the light receiver, and its length direction is the axial direction of the motor, and is symmetrically arranged with respect to the motor shaft with respect to the first mounting plate.
[0062] Optionally, the circular ring is a distance ring, and the distance ring can be arranged at the connection position between the motor shaft and the coupling.
[0063] According to a second aspect of the present application, a motor control system is provided, comprising the above-mentioned real-time monitoring system for axial displacement.
[0064] Optionally, it also includes:
[0065] The motor start-stop mechanism starts and stops the motor according to the axial displacement monitoring results.
[0066] Specifically, when the axial displacement is greater than the limit displacement, the motor is turned off, and when the axial displacement is less than or equal to the limit displacement, the motor is not turned off.
[0067] In the present application, when the motor shaft undergoes axial displacement, the shielding condition of the detection light of the transmitter by the circular ring changes. The data acquisition and analysis mechanism obtains the axial displacement monitoring result according to the shielding condition of the detection light of the transmitter, thereby realizing real-time monitoring of the axial displacement of the motor shaft and ensuring the safe operation of the motor.
[0068] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0069] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly or all or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.
[0071] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A real-time monitoring system for axial displacement, characterized in that: include: A measuring grating, comprising an emitter and a light receiver, wherein the emitter and the light receiver are arranged on both sides of the motor shaft along the axial direction, and the detection light of the emitter is located outside the motor shaft and parallel to the radial direction of the motor shaft; A circular ring is coaxially arranged outside the motor shaft. In the radial direction of the motor shaft, when the circular ring is located between the emitter and the light receiver, the detection light of the emitter is blocked. When the motor shaft is axially displaced, the blocking condition of the detection light of the emitter changes. The data collection and analysis mechanism obtains the axial displacement monitoring result of the motor shaft according to the shielding condition of the detection light of the transmitter.
2. The real-time axial displacement monitoring system according to claim 1, characterized in that: In the axial direction of the motor shaft, if the motor shaft has no axial displacement, the circular ring is partially or completely located between the two ends of the transmitter.
3. The real-time axial displacement monitoring system according to claim 1 is characterized in that: The data collection and analysis mechanism comprises: A data collection element collects data from the transmitter and the light receiver to obtain a collection result; The data analysis component obtains the current obstruction condition of the detection light of the transmitter according to the collection results, compares the current obstruction condition with the initial obstruction condition, and obtains the axial displacement monitoring result of the motor shaft. The initial obstruction condition is the obstruction condition of the detection light of the transmitter when there is no axial displacement of the motor shaft.
4. The real-time axial displacement monitoring system according to claim 3 is characterized in that: The data acquisition element is electrically connected to the emitter and the light receiver, and the data analysis element is electrically connected to the data acquisition element.
5. The real-time axial displacement monitoring system according to claim 3 is characterized in that: The data acquisition element is a logic collector, and the data analysis element is a data analyzer.
6. The real-time monitoring system for axial displacement according to claim 1, characterized in that: Also includes: The alarm mechanism compares the axial displacement monitoring result with the limit displacement to determine whether to issue an alarm.
7. The real-time axial displacement monitoring system according to claim 1, characterized in that: The measuring grating further comprises: The first mounting plate is used to mount the transmitter, and its length direction is the axial direction of the motor; The second mounting plate is used for mounting the light receiver, and its length direction is the axial direction of the motor, and is symmetrically arranged with respect to the motor shaft with respect to the first mounting plate.
8. The real-time monitoring system for axial displacement according to claim 1, characterized in that: The circular ring is a distance ring.
9. A motor control system, characterized in that: A real-time monitoring system for axial displacement comprising the system described in any one of claims 1 to 8.
10. A motor control system according to claim 9, characterized in that: Also includes: The motor start-stop mechanism starts and stops the motor according to the axial displacement monitoring results.