A magneto-electric type water turbine rotating speed measuring system and measuring method

Abstract

The application provides a magneto-electric water turbine rotating speed measuring system and a measuring method, and the system comprises an alternating magnetic field generating module, an electromotive force generating module and a frequency measuring module; the alternating magnetic field generating module is arranged on a water turbine main shaft and is used for generating an alternating magnetic field when rotating with the water turbine main shaft; the electromotive force generating module is arranged in the alternating magnetic field generated by the alternating magnetic field generating module and is used for generating an electromotive force according to the alternating magnetic field; and the frequency measuring module is connected with the electromotive force generating module and is used for determining the rotating speed of the water turbine according to the electromotive force. The technical scheme provided by the application can measure the frequency of the unit at a low rotating speed, thereby improving the reliability of the water turbine rotating speed measurement, and the working principle is simple and the equipment structure is compact.

Description

Technical Field

[0001] This application relates to the field of turbine speed measurement, and in particular to a magnetoelectric turbine speed measurement system and method. Background Technology

[0002] Currently, the "toothed disc frequency measurement" and "PT frequency measurement" methods, which are widely used in hydro-generator units, each have their own advantages and disadvantages. "Geared disc frequency measurement" requires installing a metal toothed disc at the turbine shaft. Besides being heavy, it also demands strict precision in the machining of the toothed disc itself. Furthermore, the distance between the toothed disc and the probe is small (1-2mm) during installation, making construction more demanding. "PT frequency measurement," on the other hand, suffers from low "residual magnetism" after the hydro-generator is shut down. Therefore, it cannot measure the frequency of the unit at low speeds during startup, resulting in lower accuracy of the turbine speed measurement results. Summary of the Invention

[0003] This application provides a magnetoelectric turbine speed measurement system and method to at least solve the technical problem that the frequency of the unit at low speed cannot be measured, resulting in low accuracy of turbine speed measurement results.

[0004] The first aspect of this application provides a magnetoelectric turbine speed measurement system, the system comprising: an alternating magnetic field generation module, an electromotive force generation module, and a frequency measurement module;

[0005] The alternating magnetic field generating module is installed on the turbine shaft and is used to generate an alternating magnetic field when rotating together with the turbine shaft.

[0006] The electromotive force generation module is set within the alternating magnetic field generated by the alternating magnetic field generation module, and is used to generate an electromotive force based on the alternating magnetic field.

[0007] The frequency measurement module is connected to the electromotive force generation module and is used to determine the rotational speed of the turbine based on the electromotive force.

[0008] Preferably, the system further includes: a display module;

[0009] The frequency measurement module is also used to send the determined turbine rotation speed to the display module;

[0010] The display module is used to display the rotational speed of the water turbine.

[0011] Preferably, the alternating magnetic field generating module includes: a permanent magnet;

[0012] The permanent magnet is attached to the turbine shaft.

[0013] Furthermore, the electromotive force generation module includes: a coil and a wire;

[0014] The coil is connected by the wire to form a current loop.

[0015] Furthermore, the electromotive force generation module also includes: an energy dissipation resistor;

[0016] The energy-dissipating resistor is connected to the coil via a wire, and the energy-dissipating resistor is used to dissipate electrical energy.

[0017] Furthermore, the electromotive force generation module also includes a diode, which is connected in series in the current loop.

[0018] Preferably, the frequency measurement module includes: a current pulse counter and a frequency measurement device;

[0019] The pulse counter and the frequency measuring device are connected;

[0020] The current pulse counter is connected in series in the current loop. The current pulse counter is used to measure the number of current pulses in the current loop within a preset period and send the number of current pulses to the frequency measuring device.

[0021] The frequency measuring device is used to determine the turbine speed based on the number of current pulses.

[0022] A second aspect of this application provides a method for measuring the rotational speed of a magnetoelectric turbine, the method comprising:

[0023] An alternating magnetic field generation module is installed on the main shaft of the turbine to be tested, and generates an alternating magnetic field corresponding to the turbine when the turbine is rotating.

[0024] The electromotive force of the turbine under test is determined based on the alternating magnetic field corresponding to the turbine under test.

[0025] The rotational speed of the turbine to be tested is determined based on the electromotive force corresponding to the turbine to be tested.

[0026] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the method described in the second aspect.

[0027] The fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described in the second aspect.

[0028] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0029] This application proposes a magnetoelectric turbine speed measurement system and method. The system includes an alternating magnetic field generation module, an electromotive force (EMF) generation module, and a frequency measurement module. The alternating magnetic field generation module is mounted on the turbine shaft and generates an alternating magnetic field as it rotates with the turbine shaft. The EMF generation module is positioned within the alternating magnetic field generated by the alternating magnetic field generation module and generates an EMF based on the alternating magnetic field. The frequency measurement module is connected to the EMF generation module and determines the turbine speed based on the EMF. The technical solution proposed in this application can measure the frequency of the unit at low speeds, thereby improving the reliability of turbine speed measurement. Furthermore, the working principle is simple and the equipment structure is compact.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 This is a first structural diagram of a magnetoelectric turbine speed measurement system according to an embodiment of this application;

[0033] Figure 2 This is a second structural diagram of a magnetoelectric turbine speed measurement system according to an embodiment of this application;

[0034] Figure 3 This is a detailed structural diagram of a magnetoelectric turbine speed measurement system according to an embodiment of this application;

[0035] Figure 4 This is a flowchart illustrating a method for measuring the rotational speed of a magnetoelectric turbine according to an embodiment of this application; Attached image description:

[0037] Alternating magnetic field generation module 1, electromotive force generation module 2, frequency measurement module 3, display module 4, permanent magnet 1-1, coil 2-1, wire 2-2, energy dissipation resistor 2-3, diode 2-4, current pulse counter 3-1, frequency measurement device 3-2. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0039] This application proposes a magnetoelectric turbine speed measurement system and method. The system includes: an alternating magnetic field generation module, an electromotive force (EMF) generation module, and a frequency measurement module. The alternating magnetic field generation module is mounted on the turbine shaft and generates an alternating magnetic field as it rotates with the turbine shaft. The EMF generation module is positioned within the alternating magnetic field generated by the alternating magnetic field generation module and generates an EMF based on the alternating magnetic field. The frequency measurement module is connected to the EMF generation module and determines the turbine speed based on the EMF. The technical solution proposed in this application can measure the frequency of the unit at low speeds, thereby improving the reliability of turbine speed measurement. Furthermore, the working principle is simple and the equipment structure is compact.

[0040] The following description, with reference to the accompanying drawings, illustrates an embodiment of a magnetoelectric turbine speed measurement system and method.

[0041] Example 1

[0042] Figure 1 This is a structural diagram of a magnetoelectric turbine speed measurement system according to an embodiment of this application, as shown below. Figure 1 As shown, the system includes: an alternating magnetic field generation module 1, an electromotive force generation module 2, and a frequency measurement module 3;

[0043] The alternating magnetic field generating module 1 is installed on the turbine shaft and is used to generate an alternating magnetic field when rotating together with the turbine shaft.

[0044] The electromotive force generation module 2 is set within the alternating magnetic field generated by the alternating magnetic field generation module 1, and is used to generate an electromotive force based on the alternating magnetic field.

[0045] The frequency measurement module 3 is connected to the electromotive force generation module 2 and is used to determine the rotational speed of the turbine based on the electromotive force.

[0046] In the embodiments disclosed herein, such as Figure 2 As shown, the system also includes: a display module 4;

[0047] The frequency measurement module 3 is also used to send the determined turbine rotation speed to the display module 4;

[0048] The display module 4 is used to display the rotational speed of the water turbine.

[0049] In the embodiments disclosed herein, such as Figure 3 As shown, the alternating magnetic field generating module 1 includes: a permanent magnet 1-1;

[0050] The permanent magnet 1-1 is adsorbed onto the turbine shaft, wherein the turbine shaft is connected to the water guide bearing cover plate.

[0051] Furthermore, such as Figure 3 As shown, the electromotive force generation module 2 includes: a coil 2-1 and a wire 2-2;

[0052] The coil 2-1 is connected by the wire 2-2 to form a current loop.

[0053] It should be noted that, as Figure 3 As shown, the electromotive force generation module 2 further includes: energy dissipation resistors 2-3;

[0054] The energy-dissipating resistor 2-3 is connected to the coil 2-1 via a wire 2-2, and the energy-dissipating resistor 2-3 is used to dissipate electrical energy.

[0055] The resistance of the energy-dissipating resistors 2-3 can be 500Ω, consuming electrical energy in each cycle.

[0056] Furthermore, such as Figure 3 As shown, the electromotive force generation module 2 further includes a diode 2-4, which is connected in series in the current loop.

[0057] In the embodiments disclosed herein, such as Figure 3 As shown, the frequency measurement module 3 includes: a current pulse counter 3-1 and a frequency measurement device 3-2;

[0058] The pulse counter 3-1 and the frequency measuring device 3-2 are connected;

[0059] The current pulse counter 3-1 is connected in series in the current loop. The current pulse counter 3-1 is used to measure the number of current pulses in the current loop within a preset period and send the number of current pulses to the frequency measuring device 3-2.

[0060] The frequency measuring device 3-2 is used to determine the turbine speed based on the number of current pulses.

[0061] It should be noted that a diode 2-4 is connected in series in the current loop to make the current conduction unidirectional and avoid interference from the forward and reverse currents to the current pulse counter 3-1.

[0062] For example, when it is necessary to measure the rotational speed of a water turbine, the alternating magnetic field generating module 1 is installed on the main shaft of the water turbine. When the main shaft of the water turbine rotates, the alternating magnetic field generating module 1 rotates together with the main shaft of the water turbine to generate an alternating magnetic field.

[0063] Secondly, the alternating magnetic field generated by the alternating magnetic field generation module 1 is converted into an electromotive force using the electromotive force generation module 2.

[0064] Then, the current pulse counter 3-1 in the frequency measurement module 3 is used to measure the number of current pulses that pass within 1 second. The number of pulses is then sent to the frequency measurement device 3-2, which determines the turbine speed based on the number of current pulses that pass within 1 second.

[0065] Finally, the frequency measurement module 3 sends the determined turbine rotation speed to the display module 4 for display.

[0066] In summary, the magnetoelectric turbine speed measurement system proposed in this embodiment can measure the frequency of the unit at low speeds, thereby improving the reliability of turbine speed measurement. At the same time, the working principle is simple and the equipment structure is compact.

[0067] Example 2

[0068] Figure 4 This is a flowchart of a method for measuring the rotational speed of a magnetoelectric turbine according to an embodiment of this application, as shown below. Figure 4 As shown, the method includes:

[0069] Step 1: Set the alternating magnetic field generation module on the main shaft of the turbine to be tested, and generate the alternating magnetic field corresponding to the turbine when the turbine is rotating;

[0070] Step 2: Determine the electromotive force of the turbine under test based on the alternating magnetic field corresponding to the turbine under test;

[0071] Step 3: Determine the rotational speed of the turbine to be tested based on the electromotive force corresponding to the turbine to be tested.

[0072] For example, when it is necessary to measure the rotational speed of a water turbine, an alternating magnetic field generating module is installed on the main shaft of the water turbine. When the main shaft of the water turbine rotates, the alternating magnetic field generating module rotates together with the main shaft of the water turbine to generate an alternating magnetic field.

[0073] Secondly, the alternating magnetic field generated by the alternating magnetic field generation module is converted into an electromotive force using the electromotive force generation module.

[0074] Then, the current pulse counter in the frequency measurement module is used to count the number of current pulses that pass within 1 second. The number of pulses is then sent to the frequency measurement device, which determines the turbine speed based on the number of current pulses that pass within 1 second.

[0075] Finally, the frequency measurement module sends the determined turbine rotation speed to the display module for display.

[0076] In summary, the magnetoelectric turbine speed measurement system proposed in this embodiment can measure the frequency of the unit at low speeds, thereby improving the reliability of turbine speed measurement. At the same time, the working principle is simple and the equipment structure is compact.

[0077] Example 3

[0078] To implement the above embodiments, this disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the method described in Embodiment 2.

[0079] Example 4

[0080] To implement the above embodiments, this disclosure also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in Embodiment 2.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0083] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A magnetoelectric turbine speed measurement system, characterized in that, include: Alternating magnetic field generation module, electromotive force generation module, and frequency measurement module; The alternating magnetic field generating module is installed on the turbine shaft and is used to generate an alternating magnetic field when rotating together with the turbine shaft. The electromotive force generation module is set within the alternating magnetic field generated by the alternating magnetic field generation module, and is used to generate an electromotive force based on the alternating magnetic field. The frequency measurement module is connected to the electromotive force generation module and is used to determine the rotational speed of the turbine based on the electromotive force. The alternating magnetic field generating module includes: a permanent magnet; The permanent magnet is adsorbed onto the turbine shaft; The electromotive force generation module includes: a coil and a wire; The coil is connected by the wire to form a current loop; The electromotive force generation module further includes: an energy-dissipating resistor; The energy-dissipating resistor is connected to the coil via a wire, and the energy-dissipating resistor is used to dissipate electrical energy. The electromotive force generation module further includes a diode, which is connected in series in the current loop; The frequency measurement module includes: a current pulse counter and a frequency measurement device; The pulse counter and the frequency measuring device are connected; The current pulse counter is connected in series in the current loop. The current pulse counter is used to measure the number of current pulses in the current loop within a preset period and send the number of current pulses to the frequency measuring device. The frequency measuring device is used to determine the turbine speed based on the number of current pulses.

2. The system as described in claim 1, characterized in that, The system also includes: a display module; The frequency measurement module is also used to send the determined turbine rotation speed to the display module; The display module is used to display the rotational speed of the water turbine.

3. A method for measuring the speed of a magnetoelectric turbine based on the magnetoelectric turbine speed measurement system according to any one of claims 1-2, characterized in that, The method includes: An alternating magnetic field generation module is installed on the main shaft of the turbine to be tested, and generates an alternating magnetic field corresponding to the turbine when the turbine is rotating. The electromotive force of the turbine under test is determined based on the alternating magnetic field corresponding to the turbine under test. The rotational speed of the turbine to be tested is determined based on the electromotive force corresponding to the turbine to be tested.

4. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in claim 3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in claim 3.

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