Adjusting method and system of vibration absorption device and fan

Abstract

The invention relates to the technical field of noise reduction control, in particular to an adjusting method and system of a vibration absorption device and a fan. The method comprises the following steps: acquiring first vibration change information and second vibration change information; under the condition that the information difference between the first vibration change information and the second vibration change information meets a preset difference value condition, determining the inherent frequency corresponding to the first vibration change information as a target inherent frequency; acquiring third vibration change information; when the third vibration change information meets a preset condition, current damping corresponding to the vibration absorption device is determined as target damping; in the operation process of the fan, the vibration absorption device is controlled to operate based on the target fixed frequency and the target damping; the adjusting method of the vibration absorption device is provided, so that the noise reduction effect of the vibration absorption device on the fan is improved, and the noise of the fan is reduced.

Description

Technical Field

[0001] This application relates to the field of noise reduction and control technology, and in particular to a method, system and fan for adjusting a vibration absorption device. Background Technology

[0002] During operation, the fan casing vibrates along with the motor, generating noise. In existing technologies, the noise of the fan is usually reduced by adjusting the shape of the fan casing. However, the optimization of the fan casing shape is often limited by assembly and manufacturing costs. On the other hand, vibration absorbers can be used to reduce the noise of centrifugal fans, but in practical applications, due to differences in the installation position of the vibration absorbers and changes in the operating frequency of the fan, the noise reduction effect of the vibration absorbers is not good. Summary of the Invention

[0003] In view of the above-mentioned problems in the prior art, the purpose of this application is to provide an adjustment method for a vibration absorption device, thereby improving the noise reduction effect of the vibration absorption device on the fan and reducing the fan noise.

[0004] To address the aforementioned problems, this application provides a method for adjusting a vibration-absorbing device, applied to a fan, wherein the fan's volute surface is provided with a vibration-absorbing device, and the method includes: Acquire first vibration change information and second vibration change information; the first vibration change information and the second vibration change information are the vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping. When the information difference between the first vibration change information and the second vibration change information meets a preset difference condition, the natural frequency corresponding to the first vibration change information is determined as the target natural frequency; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference. Obtain third vibration change information; the third vibration change information is the vibration change information of the fan when the vibration absorption device operates at the target natural frequency and at least one damping to be determined; When the third vibration change information meets the preset conditions, the current damping of the vibration absorption device is determined as the target damping; the preset conditions indicate that the peak height of the third vibration curve corresponding to the third vibration change information is less than the height corresponding to the two intersection points. During the operation of the fan, the vibration absorption device is controlled based on the target fixed frequency and the target damping.

[0005] In this embodiment of the application, obtaining the first vibration change information and the second vibration change information includes: Obtain the first preset voltage, the second preset voltage, and the current vibration absorption frequency; Based on the first preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the first vibration change information corresponding to the first preset voltage; the preset operating state is the operating state in which the fan speed is increased sequentially. Based on the second preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the second vibration change information corresponding to the second preset voltage.

[0006] In this embodiment of the application, determining the natural frequency corresponding to the first vibration change information as the target natural frequency when the information difference between the first vibration change information and the second vibration change information satisfies a preset difference condition includes: If the information difference between the first vibration change information and the second vibration change information meets a preset difference condition, the current vibration absorption frequency is determined as the target natural frequency.

[0007] In this embodiment of the application, the adjustment method of the vibration absorption device further includes: If the information difference between the first vibration change information and the second vibration change information does not meet the preset difference condition, the current vibration absorption frequency is updated based on the preset increase frequency to obtain the updated current vibration absorption frequency. Repeated execution: The vibration absorption device is controlled to operate synchronously under the preset operating state of the fan based on the first preset voltage and the current vibration absorption frequency to obtain the first vibration change information corresponding to the first preset voltage, until the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan based on the second preset voltage and the current vibration absorption frequency to obtain the second vibration change information corresponding to the second preset voltage, until the information difference between the first vibration change information and the second vibration change information meets the preset difference condition.

[0008] In this embodiment of the application, obtaining the third vibration change information includes: Obtain the current test voltage; the damping to be determined corresponds to the current test voltage; Based on the target natural frequency and the current test voltage, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the third vibration change information corresponding to the current test voltage; the preset operating state is the operating state in which the fan speed is increased sequentially.

[0009] In this embodiment of the application, the step of determining the current damping of the vibration absorption device as the target damping when the third vibration change information meets the preset conditions includes: If the third vibration change information meets the preset conditions, the current test voltage is determined as the target voltage; The target damping is determined based on the target voltage.

[0010] In this embodiment of the application, the adjustment method of the vibration absorption device further includes: If the third vibration change information does not meet the preset conditions, the current test voltage is updated based on the preset increase voltage to obtain the updated current test voltage; Repeated execution: Based on the target natural frequency and the current test voltage, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the third vibration change information corresponding to the current test voltage, until the third vibration change information meets the preset conditions.

[0011] In this embodiment of the application, the step of controlling the vibration absorption device to operate synchronously under the preset operating state of the fan based on the first preset voltage and the current vibration absorption frequency, and obtaining the first vibration change information corresponding to the first preset voltage, includes: The current rotational speed of the fan, the running time of the fan, the resonant frequency, and the increase in rotational speed are obtained; the resonant frequency is the frequency of the highest amplitude of the fan when the vibration absorption device is not in operation; The fan is controlled to run at the current speed for the specified duration, and the vibration absorption device is controlled to run synchronously based on the first preset voltage and the current vibration absorption frequency, thereby obtaining vibration information corresponding to the current speed. The current rotational speed is updated based on the increased rotational speed to obtain the updated current rotational speed; If the relationship between the current rotational frequency corresponding to the current rotational speed and the resonance frequency does not meet the preset comparison relationship, the following steps are repeated: control the fan to run at the current rotational speed for the specified running time and control the vibration absorption device to run synchronously based on the first preset voltage and the current vibration absorption frequency to obtain the vibration information corresponding to the current rotational speed, update the current rotational speed based on the increased rotational speed to obtain the updated current rotational speed, until the relationship between the current rotational frequency corresponding to the current rotational speed and the resonance frequency meets the preset comparison relationship; The first vibration change information corresponding to the first preset voltage is determined based on historical vibration information; the historical vibration information is a set of vibration information obtained by the vibration absorption device during operation at the first preset voltage and the current vibration absorption frequency.

[0012] On the other hand, this application also provides an adjustment system for a vibration-absorbing device, applied to a fan, wherein the fan's volute surface is provided with a vibration-absorbing device, and the system includes: The first information acquisition module is used to acquire first vibration change information and second vibration change information; the first vibration change information and the second vibration change information are the vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping. The frequency determination module is used to determine the natural frequency corresponding to the first vibration change information as the target natural frequency when the information difference between the first vibration change information and the second vibration change information meets a preset difference condition; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference. The second information acquisition module is used to acquire the third vibration change information; the third vibration change information is the vibration change information of the fan when the vibration absorption device operates at the target natural frequency and at least one damping to be determined. A damping determination module is used to determine the current damping of the vibration absorption device as the target damping when the third vibration change information meets a preset condition; the preset condition indicates that the peak height of the third vibration curve corresponding to the third vibration change information is less than the height corresponding to the two intersection points. The operation control module is used to control the operation of the vibration absorption device based on the target fixed frequency and the target damping during the operation of the fan.

[0013] On the other hand, this application also provides a fan, including a volute and a vibration absorption device, wherein the vibration absorption device is disposed on the surface of the volute, and the vibration absorption device is adjusted using the vibration absorption device adjustment method described in the embodiments of this application.

[0014] On the other hand, this application also provides an electronic device, the device including a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to implement the adjustment method of the vibration damping device as described above.

[0015] On the other hand, this application also provides a computer storage medium storing at least one instruction or at least one program, wherein the at least one instruction or the at least one program is loaded and executed by a processor to implement the adjustment method of the vibration damping device described above.

[0016] Due to the above technical solution, the adjustment method of the vibration absorption device described in this application has the following beneficial effects: By determining the target natural frequency when the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference, the optimal harmony of the vibration absorption device is ensured. By determining the target damping when the peak height of the third vibration change information is less than or equal to the heights corresponding to the two intersection points, the current damping is determined as the target damping, thereby ensuring the optimal damping of the vibration absorption device. In other words, the optimal harmony and optimal damping of the vibration absorption device are ensured simultaneously during the operation of the fan, thereby improving the vibration absorption performance of the vibration absorption device and reducing the noise of the fan. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 is a structural schematic diagram of a fan provided in an embodiment of this application; Figure 2 is a schematic diagram of the structure of a vibration absorption device in a fan provided in an embodiment of this application; Figure 3 is a structural schematic diagram of a vibration absorption device in a fan provided in another embodiment of this application; Figure 4 is a schematic flowchart of an adjustment method for a vibration absorption device provided in an embodiment of this application; Figure 5 is a reference to the first vibration curve and the second vibration curve not meeting the preset difference condition in the adjustment method of the vibration absorption device provided in the embodiment of this application; Figure 6 is a comparison diagram of the curves after the target natural frequency and target damping operation in the adjustment method of the vibration absorption device provided in the embodiment of this application with other curves; Figure 7 is a schematic diagram of the process for determining the natural frequency of a vibration-absorbing device in an adjustment method of a vibration-absorbing device provided in an embodiment of this application; Figure 8 is a schematic diagram of the process for determining the target damping of a vibration-absorbing device in an adjustment method of a vibration-absorbing device provided in an embodiment of this application; Figure 9 is a schematic diagram of the first vibration change information acquisition process in the adjustment method of a vibration absorption device provided in an embodiment of this application; Figure 10 is a schematic diagram of the adjustment system structure of a vibration absorption device provided in an embodiment of this application; Figure 11 is a schematic diagram of the hardware framework of an adjustment method for a vibration absorption device provided in an embodiment of this application.

[0019] Among them, 1-volute, 2-vibration absorption device, 21-mass block, 22-vibrating plate, 23-clamping unit, 24-buffer unit, 25-outer shell, 26-telescopic unit, 27-electromagnetic winding unit, 28-magnetic conductor, 29-vibration sensor. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0022] Combination Figure 1 This application provides a fan, including a volute 1 and a vibration absorption device 2. The vibration absorption device 2 is disposed on the surface of the volute 1 and is used to absorb vibration and reduce noise in the volute 1. The vibration absorption device 2 is adjusted using the adjustment method provided in this application to ensure the vibration absorption performance of the vibration absorption device 2.

[0023] In a specific embodiment of this application, the vibration absorption device 2 includes a mass block 21, a frequency adjustment module, and a damping adjustment module. The mass block 21 is used to counteract the vibration energy of the main system through inertial force. The frequency adjustment module is used to adjust the natural frequency of the vibration absorption device 2, which refers to the frequency of the vibration absorption device 2 when it vibrates freely without damping. The damping adjustment module is used to adjust the damping of the vibration absorption device 2, which refers to the ability of the vibration absorption device 2 to consume vibration energy. The relative position of the mass block 21 remains unchanged.

[0024] refer to Figure 2 In a specific embodiment of this application, the frequency adjustment module may include a drive unit and a vibrating plate 22 structure. The vibrating plate 22 is disposed above the mass block 21 and fixedly connected to the mass block 21. The drive unit is used to adjust the tension of the vibrating plate 22 to adjust the natural frequency of the vibration absorption device 2. Specifically, the drive unit may include a motor, preferably a stepper motor, and the vibrating plate may be bonded to the mass block 21. The damping adjustment module may use a clamping unit 23, which is disposed on both sides of the mass block 21. The clamping unit 23 is used to adjust the clamping force of the mass block 21 and the friction force of the mass block 21 to adjust the damping of the vibration absorption device 2. Specifically, the clamping unit 23 may include two opposing electromagnetic clamping blocks, and the clamping force of the clamping unit 23 is adjusted by adjusting the current flowing through the electromagnetic clamping blocks.

[0025] In a specific embodiment of this application, the frequency adjustment module further includes a housing 25, which includes a receiving cavity. The frequency adjustment module, the mass block 21, and the damping adjustment module are disposed within the receiving cavity of the housing 25.

[0026] In a specific embodiment of this application, the outer casing 25 further includes a clamping mounting plate, and the clamping unit 23 is fixedly connected to the clamping mounting plate.

[0027] In a specific embodiment of this application, a buffer unit 24 is provided between the clamping unit 23 and the mounting plate. Preferably, the buffer unit 24 is a buffer rubber. By providing a buffer rubber between the clamping unit 23 and the mounting plate, the impact of frictional vibration between the clamping unit 23 and the mass block 21 on the vibration of the outer shell 25 can be reduced, thereby improving the vibration absorption performance of the vibration absorption device 2. Compared with a fixed connection, the buffer rubber connection makes the resistance when the two electromagnet clamping blocks attract and clamp the mass block 21 smaller, and the required clamping force can be achieved with a small voltage, reducing the energy consumption of the vibration absorption device 2.

[0028] refer to Figure 3In another specific embodiment of this application, the frequency adjustment module may further include a drive unit and a telescopic unit 26. The drive unit is used to control the telescopic unit 26 to perform telescopic movement. The end of the telescopic unit 26 is fixedly connected to the mass block 21. The mass block 21 may be a ring structure. Specifically, the drive unit controls the telescopic unit 26 to extend and retract, thereby adjusting the natural frequency of the vibration absorption device 2. The damping adjustment module includes a battery unit, an electromagnetic winding unit 27, and two magnetic conductors 28. The electromagnetic winding unit 27 is arranged opposite to the mass block 21. The magnetic conductors 28 are arranged on both sides of the mass block 21. The surface where the electromagnetic winding unit 27 is located and the surface where the two magnetic conductors 28 are located form an enclosing space surrounding the mass block 21. By adjusting the current flowing through the electromagnetic winding unit 27, the magnetic field strength between the two magnetic conductors 28 is adjusted, thereby adjusting the resistance encountered by the mass block 21 during its up-and-down vibration, and thus adjusting the damping of the vibration absorption device 2.

[0029] In a specific embodiment of this application, the vibration absorption device 2 further includes a vibration sensor 29, which is disposed on the housing 25. The vibration sensor 29 is used to detect the vibration state of the vibration absorption device 2, and thus can determine the vibration state of the centrifugal fan based on the vibration state of the vibration absorption device 2.

[0030] Combination Figure 4 This application describes an adjustment method for a vibration-absorbing device according to an embodiment, comprising: S1001. Obtain first vibration change information and second vibration change information; the first vibration change information and second vibration change information are vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping.

[0031] In a specific embodiment of this application, the difference between the first vibration change information and the second vibration change information is based on the operation of the vibration absorption device under different damping conditions; the first vibration change information and the second vibration change information include multiple vibration data groups, each vibration data group including a frequency ratio and an amplitude ratio. The frequency ratio refers to the ratio of the natural frequency of the vibration absorption device to the natural frequency of the fan, and the amplitude ratio refers to the ratio of the amplitude of the vibration absorption device to the amplitude of the fan.

[0032] S1002. When the information difference between the first vibration change information and the second vibration change information meets the preset difference condition, the natural frequency corresponding to the first vibration change information is determined as the target natural frequency; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than the preset height difference.

[0033] In a specific embodiment of this application, the information difference between the first vibration change information and the second vibration change information satisfies a preset difference condition, indicating that both the first vibration curve and the second vibration curve are symmetrical curves, and the axis of symmetry of the first vibration curve and the axis of symmetry of the second vibration curve are the same axis of symmetry; on the other hand, the information difference between the first vibration change information and the second vibration change information satisfies a preset difference condition, indicating that the vibration absorption device operates based on the optimal natural frequency, which is adapted to various operating frequencies of the fan.

[0034] In a specific embodiment of this application, the first vibration curve and the second vibration curve are frequency response curves. Specifically, the frequency response curve is a mapping curve of frequency ratio and amplitude ratio. The frequency ratio is the ratio of the natural frequency of the vibration absorption device to the natural frequency of the fan, and the amplitude ratio is the ratio of the amplitude of the vibration absorption device to the amplitude of the fan.

[0035] S1003. Obtain the third vibration change information; the third vibration change information is the vibration change information of the fan under the operation of the vibration absorption device at the target natural frequency and at least one damping to be determined.

[0036] In specific embodiments of this application, different damping to be determined corresponds to different third vibration change information.

[0037] S1004. When the third vibration change information meets the preset conditions, the current damping of the vibration absorption device is determined as the target damping; the preset conditions indicate that the peak height of the third vibration curve corresponding to the third vibration change information is less than or equal to the height corresponding to the two intersection points.

[0038] In a specific embodiment of this application, the current damping refers to the damping value of the vibration absorption device when the third vibration change information meets the preset conditions.

[0039] In a specific embodiment of this application, the third vibration change information meeting the preset conditions indicates that the peak value and the fluctuation range of the peak and valley of the third vibration curve are small; on the other hand, the third vibration change information meeting the preset conditions indicates that the vibration absorption device is based on optimal damping operation and has a small average amplitude among various operating frequencies of the fan.

[0040] refer to Figure 5The first vibration curve and the second vibration curve are drawn as two solid lines, while the dashed curve refers to the curve recorded when the fan is not in operation of the vibration absorption device. When the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is greater than the preset height difference, the height difference between the intersection points P and Q of the first vibration curve and the second vibration curve is relatively large. This indicates that the vibration absorption effect of the vibration absorption device is not uniform, which will cause the centrifugal fan to have low noise at some frequencies and high noise at other frequencies. Therefore, it is necessary to adjust the natural frequency of the vibration absorption device to redetermine the first vibration change information and the second vibration change information.

[0041] refer to Figure 6 The first vibration curve and the second vibration curve are drawn as two solid lines, while the dashed curve refers to the curve recorded when the fan is not in operation with the vibration absorption device. When the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than the preset height difference, preferably, the height difference between the intersection points P and Q of the first vibration curve and the second vibration curve is 0. This ensures that the noise reduction of the vibration absorption device is uniform and symmetrical in the fan's operating frequency range. If the peak values ​​of the first vibration curve and the second vibration curve are less than or equal to the heights corresponding to the two intersection points, this indicates that after the vibration absorption device is in operation, the overall amplitude difference of the fan will not be too large, and thus the noise difference of the fan in the entire operating frequency range will not be large.

[0042] In a specific embodiment of this application, Figure 6 The curve with the lowest peak value corresponds to the vibration change information of the vibration absorption device under the target natural frequency and target damping; its overall amplitude is uniform and small during the operation of the fan.

[0043] In a specific embodiment of this application, the slope value of the tangent at the intersection point and the amplitude ratio are combined during the determination of the two intersection points to avoid the two intersection points being determined as the intersection points of the left and right sides.

[0044] S1005. During the operation of the wind turbine, the vibration absorption device is controlled based on the target fixed frequency and the target damping.

[0045] In this embodiment, when the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference, the natural frequency corresponding to the first vibration change information is determined as the target natural frequency, thereby ensuring optimal synchronization of the vibration absorption device; when the peak height of the third vibration change information is less than or equal to the height corresponding to the two intersection points, the current damping is determined as the target damping, thereby ensuring optimal damping of the vibration absorption device; that is, simultaneously ensuring optimal synchronization and optimal damping of the vibration absorption device during the operation of the fan, improving the vibration absorption performance of the vibration absorption device, and thus reducing the noise of the fan.

[0046] refer to Figure 7 In this embodiment of the application, S1001 includes: S2001. Obtain the first preset voltage, the second preset voltage, and the current vibration absorption frequency.

[0047] In specific embodiments of this application, the first preset voltage and the second preset voltage are both used to determine the clamping force of the clamping unit or the magnetic field strength between the two magnetic conductors, thereby determining the damping of the vibration absorption device; that is, the first preset voltage and the second preset voltage correspond to different damping of the vibration absorption device.

[0048] In a specific embodiment of this application, the current vibration absorption frequency is determined based on a preset initial vibration absorption frequency and a preset increase frequency.

[0049] S2002. Based on the first preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously in the preset operating state of the fan to obtain the first vibration change information corresponding to the first preset voltage; the preset operating state is the operating state in which the fan speed increases sequentially.

[0050] S2003. Based on the second preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the second vibration change information corresponding to the second preset voltage.

[0051] In this embodiment, by controlling the vibration absorption device and the fan to operate synchronously, the actual vibration absorption effect of the vibration absorption device on the fan is ensured, thereby improving the matching between the vibration absorption device and the fan itself, and thus improving the noise reduction performance of the fan.

[0052] In this embodiment of the application, S1002 includes: S2004. If the information difference between the first vibration change information and the second vibration change information meets the preset difference condition, the current vibration absorption frequency is determined as the target natural frequency.

[0053] In this embodiment of the application, by using a first preset voltage and a second preset voltage to form a comparison of first vibration change information and second vibration change information at the same current vibration absorption frequency, the similarity between the first vibration change information and the second vibration change information is used to determine whether the same current vibration absorption frequency is the optimal natural frequency, thereby improving the accuracy of the optimal natural frequency judgment, improving the vibration absorption performance of the vibration absorption device, and thus reducing the noise of the fan.

[0054] In this embodiment of the application, the method for adjusting the vibration absorption device further includes: S4001. If the information difference between the first vibration change information and the second vibration change information does not meet the preset difference condition, the current vibration absorption frequency is updated based on the preset increase frequency to obtain the updated current vibration absorption frequency.

[0055] In a specific embodiment of this application, the current vibration absorption frequency can be updated using the following formula:

[0056] in, The updated current absorption frequency. The current absorption frequency before the update. To increase the preset frequency, This is the preset initial vibration absorption frequency.

[0057] S4002, Repeat execution: S2002-S2003 until the information difference between the first vibration change information and the second vibration change information meets the preset difference condition.

[0058] In this embodiment, the current vibration absorption frequency is continuously updated based on a preset increasing frequency to determine the optimal natural frequency, thereby improving the accuracy of determining the optimal natural frequency, improving the vibration absorption performance of the vibration absorption device, and thus reducing the noise of the fan.

[0059] In a specific embodiment of this application, the first preset voltage Second preset voltage and initial absorption frequency Vibration damping device based on as well as The first vibration change information was obtained by operating synchronously with the wind turbine. Vibration absorption device based on as well as The second vibration change information was obtained by operating synchronously with the fan. ;like as well as If the preset difference condition is not met, the frequency will be increased based on the preset value. and initial absorption frequency Update the current vibration absorption frequency to ,in, Vibration damping device based on as well as The first vibration change information was obtained by operating synchronously with the wind turbine. Vibration absorption device based on as well as The second vibration change information was obtained by operating synchronously with the fan. ;like as well as If the preset difference condition is still not met, then the frequency will be increased based on the preset value. as well as Update the current vibration absorption frequency to ,in, Vibration damping device based on as well as The first vibration change information was obtained by operating synchronously with the wind turbine. Vibration absorption device based on as well as The second vibration change information was obtained by operating synchronously with the fan. And so on, until... as well as If the preset difference condition is met, It was determined to be the target's inherent frequency.

[0060] refer to Figure 8 In this embodiment of the application, S1003 includes: S5001, Obtain the current test voltage; The damping to be determined corresponds to the current test voltage.

[0061] In a specific embodiment of this application, the current test voltage is used to determine the clamping force of the clamping unit or the magnetic field strength between the two magnetic conductors, thereby determining the damping of the vibration absorption device; that is, different current test voltages correspond to different damping to be determined. Since their specific mapping relationship is different based on structural differences, no further limitations are made here.

[0062] In a specific embodiment of this application, the current test voltage is determined based on a preset initial test voltage and a preset additional voltage, wherein the initial test voltage corresponds to the initial test damping.

[0063] S5002. Based on the target natural frequency and the current test voltage, the vibration absorption device is controlled to operate synchronously in the preset operating state of the fan to obtain the third vibration change information corresponding to the current test voltage; the preset operating state is the operating state in which the fan speed increases sequentially.

[0064] In this embodiment, by synchronizing the vibration absorption device with the fan based on the target natural frequency and the current test voltage, the vibration absorption device is ensured to match the actual vibration absorption effect with the fan, thereby improving the matching between the vibration absorption device and the fan and thus improving the noise reduction performance of the fan.

[0065] In this embodiment of the application, S1004 includes: S6001. If the third vibration change information meets the preset conditions, the current test voltage is determined as the target voltage.

[0066] S6002, Determine the target damping based on the target voltage.

[0067] In a specific embodiment of this application, since the damping of the vibration absorption device is adjusted by changing the voltage of the vibration absorption device during the actual control process, the target voltage can be directly equivalent to the target damping, or the target damping corresponding to the target voltage can be calculated based on the mapping relationship between voltage and damping.

[0068] In this embodiment, by keeping the natural frequency of the vibration absorption device unchanged, the current test voltage is changed so that the third vibration change information under the current test voltage meets the preset conditions, thereby improving the accuracy of the determination of the target voltage and the target damping, improving the vibration absorption performance of the vibration absorption device, and thus reducing the noise of the fan.

[0069] In this embodiment of the application, the method for adjusting the vibration absorption device further includes: S7001. If the third vibration change information does not meet the preset conditions, update the current test voltage based on the preset increase voltage to obtain the updated current test voltage.

[0070] In a specific embodiment of this application, the current test voltage can be updated using the following formula:

[0071] in, The updated current test voltage, The current test voltage before the update. To increase the voltage to the preset value, This is the preset initial test voltage.

[0072] S7002, Repeat execution: S5002, until the third vibration change information meets the preset conditions.

[0073] In this embodiment, the current test voltage is continuously updated based on a preset voltage increase to determine the optimal test voltage, thereby determining the optimal damping, improving the accuracy of the optimal damping determination, improving the vibration absorption performance of the vibration absorption device, and reducing the noise of the fan.

[0074] In a specific embodiment of this application, the target inherent frequency and initial test voltage Vibration damping device based on as well as Synchronized with the wind turbine, the third vibration change information was obtained. ;like If the preset conditions are not met, increase the voltage based on the preset conditions. and initial test voltage Update the current test voltage to ,in, Vibration damping device based on as well as Synchronized with the wind turbine, the third vibration change information was obtained. ;like The preset conditions are still not met; the voltage is increased based on the preset values. and the current test voltage Update the current test voltage to ,in, Vibration damping device based on as well as Synchronized with the wind turbine, the third vibration change information was obtained. ;like The preset conditions are still not met; the voltage is increased based on the preset values. and the current test voltage Update the current test voltage to ,in, And so on, until... If the preset conditions are met, Determine the target voltage, and... The corresponding damping is determined as the target damping.

[0075] refer to Figure 9 In this embodiment of the application, S2002 includes: S8001: Obtain the current speed of the fan, the running time of the fan, the resonant frequency, and the speed increase; the resonant frequency is the frequency of the highest amplitude of the fan when the vibration absorption device is not running; the current speed of the fan refers to the target speed for controlling the operation of the fan; the running time of the fan refers to the duration for which the fan is controlled to run at the same speed; the speed increase refers to the increment value of the speed during the process of gradually increasing the speed of the fan.

[0076] In a specific embodiment of this application, different rotational speeds of the fan correspond to different natural frequencies of the fan.

[0077] In the specific implementation of this application, the current rotational speed is determined based on the preset initial rotational speed and the increase in rotational speed.

[0078] S8002, control the fan to run at the current speed for the above-mentioned running time, and control the vibration absorption device to run synchronously based on the first preset voltage and the current vibration absorption frequency, to obtain the vibration information corresponding to the current speed; the vibration information includes the amplitude of the vibration absorption device, the amplitude of the fan, and the amplitude ratio of the vibration absorption device to the fan.

[0079] S8003. Update the current speed based on the increased speed to obtain the updated current speed.

[0080] In a specific embodiment of this application, the current rotational speed can be updated using the following formula:

[0081] in, The updated current speed, The current rotational speed before the update. To increase the rotational speed, This is the preset initial rotational speed.

[0082] S8004. If the relationship between the current rotational frequency and the resonance frequency corresponding to the current rotational speed does not meet the preset comparison relationship, repeat the following steps: S8002-S8003 until the relationship between the current rotational frequency and the resonance frequency corresponding to the current rotational speed meets the preset comparison relationship. The preset comparison relationship can refer to the current rotational frequency being greater than twice the resonance frequency.

[0083] In a specific embodiment of this application, the current frequency and the current rotational speed are reciprocals of each other.

[0084] S8005. Determine the first vibration change information corresponding to the first preset voltage based on historical vibration information; historical vibration information is a set of vibration information obtained by the vibration absorption device during operation at the first preset voltage and the current vibration absorption frequency.

[0085] In this embodiment, by ensuring that the operating parameters of the vibration absorption device remain unchanged, different vibration information at different speed stages of the fan is obtained, and the different vibration information at different speed stages is integrated to obtain vibration change information, thereby improving the matching between the vibration change information and the actual operation of the fan, thereby improving the vibration absorption performance of the vibration absorption device and reducing the noise of the fan.

[0086] In specific embodiments of this application, the determination methods for the second vibration change information and the third vibration change information are similar to those for the determination of the first vibration change information, and will not be elaborated further here.

[0087] In a specific embodiment of this application, the initial rotational speed Running time T, resonant frequency And increase the speed Centrifugal fan Running time T, vibration absorption device as well as Synchronous operation, obtain Corresponding vibration information; if Update the current speed Centrifugal fan Running time T, vibration absorption device as well as Synchronous operation, obtain Corresponding vibration information; if Update the current speed Centrifugal fan Running time T, vibration absorption device as well as Synchronous operation, obtain The corresponding vibration information; and so on, until... Based on historical vibration information, namely ( , , … The corresponding vibration information determines the first vibration change information. .

[0088] In a specific embodiment of this application, , as well as Reference for determination method The method for determining this will not be elaborated upon here.

[0089] The vibration absorption device adjustment method in this application embodiment has the following beneficial effects: By determining the target natural frequency when the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference, the optimal harmony of the vibration absorption device is ensured. By determining the target damping when the peak height of the third vibration change information is less than or equal to the heights corresponding to the two intersection points, the current damping is determined as the target damping, thereby ensuring the optimal damping of the vibration absorption device. In other words, the optimal harmony and optimal damping of the vibration absorption device are ensured simultaneously during the operation of the fan, thereby improving the vibration absorption performance of the vibration absorption device and reducing the noise of the fan.

[0090] refer to Figure 10 This application embodiment also provides an adjustment system for a vibration absorption device, the system comprising: The first information acquisition module 101 is used to acquire first vibration change information and second vibration change information; the first vibration change information and the second vibration change information are vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping.

[0091] The frequency determination module 102 is used to determine the natural frequency corresponding to the first vibration change information as the target natural frequency when the information difference between the first vibration change information and the second vibration change information meets the preset difference condition; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than the preset height difference.

[0092] The second information acquisition module 103 is used to acquire the third vibration change information; the third vibration change information is the vibration change information of the fan under the operation of the vibration absorption device at the target natural frequency and at least one damping to be determined.

[0093] The damping determination module 104 is used to determine the current damping of the vibration absorption device as the target damping when the third vibration change information meets the preset conditions; the preset conditions indicate that the peak height of the third vibration curve corresponding to the third vibration change information is less than or equal to the height corresponding to the two intersection points.

[0094] The operation control module 105 is used to control the operation of the vibration absorption device based on the target fixed frequency and target damping during the operation of the wind turbine.

[0095] The first information acquisition module includes: The first information acquisition unit is used to acquire the first preset voltage, the second preset voltage, and the current vibration absorption frequency.

[0096] The first change information determination unit is used to control the vibration absorption device to operate synchronously under the preset operating state of the fan based on the first preset voltage and the current vibration absorption frequency, so as to obtain the first vibration change information corresponding to the first preset voltage; the preset operating state is the operating state in which the fan speed increases sequentially.

[0097] The second change information determination unit is used to control the vibration absorption device to operate synchronously under the preset operating state of the fan based on the second preset voltage and the current vibration absorption frequency, so as to obtain the second vibration change information corresponding to the second preset voltage.

[0098] The frequency determination module includes: The frequency determination unit is used to determine the current vibration absorption frequency as the target natural frequency when the information difference between the first vibration change information and the second vibration change information meets the preset difference condition.

[0099] The adjustment system of the vibration damping device also includes: The frequency update module is used to update the current vibration absorption frequency based on a preset increase frequency when the information difference between the first vibration change information and the second vibration change information does not meet the preset difference condition, so as to obtain the updated current vibration absorption frequency.

[0100] The first loop module is used to repeatedly execute: controlling the vibration absorption device to operate synchronously under the preset operating state of the fan based on the first preset voltage and the current vibration absorption frequency to obtain the first vibration change information corresponding to the first preset voltage, and then controlling the vibration absorption device to operate synchronously under the preset operating state of the fan based on the second preset voltage and the current vibration absorption frequency to obtain the second vibration change information corresponding to the second preset voltage, until the information difference between the first vibration change information and the second vibration change information meets the preset difference condition.

[0101] The second information acquisition module includes: The voltage acquisition unit is used to acquire the current test voltage; the damping to be determined corresponds to the current test voltage.

[0102] The third change information determination unit is used to control the vibration absorption device to operate synchronously under the preset operating state of the fan based on the target natural frequency and the current test voltage, so as to obtain the third vibration change information corresponding to the current test voltage; the preset operating state is the operating state in which the fan speed increases sequentially.

[0103] The damping determination module includes: The voltage determination unit is used to determine the current test voltage as the target voltage when the third vibration change information meets the preset conditions.

[0104] Damping determination unit, used to determine target damping based on target voltage.

[0105] The adjustment system of the vibration damping device also includes: The voltage update module is used to update the current test voltage based on a preset voltage increase when the third vibration change information does not meet the preset conditions, so as to obtain the updated current test voltage.

[0106] The second loop module is used to repeatedly execute: the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan based on the target natural frequency and the current test voltage, to obtain the third vibration change information corresponding to the current test voltage, until the third vibration change information meets the preset conditions.

[0107] The first change information determination unit includes: The operating parameter acquisition unit is used to acquire the current speed of the fan, the running time of the fan, the resonant frequency, and the speed increase; the resonant frequency is the frequency of the highest amplitude of the fan when the vibration absorption device is not running.

[0108] The operation control unit is used to control the fan to run at the current speed for the above-mentioned running time and to control the vibration absorption device to run synchronously based on the first preset voltage and the current vibration absorption frequency, so as to obtain the vibration information corresponding to the current speed.

[0109] The speed update unit is used to update the current speed based on the increased speed, so as to obtain the updated current speed.

[0110] The third cycle unit is used to repeatedly execute the following steps when the relationship between the current rotational frequency and the resonant frequency corresponding to the current rotational speed does not meet the preset comparison relationship: control the fan to run at the current rotational speed for the above-mentioned running time and control the vibration absorption device to run synchronously based on the first preset voltage and the current vibration absorption frequency to obtain the vibration information corresponding to the current rotational speed, update the current rotational speed based on the increase of rotational speed to obtain the updated current rotational speed, until the relationship between the current rotational frequency and the resonant frequency corresponding to the current rotational speed meets the preset comparison relationship.

[0111] The information determination unit is used to determine the first vibration change information corresponding to the first preset voltage based on historical vibration information; the historical vibration information is a set of vibration information obtained by the vibration absorption device during operation at the first preset voltage and the current vibration absorption frequency.

[0112] This application also provides an electronic device, which includes a processor and a memory. The memory stores at least one instruction or at least one program. The processor loads and executes the at least one instruction or at least one program to implement the vibration device adjustment method described above.

[0113] Memory is used to store software programs and modules. The processor executes these stored software programs and modules to perform various functional applications and data processing. Memory can primarily consist of a program storage area and a data storage area. The program storage area stores the operating system, application programs required for functionality, etc.; the data storage area stores data created based on device usage, etc. Furthermore, memory can include high-speed random access memory (RAM) and non-volatile memory, such as at least one hard disk drive, flash memory, or other volatile solid-state storage devices. Correspondingly, memory can also include a memory controller to provide the processor with access to the memory.

[0114] The methods and embodiments provided in this application can be executed in electronic devices such as mobile terminals, computer terminals, servers, or similar computing devices. Figure 11 This is the electronic device provided in the embodiments of this application. For example... Figure 11As shown, the electronic device 900 can vary significantly due to differences in configuration or performance. It may include one or more central processing units (CPUs) 910 (CPUs 910 may include, but are not limited to, microprocessors such as MCUs or programmable logic devices such as FPGAs), a memory 930 for storing data, and one or more storage media 920 (e.g., one or more mass storage devices) for storing application programs 923 or data 922. The memory 930 and storage media 920 may be temporary or persistent storage. The program stored in the storage media 920 may include one or more modules, each module may include a series of instruction operations on the electronic device. Furthermore, the CPU 910 may be configured to communicate with the storage media 920 and execute the series of instruction operations in the storage media 920 on the electronic device 900. Electronic device 900 may also include one or more power supplies 960, one or more wired or wireless network interfaces 950, one or more input / output interfaces 940, and / or one or more operating systems 921, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.

[0115] The input / output interface 940 can be used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the electronic device 900. In one example, the input / output interface 940 includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the input / output interface 940 may be a radio frequency (RF) module used for wireless communication with the Internet.

[0116] Those skilled in the art will understand that Figure 11 The structure shown is for illustrative purposes only and does not limit the structure of the electronic device described above. For example, the electronic device 900 may also include... Figure 11 The more or fewer components shown, or having the same Figure 11 The different configurations shown.

[0117] Embodiments of this application also provide a storage medium storing at least one instruction or at least one program, wherein the at least one instruction or at least one program is loaded and executed by a processor to implement the vibration device adjustment method as described above.

[0118] The foregoing description has fully disclosed the specific embodiments of this application. It should be noted that any modifications made by those skilled in the art to the specific embodiments of this application do not depart from the scope of the claims. Accordingly, the scope of the claims of this application is not limited to the foregoing specific embodiments.

Claims

1. A method for adjusting a vibration-absorbing device, characterized in that, Applied to a fan, wherein the fan casing surface is provided with a vibration-absorbing device, the method includes: Acquire first vibration change information and second vibration change information; the first vibration change information and the second vibration change information are the vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping. When the information difference between the first vibration change information and the second vibration change information meets a preset difference condition, the natural frequency corresponding to the first vibration change information is determined as the target natural frequency; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference. Obtain third vibration change information; the third vibration change information is the vibration change information of the fan when the vibration absorption device operates at the target natural frequency and at least one damping to be determined; When the third vibration change information meets the preset condition, the current damping of the vibration absorption device is determined as the target damping; the preset condition indicates that the peak height of the third vibration curve corresponding to the third vibration change information is less than the height corresponding to the two intersection points. During the operation of the wind turbine, the vibration absorption device is controlled based on the target fixed frequency and the target damping.

2. The adjustment method of the vibration absorption device according to claim 1, characterized in that, The acquisition of the first vibration change information and the second vibration change information includes: Obtain the first preset voltage, the second preset voltage, and the current vibration absorption frequency; Based on the first preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the first vibration change information corresponding to the first preset voltage; the preset operating state is the operating state in which the fan speed is increased sequentially. Based on the second preset voltage and the current vibration absorption frequency, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the second vibration change information corresponding to the second preset voltage.

3. The adjustment method of the vibration absorption device according to claim 2, characterized in that, The step of determining the natural frequency corresponding to the first vibration change information as the target natural frequency when the information difference between the first vibration change information and the second vibration change information meets a preset difference condition includes: If the information difference between the first vibration change information and the second vibration change information meets a preset difference condition, the current vibration absorption frequency is determined as the target natural frequency.

4. The adjustment method of the vibration absorption device according to claim 2, characterized in that, The method further includes: If the information difference between the first vibration change information and the second vibration change information does not meet the preset difference condition, the current vibration absorption frequency is updated based on the preset increase frequency to obtain the updated current vibration absorption frequency. Repeated execution: The vibration absorption device is controlled to operate synchronously under the preset operating state of the fan based on the first preset voltage and the current vibration absorption frequency to obtain the first vibration change information corresponding to the first preset voltage, until the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan based on the second preset voltage and the current vibration absorption frequency to obtain the second vibration change information corresponding to the second preset voltage, until the information difference between the first vibration change information and the second vibration change information meets the preset difference condition.

5. The adjustment method of the vibration absorption device according to claim 1, characterized in that, The acquisition of the third vibration change information includes: Obtain the current test voltage; the damping to be determined corresponds to the current test voltage; Based on the target natural frequency and the current test voltage, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the third vibration change information corresponding to the current test voltage; the preset operating state is the operating state in which the fan speed is increased sequentially.

6. The adjustment method of the vibration absorption device according to claim 5, characterized in that, The determination of the current damping of the vibration absorption device as the target damping when the third vibration change information meets the preset conditions includes: If the third vibration change information meets the preset conditions, the current test voltage is determined as the target voltage; The target damping is determined based on the target voltage.

7. The adjustment method of the vibration absorption device according to claim 5, characterized in that, The method further includes: If the third vibration change information does not meet the preset conditions, the current test voltage is updated based on the preset increase voltage to obtain the updated current test voltage; Repeated execution: Based on the target natural frequency and the current test voltage, the vibration absorption device is controlled to operate synchronously under the preset operating state of the fan to obtain the third vibration change information corresponding to the current test voltage, until the third vibration change information meets the preset conditions.

8. The adjustment method of the vibration absorption device according to claim 2, characterized in that, The method of controlling the vibration absorption device to operate synchronously with the fan under a preset operating state based on the first preset voltage and the current vibration absorption frequency, and obtaining the first vibration change information corresponding to the first preset voltage, includes: The current rotational speed of the fan, the running time of the fan, the resonant frequency, and the increase in rotational speed are obtained; the resonant frequency is the frequency of the highest amplitude of the fan when the vibration absorption device is not in operation; The fan is controlled to run at the current speed for the specified duration, and the vibration absorption device is controlled to run synchronously based on the first preset voltage and the current vibration absorption frequency, thereby obtaining vibration information corresponding to the current speed. The current rotational speed is updated based on the increased rotational speed to obtain the updated current rotational speed; If the relationship between the current rotational frequency corresponding to the current rotational speed and the resonance frequency does not meet the preset comparison relationship, the following steps are repeated: control the fan to run at the current rotational speed for the specified running time and control the vibration absorption device to run synchronously based on the first preset voltage and the current vibration absorption frequency to obtain the vibration information corresponding to the current rotational speed, update the current rotational speed based on the increased rotational speed to obtain the updated current rotational speed, until the relationship between the current rotational frequency corresponding to the current rotational speed and the resonance frequency meets the preset comparison relationship; The first vibration change information corresponding to the first preset voltage is determined based on historical vibration information; the historical vibration information is a set of vibration information obtained by the vibration absorption device during operation at the first preset voltage and the current vibration absorption frequency.

9. An adjustment system for a vibration damping device, characterized in that, Applied to wind turbines, the surface of the wind turbine casing is provided with a vibration-absorbing device, and the system includes: The first information acquisition module is used to acquire first vibration change information and second vibration change information; the first vibration change information and the second vibration change information are the vibration change information of the fan when the vibration absorption device operates at the same frequency but with different damping. The frequency determination module is used to determine the natural frequency corresponding to the first vibration change information as the target natural frequency when the information difference between the first vibration change information and the second vibration change information meets a preset difference condition; the preset difference condition indicates that the height difference between the two intersection points of the first vibration curve corresponding to the first vibration change information and the second vibration curve corresponding to the second vibration change information is less than a preset height difference. The second information acquisition module is used to acquire the third vibration change information; the third vibration change information is the vibration change information of the fan when the vibration absorption device operates at the target natural frequency and at least one damping to be determined. A damping determination module is used to determine the current damping of the vibration absorption device as the target damping when the third vibration change information meets a preset condition; the preset condition indicates that the peak height of the third vibration curve corresponding to the third vibration change information is less than the height corresponding to the two intersection points. The operation control module is used to control the operation of the vibration absorption device based on the target fixed frequency and the target damping during the operation of the wind turbine.

10. A fan, characterized in that, It includes a volute and a vibration-absorbing device, the vibration-absorbing device being disposed on the surface of the volute, and the vibration-absorbing device being adjusted using the vibration-absorbing device adjustment method as described in any one of claims 1-8.

Images