Vibration reduction method and device for vertical condensate pump

Abstract

The invention provides a vibration reduction method and device for a vertical condensate pump. The vertical condensate pump aims at accurately adjusting resonance points, reducing vibration hazards and improving the running stability of the vertical condensate pump. The vibration reduction method of the vertical condensate pump is applied to the vibration reduction device, and the vibration reduction device comprises a motor, a controller, a fixing support and a lead screw. Acquiring the real-time rotating speed of the vertical condensate pump; on the basis that the real-time rotating speed is matched with a target rotating speed in a preset information base, a vibration reduction adjusting scheme of the vertical condensate pump at the target rotating speed is stored in the preset information base, and the vibration reduction scheme is used for controlling a vibration reduction device to adjust the supporting force of a lead screw for supporting the vertical condensate pump at the target rotating speed. The amplitude data corresponding to the resonance point of the vertical condensate pump is adjusted to be within the corresponding standard amplitude data range; and if the matching is consistent, determining a motor control instruction based on the corresponding vibration reduction adjustment scheme, and sending the motor control instruction to the controller.

Description

Technical Field

[0001] The present application relates to the technical field of water pump resonance treatment, and in particular to a vibration reduction method and device for a vertical condensate pump. Background Art

[0002] As one of the three major pumps in a thermal power unit, a variable-frequency condensate pump undertakes the critical task of extracting condensate from the condenser hot well and transporting it to the deaerator. A vertical condensate pump consists of a vertical drive motor, motor support bolts, an upper support cylinder with an outlet, a lower support cylinder with an inlet, and a coupling connecting the two. During variable-frequency operation of the vertical condensate pump, the inherent frequency differences of its internal components and its asymmetric structural design can cause multiple resonance points at the same speed, leading to accelerated wear of internal components, pipe ruptures, and even system shutdowns, among other safety hazards.

[0003] To address this resonance issue, existing technologies generally employ fine dynamic balancing methods. This method primarily optimizes the mass balance of rotating components in vertical condensate pumps to reduce unbalanced excitation forces. However, due to the mechanical structure and multi-component coupling characteristics of vertical condensate pumps, this mass balancing optimization often causes changes in the system's vibration modes. This can cause components that were originally non-resonant to experience new resonance points due to the altered vibration characteristics caused by dynamic balancing, thus failing to resolve the resonance issue in vertical condensate pumps.

[0004] Therefore, a new method is urgently needed to solve the resonance problem of vertical condensate pumps. Summary of the Invention

[0005] The embodiments of the present application provide a vibration reduction method and device for a vertical condensate pump, the purpose of which is to accurately adjust the resonance point, reduce vibration hazards, and improve the stability of the operation of the vertical condensate pump.

[0006] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] In a first aspect, the present application provides a vibration reduction method for a vertical condensate pump, the method being applied to a vibration reduction device, the vibration reduction device comprising: a motor, a controller, a fixing bracket, and a lead screw, the fixing bracket being mounted on the outside of a vertical drive motor of the vertical condensate pump and being used to fix the motor and one end of the lead screw, the lead screw being arranged opposite to each other along the top of the vertical condensate pump, the other end of the lead screw being in contact with an outer wall of the vertical condensate pump; the method comprising:

[0008] Get the real-time speed of the vertical condensate pump;

[0009] Based on the matching of the real-time speed with the target speed in the preset information library, the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at the target speed, and the vibration reduction scheme is used to control the vibration reduction device to adjust the support force of the lead screw supporting the vertical condensate pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate pump to within the corresponding standard amplitude data range;

[0010] If the match is consistent, a motor control instruction is determined based on the corresponding vibration reduction adjustment scheme, and the motor control instruction is sent to the controller.

[0011] In a second aspect, the present application provides a vibration reduction device for a vertical condensate pump, the device being applied to a vibration reduction device, the vibration reduction device comprising: a motor, a controller, a fixing bracket, and a lead screw, the fixing bracket being mounted on the outside of a vertical drive motor of the vertical condensate pump and being used to fix the motor and one end of the lead screw, the lead screw being arranged opposite to each other along the top of the vertical condensate pump, the other end of the lead screw being in contact with the outer wall of the vertical condensate pump; the device comprising:

[0012] An acquisition unit, used to acquire the real-time speed of the vertical condensate pump;

[0013] a matching unit, configured to match the real-time speed in the acquisition unit with a target speed in a preset information library, wherein the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at the target speed, the vibration reduction scheme being configured to control the vibration reduction device to adjust the support force of the lead screw supporting the vertical condensate pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate pump to within a corresponding standard amplitude data range;

[0014] A sending unit is configured to determine a motor control instruction based on a corresponding vibration reduction adjustment scheme if the matching in the matching unit is consistent, and send the motor control instruction to the controller.

[0015] In a third aspect, the present application provides a computing device comprising: at least one processor, and a memory, wherein the memory stores instructions executable by the processor, and the instructions are executed by the processor, so that the processor can execute the vibration reduction method of the vertical condensate pump as described above.

[0016] In a fourth aspect, the present application provides a readable storage medium for storing a computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the vibration reduction method of the vertical condensate pump as described above.

[0017] Compared with the prior art, the present application provides a vibration reduction method and device for a vertical condensate pump. This method avoids the problem of new resonance points caused by traditional fine dynamic balancing adjustments by obtaining the real-time speed of the vertical condensate pump and matching it with a preset information library. Specifically, the scheme uses the vibration reduction schemes at each target speed stored in the preset information library to directly and accurately adjust the resonance point. The vibration reduction scheme is a verified scheme that adjusts the amplitude corresponding to the resonance point to within the standard range, which can effectively avoid vibration mode disorder caused by the mechanical structure and multi-component coupling characteristics. In addition, the mechanism of real-time matching of speed and vibration reduction scheme can make the vibration reduction adjustment adapt to different operating conditions, suppress the resonance phenomenon from the root, rather than just superficially optimizing the unbalanced excitation force, significantly improving the stability and reliability of the vertical condensate pump operation, reducing the risk of system shutdown, and ensuring the continuity and safety of condensate transportation in the hot well of the condenser of the thermal power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 A flow chart schematically illustrates a method for reducing vibration of a vertical condensate pump;

[0020] Figure 2a A schematic diagram shows a front view of a vibration reduction device installed around a vertical condensate pump;

[0021] Figure 2b A schematic top view of a vibration reduction device installed around a vertical condensate pump is shown;

[0022] Figure 3 A flow chart schematically illustrates another method for reducing vibration of a vertical condensate pump;

[0023] Figure 4 The structure diagram of a vibration reduction device for a vertical condensate pump is schematically shown;

[0024] Figure 5 The schematic diagram of the structure of another type of vertical condensate pump vibration reduction device is shown schematically. DETAILED DESCRIPTION

[0025] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0026] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs.

[0027] As one of the three major water pumps in a thermal power unit, the variable frequency condensate pump undertakes the critical task of extracting condensate from the condenser hot well and transporting it to the deaerator. The vertical condensate pump consists of a vertical drive motor, motor support bolts, an upper support cylinder with an outlet, a lower support cylinder with an inlet, and a coupling connecting the upper and lower support cylinders. During the process of variable frequency operation of the vertical condensate pump according to operating conditions, the differences in the natural frequencies of its internal components and its asymmetric structural design cause multiple resonance points to occur at the same speed, causing resonance. This in turn leads to accelerated wear of its internal components, pipe ruptures, and even system shutdowns, among other safety accidents. To address this resonance problem, existing technologies generally use fine dynamic balancing methods to address it. This method primarily optimizes the mass balance of the rotating components in the vertical condensate pump, thereby reducing the unbalanced excitation force. However, due to the mechanical structure and multi-component coupling characteristics of the vertical condensate pump, this mass balancing optimization operation often causes changes in the vibration mode of the system, causing components that were originally in a non-resonant state to produce new resonance points due to changes in vibration characteristics caused by dynamic balancing adjustment, and cannot solve the resonance problem of the vertical condensate pump.

[0028] To this end, the inventors of the present application have proposed a vibration reduction method for a vertical condensate water pump, which obtains the real-time speed of the vertical condensate water pump; based on the matching of the real-time speed with the target speed in the preset information library, the preset information library stores a vibration reduction adjustment scheme for the vertical condensate water pump at the target speed, and the vibration reduction scheme is used to control the vibration reduction device to adjust the support strength of the screw supporting the vertical condensate water pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate water pump to the corresponding standard amplitude data range; if the match is consistent, the motor control instruction is determined based on the corresponding vibration reduction adjustment scheme, and the motor control instruction is sent to the controller to reduce the amplitude of the resonance point of the vertical condensate water pump at different speeds. A vibration reduction method for a vertical condensate water pump in an embodiment of the present application, the specific steps of which are as follows: Figure 1 As shown, including:

[0029] Step 101: Obtain the real-time rotation speed of the vertical condensate pump.

[0030] Before formally introducing this embodiment, this embodiment also introduces a vibration reduction device, such as Figure 2a and Figure 2b As shown, the vibration reduction device includes a motor, a controller, a fixed bracket and a screw. The fixed bracket is installed on the outside of the vertical drive motor and is used to fix the motor and one end of the screw. The screw is arranged opposite to each other along the top of the pump body, and the other end abuts the outer wall of the pump body. This arrangement enables the support force to be applied along the axis of the pump body, effectively offsetting lateral vibration. The real-time speed can be obtained through a speed sensor, such as a magnetoelectric or photoelectric sensor. The adjustment of the screw support force is achieved by driving the screw to extend and retract by a motor, for example, using a servo motor to control the screw displacement.

[0031] Among them, the fixing frame in the vibration reduction device can be a rectangular parallelepiped, a cube, or it can be a cylinder, a prism and other geometric shapes. The selection of its specific shape needs to comprehensively consider the overall dimensions, installation space limitations and mechanical performance requirements of the vertical condensate pump, and is not limited here. The material of the fixing frame is usually high-strength alloy steel. High-strength alloy steel has good rigidity and fatigue resistance, and is suitable for long-term stable operation under high-load and high-vibration environments. At the same time, in order to further improve the vibration reduction performance of the fixing frame, rubber vibration isolation pads or spring dampers can be added to the connection between it and the vertical drive motor and the screw. The buffering effect of the elastic element effectively blocks the transmission path of the vibration. The bottom end of the fixing bracket is fixed to the ground.

[0032] As the core control unit of the vibration reduction device, the controller generally adopts an industrial-grade PLC (programmable logic controller) or a high-performance embedded microcontroller. The PLC has mature and stable industrial control performance, supports multiple communication protocols, and can easily exchange data with the host computer, sensors and actuators; the embedded microcontroller has higher computing efficiency and flexibility, and can be optimized for specific vibration reduction algorithms to achieve fast and accurate control. In addition, the controller is also equipped with a variety of input and output interfaces, such as analog input interfaces for receiving signals from speed sensors and pressure sensors, and digital output interfaces for controlling actuators such as motor drivers and alarm devices to ensure that the entire vibration reduction system can operate stably and efficiently. The selection of the motor is also crucial. In addition to servo motors, stepper motors can also be used as an alternative to drive the lead screw. Stepper motors have the advantages of high control accuracy, fast response speed and relatively low cost. Through subdivided drive technology, precise control of the lead screw displacement can be achieved; servo motors have more advantages in dynamic performance, torque output capacity and closed-loop control accuracy, and are suitable for working conditions with extremely high requirements for vibration reduction response speed and control accuracy. It is worth noting that Figure 2a and Figure 2b The controller is not drawn in the figure because the position of the controller is not fixed, as long as it can control the motor.

[0033] In this embodiment, the number of lead screws in the vibration damping device is at least 2. The opposite arrangement refers to the arrangement in which the lead screws are symmetrically distributed along the top of the vertical condensate pump and the axes are opposite, that is, with the central axis of the pump body as the reference, they are evenly distributed along the circumferential direction. The number of its lead screws is an even number, which can be 4 or 6, but is not limited here. As a key component for transmitting supporting force, the lead screw often adopts a ball screw or a trapezoidal lead screw. The ball screw replaces sliding friction with rolling friction, and has the characteristics of high transmission efficiency, smooth movement, and high positioning accuracy; the trapezoidal lead screw has the advantages of simple structure, large load-bearing capacity, and good self-locking performance, and can be reasonably selected according to the actual load requirements and cost budget. Each lead screw has a corresponding motor. The contact side of the lead screw with the pump body can be concave, and the concavity can be adapted to the convexity of the pump body.

[0034] It is worth noting that the working principle of the vibration reduction device is as follows: Assuming that the vertical condensate pump resonates in the north-south direction at a speed of 18 Hz (natural frequency 18 Hz), the support force of the two electric screws in the north-south direction is adjusted, thereby changing the structural stiffness in the north-south direction, and then changing the natural frequency to deviate from 18 Hz, so that no resonance occurs in the north-south direction, thereby reducing the amplitude data. When the condensate pump continues to increase its speed to 19 Hz, resonance occurs in the east-west direction. At this time, the screws in the north-south direction stop working, and the screws in the east-west direction start working, changing the natural frequency in the east-west direction to deviate from 19 Hz, so that no resonance occurs in the east-west direction. If the condensate pump continues to increase its speed to 20 Hz, the amplitude data of the resonance point is within the corresponding standard amplitude data range, the screws in all directions do not work, and the condensate pump operates normally.

[0035] In this step, the real-time speed of the vertical condensate pump is continuously collected using a speed sensor during its operation. For example, real-time speed can be achieved by installing a Hall effect sensor or photoelectric encoder on the pump shaft or motor main shaft of the vertical condensate pump. The Hall effect sensor uses the principle of electromagnetic induction to generate a pulse signal when a magnetic element on the pump shaft passes by. The speed value (RPM) is converted by counting the number of pulses per unit time. A photoelectric encoder generates pulses by detecting the light-transmitting and light-blocking states of a rotating code disk, offering higher accuracy. To improve reliability, a redundant configuration can be implemented, with two independent sensors installed for cross-verification.

[0036] Step 102: Match the real-time rotation speed with the target rotation speed in a preset information library.

[0037] In this step, the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at a target speed. This vibration reduction scheme is used to control the vibration reduction device to adjust the support force of the screw supporting the vertical condensate pump at the target speed, thereby adjusting the amplitude data corresponding to the resonance point of the vertical condensate pump to within the corresponding standard amplitude data range. The preset information library is constructed through a stepped frequency sweep test and stores optimal support force parameters at different speeds. The target speed refers to the speed at which the amplitude data of the resonance point generated during the variable frequency operation of the vertical condensate pump does not meet the corresponding standard amplitude data. The preset information library is stored in a key-value pair structure, where the key is the target speed value and the value is the corresponding vibration reduction adjustment scheme. The standard amplitude data range refers to the resonance that does not affect the normal operation of the vertical condensate pump during operation. In other words, the amplitude data within the standard amplitude data range is acceptable amplitude data.

[0038] The vibration reduction adjustment scheme in the preset information library of this step is a scheme for reducing the amplitude data of the resonance point at the operating frequency of the vertical condensate pump using a vibration reduction device. This vibration reduction scheme is obtained through training using the vibration reduction device.

[0039] In this step, when the real-time speed and the target speed are matched, it can be determined that the two are matched when the real-time speed is consistent with the target speed. A tolerance comparison algorithm can be used to determine whether there is a preset precision difference between the real-time speed and the target speed. For example, a preset precision difference (allowable speed deviation range) is set (such as ±5RPM). When the real-time speed falls within the tolerance interval of a certain target speed, it is determined that the match is successful. For example, if the real-time speed is 1498RPM, and there is a target speed of 1500RPM in the preset library, the vibration reduction scheme corresponding to the target speed is triggered.

[0040] Step 103: If the match is consistent, determine the motor control instruction based on the corresponding vibration reduction adjustment scheme, and send the motor control instruction to the controller.

[0041] If the real-time speed matches the target speed in step 102, a motor control command is determined based on the corresponding vibration reduction adjustment scheme and sent to the controller so that the amplitude data of the vertical condensate pump at the resonance point at the target speed is within the corresponding standard amplitude data range. If the amplitude data does not match, it indicates that the amplitude data of the vertical condensate pump at the resonance point at the real-time speed meets the corresponding standard amplitude data range.

[0042] The present application provides a vibration reduction method and device for a vertical condensate pump. This method avoids the problem of new resonance points caused by traditional fine dynamic balancing adjustments by obtaining the real-time speed of the vertical condensate pump and matching it with a preset information library. Specifically, the scheme uses the vibration reduction schemes at each target speed stored in the preset information library to directly and accurately adjust the resonance point. The vibration reduction scheme is a verified scheme that adjusts the amplitude corresponding to the resonance point to within the standard range, which can effectively avoid the vibration mode disorder caused by the mechanical structure and the coupling characteristics of multiple components. In addition, the mechanism of real-time matching of the speed and the vibration reduction scheme can make the vibration reduction adjustment adapt to different operating conditions, suppress the resonance phenomenon from the root, rather than just superficially optimizing the unbalanced excitation force, significantly improving the stability and reliability of the vertical condensate pump operation, reducing the risk of system shutdown, and ensuring the continuity and safety of the condensate transportation of the hot well of the condenser of the thermal power unit.

[0043] In order to explain the above embodiment in more detail, the present application also provides another vibration reduction method for a vertical condensate pump, such as Figure 3 As shown, the embodiment of the present application provides the following specific steps:

[0044] Step 301: Obtain the real-time rotation speed of the vertical condensate pump.

[0045] In this step, the real-time speed of the vertical condensate pump is continuously collected using a speed sensor during its operation. For example, real-time speed can be achieved by installing a Hall effect sensor or photoelectric encoder on the pump shaft or motor main shaft of the vertical condensate pump. The Hall effect sensor uses the principle of electromagnetic induction to generate a pulse signal when a magnetic element on the pump shaft passes by. The speed value (RPM) is converted by counting the number of pulses per unit time. A photoelectric encoder generates pulses by detecting the light-transmitting and light-blocking states of a rotating code disk, offering higher accuracy. To improve reliability, a redundant configuration can be implemented, with two independent sensors installed for cross-verification.

[0046] Step 302: Build a preset information library.

[0047] In this embodiment, the preset information library is obtained through training based on vertical condensate pumps and vibration reduction devices. The specific acquisition method is as follows:

[0048] A step-by-step frequency sweep test collects vibration spectrum data of a vertical condensate pump at different speeds. Based on the peak values ​​in the vibration spectrum data, the resonance point and corresponding amplitude data are determined. A vibration reduction device is used to adjust the amplitude data corresponding to the resonance point at any speed to within the corresponding standard vibration data range to obtain a vibration reduction solution. The step-by-step frequency sweep test divides the speed range of the vertical condensate pump into multiple continuous subranges and gradually increases the speed in fixed steps within each subrange while simultaneously collecting vibration signals. Specifically, a frequency converter is used to control the motor driving the pump, and an acceleration sensor is used to record vibration spectrum data in real time, thereby covering the dynamic response characteristics at different speeds. Vibration spectrum data refers to the frequency domain signal collected by the sensor that reflects the vibration energy distribution of the vertical condensate pump. Specifically, a fast Fourier transform is used to convert the time-domain vibration signal into frequency domain data. Resonance points are identified by analyzing the peak frequencies and amplitudes in the spectrum. Resonance points are frequency points in the vibration spectrum where the amplitude exceeds a threshold. These points correspond to resonance caused by the coupling of the natural frequencies of the internal components of the vertical condensate pump with the external excitation frequency. Specifically, the primary resonant frequencies can be screened by setting an amplitude threshold or using a peak-to-valley difference method. Specifically, when constructing a preset information library, a stepped frequency sweep test is first performed to obtain vibration spectrum data at different speeds. Spectral analysis is then used to determine the resonant frequencies and their corresponding amplitudes. Subsequently, for each resonance point at each speed, the support strength of the vibration reduction device is adjusted to gradually reduce the resonance amplitude until it meets the standard range. The motor control parameters during the adjustment process are recorded as a vibration reduction solution. For example, at a certain speed, two resonance peaks are identified. By adjusting the support force of the lead screw on the outer wall of the water pump, the amplitudes of the primary and secondary resonance points are weakened, respectively, ultimately forming a complete vibration reduction strategy for that speed. Compared with existing technologies, existing fine dynamic balancing methods only perform mass balancing on rotating components, failing to address the problem of coupled vibrations among multiple components, and the adjustment process may also induce new resonance points. This solution, however, comprehensively identifies multiple resonance points through dynamic frequency sweep testing and, based on the real-time adjustment of the support stiffness of the vibration reduction device, directly compensates for the resonance amplitude, avoiding the problem of vibration modal shifts caused by changes in structural parameters. During a stepped frequency sweep test, the test can start at the minimum operating speed of the vertical condensate pump and continue up to the maximum operating speed, with each test speed interval (preset step size) being 1 rpm. For example, tests can be conducted at 300 rpm, 301 rpm, and 302 rpm to determine the vibration reduction solution.

[0049] The stepped frequency sweep test involves dividing the speed range of the vertical condensate pump into multiple continuous speed steps; within any speed step, performing incremental variable frequency drive according to a preset speed step size, and simultaneously collecting vibration spectrum data at different speeds within any speed step size. Specifically, the speed step size refers to dividing the speed range of the vertical condensate pump into several continuous, non-overlapping intervals. This can be achieved by equal or unequal division, for example, dividing the speed range into steps of 50 rpm each. This division method can refine the test range and avoid missing key resonance points due to large speed spans. The preset speed step size refers to the incremental value of each speed adjustment within a single speed step size. It can be achieved by a fixed step size or a dynamically adjusted step size, for example, set to 5 rpm. This step size setting ensures that the speed is increased in small intervals within the step size, thereby accurately capturing changes in the vibration spectrum. Incremental variable frequency drive gradually increases the speed of a vertical condensate pump by controlling the motor frequency. This is achieved by using a frequency converter to control the motor's output frequency. This drive method is synchronized with vibration spectrum data collection to ensure complete vibration data recording at every speed point.

[0050] Specifically, during the stepped frequency sweep test, the vertical condensate pump's speed range is first divided into multiple continuous steps, for example, from 0 to 3000 rpm, divided into multiple 50 rpm intervals. Within a single step, for example, from 1000 to 1050 rpm, the speed is gradually increased in preset steps of 5 rpm. Each time the speed is adjusted, vibration spectrum data at that speed is immediately collected, for example, by measuring the vibration amplitude and frequency distribution using an accelerometer. This stepped test allows for intensive sampling within each small range, avoiding data loss or test blind spots caused by rapid speed changes. Compared to existing methods, which typically employ continuous frequency conversion or large-scale jump testing, key resonance points can be missed due to uneven speed change rates. This approach, by using stepped division and step-size control, ensures that speed adjustment and data acquisition are strictly aligned, ensuring the integrity and continuity of vibration spectrum data and providing a precise data foundation for subsequent vibration reduction solutions. Through the above technical solution, this application can systematically cover the entire speed range of vertical condensate pumps, accurately identifying resonance points and amplitude data within different steps. This testing method solves the problem of missing resonance points due to the coarse testing range in existing technologies, providing reliable spectrum data support for vibration reduction device adjustment, thereby reducing the risk of equipment damage caused by resonance.

[0051] When obtaining a vibration reduction scheme at a certain speed, the resonance point at the speed and the amplitude data corresponding to the resonance point can be obtained first to determine the main resonance point and the secondary resonance point, wherein the main resonance point represents the resonance point corresponding to the maximum amplitude data in the resonance point that does not meet the corresponding standard amplitude data range, and the secondary resonance point represents the resonance point where the amplitude data in the resonance point is not within the corresponding standard amplitude data range and is lower than the amplitude data of the main resonance point; after determining the vibration reduction scheme for the main resonance point, the vibration reduction scheme for the secondary resonance point is determined; the vibration reduction scheme for the main resonance point and the vibration reduction scheme for the secondary resonance point are determined as the vibration reduction scheme. Wherein, the vibration reduction scheme for the main resonance point can be determined by adjusting the support force of the lead screw at different positions using a vibration reduction device after determining the main resonance point, and monitoring the amplitude data of the main resonance point in real time to determine whether the amplitude data is within the corresponding standard amplitude data range. If so, the vibration reduction scheme for the main resonance point is determined based on the support force of different lead screws in the vibration reduction device. The vibration reduction scheme for the secondary resonance point is obtained in the same way as the vibration reduction scheme for the main resonance point, and again no excessive restrictions are imposed. Of course, the vibration reduction plan can also be obtained at one time. If the vibration reduction plan is to be obtained at one time, the amplitude data of the resonance point can be monitored directly by adjusting the screw support strength of the vibration reduction device. If the amplitude data is within the corresponding standard amplitude data range, the vibration reduction plan is determined according to the output of the screw in the vibration reduction device.

[0052] Before the amplitude data corresponding to the resonance point of the vertical condensate pump at any speed is adjusted to be within the corresponding standard amplitude data range, the method includes: obtaining the type of the vertical condensate pump and the operating area of ​​the vertical condensate pump; determining a vibration reduction device and an installation method of the vibration reduction device based on the operating area and the type of the vertical condensate pump; and installing the vibration reduction device for the vertical condensate pump based on the installation method of the vibration reduction device. Specifically, the size of the vertical condensate pump is determined based on the model of the vertical condensate pump to determine the type of the vertical condensate pump. The operating area of ​​the vertical condensate pump can be measured on site. Based on the operating area and the type of the vertical condensate pump, the vibration reduction device and the installation method of the vibration reduction device are determined, and the vibration reduction device is installed for the vertical condensate pump.

[0053] It is worth noting that, in this embodiment, the vibration reduction scheme can also be obtained by: establishing a digital twin model based on the historical operating data and structural parameters of the vertical condensate pump; constructing a virtual model in the digital twin model that is highly matched with the actual vibration reduction device based on the installation position, installation method and structural parameters of the vibration reduction device in the vertical condensate pump; using the digital twin model to simulate the operating conditions of the vertical condensate pump at different speeds; and using the virtual model to adjust the amplitude data of the resonance point at different speeds to obtain the vibration reduction scheme.

[0054] Specifically, first, it is necessary to comprehensively collect historical operating data of the vertical condensate pump, including real-time speed, amplitude data, temperature, pressure, and other monitoring data, as well as operation log information such as equipment start-up and shutdown times and fault records. At the same time, the structural parameters of the equipment, such as the pump material properties (elastic modulus, Poisson's ratio), geometric dimensions (impeller diameter, shaft length), bearing model, and installation location, must be accurately obtained. Using this data, a three-dimensional finite element digital twin model of the vertical condensate pump is constructed using professional simulation software such as ANSYS and COMSOL. By assigning material properties, setting boundary conditions, and meshing, the model is ensured to accurately reflect the physical properties of the actual equipment. Secondly, based on the technical parameters of the motor, controller, fixed bracket, and screw in the vibration reduction device, a virtual vibration reduction device is constructed in the digital twin model. Specifically, the motor requires definition of dynamic parameters such as the torque-speed curve and moment of inertia; the screw requires transmission characteristics such as pitch, lead, and friction coefficient; and the fixed bracket requires clear mechanical properties such as material strength and structural stiffness. At the same time, based on the actual installation location (outside the vertical drive motor) and installation method (bolt fixing, welding, etc.), a virtual vibration damping device is precisely deployed in the model to ensure that its positional relationship and connection method are completely consistent with the actual physical structure. Reasonable constraints are set to realistically simulate the support effect of the vibration damping device on the pump body. Secondly, the digital twin model is used to simulate the operating state of the vertical condensate pump at different speeds (covering operating conditions such as startup, normal operation, and critical speed). By simulating the operating state of the actual vertical condensate pump, the vibration characteristics of the pump body under various operating conditions (including data such as the frequency and amplitude distribution of the resonance point) and the analysis results of the operating state are obtained. Finally, based on the above simulation analysis results, the parameters of the vibration damping device are adjusted in the virtual model, such as changing the support strength of different screws. By setting multiple sets of parameters and conducting repeated simulation experiments, the optimal parameter combination is obtained to minimize the amplitude data of the resonance point and reduce the vibration energy as the optimization goal, thereby determining the best vibration damping solution at different speeds. This digital twin-driven vibration reduction solution acquisition method enables efficient verification and optimization of vibration reduction strategies in a virtual environment, avoiding extensive field testing and significantly improving the scientific nature and effectiveness of vibration reduction solutions.

[0055] Step 303 : Based on the matching between the real-time rotation speed and the target rotation speed in the preset information library, if the matching is consistent, a motor control instruction is determined based on the corresponding vibration reduction adjustment scheme, and the motor control instruction is sent to the controller.

[0056] When the real-time speed matches the target speed, a motor control command is determined based on the corresponding vibration reduction adjustment scheme and sent to the controller so that the amplitude data of the vertical condensate pump at the resonance point at the target speed is within the corresponding standard amplitude data range. If the real-time speed does not match, it indicates that the amplitude data of the vertical condensate pump at the resonance point at the real-time speed meets the corresponding standard amplitude data range.

[0057] Furthermore, after determining a motor control command based on the corresponding vibration reduction adjustment scheme and sending the command to the controller, the vibration amplitude data of the vertical condensate pump at the target speed is acquired in real time. A determination is made as to whether the amplitude data at the resonance point is within a corresponding standard amplitude data range. If so, the vibration reduction operation is determined to be complete. Specifically, the method for acquiring the amplitude data at the resonance point of the vertical condensate pump at the target speed can include installing an acceleration sensor perpendicular to the axial bearing seat of the vertical condensate pump, securing it to a measuring point in the middle of the pump body via a magnetic base, connecting it to a data acquisition instrument, and setting a sampling rate of 2048 Hz. After starting the inverter to drive the motor to the target speed, the data acquisition instrument captures the vibration time domain signal in real time and extracts the amplitude at the resonance frequency point through an FFT transform. Determining whether the amplitude data at the resonance point is within the corresponding standard amplitude data range can be accomplished by transmitting the data to a DCS control system via a 4-20 mA analog signal, plotting a real-time vibration curve on the HMI interface, and noting the standard amplitude data range. The vibration reduction operation is determined to be complete when the amplitude at the resonance frequency point is within the corresponding standard amplitude data range.

[0058] It is worth noting that after adjusting the resonance point of the vertical condensate pump at the target speed based on the vibration reduction scheme to ensure that the amplitude data meets the standard, this embodiment stores the time and value of the real-time speed of the vertical condensate pump, continuously obtains the real-time speed of the vertical condensate pump, and continuously controls the amplitude of the resonance point of the vertical condensate pump. The specific operation is as follows: obtaining the speed of the vertical condensate pump at the previous moment and the speed of the current vertical pump; determining whether the speed of the vertical condensate pump at the previous moment is the same as the speed of the current vertical pump; if so, executing the vibration reduction scheme based on matching the speed with the target speed in the preset information library; if not, executing the vibration reduction scheme for the vertical condensate pump at the previous moment. If the speed of the vertical condensate pump at the previous moment is different from the speed of the current vertical pump, sending a motor control command to the controller, restoring the control screw to its initial state, and continuing the step of matching the current speed of the vertical pump with the preset information library.

[0059] Furthermore, as a response to the above Figure 1 、 Figure 3 The embodiment of the present application provides a vibration reduction device for a vertical condensate pump to realize the method shown. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will no longer describe the details of the aforementioned method embodiment one by one, but it should be clear that the device in this embodiment can correspond to all the contents of the aforementioned method embodiment. Figure 4As shown, the device is applied to a vibration reduction device, which includes: a motor, a controller, a fixing bracket, and a screw. The fixing bracket is installed on the outside of the vertical drive motor of the vertical condensate pump and is used to fix the motor and one end of the screw. The screw is arranged opposite to each other along the top of the vertical condensate pump, and the other end of the screw abuts against the outer wall of the vertical condensate pump. The device includes:

[0060] An acquisition unit 41 is used to acquire the real-time rotation speed of the vertical condensate pump;

[0061] a matching unit 42 for matching the real-time speed obtained by the obtaining unit 41 with a target speed in a preset information library, wherein the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at the target speed, wherein the vibration reduction scheme is used to control the vibration reduction device to adjust the support force of the lead screw supporting the vertical condensate pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate pump to within the corresponding standard amplitude data range;

[0062] The sending unit 43 is configured to determine a motor control instruction based on the corresponding vibration reduction adjustment scheme if the matching is consistent in the matching unit 42, and send the motor control instruction to the controller.

[0063] Furthermore, the apparatus includes a construction unit 44, and the construction unit 44 includes construction of a preset information library, specifically including:

[0064] The frequency sweep module 441 is used to collect vibration spectrum data of the vertical condensate pump at different speeds based on a step-by-step frequency sweep test;

[0065] A vibration point determination module 442 is configured to determine a resonance point and corresponding amplitude data based on a peak value in the vibration spectrum data in the frequency sweep module 441;

[0066] The solution acquisition module 443 is used to use the vibration reduction device to adjust the amplitude data corresponding to the resonance point in the vibration point determination module 442 at any speed to be within the corresponding standard vibration data range, so as to obtain a vibration reduction solution.

[0067] Further, such as Figure 5 As shown, the frequency scanning module 441 includes:

[0068] A division submodule 4411 is used to divide the speed range of the vertical condensate pump into a plurality of continuous speed step segments;

[0069] The acquisition submodule 4412 is used to perform incremental variable frequency drive according to a preset speed step in any speed step in the division submodule 4411, and synchronously acquire vibration spectrum data at different speeds in any speed step.

[0070] Further, such as Figure 5As shown, the acquisition solution module 443 includes:

[0071] Amplitude acquisition submodule 4431 is used to obtain the resonance point and corresponding amplitude data at any speed;

[0072] a vibration reduction determination submodule 4432 configured to determine a primary resonance point and a secondary resonance point based on the resonance point and the amplitude data corresponding to the resonance point in the amplitude acquisition submodule 4431;

[0073] The vibration reduction determination submodule 4432 is configured to determine a vibration reduction scheme for a secondary resonance point after determining a vibration reduction scheme for a primary resonance point;

[0074] The vibration reduction determination submodule 4432 is configured to determine the vibration reduction scheme for the primary resonance point and the vibration reduction scheme for the secondary resonance point as a vibration reduction scheme.

[0075] Further, such as Figure 5 As shown, the acquisition unit 41 of the device further includes:

[0076] An area acquisition module 411 is used to acquire the type of the vertical condensate pump and the operating area of ​​the vertical condensate pump;

[0077] The region acquisition module 411 is configured to determine a vibration reduction device and an installation method thereof based on the operation region and the type of the vertical condensate pump;

[0078] The installation module 412 is used to install the vibration reduction device for the vertical condensate pump based on the installation method of the vibration reduction device.

[0079] Further, such as Figure 5 As shown, the device further includes a testing unit 45, and the testing unit 45 includes:

[0080] The data acquisition module 451 is used to obtain the amplitude data of the resonance point of the vertical condensate pump at the target speed;

[0081] A judging module 452 is configured to judge whether the amplitude data of the resonance point in the data acquisition module 451 is within a corresponding standard amplitude data range;

[0082] The judgment module 452 is configured to determine that the vibration reduction operation is completed if yes.

[0083] Further, such as Figure 5 As shown, the construction unit 44 further includes:

[0084] Establishing a vibration reduction model module 444 for establishing a digital twin model based on historical operating data and structural parameters of the vertical condensate pump;

[0085] The vibration reduction model establishment module 444 is used to construct a virtual model that is highly matched with the actual vibration reduction device in the digital twin model based on the installation position, installation method and structural parameters of the vibration reduction device on the vertical condensate pump;

[0086] Utilizing a model module 445 for simulating operating conditions of a vertical condensate pump at different speeds using the digital twin model;

[0087] The model module 445 uses the virtual model to adjust the amplitude data of the resonance point at different speeds to obtain a vibration reduction solution.

[0088] Further, such as Figure 5 As shown, after adjusting the resonance point of the vertical condensate pump at the target speed based on the vibration reduction scheme so that the amplitude data meets the standard, the device sending unit 43 further includes:

[0089] The speed acquisition module 431 is used to obtain the speed of the vertical condensate pump at the previous moment and the speed of the current vertical water pump;

[0090] A speed determination module 432 is configured to determine whether the speed of the vertical condensate pump at the previous moment in the speed acquisition module 431 is the same as the current speed of the vertical water pump;

[0091] The speed determination module 432 is configured to perform matching based on the speed and the target speed in the preset information library;

[0092] The speed determination module 432 is configured to execute the vibration reduction plan of the vertical condensate pump at the previous moment if no.

[0093] Furthermore, an embodiment of the present application provides a computing device, which includes: at least one processor, and a memory, wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor, so that the processor can execute the above-mentioned vibration reduction method of the vertical condensate pump.

[0094] Furthermore, an embodiment of the present application provides a readable storage medium for storing a computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the above-mentioned vibration reduction method for the vertical condensate pump.

[0095] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] It is understood that the relevant features of the above methods and devices can be referenced to each other. In addition, the terms "first" and "second" in the above embodiments are used to distinguish between the embodiments, and do not represent the advantages and disadvantages of the embodiments.

[0097] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0098] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general-purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing this type of system. In addition, the present invention is not directed to any specific programming language. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the above description of specific languages ​​is for the purpose of disclosing the best mode of the present invention.

[0099] In addition, the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0100] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0101] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0102] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0103] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0104] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0105] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0106] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0107] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0108] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A vibration reduction method for a vertical condensate pump, characterized in that: The method is applied to a vibration reduction device, which includes: a motor, a controller, a fixing bracket, and a screw. The fixing bracket is installed outside the vertical drive motor of a vertical condensate pump and is used to fix the motor and one end of the screw. The screw is arranged opposite to each other along the top of the vertical condensate pump, and the other end of the screw abuts against the outer wall of the vertical condensate pump. The method includes: Get the real-time speed of the vertical condensate pump; Based on the matching of the real-time speed with the target speed in the preset information library, the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at the target speed, and the vibration reduction scheme is used to control the vibration reduction device to adjust the support force of the lead screw supporting the vertical condensate pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate pump to within the corresponding standard amplitude data range; If the match is consistent, a motor control instruction is determined based on the corresponding vibration reduction adjustment scheme, and the motor control instruction is sent to the controller.

2. The method according to claim 1, characterized in that The steps of constructing the preset information library include: The vibration spectrum data of the vertical condensate pump at different speeds is collected based on the stepped frequency sweep test; Determining a resonance point and corresponding amplitude data based on a peak value in the vibration spectrum data; The vibration reduction device is used to adjust the amplitude data corresponding to the resonance point at any speed to be within the corresponding standard vibration data range to obtain a vibration reduction solution.

3. The method according to claim 2, characterized in that The steps of the step-by-step frequency sweep test include: Divide the speed range of the vertical condensate pump into multiple continuous speed steps; In any speed step, incremental variable frequency drive is performed according to the preset speed step, and vibration spectrum data at different speeds in any speed step is synchronously collected.

4. The method according to claim 2, characterized in that The method of using the vibration reduction device to adjust the amplitude data corresponding to the resonance point at any speed to be within the corresponding standard vibration data range to obtain a vibration reduction solution includes: Obtain the resonance point and corresponding amplitude data at any speed; Determine the primary resonance point and the secondary resonance point based on the resonance point and the amplitude data corresponding to the resonance point; After determining the vibration reduction scheme for the main resonance point, determine the vibration reduction scheme for the secondary resonance point; The vibration reduction scheme for the main resonance point and the vibration reduction scheme for the secondary resonance point are determined as the vibration reduction scheme.

5. The method according to claim 4, characterized in that Before adjusting the amplitude data corresponding to the resonance point of the vertical condensate pump at any speed to be within the corresponding standard amplitude data range, the method includes: Obtaining the type of a vertical condensate pump and an operating area of ​​the vertical condensate pump; Determining a vibration reduction device and an installation method of the vibration reduction device based on the operating area and the type of the vertical condensate pump; Based on the installation method of the vibration reduction device, a vibration reduction device is installed for the vertical condensate pump.

6. The method according to claim 1, characterized in that The method comprises: A digital twin model was established based on the historical operating data and structural parameters of the vertical condensate pump; Based on the installation position, installation method, and structural parameters of the vibration damping device on the vertical condensate pump, a virtual model that closely matches the actual vibration damping device is constructed in the digital twin model; Using the digital twin model to simulate the operating conditions of a vertical condensate pump at different speeds; The virtual model is used to adjust the amplitude data of the resonance point at different rotation speeds to obtain a vibration reduction solution.

7. The method according to claim 1, characterized in that After adjusting the resonance point of the vertical condensate pump at the target speed based on the vibration reduction scheme so that the amplitude data meets the standard, the method further includes: Get the speed of the vertical condensate pump at the previous moment and the speed of the current vertical water pump; Determine whether the speed of the vertical condensate pump at the previous moment is the same as the speed of the current vertical water pump; If so, performing matching based on the rotation speed and the target rotation speed in the preset information library; If not, the vibration reduction plan for the vertical condensate pump at the previous moment will be executed.

8. A vibration reduction device for a vertical condensate pump, characterized in that: include: The device is applied to a vibration reduction device, which includes: a motor, a controller, a fixing bracket, and a lead screw. The fixing bracket is installed on the outside of the vertical drive motor of the vertical condensate water pump and is used to fix the motor and one end of the lead screw. The lead screw is arranged opposite to each other along the top of the vertical condensate water pump, and the other end of the lead screw abuts against the outer wall of the vertical condensate water pump. The device includes: An acquisition unit, used to acquire the real-time speed of the vertical condensate pump; a matching unit, configured to match the real-time speed in the acquisition unit with a target speed in a preset information library, wherein the preset information library stores a vibration reduction adjustment scheme for the vertical condensate pump at the target speed, the vibration reduction scheme being configured to control the vibration reduction device to adjust the support force of the lead screw supporting the vertical condensate pump at the target speed, so as to adjust the amplitude data corresponding to the resonance point of the vertical condensate pump to within a corresponding standard amplitude data range; A sending unit is configured to determine a motor control instruction based on a corresponding vibration reduction adjustment scheme if the matching in the matching unit is consistent, and send the motor control instruction to the controller.

9. A computing device, characterized in that The computing device includes: at least one processor, and a memory, wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor, so that the processor can perform the vibration reduction method of the vertical condensate pump according to any one of claims 1-7.

10. A readable storage medium, characterized in that: The readable storage medium is used to store a computer program, wherein when the computer program is run, the device where the storage medium is located is controlled to execute the vibration reduction method for the vertical condensate pump according to any one of claims 1 to 7.

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