Circulation flow optimization control method and device based on industrial cold water equipment

Abstract

The invention discloses a circulating flow optimization control method and device based on industrial water cooling equipment, and relates to the technical field of flow control. Comprising the following steps that impeller wear data are obtained, the wear data comprise flow data, vibration data and impeller damage data, and an impeller wear evaluation value is obtained through evaluation according to the wear data; a wear threshold value is set, impeller wear judgment is conducted according to the impeller wear evaluation value and the wear threshold value, and an impeller wear judgment result is obtained; if the impeller abrasion judgment result is that the current impeller is abraded, operation data are obtained, and the impeller abrasion evaluation value and the operation data are comprehensively analyzed to obtain an actual adjustment value; setting a rotating speed threshold value, and performing flow control according to the actual adjustment value and the rotating speed threshold value. The problem that in the prior art, it is difficult to timely and accurately compensate for the flow change according to the abrasion degree of the impeller is solved, and the effect that when the impeller is abraded, the flow change can be timely and effectively compensated for is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of flow control, and in particular to a circulation flow optimization control method and device based on industrial chiller equipment. Background Art

[0002] Industrial chillers are devices that are specifically used to provide low-temperature cooling water. Their core function is to absorb and transfer heat from process equipment or the environment through a refrigeration system, thereby achieving cooling of the target object. In the industrial production process, many equipment and processes will generate a large amount of heat. If they are not cooled in a timely and effective manner, they may cause problems such as equipment overheating and damage, reduced production efficiency, and unstable product quality. Industrial chillers take away this heat by circulating cooling water, maintaining the equipment and process operating within a suitable temperature range, and ensuring the continuity and stability of production.

[0003] For example, a Chinese patent with publication number CN117433594B, a differential pressure gas flow measurement device, includes an air inlet, a differential pressure measuring part and an air outlet connected in sequence; the air inlet and the air outlet are connected to the measuring air paths on both sides; the differential pressure measuring part includes a first measuring air channel, a differential pressure hole, a conical hole and a second measuring air channel connected in sequence; the present invention also provides a method for optimizing the taper angle of a conical hole for the problem of pipeline pressure loss and turbulence intensity, by exploring the relationship between pressure loss and taper angle, and the turbulence intensity at the second differential pressure measurement point under different taper angles, finally obtaining a gas flow measurement device with stable pressure differential measurement and controllable pipeline pressure loss, and combining pressure compensation with the pipeline absolute pressure obtained at the back end, to obtain accurate pipeline gas flow.

[0004] For example, a Chinese patent with publication number CN113447087B is a flow measurement method based on dynamic optimization of three pressure sensors. This method uses pressure sensors installed at fixed positions at both ends of a test straight pipe and a pressure sensor at a middle position to measure the real-time fluid pressure at the installation point respectively. Then, a flow solver estimator is used to estimate the real-time dynamic flow of the fluid in the pipeline in real time. It has fast response speed, high measurement accuracy, can effectively eliminate noise interference such as vibration in the environment, and has strong anti-interference ability.

[0005] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, it was found that the above technology has at least the following technical problems: during the circulation operation of the cold water equipment, the water pump impeller will cause wear due to long-term use. After the impeller is worn, the blades will become thinner or deformed, and the pushing area for the fluid will become smaller, causing the water pump flow rate to decrease, unable to meet the system requirements, and affecting the flow control accuracy of the cold water equipment. Summary of the invention

[0006] Technical issues solved In view of the shortcomings of the prior art, the present invention provides a circulation flow optimization control method and device based on industrial chilled water equipment, which solves the problem in the prior art that it is difficult to compensate for flow changes in a timely and accurate manner according to the degree of impeller wear, and achieves the effect of being able to compensate for flow changes in a timely and effective manner when impeller wear problems occur.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a circulation flow optimization control method based on industrial chilled water equipment, comprising the following steps: step one, obtaining wear data at the impeller, the wear data including flow data, vibration data and impeller damage data, and obtaining an impeller wear assessment value based on the wear data; step two, setting a wear threshold, and judging the impeller wear based on the impeller wear assessment value and the wear threshold, to obtain an impeller wear judgment result; step three, if the impeller wear judgment result is that the current impeller is worn, obtaining the operating data, and comprehensively analyzing the impeller wear assessment value and the operating data to obtain an actual adjustment value; step four, setting a speed threshold, and performing flow control based on the actual adjustment value and the speed threshold.

[0009] Furthermore, the steps for obtaining the impeller wear assessment value are as follows: comprehensively analyze the flow data to obtain the flow assessment value; comprehensively analyze the vibration data to obtain the vibration assessment value; comprehensively analyze the impeller damage data to obtain the operation impact value; normalize the flow impact value, the vibration assessment value and the operation assessment value, and comprehensively analyze the flow impact value, the vibration assessment value and the operation assessment value to obtain the impeller wear assessment value.

[0010] Furthermore, the steps for obtaining the flow evaluation value are as follows: preset a collection time period, and set the number of collection times based on the preset collection time period; based on the number of collections, collect the cold water flow at the impeller and the cold water flow at the pipeline; calculate the difference between the cold water flow at the impeller and the cold water flow at the pipeline to obtain the flow difference; based on the number of collections, calculate the mean of the flow difference to obtain the mean of the flow difference; comprehensively analyze the number of collections, the mean of the flow difference and the flow difference to obtain the flow fluctuation evaluation value, and normalize the flow fluctuation evaluation value to obtain the flow evaluation value.

[0011] Furthermore, the flow fluctuation evaluation value is obtained as follows: ; In the formula, represents the flow fluctuation assessment value, Indicates the number of collections. Indicates The flow difference of the collected Indicates the mean flow difference.

[0012] Furthermore, the steps for obtaining the vibration evaluation value are as follows: based on the number of collection times within a preset time period, the vibration frequency, vibration amplitude and vibration phase difference are collected, and the vibration frequency, vibration amplitude and vibration phase difference are normalized; the normalized vibration frequency, vibration amplitude and vibration phase difference are comprehensively calculated to obtain the vibration evaluation value.

[0013] Furthermore, the steps for obtaining the operation impact value are as follows: based on the set number of collection times, water quality information is collected; the water quality information includes: water quality particle concentration and water quality pH; the total operation time of the water pump is obtained, the water quality information collected each time is summed up, and the summed water quality information is normalized, and the normalized water quality information, the total operation time of the water pump and the number of collection times are comprehensively calculated to obtain the operation impact value.

[0014] Furthermore, the specific steps for obtaining the impeller wear judgment result are as follows: set a first wear threshold and a second wear threshold, and compare the impeller wear assessment value with the first wear threshold and the second wear threshold in real time; if the impeller wear assessment value is less than the first wear threshold, the impeller is judged to be normal; if the impeller wear assessment value is greater than or equal to the first wear threshold and less than the second wear threshold, it is judged that the current impeller is worn; if the impeller wear assessment value is greater than or equal to the second flow threshold, it is judged that the current impeller is severely worn, and the valve and water pump are closed.

[0015] Furthermore, the steps for obtaining the actual adjustment value are as follows: the operating data includes: the current flow rate of the water pump and the current speed of the water pump; the current speed of the water pump, the current flow rate of the water pump and the impeller wear assessment value are comprehensively calculated to obtain the speed adjustment value, and the speed adjustment value is added to the current speed of the water pump to obtain the actual adjustment value.

[0016] Furthermore, the specific steps for performing flow control according to the actual adjustment value and the speed threshold are as follows: setting the speed threshold, and comparing the actual adjustment value with the speed threshold in real time; if the actual adjustment value is greater than or equal to the speed threshold, the current speed of the water pump will be adjusted to the actual adjustment value, and the current speed and adjustment information will be sent to the staff; if the actual adjustment value is less than the speed threshold, the current water pump speed will be adjusted to the speed threshold, and the current speed and adjustment information will be sent to the staff, and an alarm will be issued at the same time.

[0017] A circulation flow optimization control device based on industrial chiller equipment, the device comprising: A wear degree assessment module is used to obtain wear data at the impeller, the wear data includes flow data, vibration data and impeller damage data, obtain an impeller wear assessment value based on the wear data, and transmit the impeller wear assessment value to the wear degree judgment module; A wear degree judgment module is used to set a wear threshold, judge the impeller wear according to the impeller wear assessment value and the wear threshold, obtain the impeller wear judgment result, and transmit the impeller wear judgment result to the flow optimization and regulation module; The flow optimization and adjustment module is used to receive the impeller wear judgment result. If the impeller wear judgment result is that the current impeller is worn, the operation data is obtained, and the impeller wear assessment value and the operation data are comprehensively analyzed to obtain the actual adjustment value, and the actual adjustment value is transmitted to the flow control optimization module; The flow control optimization module is used to receive the actual adjustment value, set the speed threshold, and perform flow control according to the actual adjustment value and the speed threshold.

[0018] Beneficial Effects

[0019] The present invention has the following beneficial effects: (1) The circulation flow optimization control method and device based on industrial chilled water equipment can accurately grasp the wear condition of the impeller by obtaining the impeller wear evaluation value, and can optimize the flow control in a targeted manner. When the impeller wear is light, the existing flow control strategy is maintained to ensure the efficient operation of the water pump. If the wear is heavy, the speed adjustment value is calculated according to the evaluation value and the current flow, speed and other data of the water pump according to the proportional law, and the speed is adjusted reasonably to reduce leakage, hydraulic loss and vibration caused by wear, so as to ensure that the flow meets the demand and avoid the equipment from running in an abnormal state, realize the optimization control of the flow, and improve the stability and efficiency of the water pump operation.

[0020] (2) The circulation flow optimization control method and device based on industrial chilled water equipment can quickly and accurately determine the degree of wear of the impeller by setting a wear threshold and comparing the impeller wear assessment value with it in real time. When the impeller wear assessment value is less than the first wear threshold, the impeller is judged to be normal. Maintaining operation can ensure stable operation of the equipment and avoid unnecessary adjustments. If it is between the first and second wear thresholds, an alarm is issued in time and the flow is adjusted. When the impeller has a certain amount of wear but is not seriously damaged, the water pump performance can be maintained as much as possible through flow adjustment, and the operator is reminded to pay attention. When the assessment value is greater than or equal to the second wear threshold, an impeller damage warning is issued and a countdown is counted down to shut down the impeller, which can prevent equipment failure or safety accidents caused by sudden damage to the impeller, effectively protect the safety of equipment and personnel, and ensure the safe and stable operation of the entire system.

[0021] (3) The circulation flow optimization control method and device based on industrial chillers can accurately compensate for the impact of impeller wear on water pump performance through the actual adjustment value obtained. When the impeller is severely worn and the flow rate decreases, a larger speed adjustment value is obtained through the calculation, that is, the speed is reduced, leakage, hydraulic loss and vibration caused by wear are reduced, abnormal operation of the equipment is avoided, the risk of failure and energy consumption are reduced, and the water pump can be ensured to operate efficiently and stably under different impeller wear conditions.

[0022] (4) The circulation flow optimization control method and device based on industrial chilled water equipment can ensure that the water pump operates within a safe and efficient speed range by setting a speed threshold and performing flow control accordingly. The sound and light generator facilitates timely communication of abnormal information to the staff and can flexibly adjust the water pump speed according to different situations. When the actual adjustment value is greater than or equal to the speed threshold, the water pump speed is adjusted to the actual adjustment value and the staff is notified so that the water pump can operate at the optimized speed to ensure stable flow. If the actual adjustment value is less than the speed threshold, it is adjusted to the speed threshold and an alarm is issued, which can not only prevent the speed from being too low and affecting the performance of the equipment, but also inform the staff in time so that further measures can be taken to effectively ensure the stable operation of the water pump and optimize flow control.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the circulation flow optimization control method based on industrial chiller equipment of the present invention; Figure 2 This is a structural diagram of a circulating flow optimization control device based on industrial chiller equipment according to the present invention; Figure 3 Schematic diagram of operation impact value in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiment of the present invention provides a technical solution: a circulation flow optimization control method based on industrial chiller equipment, such as Figure 1 As shown, the following steps are included: Step 1: Obtain wear data at the impeller, the wear data including flow data, vibration data and impeller damage data, and obtain an impeller wear assessment value based on the wear data; Specifically, the steps for obtaining the impeller wear assessment value are as follows: The flow data includes: flow difference and flow change amplitude. Comprehensive analysis of flow data is performed to obtain flow assessment value; The vibration data includes: vibration frequency, vibration amplitude and vibration phase difference. The vibration data is comprehensively analyzed to obtain the vibration evaluation value; Impeller damage data include: water particle concentration, water pH and pump operation time. Comprehensive analysis of impeller damage data can be performed to obtain the operation impact value. The flow impact value, vibration evaluation value and operation evaluation value are normalized, and the flow impact value, vibration evaluation value and operation evaluation value are comprehensively analyzed to obtain the impeller wear evaluation value; The impeller wear assessment value is obtained as follows: ; In the formula, Indicates the impeller wear assessment value. The larger the value, the more serious the impeller wear and the greater the impact on the flow. Conversely, the smaller the value, the lighter the impeller wear and the smaller the impact on the flow. represents the traffic weight factor, represents the flow evaluation value, represents the vibration weight factor, represents the vibration evaluation value, represents the running weight factor, represents the operational impact value, where , as well as The acquisition method is as follows: the flow data, vibration data, impeller damage data and the corresponding actual measured values ​​of impeller wear degree of the water pump under different working conditions are obtained through the company's operation database, and the flow data, vibration data, impeller damage data and the corresponding actual measured values ​​of impeller wear degree of the water pump are preprocessed, and the actual measured value of impeller wear degree is used as the dependent variable, and the flow evaluation value, vibration evaluation value and operation evaluation value are used as independent variables. A multivariate linear regression model is established, and the regression model is solved and normalized to obtain , as well as And stored in the operation database, it can be called in time when used, and , as well as The sum is 1, for example is 0.3, is 0.4 and is 0.3.

[0027] In this embodiment, by obtaining the impeller wear assessment value, the wear condition of the impeller can be accurately grasped, and the flow control can be optimized in a targeted manner. When the impeller wear is light, the existing flow control strategy is maintained to ensure efficient operation of the water pump. If the wear is heavy, the speed adjustment value is calculated according to the proportional law based on the assessment value and the current flow, speed and other data of the water pump, and the speed is adjusted reasonably to reduce leakage, hydraulic loss and vibration caused by wear, thereby ensuring that the flow meets the demand and avoiding the operation of the equipment in an abnormal state, achieving optimal control of the flow and improving the stability and efficiency of the water pump operation.

[0028] Specifically, the steps for obtaining the flow evaluation value are as follows: Preset the collection time period and set the collection times based on the preset collection time period; A flow sensor is provided to record and store the cold water flow at the impeller and the cold water flow at the pipeline in real time based on the number of acquisitions into an operation database; Calculate the difference between the cold water flow at the impeller and the cold water flow at the pipeline to obtain the flow difference, and store the flow difference in the operation database; Based on the preset collection time period, all flow difference values ​​collected in the operation database are averaged to obtain the flow difference average, the number of collections, the flow difference average and the flow difference are comprehensively analyzed to obtain the flow fluctuation assessment value, and the flow fluctuation assessment value is normalized to obtain the flow assessment value; The flow fluctuation evaluation value is obtained as follows: ; In the formula, It represents the flow fluctuation assessment value, specifically the standard deviation of the flow difference, which is used to measure the discreteness or fluctuation of the flow difference at different times. If the flow fluctuation assessment value is large, it means that the flow difference changes greatly, which means that the flow stability of the system is poor; if the flow fluctuation assessment value is small, it means that the flow difference is relatively stable and the flow state of the system is relatively stable. Indicates the number of collections, specifically the number of times the traffic data is collected within the preset collection time period. Indicates The flow difference collected for the first time, specifically The difference between the cold water flow at the impeller and the cold water flow at the pipeline obtained during the first collection, Indicates the mean flow difference, specifically the average value of all flow differences within the preset collection time period, representing the average level of flow differences within the preset collection time period. The square of the deviation between the flow difference and the mean flow difference is calculated, the deviation is converted into a positive value, and the larger deviation is highlighted to facilitate subsequent calculations.

[0029] Specifically, the steps for obtaining the vibration evaluation value are as follows: Vibration sensors are arranged on opposite sides of the water pump; The vibration frequency, vibration amplitude and vibration phase difference are collected by a vibration sensor, and the vibration frequency, vibration amplitude and vibration phase difference are normalized; The vibration phase difference is obtained as follows: Based on the number of collection times, vibration signals on two opposite sides of the water pump are collected, and discretized to obtain a first signal and a second signal, where the first signal and the second signal are respectively the vibration signals on two opposite sides of the water pump after discretization; Performing Fourier transform on the discretized first signal and the second signal to obtain a first frequency domain signal and a second frequency domain signal, wherein the frequency domain signal is a complex sequence; Traverse a frequency domain signal and a second frequency domain signal, and find the complex element corresponding to the frequency component with the largest amplitude; Using the argument function, respectively calculate the corresponding complex numbers found in the first frequency domain signal and the second frequency domain signal to obtain the first phase and the second phase, and perform a difference calculation on the first phase and the second phase to obtain a vibration phase difference; The vibration frequency, vibration amplitude and vibration phase difference are added and averaged to obtain the vibration mean; Calculate the sum of squares of deviations of vibration frequency, vibration amplitude and vibration phase difference from the vibration mean respectively; The vibration mean and the sum of squared deviations are calculated comprehensively to obtain the variation evaluation value; The mutation evaluation value is obtained as follows: ; In the formula, It represents the variation evaluation value, which specifically reflects the influence of the discrete degree of vibration-related parameters on vibration evaluation. It represents the sum of squared deviations, which specifically measures the sum of the deviations of each normalized parameter from the mean. Represents the vibration mean, which is specifically used to measure the deviation of each parameter; The variation evaluation value, vibration frequency, vibration amplitude, vibration phase difference and vibration mean are comprehensively calculated to obtain the vibration evaluation value; The vibration evaluation value is obtained as follows: ; In the formula, It indicates the vibration evaluation value, which is obtained by calculating the parameters related to vibration frequency, vibration amplitude and vibration phase difference. The larger the vibration evaluation value, the worse the stability of the water pump operation; the smaller the vibration evaluation value, the better the stability of the water pump operation. represents the vibration frequency, represents the vibration mean, which is the average value of the vibration frequency, vibration amplitude and vibration phase difference after normalization. Indicates the vibration amplitude, which is used by specific users to measure the intensity of pump vibration. Indicates the vibration phase difference, which specifically reflects the synchronization or coordination of the vibrations on both sides of the pump. It represents the variation evaluation value. The larger the coefficient of variation, the greater the difference between the parameters, which is reflected in the vibration of the water pump. That is, the discrete degree of each vibration characteristic parameter is large, which means that the complexity and instability of the vibration state of the water pump increase. On the contrary, the smaller the coefficient of variation, the closer the parameters are to the mean, indicating that the vibration state of the water pump is relatively stable. In this calculation, it is used to adjust the square sum of the deviations of each parameter in the numerator to the vibration evaluation value. The degree of influence The value can reflect the actual vibration status of the pump.

[0030] Specifically, the steps for obtaining the running impact value are as follows: Set up water quality sensors; Based on the number of collections within a preset collection time period, water quality information of each operation is collected through a water quality sensor; Water quality information includes: water particle concentration and water pH; like Figure 3 As shown, the total operation time of the water pump is obtained, the water quality information collected each time is summed up, and the summed water quality information is normalized. At the same time, the normalized water quality information, the total operation time of the water pump and the number of collections are comprehensively calculated to obtain the operation impact value; The operation impact value is obtained as follows: ; In the formula, Indicates the operation impact value, specifically the overall impact of water quality information and collection time on the operation of the pump. Indicates the total collection time of the water pump, specifically the total cumulative running time of the water pump from the time it was put into use to the current time. Indicates the number of collections, specifically the number of collections within the preset collection time. Indicates The particle concentration of water quality during the first collection is specifically the concentration of the water pump. During the first operation, the content of solid particle impurities in the water body in contact with Indicates The pH value of water quality at the time of the first collection, specifically the water pump The pH value of the water body contacted during the first collection, The combined impact of water quality information on pump operation is considered; Table 1 Operational impact values

[0031] As shown in Table 1, in this embodiment, the water particle concentration, water pH and operation impact value are specifically covered. The operation impact value comprehensively considers the water particle concentration and water pH. The value directly reflects the difference in the degree of influence of different water quality conditions on the operation of the water pump. The larger the value, the greater the comprehensive impact of water quality on the operation of the water pump under this set of water quality conditions, which will accelerate the wear and corrosion of the water pump parts, thereby affecting the performance and life of the water pump, and helping to understand the operation of the water pump under different water quality environments. By analyzing these data, operation and maintenance personnel can promptly discover problems that may occur to the operation of the water pump under different water quality conditions, and facilitate targeted maintenance or adjustments according to actual conditions, thereby optimizing the operation of the water pump and ensuring the stable and efficient operation of the water pump under different water quality conditions.

[0032] Step 2: setting a wear threshold, judging the impeller wear according to the impeller wear assessment value and the wear threshold, and obtaining an impeller wear judgment result; Specifically, the specific steps for obtaining the impeller wear judgment result are as follows: Setting a first wear threshold and a second wear threshold, wherein the second wear threshold is greater than the first wear threshold, and comparing the impeller wear assessment value with the first wear threshold and the second wear threshold in real time; If the impeller wear assessment value is less than the first wear threshold, the impeller is judged to be normal and the current operating state is maintained without adjustment; If the impeller wear assessment value is greater than or equal to the first wear threshold and less than the second wear threshold, it will be determined that the current impeller is worn, and an alarm with the impeller wear problem will be issued to the operator, and the flow rate will be adjusted at the same time; If the impeller wear assessment value is greater than or equal to the second flow threshold, the current impeller will be judged to be severely worn, and a warning message will be sent to the staff that the impeller is about to be damaged and a countdown for closing the valve and water pump will be sent, and the valve and water pump will be closed after the countdown ends.

[0033] In this embodiment, by setting a wear threshold and comparing the impeller wear assessment value with it in real time, the degree of wear of the impeller can be quickly and accurately determined. When the impeller wear assessment value is less than the first wear threshold, the impeller is determined to be normal. Maintaining operation can ensure stable operation of the equipment and avoid unnecessary adjustments. If it is between the first and second wear thresholds, an alarm is issued in time and the flow rate is adjusted. When the impeller has a certain amount of wear but is not seriously damaged, the performance of the water pump can be maintained as much as possible through flow adjustment, and the operator is reminded to pay attention. When the assessment value is greater than or equal to the second wear threshold, an impeller damage warning is issued and a countdown is counted to shut down the impeller, which can prevent equipment failure or safety accidents caused by sudden damage to the impeller, effectively protect the safety of equipment and personnel, and ensure the safe and stable operation of the entire system.

[0034] Step 3: If the impeller wear judgment result is that the current impeller is worn, the operation data is obtained, and the impeller wear assessment value and the operation data are comprehensively analyzed to obtain the actual adjustment value; Specifically, the steps for obtaining the actual adjustment value are as follows: Operation data include: current flow rate and current speed of the water pump; Set up a flow sensor and a speed sensor; Collect and store the current flow rate and speed of the water pump in real time into the operation database; According to the proportional law of the water pump, the current speed of the water pump, the current flow rate of the water pump and the impeller wear assessment value are comprehensively calculated to obtain the speed adjustment value; The speed adjustment value is obtained as follows: ; In the formula, Indicates the speed adjustment value, specifically the amount by which the current speed of the pump needs to be adjusted to compensate for the impact of impeller wear on the performance of the pump. The larger the speed adjustment value, the more the speed needs to be reduced. Specifically, a larger speed adjustment value means that the impeller wear is already serious, resulting in a large drop in the flow rate of the pump. By reducing the speed, leakage, hydraulic loss and vibration caused by wear can be reduced, and the equipment can be prevented from operating in an abnormal state, thereby avoiding possible failure risks and excessive energy consumption; Indicates the current speed of the water pump, specifically the speed at which the water pump is running when the impeller wear assessment and speed adjustment are being performed. Indicates the current flow rate of the water pump, specifically the actual flow rate delivered by the water pump while measuring the speed. represents the impeller wear assessment value, which is a quantitative assessment result of the impeller wear degree. In this formula, It reflects the impact ratio of impeller wear on flow. When the impeller wear assessment value is 0, it means that the impeller is not worn and has no impact on the flow. As the impeller wear assessment value gradually increases, the smaller the calculation result is, indicating that impeller wear will lead to a decrease in the actual effective flow ratio. Add the speed adjustment value to the current speed of the pump to obtain the actual adjustment value.

[0035] In this embodiment, the actual adjustment value is obtained by obtaining the speed adjustment value, which can accurately compensate for the impact of impeller wear on the performance of the water pump. When the impeller is severely worn and the flow rate decreases, a larger speed adjustment value is obtained through this calculation, that is, the speed is reduced, leakage, hydraulic loss and vibration caused by wear are reduced, abnormal operation of the equipment is avoided, the risk of failure and energy consumption are reduced, and the water pump can be ensured to operate efficiently and stably under different impeller wear conditions.

[0036] Step 4: Set the speed threshold and perform flow control based on the actual adjustment value and the speed threshold.

[0037] Specifically, the specific steps for flow control according to the actual adjustment value and the speed threshold are as follows: Install a sound and light generator at the water pump; Set the speed threshold and compare the actual adjustment value with the speed threshold in real time; If the actual adjustment value is greater than or equal to the speed threshold, the current speed of the pump will be adjusted to the actual adjustment value, and the current speed and adjustment information will be sent to the staff; If the actual adjustment value is less than the speed threshold, the current water pump speed will be adjusted to the speed threshold, and the current speed and adjustment information will be sent to the staff, and an alarm will be issued through the sound and light generator.

[0038] In this embodiment, by setting a speed threshold and performing flow control accordingly, it is possible to ensure that the water pump operates within a safe and efficient speed range. The sound and light generator is convenient for timely conveying abnormal information to the staff, and the water pump speed can be flexibly adjusted according to different situations. When the actual adjustment value is greater than or equal to the speed threshold, the water pump speed is adjusted to the actual adjustment value and the staff is notified so that the water pump can operate at the optimized speed to ensure stable flow. If the actual adjustment value is less than the speed threshold, it is adjusted to the speed threshold and an alarm is issued, which can not only prevent the speed from being too low and affecting the performance of the equipment, but also inform the staff in time so that further measures can be taken to effectively ensure the stable operation of the water pump and optimize flow control.

[0039] Circulation flow optimization control device based on industrial chiller equipment, such as Figure 2 As shown, it includes a wear degree assessment module, a wear degree judgment module, a flow optimization adjustment module and a speed judgment module; A wear degree assessment module is used to obtain wear data at the impeller, the wear data includes flow data, vibration data and impeller damage data, obtain an impeller wear assessment value based on the wear data, and transmit the impeller wear assessment value to the wear degree judgment module; A wear degree judgment module is used to set a wear threshold, judge the impeller wear according to the impeller wear assessment value and the wear threshold, obtain the impeller wear judgment result, and transmit the impeller wear judgment result to the flow optimization and regulation module; The flow optimization and adjustment module is used to receive the impeller wear judgment result. If the impeller wear judgment result is that the current impeller is worn, the operation data is obtained, and the impeller wear assessment value and the operation data are comprehensively analyzed to obtain the actual adjustment value, and the actual adjustment value is transmitted to the flow control optimization module; The flow control optimization module is used to receive the actual adjustment value, set the speed threshold, and perform flow control according to the actual adjustment value and the speed threshold.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A circulation flow optimization control method based on industrial chillers, characterized in that: The following steps are involved: Step 1: Obtain wear data at the impeller, the wear data including flow data, vibration data and impeller damage data, and obtain an impeller wear assessment value based on the wear data; Step 2: setting a wear threshold, performing an impeller wear judgment based on the impeller wear assessment value and the wear threshold, and obtaining an impeller wear judgment result; Step 3: If the impeller wear judgment result is that the current impeller is worn, the operation data is obtained, and the impeller wear assessment value and the operation data are comprehensively analyzed to obtain the actual adjustment value; Step 4: Set the speed threshold and perform flow control based on the actual adjustment value and the speed threshold.

2. The circulation flow optimization control method based on industrial chiller equipment according to claim 1 is characterized in that: The steps for obtaining the impeller wear assessment value are as follows: Comprehensively analyze the flow data to obtain the flow assessment value; Comprehensively analyze the vibration data to obtain the vibration assessment value; Comprehensively analyze the impeller damage data to obtain the operation impact value; The flow impact value, vibration assessment value and operation assessment value are normalized, and the flow impact value, vibration assessment value and operation assessment value are comprehensively analyzed to obtain the impeller wear assessment value.

3. The circulation flow optimization control method based on industrial chiller equipment according to claim 2 is characterized in that: The steps for obtaining the flow evaluation value are as follows: Preset the collection time period and set the collection times based on the preset collection time period; Based on the number of collections, collect the cold water flow at the impeller and the cold water flow at the pipeline; Calculate the difference between the cold water flow at the impeller and the cold water flow at the pipeline to obtain the flow difference; Based on the number of acquisitions, the flow difference is averaged to obtain the flow difference mean; The number of collection times, the mean flow difference and the flow difference are comprehensively analyzed to obtain the flow fluctuation assessment value, and the flow fluctuation assessment value is normalized to obtain the flow assessment value.

4. The circulation flow optimization control method based on industrial chiller equipment according to claim 3 is characterized in that: The flow fluctuation evaluation value is obtained in the following manner: ； In the formula, represents the flow fluctuation assessment value, Indicates the number of collections. Indicates The flow difference of the collected Indicates the mean flow difference.

5. The circulation flow optimization control method based on industrial chiller equipment according to claim 2 is characterized in that: The steps for obtaining the vibration evaluation value are as follows: Based on the number of collections within a preset time period, the vibration frequency, vibration amplitude and vibration phase difference are collected, and the vibration frequency, vibration amplitude and vibration phase difference are normalized; The vibration evaluation value is obtained by comprehensively calculating the normalized vibration frequency, vibration amplitude and vibration phase difference.

6. The circulation flow optimization control method based on industrial chiller equipment according to claim 1 is characterized in that: The steps for obtaining the operation impact value are as follows: Collect water quality information based on the set collection times; Water quality information includes: water particle concentration and water pH; The total running time of the water pump is obtained, the water quality information collected each time is summed up and normalized. At the same time, the normalized water quality information, the total running time of the water pump and the number of collection times are comprehensively calculated to obtain the operation impact value.

7. The circulation flow optimization control method based on industrial chiller equipment according to claim 1 is characterized in that: The specific steps of obtaining the impeller wear judgment result are as follows: Setting a first wear threshold and a second wear threshold, and comparing the impeller wear assessment value with the first wear threshold and the second wear threshold in real time; If the impeller wear assessment value is less than the first wear threshold, the impeller is judged to be normal; If the impeller wear assessment value is greater than or equal to the first wear threshold and less than the second wear threshold, it is determined that the current impeller is worn; If the impeller wear assessment value is greater than or equal to the second flow threshold, it will be determined that the current impeller wear is serious, and the valve and water pump will be closed.

8. The circulation flow optimization control method based on industrial chiller equipment according to claim 1 is characterized in that: The steps for obtaining the actual adjustment value are as follows: Operation data include: current flow rate and current speed of the water pump; The current speed of the water pump, the current flow rate of the water pump and the impeller wear assessment value are comprehensively calculated to obtain the speed adjustment value, and the speed adjustment value is added to the current speed of the water pump to obtain the actual adjustment value.

9. The circulation flow optimization control method based on industrial chiller equipment according to claim 1 is characterized in that: The specific steps of performing flow control according to the actual adjustment value and the speed threshold are as follows: Set the speed threshold and compare the actual adjustment value with the speed threshold in real time; If the actual adjustment value is greater than or equal to the speed threshold, the current speed of the pump will be adjusted to the actual adjustment value, and the current speed and adjustment information will be sent to the staff; If the actual adjustment value is less than the speed threshold, the current pump speed will be adjusted to the speed threshold, and the current speed and adjustment information will be sent to the staff, and an alarm will be issued at the same time.

10. A circulating flow optimization control device based on an industrial chiller, using a circulating flow optimization control method based on an industrial chiller according to any one of claims 1 to 9, characterized in that: include: A wear degree assessment module is used to obtain wear data at the impeller, the wear data includes flow data, vibration data and impeller damage data, obtain an impeller wear assessment value based on the wear data, and transmit the impeller wear assessment value to the wear degree judgment module; A wear degree judgment module is used to set a wear threshold, judge the impeller wear according to the impeller wear assessment value and the wear threshold, obtain the impeller wear judgment result, and transmit the impeller wear judgment result to the flow optimization and regulation module; The flow optimization and adjustment module is used to receive the impeller wear judgment result. If the impeller wear judgment result is that the current impeller is worn, the operation data is obtained, and the impeller wear assessment value and the operation data are comprehensively analyzed to obtain the actual adjustment value, and the actual adjustment value is transmitted to the flow control optimization module; The flow control optimization module is used to receive the actual adjustment value, set the speed threshold, and perform flow control according to the actual adjustment value and the speed threshold.

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