Energy-saving centrifugal fan flexible installation design method and centrifugal fan thereof

Abstract

The invention discloses an energy-saving centrifugal fan flexible installation design method and a centrifugal fan thereof, relates to the technical field of fan flexible installation, and solves the technical problems that in the prior art, a fan cannot be subjected to a balance test, and a pipeline connection mode cannot be set after the balance test is finished, in particular to a fan balance test. When the energy-saving centrifugal fan is installed, balance testing is conducted on the structure of the energy-saving centrifugal fan, static balance information and dynamic balance information are collected, and whether balance debugging is conducted on the fan or not is deduced according to information comparison; and setting a pipeline connection mode, after the structural balance of the energy-saving centrifugal fan is ensured, setting the connection mode of a pipeline connected with the energy-saving centrifugal fan, marking the position, needing to be connected with the pipeline, of the fan as a pipeline analysis position, collecting internal transmission data and external transmission data, and setting the connection mode according to a data analysis result.

Description

Technical Field

[0001] The invention relates to the technical field of flexible installation of fans, and in particular to a flexible installation design method for an energy-saving centrifugal fan and a centrifugal fan thereof. Background Art

[0002] Energy-saving centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas.

[0003] It is mainly composed of an impeller, a casing, an air inlet, an air outlet and other parts; the patent with announcement number CN112901732A discloses a flexible motor and a flexible starting method, which solves the technical problems that the existing motor is prone to stalling during starting or overloading, and the motor may even be burned out after a long time. The motor includes a motor body, which includes a motor outer shell and a motor rotor output shaft. A motor end cover is provided at the front end of the motor outer shell; a continuously variable transmission is provided at the output end of the motor rotor output shaft.

[0004] However, in the prior art, when the energy-saving centrifugal fan is actually installed, it is impossible to perform a balance test on the fan itself, and it is impossible to set the pipeline connection method after the balance test, which reduces the flexible installation efficiency of the fan. In addition, it is impossible to screen the installation position according to the specifications of the fan itself, which reduces the accuracy of the installation.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned problems and to provide a flexible installation design method for an energy-saving centrifugal fan and a centrifugal fan thereof.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A flexible installation design method for energy-saving centrifugal fans, the specific flexible installation design method process is as follows: Fan balance test: When installing the energy-saving centrifugal fan, perform a balance test on the structure of the energy-saving centrifugal fan itself, collect static balance information and dynamic balance information, and infer whether the fan has been balanced and debugged based on the information comparison; Pipeline connection mode setting: After ensuring the structural balance of the energy-saving centrifugal fan, set the connection mode of the pipelines connected to the energy-saving centrifugal fan, mark the location where the fan needs to be connected to the pipeline as the pipeline analysis location, collect internal and external transportation data, and set the connection mode according to the data analysis results; After the installation location is determined and the pipeline connection method is set, the current energy-saving centrifugal fan is sited and installed, the real-time installation area is divided into several installation points, point screening information is collected, and the screening analysis coefficient of the installation point is calculated. The installation points are screened based on the coefficient comparison and divided into suitable points and non-suitable points. The administrator determines the installation points according to the point type; Installation design inspection: After the energy-saving centrifugal fan completes the installation site selection, the energy-saving centrifugal fan is subjected to installation design inspection, the trial operation period is set, the startup monitoring data and operation monitoring data are collected, and the trial operation period is adjusted according to the data comparison results.

[0008] As a preferred embodiment of the present invention, the static balance information is: when the energy-saving centrifugal fan enters the balance frame in a stationary state, the deviation distance value of the centrifugal fan impeller center of gravity position corresponding to different balance test moments; the dynamic balance information is when the energy-saving centrifugal fan is in a rotating state, when the impeller center of gravity position floats away from the previous adjacent balance test moment, the maximum floating distance completed the correction at the next adjacent balance test moment.

[0009] As a preferred embodiment of the present invention, if the static balance information exceeds the deviation distance threshold, or the dynamic balance information does not exceed the corrected floating distance threshold, the current energy-saving centrifugal fan is balanced and debugged; if the static balance information does not exceed the deviation distance threshold, and the dynamic balance information exceeds the corrected floating distance threshold, it is inferred that the balance test of the energy-saving centrifugal fan is qualified.

[0010] As a preferred embodiment of the present invention, the internal transportation data is: the numerical ratio of the maximum increase in gas transportation pressure corresponding to the pipeline analysis position to the maximum value of the gas transportation supply duration at the current position; the external transportation data is: the increase span of the pipeline vibration frequency when the sealing performance requirements increase under the simulated operating state of the energy-saving centrifugal fan.

[0011] As a preferred embodiment of the present invention, if the internal transport data exceeds the numerical ratio threshold, or the external transport data exceeds the frequency increase span threshold, the current pipeline analysis position is marked as a flexible pipeline interface; if the internal transport data does not exceed the numerical ratio threshold, and the external transport data does not exceed the frequency increase span threshold, it is inferred that the current pipeline analysis position is suitable for a flexible connection mode and a rigid connection mode, and the flexible connection mode and the rigid connection mode are set in real time according to the actual structural stability connection requirements of the energy-saving centrifugal fan and the corrosion protection requirements of the installation location.

[0012] As a preferred embodiment of the present invention, the point screening information includes the thickness of the gasket required for the fan to be increased when the ground level corresponding to the installation point is adjusted to the same level as the fan installation level, the decreasing speed of the excess load corresponding to the installation point and the maximum load of the fan operation, and the excess of the maximum span value of the real-time installation area environmental parameters affected by the floating value exceeding the maximum value of the corresponding fan adaptation environmental parameter range.

[0013] As a preferred embodiment of the present invention, if the screening analysis coefficient of the installation point exceeds the screening analysis coefficient threshold, the real-time installation point is marked as a non-adaptive point; if the screening analysis coefficient of the installation point does not exceed the screening analysis coefficient threshold, the real-time installation point is marked as an adaptive point.

[0014] As a preferred embodiment of the present invention, the startup monitoring data and the operation monitoring data are respectively the instantaneous increase span of the vibration amplitude of the fan components corresponding to the startup phase of the energy-saving centrifugal fan during the trial operation period, and the delay span of the decrease speed of the real-time vibration amplitude of the fan body to the amplitude threshold during the continuous operation phase of the energy-saving centrifugal fan during the trial operation period.

[0015] As a preferred embodiment of the present invention, if the startup monitoring data exceeds the startup instantaneous increase span threshold, or the operation monitoring data exceeds the descending speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is high; if the startup monitoring data does not exceed the startup instantaneous increase span threshold, and the operation monitoring data does not exceed the descending speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is low.

[0016] As a preferred embodiment of the present invention, a centrifugal fan is applied to the above-mentioned energy-saving centrifugal fan flexible installation design method.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a balance test is performed on the structure of the energy-saving centrifugal fan itself to prevent the energy-saving centrifugal fan itself from being unbalanced, causing the vibration amplitude of the body to be too large when the energy-saving centrifugal fan is running, affecting the operating stability of the entire fan, thereby reducing the rationality of the flexible installation design. The fan balance test can effectively ensure the balance of the body, improve the operating efficiency of the energy-saving centrifugal fan, and avoid excessive vibration causing increased wear of the equipment itself; The connection methods are divided according to the operation requirements of the installation location of the pipeline, that is, the connection methods are divided into flexible connection methods and rigid connection methods. The flexible connection method is indicated by the pipeline material being canvas or rubber soft connection, and the rigid connection method is indicated by the pipeline material being metal or alloy pipeline. According to the connection method setting, the pipeline connection method is adjusted without affecting the operation of the energy-saving centrifugal fan, to ensure that the force of the connecting pipeline on the energy-saving centrifugal fan is reduced, so as to ensure the installation balance and operation balance of the energy-saving centrifugal fan.

[0018] 2. In the present invention, the terrain analysis of the selected installation location is used to infer whether the specifications of the current energy-saving centrifugal fan are suitable for installation at the current location, so as to ensure the rationality of the flexible installation design and avoid the geology of the fan installation location not meeting the fan specifications, thereby causing unstable installation balance and increasing the operating risk of the energy-saving centrifugal fan. The site selection analysis can improve the operating stability of the energy-saving centrifugal fan and avoid the increase in wear of the fan hardware equipment caused by the unsuitable location, thereby reducing the operating life of the energy-saving centrifugal fan. Carry out installation design inspection on energy-saving centrifugal fans, conduct operation evaluation based on real-time operating parameters of energy-saving centrifugal fans, infer whether the current flexible installation design is qualified, so as to ensure the feasibility of installation design of energy-saving centrifugal fans, and make timely adjustments in case of abnormalities to ensure that the fan can be in a balanced state after installation, thereby ensuring the operating efficiency of energy-saving centrifugal fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a principle block diagram of the present invention as a whole; Figure 2 A flow chart of the present invention as a whole; Figure 3 The installation point for the present invention is the identification flow chart. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] See also Figure 1-Figure 2 As shown, a flexible installation design method for energy-saving centrifugal fans is provided. The specific flexible installation design method process is as follows: Fan balancing test: When installing the energy-saving centrifugal fan, the structure of the energy-saving centrifugal fan itself is balanced to prevent the imbalance of the structure of the energy-saving centrifugal fan itself, which causes excessive vibration of the body during the operation of the energy-saving centrifugal fan, affecting the operating stability of the entire fan, thereby reducing the rationality of the flexible installation design. The fan balancing test can effectively ensure the balance of the body, improve the operating efficiency of the energy-saving centrifugal fan, and avoid excessive vibration causing increased wear on the equipment itself; After setting the pipe connection mode to ensure that the energy-saving centrifugal fan is structurally balanced, the connection mode of the pipes connected to the energy-saving centrifugal fan is set. The connection mode is divided according to the operating requirements of the installation location of the pipe, that is, the connection mode is divided into flexible connection mode and rigid connection mode. The flexible connection mode is represented by the pipe material being canvas or rubber soft connection, and the rigid connection mode is represented by the pipe material being metal or alloy pipe. According to the connection mode setting, the pipe connection mode is adjusted without affecting the operation of the energy-saving centrifugal fan, ensuring that the force of the connecting pipe on the energy-saving centrifugal fan is reduced, so as to ensure the installation balance and operation balance of the energy-saving centrifugal fan. After the installation location is determined and the pipeline connection method is set, the current energy-saving centrifugal fan is selected for installation and the site selection is analyzed. Through the terrain analysis of the selected installation location, it is inferred whether the specifications of the current energy-saving centrifugal fan are suitable for installation at the current location to ensure the rationality of the flexible installation design and avoid the geology of the fan installation location not meeting the fan specifications, resulting in unstable installation balance and increased operating risks of the energy-saving centrifugal fan. The site selection analysis can improve the operating stability of the energy-saving centrifugal fan and avoid increased wear of the fan hardware equipment caused by unsuitable locations, thereby reducing the operating life of the energy-saving centrifugal fan. Installation design inspection: After the energy-saving centrifugal fan is installed and sited, the energy-saving centrifugal fan is inspected for installation design. The operation is evaluated based on the real-time operating parameters of the energy-saving centrifugal fan to infer whether the current flexible installation design is qualified, thereby ensuring the feasibility of the installation design of the energy-saving centrifugal fan. In the event of an abnormality, timely adjustments can be made to ensure that the fan is in a balanced state after installation, thereby ensuring the operating efficiency of the energy-saving centrifugal fan. The fan balancing test process is as follows: During the stage when the energy-saving centrifugal fan is installed and transported, a balance test time is arbitrarily selected and a fan balance test is performed at the balance test time, and the deviation distance values ​​of the centrifugal fan impeller center of gravity position corresponding to different balance test times when the energy-saving centrifugal fan enters the balance frame in a stationary state are obtained. At the same time, the maximum floating distance of the energy-saving centrifugal fan in the rotating state when the impeller center of gravity position floats from the previous adjacent balance test time is obtained, and the deviation distance values ​​of the centrifugal fan impeller center of gravity position corresponding to different balance test times when the energy-saving centrifugal fan enters the balance frame in a stationary state are marked as static balance information; When the energy-saving centrifugal fan is in a rotating state and the impeller center of gravity position floats from the previous adjacent balance test moment, the maximum floating distance completed by correction at the next adjacent balance test moment is marked as dynamic balance information; wherein, the correction of the impeller center of gravity position is represented by the impeller center of gravity position shifting during the rotation process and completing the correction at the next adjacent moment. It can be understood that the performance of the energy-saving centrifugal fan equipment itself is better reflected by performing correction detection at adjacent moments; And when the energy-saving centrifugal fan enters the balance frame in a stationary state, the deviation distance value of the centrifugal fan impeller center of gravity position corresponding to different balance test moments, and when the energy-saving centrifugal fan is in a rotating state, when the impeller center of gravity position floats from the previous adjacent balance test moment, the maximum floating distance corrected at the next adjacent balance test moment is compared with the deviation distance threshold and the corrected floating distance threshold respectively: If the deviation distance values ​​of the centrifugal fan impeller center of gravity positions corresponding to different balancing test moments exceed the deviation distance threshold, or the maximum floating distance corrected at the next adjacent balancing test moment does not exceed the corrected floating distance threshold, it is inferred that the balance test of the energy-saving centrifugal fan is unqualified, and the current energy-saving centrifugal fan is balanced and debugged, the parts at the position of the impeller are repaired for wear, and the connection parts of the energy-saving centrifugal fan are checked for connection; If the deviation distance values ​​of the centrifugal fan impeller center of gravity positions corresponding to different balance test moments do not exceed the deviation distance threshold, and the maximum floating distance corrected at the next adjacent balance test moment exceeds the corrected floating distance threshold, it is inferred that the balance test of the energy-saving centrifugal fan is qualified; The process of setting the pipeline connection method is as follows: The pipeline connection mode is set for the fan that has completed the balance test, and the position where the fan needs to be connected to the pipeline is marked as the pipeline analysis position. The operation simulation is performed according to the component structure of the energy-saving centrifugal fan. The state of the coordinated operation of the components can be inferred according to the operating components of the fan, and the numerical ratio of the maximum increase in gas delivery pressure corresponding to the pipeline analysis position under the simulated operation state of the energy-saving centrifugal fan and the maximum value of the gas delivery supply duration at the current position is obtained, where the numerical ratio is expressed as the numerical ratio of two data, regardless of the unit of the data, and only the impact analysis of the numerical fluctuation of the data is performed. In this scheme, the greater the increase in gas delivery pressure and the smaller the corresponding delivery duration, it indicates that the pipeline at the current position needs to be set with a flexible connection mode. The flexible connection can reduce the impact of the delivery pressure, and the corresponding flexible connection during the operation time will not affect the pipeline force; and the numerical ratio of the maximum increase in gas delivery pressure corresponding to the pipeline analysis position under the simulated operation state of the energy-saving centrifugal fan and the maximum value of the gas delivery supply duration at the current position is marked as internal delivery data; Obtain the increase span of the pipeline vibration frequency when the sealing performance requirement increases under the simulated operation state of the energy-saving centrifugal fan, and mark the increase span of the pipeline vibration frequency when the sealing performance requirement increases under the simulated operation state of the energy-saving centrifugal fan as external transmission data; And the internal transmission data and the external transmission data are compared with the value ratio threshold and the frequency increase span threshold respectively: If the internal transport data exceeds the value ratio threshold, or the external transport data exceeds the frequency increase span threshold, it is inferred that the current pipeline analysis position is suitable for a flexible connection mode, and the current pipeline analysis position is marked as a flexible pipeline interface; If the internal transmission data does not exceed the value ratio threshold, and the external transmission data does not exceed the frequency increase span threshold, it is inferred that the current pipeline analysis position is suitable for flexible connection and rigid connection. According to the actual structural stability connection requirements of the energy-saving centrifugal fan and the corrosion protection requirements of the installation position, the flexible connection and rigid connection are set in real time. That is, if there is a corrosion risk at the installation position, it is set to a rigid connection. If the real-time structural stability requires processing, it is set to a rigid connection. The installation location determination process is as follows: The real-time installation area is divided into several installation points, and the thickness of the fan gasket needs to be increased when the ground level corresponding to the installation point in the real-time installation area is adjusted to be consistent with the fan installation level, and the thickness of the fan gasket needs to be increased when the ground level corresponding to the installation point in the real-time installation area is adjusted to be consistent with the fan installation level is marked as HD; Obtain the decreasing speed of the excess of the load-bearing amount corresponding to the installation point in the real-time installation area and the maximum load of the fan operation, and mark the decreasing speed of the excess of the load-bearing amount corresponding to the installation point in the real-time installation area and the maximum load of the fan operation as XJ, wherein the load-bearing amount of the installation point is in a decreasing trend with the actual location environment and structural aging, and obtain the dynamic load generated by the operation of the fan in addition to its own mass load according to the fan specifications, and infer whether the current point is qualified according to the load calculation; The maximum span value of the affected floating of the real-time installation area environmental parameters exceeds the maximum value of the corresponding fan adaptation environmental parameter range, and the maximum span value of the affected floating of the real-time installation area environmental parameters exceeds the maximum value of the corresponding fan adaptation environmental parameter range, and the excess amount is marked as DC, where the environmental parameters are represented by parameters such as temperature and humidity, and the affected floating means that the environmental parameters of the installation point are suddenly affected by the outside world, resulting in the floating of parameter values; The above collected information is uniformly marked as point screening information, and substituted into the formula to obtain the screening analysis coefficient of the installation points in the real-time installation area, where the formula is: , where G is the screening analysis coefficient of the installation point, uy1, uy2 and uy3 are the preset proportional coefficients, and β is the error correction factor with a value of 0.968; See also Figure 3 , compare the screening analysis coefficient of the installation point with the screening analysis coefficient threshold: If the screening analysis coefficient of the installation point exceeds the screening analysis coefficient threshold, it is inferred that the current installation point in the real-time installation area is not suitable for installation and is marked as a non-adaptive point; If the screening analysis coefficient of the installation point does not exceed the screening analysis coefficient threshold, it is inferred that the current installation point in the real-time installation area is suitable for installation and is marked as an adaptable point; the administrator determines the installation point according to the point type; The installation design and testing process is as follows: A trial operation analysis is performed on the installed energy-saving centrifugal fan, and a trial operation time period is set according to the trial operation analysis results. The instantaneous increase span of the vibration amplitude of the fan components corresponding to the start-up phase of the energy-saving centrifugal fan in the trial operation period is obtained. At the same time, the descent speed delay span of the real-time vibration amplitude of the fan body in the continuous operation phase of the energy-saving centrifugal fan in the trial operation period when it drops to the amplitude threshold is obtained. The instantaneous increase span of the vibration amplitude of the fan components corresponding to the start-up phase of the energy-saving centrifugal fan in the trial operation period and the descent speed delay span of the real-time vibration amplitude of the fan body in the continuous operation phase of the energy-saving centrifugal fan in the trial operation period when it drops to the amplitude threshold are marked as startup monitoring data and operation monitoring data, respectively, and compared with the startup instantaneous increase span threshold and the descent speed delay span threshold, respectively: If the instantaneous increase span of the vibration amplitude of the corresponding fan component during the startup phase of the energy-saving centrifugal fan during the trial operation period exceeds the threshold of the instantaneous increase span at startup, or the falling speed delay span of the fan body during the continuous operation phase of the energy-saving centrifugal fan during the trial operation period when the real-time vibration amplitude of the fan body drops to the amplitude threshold exceeds the falling speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is high, and the current fan is set to a soft start program. If the vibration amplitude still cannot be controlled, the trial operation period is shortened by half and the fan is debugged; If the instantaneous increase span of the vibration amplitude of the corresponding fan components during the startup phase of the energy-saving centrifugal fan during the trial operation period does not exceed the startup instantaneous increase span threshold, and the falling speed delay span of the fan body during the continuous operation phase of the energy-saving centrifugal fan during the trial operation period when the real-time vibration amplitude of the fan body drops to the amplitude threshold does not exceed the falling speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is low; the installation point of the current energy-saving centrifugal fan is stored and uploaded to the system; A centrifugal fan implements the above-mentioned energy-saving centrifugal fan flexible installation design method when the centrifugal fan is installed.

[0024] The above formulas are obtained by collecting a large amount of data and performing software simulation, and a formula close to the actual value is selected. The coefficients in the formula are set by technicians in this field according to actual conditions; When the present invention is in use, a fan balance test is performed. When the energy-saving centrifugal fan is installed, a balance test is performed on the structure of the energy-saving centrifugal fan itself; a pipeline connection method is set. After ensuring that the energy-saving centrifugal fan structure is balanced, the connection method of the pipelines connected to the energy-saving centrifugal fan is set; the installation position is determined. After the pipeline connection method is set, the current energy-saving centrifugal fan is sited and installed, and the administrator determines the installation point according to the point type; an installation design test is performed. After the energy-saving centrifugal fan completes the installation site selection, the energy-saving centrifugal fan is subjected to an installation design test.

[0025] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. 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 flexible installation design method for an energy-saving centrifugal fan, characterized in that: The specific flexible installation design method process is as follows: Fan balance test: When installing the energy-saving centrifugal fan, perform a balance test on the structure of the energy-saving centrifugal fan itself, collect static balance information and dynamic balance information, and infer whether the fan has been balanced and debugged based on the information comparison; Pipeline connection mode setting: After ensuring the structural balance of the energy-saving centrifugal fan, set the connection mode of the pipelines connected to the energy-saving centrifugal fan, mark the location where the fan needs to be connected to the pipeline as the pipeline analysis location, collect internal and external transportation data, and set the connection mode according to the data analysis results; After the installation location is determined and the pipeline connection method is set, the current energy-saving centrifugal fan is sited and installed, the real-time installation area is divided into several installation points, point screening information is collected, and the screening analysis coefficient of the installation point is calculated. The installation points are screened based on the coefficient comparison and divided into suitable points and non-suitable points. The administrator determines the installation points according to the point type; Installation design inspection: After the energy-saving centrifugal fan completes the installation site selection, the energy-saving centrifugal fan is subjected to installation design inspection, the trial operation period is set, the startup monitoring data and operation monitoring data are collected, and the trial operation period is adjusted according to the data comparison results.

2. The method for designing an energy-saving centrifugal fan with flexible installation according to claim 1, characterized in that: The static balance information is: when the energy-saving centrifugal fan enters the balance frame in a stationary state, the deviation distance value of the centrifugal fan impeller center of gravity position corresponding to different balance test moments; the dynamic balance information is when the energy-saving centrifugal fan is in a rotating state, when the impeller center of gravity position floats from the previous adjacent balance test moment, and the maximum floating distance completed the correction at the next adjacent balance test moment.

3. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 2, characterized in that: If the static balance information exceeds the deviation distance threshold, or the dynamic balance information does not exceed the corrected floating distance threshold, the current energy-saving centrifugal fan is balanced and debugged; if the static balance information does not exceed the deviation distance threshold, and the dynamic balance information exceeds the corrected floating distance threshold, it is inferred that the balance test of the energy-saving centrifugal fan is qualified.

4. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 1, characterized in that: The internal transportation data is: the numerical ratio of the maximum increase in gas transportation pressure corresponding to the pipeline analysis position to the maximum duration of gas transportation supply at the current position; the external transportation data is: the increase span of pipeline vibration frequency when the sealing performance requirements increase under the simulated operation state of the energy-saving centrifugal fan.

5. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 4, characterized in that: If the internal transport data exceeds the numerical ratio threshold, or the external transport data exceeds the frequency increase span threshold, the current pipeline analysis position is marked as a flexible pipeline interface; if the internal transport data does not exceed the numerical ratio threshold, and the external transport data does not exceed the frequency increase span threshold, it is inferred that the current pipeline analysis position is suitable for flexible connection mode and rigid connection mode, and the flexible connection mode and rigid connection mode are set in real time according to the actual structural stability connection requirements of the energy-saving centrifugal fan and the corrosion protection requirements of the installation location.

6. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 1, characterized in that: The point screening information includes the thickness of the gasket that needs to be increased when the ground level corresponding to the installation point is adjusted to the same level as the fan installation level, the speed at which the excess load corresponding to the installation point and the maximum load of the fan are reduced, and the excess amount of the maximum span value of the real-time installation area environmental parameters that is affected by the floating value that exceeds the maximum value of the corresponding fan adaptation environmental parameter range.

7. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 6, characterized in that: If the screening analysis coefficient of the installation point exceeds the screening analysis coefficient threshold, the real-time installation point is marked as a non-adaptive point; if the screening analysis coefficient of the installation point does not exceed the screening analysis coefficient threshold, the real-time installation point is marked as an adaptive point.

8. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 1, characterized in that: The startup monitoring data and operation monitoring data are respectively the instantaneous increase span of the vibration amplitude of the fan components corresponding to the startup phase of the energy-saving centrifugal fan during the trial operation period, and the delay span of the decrease speed of the real-time vibration amplitude of the fan body to the amplitude threshold during the continuous operation phase of the energy-saving centrifugal fan during the trial operation period.

9. The method for designing a flexible installation of an energy-saving centrifugal fan according to claim 8, characterized in that: If the startup monitoring data exceeds the startup instantaneous increase span threshold, or the operation monitoring data exceeds the decrease speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is high; If the startup monitoring data does not exceed the startup instantaneous increase span threshold, and the operation monitoring data does not exceed the decrease speed delay span threshold, it is inferred that the vibration impact of the current energy-saving centrifugal fan is low.

10. A centrifugal fan, characterized in that: A flexible installation design method for an energy-saving centrifugal fan applied to any one of claims 1 to 9 above.

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