An automatic simulation analysis method for valve flow characteristics of regulating valves

Abstract

The present invention relates to the field of simulation analysis technology, and in particular to an automatic simulation analysis method for valve flow characteristics of a regulating valve, comprising step S1, obtaining valve parameters and fluid parameters; step S2, constructing a three-dimensional model of the valve; step S3, dividing cells; step S4, setting loading of a first fluid parameter; step S5, setting loading of a second fluid parameter; step S6, simulation calculation; step S7, obtaining the simulation parameter value for the simulation according to the simulation result and preliminarily determining whether the performance of the valve core meets the preset standard according to the simulation parameter value; step S8, analyzing again according to the simulation result of the model loaded with the second fluid parameter and comparing with the simulation result of the model loaded with the first fluid parameter, and determining whether the performance of the valve meets the preset standard according to the comparison result. The present invention improves the monitoring accuracy of valve performance.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation analysis, and in particular to an automatic simulation analysis method for valve flow characteristics of a regulating valve. Background Art

[0002] With the continuous expansion of the application field of valve products, the development of new valves faces the challenges of long cycle, high cost and difficult to guarantee performance. To solve these problems, computer simulation technology has gradually become an important means of studying system characteristics since the 1940s. The use of computers for model testing not only provides great flexibility and convenience, but also makes the solution of mathematical models more accurate and fast. Especially in valve design, computer simulation is particularly suitable for solving large-scale, difficult to analyze and uncertain system problems. Therefore, the automatic simulation method of valves came into being. By building a virtual valve system model and simulating the operation process of the valve in a computer environment, the effective evaluation and optimization of valve performance can be achieved. This technology can significantly reduce development costs, shorten development cycles, and improve the performance indicators of new valves.

[0003] Chinese patent application publication number: CN113255185A discloses a method for automatic simulation of valve regulation characteristics, including the following steps: S1, establish a three-dimensional model of the valve; S2, import the three-dimensional model of the valve into the model module, and create valve opening parameters and a three-dimensional model of the fluid domain; S3, meshing, and generating a mesh file; S4, enter the solution module, set the fluid medium, turbulence model, solver and solution control parameters; and create output parameters; S5, enter the parameter set module, set multiple opening parameters required for simulation of the valve regulation characteristics, and solve and calculate the output parameters; S6, after the solution is completed, read the parameter values ​​of each valve opening in the parameter set module, including the valve opening parameter value and the output parameter; S7, calculate the flow coefficient of each opening according to the flow coefficient calculation formula, and draw a valve regulation characteristic curve. This solution reduces the simulation operation time and labor intensity of the simulation personnel and improves the efficiency of the simulation.

[0004] It can be seen that the automatic simulation method of valve regulation characteristics has the following problems: this method establishes a model based on the parameters of the valve and the fluid, outputs the relationship between the valve opening stroke and the fluid flow rate when the fluid passes through the valve, and draws a valve regulation characteristic curve. However, this method lacks monitoring of whether the corresponding relationship between the valve opening stroke and the fluid flow rate when the fluid flows through the valve meets the preset standards, and the performance monitoring accuracy of the valve is low. Summary of the invention

[0005] To this end, the present invention provides an automatic simulation analysis method for valve flow characteristics of a regulating valve, so as to overcome the problem of low valve monitoring accuracy in the prior art.

[0006] To achieve the above object, the present invention provides a method for automatically simulating and analyzing valve flow characteristics of a regulating valve, which is characterized by comprising:

[0007] Acquire valve parameters and fluid parameters, and determine modeling parameters of the valve and modeling parameters of the fluid respectively according to the valve parameters and the fluid parameters, wherein the modeling parameters of the valve include valve core cross-sectional profile parameters, the ratio of the fluid channel diameter to the valve core channel diameter, and valve core stroke actuator parameters, and the modeling parameters of the fluid include fluid temperature, fluid viscosity, and fluid pressure range;

[0008] Complete the construction of the three-dimensional model of the valve according to the valve modeling parameters and import the three-dimensional model of the valve into the fluid simulation software;

[0009] Set the cell division parameters of the valve and complete the cell division of the valve 3D model;

[0010] Setting a first loading fluid parameter to be loaded into the valve three-dimensional model, wherein the first loading fluid parameter includes a fluid temperature, a fluid viscosity, and a minimum value of a fluid pressure range;

[0011] Setting a second loading fluid parameter, wherein the first loading fluid parameter includes a maximum value of a fluid temperature, a fluid viscosity, and a fluid pressure interval;

[0012] Complete simulation calculation based on the first loading fluid parameter and output simulation results, wherein the simulation results include a cross-sectional profile result of the valve core and a relative flow change result of the valve caused by a unit stroke change of the valve core;

[0013] When obtaining the target flow execution deviation according to the simulation result and determining that the analysis under the first simulation strategy does not meet the preset standard according to the target flow execution deviation, determining the reason for not meeting the preset standard according to the stroke execution rate, or determining the adjustment method of the valve core cross-section profile parameter;

[0014] When the analysis under the first simulation strategy meets the preset standard, it is determined whether the performance of the valve meets the preset standard based on the simulation result of the second loading fluid parameter.

[0015] Furthermore, the cross section of the valve core is symmetrical along the center line, and a rectangular coordinate system is established with the lowest point of the cross section as the origin, and the shape of the cross section curve is determined by the formula, setting:

[0016] x 2 =2py

[0017] Wherein, p represents the maximum radius of the valve core cross section, x represents the abscissa of any point on the valve core cross section curve, and y represents the ordinate of any point on the valve core cross section curve.

[0018] Furthermore, the target flow execution deviation is an absolute value of a difference between a relative flow change of the valve caused by a unit stroke change of the valve core and a preset relative flow change of the valve.

[0019] Further, the process of determining whether the analysis of the valve based on the first simulation strategy meets the preset standard based on the target flow execution deviation includes:

[0020] Comparing the target flow execution deviation with a first preset target flow execution deviation and a second preset target flow execution deviation respectively;

[0021] Under the condition that the target flow execution deviation is less than or equal to the first preset target flow execution deviation, determining that the analysis of the valve based on the first simulation strategy meets the preset standard and performing analysis under the second simulation strategy;

[0022] Under the condition that the target flow execution deviation is greater than the first preset target flow execution deviation and less than or equal to the second preset target flow execution deviation, it is determined that the valve does not meet the preset standard based on the analysis of the first simulation strategy, and the reason for not meeting the preset standard is determined according to the stroke execution rate;

[0023] Under the condition that the target flow execution deviation is greater than the second preset target flow execution deviation, it is determined that the valve does not meet the preset standard based on the analysis of the first simulation strategy and the adjustment method of the valve core cross-sectional profile parameters is determined.

[0024] Furthermore, the adjustment method of the valve core cross-sectional profile parameters includes:

[0025] If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is less than zero, then increasing the maximum radius of the cross section of the valve core based on the comparison result with the preset negative difference;

[0026] If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is greater than zero, the maximum radius of the valve core cross section is reduced based on the comparison result of the preset positive difference.

[0027] Furthermore, a plurality of radius adjustment modes are provided for adjusting the maximum radius of the cross section of the valve core, and each radius adjustment mode has a different adjustment range for the maximum radius of the cross section of the valve core.

[0028] Further, the reason for not meeting the preset standard is determined according to the trip execution rate, wherein:

[0029] If the stroke execution rate is less than the preset stroke execution rate, it is determined that the size processing of the valve core stroke actuator does not meet the preset standard and the relative flow change value of the valve caused by the unit stroke change of the valve core is corrected according to the difference between the preset stroke execution rate and the stroke execution rate;

[0030] If the stroke execution rate is greater than a preset stroke execution rate, it is determined that the simulation accuracy of the valve model does not meet the preset standard and the division size of the cells of the valve three-dimensional model is reduced.

[0031] Furthermore, the correction amplitude of the relative flow rate change value of the valve caused by the unit stroke change of the valve core is positively correlated with the stroke execution rate difference, wherein the stroke execution rate difference is the difference between a preset stroke execution rate and the stroke execution rate.

[0032] Furthermore, the process of determining whether the performance of the valve meets the preset standard based on the analysis result under the second simulation strategy includes:

[0033] The absolute value of the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is recorded as a secondary deviation;

[0034] If the secondary deviation is less than or equal to the preset secondary deviation, it is determined that the performance of the valve meets the preset standard;

[0035] If the secondary deviation is greater than the preset secondary deviation and the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is greater than zero, it is determined that the performance of the valve does not meet the preset standard and the ratio of the fluid channel diameter to the valve core channel diameter is reduced.

[0036] Furthermore, a plurality of ratio adjustment methods are provided for the ratio of the fluid channel diameter to the valve core channel diameter, and each ratio adjustment method has a different adjustment range for the valve core channel diameter.

[0037] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention establishes a model by acquiring valve parameters and fluid parameters to simulate whether the ratio of the relative opening stroke of the valve and the relative flow rate of the fluid when the fluid flows through the valve meets the preset standards, thereby determining whether the performance of the valve meets the preset standards, and adjusting the parameters of valves that do not meet the preset standards, thereby improving the monitoring accuracy of the valve performance; the pressure of the fluid will change, and repeated simulations are performed on the same fluid at different pressures. By comparing the simulation results, the performance of the valve is judged again and the parameters are adjusted for situations that do not meet the preset standards, thereby further improving the monitoring accuracy of the valve performance.

[0038] Furthermore, the present invention quantifies the cross-section of the valve core by representing the cross-section with a curve function, which is more conducive to accurately adjusting the cross-sectional shape of the valve core, providing accurate data for monitoring valve performance, thereby improving the monitoring accuracy of valve performance.

[0039] Furthermore, the present invention calculates the target flow execution deviation based on the simulation results for the equal percentage characteristics of the valve and determines whether the performance of the valve meets the preset standard based on this. The error is quantified and intuitively represented to facilitate adjustment of the corresponding parameters, thereby improving the monitoring accuracy of the valve performance.

[0040] Furthermore, the present invention determines whether the performance of the valve meets the preset standard based on the comparison result of the target flow execution deviation and the preset target flow execution deviation, adjusts the parameters for the situation that does not meet the preset standard, and verifies the second simulation strategy for the situation that meets the preset standard, thereby improving the monitoring accuracy of the valve performance.

[0041] Furthermore, the present invention provides different adjustment methods for the positive and negative situations of the difference. When the difference is less than 0, it indicates that the valve core is too small and the sensitivity to the change of the valve opening stroke is too low, and the cross-sectional radius needs to be increased. When the difference is greater than 0, it indicates that the valve core is too large and the sensitivity to the change of the valve opening stroke is too high, and the cross-sectional radius needs to be reduced. Several cross-sectional radius adjustment methods are provided according to the degree of deviation of the difference from 0, thereby improving the monitoring accuracy of the valve core.

[0042] Furthermore, the present invention determines the reason why the performance of the valve does not meet the preset standard based on the comparison result of the valve stroke execution rate and the preset stroke execution rate, and sets the parameter adjustment method based on the determined reason, thereby improving the monitoring accuracy of the valve performance.

[0043] Furthermore, the present invention verifies the valve performance under the second simulation strategy based on the secondary deviation based on the situation that the valve performance under the first simulation strategy meets the preset standard, tests the valve performance under the condition that the fluid pressure changes, and sets the adjustment method of the valve core channel diameter for the situation that the valve performance under the second simulation strategy does not meet the preset standard, thereby improving the monitoring accuracy of the valve performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a flow chart of a method for automatic simulation and analysis of valve flow characteristics of a regulating valve according to an embodiment of the present invention;

[0045] Figure 2 A flowchart of an analysis of determining a first simulation strategy according to an embodiment of the present invention;

[0046] Figure 3 A flow chart for determining a trip execution rate according to an embodiment of the present invention;

[0047] Figure 4 This is a flow chart of determining valve performance based on analysis results under the second simulation strategy according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0051] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a flow chart of a method for automatic simulation and analysis of valve flow characteristics of a regulating valve according to an embodiment of the present invention; a flow chart of an analysis based on a first simulation strategy according to an embodiment of the present invention; a flow chart of determining a stroke execution rate according to an embodiment of the present invention; and a flow chart of determining valve performance based on analysis results under a second simulation strategy according to an embodiment of the present invention.

[0053] An automatic simulation analysis method for valve flow characteristics of a regulating valve according to an embodiment of the present invention is characterized by comprising:

[0054] Acquire valve parameters and fluid parameters, and determine modeling parameters of the valve and modeling parameters of the fluid respectively according to the valve parameters and the fluid parameters, wherein the modeling parameters of the valve include valve core cross-sectional profile parameters, the ratio of the fluid channel diameter to the valve core channel diameter, and valve core stroke actuator parameters, and the modeling parameters of the fluid include fluid temperature, fluid viscosity, and fluid pressure range;

[0055] Complete the construction of the three-dimensional model of the valve according to the valve modeling parameters and import the three-dimensional model of the valve into the fluid simulation software;

[0056] Set the cell division parameters of the valve and complete the cell division of the valve 3D model;

[0057] Setting a first loading fluid parameter to be loaded into the valve three-dimensional model, wherein the first loading fluid parameter includes a fluid temperature, a fluid viscosity, and a minimum value of a fluid pressure range;

[0058] Setting a second loading fluid parameter, wherein the first loading fluid parameter includes a maximum value of a fluid temperature, a fluid viscosity, and a fluid pressure interval;

[0059] Complete simulation calculation based on the first loading fluid parameter and output simulation results, wherein the simulation results include a cross-sectional profile result of the valve core and a relative flow change result of the valve caused by a unit stroke change of the valve core;

[0060] When obtaining the target flow execution deviation according to the simulation result and determining that the analysis under the first simulation strategy does not meet the preset standard according to the target flow execution deviation, determining the reason for not meeting the preset standard according to the stroke execution rate, or determining the adjustment method of the valve core cross-section profile parameter;

[0061] When the analysis under the first simulation strategy meets the preset standard, it is determined whether the performance of the valve meets the preset standard based on the simulation result of the second loading fluid parameter.

[0062] Specifically, the fluid pressure range in the embodiment of the present invention is not specifically limited, and is based on the actual change range of the fluid pressure that needs to be simulated.

[0063] Specifically, in the embodiment of the present invention, the change in the relative flow rate of the valve caused by the unit stroke change presents an equal percentage characteristic. For example, when the stroke changes by 10%, the relative flow rate of the valve changes by 10%.

[0064] Specifically, the cross section of the valve core is symmetrical along the center line. A rectangular coordinate system is established with the lowest point of the cross section as the origin and the shape of the cross section curve is determined by the formula. Set:

[0065] x 2 =2py

[0066] Wherein, p represents the maximum radius of the valve core cross section, x represents the abscissa of any point on the valve core cross section curve, and y represents the ordinate of any point on the valve core cross section curve.

[0067] Specifically, the range of x is [-20mm, 20mm].

[0068] Specifically, the target flow execution deviation is the absolute value of the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve.

[0069] Specifically, the process of determining whether the analysis of the valve based on the first simulation strategy meets the preset standard based on the target flow execution deviation includes:

[0070] Compare the target flow execution deviation with a first preset target flow execution deviation of 0.1% and a second preset target flow execution deviation of 0.3% respectively;

[0071] Under the condition that the target flow execution deviation is less than or equal to 0.1% of the first preset target flow execution deviation, it is determined that the analysis of the valve based on the first simulation strategy meets the preset standard and an analysis under the second simulation strategy is performed;

[0072] Under the condition that the target flow execution deviation is greater than the first preset target flow execution deviation 0.1% and less than or equal to the second preset target flow execution deviation 0.3%, it is determined that the valve does not meet the preset standard based on the analysis of the first simulation strategy and the stroke execution rate is determined;

[0073] Under the condition that the target flow execution deviation is greater than the second preset target flow execution deviation by 0.3%, it is determined that the valve does not meet the preset standard based on the analysis of the first simulation strategy and the adjustment method of the valve core cross-sectional profile parameters is determined.

[0074] Specifically, the adjustment method of the valve core cross-sectional profile parameters includes:

[0075] If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is less than zero, then increasing the maximum radius of the cross section of the valve core based on the comparison result with the preset negative difference;

[0076] If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is greater than zero, the maximum radius of the valve core cross section is reduced based on the comparison result of the preset positive difference.

[0077] Specifically, several radius adjustment methods are provided for adjusting the maximum radius of the cross section of the valve core, and each radius adjustment method has a different adjustment range for the maximum radius of the cross section of the valve core.

[0078] Specifically, the process of adjusting the maximum radius of the valve core cross section includes:

[0079] Calculate the difference between the relative flow change of the valve and the relative flow change of the preset valve;

[0080] If the difference is less than or equal to the first preset negative difference -0.1% and greater than the second preset negative difference -0.2%, the maximum radius p of the valve core cross section is corrected using the first radius correction coefficient 1.1;

[0081] If the difference is less than or equal to the second preset difference -0.2% and greater than the third preset negative difference -0.3%, the second radius correction coefficient 1.2 is used to correct the maximum radius p of the valve core cross section;

[0082] If the difference is greater than or equal to the first preset positive difference of 0.1% and less than the second preset positive difference of 0.2%, the third radius correction coefficient of 0.9 is used to correct the maximum radius p of the valve core cross section;

[0083] If the difference is greater than or equal to the first preset positive difference of 0.2% and less than the third preset positive difference of 0.3%, the fourth radius correction coefficient of 0.8 is used to correct the maximum radius p of the valve core cross section.

[0084] Specifically, the reasons for not meeting the preset standards are determined based on the trip execution rate, among which:

[0085] If the stroke execution rate is less than 98% of the preset stroke execution rate, it is determined that the size processing of the valve core stroke actuator does not meet the preset standard and the relative flow change value of the valve caused by the unit stroke change of the valve core is corrected according to the difference between the preset stroke execution rate and the stroke execution rate;

[0086] If the stroke execution rate is greater than a preset stroke execution rate of 98%, it is determined that the simulation accuracy of the valve model does not meet the preset standard and the division size of the cells of the valve three-dimensional model is reduced.

[0087] Specifically, the correction amplitude of the relative flow rate change value of the valve caused by the unit stroke change of the valve core is positively correlated with the stroke execution rate difference, wherein the stroke execution rate difference is the difference between a preset stroke execution rate and the stroke execution rate.

[0088] Specifically, the correction amplitude of the relative flow change value of the valve caused by the unit stroke change of the valve core is positively correlated with the stroke execution rate difference, for example, a linear positive correlation. There is no specific limitation. Those skilled in the art can know that the larger the stroke execution rate difference is, the larger the correction amplitude of the relative flow change value of the valve caused by the unit stroke change of the valve core is.

[0089] Specifically, the process of determining whether the performance of the valve meets the preset standard based on the analysis result under the second simulation strategy includes:

[0090] The absolute value of the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is recorded as a secondary deviation;

[0091] If the secondary deviation is less than or equal to a preset secondary deviation of 0.03%, it is determined that the performance of the valve meets the preset standard;

[0092] If the secondary deviation is greater than the preset secondary deviation of 0.03% and the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is greater than zero, it is determined that the performance of the valve does not meet the preset standard and the ratio of the fluid channel diameter to the valve core channel diameter is reduced.

[0093] Specifically, a plurality of ratio adjustment methods are provided for the ratio of the fluid channel diameter to the valve core channel diameter, and each ratio adjustment method has a different adjustment range for the valve core channel diameter.

[0094] Specifically, the ratio of the diameter of the fluid channel to the diameter of the valve core channel is recorded as the diameter ratio;

[0095] If the diameter ratio is less than or equal to the preset diameter ratio of 1.5, the passage diameter of the correction valve core is corrected by 0.95 using the first diameter ratio correction coefficient;

[0096] If the diameter ratio is greater than a preset diameter ratio of 1.5, the first diameter ratio correction coefficient is used to correct the passage diameter of the valve core by 0.9.

[0097] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for automatic simulation and analysis of valve flow characteristics of a regulating valve, characterized in that: include: Acquire valve parameters and fluid parameters, and determine modeling parameters of the valve and modeling parameters of the fluid respectively according to the valve parameters and the fluid parameters, wherein the modeling parameters of the valve include valve core cross-sectional profile parameters, the ratio of the fluid channel diameter to the valve core channel diameter, and valve core stroke actuator parameters, and the modeling parameters of the fluid include fluid temperature, fluid viscosity, and fluid pressure range; Complete the construction of the three-dimensional model of the valve according to the valve modeling parameters and import the three-dimensional model of the valve into the fluid simulation software; Set the cell division parameters of the valve and complete the cell division of the valve 3D model; Setting a first loading fluid parameter to be loaded into the valve three-dimensional model, wherein the first loading fluid parameter includes a fluid temperature, a fluid viscosity, and a minimum value of a fluid pressure range; Setting a second loading fluid parameter, wherein the second loading fluid parameter includes a maximum value of a fluid temperature, a fluid viscosity, and a fluid pressure range; Complete simulation calculation based on the first loading fluid parameter and output simulation results, wherein the simulation results include a cross-sectional profile result of the valve core and a relative flow change result of the valve caused by a unit stroke change of the valve core; When obtaining the target flow execution deviation according to the simulation result and determining that the analysis under the first simulation strategy does not meet the preset standard according to the target flow execution deviation, determining the reason for not meeting the preset standard according to the stroke execution rate, or determining the adjustment method of the valve core cross-section profile parameter; When the analysis under the first simulation strategy meets the preset standard, determining whether the performance of the valve meets the preset standard based on the simulation result of the second loading fluid parameter; The cross section of the valve core is symmetrical along the center line. A rectangular coordinate system is established with the lowest point of the cross section as the origin and the cross section curve shape is determined by the formula. Set: Wherein, p represents the maximum radius of the valve core cross section, x represents the abscissa of any point on the valve core cross section curve, and y represents the ordinate of any point on the valve core cross section curve; The target flow execution deviation is the absolute value of the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve; The process of determining whether the analysis of the valve based on the first simulation strategy meets the preset standard based on the target flow execution deviation includes: Comparing the target flow execution deviation with a first preset target flow execution deviation and a second preset target flow execution deviation respectively; Under the condition that the target flow execution deviation is less than or equal to the first preset target flow execution deviation, determining that the analysis of the valve based on the first simulation strategy meets the preset standard and performing analysis under the second simulation strategy; Under the condition that the target flow execution deviation is greater than the first preset target flow execution deviation and less than or equal to the second preset target flow execution deviation, it is determined that the valve does not meet the preset standard based on the analysis of the first simulation strategy, and the reason for not meeting the preset standard is determined according to the stroke execution rate; Under the condition that the target flow execution deviation is greater than the second preset target flow execution deviation, determining that the valve does not meet the preset standard based on the analysis of the first simulation strategy and determining the adjustment method of the valve core cross-sectional profile parameters; The adjustment method of the valve core cross-sectional profile parameters includes: If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is less than zero, then increasing the maximum radius of the cross section of the valve core based on the comparison result with the preset negative difference; If the difference between the relative flow change of the valve caused by the unit stroke change of the valve core and the preset relative flow change of the valve is greater than zero, the maximum radius of the valve core cross section is reduced based on the comparison result of the preset positive difference.

2. The automatic simulation analysis method for valve flow characteristics of a regulating valve according to claim 1, characterized in that: There are several radius adjustment methods for adjusting the maximum radius of the valve core cross section, and each radius adjustment method has a different adjustment range for the maximum radius of the valve core cross section.

3. The automatic simulation analysis method for valve flow characteristics of a regulating valve according to claim 2, characterized in that: The reasons for not meeting the preset standards are determined based on the trip execution rate, among which: If the stroke execution rate is less than the preset stroke execution rate, it is determined that the size processing of the valve core stroke actuator does not meet the preset standard and the relative flow change value of the valve caused by the unit stroke change of the valve core is corrected according to the difference between the preset stroke execution rate and the stroke execution rate; If the stroke execution rate is greater than a preset stroke execution rate, it is determined that the simulation accuracy of the valve model does not meet the preset standard and the division size of the cells of the valve three-dimensional model is reduced.

4. The automatic simulation analysis method for valve flow characteristics of a regulating valve according to claim 3, characterized in that: The correction amplitude of the relative flow rate change value of the valve caused by the unit stroke change of the valve core is positively correlated with the stroke execution rate difference, wherein the stroke execution rate difference is the difference between a preset stroke execution rate and the stroke execution rate.

5. The automatic simulation analysis method for valve flow characteristics of a regulating valve according to claim 4, characterized in that: The process of determining whether the performance of the valve meets the preset standard based on the analysis result under the second simulation strategy includes: The absolute value of the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is recorded as a secondary deviation; If the secondary deviation is less than or equal to the preset secondary deviation, it is determined that the performance of the valve meets the preset standard; If the secondary deviation is greater than the preset secondary deviation and the difference between the target flow execution deviation under the first simulation strategy and the target flow execution deviation under the second simulation strategy is greater than zero, it is determined that the performance of the valve does not meet the preset standard and the ratio of the fluid channel diameter to the valve core channel diameter is reduced.

6. The automatic simulation analysis method for valve flow characteristics of a regulating valve according to claim 5, characterized in that: Several ratio adjustment methods are provided for the ratio of the fluid channel diameter to the valve core channel diameter, and each ratio adjustment method has a different adjustment range for the valve core channel diameter.

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