Sealing baffle customization design method and system based on multivariate correction model

Abstract

The application discloses a sealing labyrinth customized design method and system based on a multivariate correction model, and belongs to the technical field of aero-engines. The method first defines a flow capacity calculation model, and constructs a comprehensive flow coefficient multivariate correction model containing a kinetic energy transmission coefficient, a labyrinth inclination correction coefficient, a honeycomb correction coefficient, a tooth cavity correction coefficient, a step correction coefficient and the like. Then, design input including working condition parameters, geometric constraints and expected leakage flow is given. A plurality of sets of labyrinth parameter combinations are generated within the geometric constraint range, and the leakage flow is calculated by substituting the labyrinth parameter combinations into the model. The parameter combinations satisfying the expected leakage flow requirement are screened, a candidate configuration set is formed, and output is performed. The application can quickly generate labyrinth parameter combinations satisfying the leakage flow requirement according to the expected sealing performance at the early design stage, significantly reduces trial and error iteration, and improves design efficiency.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine technology, and relates to the design of aero-engine air systems, and particularly to a method and system for custom design of sealing grates based on a multivariable correction model. Background Technology

[0002] In aero engines, the air system is responsible for drawing air from the compressor to meet functional requirements such as cooling, sealing, and axial force balance. The toothed sealing structure is a key component in the air system's flow path, and its sealing performance directly affects the engine's fuel consumption rate and overall performance. Studies have shown that excellent sealing technology can reduce fuel consumption by 10% and NOx emissions by more than 50%.

[0003] Existing flute sealing design technologies mainly follow two paths: one is to study the influence of flute geometry parameters on sealing performance through experiments or computational fluid dynamics (CFD) simulations, revealing its sealing mechanism; the other is to optimize the flute profile parameters based on a given initial configuration using numerical simulation, multidisciplinary optimization algorithms, and other methods to obtain better sealing performance. For example, patent CN116150893A discloses a method that pre-designs a "beak-shaped" flute with a specific curved profile, and then uses CFD simulation to perform parametric analysis and optimization of the profile and inclination of the windward side of a single tooth.

[0004] However, all the aforementioned existing technologies share a common drawback: they cannot provide a forward-looking configuration scheme for the sealing grates at the initial design stage of an aero-engine. These methods heavily rely on tedious later-stage CFD simulation trial-and-error or optimization iterations, resulting in long design cycles. Furthermore, once air system requirements change, the design scheme often needs repeated modifications or even complete overhaul, severely restricting engine development efficiency. Therefore, there is an urgent need in this field for a design method that can quickly and forward-lookingly generate the grating configuration based solely on given sealing performance indicators and operating conditions at the initial design stage. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and system for custom design of sealing grates based on a multivariable correction model, so as to realize forward design from performance requirements to configuration schemes and significantly improve the design efficiency of aero-engine air systems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a method for custom design of sealing ferrules based on a multivariate correction model, comprising the following steps: Step S100: Define a circulation capacity calculation model, the model including: Leakage flow calculation formula:

[0008] and the comprehensive flow coefficient based on the multivariate correction model Calculation formula:

[0009] In the formula, To prevent leakage of the ferrule, To seal the flow area of ​​the comb teeth, To seal the pressure in the upstream cavity of the comb teeth, To seal the temperature of the cavity upstream of the comb teeth, To ensure the overall flow coefficient of the sealed grating, The kinetic energy transfer coefficient, This is the correction factor for the tooth inclination angle. This is the cellular correction factor. This is the tooth cavity correction factor. This is the step correction factor. For speed correction factor, This is the temperature correction factor. For experimental correction factors, The tooth tip flow coefficient; Step S200: Given design input, the design input includes at least the upstream cavity pressure of the sealing tooth. , seal the upstream cavity temperature of the dental floss , seal the downstream cavity pressure of the comb teeth , sealing the rotational speed of the comb-tooth rotor The spatial geometric constraints of the sealing tooth position, and the expected leakage flow rate of the sealing tooth. ; Step S300, parameterized design of the grates, includes generating multiple sets of grate geometric parameter combinations within the range defined by the geometric constraint information, and substituting each set of parameters into the flow capacity calculation model to calculate the corresponding leakage flow rate. ; Step S400: Flow capacity assessment, filtering out all those that meet the requirements. The combination of ferrule parameters is used as a candidate configuration set; Step S500: Output the candidate configuration set to form a customized design result for the sealing ferrule.

[0010] Step S300 includes: Step S310: Perform parametric design of the straight-through type grate, generate parameter combinations of the straight-through type grate and calculate leakage flow rate; Step S320: Perform parametric design of the stepped grates, generate parameter combinations of the stepped grates, and calculate leakage flow.

[0011] Furthermore, in steps S310 and S320, when combining parameters, the effective number of working teeth of the sealing tooth is used. The main variable is the gap between the tooth tips of the sealing tooth. As a secondary variable, and within the constraints of the geometric constraint information, No more than 6 Not less than 0.2mm, and The step value is 0.2mm or 0.5mm.

[0012] Furthermore, the comprehensive flow coefficient The correction coefficients in the model are determined by the following model: The kinetic energy transfer coefficient for:

[0013]

[0014]

[0015] The tooth tilt angle correction coefficient When the sieve teeth are straight through teeth:

[0016] When the teeth are stepped teeth: ; The cellular correction coefficient When the sealing pair is a honeycomb structure, it is based on the width of the sealing comb tooth tips. Standard honeycomb lattice size and seal the gap between the tooth tips of the comb Determined by empirical formulas; The tooth cavity correction coefficient Based on the height of the sealed tooth cavity Distance between the tips of the sealing comb teeth The piecewise function of the ratio is determined; The step correction coefficient When the grates are stepped grates, the height difference of the stepped grates determines the... Distance between the tips of the sealing comb teeth The piecewise function of the ratio is determined; when the grates are straight-through grates, ; in, To seal the distance between the tooth tips of the comb, To seal the width of the comb teeth, To seal the gap between the tips of the comb teeth, To ensure the effective number of working teeth of the dental fracturing are sealed, To seal the angle of the comb teeth, The interstitial ratio of the honeycomb lattice. The height difference of the stepped grating teeth, This is the tilt angle correction factor calculated based on the straight-through teeth.

[0017] Furthermore, the cellular correction coefficient Determined by the following model: When the grating teeth are straight grating teeth and the sealing assembly has a honeycomb structure:

[0018] When the teeth are stepped teeth and the sealing pair is a honeycomb structure:

[0019] When the toothed sealing assembly has a coated structure and no honeycomb structure: .

[0020] Furthermore, the tooth cavity correction coefficient Determined by the following piecewise function: when hour:

[0021] when hour:

[0022] in, To seal the height of the tooth cavity, To seal the distance between the tips of the comb teeth.

[0023] Furthermore, when the teeth are stepped teeth, the step correction coefficient... Determined by the following piecewise function: like ,but ; like ,but .

[0024] Secondly, the present invention provides a custom design system for sealing grates based on a multivariate correction model, comprising: The model definition module is used to define the flow capacity calculation model and includes built-in leakage flow. and the comprehensive flow coefficient based on the multivariate correction model The calculation formula; The input module is used to receive a given design input, which includes at least the upstream cavity pressure of the sealing grate, the upstream cavity temperature of the sealing grate, the downstream cavity pressure of the sealing grate, the rotor speed of the sealing grate, the spatial geometric constraint information of the sealing grate position, and the expected leakage flow rate of the sealing grate. The parameter generation and calculation module is used to generate multiple sets of grating geometric parameter combinations within the range defined by the geometric constraint information, and call the model definition module to calculate the leakage flow corresponding to each set of parameter combinations. The judgment and filtering module is used to filter out the combination of grating parameters that meet the expected leakage flow conditions and output them as a set of candidate configurations.

[0025] Furthermore, the parameter generation and calculation module and the judgment and filtering module are configured to achieve automated iteration, calculation and filtering through optimization software.

[0026] Furthermore, when combining parameters, the parameter generation and calculation module uses the effective number of working teeth of the sealing tooth as the reference. The main variable is the gap between the tooth tips of the sealing tooth. As a secondary variable, and within the range defined by the geometric constraint information, No more than 6 Not less than 0.2mm, and The step value is 0.2mm or 0.5mm.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This invention, through parametric modeling and multivariate combination calculation, can directly generate the tooth configuration based on sealing requirements in the initial design stage, enabling forward customized design and breaking the limitations of traditional methods that rely on later CFD iterations.

[0028] 2. This invention introduces a multivariate correction model that includes kinetic energy transfer, tilt angle, honeycomb, tooth cavity, and step, comprehensively considering the physical effects affecting the sealing performance of the tooth. Compared with a single simplified model or CFD simulation, it can achieve accurate prediction of the sealing performance of multiple schemes in a very short time.

[0029] 3. This invention provides differentiated design paths for straight-through and stepped grates, and incorporates design criteria based on manufacturability and reliability experience (such as limiting the upper limit of the number of teeth, the lower limit of the clearance, and the optimal step length), so that the output design scheme simultaneously meets performance and engineering application requirements. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart illustrating the custom design method for sealing ferrules based on a multivariate correction model, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of geometric input in an embodiment of the present invention; Figure 3 This is a schematic diagram of the dimensional parameters of the straight-through type straight tooth in an embodiment of the present invention; Figure 4 This is a schematic diagram of the dimensional parameters of the straight-through oblique tooth in an embodiment of the present invention; Figure 5 This is a schematic diagram of the dimensional parameters of the stepped straight toothed comb in an embodiment of the present invention; Figure 6 This is a schematic diagram of the dimensional parameters of the stepped oblique teeth in an embodiment of the present invention; Figure 7 This is a schematic diagram of the cell size parameters in an embodiment of the present invention; Figure 8 This is a schematic diagram of the sealing comb configuration designed for an embodiment of the present invention. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] This invention provides a method for custom design of sealing grates based on a multivariate correction model. For example... Figure 1 As shown, the method includes the following steps: Step S100: Define flow capacity.

[0035] Specifically, a flow capacity calculation model is defined, which includes a leakage flow calculation formula and a comprehensive flow coefficient calculation formula based on a multivariate correction model.

[0036] The formula for calculating leakage flow is:

[0037] in, To prevent leakage of the ferrule, To seal the flow area of ​​the comb teeth, To seal the pressure in the upstream cavity of the comb teeth, To seal the temperature of the cavity upstream of the comb teeth, The overall flow coefficient for sealing the grates.

[0038] Sealing the flow area of ​​the comb teeth The calculation formula is as follows:

[0039] in, To seal the gap between the tips of the comb teeth, The radius of rotation of the tooth tip of the sealing comb.

[0040] Sealing Grate Overall Flow Coefficient It consists of a multivariate modified model, and its calculation formula is as follows:

[0041] in, The kinetic energy transfer coefficient, This is the correction factor for the tooth inclination angle. This is the cellular correction factor. This is the tooth cavity correction factor. This is the step correction factor. For speed correction factor, This is a temperature correction factor. For experimental correction factors, This represents the tip flow coefficient. Each correction coefficient in this model is used to capture a specific physical effect, and the specific empirical model is constructed as follows: Kinetic energy transfer coefficient This reflects the throttling and kinetic energy carrying effect of the gas by the tips of the comb teeth.

[0042]

[0043]

[0044]

[0045] in, To seal the distance between the tooth tips of the comb, To seal the width of the comb teeth, To seal the gap between the tips of the comb teeth, To ensure the effective number of working teeth of the comb, the comb is defined as follows: ; The reference value for the kinetic energy coefficient of the sealing tooth is 1. The reference value for the kinetic energy coefficient of the sealing tooth is 2.

[0046] Tooth Inclination Correction Factor Used to correct the angle of the sealing teeth. The combined effects of honeycomb structure and flow.

[0047] When the comb teeth are straight comb teeth:

[0048] in, The interstitial gap ratio of the honeycomb lattice; For standard honeycomb lattice sizes, such as Figure 7 As shown; To seal the angle of the comb teeth. Preferably, , .

[0049] When the teeth are stepped teeth:

[0050] in, This is the tilt angle correction factor calculated based on the straight-through teeth.

[0051] Cellular correction factor Used to enhance the sealing effect when the sealing pair is a honeycomb structure.

[0052] When the grating teeth are straight grating teeth and the sealing assembly has a honeycomb structure:

[0053] When the teeth are stepped teeth and the sealing pair is a honeycomb structure:

[0054] When the toothed sealing assembly has a coated structure and no honeycomb structure: .

[0055] Tooth cavity correction factor Used to correct the aspect ratio of the sealing tooth cavity. The effect on the dissipation effect within the cavity.

[0056] when hour:

[0057] when hour:

[0058] in, To seal the height of the tooth cavity, To seal the distance between the tips of the comb teeth.

[0059] Step correction factor Used to correct the flow expansion effect caused by the steps in stepped grates.

[0060] When the teeth are stepped teeth: like ,but ; like ,but .in, The difference in height between the stepped teeth.

[0061] When the comb teeth are straight through comb teeth, .

[0062] Speed ​​correction factor With temperature correction factor Used to correct gas compressibility and wind resistance temperature rise.

[0063] Among them, the speed correction coefficient The calculation method is as follows:

[0064] In the formula, R is the gas constant. To seal the pressure in the downstream cavity of the comb teeth, The effective number of working teeth for sealing the comb.

[0065] Temperature correction factor The calculation method is as follows:

[0066] In the formula, The temperature rise of the sealing grate can be calculated based on the rotational speed of the sealing grate rotor. Specifically, it can be estimated during the preliminary design using the following method: When the comb teeth are straight comb teeth: or

[0067] When the teeth are stepped teeth: or

[0068] Tooth tip flow coefficient Determined by the size of the tooth tip.

[0069] The calculation method is as follows:

[0070] in, To seal the width of the comb teeth, To seal the gap between the tooth tips of the comb; its value range is constrained within the interval [0.66, 0.83], when hour, ;when hour, .

[0071] Step S200: Given design input.

[0072] The design inputs for this step include at least the upstream cavity pressure of the sealing ferrule. , Seal the upstream cavity temperature of the dental floss , seal the downstream cavity pressure of the comb teeth , sealing the rotational speed of the comb-tooth rotor The spatial geometric constraints of the sealing tooth position, and the expected leakage flow rate of the sealing tooth. The spatial geometric constraints on the position of the sealing teeth, such as... Figure 2 As shown, this includes the geometric information xa, ya, and za of the location of the sealing teeth.

[0073] Specifically, the design requirements for a certain type of engine are defined, with the input parameter being: the pressure in the upstream cavity of the sealing grating. ; Seal the upstream cavity temperature of the comb teeth ; Seal the downstream cavity pressure of the comb teeth ; Seal the rotational speed of the comb-tooth rotor Geometric information of the location of the sealing teeth , , ; Expected leakage flow rate of sealing teeth .

[0074] Step S300: Parametric design of the tooth grates.

[0075] Step S310: Straight-through type tooth design.

[0076] Based on the above design inputs Figure 3 , Figure 4 The parameter set shown generates multiple combinations of straight-through tooth geometric parameters. All parameter variables should be within the constraints of geometric information xa, ya, and za. For efficient filtering, the following strategy is preferably used for parameter combination in this embodiment of the invention: Preferred fixed parameters: tooth profile angle , ; Seal the angle of the comb teeth ; Width of the sealed comb teeth ; Height of sealed tooth cavity The tooth cavity height-to-width ratio H / B=1; the tooth sealing pair adopts a honeycomb structure.

[0077] The effective number of working teeth of the sealing tooth The main variable is the gap between the tooth tips of the sealing tooth. This is a secondary variable. Based on engineering experience, under the aforementioned geometric constraints, 6, 0.2mm. The search step value is preferably set to 0.2 mm or 0.5 mm.

[0078] Substituting the above parameter combination into the flow capacity calculation model in step S100, a multivariate combination calculation is performed, and the calculation results of the straight-through type grating are shown in the table below:

[0079] Step S320: Stepped tooth design.

[0080] Based on the above design inputs Figure 5 , Figure 6 The parameter set shown generates multiple sets of geometric parameter combinations for the stepped tooth grates. All parameter variables should be within the constraints of the geometric information xa, ya, and za. An efficient parameter combination strategy is also employed. Preferred fixed parameters: tooth profile angle , ; Seal the angle of the comb teeth ; Width of the sealed comb teeth The height-to-width ratio of the steps The tooth cavity height-to-width ratio H / B=1; the tooth sealing pair adopts a honeycomb structure.

[0081] The effective number of working teeth of the sealing tooth The main variable is the gap between the tooth tips of the sealing tooth. This is a secondary variable. Based on engineering experience, under the aforementioned geometric constraints, 6, 0.2mm. The search step value is preferably set to 0.2 mm or 0.5 mm.

[0082] Substituting the above parameter combination into the flow capacity calculation model in step S100, and performing multivariate combination calculations, the calculation results of the stepped tooth section are shown in the table below:

[0083] Step S400: Circulation capacity assessment.

[0084] Based on the above calculation results, all those that satisfy the criteria are selected. The combinations of sieve tooth parameters are used as a set of candidate configurations. For example, in a stepped sieve, =0.45mm, =3mm solution ( =0.760) and =8.5mm, =6.7 mm, =2.3 mm scheme ( =0.655) are all valid candidate configurations. If so, return to step S200 and adjust the input conditions.

[0085] Step S500: Output the design results of the sealing grate configuration.

[0086] After obtaining the candidate configuration set, the following parameters are specified: sealing grate type (straight-through or stepped), number of sealing grate teeth, tooth tip distance, tooth tip width, tooth tip height, tooth tip gap, sealing grate inclination angle, height difference of stepped sealing grates, and sealing grate type (coated or honeycomb). The final selection is made based on engineering experience. In this embodiment of the invention, considering the high reliability brought by the large gap and honeycomb structure, the following configuration was ultimately determined: Figure 8 The sealing comb configuration shown: Type: Stepped helical teeth Number of teeth ( ): 5 Tooth tip gap ( ): 0.45 mm Tooth tip distance ( ): 8.5 mm Tooth cavity height ( ): 6.7 mm Tooth tip width ( ): 0.3 mm inclination( ): 15° Step height difference ( ): 2.3 mm Sealing type: honeycomb structure This configuration is directly generated by the forward custom design method described in this invention, without the need for subsequent CFD trial and error iteration.

[0087] By adding a strategy of generating parameter combinations using primary and secondary variables and specific step values, this invention can significantly reduce invalid calculations and further improve design efficiency while ensuring the integrity of the design space.

[0088] This invention also provides a custom design system for sealing grates based on a multivariate correction model, which is used to implement the above-described design method. The system includes the following modules: The model definition module is used to define the flow capacity calculation model and includes built-in leakage flow. and the comprehensive flow coefficient based on the multivariate correction model The calculation formula; specifically, the module has a built-in leakage flow rate. The calculation formula and the comprehensive flow coefficient Multivariate modified model Including kinetic energy transfer coefficient Correction factor for tooth inclination angle Cellular correction factor Tooth cavity correction factor Step correction factor Speed ​​correction coefficient Temperature correction factor Experimental correction factor and tooth tip flow coefficient The calculation logic is as follows: When the sealing pair is a honeycomb structure, this module automatically selects the corresponding honeycomb correction coefficient based on the type of grates (straight-through or stepped). The empirical formula; when the grating teeth are stepped grating teeth, the step correction factor is automatically applied. The module performs calculations using piecewise functions. It provides a unified interface that accepts geometric and operating parameters as input and returns the calculated leakage flow rate.

[0089] The input module is used to receive a given design input, which includes at least the upstream cavity pressure of the sealing tooth. , Seal the upstream cavity temperature of the dental floss , seal the downstream cavity pressure of the comb teeth , sealing the rotational speed of the comb-tooth rotor Spatial geometric constraints on the position of the sealing teeth (e.g.) Figure 2 The axial dimension xa, radial dimension ya, circumferential dimension za are shown, along with the expected leakage flow rate of the sealing grate. This module provides a graphical user interface or a parameter file import interface, allowing users to flexibly input their design requirements.

[0090] The parameter generation and calculation module is connected to the input module and the model definition module. It is used to generate multiple sets of grating geometric parameter combinations within the range defined by the geometric constraint information, and to call the model definition module to calculate the leakage flow corresponding to each parameter combination. Specifically, after receiving the geometric constraint information, this module automatically generates multiple sets of grating geometric parameter combinations within its defined spatial range, including but not limited to: the number of effective working teeth of the sealing grating. Seal the gap between the tooth tips of the comb. , sealing the distance between the tooth tips , sealing the height of the tooth cavity , sealing the angle of the comb teeth Stepped tooth height difference , width of sealed tooth tips Standard honeycomb lattice size The preferred operating mode of this module is: based on the effective number of working teeth of the sealing grates. The main variable is the gap between the tooth tips of the sealing tooth. As a secondary variable, and automatically limited within the stated geometric constraints. No more than 6 Not less than 0.2mm, and traversed in increments of 0.2mm or 0.5mm. The value of is determined by the parameter set. For each generated parameter combination, this module calls the calculation interface of the model definition module, inputs the current parameter combination and operating conditions, and obtains the corresponding leakage flow rate. The parameter combinations are then associated with the calculation results and stored to form a parameter-flow dataset.

[0091] The judgment and filtering module is used to filter out the combinations of grating parameters that meet the expected leakage flow conditions and output them as a set of candidate configurations. Specifically, it is connected to the parameter generation and calculation module. This module reads the parameter-flow dataset and calculates the expected leakage flow provided by the input module. Filtering based on thresholds will satisfy... All combinations of tooth parameters under the given conditions are extracted to form a candidate configuration set. When this set is empty, the judgment and filtering module can generate a prompt message to guide the user back to adjust the design input.

[0092] Furthermore, the parameter generation and calculation module and the judgment and filtering module can be configured to run on a commercial optimization software platform. Such commercial optimization software includes, but is not limited to, Isight, ModelCenter, and MATLAB. Through the loop control, data transmission, and result filtering functions provided by such software, the above-mentioned parameter generation, flow capacity calculation, and flow judgment are automated iteratively realized. The user only needs to provide initial input, and the system can automatically complete the entire calculation and filtering process and output the final candidate configuration set.

[0093] The output and display module is used to present the candidate configuration set obtained by the judgment and filtering module in a visual form. This module can output a complete parameter list for each candidate configuration, including the type of sealing grate (straight-through or stepped) and the number of sealing grate teeth. Tooth tip distance Tooth tip width Tooth cavity height Tooth tip gap , sealing the angle of the comb teeth Stepped sealing tooth height difference The module can sort and display the candidate set according to preset engineering preference rules, such as giving priority to configurations with "large gaps between grates and honeycomb structure", to help designers quickly determine the final solution.

[0094] The system described in this embodiment of the invention, by solidifying an experience-based multivariate correction model into an automatically invoked calculation module and integrating it with parameterized generation and automated screening functions, enables the rapid acquisition of a set of tooth configuration schemes that meet the requirements in the early stages of aero-engine design, requiring only the input of sealing performance indicators and installation space constraints, thus achieving true forward customized design.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for custom design of sealing ferrules based on a multivariate correction model, characterized in that, Includes the following steps: Step S100: Define a circulation capacity calculation model, the model including: Leakage flow calculation formula: and the comprehensive flow coefficient based on the multivariate correction model Calculation formula: In the formula, To prevent leakage of the ferrule, To seal the flow area of ​​the comb teeth, To seal the pressure in the upstream cavity of the comb teeth, To seal the temperature of the cavity upstream of the comb teeth, To ensure the overall flow coefficient of the sealed grating, The kinetic energy transfer coefficient, This is the correction factor for the tooth inclination angle. This is the cellular correction factor. This is the tooth cavity correction factor. This is the step correction factor. For speed correction factor, This is a temperature correction factor. For experimental correction factors, The flow coefficient at the tooth tip; The comprehensive flow coefficient The correction coefficients in the model are determined by the following model: The kinetic energy transfer coefficient for: The tooth tilt angle correction coefficient When the sieve teeth are straight through teeth: When the teeth are stepped teeth: ; The cellular correction coefficient When the grates are straight grates and the sealing assembly has a honeycomb structure: When the teeth are stepped teeth and the sealing pair is a honeycomb structure: When the toothed sealing assembly has a coated structure and no honeycomb structure: ; The tooth cavity correction coefficient ,when hour: when hour: The step correction coefficient When the grating teeth are stepped grating teeth, if ,but ;like ,but When the comb teeth are straight comb teeth, ; The speed correction coefficient for: The temperature correction factor for: The tooth tip flow coefficient for: Its value range is constrained to the interval [0.66, 0.83]. in, To seal the distance between the tooth tips of the comb, To seal the height of the tooth cavity, R is the gas constant. To seal the pressure in the downstream cavity of the comb teeth, To seal the width of the comb teeth, To seal the gap between the tips of the comb teeth, To ensure the effective number of working teeth of the dental fracturing are sealed, To seal the temperature rise of the comb teeth, To seal the angle of the comb teeth, The interstitial ratio of the honeycomb lattice. For standard honeycomb lattice size, The height difference of the stepped grating teeth, The tilt angle correction factor is calculated based on the straight-through teeth. Step S200: Given design input, the design input includes at least the upstream cavity pressure of the sealing tooth. , Seal the upstream cavity temperature of the dental floss , seal the downstream cavity pressure of the comb teeth , sealing the rotational speed of the comb-tooth rotor The spatial geometric constraints of the sealing tooth position, and the expected leakage flow rate of the sealing tooth. ; Step S300, parameterized design of the grates, includes generating multiple sets of grate geometric parameter combinations within the range defined by the geometric constraint information, and substituting each set of parameters into the flow capacity calculation model to calculate the corresponding leakage flow rate. ; Step S400: Flow capacity assessment, filtering out all those that meet the requirements. The combination of ferrule parameters is used as a candidate configuration set; Step S500: Output the candidate configuration set to form a customized design result for the sealing ferrule.

2. The method according to claim 1, characterized in that, Step S300 includes: Step S310: Perform parametric design of the straight-through type grate, generate parameter combinations of the straight-through type grate and calculate leakage flow rate; Step S320: Perform parametric design of the stepped grates, generate parameter combinations of the stepped grates, and calculate leakage flow.

3. The method according to claim 2, characterized in that, In steps S310 and S320, when combining parameters, the effective number of working teeth of the sealing tooth is used. The main variable is the gap between the tooth tips of the sealing tooth. As a secondary variable, and within the constraints of the geometric constraint information, No more than 6 Not less than 0.2mm, and The step value is 0.2mm or 0.5mm.

4. A custom design system for sealing grates based on a multivariate correction model, used to implement the method described in any one of claims 1-3, characterized in that, include: The model definition module is used to define the flow capacity calculation model and includes built-in leakage flow. and the comprehensive flow coefficient based on the multivariate correction model The calculation formula; The input module is used to receive a given design input, which includes at least the upstream cavity pressure of the sealing grate, the upstream cavity temperature of the sealing grate, the downstream cavity pressure of the sealing grate, the rotor speed of the sealing grate, the spatial geometric constraint information of the sealing grate position, and the expected leakage flow rate of the sealing grate. The parameter generation and calculation module is used to generate multiple sets of grating geometric parameter combinations within the range defined by the geometric constraint information, and call the model definition module to calculate the leakage flow corresponding to each set of parameter combinations. The judgment and filtering module is used to filter out the combination of grating parameters that meet the expected leakage flow conditions and output them as a set of candidate configurations.

5. The system according to claim 4, characterized in that, The parameter generation and calculation module and the judgment and filtering module are configured to achieve automated iteration, calculation and filtering through optimization software.

6. The system according to claim 4, characterized in that, When combining parameters, the parameter generation and calculation module uses the effective number of working teeth of the sealing tooth as the basis. The main variable is the gap between the tooth tips of the sealing tooth. As a secondary variable, and within the range defined by the geometric constraint information, No more than 6 Not less than 0.2mm, and The step value is 0.2mm or 0.5mm.

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