A three-element proportional controller parameterization modeling method

Abstract

The application discloses a three-component proportional controller parameterization modeling method, and belongs to the technical field of controller parameterization modeling. The method realizes the collaborative driving design of the overall structure by establishing a parameterization system of active size, associated logic rule and passive size. Specifically, the parameterization modeling of six parts, i.e. a shell, a displacement rotor, a resistance and leakage rotor, a matching level, a transmission gear and a sliding bearing, is included. By defining a few core active sizes such as rotor radius, hub thickness and blade thickness, and based on geometric relationship and physical constraint, all passive sizes such as center distance, rotation chamber angle, gear tooth number, shell height ratio and the like are automatically calculated. The application overcomes the disadvantages of the traditional trial and error design method, can automatically update all models by modifying a small number of parameters, greatly improves the design efficiency and accuracy, guarantees the rotor matching precision and proportional control performance, and is convenient for realizing the rapid optimization and serialization of products.

Description

Technical Field

[0001] This invention belongs to the field of controller parametric modeling technology, and particularly relates to a method for parametric modeling of a three-component proportional controller. Background Technology

[0002] The ternary proportional controller is a core component of the ternary fuel supply system for underwater weapons. Its function is to achieve a precise ratio of the three fuel components to improve combustion efficiency. Figure 1 As shown, the three-component proportional controller consists of three sets of... Figure 2 The volumetric metering components shown are connected in parallel. The three components of the fuel enter the three sets of volumetric metering components from their respective supply lines. Because the three lines are coaxial and rotate at the same speed, the fuel volumetric flow rate ratio depends on the height ratio of the three sets of volumetric metering components and is not affected by the operating environment. Therefore, the three-component proportional controller can achieve precise proportioning of the three-component fuel over a large flow range without any feedback control.

[0003] The invention patent "A Method for Calculating Parameters of a Three-Component Proportional Controller" (ZL202510587938.6) realizes the calculation of key parameters and performance evaluation of a three-component proportional controller. However, the structural design of a three-component proportional controller is extremely complex, and its performance is highly dependent on the precise geometric fit between multiple components such as the leakage rotor, displacement rotor, housing, and transmission gears. Traditional design methods rely heavily on the personal experience of designers, employing trial and error and manual, iterative modifications, which have the following prominent drawbacks: First, the design cycle is lengthy, often taking several weeks from initial parameter determination to final drawing output; second, due to the large amount of manual calculation and drawing of dimensional parameters, dimensional chain errors and fit interferences are prone to occur, making it difficult to guarantee design consistency; third, the lack of a systematic parameter correlation model makes it difficult to quickly predict and iteratively optimize key performance indicators (such as proportions), limiting further improvement in product performance and application promotion. Therefore, how to construct a parametric design system that can automatically maintain the geometric and motion relationships of each component of the three-component proportional controller and quickly drive overall design updates, thereby achieving high-efficiency, high-precision, and high-performance design, remains a technical challenge that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a parametric modeling method for a three-component proportional controller to solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the specific technical solution of the parametric modeling method for a three-component proportional controller of the present invention is as follows:

[0006] A parametric modeling method for a three-component proportional controller includes the following steps:

[0007] S1, shell parameterized modeling, based on the displacement rotor and the radius of the leakage rotor and the hub radius of the three main dimensions, the passive size of the center distance, the rotation chamber angle and the length of the flow channel is determined through the geometric relationship, the accurate matching of the rotor and the optimization of the flow channel are realized;

[0008] S2, displacement rotor parameterized modeling, according to the blade thickness and the hub thickness of two main dimensions, the passive size of the blade wrap angle and the arc length is calculated;

[0009] S3, parameterized modeling of the leakage rotor, according to the thickness of the shaft hole edge and the radius of the shaft hole, the passive size of the blade arc length and the radius of the shaft hole is calculated, and the sealing and structural strength are ensured;

[0010] S4, parameterized modeling of the matching layer, the target ratio is mapped to the shell height ratio, and the ratio control accuracy is ensured;

[0011] S5, parameterized modeling of the transmission gear, the gear model is automatically generated based on the modulus of the main dimension, and the speed ratio of the displacement rotor and the leakage rotor is ensured;

[0012] S6, parameterized modeling of the sliding bearing, sharing the thickness of the shaft hole edge, the bearing and the rotor are cooperatively designed.

[0013] Further, the S1 comprises the following steps:

[0014] According to the specific structure and constraint of the volumetric metering component, the radius of the displacement rotor, the radius of the displacement rotor hub and the radius of the leakage rotor are determined as the main dimensions of the shell line;

[0015] Based on the isosceles right triangle relationship in the geometry of the two displacement rotors and the leakage rotor, the passive size correlation logic rule of the center distance between the two displacement rotors is obtained;

[0016] According to the meshing relationship of the displacement rotor and the leakage rotor, the passive size correlation logic rule of the center distance between the displacement rotor and the leakage rotor is obtained;

[0017] According to the uniform distribution of displacement rotor data to the rotation chamber angle, the passive size correlation logic rule of the rotation chamber angle of the displacement rotor is obtained;

[0018] Based on the speed ratio distribution of the displacement rotor and the leakage rotor to the rotation chamber angle, the passive size correlation logic rule of the rotation chamber angle of the leakage rotor is obtained;

[0019] The transition straight line length is calculated through the geometric relationship, and the passive size correlation logic rule of the transition straight line length between the two displacement rotors is obtained;

[0020] Based on the continuity equation of fluid, the inlet and outlet diameters are associated with the rotor size, and the passive size correlation logic rule of the shell inlet and outlet diameter is obtained;

[0021] Obtain the passive size correlation rule of the total length based on the length of the straight pipe section.

[0022] Further, the S2 includes the following steps:

[0023] According to the displacement rotor structure characteristics, the thickness of the displacement rotor blade and the thickness of the hub are taken as the active size, the blade shape is optimized through the trigonometric function and the geometric relationship, and the sealing and strength requirements of the rotor are met;

[0024] According to the thickness of the blade and the radius of the hub, the wrap angle is calculated, and the passive size correlation logic rule of the angle corresponding to the circular arc of the displacement rotor blade is obtained;

[0025] According to the wrap angle of the blade and the radius of the blade, the arc length is calculated, and the passive size correlation rule of the circular arc length of the displacement rotor blade is obtained;

[0026] The transmission shaft hole size is associated with the thickness of the hub, and the passive size correlation logic rule of the transmission shaft hole radius of the displacement rotor is obtained;

[0027] By adjusting the active size, the geometric model of the displacement rotor is automatically updated.

[0028] Further, the S3 includes the following steps:

[0029] According to the sealing function and structural strength of the leakage blocking rotor, the thickness of the transmission shaft hole edge of the leakage blocking rotor is taken as the active size, and the transmission shaft hole radius of the displacement rotor in step S2 is shared, a parameterized model of the leakage blocking rotor is established through a mathematical formula, and dynamic cooperation with the displacement rotor is ensured;

[0030] The transmission shaft hole radius of the leakage blocking rotor is consistent with that of the displacement rotor, and the passive size correlation logic rule of the transmission shaft hole radius of the leakage blocking rotor is obtained;

[0031] According to the sealing function of the leakage blocking rotor, it is ensured that the leakage blocking rotor can effectively seal the flow passage during rotation, and the passive size correlation logic rule of the blade arc length is obtained;

[0032] The thickness of the blade is associated with the size of the hub and the thickness of the transmission shaft hole edge, the rigidity and sealing property of the blade are ensured, and the passive size correlation rule of the thickness of the blade of the leakage blocking rotor is obtained;

[0033] The long side length and the short side length of the cylindrical section of the blade inlet of the leakage blocking rotor are obtained;

[0034] By adjusting the active size, the geometric model of the leakage blocking rotor is automatically updated.

[0035] Further, the S4 includes the following steps:

[0036] The proportional control of three groups of elements is directly mapped to the shell height, ensuring that the displacement ratio of the volumetric metering component is consistent with the design target, and obtaining the passive size correlation logic rule of the proportional control shell height;

[0037] According to the target proportional ratio, the reference height, the shell heights of the other two layers are calculated.

[0038] Further, the S5 comprises the following steps:

[0039] According to the transmission characteristics of the two displacement rotors and the leakage blocking rotor, the gear modulus is determined as the active size, the gear design is directly bound with the rotor geometry, and the passive size correlation logic rule of the displacement rotor gear teeth and the leakage blocking rotor gear teeth is obtained by combining the active size in step S1 and the preset speed ratio.

[0040] Further, the S6 comprises the following steps:

[0041] According to the strength requirement of the sliding bearing, the edge thickness of the bearing hole of the leakage blocking rotor in step S3 is shared as the active size, the collaborative design of the bearing and the rotor is realized, and the following passive size correlation logic rules are obtained:

[0042] The inner diameter of the sliding bearing;

[0043] The outer diameter of the sliding bearing;

[0044] The length of the sliding bearing is a fixed value;

[0045] The active size is adjusted through step S3, and the sliding bearing geometry model is automatically updated.

[0046] The three-element proportional controller parameterization modeling method has the following advantages:

[0047] (1) Efficient and automated design, significantly shortening the development cycle. By establishing a parameterization system of "active size-correlation logic rule-passive size", the simultaneous update of all related component models can be driven by modifying a few core parameters, which greatly improves the design efficiency.

[0048] (2) Ensure accurate and consistent design, significantly improve product performance. All passive sizes are automatically generated through preset accurate geometric and physical correlation rules, which fundamentally eliminates human calculation and drawing errors, thereby optimizing key dimensions such as rotor clearance and flow channel shape, effectively reducing internal leakage and improving proportional control accuracy, ensuring high performance and high reliability of the product.

[0049] (3) Engineers can quickly generate and compare multiple design schemes by adjusting a few active dimensions, and systematically analyze their impact on key performances such as structural strength and volumetric efficiency, thereby getting rid of the traditional "trial and error method" and realizing data-driven deep optimization.

[0050] (4) Drive rapid serialization and enhance market competitiveness. Based on the same set of parameterization logic, by adjusting the proportioning parameters and reference dimensions, a series of product models that meet different mixing ratios and flow requirements can be quickly derived, which greatly reduces the marginal cost of customization and serialization design, enabling enterprises to respond efficiently to diversified market demands. Attached Figure Description

[0051] Figure 1 This is a three-dimensional structural diagram of a three-component proportional controller in the prior art;

[0052] Figure 2 This is a schematic diagram of the housing structure dimensions of a three-component proportional controller in the prior art;

[0053] Figure 3 This is a schematic diagram of the displacement rotor structure dimensions of a three-component proportional controller in the prior art;

[0054] Figure 4 This is a schematic diagram of the leakage-blocking rotor structure dimensions of a three-component proportional controller in the prior art;

[0055] Figure 5 This is a flowchart illustrating a parametric modeling method for a three-component proportional controller according to the present invention.

[0056] Figure 6 This is a schematic diagram of the three-dimensional shell model of the parametric modeling of this invention;

[0057] Figure 7 This is a schematic diagram of the three-dimensional model of the displacement rotor using parametric modeling of the present invention;

[0058] Figure 8 This is a schematic diagram of the three-dimensional model of the leakage-blocking rotor using parametric modeling of the present invention;

[0059] Figure 9 This is a schematic diagram of the three-dimensional gear model using parametric modeling of the present invention;

[0060] Figure 10 This is a schematic diagram of the three-dimensional model of the sliding bearing using parametric modeling according to the present invention. Detailed Implementation

[0061] To better understand the purpose, structure, and function of this invention, the following detailed description of a parametric modeling method for a three-component proportional controller, in conjunction with the accompanying drawings, is provided.

[0062] likeFigures 1-10 As shown, the core of the parametric modeling method for a three-component proportional controller of the present invention lies in transferring core design parameters (active dimensions) to the geometric model of the entire component through a series of associative logic rules, thereby achieving parametric-driven design. Specifically, it includes the following steps:

[0063] S1. Parametric modeling of the shell: Based on three active dimensions—displacement rotor, leakage-blocking rotor radius, and hub radius—passive dimensions such as center distance, rotating chamber angle, and flow channel length are determined through geometric relationships to achieve precise rotor fit and flow channel optimization.

[0064] Determine the displacement rotor radius based on the specific structure and constraints of the volumetric metering component. R p Displacement rotor hub radius R ph Leakage-resistant rotor radius R z As the active dimension of the shell profile.

[0065] Based on the isosceles right triangle relationship in the geometry of the two-displacement rotor and the leakage-blocking rotor, the center distance between the two-displacement rotor was obtained. Passive size association logic rules:

[0066]

[0067] This ensures that the two-displacement rotors maintain precise alternating engagement with the leakage-blocking rotor during rotation, avoiding motion interference, guaranteeing a constant minimum clearance between the rotors, and reducing leakage and wear caused by clearance fluctuations.

[0068] Based on the meshing relationship between the displacement rotor and the leakage-blocking rotor, the center distance between the displacement rotor and the leakage-blocking rotor was obtained. a pz Passive size association logic rules:

[0069]

[0070] This ensures the effective meshing range of the rotor while minimizing the housing size.

[0071] The rotation chamber angle of the displacement rotor is obtained by evenly distributing the rotation chamber angle according to the displacement rotor data. Passive size association logic rules:

[0072]

[0073] in N p The number of displacement rotors ensures the symmetrical operation of the two displacement rotors, guarantees the uniformity and low pulsation of flow measurement, and improves the stability of the three-component proportional controller.

[0074] The rotation chamber angle of the leakage blocking rotor is obtained by allocating the rotation chamber angle based on the speed ratio (usually 2:1) between the displacement rotor and the leakage blocking rotor. Passive size association logic rules:

[0075]

[0076] in N z The speed ratio coefficient ensures that the leakage-blocking rotor seals and releases the flow channel at the correct phase, reducing internal leakage.

[0077] The transition line length between the two displacement rotor rotating chambers is obtained by calculating the transition line length using geometric relationships. L Passive dimension association logic rule 1:

[0078]

[0079] This associated dimensional logic rule optimizes the flow channel shape, ensuring a smooth transition in the housing flow channel, reducing fluid resistance and ensuring smooth flow.

[0080] Based on the fluid continuity equation, the inlet and outlet diameters are correlated with the rotor size to obtain the casing inlet and outlet diameters. R o Passive size association logic rules:

[0081]

[0082] This ensures that the inlet flow rate matches the rotor displacement, optimizes the inlet and outlet flow rates, and reduces flow losses.

[0083] Straight pipe section length L 2 is generally 15mm~20mm to ensure sufficient fluid flow and achieve the desired total length. L Passive size association rule of 3:

[0084]

[0085] Dynamic adjustment of rotor dimensions ensures the structural integrity of the housing and sufficient installation space.

[0086] The above passive dimension association rules tightly integrate the rotor's motion geometry with the casing flow channel design, ensuring rotor fit accuracy and flow optimization through mathematical formulas. Only the active dimensions need to be adjusted. R p , R ph , R z This will drive the shell geometry model to update automatically.

[0087] S2. Parametric modeling of displacement rotor: Based on two active dimensions, blade thickness and hub thickness, calculate passive dimensions such as blade wrap angle and arc length.

[0088] Based on the structural characteristics of the displacement rotor, the thickness of the displacement rotor blades is determined. E p and wheel hub thickness E ph As an active dimension, the blade shape is optimized through trigonometric functions and geometric relationships to meet the rotor sealing and strength requirements.

[0089] Calculate the wrap angle based on the blade thickness and hub radius. Obtain the angle corresponding to the arc of the rotor blade. Passive size association logic rules:

[0090]

[0091] This ensures the blades are sealed to the housing during rotation, reducing gap leakage and preventing excessive wear.

[0092] The arc length of the displacement rotor blade is obtained by calculating the blade wrap angle and blade radius. L sp Passive size association rules:

[0093]

[0094] It is used to accurately model blade geometry, ensure the accuracy of displacement calculation, ensure that the displacement parameters of the displacement rotor are consistent with the design target, and improve the accuracy of proportional control.

[0095] By relating the drive shaft bore size to the hub thickness, the radius of the displacement rotor drive shaft bore can be obtained. R pz Passive size association logic rules:

[0096] R pz = R ph - E ph

[0097] In the formula, the thickness of the wheel hub E ph The diameter is typically 3mm to 5mm, which ensures the structural strength and transmission stability of the rotor. Through parametric constraints, stress concentration is avoided and the shaft hole design is simplified.

[0098] By adjusting the active size ( E p , E ph), and the geometric model of the drive displacement rotor is automatically updated.

[0099] S3. Parametric modeling of the leakage-proof rotor: Based on the two active dimensions of the shaft hole edge thickness and shaft hole radius, passive dimensions such as blade arc length and shaft hole radius are calculated to ensure sealing and structural strength.

[0100] Based on the sealing function and structural strength of the leak-blocking rotor, the thickness of the edge of the drive shaft hole of the leak-blocking rotor is determined. As an active dimension, it also shares the displacement rotor drive shaft bore radius from step S2. R pz Active dimensional analysis, through mathematical formulas to establish a parameterized model of the leakage-blocking rotor, ensures dynamic matching with the displacement rotor.

[0101] The radius of the drive shaft bore of the leakage-blocking rotor is the same as that of the displacement rotor, thus obtaining the radius of the drive shaft bore of the leakage-blocking rotor. R zz Passive size association logic rules:

[0102] R zz = R ph - E ph

[0103] By using parameterized association, the standardization level of components has been improved.

[0104] Based on the sealing function of the leakage-blocking rotor, it is ensured that the flow channel can be effectively blocked during the rotation of the leakage-blocking rotor, and its blade arc length is obtained. L zs Passive size association logic rules:

[0105]

[0106] This ensures the sealing of the leakage-proof rotor and the displacement rotor, reducing gap leakage.

[0107] By correlating the blade thickness with the hub size and the thickness of the drive shaft bore edge, the rigidity and sealing of the blades are ensured, thus obtaining the required thickness for the leak-proof rotor blades. E z Passive size association rules:

[0108]

[0109] In the formula The thickness is typically 2mm to 3mm. Through dynamic calculation, deformation or leakage caused by size mismatch is avoided.

[0110] The length of the long side of the inlet cylindrical section of the leak-proof rotor blade

[0111] The short side length of the inlet cylindrical section of the leak-proof rotor blade

[0112] By adjusting the active size ( ), and the geometric model of the drive leakage rotor is automatically updated.

[0113] S4. Parametric modeling of the proportioning level maps the target proportion to the shell height proportion to ensure the accuracy of proportion control.

[0114] By directly mapping the proportioning ratio of the three-component proportional controller to the housing height, the displacement ratio of the volumetric metering component is ensured to be consistent with the design target, thus obtaining the passive dimension correlation logic rule for the proportional controller housing height.

[0115] According to the target ratio (1: K 1: K 2) Reference height H s The height of the other two shell layers is K 1× H s and K 2× H s .

[0116] This passive size logic association rule simplifies the hierarchical design of multi-component proportional controllers, avoids complex flow calculations, and ensures proportional accuracy.

[0117] S5. Parametric modeling of transmission gears: Automatically generate gear models based on module active dimensions to ensure the speed ratio between displacement rotor and leakage-blocking rotor.

[0118] Based on the transmission characteristics of the two-displacement rotor and the leakage-blocking rotor, the gear module is determined ( m As the active dimension, the gear design is directly bound to the rotor geometry, combined with the active dimension in step S1 ( R ph , R z The displacement rotor gear teeth number are obtained by combining the preset speed ratio with the speed. Z 1 and the number of teeth of the leakage-blocking rotor gear Z 2. Passive size association logic rules

[0119] Z 1 = ( R ph + R z ) / (3× m )

[0120] Z 2 = 2 × ( R ph +R z ) / (3× m )

[0121] Through parametric correlation, synchronous movement of the displacement rotor and the leakage-blocking rotor is ensured, avoiding motion interference and transmission errors. Only the gear model needs to be adjusted. m The driving gear geometry model is automatically updated.

[0122] S6. Parametric modeling of sliding bearings, sharing the active dimension of shaft hole edge thickness, to achieve collaborative design of bearings and rotors.

[0123] Based on the strength requirements of the sliding bearing, the thickness δ of the leak-proof rotor bearing bore edge in step S3 is used as the active dimension, realizing the collaborative design of the bearing and rotor, and obtaining the following passive dimension association logic rules:

[0124] sliding bearing inner diameter

[0125] sliding bearing outer diameter

[0126] The length of a sliding bearing is typically 6mm to 8mm.

[0127] The active size is adjusted in step S3. This allows for automatic updates of the sliding bearing geometry model.

[0128] Example:

[0129] The goal of this implementation example is to design a ternary proportional controller with a ratio of 1:1.5:2.0.

[0130] Step S1: Parameterized design of the housing

[0131] First, determine the three active dimensions of the housing design, and select the specific values:

[0132] Displacement rotor radius R p =30mm

[0133] Displacement rotor hub radius R ph =20mm

[0134] Leakage-blocking rotor radius R z =15mm

[0135] Based on the above active dimensions and predefined association logic rules, all passive dimensions of the shell are calculated.

[0136] Center distance between two displacement rotors:

[0137] Center distance between the displacement rotor and the leakage-blocking rotor:

[0138] Displacement number of rotors N p The value is 2, therefore the rotation angle of the displacement rotor chamber is: θ p =360° / 2 = 180°

[0139] Speed ​​ratio correlation coefficient N z The value is 2, therefore the angle of the leakage-blocking rotor rotation chamber is: θ z =360° / (2×2)=90°

[0140] The transition line length between the rotating chambers of the two-displacement rotors:

[0141]

[0142] Casing inlet / outlet diameter:

[0143] Length of straight pipe section at the inlet and outlet of the shell L 2. Empirical value: 18 mm

[0144] Shell associated length:

[0145] Input all the above dimensional parameters into the equations of 3D modeling software (such as UG, SolidWorks, CATIA, etc.), and then modify them. R p , R ph , R z The shell geometry model can be automatically updated by setting three active dimensions.

[0146] Step S2: Parametric design of displacement rotor

[0147] Determine the two active dimensions of the displacement rotor:

[0148] Displacement rotor blade thickness E p = 5 mm

[0149] Displacement rotor hub thickness E ph = 4 mm

[0150] Based on the above active dimensions, calculate the passive dimensions of the displacement rotor:

[0151] The central angle corresponding to the arc of the displacement rotor blade:

[0152] Displacement rotor blade arc length:

[0153] Displacement rotor bearing bore radius: R pz = R ph - E ph = 20 - 4 = 16 mm

[0154] By modifying E p and E ph The geometric model of the displacement rotor will be updated automatically.

[0155] Step S3: Parametric Design of Leakage-Proof Rotor

[0156] Determine the active dimensions of the leakage-blocking rotor: thickness of the bearing bore edge of the leakage-blocking rotor. = 2.5 mm

[0157] Based on the active size and the result obtained in step S2 R pz (16 mm), calculate the passive dimension of the leakage-blocking rotor.

[0158] Leakage-proof rotor bearing bore radius: R zz = R pz = 16 mm

[0159] Arc length of the leakage-blocking rotor blade: L zs = π × R z / 2 = π × 15 / 2 ≈ 23.56 mm

[0160] Leakage-blocking rotor blade thickness:

[0161] Length of the long side of the inlet cylindrical section of the leakage-blocking rotor blade:

[0162] Length of the shorter side of the inlet cylindrical section of the leakage-blocking rotor blade:

[0163] (A negative value indicates that the two straight segments may overlap under this structure, and adjustments need to be made according to the actual styling rules. This result can be used to evaluate the compactness of the blade structure.)

[0164] By modifying It can quickly assess the impact on the strength of the leakage-blocking rotor blades and automatically drive the geometric model update.

[0165] Step S4: Parameterized Design of Proportioning Level

[0166] Based on the target proportion ratio of 1:1.5:2.0, a baseline height is set. Assume the baseline height corresponding to the smallest proportion component. H s = 10 mm, then the heights of the other two volumetric metering components are respectively:

[0167] K 1× H s = 1.5 × 10 = 15 mm

[0168] K 2× H s = 2.0 × 10 = 20 mm

[0169] Step S5: Parametric Design of Transmission Gears

[0170] Set the gear module to the driving dimension: m = 2.

[0171] Based on the relationship between the active dimension and the speed ratio in step S1, calculate the number of gear teeth:

[0172] Displacement rotor gear teeth number: Z 1 = ( R ph + R z ) / (3 × m) = 35 / (3 × 2) ≈ 5.83, rounded to 6

[0173] Number of teeth on the leakage-blocking rotor gear: Z 2 = 2 × ( R ph + R z ) / (3 × m) = 2 × 35 / (3 × 2) ≈11.67, rounded to 12 (at this time the actual speed ratio remains 2:1).

[0174] By adjusting the module m, the gear's geometry will be automatically updated.

[0175] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A parametric modeling method for a three-component proportional controller, characterized in that, Includes the following steps: S1. Parametric modeling of the shell: Based on three active dimensions—the radius of the displacement rotor and the leakage-blocking rotor, and the radius of the displacement rotor hub—passive dimensions such as the center distance, the angle of the rotating chamber, and the length of the flow channel are determined through geometric relationships, thereby achieving precise rotor fit and flow channel optimization. S2. Parametric modeling of displacement rotor: Based on two active dimensions, blade thickness and displacement rotor hub thickness, the passive dimensions of blade wrap angle and arc length are calculated. S3. Parametric modeling of the leakage-proof rotor: Based on the two active dimensions of the shaft hole edge thickness and shaft hole radius, the passive dimensions of the blade arc length and shaft hole radius are calculated to ensure sealing and structural strength. S4. Parametric modeling of the proportioning level maps the target proportion to the shell height proportion to ensure the accuracy of proportion control. S5. Parametric modeling of transmission gears: Automatically generate gear models based on module active dimensions to ensure the speed ratio between displacement rotor and leakage-blocking rotor. S6. Parametric modeling of sliding bearings, sharing the active dimension of shaft hole edge thickness, to achieve collaborative design of bearings and rotors.

2. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S1 includes the following steps: Based on the specific structure and constraints of the volumetric metering component, the displacement rotor radius, displacement rotor hub radius, and leakage-blocking rotor radius are determined as the active dimensions of the housing profile. Based on the isosceles right triangle relationship in the geometry of the two-displacement rotor and the leakage-blocking rotor, the passive dimension association logic rule of the center distance between the two-displacement rotor is obtained. Based on the meshing relationship between the displacement rotor and the leakage blocking rotor, the passive dimension association logic rule of the center distance between the displacement rotor and the leakage blocking rotor is obtained. Based on the displacement rotor data, the rotation chamber angle is evenly distributed to obtain the passive dimension association logic rule of the displacement rotor rotation chamber angle; Based on the speed ratio of the displacement rotor and the leakage blocking rotor, the rotation chamber angle is allocated, and the passive dimension association logic rule of the leakage blocking rotor rotation chamber angle is obtained. The passive dimension association logic rule for calculating the transition line length between the two displacement rotor rotating chambers is obtained by calculating the transition line length through geometric relationships. Based on the fluid continuity equation, the inlet and outlet diameters are correlated with the rotor size to obtain the passive size correlation logic rules for the inlet and outlet diameters of the casing; Based on the length of the straight pipe section, a passive dimension association rule is obtained for the total length.

3. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S2 includes the following steps: Based on the structural characteristics of the displacement rotor, the thickness of the displacement rotor blades and the thickness of the displacement rotor hub are taken as active dimensions. The blade shape is optimized by trigonometric functions and geometric relationships to meet the rotor sealing and strength requirements. The wrap angle is calculated based on the blade thickness and the radius of the displacement rotor hub, and the passive dimension association logic rule corresponding to the angle of the displacement rotor blade arc is obtained. The passive dimension association rule for the arc length of the displacement rotor blade is obtained by calculating the arc length based on the blade wrap angle and blade radius. By associating the drive shaft hole size with the displacement rotor hub thickness, a passive dimension association logic rule for the displacement rotor drive shaft hole radius is obtained. By adjusting the active dimensions, the displacement rotor geometry model is automatically updated.

4. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S3 includes the following steps: Based on the sealing function and structural strength of the leakage-blocking rotor, the edge thickness of the transmission shaft hole of the leakage-blocking rotor is taken as the active dimension, while sharing the active dimension of the transmission shaft hole radius of the displacement rotor in step S2. A parameterized model of the leakage-blocking rotor is established through mathematical formulas to ensure dynamic matching with the displacement rotor. The radius of the drive shaft hole of the leakage blocking rotor is the same as that of the displacement rotor, and the passive dimension association logic rule of the radius of the drive shaft hole of the leakage blocking rotor is obtained. Based on the blocking function of the leakage-blocking rotor, ensure that the flow channel can be effectively blocked during the rotation of the leakage-blocking rotor, and obtain the passive dimension association logic rules of its blade arc length. By associating the blade thickness with the displacement rotor hub size and the drive shaft bore edge thickness, the rigidity and sealing of the blades are ensured, and a passive dimension correlation rule for the thickness of the leakage-blocking rotor blades is obtained. Obtain the length of the long side and the length of the short side of the inlet cylindrical section of the leakage-blocking rotor blade; By adjusting the active dimensions, the geometric model of the leakage-blocking rotor is automatically updated.

5. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S4 includes the following steps: The proportioning ratio of the three-component proportional controller is directly mapped to the housing height to ensure that the displacement ratio of the volumetric metering component is consistent with the design target, and to obtain the passive dimension association logic rule of the proportional controller housing height. Calculate the heights of the other two shell layers based on the target proportion and reference height.

6. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S5 includes the following steps: Based on the transmission characteristics of the two-displacement rotor and the leakage-blocking rotor, the gear module is determined as the active dimension, and the gear design is directly bound to the rotor geometry. Combining the active dimension in step S1 and the preset speed ratio, the passive dimension association logic rule of the number of teeth of the displacement rotor gear and the number of teeth of the leakage-blocking rotor gear is obtained.

7. The parametric modeling method for a three-component proportional controller according to claim 1, characterized in that, S6 includes the following steps: Based on the strength requirements of the sliding bearing, the thickness of the leak-proof rotor bearing bore edge in step S3 is used as the active dimension, realizing the collaborative design of the bearing and rotor, and obtaining the following passive dimension association logic rules: Inner diameter of the sliding bearing; Outer diameter of sliding bearing; The length of the sliding bearing is a fixed value; By adjusting the active dimension in step S3, the sliding bearing geometry model is automatically updated.

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