CN111680370B - Design method and design device for hydraulic valve - Google Patents
Design method and design device for hydraulic valve Download PDFInfo
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- CN111680370B CN111680370B CN202010336623.1A CN202010336623A CN111680370B CN 111680370 B CN111680370 B CN 111680370B CN 202010336623 A CN202010336623 A CN 202010336623A CN 111680370 B CN111680370 B CN 111680370B
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Abstract
The disclosure provides a design method and a design device for a hydraulic valve, and belongs to the field of design and development of hydraulic elements. The design method comprises the following steps: acquiring a three-dimensional model of the hydraulic valve; performing fluid performance simulation on the hydraulic valve on the three-dimensional model; taking a simulation result of fluid performance simulation as input, and performing system dynamic response performance simulation on the hydraulic valve; optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation; building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve; taking a simulation result of fluid performance simulation as an external load input of the structure, and performing structural performance simulation on the hydraulic valve on a structural strength simulation model; performing secondary optimization on structural design parameters of the hydraulic valve according to simulation results of structural performance; and establishing a new three-dimensional model according to the structural design parameters of the hydraulic valve after the secondary optimization. The design method improves the comprehensiveness and accuracy of the hydraulic valve performance simulation evaluation.
Description
Technical Field
The disclosure relates to the field of design and development of hydraulic elements, and in particular relates to a design method and a design device of a hydraulic valve.
Background
The hydraulic valve is widely applied to various ships and ocean engineering equipment. Hydraulic valves may be used to regulate and control the pressure and speed of the hydraulic system. Common hydraulic valves include main valves, balance valves, check valves, speed switching valves, compensation valves, unloading valves, and reversing valves.
As an important element in a hydraulic system, the safety and reliability requirements of the hydraulic valve are high, so that the fluid performance, the system performance and the structural performance of the hydraulic valve often need to be repeatedly evaluated, verified and optimized in the design and development process. However, at present, simulation analysis aiming at each performance of the hydraulic valve is scattered, the final simulation analysis result is not accurate enough, the structural design of the hydraulic valve can be influenced, and the safety and reliability of the hydraulic valve cannot meet the actual requirements.
Disclosure of Invention
The embodiment of the disclosure provides a design method and a design device for a hydraulic valve, which solidify a full-performance simulation method of the hydraulic valve, realize standardization, procedural and templatization of each performance simulation procedure of the hydraulic valve, enable a user to accurately and rapidly simulate each performance of the hydraulic valve according to the method, and ensure the safety and reliability of the designed hydraulic valve. The technical scheme is as follows:
in a first aspect, there is provided a design method of a hydraulic valve, the design method including:
acquiring a three-dimensional model of the hydraulic valve;
performing fluid performance simulation on the hydraulic valve on the three-dimensional model, and outputting a simulation result of the fluid performance simulation;
taking the simulation result of the fluid performance simulation as input, performing system dynamic response performance simulation on the hydraulic valve, and outputting the simulation result of the system dynamic response performance simulation;
optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation;
building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve;
taking the simulation result of the fluid performance simulation as the structural external load input, carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting the simulation result of the structural performance simulation;
performing secondary optimization on structural design parameters of the hydraulic valve according to simulation results of the structural performance;
and establishing a new three-dimensional model according to the structural design parameters of the hydraulic valve after secondary optimization.
Optionally, the acquiring a three-dimensional model of the hydraulic valve includes:
and acquiring a new three-dimensional model established according to the structural design parameters of the hydraulic valve after secondary optimization.
Optionally, the performing fluid performance simulation on the three-dimensional model on the hydraulic valve, and outputting a simulation result of the fluid performance simulation includes:
determining a fluid region of the hydraulic valve from the three-dimensional model;
dividing the fluid region into a plurality of grids;
determining an inlet flow and an outlet pressure of the hydraulic valve;
determining a solving parameter of the fluid performance simulation, wherein the solving parameter comprises at least one of convergence precision or iteration step number;
and carrying out fluid performance simulation on the hydraulic valve according to the inlet flow and the outlet pressure of the hydraulic valve and the solving parameters, wherein the simulation result of the fluid performance simulation comprises the pressure and the flow of the fluid area corresponding to each grid.
Optionally, the step of inputting the simulation result of the fluid performance simulation as an external load of the structure, performing structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting the simulation result of the structural performance simulation includes:
and leading the pressure distribution of the fluid area corresponding to each grid into the structural strength simulation model, carrying out unidirectional fluid-solid coupling simulation on the structural strength simulation model, and outputting the structural performance simulation of the hydraulic valve to obtain a simulation result, wherein the simulation result of the structural performance simulation comprises stress and deformation of each element in the hydraulic valve.
Optionally, the step of performing system dynamic response performance simulation on the hydraulic valve by taking a simulation result of the fluid performance simulation as an input, and outputting a simulation result of the system dynamic response performance simulation includes:
dividing the hydraulic valve into four parts, namely a valve port flowing part, a control oil cavity, a spring cavity and a valve core;
establishing a one-dimensional model or a two-dimensional model of the four parts;
and connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation on the hydraulic valve system by taking a fluid simulation result as an input parameter, wherein the simulation result of the dynamic response performance simulation of the system comprises a pressure response curve and a flow response curve of all valve ports of the hydraulic valve.
In another aspect, there is provided a design apparatus of a hydraulic valve, the design apparatus including:
the model acquisition module is used for acquiring a three-dimensional model of the hydraulic valve;
the fluid performance simulation module is used for performing fluid performance simulation on the hydraulic valve on the three-dimensional model and outputting a simulation result of the fluid performance simulation;
the system dynamic response performance simulation module is used for carrying out system dynamic response performance simulation on the hydraulic valve by taking a simulation result of the fluid performance simulation as input and outputting a simulation result of the system dynamic response performance simulation;
the first optimization module is used for optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation;
the first model building module is used for building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve;
the structural performance simulation module is used for taking a simulation result of the fluid performance simulation as an external structural load input, carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting a simulation result of the structural performance simulation;
the second optimization module is used for secondarily optimizing the structural design parameters of the hydraulic valve according to the simulation result of the structural performance;
and the second model building module is used for building a new three-dimensional model according to the structural design parameters of the hydraulic valve after the secondary optimization.
Optionally, the model acquisition module is further configured to:
and acquiring a new three-dimensional model established according to the structural design parameters of the hydraulic valve after secondary optimization.
Optionally, the fluid performance simulation module is configured to perform fluid performance simulation on the hydraulic valve on the three-dimensional model in the following manner, and output a simulation result of the fluid performance simulation:
determining a fluid region of the hydraulic valve from the three-dimensional model;
dividing the fluid region into a plurality of grids;
determining an inlet flow and an outlet pressure of the hydraulic valve;
determining a solving parameter of the fluid performance simulation, wherein the solving parameter comprises at least one of convergence precision or iteration step number;
and carrying out fluid performance simulation on the hydraulic valve according to the inlet flow and the outlet pressure of the hydraulic valve and the solving parameters, wherein the simulation result of the fluid performance simulation comprises the pressure and the flow of the fluid area corresponding to each grid.
Optionally, the structural performance simulation module is further configured to:
and leading the pressure distribution of the fluid area corresponding to each grid into the structural strength simulation model, carrying out unidirectional fluid-solid coupling simulation on the structural strength simulation model, and outputting a simulation result of the structural performance simulation of the hydraulic valve, wherein the simulation result of the structural performance simulation comprises stress and deformation of each element in the hydraulic valve.
Optionally, the system dynamic response performance simulation module is configured to perform system dynamic response performance simulation on the hydraulic valve by using a simulation result of the fluid performance simulation as an input in the following manner, and output a simulation result of the system dynamic response performance simulation:
dividing the hydraulic valve into four parts, namely a valve port flowing part, a control oil cavity, a spring cavity and a valve core;
establishing a one-dimensional model or a two-dimensional model of the four parts;
and connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation on the hydraulic valve system by taking a fluid simulation result as an input parameter, wherein the simulation result of the dynamic response performance simulation of the system comprises a pressure response curve and a flow response curve of all valve ports of the hydraulic valve.
The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:
the structure of the hydraulic valve is simulated by acquiring a three-dimensional model of the hydraulic valve. And then, according to the logic sequence and parameter transfer relation among the performances of the hydraulic valve, the fluid performance, the system performance and the structural performance of the hydraulic valve are simulated in sequence. The hydraulic valve is subjected to fluid performance simulation on the three-dimensional model preferentially, then the simulation result of the fluid performance simulation is taken as input, the hydraulic valve is subjected to system dynamic response performance simulation, and the structural design parameters of the hydraulic valve are optimized at one time according to the simulation result of the system dynamic response performance simulation. And then, building a structural strength simulation model by using the optimized structural design parameters of the hydraulic valve, taking the simulation result of the fluid performance simulation as the structural external load input, and carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model to obtain the simulation result of the structural performance, the fluid performance and the system dynamic performance of the hydraulic valve. And secondly, secondarily optimizing structural design parameters of the hydraulic valve according to a simulation result of the structural performance, and establishing a new three-dimensional model according to the secondarily-optimized structural design parameters of the hydraulic valve, so that the hydraulic valve can be designed according to the new three-dimensional model. Therefore, the design method combines the simulation analysis of the fluid performance, the system performance and the structural performance of the hydraulic valve, and enables the results of the performance analysis to be related to each other, so that the comprehensiveness and the accuracy of the simulation evaluation of the performance of the hydraulic valve are improved, the full-performance simulation method of the hydraulic valve is solidified, the standardization, the flow and the templatization of the simulation flow of each performance of the hydraulic valve are realized, and a user can accurately and rapidly simulate each performance of the hydraulic valve according to the method, so that the safety and the reliability of the designed hydraulic valve can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a method flow diagram of a hydraulic valve design method provided by an embodiment of the present disclosure;
FIG. 2 is a method flow diagram of another hydraulic valve design method provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a hydraulic valve provided in an embodiment of the present disclosure;
FIG. 4 is a block diagram of a hydraulic valve design apparatus provided in an embodiment of the present disclosure;
fig. 5 is an overall architecture diagram of a hydraulic valve design apparatus provided by an embodiment of the present disclosure.
Detailed Description
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.
The embodiment of the disclosure provides a design method of a hydraulic valve, which can carry out simulation analysis on the full performance of the hydraulic valve. The full performance of the hydraulic valve includes fluid performance, system dynamic response performance and structural performance, among others. The purpose of the simulation of the fluid performance of the hydraulic valve is to evaluate whether the movement stability, the pressure loss and the efficiency of the valve core meet the requirements. The purpose of simulating the system dynamic response performance of the hydraulic valve is to evaluate whether the working principle and design of the hydraulic valve are reasonable or not and whether the response speed and stability of the hydraulic valve meet the dynamic response requirements or not. The purpose of carrying out the simulation to the structural performance of hydraulic valve is whether the structural strength of aassessment hydraulic valve satisfies the requirement, can guarantee after the deformation whether clearance between spare part accords with the size cooperation requirement.
Fig. 1 is a method flowchart of a hydraulic valve design method according to an embodiment of the present disclosure, as shown in fig. 1, where the hydraulic valve design method includes:
and 101, acquiring a three-dimensional model of the hydraulic valve.
And 102, performing fluid performance simulation on the hydraulic valve on the three-dimensional model, and outputting a simulation result of the fluid performance simulation.
And step 103, taking a simulation result of the fluid performance simulation as input, performing system dynamic response performance simulation on the hydraulic valve, and outputting a simulation result of the system dynamic response performance simulation.
And 104, optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation.
And 105, building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve.
And 106, taking a simulation result of the fluid performance simulation as an external load input of the structure, performing structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting a simulation result of the structural performance simulation.
And 107, secondarily optimizing structural design parameters of the hydraulic valve according to the simulation result of the structural performance.
And 108, establishing a new three-dimensional model according to structural design parameters of the hydraulic valve after secondary optimization.
The embodiment of the disclosure simulates the structure of the hydraulic valve by acquiring a three-dimensional model of the hydraulic valve. And then, according to the logic sequence and parameter transfer relation among the performances of the hydraulic valve, the fluid performance, the system performance and the structural performance of the hydraulic valve are simulated in sequence. The hydraulic valve is subjected to fluid performance simulation on the three-dimensional model preferentially, then the simulation result of the fluid performance simulation is taken as input, the hydraulic valve is subjected to system dynamic response performance simulation, and the structural design parameters of the hydraulic valve are optimized at one time according to the simulation result of the system dynamic response performance simulation. And then, building a structural strength simulation model by using the optimized structural design parameters of the hydraulic valve, taking the simulation result of the fluid performance simulation as the structural external load input, and carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model to obtain the simulation result of the structural performance, the fluid performance and the system dynamic performance of the hydraulic valve. And secondly, secondarily optimizing structural design parameters of the hydraulic valve according to a simulation result of the structural performance, and establishing a new three-dimensional model according to the secondarily-optimized structural design parameters of the hydraulic valve, so that the hydraulic valve can be designed according to the new three-dimensional model. Therefore, the design method combines the simulation analysis of the fluid performance, the system performance and the structural performance of the hydraulic valve, and enables the results of the performance analysis to be related to each other, so that the comprehensiveness and the accuracy of the simulation evaluation of the performance of the hydraulic valve are improved, the full-performance simulation method of the hydraulic valve is solidified, the standardization, the flow and the templatization of the simulation flow of each performance of the hydraulic valve are realized, and a user can accurately and rapidly simulate each performance of the hydraulic valve according to the method, so that the safety and the reliability of the designed hydraulic valve can be ensured.
Fig. 2 is a flow chart of a method for designing another hydraulic valve according to an embodiment of the present disclosure, as shown in fig. 2, the method for designing a hydraulic valve includes:
step 201, acquiring a three-dimensional model of the hydraulic valve.
In one implementation of this embodiment, a three-dimensional model of the hydraulic valve may be built using PRO/E or UG or Spaceclaim software according to initial design parameters on the design drawing of the hydraulic valve.
And 202, performing fluid performance simulation on the hydraulic valve on the three-dimensional model, and outputting a simulation result of the fluid performance simulation.
Optionally, step 202 may include:
first, a fluid region of the hydraulic valve is determined based on the three-dimensional model.
In a second step, the fluid region is divided into a plurality of grids.
In this embodiment, the grid of fluid regions may be partitioned in Fluent or CFX software.
And thirdly, determining the inlet flow and the outlet pressure of the hydraulic valve.
In this embodiment, the inlet flow and outlet pressure of the hydraulic valve may be determined according to actual design requirements.
In particular implementations, the inlet flow and outlet pressure of the hydraulic valve may be determined and entered as input parameters into Fluent or CFX software.
Fourth, determining the solving parameters of the fluid performance simulation,
wherein the solving parameters include at least one of convergence accuracy or iteration steps.
Alternatively, the convergence accuracy may be set such that the initial residual is below 1e-03 (i.e., 1 x 10 -3 ) The iteration step number may be set to 3000.
Where residual refers to the difference between the actual observed value and the estimated value (fitting value).
In a specific implementation, the solution parameters may be input as input parameters into Fluent or CFX software.
And fifthly, carrying out fluid performance simulation on the hydraulic valve according to the set inlet flow and outlet pressure of the hydraulic valve and the solving parameters.
Alternatively, fluid performance simulation may be performed in a transient fluid dynamics simulation manner. Because the valve element moves originally in the working process, the result obtained by adopting a transient fluid dynamics simulation mode is more accurate and real.
In this embodiment, the simulation result of the fluid performance simulation includes the pressure and flow rate of the fluid region corresponding to each grid. The simulation result can obtain the pressure field distribution and the speed field distribution of the whole fluid field, so that the flow pressure loss characteristic, the flow proportion characteristic and the hydraulic power characteristic of the hydraulic valve can be calculated, and whether the movement stability, the pressure loss and the efficiency of the valve core meet the requirements can be evaluated.
And 203, carrying out system dynamic response performance simulation on the hydraulic valve by taking a simulation result of the fluid performance simulation as input, and outputting a simulation result of the system dynamic response performance simulation.
Optionally, step 203 may include:
the first step, the hydraulic valve is divided into a valve port flowing part, a control oil cavity, a spring cavity and a valve core.
The division of the hydraulic valve member into several parts depends on the basic construction and mechanical composition of the structure of the hydraulic valve. In other implementations of the present disclosure, the hydraulic valve may also be divided into several other sections.
Fig. 3 is a schematic structural view of a hydraulic valve according to an embodiment of the present disclosure, and as shown in fig. 3, the hydraulic valve includes a valve body 1, a cone valve core 2, a spring 3, a spring seat 4, and a retainer ring 5. The control oil cavity is a cavity S1 from an inlet to the cone valve core 2, the spring cavity is a cavity S2 where the spring is located, the valve core is the cone valve core 2, and the valve port flowing part is an inlet part M1 of the hydraulic valve.
And secondly, building a one-dimensional model or a two-dimensional model of the four parts.
In this embodiment, a three-dimensional model of the hydraulic valve is created using a parameterized model, which is reduced to digital dimensions such as pipe diameter, pipe turn, pipe length, spool diameter, spool travel, spring preload, stiffness, etc.
And because the valve element in the hydraulic valve element is a moving part. Therefore, a complete dynamic balance equation of the valve core can be established according to the geometric structure of the valve core, the hydraulic oil flow path and the hydraulic control principle. The digital size of the unknown required parameters can be calculated according to the known digital size according to the dynamic balance equation, so that a one-dimensional model or a two-dimensional model of four parts is built according to the calculated digital size of each parameter.
In this embodiment, a one-dimensional model or a two-dimensional model may be built by PRO/E or UG or Spaceclaim software.
And thirdly, connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation of a hydraulic valve system on the hydraulic valve by taking a fluid simulation result as an input parameter.
In this embodiment, the system dynamic response performance simulation may be performed using the amesims or MWorks software. Wherein, a data interface is arranged between the fluid simulation software FLUENT and the AMESim or MWorks software
In specific implementation, the result of the fluid simulation result may be input as an input parameter to the amesims or MWorks software.
Optionally, the simulation results of the system dynamic response performance simulation include pressure response curves and flow response curves for the respective ports of the hydraulic valve. Through the simulation result of the system dynamic response performance simulation, whether the working principle of the hydraulic valve is reasonable in design or not can be evaluated, and whether the response speed and stability of the valve meet the dynamic response requirements or not.
And 204, optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation.
And 205, building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve.
In this embodiment, the structural strength simulation model may be an integral model of the hydraulic valve, or may be a partial functional model of the extracted hydraulic valve. The building, extraction and proper simplification of the structural model can be performed in CAD software such as PRO/E or Spaceclaim.
And 206, taking the simulation result of the fluid performance simulation as the structural external load input, and carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model to output the simulation result of the structural performance simulation.
Optionally, step 206 may include:
the pressure distribution of the fluid area corresponding to each grid is led into a structural strength simulation model, unidirectional fluid-solid coupling simulation is carried out on the structural strength simulation model, and a simulation result of the structural performance simulation of the hydraulic valve is output.
The unidirectional fluid-solid coupling simulation mode is adopted, so that the accuracy of the structural simulation load input can be ensured, and the simulation solving efficiency can be ensured.
In this embodiment, the structural performance simulation may be performed using ANSYS software. A pressure data interface is arranged between the fluid simulation software FLUENT and the ANSYS software so as to facilitate the introduction of the pressure distribution of the fluid area corresponding to each grid into the structural strength simulation model.
Optionally, the simulation results of the structural performance simulation include stresses and deformations to which the elements in the hydraulic valve are subjected. The simulation result of the structural performance simulation can be used for evaluating whether the structural strength of the hydraulic valve meets the requirement or not, and whether the clearance between parts meets the requirement of size matching or not can be ensured after deformation.
For example, the simulation results include stresses and deformations to which the valve housing, the valve element, the bolt, and other components are subjected.
And 207, secondarily optimizing structural design parameters of the hydraulic valve according to the simulation result of the structural performance.
And step 208, establishing a new three-dimensional model according to structural design parameters of the hydraulic valve after secondary optimization.
In this embodiment, PRO/E or UG or Spaceclaim software may be used to build the three-dimensional model.
Step 209, checking the new three-dimensional model.
In this embodiment, a new three-dimensional model may be used as a structural strength simulation model, and structural performance simulation may be performed again to re-detect whether the structural strength of the hydraulic valve meets the requirement, and if so, the flow may be ended, and the new three-dimensional model may be used for designing the hydraulic valve.
If the new three-dimensional model does not meet the design requirements, return to step 201.
After step 209, returning to step 201, the re-acquired three-dimensional model of the hydraulic valve may be the new three-dimensional model established in step 208. Thus, by repeating steps 201 to 209 several times, a three-dimensional model of the hydraulic valve satisfying the design requirements can be gradually built.
The embodiment of the disclosure simulates the structure of the hydraulic valve by acquiring a three-dimensional model of the hydraulic valve. And then, according to the logic sequence and parameter transfer relation among the performances of the hydraulic valve, the fluid performance, the system performance and the structural performance of the hydraulic valve are simulated in sequence. The hydraulic valve is subjected to fluid performance simulation on the three-dimensional model preferentially, then the simulation result of the fluid performance simulation is taken as input, the hydraulic valve is subjected to system dynamic response performance simulation, and the structural design parameters of the hydraulic valve are optimized at one time according to the simulation result of the system dynamic response performance simulation. And then, building a structural strength simulation model by using the optimized structural design parameters of the hydraulic valve, taking the simulation result of the fluid performance simulation as the structural external load input, and carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model to obtain the simulation result of the structural performance, the fluid performance and the system dynamic performance of the hydraulic valve. And secondly, secondarily optimizing structural design parameters of the hydraulic valve according to a simulation result of the structural performance, and establishing a new three-dimensional model according to the secondarily-optimized structural design parameters of the hydraulic valve, so that the hydraulic valve can be designed according to the new three-dimensional model. Therefore, the design method combines the simulation analysis of the fluid performance, the system performance and the structural performance of the hydraulic valve, and enables the results of the performance analysis to be related to each other, so that the comprehensiveness and the accuracy of the simulation evaluation of the performance of the hydraulic valve are improved, the full-performance simulation method of the hydraulic valve is solidified, the standardization, the flow and the templatization of the simulation flow of each performance of the hydraulic valve are realized, and a user can accurately and rapidly simulate each performance of the hydraulic valve according to the method, so that the safety and the reliability of the designed hydraulic valve can be ensured.
Fig. 4 is a block diagram of a hydraulic valve design apparatus according to an embodiment of the present disclosure, and as shown in fig. 4, a design apparatus 400 includes a model acquisition module 401, a fluid performance simulation module 402, a system dynamic response performance simulation module 403, a first optimization module 404, a first model establishment module 405, a structural performance simulation module 406, a second optimization module 407, and a second model establishment module 408.
The model acquisition module 401 is configured to acquire a three-dimensional model of the hydraulic valve.
In this embodiment, PRO/E or UG or Spaceclaim software may be used to build a three-dimensional model of the hydraulic valve.
The fluid performance simulation module 402 is configured to perform fluid performance simulation on the hydraulic valve on the three-dimensional model, and output a simulation result of the fluid performance simulation.
The system dynamic response performance simulation module 403 is configured to perform system dynamic response performance simulation on the hydraulic valve by using a simulation result of the fluid performance simulation as an input, and output a simulation result of the system dynamic response performance simulation.
The first optimization module 404 is configured to optimize structural design parameters of the hydraulic valve according to a simulation result of the system dynamic response performance simulation.
The first model building module 405 is configured to build a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve.
The structural performance simulation module 406 is configured to perform structural performance simulation on the hydraulic valve on the structural strength simulation model by using a simulation result of the fluid performance simulation as an external load input of the structure, and output a simulation result of the structural performance simulation.
In this embodiment, the structural simulation model may be an overall model of the hydraulic valve, or may be a partial functional model of the extracted hydraulic valve. The building, extraction and proper simplification of the structural model can be performed in CAD software such as PRO/E or Spaceclaim.
The second optimization module 407 is configured to secondarily optimize the structural design parameters of the hydraulic valve according to the simulation result of the structural performance.
The second model building module 408 is configured to build a new three-dimensional model according to the structural design parameters of the secondarily-optimized hydraulic valve.
Optionally, the model acquisition module 401 is further configured to:
and acquiring a new three-dimensional model established according to the structural design parameters of the hydraulic valve after secondary optimization.
I.e. the model acquisition module 401 is also arranged to acquire the new three-dimensional model built by the second model building module 308.
Optionally, the fluid performance simulation module 402 is configured to perform fluid performance simulation on the hydraulic valve on the three-dimensional model in the following manner, and output a simulation result of the fluid performance simulation:
first, a fluid region of the hydraulic valve is determined based on the three-dimensional model.
In a second step, the fluid region is divided into a plurality of grids.
In this embodiment, the grid of fluid regions may be partitioned in Fluent or CFX software.
And thirdly, determining the inlet flow and the outlet pressure of the hydraulic valve.
In this embodiment, the inlet flow and outlet pressure of the hydraulic valve may be determined according to actual design requirements.
In particular implementations, the inlet flow and outlet pressure of the hydraulic valve may be determined and entered as input parameters into Fluent or CFX software.
And fourthly, determining solving parameters of fluid performance simulation.
Wherein the solving parameters include at least one of convergence accuracy or iteration steps.
Alternatively, the convergence accuracy may be set such that the initial residual is below 1e-03 (i.e., 1 x 10 -3 ) The iteration step number may be set to 3000.
Where residual refers to the difference between the actual observed value and the estimated value (fitting value).
In a specific implementation, the solution parameters may be input as input parameters into Fluent or CFX software.
And fifthly, performing fluid performance simulation on the hydraulic valve according to the inlet flow and the outlet pressure of the hydraulic valve and the solving parameters, wherein a simulation result of the fluid performance simulation comprises the pressure and the flow of the fluid area corresponding to each grid.
Alternatively, fluid performance simulation may be performed in a transient fluid dynamics simulation manner. Because the valve element moves originally in the working process, the result obtained by adopting a transient fluid dynamics simulation mode is more accurate and real.
The fluid performance simulation module 402 can obtain the pressure field distribution and the velocity field distribution of the whole fluid domain, so that the flow pressure loss characteristic, the flow proportion characteristic and the hydraulic power characteristic of the hydraulic valve can be calculated, and whether the movement stability, the pressure loss and the efficiency of the valve core meet the requirements can be evaluated.
Optionally, the system dynamic response performance simulation module 403 is configured to perform system dynamic response performance simulation on the hydraulic valve by using a simulation result of fluid performance simulation as an input in the following manner, and output a simulation result of system dynamic response performance simulation:
the first step, the hydraulic valve is divided into a valve port flowing part, a control oil cavity, a spring cavity and a valve core.
And secondly, building a one-dimensional model or a two-dimensional model of the four parts.
And thirdly, connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation of a hydraulic valve system on the hydraulic valve by taking a fluid simulation result as an input parameter, wherein the simulation result of the dynamic response performance simulation of the system comprises a pressure response curve and a flow response curve of all valve ports of the hydraulic valve.
The specific simulation manner of the system dynamic response performance simulation module 403 may refer to the above step 403, and this embodiment is not described herein.
Optionally, the structural performance simulation module 406 is further configured to:
the pressure distribution of the fluid area corresponding to each grid is led into a structural strength simulation model, unidirectional fluid-solid coupling simulation is carried out on the structural strength simulation model, and the simulation result of the structural performance simulation of the hydraulic valve is output, wherein the simulation result of the structural performance simulation comprises stress and deformation of each element in the hydraulic valve.
The unidirectional fluid-solid coupling simulation mode is adopted, so that the accuracy of the structural simulation load input can be ensured, and the simulation solving efficiency can be ensured.
Fig. 5 is a general architecture diagram of a hydraulic valve design apparatus provided in an embodiment of the present disclosure, as shown in fig. 5, which includes an interface interaction layer 510, a task execution layer 520, a model template library 530, and an underlying resource layer 540.
The interface interaction layer 510 includes a start-up interface, a model import interface, a simulation flow interface, a simulation software interface, a calculation solution interface, and a simulation result interface.
The starting interface is used for selecting whether to start the hydraulic valve full-performance simulation design device. The model import interface is used for importing and displaying the three-dimensional model of the hydraulic valve built by the model building module 501. The simulation flow interface is used for selecting and sequentially executing fluid performance simulation, system dynamic response performance simulation and structural performance simulation.
The simulation software interface is used for calling corresponding software to simulate after selecting one of the fluid performance simulation, the system dynamic response performance simulation and the structural performance simulation.
For example, after choosing to perform fluid performance simulation, fluent or CFX software may be invoked to perform the fluid performance simulation. After the system dynamic response performance simulation is selected and executed, AMESim or MWorks software can be called to perform the system dynamic response performance simulation. After the structural performance simulation is selected, ANSYS software can be called to perform the structural performance simulation.
The task execution layer 520 includes various hydraulic valve simulation modules, such as a check valve simulation module 521, a main valve simulation module 522, and a balancing valve simulation module 523.
Wherein, the check valve simulation module 521, the main valve simulation module 522 and the balance valve simulation module 523 each include three units of fluid simulation, system simulation and structural simulation.
The template layer 530 includes a simulation flow template library 531, a simulation model library 532, a simulation parameter library 533, and a test database 534.
The simulation flow template library 531 is used for ensuring flow accuracy.
The simulation model library 532 is used to directly invoke models in subsequent simulations.
The simulation parameter library 533 is used to store various input parameters required for simulation.
The trial database 534 is used to store data.
The underlying resource layer 540 includes various software (e.g., fluent, CFX, AMESim, MWorks, ANSYS or PRO/E software) interfaces and a simulation analysis standard specification framework.
The simulation analysis standard specification system is used for standardizing various simulation flows, parameter settings and the like, and the standardization of the simulation process is ensured.
The embodiment of the disclosure simulates the structure of the hydraulic valve by acquiring a three-dimensional model of the hydraulic valve. And then, according to the logic sequence and parameter transfer relation among the performances of the hydraulic valve, the fluid performance, the system performance and the structural performance of the hydraulic valve are simulated in sequence. The hydraulic valve is subjected to fluid performance simulation on the three-dimensional model preferentially, then the simulation result of the fluid performance simulation is taken as input, the hydraulic valve is subjected to system dynamic response performance simulation, and the structural design parameters of the hydraulic valve are optimized at one time according to the simulation result of the system dynamic response performance simulation. And then, building a structural strength simulation model by using the optimized structural design parameters of the hydraulic valve, taking the simulation result of the fluid performance simulation as the structural external load input, and carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model to obtain the simulation result of the structural performance, the fluid performance and the system dynamic performance of the hydraulic valve. And secondly, secondarily optimizing structural design parameters of the hydraulic valve according to a simulation result of the structural performance, and establishing a new three-dimensional model according to the secondarily-optimized structural design parameters of the hydraulic valve, so that the hydraulic valve can be designed according to the new three-dimensional model. Therefore, the design method combines the simulation analysis of the fluid performance, the system performance and the structural performance of the hydraulic valve, and enables the results of the performance analysis to be related to each other, so that the comprehensiveness and the accuracy of the simulation evaluation of the performance of the hydraulic valve are improved, the full-performance simulation method of the hydraulic valve is solidified, the standardization, the flow and the templatization of the simulation flow of each performance of the hydraulic valve are realized, and a user can accurately and rapidly simulate each performance of the hydraulic valve according to the method, so that the safety and the reliability of the designed hydraulic valve can be ensured.
The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.
Claims (10)
1. A method of designing a hydraulic valve, the method comprising:
acquiring a three-dimensional model of the hydraulic valve;
performing fluid performance simulation on the hydraulic valve on the three-dimensional model, and outputting a simulation result of the fluid performance simulation;
taking the simulation result of the fluid performance simulation as input, performing system dynamic response performance simulation on the hydraulic valve, and outputting the simulation result of the system dynamic response performance simulation;
optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation;
building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve;
taking the simulation result of the fluid performance simulation as the structural external load input, carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting the simulation result of the structural performance simulation;
performing secondary optimization on structural design parameters of the hydraulic valve according to simulation results of the structural performance;
and establishing a new three-dimensional model according to the structural design parameters of the hydraulic valve after secondary optimization.
2. The method of designing a hydraulic valve according to claim 1, wherein the obtaining a three-dimensional model of the hydraulic valve includes:
and acquiring a new three-dimensional model established according to the structural design parameters of the hydraulic valve after secondary optimization.
3. The method of designing a hydraulic valve according to claim 1, wherein the performing fluid performance simulation on the three-dimensional model on the hydraulic valve, and outputting a simulation result of the fluid performance simulation comprises:
determining a fluid region of the hydraulic valve from the three-dimensional model;
dividing the fluid region into a plurality of grids;
determining an inlet flow and an outlet pressure of the hydraulic valve;
determining a solving parameter of the fluid performance simulation, wherein the solving parameter comprises at least one of convergence precision or iteration step number;
and carrying out fluid performance simulation on the hydraulic valve according to the inlet flow and the outlet pressure of the hydraulic valve and the solving parameters, wherein the simulation result of the fluid performance simulation comprises the pressure and the flow of the fluid area corresponding to each grid.
4. The method of designing a hydraulic valve according to claim 3, wherein the step of performing structural performance simulation on the hydraulic valve on the structural strength simulation model with the simulation result of the fluid performance simulation as an out-of-structure load input, and outputting the simulation result of the structural performance simulation, comprises:
and leading the pressure distribution of the fluid area corresponding to each grid into the structural strength simulation model, carrying out unidirectional fluid-solid coupling simulation on the structural strength simulation model, and outputting the structural performance simulation of the hydraulic valve to obtain a simulation result, wherein the simulation result of the structural performance simulation comprises stress and deformation of each element in the hydraulic valve.
5. The method according to claim 1, wherein the step of performing a system dynamic response performance simulation on the hydraulic valve with the simulation result of the fluid performance simulation as an input, and outputting the simulation result of the system dynamic response performance simulation, comprises:
dividing the hydraulic valve into four parts, namely a valve port flowing part, a control oil cavity, a spring cavity and a valve core;
establishing a one-dimensional model or a two-dimensional model of the four parts;
and connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation on the hydraulic valve system by taking a fluid simulation result as an input parameter, wherein the simulation result of the dynamic response performance simulation of the system comprises a pressure response curve and a flow response curve of all valve ports of the hydraulic valve.
6. A hydraulic valve design device, characterized in that the hydraulic valve design device comprises:
the model acquisition module is used for acquiring a three-dimensional model of the hydraulic valve;
the fluid performance simulation module is used for performing fluid performance simulation on the hydraulic valve on the three-dimensional model and outputting a simulation result of the fluid performance simulation;
the system dynamic response performance simulation module is used for carrying out system dynamic response performance simulation on the hydraulic valve by taking a simulation result of the fluid performance simulation as input and outputting a simulation result of the system dynamic response performance simulation;
the first optimization module is used for optimizing structural design parameters of the hydraulic valve according to simulation results of the system dynamic response performance simulation;
the first model building module is used for building a structural strength simulation model according to the optimized structural design parameters of the hydraulic valve;
the structural performance simulation module is used for taking a simulation result of the fluid performance simulation as an external structural load input, carrying out structural performance simulation on the hydraulic valve on the structural strength simulation model, and outputting a simulation result of the structural performance simulation;
the second optimization module is used for secondarily optimizing the structural design parameters of the hydraulic valve according to the simulation result of the structural performance;
and the second model building module is used for building a new three-dimensional model according to the structural design parameters of the hydraulic valve after the secondary optimization.
7. The hydraulic valve design apparatus of claim 6, wherein the model acquisition module is further configured to:
and acquiring a new three-dimensional model established according to the structural design parameters of the hydraulic valve after secondary optimization.
8. The hydraulic valve design apparatus according to claim 6, wherein the fluid performance simulation module is configured to simulate the fluid performance of the hydraulic valve on the three-dimensional model by outputting a simulation result of the fluid performance simulation by:
determining a fluid region of the hydraulic valve from the three-dimensional model;
dividing the fluid region into a plurality of grids;
determining an inlet flow and an outlet pressure of the hydraulic valve;
determining a solving parameter of the fluid performance simulation, wherein the solving parameter comprises at least one of convergence precision or iteration step number;
and carrying out fluid performance simulation on the hydraulic valve according to the inlet flow and the outlet pressure of the hydraulic valve and the solving parameters, wherein the simulation result of the fluid performance simulation comprises the pressure and the flow of the fluid area corresponding to each grid.
9. The hydraulic valve design apparatus of claim 8, wherein the structural performance simulation module is further configured to:
and leading the pressure distribution of the fluid area corresponding to each grid into the structural strength simulation model, carrying out unidirectional fluid-solid coupling simulation on the structural strength simulation model, and outputting a simulation result of the structural performance simulation of the hydraulic valve, wherein the simulation result of the structural performance simulation comprises stress and deformation of each element in the hydraulic valve.
10. The hydraulic valve design apparatus according to claim 6, wherein the system dynamic response performance simulation module is configured to perform system dynamic response performance simulation on the hydraulic valve with a simulation result of the fluid performance simulation as an input by outputting a simulation result of the system dynamic response performance simulation:
dividing the hydraulic valve into four parts, namely a valve port flowing part, a control oil cavity, a spring cavity and a valve core;
establishing a one-dimensional model or a two-dimensional model of the four parts;
and connecting all elements in the hydraulic valve through a pipeline model according to a hydraulic schematic diagram, and carrying out dynamic response performance simulation on the hydraulic valve system by taking a fluid simulation result as an input parameter, wherein the simulation result of the dynamic response performance simulation of the system comprises a pressure response curve and a flow response curve of all valve ports of the hydraulic valve.
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