CN116663366A - Sliding valve core radial force calculation method, system, equipment and medium - Google Patents

Sliding valve core radial force calculation method, system, equipment and medium Download PDF

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Publication number
CN116663366A
CN116663366A CN202310674018.9A CN202310674018A CN116663366A CN 116663366 A CN116663366 A CN 116663366A CN 202310674018 A CN202310674018 A CN 202310674018A CN 116663366 A CN116663366 A CN 116663366A
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pressure
cross
section
valve
radial force
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张超
艾庆
王少萍
陈仁同
高宝旭
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Beihang University
Ningbo Institute of Innovation of Beihang University
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Beihang University
Ningbo Institute of Innovation of Beihang University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
    • G06T17/205—Re-meshing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/08—Fluids
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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  • General Engineering & Computer Science (AREA)
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  • Pure & Applied Mathematics (AREA)
  • Computer Graphics (AREA)
  • Software Systems (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention discloses a slide valve core radial force calculation method, a slide valve core radial force calculation system, slide valve core radial force calculation equipment and a slide valve core radial force calculation medium, and relates to the field of slide valve core radial force calculation; constructing a three-dimensional physical model of a sliding valve flow field according to the acquired contour data of the target sliding valve; grid division is carried out on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; according to the set boundary conditions, adopting a simulation mode to determine the pressure distribution vector of the finite element model; solving a valve core cross section pressure vector summation function by adopting a pressure distribution vector for any cross section in the finite element model to obtain a cross section pressure vector; vector summation calculation is carried out according to the pressure vectors of all cross sections, so that the pressure vector of the radial force of the valve core of the target slide valve is obtained; the invention can realize the calculation of the radial force of the spool valve.

Description

Sliding valve core radial force calculation method, system, equipment and medium
Technical Field
The invention relates to the field of spool valve core radial force calculation, in particular to a spool valve core radial force calculation method, a spool valve core radial force calculation system, spool valve core radial force calculation equipment and a spool valve core radial force calculation medium.
Background
Hydraulic slide valves are widely used in hydraulic systems, the reliability and the working stability of which directly influence the working state of the hydraulic system. In recent years, there has been an increasing demand for reliability and stability of hydraulic spool valves, in which spool valve radial force is an important factor affecting the performance of the hydraulic spool valve, and thus it is important to accurately calculate spool valve radial force. The excessive radial force of the spool valve core can cause the increase of the friction force of the spool valve pair of the hydraulic spool valve, thereby causing the phenomena of slow reversing action and even jamming of the hydraulic spool valve. Therefore, the radial force of the valve core of the hydraulic slide valve needs to be calculated, the radial force of the valve core is reduced through corresponding measures, and the faults caused by clamping of the valve core of the hydraulic slide valve are reduced.
The existing spool valve core radial force calculation method is mainly applied to the hydraulic spool valve with symmetrical structure, the problem of the direction of the spool valve core radial force is not needed to be considered, and the hydraulic spool valve with asymmetrical oil inlet and outlet structure is lack of a corresponding calculation method. Therefore, a simulation calculation method of the radial force of the spool valve core needs to be established, the direction of the radial force of the spool valve core is considered, and the simulation calculation method provides assistance for calculation of the radial force of the spool valve core of the hydraulic spool valve with an asymmetric oil inlet and outlet structure.
Disclosure of Invention
The invention aims to provide a method, a system, equipment and a medium for calculating radial force of a spool valve, which are used for calculating the radial force of the spool valve.
In order to achieve the above object, the present invention provides the following solutions:
a method of spool valve radial force calculation, the method comprising:
acquiring profile data of a target slide valve; the profile data includes: structure and size;
constructing a three-dimensional physical model of a sliding valve flow field according to the contour data;
grid division is carried out on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model formed by a plurality of cross sections of the valve core of the target slide valve;
according to the set boundary conditions, adopting a simulation mode to determine the pressure distribution vector of the finite element model; the set boundary conditions include: valve port opening, inlet pressure, and outlet pressure;
determining a solving function of the finite element model; the solving function comprises a valve core cross section pressure vector summation function;
solving a summation function of the valve core cross section pressure vector by adopting the pressure distribution vector for any cross section in the finite element model to obtain a cross section pressure vector; the pressure vector comprises a pressure value and a direction angle;
vector summation calculation is carried out according to the pressure vectors of all cross sections, so that the pressure vector of the radial force of the valve core of the target slide valve is obtained; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
Alternatively, the calculation formula of the pressure vector of the cross section is:
wherein P is xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) zi The sum of the pressure in the z direction of the ith cross section of the valve core; x is x ij An x coordinate of a jth node of the ith cross section; z ij The z coordinate of the jth node of the ith cross section; p is p ij The pressure at the j-th node of the i-th cross section; n is the number of nodes of the cross section; r is (r) i Radius for the ith cross section; p (P) i A pressure value for the ith cross section;a direction angle which is an ith cross section; r is (r) j Is the radius of the j-th node.
Alternatively, the calculation formula of the pressure vector of the radial force is:
wherein P is x The sum of the pressure in the x direction of the valve core; m is the number of selected cross sections; alpha is the difference between the direction angles of adjacent nodes on the same cross section; p (P) xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) x(i+1) The sum of the pressure in the x direction of the (i+1) th cross section of the valve core; r is (r) i Radius for the ith cross section; p (P) z The sum of the pressure in the z direction of the valve core; p (P) zi Z-direction of the ith cross-section of the spoolPressure and; p (P) z(i+1) The sum of the z-direction pressure of the ith cross section and the 1 st cross section of the valve core; p is the pressure value of the radial force;is the direction angle of the radial force; l is the axial length.
Optionally, grid division is performed on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model, which specifically comprises the following steps:
nonlinear dispersion is carried out on the three-dimensional physical model of the sliding valve flow field according to set grid parameters, and a three-dimensional line distribution model is obtained;
dividing the three-dimensional line distribution model according to the set region size to obtain a plurality of cross sections;
adjusting the density and the section size of any cross section according to the profile data to obtain an adjusted cross section;
and combining all the adjusted cross sections to obtain the finite element model.
Optionally, the method further comprises:
and determining the pressure distribution curve of the valve core of the target slide valve according to the pressure vector of the radial force.
A spool valve spool radial force calculation system, the system comprising:
the data acquisition module is used for acquiring the profile data of the target slide valve; the profile data includes: structure and size;
the model construction module is used for constructing a sliding valve flow field three-dimensional physical model according to the contour data;
the dividing module is used for carrying out grid division on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model formed by a plurality of cross sections of the valve core of the target slide valve;
the simulation module is used for determining a pressure distribution vector of the finite element model in a simulation mode according to the set boundary conditions; the set boundary conditions include: valve port opening, inlet pressure, and outlet pressure;
the function determining module is used for determining a solving function of the finite element model; the solving function comprises a valve core cross section pressure vector summation function;
the solving module is used for solving the sum function of the valve core cross section pressure vectors by adopting the pressure distribution vector for any cross section in the finite element model to obtain the pressure vector of the cross section; the pressure vector comprises a pressure value and a direction angle;
the calculation module is used for carrying out vector summation calculation according to the pressure vectors of all the cross sections to obtain the pressure vector of the radial force of the valve core of the target slide valve; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to perform the spool radial force calculation method described above.
A computer readable storage medium storing a computer program which when executed by a processor implements the spool radial force calculation method described above.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a slide valve core radial force calculation method, a slide valve core radial force calculation system, slide valve core radial force calculation equipment and a slide valve core radial force calculation medium, wherein a slide valve flow field three-dimensional physical model is constructed according to acquired contour data of a target slide valve, and grid division is carried out on the slide valve flow field three-dimensional physical model to obtain a finite element model; according to the set boundary conditions, adopting a simulation mode to determine the pressure distribution vector of the finite element model; solving a valve core cross section pressure vector summation function by adopting a pressure distribution vector for any cross section in the finite element model to obtain a cross section pressure vector; according to the pressure vectors of all cross sections, vector summation calculation is carried out to obtain the pressure vector of the radial force of the spool of the target spool valve, so that the calculation of the radial force of the spool valve can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for calculating radial force of a spool valve according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for calculating radial force of a spool valve according to an embodiment of the present invention in actual application;
FIG. 3 is a schematic diagram of a three-dimensional physical model of a spool flow field provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a pressure direction angle defined in cross section provided by an embodiment of the present invention;
FIG. 5 is a graph showing the angular range of a first pressure direction provided by an embodiment of the present invention;
FIG. 6 is an angular range of a second pressure direction provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of pressure distribution of each point on a cross section according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the pressure of each cross section of the valve element according to the embodiment of the present invention;
FIG. 9 is a schematic diagram of a graph illustrating pressure direction of each cross section of a valve element according to an embodiment of the present invention;
fig. 10 is a block diagram of a spool radial force calculation system according to an embodiment of the present invention.
Symbol description:
the system comprises a data acquisition module-1, a model construction module-2, a division module-3, a simulation module-4, a function determination module-5, a solving module-6 and a calculation module-7.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a method, a system, equipment and a medium for calculating radial force of a spool valve, which are used for calculating the radial force of the spool valve.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method for calculating a radial force of a spool valve, the method including:
step 100: acquiring profile data of a target slide valve; the profile data includes: structure and size.
Step 200: and constructing a three-dimensional physical model of the sliding valve flow field according to the contour data.
Step 300: grid division is carried out on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model composed of a plurality of cross sections of the spool of the target spool valve.
The method comprises the steps of performing grid division on a three-dimensional physical model of a sliding valve flow field to obtain a finite element model, and specifically comprises the following steps:
and carrying out nonlinear dispersion on the three-dimensional physical model of the sliding valve flow field according to the set grid parameters to obtain a three-dimensional line distribution model.
And carrying out region division on the three-dimensional line distribution model according to the set region size to obtain a plurality of cross sections.
And adjusting the density and the cross section size of any cross section according to the profile data to obtain an adjusted cross section.
And combining all the adjusted cross sections to obtain the finite element model.
Step 400: according to the set boundary conditions, adopting a simulation mode to determine the pressure distribution vector of the finite element model; the setting of the boundary conditions includes: valve port opening, inlet pressure, and outlet pressure.
Step 500: determining a solving function of the finite element model; the solving function includes a spool cross-section pressure vector summation function.
Step 600: solving a valve core cross section pressure vector summation function by adopting a pressure distribution vector for any cross section in the finite element model to obtain a cross section pressure vector; the pressure vector includes a pressure value and a direction angle.
Step 700: vector summation calculation is carried out according to the pressure vectors of all cross sections, so that the pressure vector of the radial force of the valve core of the target slide valve is obtained; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
Specifically, the calculation formula of the pressure vector of the cross section is:
wherein P is xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) zi The sum of the pressure in the z direction of the ith cross section of the valve core; x is x ij An x coordinate of a jth node of the ith cross section; z ij The z coordinate of the jth node of the ith cross section; p is p ij The pressure at the j-th node of the i-th cross section; n is the number of nodes of the cross section; r is (r) i Radius for the ith cross section; p (P) i A pressure value for the ith cross section;a direction angle which is an ith cross section; r is (r) j Is the radius of the j-th node.
The calculation formula of the pressure vector of the radial force is:
wherein P is x The sum of the pressure in the x direction of the valve core; m is the number of selected cross sections; alpha is the difference between the direction angles of adjacent nodes on the same cross section; p (P) xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) x(i+1) The sum of the pressure in the x direction of the (i+1) th cross section of the valve core; r is (r) i Radius for the ith cross section; p (P) z The sum of the pressure in the z direction of the valve core; p (P) zi The sum of the pressure in the z direction of the ith cross section of the valve core; p (P) z(i+1) The sum of the z-direction pressure of the ith cross section and the 1 st cross section of the valve core; p is the pressure value of the radial force;is the direction angle of the radial force; l is the axial length.
In one embodiment, the method further comprises:
and determining the pressure distribution curve of the valve core of the target slide valve according to the pressure vector of the radial force.
As shown in fig. 2, in practical application, the method for calculating the radial force of the spool valve according to the embodiment of the present invention may further include the following specific implementation process:
firstly, determining the structure and the size of a target slide valve, and establishing a three-dimensional physical model of a slide valve flow field.
And determining the size of the surface fluid of each part according to the structures of an oil inlet, an oil outlet, a valve core, an undercut groove, a shell, a throttle and the like of the target slide valve, and constructing a three-dimensional model of each part of the slide valve flow field by utilizing SolidWorks software.
According to the relative positions of the parts of the slide valve, assembling the fluid of the oil inlet, the oil outlet, the valve cavity and the undercut groove together, wherein the fluid of the undercut groove is concentric and in distance fit with the fluid of the valve cavity, the size of the throttle opening is determined according to the distance fit between the fluid of the undercut groove and the fluid of the valve cavity, and the angles of the oil inlet and the oil outlet are determined according to angle fit, so that an assembled three-dimensional physical model of the slide valve flow field is obtained, as shown in figure 3.
Then, grid division is carried out on the three-dimensional physical model of the sliding valve flow field, and the size and density of the grid are adjusted according to the structural characteristics of the model. I.e. the size and density of the individual grids divided. The divided grids are the cross sections of the valve cores.
Specifically, the assembled three-dimensional physical model of the sliding valve flow field is led into ICEM software, fluid at the oil port, the oil outlet, the valve cavity and the undercut groove are respectively subjected to grid division, and then grids of all the parts are combined.
The mesh size and density are adjusted according to the structural features of the model, such as the size and position of each structural portion. The flow speed and pressure at the valve port change fast, so that the simulation result with distinct pressure flow speed and flow speed layers is obtained more clearly and obviously, and the grid of the part with severe change of the flow field needs to be thinned. In addition, the simulation focuses on the pressure distribution at the outer surface of the flow field, which is in contact with the valve body, so that the grid refinement is focused on part of the outer surface of the flow field, the grid size of each contact surface is required to be small, and after the grid encryption is finished, a grid file is derived in ICEM software.
And importing the grid file into Fluent software, and performing Fluent simulation calculation by setting boundary conditions to obtain a pressure distribution cloud picture in the flow field.
According to the working condition of the target slide valve, the boundary condition of simulation calculation is determined, and the shell and the valve core surface are assumed to have no heat exchange with the fluid, and different valve port opening degrees, inlet pressure and outlet pressure are set. And according to the set boundary conditions, the model adopts a k-epsilon model, fluent fluid simulation software is carried out, simulation calculation is carried out, and a pressure distribution cloud picture in the flow field is obtained.
And importing node data in the flow field, which are in contact with the surface of the valve core, into Matlab software for processing to obtain a pressure distribution text document on the surface of the valve core, so that the subsequent calculation and analysis of the pressure vector of the radial force are facilitated.
Selecting the surface in the flow field, which is contacted with the valve core, from the obtained pressure distribution cloud chart, and deriving node data in the flow field, which is contacted with the valve core surface, and deriving file data in a text format, wherein the data is divided into five columns: the first column is the node number, the second, third and fourth columns are the coordinates of X, Y and Z axes, respectively, and the fifth column is the pressure value.
The derived pressure node data is read in Matlab software. And sequentially reading the node data according to the coordinates, wherein the read data are not strictly distributed according to the coordinates, so that the selection of the pressure data corresponding to the coordinates has certain fault tolerance in the reading process. And measuring the axial distance between adjacent nodes in the axial direction near the interface to be analyzed in Fluent fluid simulation software, and debugging the coordinate fault tolerance value within half of the measured axial distance until the nodes screened by Matlab are uniformly distributed in the circumferential direction of the interface, namely in different direction angles, and no coincident nodes exist, so that the axial coordinate fault tolerance of the interface is determined. And selecting the pressure value of the cross section closest to the corresponding coordinate as the pressure distribution of the coordinate.
The pressure direction angle is defined as shown in fig. 4-6, where letter a in fig. 4 represents a first pressure direction and letter B represents a second pressure direction.
The pressure distribution of each cross section is read to obtain the pressure distribution of each point on the cross section, as shown in fig. 7. Vector summation is carried out on the pressure distribution of each valve core cross section to obtain the magnitude and the direction of the pressure of each valve core cross section, as shown in fig. 8 and 9.
Example 2
As shown in fig. 10, an embodiment of the present invention provides a spool valve spool radial force calculation system comprising: the system comprises a data acquisition module 1, a model construction module 2, a division module 3, a simulation module 4, a function determination module 5, a solving module 6 and a calculation module 7.
A data acquisition module 1 for acquiring profile data of the target spool; the profile data includes: structure and size.
And the model construction module 2 is used for constructing a three-dimensional physical model of the sliding valve flow field according to the contour data.
The division module 3 is used for carrying out grid division on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model composed of a plurality of cross sections of the spool of the target spool valve.
The simulation module 4 is used for determining a pressure distribution vector of the finite element model in a simulation mode according to the set boundary conditions; the setting of the boundary conditions includes: valve port opening, inlet pressure, and outlet pressure.
A function determining module 5, configured to determine a solution function of the finite element model; the solving function includes a spool cross-section pressure vector summation function.
The solving module 6 is used for solving the summation function of the valve core cross section pressure vector by adopting the pressure distribution vector for any cross section in the finite element model to obtain the pressure vector of the cross section; the pressure vector includes a pressure value and a direction angle.
The calculation module 7 is used for carrying out vector summation calculation according to the pressure vectors of all the cross sections to obtain the pressure vector of the radial force of the spool of the target slide valve; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
Example 3
The embodiment of the invention provides electronic equipment, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic equipment to execute the spool radial force calculation method in the embodiment 1.
In one embodiment, there is also provided a computer-readable storage medium storing a computer program which, when executed by a processor, implements the spool radial force calculation method of embodiment 1.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (8)

1. A method of calculating a spool radial force of a spool valve, the method comprising:
acquiring profile data of a target slide valve; the profile data includes: structure and size;
constructing a three-dimensional physical model of a sliding valve flow field according to the contour data;
grid division is carried out on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model formed by a plurality of cross sections of the valve core of the target slide valve;
according to the set boundary conditions, adopting a simulation mode to determine the pressure distribution vector of the finite element model; the set boundary conditions include: valve port opening, inlet pressure, and outlet pressure;
determining a solving function of the finite element model; the solving function comprises a valve core cross section pressure vector summation function;
solving a summation function of the valve core cross section pressure vector by adopting the pressure distribution vector for any cross section in the finite element model to obtain a cross section pressure vector; the pressure vector comprises a pressure value and a direction angle;
vector summation calculation is carried out according to the pressure vectors of all cross sections, so that the pressure vector of the radial force of the valve core of the target slide valve is obtained; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
2. The spool valve spool radial force calculation method according to claim 1, wherein the calculation formula of the pressure vector of the cross section is:
wherein P is xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) zi The sum of the pressure in the z direction of the ith cross section of the valve core; x is x ij An x coordinate of a jth node of the ith cross section; z ij The z coordinate of the jth node of the ith cross section; p is p ij The pressure at the j-th node of the i-th cross section; n is the number of nodes of the cross section; r is (r) i Radius for the ith cross section; p (P) i A pressure value for the ith cross section;a direction angle which is an ith cross section; r is (r) j Is the radius of the j-th node.
3. The spool valve spool radial force calculation method according to claim 1, wherein the calculation formula of the pressure vector of the radial force is:
wherein P is x The sum of the pressure in the x direction of the valve core; m is the number of selected cross sections; alpha is the difference between the direction angles of adjacent nodes on the same cross section; p (P) xi The sum of the pressure in the x direction of the ith cross section of the valve core; p (P) x(i+1) The sum of the pressure in the x direction of the (i+1) th cross section of the valve core; r is (r) i Radius for the ith cross section; p (P) z The sum of the pressure in the z direction of the valve core; p (P) zi The sum of the pressure in the z direction of the ith cross section of the valve core; p (P) z(i+1) The sum of the z-direction pressure of the ith cross section and the 1 st cross section of the valve core; p is the pressure value of the radial force;is the direction angle of the radial force; l is the axial length.
4. The method for calculating radial force of spool valve according to claim 1, wherein the three-dimensional physical model of the spool valve flow field is meshed to obtain a finite element model, and the method specifically comprises:
nonlinear dispersion is carried out on the three-dimensional physical model of the sliding valve flow field according to set grid parameters, and a three-dimensional line distribution model is obtained;
dividing the three-dimensional line distribution model according to the set region size to obtain a plurality of cross sections;
adjusting the density and the section size of any cross section according to the profile data to obtain an adjusted cross section;
and combining all the adjusted cross sections to obtain the finite element model.
5. The spool valve spool radial force calculation method according to claim 1, further comprising:
and determining the pressure distribution curve of the valve core of the target slide valve according to the pressure vector of the radial force.
6. A spool valve spool radial force calculation system, the system comprising:
the data acquisition module is used for acquiring the profile data of the target slide valve; the profile data includes: structure and size;
the model construction module is used for constructing a sliding valve flow field three-dimensional physical model according to the contour data;
the dividing module is used for carrying out grid division on the three-dimensional physical model of the sliding valve flow field to obtain a finite element model; the finite element model is a three-dimensional physical model formed by a plurality of cross sections of the valve core of the target slide valve;
the simulation module is used for determining a pressure distribution vector of the finite element model in a simulation mode according to the set boundary conditions; the set boundary conditions include: valve port opening, inlet pressure, and outlet pressure;
the function determining module is used for determining a solving function of the finite element model; the solving function comprises a valve core cross section pressure vector summation function;
the solving module is used for solving the sum function of the valve core cross section pressure vectors by adopting the pressure distribution vector for any cross section in the finite element model to obtain the pressure vector of the cross section; the pressure vector comprises a pressure value and a direction angle;
the calculation module is used for carrying out vector summation calculation according to the pressure vectors of all the cross sections to obtain the pressure vector of the radial force of the valve core of the target slide valve; the pressure vector of the radial force is used to characterize the spool valve pair friction of the target spool valve.
7. An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to perform the spool valve spool radial force calculation method according to any one of claims 1 to 5.
8. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the spool radial force calculation method according to any one of claims 1 to 5.
CN202310674018.9A 2023-06-08 2023-06-08 Sliding valve core radial force calculation method, system, equipment and medium Pending CN116663366A (en)

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