CN112749456A - Minimum curved surface spacer and manufacturing method and manufacturing device thereof - Google Patents
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- 125000006850 spacer group Chemical group 0.000 title claims abstract description 133
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000006870 function Effects 0.000 claims description 99
- 239000007787 solid Substances 0.000 claims description 13
- 239000012466 permeate Substances 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 2
- 244000005700 microbiome Species 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 12
- 238000000502 dialysis Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009292 forward osmosis Methods 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 238000001728 nano-filtration Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
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- 230000035699 permeability Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a minimum curved surface spacer and a manufacturing method and a manufacturing device thereof, wherein the method comprises the following steps: acquiring a user demand instruction; determining a hidden function type, an materialization type and a circulation requirement corresponding to the minimum surface unit cell according to a user demand instruction; determining a corresponding implicit function equation according to the implicit function type; adjusting parameters of the implicit function equation according to the materialization type; determining the unit cell parameters of the minimum surface unit cell according to the circulation requirement and the implicit function equation after the parameters are adjusted; and determining and outputting a three-dimensional model of the spacer body according to the single cell parameters and the preset volume parameters of the spacer body. The invention forms a lattice structure with a tiny curved surface by the tiny curved surface, not only has the characteristics of low modulus, high connectivity and the like of a porous structure, but also greatly reduces the whole flow resistance of the structure due to smooth transition of the surface, improves the filtering efficiency, and in addition, the whole structure has no dead point, and reduces the risk of microorganism attachment.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a minimum curved surface spacer and a manufacturing method and a manufacturing device thereof.
Background
Filtration spacers, also called permeate spacers or feed spacers, are used in filtration devices to form a permeate space between adjacent filter elements, which on the one hand serves as a support structure for the forces acting perpendicular to the plane of the filtration device and on the other hand serves to allow the permeate to flow away along channels in the spacers. The filter devices can be generally divided into two forms, flat filters and spiral wound filters, for which minimum flow resistance and sufficient strength against deformation are generally required. The filtration spacer determines the flow path and flux of the fluid on the membrane surface, and the efficiency and economy of the filtration device, and therefore it is important to increase the permeability of the filtration spacer as much as possible and reduce the flow resistance.
A common feeding spacer structure is a flat net made of a polymer material, a metal material or a ceramic material, and the area of a mesh is 70-90%. However, this conventional structure has various disadvantages, on one hand, in practical applications, monofilaments extending obliquely or perpendicularly to the flow direction cause turbulence, increase the flow resistance of the fluid, and reduce the filtration efficiency; on the other hand, dead zones are generated at the nodes of the mesh structure, so that particles are deposited, and an ideal position is provided for the attachment and growth of microorganisms, and then the fouling is performed to reduce the transmission efficiency of the fluid. In summary, how to manufacture a filtering spacer with high filtering efficiency is an urgent problem to be solved.
Disclosure of Invention
In view of the above, it is necessary to provide a spacer with an extremely small curved surface, a manufacturing method thereof, and a manufacturing apparatus thereof, so as to solve the problem of how to manufacture a filtering spacer with high filtering efficiency.
The invention provides a minimum curved surface spacer which comprises a spacer body, wherein the spacer body comprises minimum curved surface unit cells which are arrayed in space to form a continuous curved surface shape, the minimum curved surface unit cells are used for forming a permeate space between adjacent filtering elements in a filtering device, and different quantities of the minimum curved surface unit cells are included in different directions of the spacer body.
Further, the adjustment range of the volume fraction occupied by the solid in the spacer body is between the first percentage and the second percentage.
The invention also provides a manufacturing method of the extremely-small curved surface spacer, which is used for manufacturing the extremely-small curved surface spacer and comprises the following steps:
acquiring a user demand instruction;
determining a hidden function type, an materialization type and a circulation requirement corresponding to the minimal surface unit cell according to the user demand instruction;
determining a corresponding implicit function equation according to the implicit function type;
adjusting parameters of the implicit function equation according to the materialization type;
determining the unit cell parameters of the minimum surface unit cell according to the circulation requirement and the implicit function equation after the parameters are adjusted;
and determining and outputting a three-dimensional model of the spacer body according to the unit cell parameters and the preset volume parameters of the spacer body.
Further, the implicit function types comprise an implicit function equation of a Gyroid minimum curved surface, an implicit function equation of a Diamond minimum curved surface, an implicit function equation of a Primitive minimum curved surface, an implicit function equation of a Neovius minimum curved surface and an implicit function equation of a Fischer-Koch S minimum curved surface.
Further, the materialization type includes a sheet-like structure and a rod-like structure, and the adjusting the parameters of the implicit function equation according to the materialization type includes:
if the materialization type is the sheet structure, setting a first parameter in the implicit function equation as a fixed first constant, wherein the first parameter is used for controlling the volume fraction of the infinitesimal surface unit cell;
and if the materialization type is the rod-shaped structure, setting the first parameter as a second constant according to a preset volume fraction.
Further, the determining the unit cell parameters of the infinitesimal surface unit cell according to the circulation requirement and the implicit function equation after adjusting the parameters includes:
determining unit cell size according to the flow through requirement;
determining the corresponding wall thickness according to the unit cell size, the preset volume fraction and the implicit function equation after the parameters are adjusted;
and forming corresponding unit cell parameters according to the unit cell size, the volume fraction and the wall thickness.
Further, the determining the unit cell parameter of the infinitesimal surface unit cell according to the circulation requirement and the implicit function equation after adjusting the parameter further includes:
if the materialization type is the sheet structure, giving a thickness to the curved surface of the minimum curved surface unit cell to form a minimum curved surface thin-wall solid model;
and if the materialization type is the rod-shaped structure, distinguishing the inside and the outside of the curved surface of the minimal curved surface unit cell, carrying out boundary sealing on the boundary of the inside of the curved surface, and filling the area included by the solid part to form a minimal curved surface rod-shaped solid model.
Further, the distinguishing between the inside and the outside of the curved surface of the infinitesimal curved surface unit cell, and the boundary sealing of the boundary of the inside of the curved surface comprises:
according to the implicit function equation after the parameters are adjusted, determining a first coordinate point of which the first coordinate is zero and the corresponding function value is smaller than a preset boundary parameter, wherein the first coordinate point forms a first direction boundary;
according to the implicit function equation after the parameters are adjusted, determining a second coordinate point of which a second coordinate is zero and a corresponding function value is smaller than the preset boundary parameters, wherein the second coordinate point forms a second direction boundary;
according to the implicit function equation after the parameters are adjusted, determining a third coordinate point of which a third coordinate is zero and a corresponding function value is smaller than a preset boundary parameter, wherein the third coordinate point forms a third direction boundary;
and closing the boundary according to the first direction boundary, the second direction boundary and the third direction boundary.
Further, the preset volume parameters of the spacer body include a length, a width and a height of the spacer body, and the determining and outputting the three-dimensional model of the spacer body according to the unit cell parameters and the preset volume parameters of the spacer body includes:
determining the number of first minimum curved surface unit cells of the spacer body along the length direction according to the unit cell parameters and the length;
determining the number of second polar small curved surface unit cells of the spacer body along the width direction according to the unit cell parameters and the width;
determining the number of third polar small curved surface unit cells of the spacer body along the height direction according to the unit cell parameters and the height;
and determining and outputting a three-dimensional model of the spacer body according to the unit cell parameters, the number of the first minimum curved surface unit cells, the number of the second minimum curved surface unit cells and the number of the third minimum curved surface unit cells.
Compared with the prior art, the invention has the beneficial effects that: the extremely-small curved surface spacer is characterized in that a novel filtering spacer is designed by adopting an extremely-small curved surface, a permeate space is formed between adjacent filtering elements in a filtering device, and the novel filtering spacer is used for a device for gas separation, forward osmosis, reverse osmosis, dialysis, micro-filtration, ultra-filtration or nano-filtration, and has the advantages of high strength, small flow resistance, high filtering efficiency and the like; moreover, the surface of the filter is in smooth transition, so that the integral flow resistance of the structure is greatly reduced, and the filtering efficiency is improved; and the whole structure has no dead point, so that the risk of microorganism adhesion is reduced. Meanwhile, a manufacturing method of the extremely-small curved surface spacer is provided, and firstly, a user demand instruction is effectively obtained, and the user demand is fed back; then, analyzing the implicit function type, the materialization type and the circulation requirement suitable for the application scene through a user demand instruction; furthermore, a corresponding implicit function equation is established by utilizing the implicit function type, so that a model corresponding to the single cell with the extremely small curved surface is conveniently established; then, adjusting parameters of an implicit function equation corresponding to the minimum surface unit cell in combination with an materialization type, namely in combination with the requirement of an materialization model; further, combining the circulation requirement and the implicit function equation after adjusting the parameters, jointly determining the unit cell parameters of the unit cell with the minimum curved surface, comprehensively combining the implicit function type, the materialization type and the circulation requirement, and searching the unit cell parameters which best meet the application scene requirement of a user; after the unit cell parameters of the extremely small curved surface unit cell of the spacer body are determined, the rapid and effective modeling can be carried out according to the volume parameters of the spacer body. In conclusion, the manufacturing method of the extremely-small curved surface spacer provided by the invention combines various factors, adjusts the implicit function equation, selects the unit cell parameter which best meets the requirements of the application scene of a user, constructs the basic extremely-small curved surface unit cell, further combines the requirements on the spacer body, constructs the corresponding spacer body by using the extremely-small curved surface unit cell, quickly and efficiently establishes the spacer body with low flow resistance and high filtering efficiency, and uses the structural characteristics of the extremely-small curved surface to ensure that the whole spacer body has no dead point, reduces the risk of microorganism adhesion, and has good practicability and flexibility.
Drawings
FIG. 1 is a schematic flow chart of a method for manufacturing a spacer with a very small curved surface according to the present invention;
FIG. 2 is a schematic flow chart of adjusting parameters of implicit function equations provided by the present invention;
FIG. 3 is a first schematic flow chart for determining unit cell parameters according to the present invention;
FIG. 4 is a second schematic flow chart for determining unit cell parameters according to the present invention;
FIG. 5 is a schematic flow chart of performing boundary closure according to the present invention;
FIG. 6 is a schematic flow chart of the present invention for determining a three-dimensional model;
FIG. 7 is a first diagram of a model provided by the present invention;
FIG. 8 is a second schematic diagram of the model provided by the present invention;
FIG. 9 is a third schematic diagram of a model provided by the present invention;
FIG. 10 is a fourth schematic representation of the model provided by the present invention;
FIG. 11 is a fifth schematic view of the model provided by the present invention;
FIG. 12 is a diagram of a sixth model provided by the present invention;
fig. 13 is a schematic structural diagram of an apparatus for manufacturing a spacer with a very small curved surface according to the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
The embodiment of the invention provides a minimum curved surface spacer, which comprises a spacer body, wherein the spacer body comprises minimum curved surface unit cells which are arrayed in space to form a continuous curved surface shape, the minimum curved surface unit cells are used for forming a permeate space between adjacent filtering elements in a filtering device, and the spacer body comprises different numbers of the minimum curved surface unit cells in different directions.
In the embodiment of the invention, a novel filtering spacer is designed by adopting an extremely small curved surface, a permeate space is formed between adjacent filtering elements in the filtering device, and the filtering device is used for gas separation, forward osmosis, reverse osmosis, dialysis, microfiltration, ultrafiltration or nanofiltration and has the advantages of high strength, small flow resistance, high filtering efficiency and the like; moreover, the surface of the filter is in smooth transition, so that the integral flow resistance of the structure is greatly reduced, and the filtering efficiency is improved; and the whole structure has no dead point, so that the risk of microorganism adhesion is reduced.
Preferably, the spacer body has a plurality of expansion modes, which can be divided into the following according to the types of the infinitesimal surface unit cells: gyroid (spiral icosahedron) type, Diamond type, Primitive type, Neovius type, Fischer-Koch S type, IWP type, F-RD type, D-prime type; the method can be divided into the following different modes according to the materialization of the minimum curved surface: sheet-like structures and rod-like structures. It should be noted that different minimum surface unit cell types and materialization modes are selected according to user requirements to meet different application scenarios.
Preferably, the structure of the spacer body is formed by forming a continuous curved surface shape by the extremely small curved surface unit cells in a spatial array, wherein the side length of the extremely small curved surface unit cells is preferably 1mm, 1.5mm, 2mm, 2.5mm and 3 mm; the number of unit cells of the spacer body in the thickness direction is preferably 1, 2 and 3; the number of unit cells in the length and width directions of the spacer body depends on the actual requirement, and is preferably 5, 10, 20, 50, 100, 200, 500 and 1000.
Preferably, the adjustment range of the volume fraction occupied by the entity in the septum body is between the first percentage and the second percentage. As a specific embodiment, the volume fraction of the embodiment depends on the requirement of the liquidity, and a reasonable volume fraction range is set to meet the requirement of the liquidity in different application scenes. Wherein the first percentage is preferably 5%, the second percentage is preferably 50%, the volume fraction ranges from 5% to 50%, and the preferred values of the volume fraction are 5%, 10%, 15%, 20%, 25%.
Example 2
An embodiment of the present invention provides a method for manufacturing an extremely small curved surface spacer, and referring to fig. 1, fig. 1 is a schematic flow chart of the method for manufacturing an extremely small curved surface spacer provided by the present invention, where the method for manufacturing an extremely small curved surface spacer includes steps S1 to S6, where:
in step S1, a user demand instruction is acquired;
in step S2, determining a hidden function type, an materialization type, and a circulation requirement corresponding to the minimum surface unit cell according to the user demand instruction;
in step S3, determining a corresponding implicit function equation according to the implicit function type;
in step S4, adjusting parameters of the implicit function equation according to the materialization type;
in step S5, determining a unit cell parameter of the minimum surface unit cell according to the circulation requirement and the implicit function equation after the parameter adjustment;
in step S6, a three-dimensional model of the spacer body is determined and output based on the unit cell parameter and a preset volume parameter of the spacer body.
In the embodiment of the invention, firstly, the user requirement instruction is effectively obtained, and the requirement of the user is fed back; then, analyzing the implicit function type, the materialization type and the circulation requirement suitable for the application scene through a user demand instruction; furthermore, a corresponding implicit function equation is established by utilizing the implicit function type, so that a model corresponding to the single cell with the extremely small curved surface is conveniently established; then, adjusting parameters of an implicit function equation corresponding to the minimum surface unit cell in combination with an materialization type, namely in combination with the requirement of an materialization model; further, combining the circulation requirement and the implicit function equation after adjusting the parameters, jointly determining the unit cell parameters of the unit cell with the minimum curved surface, comprehensively combining the implicit function type, the materialization type and the circulation requirement, and searching the unit cell parameters which best meet the application scene requirement of a user; after the unit cell parameters of the extremely small curved surface unit cell of the spacer body are determined, the rapid and effective modeling can be carried out according to the volume parameters of the spacer body. In conclusion, the manufacturing method of the extremely-small curved surface spacer provided by the invention combines various factors, adjusts the implicit function equation, selects the unit cell parameter which best meets the requirements of the application scene of a user, constructs the basic extremely-small curved surface unit cell, further combines the requirements on the spacer body, constructs the corresponding spacer body by using the extremely-small curved surface unit cell, quickly and efficiently establishes the spacer body with low flow resistance and high filtering efficiency, and uses the structural characteristics of the extremely-small curved surface to ensure that the whole spacer body has no dead point, reduces the risk of microorganism adhesion, and has good practicability and flexibility.
Preferably, the implicit function types include implicit function equations of Gyroid minimal surfaces, Diamond minimal surfaces, Primitive minimal surfaces, Neovius minimal surfaces and Fischer-Koch S minimal surfaces. As a specific embodiment, the implicit function equations corresponding to multiple minimum curved surfaces are set in this embodiment, in a specific embodiment, multiple implicit function equations can be stored as one database, and when a user demand instruction is obtained, the implicit function equations meeting the requirements are searched in the database, so that the purpose of quickly constructing the implicit function equations is achieved.
Preferably, the materialization type includes a sheet-like structure and a rod-like structure, and when viewed from fig. 2, fig. 2 is a schematic flow chart of adjusting parameters of the implicit function equation provided by the present invention, and the step S3 includes steps S31 to S32, where:
in step S31, if the materialization type is a sheet structure, setting a first parameter in the implicit function equation to be a fixed first constant, wherein the first parameter is used for controlling the volume fraction of the infinitesimal surface unit cell;
in step S32, if the materialization type is a rod-shaped structure, the first parameter is set to be a second constant according to the preset volume fraction.
As a specific embodiment, the embodiment distinguishes different cases of materialization, and when the materialization type is a sheet structure, a first parameter for controlling the volume fraction of the infinitesimal surface unit cell is adjusted to be a fixed first constant, wherein the first constant is preferably 0, so as to construct an effective sheet structure; when the materialization type is the rod-shaped structure, setting a first parameter according to a preset volume fraction so as to construct an effective rod-shaped structure.
Preferably, referring to fig. 3, fig. 3 is a first schematic flow chart of determining unit cell parameters provided by the present invention, and the step S4 further includes steps S41 to S43, where:
in step S41, the unit cell size is determined according to the circulation requirement;
in step S42, determining a corresponding wall thickness according to the unit cell size, the preset volume fraction, and the implicit function equation after adjusting the parameters;
in step S43, corresponding cell parameters are formed according to the unit cell size, volume fraction, and wall thickness.
As a specific embodiment, the present embodiment combines the circulation requirement and the implicit function equation after adjusting the parameters to determine the unit cell size, the volume fraction, and the wall thickness in turn, so as to form complete and effective cell parameters.
Preferably, referring to fig. 4, fig. 4 is a schematic flow chart illustrating the determining unit cell parameters provided by the present invention, and the step S4 further includes steps S44 to S45, where:
in step S44, if the materialization type is a sheet-like structure, a thickness is given to the curved surface of the minimum curved surface unit cell to form a minimum curved surface thin-wall solid model;
in step S45, if the materialization type is a rod-shaped structure, the inside and outside of the curved surface of the unit cell with the minimum curved surface are distinguished, the boundary of the inside boundary of the curved surface is sealed, and the region included in the solid portion is filled to form a rod-shaped solid model with the minimum curved surface.
As a specific embodiment, the present embodiment performs different boundary closing operations for different materialization types, so as to form a thin-wall solid model with a very small curved surface or a rod-shaped solid model with a very small curved surface, thereby meeting the requirements of different application situations.
Preferably, referring to fig. 5, fig. 5 is a schematic flowchart of the process of performing boundary closure according to the present invention, where the step S45 includes steps S451 to S454, where:
in step S451, according to the implicit function equation after the parameters are adjusted, a first coordinate point is determined, where the first coordinate is zero and the corresponding function value is smaller than the preset boundary parameter, and the first coordinate point forms a first direction boundary;
in step S452, according to the implicit function equation after the parameter adjustment, a second coordinate point is determined, where the second coordinate is zero and the corresponding function value is smaller than the preset boundary parameter, and the second coordinate point forms a second direction boundary;
in step S453, according to the implicit function equation after the parameters are adjusted, a third coordinate point is determined, where the third coordinate is zero and the corresponding function value is smaller than the preset boundary parameter, and the third coordinate point forms a third direction boundary;
in step S454, boundary closure is performed based on the first direction boundary, the second direction boundary, and the third direction boundary.
As a specific embodiment, in the case where the materialization type is a rod-like structure, the boundary in different directions is closed. Specifically, assuming that the implicit function equation is F (X, Y, Z) ═ C, then the point of F (X, Y, Z) > C is the outer side of the curved surface, otherwise the point of F (X, Y, Z) < C is the inner side of the curved surface, the algorithm is used to find the point of X ═ 0& F (X, Y, Z) < C as the X-direction boundary, find the point of Y ═ 0& F (X, Y, Z) < C as the Y-direction boundary, find the point of Z ═ 0& F (X, Y, Z) < C as the Z-direction boundary, fill the boundary with the curved surface to close, and fill the area enclosed by the inner surface with entities.
Preferably, referring to fig. 6, fig. 6 is a schematic flowchart of the process of determining the three-dimensional model provided by the present invention, and the step S6 includes steps S61 to S64, where:
in step S61, determining the first minimum number of surface unit cells of the spacer body in the length direction according to the cell parameters and the length;
in step S62, determining the number of second polar surface units of the spacer body in the width direction according to the cell parameters and the width;
in step S63, determining the number of third polar cells of the spacer body in the height direction according to the cell parameters and the height;
in step S64, a three-dimensional model of the spacer body is determined and output based on the cell parameters, the number of first minimal surface cells, the number of second minimal surface cells, and the number of third minimal surface cells.
As a specific embodiment, the number of the extremely small curved surface unit cells in different directions is determined according to the length, the width and the height respectively, so that a complete and effective three-dimensional model of the spacer body is constructed, and the user requirements are met.
In an embodiment of the present invention, referring to fig. 7, fig. 7 is a schematic diagram of a model provided by the present invention, which corresponds to a constructed Gyroid-type filter spacer, and the specific steps are as follows:
firstly, determining a hidden function equation of a Gyroid minimum curved surface as follows:
wherein, a and C are parameters for controlling the side length and volume fraction of the single cell with the minimum curved surface respectively;
secondly, if the spacer selects a sheet-shaped minimum curved surface, outputting the minimum curved surface if the parameter C is 0, and generating an entity by endowing the curved surface with a wall thickness; if the spacer selects a rod-shaped minimum curved surface, the value of the parameter C is determined according to the volume fraction;
thirdly, according to the circulation requirement, the unit cell size, the wall thickness and the volume fraction of the sheet-shaped entity are ensured, as shown in figure 7, the sheet-shaped unit cell size is 1mm, the wall thickness is 0.06mm, and the volume fraction is 15%; FIG. 7 shows a rod-shaped unit cell size of 1mm, a rod diameter of 0.21mm, and a volume fraction of 15%;
fourthly, as shown in FIG. 7, the thickness of the sheet-like and rod-like spacers is 1mm, and the length and width thereof are both 5 mm;
and fifthly, outputting the Gyroid sheet and rod-shaped extremely-small curved surface models.
In an embodiment of the present invention, referring to fig. 8, fig. 8 is a schematic diagram of a model provided by the present invention, which corresponds to a built Diamond-type filter spacer, and the specific steps are as follows:
the first step is as follows: the implicit function equation of the Diamond minimum surface is as follows:
wherein, a and C are parameters for controlling the side length and volume fraction of the single cell with the minimum curved surface respectively;
the second step is that: if the spacer selects the sheet-shaped minimum curved surface, the parameter C is equal to 0, the minimum curved surface is output, and an entity is generated by endowing the curved surface with the wall thickness; if the spacer selects a rod-shaped minimum curved surface, the value of the parameter C is determined according to the volume fraction;
the third step: according to the flow requirement, the unit cell size, the wall thickness and the volume fraction of the sheet-shaped entity are ensured, as shown in figure 8, the sheet-shaped unit cell size is 1mm, the wall thickness is 0.05mm, and the volume fraction is 15%; FIG. 8 shows a rod-shaped unit cell size of 1mm, a rod diameter of 0.13mm, and a volume fraction of 15%;
the fourth step: as shown in FIG. 8, the sheet-like and rod-like spacers have a thickness of 1mm and a length and width of 5 mm.
The fifth step: and outputting the Diamond sheet and rod-shaped extremely-small curved surface model.
In a specific embodiment of the present invention, referring to fig. 9, fig. 9 is a schematic diagram of a model provided by the present invention, which corresponds to the constructed primative type filtering spacer, and the specific steps are as follows:
the first step is as follows: the implicit function equation of the Primitive minimum curved surface is as follows:
wherein, a and C are parameters for controlling the side length and volume fraction of the single cell with the minimum curved surface respectively;
the second step is that: if the spacer selects the sheet-shaped minimum curved surface, the parameter C is equal to 0, the minimum curved surface is output, and an entity is generated by endowing the curved surface with the wall thickness; if the spacer selects a rod-shaped minimum curved surface, the value of the parameter C is determined according to the volume fraction;
the third step: according to the flow requirement, the unit cell size, the wall thickness and the volume fraction of the sheet-shaped entity are ensured, as shown in figure 9, the sheet-shaped unit cell size is 1mm, the wall thickness is 0.08mm, and the volume fraction is 15%; FIG. 9 shows a rod unit cell size of 1mm, a rod diameter of 0.22mm, and a volume fraction of 20%;
the fourth step: as shown in FIG. 9, the sheet-like and rod-like spacers have a thickness of 1mm and a length and width of 5 mm.
The fifth step: outputting Primitive sheet and rod shape extremely small curved surface model.
In a specific embodiment of the present invention, referring to fig. 10, fig. 10 is a schematic diagram of a model provided by the present invention, which corresponds to a configured neoovius type filter spacer, and the specific steps are as follows:
the first step is as follows: the implicit function equation of the Neovius minimum curved surface is as follows:
wherein, a and C are parameters for controlling the side length and volume fraction of the single cell with the minimum curved surface respectively;
the second step is that: if the spacer selects the sheet-shaped minimum curved surface, the parameter C is equal to 0, the minimum curved surface is output, and an entity is generated by endowing the curved surface with the wall thickness; if the spacer selects a rod-shaped minimum curved surface, the value of the parameter C is determined according to the volume fraction;
the third step: according to the flow requirement, the sheet-shaped entity has the unit cell size, the wall thickness and the volume fraction, as shown in FIG. 10, the sheet-shaped unit cell size is 1mm, the wall thickness is 0.05mm, and the volume fraction is 15%; FIG. 10 shows a rod-shaped unit cell size of 1mm, a rod diameter of 0.12mm, and a volume fraction of 40%;
the fourth step: as shown in FIG. 10, the sheet-like and rod-like spacers have a thickness of 1mm and a length and width of 5 mm;
the fifth step: the Neovius plate and rod models of extremely small surfaces were exported.
In one specific embodiment of the present invention, with reference to fig. 11, fig. 11 is a schematic diagram of a model provided by the present invention, corresponding to a Fischer-Koch S-type filter spacer, and the specific steps are as follows:
the first step is as follows: the implicit function equation of the Fischer-Koch S minimal surface is as follows:
wherein, a and C are parameters for controlling the side length and volume fraction of the single cell with the minimum curved surface respectively;
the second step is that: if the spacer selects the sheet-shaped minimum curved surface, the parameter C is equal to 0, the minimum curved surface is output, and an entity is generated by endowing the curved surface with the wall thickness; if the spacer selects a rod-shaped minimum curved surface, the value of the parameter C is determined according to the volume fraction;
the third step: according to the flow requirement, the sheet-shaped entity has the unit cell size, the wall thickness and the volume fraction, as shown in FIG. 11, the sheet-shaped unit cell size is 1mm, the wall thickness is 0.07mm, and the volume fraction is 30%; FIG. 11 shows a rod unit cell size of 1mm, a rod diameter of 0.1mm, and a volume fraction of 20%;
the fourth step: as shown in FIG. 11, the sheet-like and rod-like spacers have a thickness of 1mm and a length and width of 5 mm;
the fifth step: output Fischer-Koch S-plate and rod-like minimal surface models.
In an embodiment of the present invention, referring to fig. 12, fig. 12 is a sixth schematic diagram of a model provided by the present invention, and fig. 12 sequentially shows an IWP type minimal surface, an F-RD type minimal surface, and a D-prime type minimal surface from left to right.
Example 3
An embodiment of the present invention provides an apparatus for manufacturing an extremely small curved spacer, and as shown in fig. 13, fig. 13 is a schematic structural diagram of the apparatus for manufacturing an extremely small curved spacer according to the present invention, where the apparatus 1300 for manufacturing an extremely small curved spacer includes:
an obtaining unit 1301, configured to obtain a user requirement instruction;
the processing unit 1302 is configured to determine, according to a user demand instruction, a hidden function type, an materialization type, and a circulation requirement corresponding to the minimum surface unit cell; the hidden function equation is also used for determining a corresponding hidden function equation according to the hidden function type; the system is also used for adjusting parameters of the implicit function equation according to the materialization type; the method is also used for determining the unit cell parameters of the minimum surface unit cell according to the circulation requirement and the implicit function equation after the parameters are adjusted;
and the modeling unit 1303 is used for determining and outputting a three-dimensional model of the spacer body according to the unit cell parameters and the preset volume parameters of the spacer body.
Example 4
The embodiment of the invention provides a device for manufacturing a minimum curved surface spacer, which comprises a processor and a memory, wherein the memory is stored with a computer program, and the computer program is executed by the processor to realize the method for manufacturing the minimum curved surface spacer.
Example 5
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for manufacturing the extremely small curved surface spacer described above is implemented.
The invention discloses a minimum curved surface spacer and a manufacturing method and a manufacturing device thereof.A novel filtering spacer is designed by adopting a minimum curved surface, a permeate space is formed between adjacent filtering elements in a filtering device, and the device is used for gas separation, forward osmosis, reverse osmosis, dialysis, micro-filtration, ultra-filtration or nano-filtration and has the advantages of high strength, small flow resistance, high filtering efficiency and the like; moreover, the surface of the filter is in smooth transition, so that the integral flow resistance of the structure is greatly reduced, and the filtering efficiency is improved; and the whole structure has no dead point, so that the risk of microorganism adhesion is reduced. Meanwhile, a manufacturing method of the extremely-small curved surface spacer is provided, and firstly, a user demand instruction is effectively obtained, and the user demand is fed back; then, analyzing the implicit function type, the materialization type and the circulation requirement suitable for the application scene through a user demand instruction; furthermore, a corresponding implicit function equation is established by utilizing the implicit function type, so that a model corresponding to the single cell with the extremely small curved surface is conveniently established; then, adjusting parameters of an implicit function equation corresponding to the minimum surface unit cell in combination with an materialization type, namely in combination with the requirement of an materialization model; further, combining the circulation requirement and the implicit function equation after adjusting the parameters, jointly determining the unit cell parameters of the unit cell with the minimum curved surface, comprehensively combining the implicit function type, the materialization type and the circulation requirement, and searching the unit cell parameters which best meet the application scene requirement of a user; after the unit cell parameters of the extremely small curved surface unit cell of the spacer body are determined, the rapid and effective modeling can be carried out according to the volume parameters of the spacer body.
According to the technical scheme, factors in multiple aspects are combined, a implicit function equation is adjusted, unit cell parameters which best meet requirements of a user application scene are selected, basic unit cells with the minimum curved surface are constructed, requirements for the spacer body are further combined, the corresponding spacer body is constructed by the unit cells with the minimum curved surface, the spacer body with low flow resistance and high filtering efficiency is quickly and efficiently established, no dead point is formed in the whole by the structural characteristics of the minimum curved surface, the risk of microorganism adhesion is reduced, and the method has good practicability and flexibility.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The extremely-small-curved-surface spacer is characterized by comprising a spacer body, wherein the spacer body comprises extremely-small-curved-surface unit cells which are arrayed in space to form a continuous curved surface shape and are used for forming a permeate space between adjacent filtering elements in a filtering device, and different numbers of the extremely-small-curved-surface unit cells are included in different directions of the spacer body.
2. The extremely small curved spacer as set forth in claim 1, wherein the volume fraction of the solid in the spacer body is adjusted in a range between a first percentage and a second percentage.
3. A method for producing a very small curved surface spacer according to any one of claims 1 to 2, comprising:
acquiring a user demand instruction;
determining a hidden function type, an materialization type and a circulation requirement corresponding to the minimal surface unit cell according to the user demand instruction;
determining a corresponding implicit function equation according to the implicit function type;
adjusting parameters of the implicit function equation according to the materialization type;
determining the unit cell parameters of the minimum surface unit cell according to the circulation requirement and the implicit function equation after the parameters are adjusted;
and determining and outputting a three-dimensional model of the spacer body according to the unit cell parameters and the preset volume parameters of the spacer body.
4. The method for manufacturing a very small curved surface spacer according to claim 3, wherein the implicit function types include implicit function equation of Gyroid very small curved surface, implicit function equation of Diamond very small curved surface, implicit function equation of Primitive very small curved surface, implicit function equation of Neovius very small curved surface, and implicit function equation of Fischer-Koch S very small curved surface.
5. The method for manufacturing an extremely small curved surface spacer according to claim 3, wherein the materialization type comprises a sheet-like structure and a rod-like structure, and the adjusting the parameters of the implicit function equation according to the materialization type comprises:
if the materialization type is the sheet structure, setting a first parameter in the implicit function equation as a fixed first constant, wherein the first parameter is used for controlling the volume fraction of the infinitesimal surface unit cell;
and if the materialization type is the rod-shaped structure, setting the first parameter as a second constant according to a preset volume fraction.
6. The method for manufacturing a minimal curved surface spacer according to claim 3, wherein the determining the unit cell parameters of the minimal curved surface unit cell according to the circulation requirement and the implicit function equation after adjusting the parameters comprises:
determining unit cell size according to the flow through requirement;
determining the corresponding wall thickness according to the unit cell size, the preset volume fraction and the implicit function equation after the parameters are adjusted;
and forming corresponding unit cell parameters according to the unit cell size, the volume fraction and the wall thickness.
7. The method for making a curved infinitesimal spacer according to claim 6, wherein the determining the unit cell parameters of the curved infinitesimal cell according to the flux requirement and the implicit function equation after adjusting the parameters further comprises:
if the materialization type is the sheet structure, giving a thickness to the curved surface of the minimum curved surface unit cell to form a minimum curved surface thin-wall solid model;
and if the materialization type is the rod-shaped structure, distinguishing the inside and the outside of the curved surface of the minimal curved surface unit cell, carrying out boundary sealing on the boundary of the inside of the curved surface, and filling the area included by the solid part to form a minimal curved surface rod-shaped solid model.
8. The method for manufacturing a minimal curved surface spacer according to claim 7, wherein the distinguishing between the inside and the outside of the curved surface of the minimal curved surface unit cell and the boundary sealing of the boundary of the inside of the curved surface comprises:
according to the implicit function equation after the parameters are adjusted, determining a first coordinate point of which the first coordinate is zero and the corresponding function value is smaller than a preset boundary parameter, wherein the first coordinate point forms a first direction boundary;
according to the implicit function equation after the parameters are adjusted, determining a second coordinate point of which a second coordinate is zero and a corresponding function value is smaller than the preset boundary parameters, wherein the second coordinate point forms a second direction boundary;
according to the implicit function equation after the parameters are adjusted, determining a third coordinate point of which a third coordinate is zero and a corresponding function value is smaller than a preset boundary parameter, wherein the third coordinate point forms a third direction boundary;
and closing the boundary according to the first direction boundary, the second direction boundary and the third direction boundary.
9. The method for manufacturing a minimum curved surface spacer according to claim 3, wherein the preset volume parameters of the spacer body include a length, a width and a height of the spacer body, and the determining and outputting the three-dimensional model of the spacer body according to the unit cell parameters and the preset volume parameters of the spacer body comprises:
determining the number of first minimum curved surface unit cells of the spacer body along the length direction according to the unit cell parameters and the length;
determining the number of second polar small curved surface unit cells of the spacer body along the width direction according to the unit cell parameters and the width;
determining the number of third polar small curved surface unit cells of the spacer body along the height direction according to the unit cell parameters and the height;
and determining and outputting a three-dimensional model of the spacer body according to the unit cell parameters, the number of the first minimum curved surface unit cells, the number of the second minimum curved surface unit cells and the number of the third minimum curved surface unit cells.
10. An apparatus for manufacturing an extremely small curved spacer, comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is executed by the processor to realize the method for manufacturing an extremely small curved spacer according to any one of claims 3 to 9.
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