CN117968439A - Flow equipartition seal head of heat exchanger and design method thereof - Google Patents
Flow equipartition seal head of heat exchanger and design method thereof Download PDFInfo
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- CN117968439A CN117968439A CN202410381253.1A CN202410381253A CN117968439A CN 117968439 A CN117968439 A CN 117968439A CN 202410381253 A CN202410381253 A CN 202410381253A CN 117968439 A CN117968439 A CN 117968439A
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- 238000013461 design Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 101
- 238000012360 testing method Methods 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 11
- 238000010146 3D printing Methods 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000110 selective laser sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0263—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- 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
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- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of heat exchangers, and discloses a heat exchanger flow equipartition seal head and a design method thereof, wherein the heat exchanger flow equipartition seal head comprises the following components: the inner member is arranged in the outer package; the outer package includes: the device comprises a connecting pipe and a pipe box, wherein one end of the connecting pipe is connected with an external pipeline, a connecting hole is formed in the pipe box, and the other end of the connecting pipe is fixedly connected with the pipe box and is communicated with the inside of the pipe box through the connecting hole; the inner member is arranged in the pipe box and is fixedly connected with the inner side of the pipe box; according to the invention, aiming at the characteristics of large flow channel quantity in the micro-channel heat exchanger and weak flow capacity of conventional seal heads, the inner member with the multi-layer distribution cavity is designed, so that a complex flow guide structure is used in the seal heads, fluid entering the seal heads can be distributed for multiple times, the uniformity of the flow quantity in the heat exchanger is improved, the situation of blockage or excessive abrasion at a certain position of the heat exchanger is avoided, and the heat exchange efficiency of the heat exchanger is improved.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a flow equipartition seal head of a heat exchanger and a design method thereof.
Background
The heat exchanger is universal process equipment for allocating energy among different material flows and completing heat transport, is widely applied to a large number of industries such as power generation, chemical industry, power, metallurgy and the like, and particularly in a power circulation system taking supercritical carbon dioxide as a working medium, and plays an important role in transferring and allocating energy among the working mediums.
Along with the continuous improvement of the technology level, people pay more and more attention to special application scenes of power systems related to nuclear power plants, thermal power stations and aeroengines, and the heat exchanger has the advantages of reducing the equipment size, improving the efficiency, reducing the equipment manufacturing and operating cost and reducing the natural resource consumption, so that the heat exchanger is one of the future development directions.
The heat exchangers currently used in the conventional industrial field mainly comprise shell-and-tube heat exchangers, double-tube heat exchangers, plate-fin heat exchangers and the like, and the heat exchangers cannot simultaneously meet the requirements of large heat exchange specific surface area, high welding strength and small volume. In recent years, along with the improvement of the industrial manufacturing level, a micro-channel heat exchanger with high-precision chemical etching and vacuum diffusion welding as process cores gradually goes to an application stage, and the micro-channel heat exchanger has the advantages of small size, high compactness, no welding slag in a welding mode, and strength of a joint close to that of a base metal, and has obvious advantages. However, in the process of actually testing the micro-channel heat exchanger, it is found that the heat transfer performance of the micro-channel heat exchanger is reduced after a period of use, so that the micro-channel heat exchanger needs to be frequently maintained or replaced in order to ensure normal operation.
Disclosure of Invention
The invention aims to provide a flow equalization seal head of a heat exchanger and a design method thereof, which aims to solve the technical problem that the service life of a micro-channel heat exchanger is short, improve the flow uniformity in the micro-channel heat radiator, reduce the blockage and abrasion of the micro-channel heat radiator and prolong the service life.
The invention is realized by the following technical scheme:
a heat exchanger flow equalization head comprising: an outer wrapper and an inner member disposed within the outer wrapper;
The overwrap includes: the pipe box is provided with a connecting hole, the other end of the connecting pipe is fixedly connected with the pipe box, and the connecting pipe is communicated with the inside of the pipe box through the connecting hole;
the inner member is arranged in the pipe box and is fixedly connected with the inner side of the pipe box.
Optionally, the diameter of the connecting hole is equal to the inner diameter of the connecting pipe, and the central axis of the connecting hole coincides with the central axis of the connecting pipe.
Specifically, the inner member includes: the upper end of the primary distribution cylinder is connected with the connecting hole, the lower end of the primary distribution cylinder is arranged in the pipe box, the inner diameter of the upper end of the primary distribution cylinder is larger than that of the lower end of the primary distribution cylinder, and a plurality of communication holes are formed in the side wall of the primary distribution cylinder;
The secondary distribution assembly is fixedly connected with the outer side face of the primary distribution cylinder, a distribution cavity is formed in the secondary distribution assembly, and the distribution cavity is communicated with the interior of the primary distribution cylinder through the communication hole.
Specifically, the secondary distribution assembly comprises a plurality of secondary distribution plates, the plurality of secondary distribution plates are sequentially stacked along the central axis of the primary distribution cylinder, and a gap is arranged between two adjacent secondary distribution plates, wherein the gap is the distribution cavity;
The secondary distribution piece is fixedly connected with the outer side face of the primary distribution cylinder.
Optionally, the secondary distribution piece comprises a piece body and a plurality of micropores arranged on the piece body, wherein the micropores are one or more of round holes, rectangular holes, triangular holes and strip-shaped holes.
Optionally, a mounting hole for the primary distribution cylinder to pass through is formed in the top of the secondary distribution plate, and the bottom surface of the secondary distribution plate and the bottom surface of the pipe box are located on the same plane.
Preferably, the side of the tube box is a geometric curve, and the secondary distribution piece is also a geometric curve parallel to the side of the tube box.
Optionally, the thickness of the primary dispensing cylinder and the secondary dispensing sheet is 0.1 mm-0.2 mm.
Specifically, the inner member is integrally formed through 3D printing, the outer package is formed through welding, and the inner member is fixedly connected with the outer package through a welding technology.
A design method of a flow equipartition seal head of a heat exchanger comprises the following steps:
Designing an outer package, designing an inner member and testing a sample;
the design method of the outer package comprises the following steps:
determining design pressure and design temperature, and determining the sizes of the connecting pipe and the pipe box according to GB 150;
machining to obtain a connecting pipe and a pipe box;
welding and assembling the connecting pipe and the pipe box;
The design method of the inner member comprises the following steps:
Determining an operation working medium, an operation parameter and a design pressure drop;
Determining the shape, the communication hole and the size of the primary distribution cylinder;
Determining micropore design of the secondary distribution plates according to the physical range of the working medium, and determining the number and arrangement of the secondary distribution plates according to the design pressure drop;
3D printing of the inner member is carried out after the three-dimensional modeling;
the method for testing the sample comprises the following steps:
Obtaining the processed outer package and inner member, and welding and connecting the outer package and the inner member to obtain a sample;
carrying out bearing test on the sample, and if the bearing test does not have a through hole, carrying out the design of the outer package again;
performing a flow resistance test on the sample, and if the flow resistance test fails, re-performing the design of the inner member;
And if the pressure-bearing test and the flow resistance test are passed, the design of the flow sharing seal head of the heat exchanger is completed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
According to the invention, aiming at the characteristics of large flow channel quantity in the micro-channel heat exchanger and weak flow capacity of conventional seal heads, the inner member with the multi-layer distribution cavity is designed, so that a complex flow guide structure is used in the seal heads, fluid entering the seal heads can be distributed for multiple times, the uniformity of the flow quantity in the heat exchanger is improved, the situation of blockage or excessive abrasion at a certain position of the heat exchanger is avoided, and the heat exchange efficiency of the heat exchanger is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is an exploded schematic view of a flow equalization head of a heat exchanger according to the present invention.
Fig. 2 is a cross-sectional view of a heat exchanger flow equalization head according to the present invention.
Fig. 3 is a schematic flow chart of a design method of a flow equalization seal head of a heat exchanger according to the present invention.
Fig. 4 is a schematic layout of micro-holes of a secondary distribution assembly according to the present invention.
Reference numerals: 1-connecting pipe, 2-pipe box, 3-primary distributing cylinder and 4-secondary distributing component.
Detailed Description
The present invention will be described in further detail with reference to the drawings and embodiments, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It is to be understood that the specific embodiments described herein are merely illustrative of the substances, and not restrictive of the invention.
It should be further noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Embodiments of the present invention and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The micro-channel heat exchanger has tiny and huge channels, the flow rate of working medium is higher under the operating condition, and the damage rate of the micro-channel heat exchanger is higher, so that research on the damaged micro-channel heat exchanger discovers that when a conventional single semi-cylindrical seal head is used, the blocking and wearing degree of the heat exchanger is related to the position, and through fluid analysis on the heat exchanger, the local flow of the fluid at different positions is different, the blocking and wearing are more easily caused at the position with larger flow, and the heat transfer performance is also affected when the heat exchanger is intact due to uneven flow.
Therefore, in order to solve the above technical problems, the present embodiment provides means for improving the uniformity of fluid flow distribution in a microchannel heat exchanger, optimizing heat exchanger operating parameters, and reducing design and actual operating gap.
Example 1
As shown in fig. 1 and 2, a heat exchanger flow equalization head includes: the inner member is arranged in the outer package; the outer wrapping piece is used for wrapping and restraining working fluid from entering and exiting the heat exchanger and ensuring that the fluid is not leaked; the inner member is used for guiding the working fluid which is shunted into the end socket, so that the flow in the end socket is uniformly distributed.
The outer package includes: the pipe box comprises a connecting pipe 1 and a pipe box 2, wherein one end of the connecting pipe 1 is connected with an external pipeline, a connecting hole is formed in the pipe box 2, and the other end of the connecting pipe 1 is fixedly connected with the pipe box 2 and is communicated with the inside of the pipe box 2 through the connecting hole; the inner member is arranged in the pipe box 2 and is fixedly connected with the inner side of the pipe box 2.
The pipe connecting box 1 is a seamless circular pipe, the pipe box 2 is a metal shell formed after splicing welding or forging digging, connecting holes are dug at the position of the pipe connecting box 1, the two parts are connected into a whole through conventional welding, in order to enable fluid to flow into the pipe box 2 more stably, the diameter of the connecting holes is designed to be equal to the inner diameter of the pipe connecting box 1, and the central axes of the connecting holes are coincident with the central axes of the pipe connecting box 1.
The inner member includes: the primary distribution cylinder 3 and the secondary distribution assembly 4, the upper end and the connecting hole of primary distribution cylinder 3 are connected, and the lower extreme setting of primary distribution cylinder 3 is in tube case 2, and the upper end internal diameter of primary distribution cylinder 3 is greater than the lower extreme internal diameter of primary distribution cylinder 3, and the lateral wall of primary distribution cylinder 3 is provided with a plurality of communication holes. The primary distribution cylinder 3 is designed into a conical cylinder structure, so that most of the fluid entering from the connecting pipe 1 passes through the communication holes, and only a small amount of the fluid is allowed to directly enter the heat exchanger.
The secondary distribution component 4 is fixedly connected with the outer side surface of the primary distribution cylinder 3, a distribution cavity is arranged in the secondary distribution component 4, and the distribution cavity is communicated with the interior of the primary distribution cylinder 3 through a communication hole. The secondary distribution assembly 4 comprises a plurality of secondary distribution plates which are sequentially stacked along the central axis of the primary distribution cylinder 3, and a gap is arranged between two adjacent secondary distribution plates, wherein the gap is a distribution cavity; the secondary distribution piece is fixedly connected with the outer side surface of the primary distribution cylinder 3.
In this embodiment, the secondary distribution plate may be two trapezoidal plates, which are connected in pairs to two sides of the primary distribution cylinder 3 and bent into a structure similar to the tube box 2, so that the fluid having been distributed at the first flow rate passes through the communication hole and then enters the distribution cavity.
As shown in fig. 4, for further secondary flow distribution, the secondary distribution sheet includes a sheet body and a plurality of micro holes provided on the sheet body, and the micro holes are one or more of circular holes, rectangular holes, triangular holes and bar holes. The top of the secondary distribution piece is provided with a mounting hole for the primary distribution cylinder 3 to pass through, the bottom surface of the secondary distribution piece and the bottom surface of the pipe box 2 are positioned on the same plane, the positions and the number of the micropores are optimized according to the working medium running condition, and the size layout mode of the micropores is changed.
In this embodiment, the inner member may be obtained by machining, and if machining is used, the through-holes and the micro-holes are machined by machining or chemical etching.
In addition, the inner member can be integrally formed through 3D printing, the outer wrapping piece is formed through welding, and the inner member is fixedly connected with the outer wrapping piece through a welding technology.
1. The processing technology of the secondary distribution sheet comprises Selective Laser Sintering (SLS), fused Deposition (FDM), laser melting (SLM), electron Beam Melting (EBM) and other technologies in metal 3D printing, and when the structure is simpler, the processing can also be performed by using a method of combining mechanical punching and drilling.
In the embodiment, the pipe uses a metal pipeline with various shapes such as a circle, a square and the like, the pipe box 2 uses a shell with various geometric curves such as a semicircle, a parabola and a hyperbola in section, and different shapes are suitable for fluid working media with different flow rate ranges and can be improved according to actual running conditions;
That is, the side surface of the tube box 2 is a geometric curve surface, and the secondary distribution sheet is also a geometric curve surface parallel to the side surface of the tube box 2.
The thickness of the primary distribution cylinder 3 and the secondary distribution sheet is 0.1 mm-0.2 mm, and the heat exchanger head is suitable for different design pressure and flow impact environments so as to optimize the weight of the heat exchanger head.
Example two
As shown in fig. 3, a design method of a flow sharing seal head of a heat exchanger is provided, which includes: outer wrap design, inner member design, and sample testing.
The design method of the outer package comprises the following steps:
determining the design pressure and the design temperature, and determining the sizes of the connecting pipe 1 and the pipe box 2 according to GB 150; including the inner diameter of the adapter tube 1, the wall thickness of the tube housing 2, etc.
Machining to obtain a connecting pipe 1 and a pipe box 2;
Welding and assembling the connecting pipe 1 and the pipe box 2;
The design method of the inner member comprises the following steps:
Determining an operation working medium, an operation parameter and a design pressure drop;
determining the shape, the communication holes and the size of the primary distribution cylinder 3;
Determining micropore design of the secondary distribution plates according to the physical range of the working medium, and determining the number and arrangement of the secondary distribution plates according to the design pressure drop; by solving constitutive equation of the operation working medium, physical parameters such as viscosity, density and the like of the operation working medium under the operation working condition are calculated, and the larger the viscosity and the density is, the larger the flow resistance of the working medium is. The micropore diameter and the viscosity of the working medium are in a logarithmic function relation, namely the larger the viscosity is, the larger the micropore diameter is, but the increasing speed of the micropore diameter is gradually reduced, and the micropore number of the secondary distribution sheet and the density of the working medium are in a proportional relation, namely the larger the density is, the more the micropore number is. According to the input design pressure drop of the heat exchanger seal head, the arrangement quantity of the secondary distribution plates and the size of the primary distribution cylinder 3 are determined through calculation of an orifice plate type local resistance formula.
3D printing of the inner member is carried out after the three-dimensional modeling;
the method for testing the sample comprises the following steps:
Obtaining the processed outer package and inner member, and welding and connecting the outer package and the inner member to obtain a sample;
carrying out bearing test on the sample, and if the bearing test does not have a through hole, carrying out the design of the outer package again;
performing a flow resistance test on the sample, and if the flow resistance test fails, re-performing the design of the inner member;
And if the pressure-bearing test and the flow resistance test are passed, the design of the flow sharing seal head of the heat exchanger is completed.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by persons skilled in the art that the above embodiments are provided for clarity of illustration only and are not intended to limit the scope of the invention. Other variations or modifications of the above-described invention will be apparent to those of skill in the art, and are still within the scope of the invention.
Claims (10)
1. The utility model provides a heat exchanger flow divides head equally which characterized in that includes: an outer wrapper and an inner member disposed within the outer wrapper;
The overwrap includes: the pipe box comprises a connecting pipe (1) and a pipe box (2), wherein one end of the connecting pipe (1) is connected with an external pipeline, a connecting hole is formed in the pipe box (2), the other end of the connecting pipe (1) is fixedly connected with the pipe box (2), and the connecting hole is communicated with the inside of the pipe box (2);
The inner member is arranged in the pipe box (2) and is fixedly connected with the inner side of the pipe box (2).
2. A heat exchanger flow equalization head as claimed in claim 1, wherein the diameter of said connection hole is equal to the inner diameter of said connection tube (1), and the central axis of said connection hole coincides with the central axis of said connection tube (1).
3. The heat exchanger flow equalization head as recited in claim 1 wherein said inner member comprises: the primary distribution cylinder (3) and the secondary distribution assembly (4), wherein the upper end of the primary distribution cylinder (3) is connected with the connecting hole, the lower end of the primary distribution cylinder (3) is arranged in the pipe box (2), the inner diameter of the upper end of the primary distribution cylinder (3) is larger than that of the lower end of the primary distribution cylinder (3), and a plurality of communication holes are formed in the side wall of the primary distribution cylinder (3);
The secondary distribution assembly (4) is fixedly connected with the outer side face of the primary distribution cylinder (3), a distribution cavity is formed in the secondary distribution assembly (4), and the distribution cavity is communicated with the interior of the primary distribution cylinder (3) through the communication hole.
4. A heat exchanger flow equalization head according to claim 3, wherein the secondary distribution assembly (4) comprises a plurality of secondary distribution plates, a plurality of the secondary distribution plates are sequentially stacked along the central axis of the primary distribution cylinder (3), and a gap is arranged between two adjacent secondary distribution plates, wherein the gap is the distribution cavity;
the secondary distribution piece is fixedly connected with the outer side face of the primary distribution cylinder (3).
5. The heat exchanger flow equalization head as recited in claim 4 wherein said secondary distribution plate comprises a plate body and a plurality of micro-holes disposed on said plate body, said micro-holes being one or more of circular holes, rectangular holes, triangular holes, and bar holes.
6. The heat exchanger flow equalization head as recited in claim 4, wherein a mounting hole for the primary distribution cylinder (3) to pass through is provided at the top of the secondary distribution plate, and the bottom surface of the secondary distribution plate is located on the same plane as the bottom surface of the tube box (2).
7. A heat exchanger flow equalization head as claimed in claim 4, wherein the side of said tube box (2) is a geometric curve and said secondary distribution plate is also a geometric curve parallel to the side of said tube box (2).
8. The heat exchanger flow equalization head as recited in claim 4, wherein said primary distribution cylinder (3) and said secondary distribution plate have a thickness of 0.1mm to 0.2mm.
9. The heat exchanger flow equalization head as recited in claim 1 wherein said inner member is integrally formed by 3D printing, said outer wrap is formed by welding, and said inner member is fixedly connected to said outer wrap by welding.
10. The design method of the flow equipartition seal head of the heat exchanger is characterized by comprising the following steps:
Designing an outer package, designing an inner member and testing a sample;
the design method of the outer package comprises the following steps:
determining a design pressure and a design temperature, and determining the sizes of the connecting pipe (1) and the pipe box (2) according to GB 150;
machining to obtain a connecting pipe (1) and a pipe box (2);
welding and assembling the connecting pipe (1) and the pipe box (2);
The design method of the inner member comprises the following steps:
Determining an operation working medium, an operation parameter and a design pressure drop;
determining the shape, the communication hole and the size of the primary distribution cylinder (3);
Determining micropore design of the secondary distribution plates according to the physical range of the working medium, and determining the number and arrangement of the secondary distribution plates according to the design pressure drop;
3D printing of the inner member is carried out after the three-dimensional modeling;
the method for testing the sample comprises the following steps:
Obtaining the processed outer package and inner member, and welding and connecting the outer package and the inner member to obtain a sample;
carrying out bearing test on the sample, and if the bearing test does not have a through hole, carrying out the design of the outer package again;
performing a flow resistance test on the sample, and if the flow resistance test fails, re-performing the design of the inner member;
And if the pressure-bearing test and the flow resistance test are passed, the design of the flow sharing seal head of the heat exchanger is completed.
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| CN202410381253.1A CN117968439B (en) | 2024-04-01 | 2024-04-01 | Flow equipartition seal head of heat exchanger and design method thereof |
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| CN202410381253.1A CN117968439B (en) | 2024-04-01 | 2024-04-01 | Flow equipartition seal head of heat exchanger and design method thereof |
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| CN117968439B CN117968439B (en) | 2024-06-04 |
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| CN113804029A (en) * | 2021-09-23 | 2021-12-17 | 哈尔滨工业大学 | Side income formula head structure suitable for small passageway plate heat exchanger |
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