CN214746592U - Heat exchanger and pressure shell integrated structure for Stirling device - Google Patents
Heat exchanger and pressure shell integrated structure for Stirling device Download PDFInfo
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- CN214746592U CN214746592U CN202121020612.9U CN202121020612U CN214746592U CN 214746592 U CN214746592 U CN 214746592U CN 202121020612 U CN202121020612 U CN 202121020612U CN 214746592 U CN214746592 U CN 214746592U
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Abstract
The utility model discloses a heat exchanger and pressure shell integral type structure for stirling device, including the pressure shell body, pressure shell body upper portion is the fretwork heat transfer structure that is formed by multiunit column portion, column portion is along pressure shell body circumference evenly distributed, every group column portion includes two inside and outside column monomers, be equipped with the elongated hole runner along its length direction in the column monomer, the one end of two elongated hole runners of every group column monomer is at this internal top intercommunication of pressure shell, wherein the other end of interior week elongated hole runner communicates with the inflation chamber that pressure shell body lower part and ejector enclose, the other end of periphery elongated hole runner borders on the terminal surface of regenerator. The heat exchanger and pressure shell integrated structure can be formed by adopting two modes of machining and casting, the casting forming scheme does not need welding, the air tightness is excellent, the large-scale production cost is low, the reliability and the service life of the Stirling device can be obviously improved, and the heat exchanger and pressure shell integrated structure is particularly suitable for being applied to large and medium Stirling devices.
Description
Technical Field
The utility model belongs to the technical field of the stirling device technique and specifically relates to a heat exchanger and pressure shell integral type structure for stirling device.
Background
The Stirling device takes Stirling cycle as a working principle and is a closed cycle machine working based on the temperature difference of a heat source; the working medium is usually helium, which is friendly to the environment. The use of the composition is divided into two categories: the Stirling engine adopts a forward Stirling cycle, working media in the device absorb heat at high temperature for expansion and carry out heat compression at normal temperature, and the obtained expansion work is greater than the compression work, so that the heat energy is converted into mechanical energy; the device which adopts reverse Stirling cycle is called as a Stirling refrigerator, mechanical energy is consumed by the device to realize heat release compression of working medium at normal temperature, and heat absorption expansion at low temperature generates a refrigeration effect. The Stirling device and an external heat source exchange heat in a partition wall manner, so that the engine can adapt to various heat source types such as gas, liquid and solid fuels, medium and high temperature waste heat, solar photo-thermal energy, nuclear reactor heat energy and the like, and is suitable for being applied to scenes such as underwater power, space power, solar disc type power generation, combined heat and power supply and the like; the refrigerator is applied to the fields of infrared and superconducting device cooling, biological and medical refrigeration cold chain and the like.
At least two movers are required inside the stirling machine to achieve the volume change of the expansion chamber and the compression chamber. The rotor with the end part close to the compression cavity is called a power piston or a compression piston, and the rotor with the end part close to the expansion cavity is called an ejector or a gas distribution piston; the reciprocating motion of the two rotors can drive the working medium to reciprocate between the expansion cavity and the compression cavity through the mutually adjacent heat exchanger, the heat regenerator and the cooler runner, and the pressure of the working medium can undergo periodic change asynchronous with the displacement of the rotors in the process, so that heat power conversion is generated. The cooler is arranged between the compression cavity and the normal-temperature end face of the regenerator, is usually in a partition wall fin type or shell-and-tube type, and carries and releases compression heat generated by the working medium in the compression process through external air flow or water flow.
The heat exchanger is arranged between the expansion cavity and the non-normal-temperature end face of the heat regenerator, and in a small Stirling refrigerator, because the load of the heat exchanger is small, a fin structure or copper foil is brazed on the inner wall of the pressure shell after being folded and formed, so that the application requirement can be met. For large-scale machines, particularly high-power Stirling engines, the heat exchanger needs to bear a large heat exchange load, and the heat exchange amount can reach dozens or even hundreds of kilowatts. Only the working medium flowing out of the heat regenerator is fully heated before entering the expansion cavity for expansion, the efficiency index with engineering significance can be realized, and therefore, the large and medium-sized Stirling device generally adopts a tube bundle type heat exchanger, the tube bundle type structure has the advantages that the internal empty volume is smaller, the heat exchange external surface area is larger, the distance of the working medium flowing in the tube is longer, and the heat exchange is full. The method has the disadvantages that two ends of each pipe in the pipe bundle need to be welded at corresponding positions on the pressure shell, and dozens to hundreds of welding points are usually formed, so that the assembly and welding processes are complicated; and the welding spot is easy to crack and lose efficacy under the dual actions of thermal stress and internal alternating air pressure. Therefore, the method is not suitable for being applied to scenes which require high reliability, long service life and maintenance-free requirements.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a heat exchanger and pressure shell integral type structure for stirling device, this heat exchanger unites two into one two heat exchanger and two solitary components of pressure shell with pressure shell integral type structure, processes into the partly of pressure shell with the heat exchanger, remains the advantage of tube bank type heat exchanger, avoids it not enough. The heat exchanger and pressure shell integrated structure can be formed by adopting two modes of machining and casting, the casting forming scheme does not need welding, the air tightness is excellent, the reliability is high, the volume production cost is low, and the service life and the cost performance of the Stirling device can be effectively improved; the machining and forming scheme has short processing period and easily adjustable parameters, and is suitable for model machine development and small-batch production.
The utility model provides a heat exchanger and pressure shell integral type structure for stirling device, includes the pressure shell body, and pressure shell body upper portion is the fretwork heat transfer structure who is formed by multiunit column portion, column portion is along pressure shell body circumference evenly distributed, and every group column portion includes two inside and outside column monomers, be equipped with the elongated hole runner along its length direction in the column monomer, the one end of two elongated hole runners of every group column monomer is at this internal top intercommunication of pressure shell, and wherein the other end of interior week elongated hole runner communicates with the inflation chamber that pressure shell body lower part and ejector enclose, and the other end of periphery elongated hole runner borders on the terminal surface of regenerator.
Preferably, the diameter of the elongated hole flow passage is 2-4 mm.
Preferably, the pressure shell further comprises an annular embedded part, the annular embedded part is arranged at the top in the pressure shell body and comprises an annular base and 180-degree elbow pipelines, a semicircular groove matched with the 180-degree elbow pipelines is uniformly formed in one side of the annular base along the circumference, the 180-degree elbow pipelines are clamped in the semicircular groove, and two ends of the 180-degree elbow pipelines are communicated with two elongated hole runners in the same group of cylindrical units.
Preferably, the melting point of the annular embedded part is higher than that of the pressure shell body.
Preferably as above-mentioned technical scheme, the pressure shell body includes top cap, pressure shell main part, the top cap welding is at pressure shell main part top, the column position is in the pressure shell main part, the top cap is just evenly being equipped with the bar groove along the circumference to one side of pressure shell main part, the pore that the bar groove and pressure shell main part enclose is used for communicateing two elongated hole runners in every group column monomer.
Preferably, in the above technical solution, the middle part of the columnar part is provided with an annular reinforcing rib parallel to the top cover.
Preferably, in the above-described aspect, the columnar monomer is an irregular pentagon.
The beneficial effects of the utility model reside in that:
1. this heat exchanger and pressure shell integral type structure unites two into one two heat exchanger and two solitary components of pressure shell, and the partly of pressure shell is processed into with the heat exchanger, when having remain traditional tube bank type heat exchanger advantage, has avoided its not enough of volatile effect.
2. The heat exchanger and the pressure shell integrated structure of two different types can be produced and processed by adopting a machining mode and a casting mode respectively. Because the casting needs the die sinking, the trial-manufacturing cycle is long, changes the mould, repaiies the mould with high costs, in order to reduce the development cost in earlier stage and the bad potential risk of parameter, can utilize the structural style of machining to develop earlier and match, optimize pressure shell body and fretwork heat transfer structure's structural parameter, provide data support for the structural style of casting mode processing, after guaranteeing that heat exchanger and pressure shell integral type structural style can reach practical application and require, adopt the casting type to carry out the volume production.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Fig. 2 is a longitudinal sectional view of the first embodiment.
Fig. 3 is a schematic structural diagram of a ring-shaped embedded part in the first embodiment.
Fig. 4 is a schematic structural diagram of the second embodiment.
Fig. 5 is a longitudinal sectional view of the second embodiment.
Fig. 6 is a transverse sectional view of the second embodiment.
FIG. 7 is a schematic cross-sectional view of the first milling step in the third processing step of the second embodiment.
FIG. 8 is a schematic cross-sectional view of the second milling step in the third processing step of the second embodiment.
FIG. 9 is a schematic cross-sectional view of the third milling step in the third processing step of the second embodiment.
The reference numbers are as follows: the pressure shell comprises a 1-pressure shell body, a 101-top cover, a 102-pressure shell main body, a 2-columnar monomer, a 3-elongated hole flow channel, a 4-annular embedded part, a 401-annular base, a 402-shaped sand-lined 180-degree elbow pipeline, a 5-semicircular groove, a 6-strip-shaped groove, a 7-annular reinforcing rib, an 8-plate-shaped hollow part and an alpha-included angle.
Detailed Description
The technical solution of the present invention is clearly and completely described below with reference to the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Implement method
The heat exchanger and pressure shell integrated structure for the stirling device as shown in fig. 1 to 3 comprises a pressure shell body 1, wherein the upper part of the pressure shell body 1 is a hollowed-out heat exchange structure formed by a plurality of groups of columnar parts, the columnar parts are uniformly distributed along the circumferential direction of the pressure shell body 1, each group of columnar parts comprises an inner columnar monomer and an outer columnar monomer 2, elongated hole flow channels 3 are arranged in the columnar monomers 2 along the length direction of the columnar monomers, one ends of the two elongated hole flow channels 3 of each group of columnar monomers 2 are communicated with the top part of the pressure shell body 1, the other ends of the inner elongated hole flow channels 3 are communicated with an expansion cavity formed by the lower part of the pressure shell body 1 and an ejector, and the other ends of the outer elongated hole flow channels 3 are adjacent to the end surface of the regenerator.
In this embodiment the diameter of the elongated bore flow channel 3 is 2-4 mm.
In this embodiment, the pressure shell further comprises an annular embedded part 4, the annular embedded part 4 is arranged at the top in the pressure shell body 1, the annular embedded part 4 comprises an annular base 401 and a 180-degree elbow pipeline 402, a semicircular groove 5 matched with the 180-degree elbow pipeline 402 for use is uniformly arranged on one side of the annular base 401 along the circumference, the 180-degree elbow pipeline 402 is clamped in the semicircular groove 5, and two ends of the 180-degree elbow pipeline 402 are communicated with the two elongated hole runners 3 in the same group of cylindrical monomers 2.
In the embodiment, the melting point of the annular embedded part 4 is higher than that of the pressure shell body 1.
The specific processing steps of the heat exchanger and pressure shell integrated structure are as follows:
step one, turning, milling and composite processing are carried out, and an annular base 401 of an annular embedded part 4 is prepared;
assembling 180-degree elbow pipelines 402, and sequentially and uniformly clamping the 180-degree elbow pipelines 402 in the semicircular grooves 5 of the annular embedded parts 4;
and step three, assembling the annular embedded part 4 and the pressure shell body pouring mold in the step two, occupying the hollow part in the middle and the elongated hole flow channel 3 by using a ceramic core, and pouring and forming at one time to complete the processing of the heat exchanger and pressure shell integrated structure.
The embodiment is used as the volume production model of heat exchanger and pressure shell integral type structure, combines together this innovative design through built-in fitting and fretwork heat transfer structure, has realized the integration casting of heat exchanger and pressure shell, need not the welding, and the gas tightness is excellent, can effectively improve stirling device's life, reduces manufacturing cost, has high using value.
Example two
As shown in fig. 4 to 6, the difference between the present embodiment and the first embodiment is that the pressure shell body 1 includes a top cover 101 and a pressure shell main body 102, the top cover 101 is welded on the top of the pressure shell main body 102, the columnar portion is located on the pressure shell main body 102, one side of the top cover 101 opposite to the pressure shell main body 102 is uniformly provided with strip-shaped grooves 6 along the circumference, and a duct defined by the strip-shaped grooves 6 and the pressure shell main body 102 is used for communicating two elongated runners 3 in each group of columnar single bodies 2.
In this embodiment, the middle of the cylindrical portion is provided with an annular bead 7 parallel to the top cover.
In the present embodiment, the columnar monomer 2 is an irregular pentagon.
As shown in fig. 7 to 9, the specific processing steps of the heat exchanger and pressure shell integrated structure are as follows:
turning to manufacture the shape of the pressure shell main body 102;
step two, processing elongated hole runners in the columnar single body by adopting a deep and long hole machine tool;
milling to manufacture the columnar monomer 2, wherein the specific milling step comprises the first step of cutting a cutter along the radial direction of the pressure shell main body 102 to mill a gap between two adjacent groups of columnar parts to mill the plate-shaped hollow parts 8, the second step of cutting the cutter obliquely along the outer circumference of the pressure shell main body 102 in parallel to the cross section of the pressure shell main body 102 to penetrate through the two adjacent groups of plate-shaped hollow parts 8, and the third step of cutting the cutter symmetrically in sequence relative to the second step to form the irregular pentagonal columnar monomer 2;
step four, turning and milling composite processing is carried out, and the top cover 101 is manufactured;
and step five, welding the top cover 101 and the pressure shell main body 102, namely finishing the processing of the heat exchanger and pressure shell integrated structure.
In the third step, the included angle between the milling lower cutters in the second step and the third step and the milling lower cutter in the first step is 25-35 degrees.
The heat exchanger and the pressure shell integrated structure manufactured by the scheme of the embodiment has the advantages of short processing period and easy parameter adjustment, and is suitable for the development process of a prototype and small-batch production. Because of the casting needs the die sinking, the trial-manufacturing cycle is long, changes the mould, repaiies the mould with high costs, in order to reduce development cost and the bad potential risk of parameter earlier stage, can utilize this embodiment to develop earlier and match, optimize pressure shell body and fretwork heat transfer structure's structural parameter, provide data support for the structural style of casting mode processing, after guaranteeing that heat exchanger and pressure shell integral type structural style can reach practical application requirement, adopt the casting type to carry out the volume production. In this embodiment, the top cover 101 and the pressure shell main body 102 need to be welded, and the welding seam is two circular welding seams on the inner circumference and the outer circumference, so that compared with the welding process of the traditional tube bundle heat exchanger, the welding spot is few, the working space of a welding gun is wide, the leak detection is easy to implement, and the process quality is easy to guarantee.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A heat exchanger and pressure shell integral type structure for stirling device which characterized in that: including the pressure shell body, pressure shell body upper portion is the fretwork heat transfer structure who is formed by multiunit column portion, column portion is along pressure shell body circumference evenly distributed, and every group column portion includes two inside and outside column monomers, be equipped with the elongated hole runner along its length direction in the column monomer, the one end of two elongated hole runners of every group column monomer is at this internal top intercommunication of pressure shell, and wherein the other end of interior week elongated hole runner communicates with the expansion chamber that pressure shell body lower part and ejector enclose, and the other end of periphery elongated hole runner borders on the terminal surface of regenerator.
2. The integrated structure of the heat exchanger and the pressure shell as recited in claim 1, wherein: the diameter of the elongated hole flow passage is 2-4 mm.
3. The integrated structure of the heat exchanger and the pressure shell as recited in claim 1, wherein: the novel pressure shell is characterized by further comprising an annular embedded part, wherein the annular embedded part is arranged at the top of the pressure shell body and comprises an annular base and a 180-degree elbow pipeline, a semicircular groove matched with the 180-degree elbow pipeline is uniformly formed in one side of the annular base along the circumference, the 180-degree elbow pipeline is clamped in the semicircular groove, and two ends of the 180-degree elbow pipeline are communicated with two elongated hole flow passages in the same group of columnar units.
4. The integrated structure of the heat exchanger and the pressure shell as recited in claim 3, wherein: the melting point of the annular embedded part is higher than that of the pressure shell body.
5. The integrated structure of the heat exchanger and the pressure shell as recited in claim 1, wherein: the pressure shell body includes top cap, pressure shell main part, the top cap welding is at pressure shell main part top, the column position is in the pressure shell main part, the top cap is just evenly being equipped with the bar groove along the circumference to one side of pressure shell main part, the pore that the bar groove and pressure shell main part enclose is used for communicateing two elongated hole runners in every group column monomer.
6. The integrated structure of the heat exchanger and the pressure shell as recited in claim 5, wherein: the middle part of the columnar part is parallel to the top cover and is provided with an annular reinforcing rib.
7. The integrated structure of the heat exchanger and the pressure shell as recited in claim 5, wherein: the columnar monomer is irregular pentagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121020612.9U CN214746592U (en) | 2021-05-13 | 2021-05-13 | Heat exchanger and pressure shell integrated structure for Stirling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121020612.9U CN214746592U (en) | 2021-05-13 | 2021-05-13 | Heat exchanger and pressure shell integrated structure for Stirling device |
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| Publication Number | Publication Date |
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| CN214746592U true CN214746592U (en) | 2021-11-16 |
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| CN202121020612.9U Active CN214746592U (en) | 2021-05-13 | 2021-05-13 | Heat exchanger and pressure shell integrated structure for Stirling device |
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- 2021-05-13 CN CN202121020612.9U patent/CN214746592U/en active Active
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