CN110550241B - Non-uniform internal angle structural liquid reservoir - Google Patents
Non-uniform internal angle structural liquid reservoir Download PDFInfo
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- CN110550241B CN110550241B CN201910672826.5A CN201910672826A CN110550241B CN 110550241 B CN110550241 B CN 110550241B CN 201910672826 A CN201910672826 A CN 201910672826A CN 110550241 B CN110550241 B CN 110550241B
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- liquid storage
- storage chamber
- angle structure
- auxiliary liquid
- uniform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/46—Arrangements or adaptations of devices for control of environment or living conditions
- B64G1/50—Arrangements or adaptations of devices for control of environment or living conditions for temperature control
- B64G1/506—Heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/043—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure forming loops, e.g. capillary pumped loops
Abstract
The invention discloses a non-uniform internal angle structural liquid reservoir, which comprises: the liquid pipeline, the main liquid storage chamber, the auxiliary liquid storage chamber, the first-stage inner angle structure, the micro-groove structure and the second-stage inner angle structure; the main liquid storage chamber and the auxiliary liquid storage chamber are coaxial through chambers with unequal cross sections; the liquid pipeline passes through the main liquid storage chamber to reach the farthest end of the auxiliary liquid storage chamber; the first-stage inner angle structure is arranged in the main liquid storage chamber, and the second-stage inner angle structure is arranged in the auxiliary liquid storage chamber; wherein, the first-stage inner angle structure is coaxial with the second-stage inner angle structure and is connected with the front end of the inlet of the auxiliary liquid storage chamber; the micro-groove structure is arranged along the inner wall surface of the main liquid storage chamber and extends to the inlet of the auxiliary liquid storage chamber to be communicated with the auxiliary liquid storage chamber. The invention has simple structure, small flow resistance and directional and rapid steam exhaust capacity, and ensures that the fluid working medium is filled in the auxiliary liquid storage chamber by the capillary driving force provided by the inner angle structure even under the condition of antigravity, thereby ensuring the safe operation of the loop heat pipe under the condition of variable gravity.
Description
Technical Field
The invention belongs to the technical field of thermal control of spacecrafts, and particularly relates to a liquid reservoir with a non-uniform internal angle structure.
Background
The liquid accumulator is an important component of the loop heat pipe, is connected with the evaporator into a whole, collects the condensed liquid working medium and continuously supplies the liquid working medium for the capillary core in the evaporator. The surface of the porous structure capillary core, which is in contact with a heat source, is used as an evaporation surface, and a meniscus is formed between the two-phase interface in the capillary small hole to provide a capillary driving force for driving the working medium to circulate. In order to ensure the normal operation of the liquid storage device, continuous internal angles or capillary structures are required in the liquid storage device so as to realize continuous circulation and uninterrupted supply of the working medium. This requires, on the one hand, a sufficient capillary driving force of the capillary structure in the reservoir and, on the other hand, a flow resistance which is as low as possible. In addition, the operation of a loop heat pipe in a spacecraft is often subjected to changes of the size and the direction of a gravity field, and the designed internal structure of the liquid storage device has the capability of controlling fluid under the condition of variable gravity, so that the conditions of no failure of antigravity and the like are met.
To meet the above requirements, some internal structures need to be designed in the reservoir, and the addition of capillary porous media is a common method at present, however, the type and size of the porous media are determined by the capillary driving force provided by the porous media and the corresponding resistance relationship: too large a capillary pore size can not meet the requirement of continuous supply of fluid, and too small a pore size can bring too large flow resistance and can not meet the requirements of fluid conveying rate and flow. Meanwhile, the arrangement form of the porous medium capillary structure does not have a unified standard at present, and the liquid supply channel and the gas exhaust channel are realized only by different arrangement spaces. How to reduce the flow resistance and achieve directional venting remains one of the major challenges in current reservoir designs.
Disclosure of Invention
The technical problem of the invention is solved: the defects of the prior art are overcome, the non-uniform internal angle structure type liquid reservoir is provided, the internal angle structure is arranged in the liquid reservoir as a main means for enhancing capillary driving force, compared with a porous medium structure, the internal angle structure can realize directional transportation of fluid, and smaller flow resistance exists.
In order to solve the technical problem, the invention discloses a non-uniform internal angle structural liquid reservoir, which comprises: the liquid pipeline, the main liquid storage chamber, the auxiliary liquid storage chamber, the first-stage inner angle structure, the micro-groove structure and the second-stage inner angle structure;
the main liquid storage chamber and the auxiliary liquid storage chamber are coaxial through chambers with unequal cross sections;
the liquid pipeline passes through the main liquid storage chamber to reach the farthest end of the auxiliary liquid storage chamber;
the first-stage inner angle structure is arranged in the main liquid storage chamber, and the second-stage inner angle structure is arranged in the auxiliary liquid storage chamber; wherein, the first-stage inner angle structure is coaxial with the second-stage inner angle structure and is connected with the front end of the inlet of the auxiliary liquid storage chamber;
the micro-groove structure is arranged along the inner wall surface of the main liquid storage chamber and extends to the inlet of the auxiliary liquid storage chamber to be communicated with the auxiliary liquid storage chamber.
In the above-described non-uniform interior angle reservoir,
the first-level inner angle structure is as follows: the N metal flat plates are welded on the outer wall surface of the liquid pipeline to form a uniform inner angle structure;
the secondary internal angle structure is: the non-uniform included angle structure is formed by welding N variable cross-section metal flat plates on the outer wall surface of the liquid pipeline; wherein, the included angle of the non-uniform included angle structure is continuously reduced along the depth direction of the liquid pipeline.
In the above-described non-uniform interior angle reservoir,
the range of the unilateral gradient gamma of the non-uniform included angle structure meets the following requirements:
in the above-described non-uniform interior angle reservoir,
the value range of N satisfies: n is more than 4 and less than 16.
In the above-described non-uniform interior angle reservoir,
the metal flat plates and the variable cross-section metal flat plates are uniformly arranged around the liquid pipeline respectively, and equal included angle angles are formed along the circumferential direction.
In the above-described non-uniform interior angle reservoir,
height H of first-level inner angle structure1And height H of secondary inner angle structure2Respectively satisfy:
wherein R is1Denotes the radius of the main reservoir, R2Indicating the radius of the sub-reservoir.
In the above-described non-uniform interior angle reservoir,
the micro-groove structure is formed by arranging M parallel metal strips along the circumferential direction of the inner wall surface of the main liquid storage chamber.
In the above non-uniform internal angle type reservoir, further comprising: a capillary core, an evaporation chamber and a steam pipeline;
the capillary core is arranged outside the auxiliary liquid storage chamber and serves as the outer wall surface of the auxiliary liquid storage chamber;
the evaporation chamber is positioned outside the auxiliary liquid storage chamber and is connected with the auxiliary liquid storage chamber through a capillary core;
the steam pipe is led out from any side surface of the evaporation chamber.
The invention has the following advantages:
(1) the non-uniform internal angle structure type liquid reservoir has the advantages that the internal angle structure is arranged inside the non-uniform internal angle structure type liquid reservoir, the capillary driving force is enhanced, the internal angle structure can realize directional transportation of fluid and lower flow resistance exists compared with a porous medium structure.
(2) In the invention, aiming at different fluid working media, the required capillary driving force can be adjusted by adjusting parameters (such as the number of metal flat plates and variable-section metal flat plates, the height of the inner angle structure, the included angle gradient and the like) of the first-stage inner angle structure and the second-stage inner angle structure, so that the state that the auxiliary liquid storage chamber can be completely filled with the fluid working media is achieved. Because the inner angle structure is consistent with the transportation direction of the body working medium, the flow resistance is small, and factors such as osmotic pressure brought by porous media do not exist.
(3) In the invention, under the action of capillary force provided by the inner angle structure, the fluid working medium is filled in the auxiliary liquid storage chamber, the capillary force can exceed the gravity of the fluid working medium, and the inner angle structure has better packaging effect on the shaking of the fluid working medium, so that even under the condition of counter gravity, the condition that the fluid working medium is filled in the auxiliary liquid storage chamber and the interface is not invalid is still realized, and the safe operation of the loop heat pipe under the condition of large variable gravity is ensured.
(4) Compare with traditional porous medium structure, the interior angle structure is along the flow direction setting on the one hand, on the other hand interior angle structure has certain slope to change, become little to vice stock solution room degree of depth direction interior angle contained angle promptly, the capillary force that provides increases gradually, at this moment, if there is steam to penetrate behind the capillary core entering vice stock solution room, inhomogeneous interior angle structure can be smoothly with the gas-liquid along the direction that the interior angle becomes big (promptly to main stock solution room) discharge, later at the indoor condensation of main stock solution, directional quick carminative requirement has been satisfied, the ability that the reservoir fluid transported and two-phase interface distribution control has been improved.
(5) The liquid storage device with the non-uniform inner angle structure has the advantages of simple structure and low manufacturing cost, and the related inner angle structure can be made of the same material as the liquid storage device and is formed by processing different inner angle plates and welding the inner angle plates to the inner walls of a liquid pipeline and the liquid storage device.
Drawings
FIG. 1 is a schematic diagram of a non-uniform interior angle reservoir according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
fig. 4 is a schematic structural diagram of a non-uniform included angle structure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 3, in the present embodiment, the non-uniform interior angle type liquid reservoir includes: liquid pipeline 1, main stock solution room 2, vice stock solution room 3, one-level interior angle structure 4, microgroove structure 5 and second grade interior angle structure 6. Wherein, the main liquid storage chamber 2 and the auxiliary liquid storage chamber 3 are coaxial through chambers with unequal cross sections; the liquid pipeline 1 passes through the main liquid storage chamber 2 to reach the farthest end of the auxiliary liquid storage chamber 3; the first-stage inner angle structure 4 is arranged in the main liquid storage chamber 2, and the second-stage inner angle structure 6 is arranged in the auxiliary liquid storage chamber 3; wherein, the first-stage inner angle structure 4 is coaxial with the second-stage inner angle structure 6 and is connected with the front end of the inlet of the auxiliary liquid storage chamber 3; the micro-groove structure 5 is arranged along the inner wall surface of the main liquid storage chamber 2 and extends to the inlet of the auxiliary liquid storage chamber 3 to be communicated with the auxiliary liquid storage chamber 3. It is thus clear that based on the inhomogeneous interior angle structure reservoir of this embodiment, fluid working medium can directly supply to reach the innermost of vice stock solution room after flowing out from the port of liquid pipeline, and the one-level interior angle structure and the second grade interior angle structure of setting in main stock solution room and vice stock solution room have increased fluid working medium's transport ability.
In a preferred embodiment of the present invention, the first-stage inner corner structure 4 may be: n metal flat plates are welded on the outer wall surface of the liquid pipeline 1 to form a uniform inner angle structure. The secondary interior angle structure 6 may be: the non-uniform included angle structure formed by welding N variable cross-section metal flat plates on the outer wall surface of the liquid pipeline 1. Wherein, each metal flat plate and each variable cross section metal flat plate all encircle liquid pipeline 1 and evenly arrange, form equal contained angle along circumference. The number of the metal flat plates is consistent with that of the variable cross-section metal flat plates, so that the fluid working medium can be conveniently transported.
Preferably, the value range of N satisfies: n is more than 4 and less than 16. Of course, the specific value of N may be determined according to the physical properties of the fluid working medium contained in the reservoir in the actual application process, which is not limited in this embodiment.
Preferably, the height H of the first inner corner structure 41And the height H of the secondary inner corner structure 62The following relationships are satisfied:
wherein R is1Denotes the radius of the main reservoir 2, R2Showing the radius of the sub-reservoir 3.
Preferably, as shown in fig. 4, the included angle of the non-uniform included angle structure is continuously reduced along the depth direction of the liquid pipeline 1. Wherein, the range of the single-side slope γ of the non-uniform included angle 10 can satisfy:
in a preferred embodiment of the present invention, as shown in fig. 2, the micro-groove structure 5 may be formed by M parallel metal strips arranged along the circumferential direction of the inner wall surface of the main liquid storage chamber 2. The value of M may be determined according to actual conditions, and this embodiment is not limited thereto.
In a preferred embodiment of the present invention, the non-uniform interior angle reservoir may further include: a capillary wick 7, an evaporation chamber 8 and a vapour line 9. Wherein, the capillary core 7 is arranged outside the auxiliary liquid storage chamber 3 and is used as the outer wall surface of the auxiliary liquid storage chamber 3; the evaporation chamber 8 is positioned outside the auxiliary liquid storage chamber 3 and is connected with the auxiliary liquid storage chamber 3 through a capillary wick 7; a steam line 9 leads from either side of the evaporation chamber 8.
The capillary core 7 is used as the outer wall surface of the auxiliary liquid storage chamber 3, and also used as an evaporation interface of fluid working medium in the auxiliary liquid storage chamber 3, and prevents steam in the evaporation chamber 8 from flowing back into the auxiliary liquid storage chamber 3.
On the basis of the above embodiments, the following description will be made in conjunction with the working principle of the non-uniform internal angle type reservoir.
The working principle of the non-uniform internal angle structural type liquid reservoir is as follows:
after the loop heat pipe is started, a certain volume of fluid working medium is arranged in the non-uniform internal angle structural liquid reservoir, and the fluid working medium forms a special distribution form in the non-uniform internal angle structural liquid reservoir under the action of the first-stage internal angle structure and the second-stage internal angle structure. Specifically, the method comprises the following steps:
in the main stock solution room, fluid working medium can flow to vice stock solution room one end along the contained angle that one-level interior angle structure formed, and simultaneously, the microgroove structure of setting on the internal face of main stock solution room provides certain capillary force, makes fluid working medium along the wall diffusion, leads to the entrance of vice stock solution room always.
In the auxiliary liquid storage chamber, on one hand, a non-uniform included angle along the flow direction is formed by the secondary internal angle structure, and the capillary force which can be provided is gradually increased along the flow direction (the depth direction of the auxiliary liquid storage chamber); on the other hand, the height of the secondary inner angle structure satisfies
The microchannel is formed in the same manner as the wall surface of the sub-reservoir.
It can be seen that the interior corner structures and microchannels provide a strong capillary driving force for the fluid working medium. In the depth direction of vice stock solution room, because capillary force constantly increases, can constantly inhale the fluid working medium that main stock solution room transported and come to be full of vice stock solution room completely.
Furthermore, the non-uniform internal angle liquid storage device comprises an evaporation chamber, the evaporation chamber has a heat absorption function, the fluid working medium is continuously evaporated into steam in the capillary core, the fluid working medium is continuously supplied from the secondary liquid storage chamber by the capillary core, and the steam is collected in the evaporation chamber and continuously discharged through a steam pipeline. Conversely, the condensed fluid working medium can reenter the non-uniform internal angle structural liquid reservoir through the liquid pipeline, and the outlet of the liquid pipeline is introduced into the bottom end of the auxiliary liquid reservoir, so that the capillary core and the auxiliary liquid reservoir are ensured to be supplied with the fluid working medium sufficiently.
In addition, because the first-stage inner angle structure and the second-stage inner angle structure are coaxially arranged and are connected at the connecting part of the main liquid storage chamber and the auxiliary liquid storage chamber, the width and the included angle are equal, and the heights are different, so that the fluid working medium in the main liquid storage chamber can smoothly enter the auxiliary liquid storage chamber, and the fluid working medium has the minimum flow resistance in the required flow direction. If the instant evaporation amount is too large and vapor bubbles in the capillary core penetrate into the auxiliary liquid storage chamber, the non-uniform included angle structure is beneficial to quickly discharging the vapor bubbles to the main liquid storage chamber and condensing the vapor bubbles into liquid in the main liquid storage chamber.
Despite the internal angle structure, the main liquid storage chamber and the auxiliary liquid storage chamber are communicated in the circumferential direction, and the supply of fluid working media under extreme conditions is ensured. Therefore, even under the condition of antigravity, the capillary force can also ensure the climbing height of the fluid working medium along the inner angle structure and the micro-channel, the fluid working medium is full of the auxiliary liquid storage chamber, and the safe operation of the loop heat pipe under the condition of changing the gravity and the direction is ensured.
In conclusion, the non-uniform internal angle structure type liquid storage device has the advantages of simple structure, small flow resistance and directional and rapid steam exhaust capacity, and the capillary driving force provided by the internal angle structure can enable the fluid working medium to fill the space of the auxiliary liquid storage chamber even under the condition of antigravity, so that the safe operation of the loop heat pipe under the condition of variable gravity is ensured.
The embodiments in the present description are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only for the best mode 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.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (6)
1. A non-uniform interior angle reservoir, comprising: the liquid storage device comprises a liquid pipeline (1), a main liquid storage chamber (2), an auxiliary liquid storage chamber (3), a first-stage inner angle structure (4), a micro-groove structure (5) and a second-stage inner angle structure (6);
the main liquid storage chamber (2) and the auxiliary liquid storage chamber (3) are coaxial through chambers with unequal cross sections;
the liquid pipeline (1) passes through the main liquid storage chamber (2) to reach the farthest end of the auxiliary liquid storage chamber (3);
the first-stage inner angle structure (4) is arranged in the main liquid storage chamber (2), and the second-stage inner angle structure (6) is arranged in the auxiliary liquid storage chamber (3); wherein, the first-stage inner angle structure (4) is coaxial with the second-stage inner angle structure (6) and is connected with the front end of the inlet of the auxiliary liquid storage chamber (3);
the microgroove structure (5) is arranged along the inner wall surface of the main liquid storage chamber (2) and extends to the inlet of the auxiliary liquid storage chamber (3) to be communicated with the auxiliary liquid storage chamber (3);
the first-level inner angle structure (4) is as follows: n metal flat plates are welded on the outer wall surface of the liquid pipeline (1) to form a uniform included angle structure;
the secondary internal angle structure (6) is as follows: the non-uniform included angle structure is formed by welding N variable cross-section metal flat plates on the outer wall surface of the liquid pipeline (1); the included angle of the non-uniform included angle structure is continuously reduced along the depth direction of the liquid pipeline (1); the range of the single-side gradient gamma of the non-uniform included angle (10) of the non-uniform included angle structure meets the following requirements:
2. the non-uniform interior angle fluid reservoir of claim 1,
the value range of N satisfies: n is more than 4 and less than 16.
3. The non-uniform interior angle fluid reservoir of claim 1,
the metal flat plates and the variable cross-section metal flat plates are uniformly arranged around the liquid pipeline (1) respectively, and equal included angle angles are formed along the circumferential direction.
4. The non-uniform interior angle fluid reservoir of claim 1,
height H of first-level inner angle structure (4)1And the height H of the secondary inner angle structure (6)2Respectively satisfy:
wherein R is1Denotes the radius of the main reservoir (2), R2Represents the radius of the sub-reservoir (3).
5. The non-uniform interior angle fluid reservoir of claim 1,
the micro-groove structure (5) is formed by arranging M parallel metal strips along the circumferential direction of the inner wall surface of the main liquid storage chamber (2).
6. The non-uniform interior angle fluid reservoir of any one of claim 1, further comprising: the capillary core (7), the evaporation chamber (8) and the steam pipeline (9);
the capillary core (7) is arranged on the outer side of the auxiliary liquid storage chamber (3) and serves as the outer wall surface of the auxiliary liquid storage chamber (3);
the evaporation chamber (8) is positioned at the outer side of the auxiliary liquid storage chamber (3) and is connected with the auxiliary liquid storage chamber (3) through a capillary core (7);
the steam pipeline (9) is led out from any side surface of the evaporation chamber (8).
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| CN201910672826.5A CN110550241B (en) | 2019-07-24 | 2019-07-24 | Non-uniform internal angle structural liquid reservoir |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910672826.5A CN110550241B (en) | 2019-07-24 | 2019-07-24 | Non-uniform internal angle structural liquid reservoir |
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| CN110550241A CN110550241A (en) | 2019-12-10 |
| CN110550241B true CN110550241B (en) | 2021-06-11 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130976A1 (en) * | 1991-09-18 | 1993-03-25 | Sippel Rudolf | Heat pipe for use in space craft/satellites - consists of internal aluminium@ profile and outer jacket of fibre reinforced material |
| CN101943532A (en) * | 2009-07-03 | 2011-01-12 | 富准精密工业(深圳)有限公司 | Loop heat pipe |
| CN202216596U (en) * | 2011-06-22 | 2012-05-09 | 北京市太阳能研究所有限公司 | Heat pipe |
| CN103482086B (en) * | 2013-08-12 | 2015-11-18 | 上海卫星工程研究所 | High adaptation loop circuit heat pipe temperature regulating device |
| CN104613802B (en) * | 2015-03-03 | 2017-11-21 | 湖南中科热控技术有限公司 | The evaporator and heat abstractor of a kind of loop circuit heat pipe |
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