CN212673923U

CN212673923U - Pulsation loop heat pipe for heat dissipation of aircraft engine

Info

Publication number: CN212673923U
Application number: CN202021236025.9U
Authority: CN
Inventors: 耿雪
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-03-09
Anticipated expiration: 2030-06-29

Abstract

The utility model provides an aeroengine pulsation loop heat pipe for heat dissipation, it includes condenser, evaporimeter, reservoir, vapour pipeline and two liquid pipelines, the import of condenser with pass through between the export of evaporimeter the vapour pipe connection, the export of condenser with pass through between the import of reservoir the liquid pipe connection, the export of reservoir with pass through between the import of evaporimeter liquid pipe connection, each set up a check valve on the liquid pipeline, just evaporimeter and reservoir are located the top of condenser forms the pulsation loop. The utility model discloses a system scale is little, the operation principle is simple reliable, working property is stable to certain antigravity ability has. The pulsating loop heat pipe can realize heat collection of a centralized heating device, transmits heat to a position where ventilation and heat dissipation can be facilitated through a fluid pipeline and discharges the heat, so that the heat dissipation problem of the device is solved, and a heat dissipation channel is convenient to flexibly arrange.

Description

Pulsation loop heat pipe for heat dissipation of aircraft engine

Technical Field

The utility model relates to an aeroengine thermal control technical field, in particular to pulsation loop heat pipe is used in aeroengine heat dissipation.

Background

In the field of aircraft engines, with the technical development of aircraft engines, the operating temperature of the engines is higher and higher, and due to the fact that the integration level is continuously improved, various heating devices in a nacelle are used in a large quantity, the temperature environment in the nacelle of the aircraft engine is deteriorated in a flying or ground running state, and an effective ventilation cooling mode needs to be adopted to prevent overheating of engine components and the ambient temperature in the nacelle.

Ventilation cooling systems and nacelle cooling systems are commonly used to dissipate heat. The design of the ventilation cooling system needs to meet the cooling requirement of heat flow concentration components, and the design itself requires that the structure is as simple as possible, the reliability is high, and the weight is low. The nacelle cooling system typically includes a core nacelle cooling system and a fan nacelle cooling system that are system cooled by the introduction of fan outlet air and nacelle outside air, respectively.

In addition to system cooling, dedicated cooling lines or cooling systems are also arranged to dissipate heat from the vital electronic equipment in the cabin, such as electronic controllers (EECs), ignition activation boxes, ignition leads, transient bleed valves (SBVs), start bleed valves (TBVs), Low Pressure Turbine Active Clearance Controls (LPTACCs), High Pressure Turbine Active Clearance Controls (HPTACCs), and Environmental Control System (ECS) valves.

Among these, EEC is an important control electronics for the engine, which generates a concentrated and large amount of heat during operation. Under the ground operation and the flight state with smaller flight Mach number, the ventilation volume of the fan cabin is not enough to meet the cooling requirement of the EEC, and a special blower and a pipeline device thereof are generally additionally arranged to ensure the cooling requirement of the EEC. The presence of the EEC-dedicated blower and its piping will to some extent lead to increased nacelle weight and reduced reliability.

The Loop Heat Pipe (LHP) is developed by a Heat Pipe technology, mainly comprises an evaporator, a condenser and a liquid storage device, is a two-phase fluid Loop, and realizes Heat conduction through the evaporation and condensation process of a working medium. The evaporator adopts a capillary core to generate capillary force to drive the working medium of the system to operate, thereby realizing heat conduction in a small temperature difference and long-distance state. The high-efficiency heat conduction mode can conduct the heat generated in a concentrated mode to an area where a large amount of cooling fluid passes, and high-efficiency heat dissipation is achieved. Loop heat pipe technology has begun to find widespread use in the field of spacecraft thermal control and electronics heat dissipation today.

However, the conventional loop heat pipe technology has a problem of difficult starting under a large input power, and an important reason is that the system can be operated smoothly by using capillary force to generate driving, and the capillary force is inversely proportional to the pore diameter of the capillary wick and is greatly influenced by the design and manufacturing capacity of the capillary wick.

In view of the above, those skilled in the art have developed a pulsating loop heat pipe for heat dissipation of an aircraft engine to overcome the above technical problems

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to have the starting difficulty under big input power in order to overcome among the prior art loop heat pipe technique, defects such as the unable high-efficient nimble heat extraction of aeroengine's concentrated equipment of generating heat provide an aeroengine pulsation loop heat pipe for the heat dissipation.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the utility model provides an aeroengine is pulsation loop heat pipe for heat dissipation, its characterized in that, pulsation loop heat pipe includes condenser, evaporimeter, reservoir, vapour pipeline and two liquid pipelines, the import of condenser with pass through between the export of evaporimeter vapour pipe connection, the export of condenser with pass through between the import of reservoir liquid pipe connection, the export of reservoir with pass through between the import of evaporimeter liquid pipe connection, each set up a check valve on the liquid pipeline, just evaporimeter and reservoir are located the top of condenser forms the pulsation loop.

According to the utility model discloses an embodiment, the evaporimeter includes evaporimeter body, first import pipe and first outlet pipe, first import pipe with first outlet pipe is connected respectively in the import department and the exit of evaporimeter, the evaporimeter body is connected with heat source heat conduction.

According to an embodiment of the present invention, the evaporator is in a square shape or a rectangular parallelepiped shape.

According to an embodiment of the present invention, the condenser includes a coil pipe, a second inlet pipe and a second outlet pipe, the second inlet pipe and the second outlet pipe are connected respectively at an inlet and an outlet of the coil pipe.

According to an embodiment of the present invention, the condenser takes the shape of a serpentine coil.

According to the utility model discloses an embodiment, the reservoir includes a jar body, third import pipe, third outlet pipe and fills the mouth, the third import pipe with the third outlet pipe is connected respectively the import department and the exit of the jar body, it sets up to fill the mouth jar physically, liquid working medium is followed third import pipe flows in behind the jar body, store and get up via again the third outlet pipe flows.

According to an embodiment of the present invention, the reservoir is in the shape of a cylinder.

According to an embodiment of the invention, the check valve is a one-way valve.

According to the utility model discloses an embodiment, the check valve includes valve body, fourth import pipe and fourth outlet pipe, the fourth import pipe with the fourth outlet pipe is connected respectively in the import department and the exit of valve body.

According to an embodiment of the present invention, the two-phase flow heat exchange working medium adopted in the pulsation loop heat pipe is ethanol or acetone.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses pulsation loop heat pipe for aircraft engine heat dissipation has following a great deal of advantage:

the system has small scale, simple and reliable operation principle, stable working performance and certain antigravity capability. The pulsating loop heat pipe can realize heat collection of a centralized heating device, transmits heat to a position where ventilation and heat dissipation can be facilitated through a fluid pipeline and discharges the heat, so that the heat dissipation problem of the device is solved, and a heat dissipation channel is convenient to flexibly arrange.

The pulsating loop heat pipe transmits heat by utilizing latent heat of vaporization of the two-phase flow working medium, has higher heat dissipation capacity under small flow and has compact structure.

And thirdly, the pulsating loop heat pipe drives the working medium to flow by utilizing pressure pulsation generated by evaporation and cooling of the two-phase flow working medium, the operation principle is simple and reliable, the working performance is stable, and the pulsating loop heat pipe has certain antigravity capability.

And fourthly, the evaporator, the condenser and the structure can be flexibly designed according to actual conditions, and the heat dissipation system has stronger adaptability.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout,

wherein:

fig. 1 is a schematic diagram of the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention.

Fig. 2 is the structural schematic diagram of the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention.

Fig. 3 is a schematic structural diagram of the evaporator in the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention.

Fig. 4 is a schematic structural diagram of a condenser in the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention.

Fig. 5 is the structural schematic diagram of the reservoir in the pulsating loop heat pipe for aircraft engine heat dissipation of the present invention.

FIG. 6 is a schematic structural view of the pulsating loop heat pipe check valve for heat dissipation of an aircraft engine according to the present invention.

[ reference numerals ]

Condenser 10

Evaporator 20

Reservoir 30

Steam line 40

Liquid line 50

Check valve 60

Evaporator body 21

First inlet pipe 22

First outlet pipe 23

Coil pipe 11

Second inlet pipe 12

Second outlet pipe 13

Can body 31

Third inlet duct 32

Third outlet pipe 33

Filling opening 34

Valve body 61

The fourth intake manifold 62

Fourth outlet pipe 63

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 1 is a schematic diagram of the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention. Fig. 2 is the structural schematic diagram of the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention. Fig. 3 is a schematic structural diagram of the evaporator in the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention. Fig. 4 is a schematic structural diagram of a condenser in the pulsating loop heat pipe for heat dissipation of the aero-engine of the present invention. Fig. 5 is the structural schematic diagram of the reservoir in the pulsating loop heat pipe for aircraft engine heat dissipation of the present invention. FIG. 6 is a schematic structural view of the pulsating loop heat pipe check valve for heat dissipation of an aircraft engine according to the present invention.

As shown in fig. 1 to 6, the utility model discloses a pulsation loop heat pipe for aircraft engine heat dissipation, it includes condenser 10, evaporimeter 20, reservoir 30, steam pipeline 40 and two liquid pipelines 50, wherein connect through steam pipeline 40 between the import of condenser 10 and the export of evaporimeter 20, connect through liquid pipeline 50 between the export of condenser 10 and the import of reservoir 30, connect through liquid pipeline 50 between the export of reservoir 30 and the import of evaporimeter 20, set up a check valve 60 on each liquid pipeline 50, and evaporimeter 20 and reservoir 30 are located the top of condenser 10, form the pulsation loop.

Preferably, as shown in fig. 3, an evaporator 20 is used to absorb heat and increase pressure. The evaporator 20 may include an evaporator body 21, a first inlet pipe 22 and a first outlet pipe 23, the first inlet pipe 22 and the first outlet pipe 23 are respectively connected to an inlet and an outlet of the evaporator 20, the evaporator body 21 is thermally connected to a heat source, after absorbing heat generated by the heat source, the working medium is vaporized inside, the working medium vapor flows out from the outlet pipe, and the liquid working medium flows in from the inlet pipe. Here, the evaporator 20 preferably takes a square or rectangular parallelepiped shape. Of course, this is merely an example, and the shape of the evaporator 20 may also take other shapes, and is not limited thereto.

Preferably, as shown in fig. 4, the condenser 10 is used to dissipate heat and reduce pressure. The condenser 10 may include a coil 11, a second inlet pipe 12 and a second outlet pipe 13, the second inlet pipe 12 and the second outlet pipe 13 being connected at an inlet and an outlet of the coil 11, respectively. Here, the condenser 10 preferably takes the shape of a serpentine coil. The condenser 10 has a large surface area and a long flow path, and can completely condense the working medium steam into liquid.

Preferably, as shown in fig. 5, the accumulator 30 is a cavity with a certain volume for storing and discharging the liquid working medium, and maintains the pressure relatively constant. The liquid reservoir 30 may comprise a tank 31, a third inlet pipe 32, a third outlet pipe 33 and a filling port 34, wherein the third inlet pipe 32 and the third outlet pipe 33 are connected to an inlet and an outlet of the tank 31, respectively, the filling port 34 is arranged on the tank 31, and the liquid working medium flows into the tank 31 from the third inlet pipe 32, is stored and then flows out through the third outlet pipe 33. The filling opening 34 in the tank 31 can be used for vacuum pumping and filling with a working medium. Here, the reservoir 30 preferably takes the shape of a cylinder.

The present embodiment provides for the use of check valve 60 to control the directional flow of the working fluid. The check valve 60 may preferably be a one-way valve. As shown in fig. 6, the check valve 60 may include a valve body 61, a fourth inlet pipe 62, and a fourth outlet pipe 63, the fourth inlet pipe 62 and the fourth outlet pipe 63 being connected at an inlet and an outlet of the valve body 61, respectively. The valve body 61 is internally provided with a non-return structure, so that the working medium can only flow from the inlet pipe to the outlet pipe and is prevented from flowing reversely.

The check valve 60 between the accumulator 30 and the condenser 10 and the check valve 60 between the accumulator 30 and the evaporator 20 are constituted by one-way valves. Wherein a check valve 60 is provided in the accumulator inlet line between the accumulator 30 and the condenser 10 for ensuring one-way flow of liquid working medium from the condenser to the accumulator. A check valve 60 is provided in the inlet tube of the evaporator between the reservoir 30 and the evaporator 20 to ensure one-way flow of liquid working medium from the reservoir to the evaporator.

In addition, the pulsating loop heat pipe in this embodiment employs a vapor line 40 for conveying the working medium vapor from the evaporator 20 to the condenser 10, and a liquid line 50 for conveying the liquid working medium from the condenser 10 to the liquid reservoir 30. The vapor line 40 and the liquid line 50 may be formed of hollow metal pipes for conveying a working medium, the vapor line connects the evaporator and the condenser, and the liquid line connects the condenser and the liquid reservoir.

The two-phase flow heat exchange working medium adopted in the pulse loop heat pipe is preferably ethanol, the density is 789kg/cm3 (at 20 ℃), the boiling point is 78 ℃ (101 kPa) at normal pressure, the saturated vapor pressure is 5.8kPa (at 20 ℃), and the latent heat of vaporization is 953.2kJ/kg (at 20 ℃). Or, the two-phase flow heat exchange working medium adopted in the pulsating loop heat pipe may also be preferably a low boiling point heat exchange working medium such as acetone, which is only an example here and is not limited thereto.

As shown in fig. 1 and fig. 2, when the pulsating loop heat pipe is used, the evaporator 20 is installed on the heat generating surface of the concentrated heat source, and after absorbing heat, the liquid working medium inside the evaporator 20 vaporizes, and the temperature and the pressure rise. The working medium steam flows into the condenser 10 under the pressure driving, and pushes the liquid working medium stored in the condenser 10 into the liquid storage device 30 for storage.

After the liquid working medium in the evaporator 20 is completely evaporated, the pressure in the evaporator 20 and the condenser 10 is continuously reduced along with the continuous condensation of the working medium vapor in the condenser 10 into liquid. When the pressures of evaporator 20 and condenser 10 are below the reservoir pressure, check valve 60 between evaporator 20 and reservoir 30 opens and liquid working substance in reservoir 30 flows into evaporator 20. Here, the presence of the check valve 60 between the evaporator 20 and the accumulator 30 prevents the liquid in the accumulator 30 from reversely flowing into the condenser 10.

When the evaporator 20 is replenished with a new liquid working medium, the working medium starts to be vaporized for a new round, the temperature and the pressure of the evaporator 20 are increased again, and the working medium in the condenser 10 is pushed again to flow back to the liquid storage device 30. The pulsating loop heat pipe is driven by pressure pulsation, and the evaporator 20 intermittently operates to realize continuous heat dissipation.

According to the structure description, the temperature rises after the evaporator 20 of the pulsating loop heat pipe absorbs heat, the liquid working medium in the evaporator 20 evaporates and expands, and the pressure rises. Because the check valve 60 is arranged between the evaporator 20 and the liquid storage device 30, under the driving of pressure, the working medium steam can only enter the condenser 10 in one direction, and pushes the liquid working medium stored in the condenser 10 to the liquid storage device 30 for storage. After the liquid working medium in the evaporator 20 is evaporated, the working medium shrinks in volume along with the continuous condensation of the working medium steam in the condenser 10 into liquid, so that the pressure in the evaporator 20 is continuously reduced and is lower than the liquid storage device 30.

Because the check valve 60 is arranged between the condenser 10 and the liquid storage device 30, the working medium in the liquid storage device 30 can not flow back to the condenser 10, but enters the evaporator 20 under the driving of pressure difference, and the liquid working medium starts a new evaporation and expansion process in the evaporator 20. Through the periodic pressure pulsation in the evaporator 20, the working medium in the loop heat pipe also periodically flows through the evaporator 20 and the condenser 10, so that the evaporation heat absorption and the condensation heat release are realized.

The structure solves the problems of high-efficiency and flexible heat dissipation and the like of concentrated heating equipment of an aircraft engine, and solves the problems that the starting of a common loop heat pipe is limited in heat dissipation capacity due to the influence of capillary force of a capillary core, the structure of the capillary core is complex, and the manufacturing cost is high.

In view of the above, the pulsating loop heat pipe no longer sets up the capillary core in evaporator 20, utilizes the pulsating work of the pressure difference driving system between reservoir 30 and evaporator 20, condenser 10. After the evaporator 20 absorbs heat, the temperature rises, the liquid working medium in the evaporator 20 evaporates and expands, and the pressure rises. Under the driving of pressure, the working medium steam enters the condenser 10 and pushes the liquid working medium in the condenser 10 to the liquid storage device 30 for storage. After the evaporation of the liquid working medium in the evaporator 20 is finished, the liquid working medium is continuously condensed into liquid in the condenser 10 along with the steam of the working medium, the volume of the working medium is contracted, so that the pressure in the evaporator 20 is continuously reduced and is lower than that of the liquid storage device 30, the liquid working medium in the liquid storage device 30 enters the evaporator 20 under the driving of the pressure difference, and the liquid working medium starts a new evaporation expansion process in the evaporator 20. Through the periodical pressure pulsation in the evaporator 20, the working medium in the heat pipe of the pulsation loop also periodically flows through the evaporator 20 and the condenser 10, so that the evaporation heat absorption and the condensation heat release are realized.

The utility model discloses pulsation loop heat pipe for the aircraft engine heat dissipation provides a simple and reliable and light in weight's heat abstractor, the concentrated cooling demand of EEC has been satisfied, consider simultaneously that the concentrated equipment that generates heat that can be applied to the core cabin according to the circumstances like the heat dissipation of equipment such as ignition excitation box, the wire of igniting, transient State Bleed Valve (SBV), start bleed valve (TBV), low pressure turbine initiative clearance control (LPTACC), high pressure turbine initiative clearance control (HPTACC) and Environmental Control System (ECS) valve, reduce the reliance to core cabin cooling air, the engine efficiency is improved.

To sum up, the utility model discloses pulsation loop heat pipe for aircraft engine heat dissipation has following a great deal of advantage:

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.

Claims

1. The utility model provides an aeroengine is pulsation loop heat pipe for heat dissipation, its characterized in that, pulsation loop heat pipe includes condenser, evaporimeter, reservoir, vapour pipeline and two liquid pipelines, the import of condenser with pass through between the export of evaporimeter vapour pipe connection, the export of condenser with pass through between the import of reservoir liquid pipe connection, the export of reservoir with pass through between the import of evaporimeter liquid pipe connection, each set up a check valve on the liquid pipeline, just evaporimeter and reservoir are located the top of condenser forms the pulsation loop.

2. The pulsating loop heat pipe for dissipating heat from an aircraft engine as recited in claim 1, wherein said evaporator comprises an evaporator body, a first inlet pipe and a first outlet pipe, said first inlet pipe and said first outlet pipe being coupled to an inlet and an outlet of said evaporator, respectively, said evaporator body being in thermally conductive communication with a heat source.

3. A pulsating loop heat pipe for dissipating heat from an aircraft engine as defined in claim 2, wherein said evaporator has a rectangular parallelepiped shape.

4. The pulsating loop heat pipe for dissipating heat from an aircraft engine as recited in claim 1, wherein said condenser comprises a coil, a second inlet pipe and a second outlet pipe, said second inlet pipe and said second outlet pipe being connected to an inlet and an outlet of said coil, respectively.

5. The pulsating loop heat pipe for dissipating heat from an aircraft engine as claimed in claim 4, wherein said condenser is in the shape of a serpentine coil.

6. The pulsating loop heat pipe for dissipating heat from an aircraft engine as defined in claim 1, wherein said reservoir comprises a tank, a third inlet pipe, a third outlet pipe, and a filling port, said third inlet pipe and said third outlet pipe are connected to an inlet and an outlet of said tank, respectively, said filling port is disposed on said tank, and a liquid working medium flows into said tank from said third inlet pipe, is stored therein, and then flows out through said third outlet pipe.

7. The pulsating loop heat pipe for an aircraft engine heat dissipation as defined in claim 6, wherein said reservoir is in the shape of a cylinder.

8. The pulsating loop heat pipe for an aircraft engine heat dissipation as defined in claim 1, wherein said check valve is a one-way valve.

9. The pulsating loop heat pipe for dissipating heat from an aircraft engine as recited in claim 8, wherein said check valve comprises a valve body, a fourth inlet pipe and a fourth outlet pipe, said fourth inlet pipe and said fourth outlet pipe being connected at an inlet and an outlet of said valve body, respectively.

10. The pulsating loop heat pipe for dissipating heat of an aircraft engine as claimed in claim 1, wherein the two-phase flow heat exchange working medium adopted in the pulsating loop heat pipe is ethanol or acetone.