CN209115220U - Constant-pressure two-stage electric heating device for aviation kerosene - Google Patents
Constant-pressure two-stage electric heating device for aviation kerosene Download PDFInfo
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- CN209115220U CN209115220U CN201822045278.7U CN201822045278U CN209115220U CN 209115220 U CN209115220 U CN 209115220U CN 201822045278 U CN201822045278 U CN 201822045278U CN 209115220 U CN209115220 U CN 209115220U
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Abstract
The utility model discloses an isobaric second grade electric heater unit of aviation kerosene, include: the heating device comprises a primary heating component and a secondary heating section, wherein the primary heating component comprises a heating piston cavity and a piston rod, one end of the piston rod is accommodated and installed in the heating piston cavity, and the piston rod slides in the heating piston cavity along a transverse shaft of the heating piston cavity; the heating piston cavity is communicated with a pipeline at one end of the secondary heating section; after the temperature of the aviation kerosene is raised in the primary heating component, the aviation kerosene is pushed into the secondary heating section by the piston rod at a constant pressure to be heated continuously. The device divides the kerosene heating into two stages for carrying out, and under the same safe technical condition, the heating capacity of the kerosene is greatly improved.
Description
Technical field
The utility model relates to a kind of aviation kerosine equipressure second level electric heater units, belong to air science field.
Background technique
Aviation kerosine is usually used in re-entry space vehicle as a kind of safe and reliable hydrocarbon fuel.Since its is considerable
Unit calorific value and heat sink, the coolant also frequently as air suction type punching engine.With the raising of flight Mach number, aviation kerosine
Caloric receptivity in the cooling channel sharply increases, and the hot physical property and spray combustion characteristics of the aviation kerosine after research heat absorption have ten
Divide important meaning.
But due to rapid spatial expansion after liquid fuel heat absorption, into critical state near when hot physical property change dramatically, and deposit
In high-temperature coking, the characteristic of cracking, it is difficult to the high temperature kerosene under constant pressure is obtained, so that aviation kerosine is in ground Heating Experiment
In face and many use and study difficulty.
The electric heating of aviation kerosine can be divided into according to the way of contact to be directly heated and indirect heating.
Directly heat the resistance heating by experimental part itself；Indirect heating is that heater and heating target (are referred generally to
Fluid) it separates, such as using resistance wire uniform winding in experimental piece outer surface.
When using directly heating, experimentation is simpler, but due to the general resistance very little of experimental piece, required in order to reach
Heating power, power supply must be able to export very big electric current, that is, use the power-supply device of low-voltage and high-current.This heating method
Advantage is that output voltage is very low, usually below human safety voltage, it is ensured that Danger Electric shock risk does not occur for experimenter.
When indirect heating, the biggish resistance wire of resistance can be used as heater, due to depositing between heater and experimental piece
In distance, therefore heater design structure can be versatile and flexible, is avoided that and is restricted by experimental piece surface.
The electric heating of aviation kerosine can be divided into heated in real-time according to energy storage mode and heat accumulating type heats.
Heated in real-time refers to that fluid keeps flowing in bringing-up section, is heated up by the heat transfer process in residence time.It is this to change
Hot mode is rapid, and the fluid mass being in bringing-up section is less, but required electrical power is higher, and heat flow density is very in bringing-up section
Height, and heating temperature and flow need to monitor in real time and adjust.
Heat accumulating type is heated to the stationary fluid of certain mass, etc. temperature be increased to after target temperature carry out again it is next
Step processing.Heating power needed for this mode is smaller, longer heating time is allowed in the case where heat-retaining condition is good, still
Fluid mass is big in bringing-up section, thermal expansion process is serious, sealing to bringing-up section and larger using safe difficulty, is usually used in lower
The heating of temperature.
But above-mentioned all kinds of existing aviation kerosine heating methods are respectively present following technical problem:
(1) magnitude of current transmitted when directly heating is big, it is desirable that sectional area of wire is excessive, or even is replaced using copper sheet or copper rod
Conducting wire, this can make power-supply device volume excessively huge；
(2) when being directly heated using alternating current, can and surrounding electric elements generate electromagnetic interference, intensity with electric current increase and
Increase；
(3) resistance is larger in electric heating indirectly, and power supply need to be made using big voltage low current although electromagnetic interference is smaller
With in the process it should be noted that insulation, deals with improperly and is easy to jeopardize instrument and experimenter's safety；
(4) single heat accumulating type heating efficiency is limited, is only applicable to low-temperature heat.For expanding phase change fluid, heating process
Middle pressure will be increased constantly；For that can not be heated for a long time with coking property fluid.
Utility model content
According to the one aspect of the application, a kind of aviation kerosine equipressure second level electric heater unit is provided, the device is by coal
Oil heating is divided into two-stage progress, under identical safety specification, so that the heating efficiency of kerosene is substantially improved.
The aviation kerosine equipressure second level electric heater unit, comprising: level-one heating component and second level bringing-up section,
The level-one heating component includes: heating plunger shaft and piston rod, and one end of the piston rod, which accommodates, is installed on institute
It states in heating plunger shaft, the piston rod slides in the heating plunger shaft along the heating plunger shaft lateral shaft；
One end pipeline connection of the heating plunger shaft and the second level bringing-up section；
After the aviation kerosine heats up in the level-one heating component, the second level is promoted to add by the piston rod constant pressure
Continue to heat in hot arc.
Preferably, the aviation kerosine equipressure second level electric heater unit includes: nitrogen source, and the nitrogen source and the level-one heat
Component pipeline connection, the nitrogen source and the second level bringing-up section pipeline connection；
The nitrogen source drives the piston rod to move in the heating plunger shaft.
Preferably, the aviation kerosine equipressure second level electric heater unit includes: filter house, third high temperature valve and counterbalance valve,
The other end of the second level bringing-up section and the inlet end pipeline connection of recoverer；
The third high temperature valve is installed on the inlet end of the filter house；
The counterbalance valve is installed on the outlet side of the filter house.
Preferably, the level-one heating component includes: to heat piston cavity, first baffle and second baffle, and described first
Baffle is installed on one end of the heating piston cavity；
The second baffle is installed in the second end of the heating piston cavity；
The piston rod passes through second baffle sliding setting.
Preferably, interval opens up pressure probe interface, kerosene outlet and temp probe interface on the first baffle；Institute
State kerosene outlet and the second level bringing-up section piping connection；
Probe groove is opened up on the inner surface of the first baffle, the probe groove is set to the pressure probe interface
Between the kerosene outlet.
Preferably, nitrogen inlet is opened up on the second baffle.
Preferably, the first baffle and the heating piston cavity joint are to be tightly connected；
The second baffle and the heating piston cavity joint are to be tightly connected；
The mounting hole joint opened up on the piston rod and the second baffle is sealed connection.
Preferably, the aviation kerosine equipressure second level electric heater unit includes: cooling recovery pipe and transfer pipeline, described
The kerosene that transfer pipeline is used to be up to predetermined temperature is delivered to next section；
The cooling recovery pipe is used to carry out the aviation kerosine of not up to predetermined temperature cooling recycling；
The cooling recovery pipe and the transfer pipeline are connected with the oil outlet of the second level bringing-up section respectively.
Preferably, the first baffle and the heating piston cavity joint are equipped with metal wound gasket circle；
The second baffle and the heating piston cavity joint are equipped with metal wound gasket circle；
The mounting hole joint opened up on the piston rod and the second baffle is equipped with metal c-type sealing ring.
Preferably, the aviation kerosine equipressure second level electric heater unit includes: the first high-temperature valve, the second high-temperature valve, third
High-temperature valve and the 4th high-temperature valve, first high-temperature valve are set to the level-one heating component and are connected with the second level bringing-up section
Pipeline on；
Second high-temperature valve is set to the pipeline that the level-one heating component is connected with the nitrogen source；
The third high temperature valve is set on the pipeline that the second level bringing-up section is connected with the filter house；
On the pipeline for the discharge section that 4th high-temperature valve is set to the second level bringing-up section.
The beneficial effects of the utility model include but is not limited to:
(1) aviation kerosine equipressure second level electric heater unit provided by the utility model, the device pass through adding kerosene
Thermal process is split as second level, so that heat-accumulating process reduces the load of heated in real-time section, reduces heating power, power volume, sealing
The unfavorable factors such as difficulty, security risk effectively improve the upper limit of kerosene heating temperature.Due to being divided into second level heating, so that
Residence time of the high temperature kerosene in entire bringing-up section shortens, and reduces kerosene coking amount；
(2) aviation kerosine equipressure second level electric heater unit provided by the utility model, in the device level-one heating component,
Heating chamber is heating piston cavate, propulsion and pressurization by piston rod to kerosene, it is ensured that pressure when kerosene heats is permanent
It is fixed.When being heated using the device, kerosene heating process is in always in constant pressure environment, and hot physical property changing rule can root
According to needing to be adjusted, facilitate transporting and being further processed for hot coal oil, and avoid airtight heating section pressure and sharply increase
The problem of；
(3) aviation kerosine equipressure second level electric heater unit provided by the utility model, in the device level-one heating component
It heats plunger shaft configuration both ends and uses flange seal, guarantee piston baffle whole sliding in the cavity.The device integrally uses directly
Galvanic electricity heating, avoids influence of the electromagnetic interference to air equipment.
Detailed description of the invention
Fig. 1 is aviation kerosine equipressure second level electric heater unit structural schematic diagram in an embodiment of the present invention；
Fig. 2 is that aviation kerosine equipressure second level electric heater unit computer heating control timing is illustrated in an embodiment of the present invention
Figure；
Fig. 3 is level-one heating component main view schematic cross-sectional view in an embodiment of the present invention.
Marginal data:
P1, first pressure sensor；P2, second pressure sensor；P3, third pressure sensor；P4, the 4th pressure sensing
Device；T1, the first temperature sensor；T2, second temperature sensor；T3, third temperature sensor；R1, counterbalance valve；R2, relief valve；
100, level-one heating component；200, second level bringing-up section；300, filter house；400, nitrogen source；110, first baffle；140, second gear
Plate；111, temp probe interface；112, kerosene exports；113, pressure probe interface；114, probe groove；120, piston is heated
Chamber；131, piston baffle；132, baffle connection rod；141, nitrogen inlet.
Specific embodiment
The utility model is described in detail below with reference to embodiment, but the utility model is not limited to these embodiments.
Referring to Fig. 1, aviation kerosine equipressure second level electric heater unit provided by the utility model, comprising: level-one heating component
100 and second level bringing-up section 200, level-one heating component 100 includes heating plunger shaft and piston rod, and one end of the piston rod accommodates
It is installed in the heating plunger shaft, the piston rod is sliding along the heating plunger shaft lateral shaft in the heating plunger shaft
It is dynamic；
One end pipeline connection of the heating plunger shaft and the second level bringing-up section 200；The aviation kerosine is described one
After heating up in grade heating component 100, is promoted in the second level bringing-up section 200 by the piston rod constant pressure and continue to heat.
In one embodiment, it in use, kerosene fills heating piston cavity in advance first, then by piston rod and heats
After plunger shaft assembles as shown in Figure 3, the heating devices such as winding electricity companion heating tape or radiant heating source on the outside of heating piston cavity,
By shell heat absorption conduction to the heating intracorporal kerosene of plunger shaft, the temperature rise of kerosene is realized.
After kerosene is heated to preset temperature in level-one heating component 100, the promotion in plunger shaft is being heated by piston rod,
It will continue to heat in the kerosene push-in second level bringing-up section 200 after heating.Second level bringing-up section 200 can be by adding in its outer surface
Heating device heats wherein kerosene.
Preferably, including nitrogen source 400, the nitrogen source 400 and 100 pipeline connection of level-one heating component, the nitrogen source
400 with 200 pipeline connection of second level bringing-up section；The nitrogen source 400 drives the piston rod to move in the heating plunger shaft
It is dynamic.
In use, before being passed through kerosene, it can be by 400 supplying nitrogen of nitrogen source respectively to level-one heating component 100 and two
Grade 200 pipe of bringing-up section carries out emptying process, improves the quality of kerosene after heating.It simultaneously can also be by the purging of nitrogen, to residual
Kerosene is emptied.
Preferably, temperature sensor and pressure sensor are set in the heating plunger shaft.
In use, can be heated in plunger shaft according to the temperature value and pressure value read in heating plunger shaft, adjustment
The pressure value and temperature value of aviation kerosine when being easy to use, control heating process and apply pressure to kerosene.Improve heating efficiency
With heating accuracy.
Preferably, the aviation kerosine equipressure second level electric heater unit includes filter house 300, third high temperature valve and back pressure
Valve, the other end of the second level bringing-up section 200 and the inlet end pipeline connection of the recoverer；The third high temperature valve is installed on
On the inlet end of the filter house 300；The counterbalance valve is installed on the outlet side of the filter house 300.
The opening and closing of third high temperature valve described in the third solenoid valve control can be passed through.
The pipeline can be used for that kerosene is discharged.R1 is unloading valve to adjust upstream pressure, R2 for counterbalance valve, guarantees pipeline
Blocking-resistant safety.
According to the needs of use, it after kerosene after heating is completely exhausted out, then opens the nitrogen source 400 of one end and opens third
High-temperature valve and counterbalance valve, after filter house 300, kerosene is recycled the gas containing kerosene, and nitrogen then empties, and improves kerosene
Utilization efficiency, avoid waste.
Specifically, the device includes: nitrogen source 400, level-one heating component 100, second level bringing-up section 200, filter house 300,
One pressure sensor, second pressure sensor, third pressure sensor, the first temperature sensor, second temperature sensor, third
Temperature sensor, the first high-temperature valve, the second high-temperature valve, the 4th high-temperature valve of third high temperature valve.Nitrogen source 400 heats structure with level-one respectively
One end pipeline connection of part 100, second level bringing-up section 200.Is arranged on the pipeline that nitrogen source 400 is connected with second level bringing-up section 200
Two high-temperature valves.First pressure sensor and the first temperature sensor are installed in level-one heating component 100.Level-one heating component 100,
By the first high-temperature valve on the pipeline that second level bringing-up section 200 is connected.The other end and 300 pipeline of filter house of second level bringing-up section 200
Connection.Second temperature sensor, second pressure sensor, the are installed on the pipeline that second level bringing-up section 200 is connect with filter house 300
Three high-temperature valves.Counterbalance valve and relief valve are set on the outlet side of filter house 300.The other end of second level bringing-up section 200 is additionally provided with row
Produce coal oil pipe line.The 4th high-temperature valve, third pressure sensor and third temperature sensor are installed on discharge kerosene pipeline.
Referring to fig. 2, when transporting kerosene to next stage, kerosene sequentially passes through level-one heating component 100, the first high-temperature valve, two
Grade bringing-up section 200, the 4th pressure sensor, second pressure sensor, second temperature sensor, the 4th high-temperature valve, third pressure
Sensor, third temperature sensor.
When discharging kerosene, be first turned on the nitrogen source 400 being connected with level-one heating component 100, and open the first high pressure valve,
Third high pressure valve, counterbalance valve close the 4th high pressure valve, to recycle residual coal in level-one heating component 100 and second level bringing-up section 200
Oil.
When remaining kerosene in recovery pipe, the difference with pipeline connection when discharge kerosene is only that: closing counterbalance valve and the
Three high-temperature valves open relief valve discharge residual kerosene.
Preferably, the aviation kerosine equipressure second level electric heater unit includes: cooling recovery pipe and transfer pipeline, described
The kerosene that transfer pipeline is used to be up to predetermined temperature is delivered to next section；The cooling recovery pipe is used for not up to predetermined
The aviation kerosine of temperature carries out cooling recycling；The cooling recovery pipe and the transfer pipeline add with the second level respectively
The oil outlet of hot arc is connected.
Transfer pipeline and cooling recovery pipe are conducting hot coal oil, but its function is different, the generation of this and hot coal oil
Process and use purpose are related: after heating, workable hot coal oil needs to reach set temperature and pressure, this temperature-rise period
Completion need to be reached in proper order, primary heating is only carried out and be difficult to instantaneously reach predetermined temperature.The unqualified kerosene for not reaching preset temperature, needs
It to be disposed from cooling recovery pipe, and the kerosene of temperature, pressure qualification just can enter next link from transfer pipeline.
The kerosene of predetermined temperature is not arrived without being recycled into level-one heating device.Directly it is recycled the stage.
When the kerosene after two sections of heating, after not reaching predetermined temperature, it is discharged after filter house 300 is cooling.Coal at this time
The temperature of oil is usually less than 700K, and wherein ingredient is to change, and still can be used as initial kerosene after the cooling of filter house 300 makes
With.It include cooling link in cooling recovery pipe, uncracked low temperature kerosene may be recovered under not stringent use condition
It recycles.700K or more, which is cracked into, separates existing variation, then corresponding physical property changes, and can not use as initial kerosene.
It is unloading valve referring to Fig. 1, R2, effect is high pressure relief, and R2 pipeline is security insurance pipeline.V3, R1 are to cool back
Closed tube road will not reach recycles with after the cooling of the kerosene of predetermined temperature, and is discharged as needed.Transfer pipeline is V4, P3, T3.
Referring to Fig. 3, it is preferable that the level-one heating component 100 includes heating piston cavity, first baffle 110 and second
Baffle 140, the first baffle 110 are installed on one end of the heating piston cavity；The second baffle 140 is installed on institute
In the second end for stating heating piston cavity；The piston rod passes through the second baffle 140 sliding setting.
Preferably, interval opens up pressure probe interface 113, kerosene outlet 112 and temp probe on the first baffle 110
Interface 111；The kerosene outlet 112 and 200 piping connection of second level bringing-up section；On the inner surface of the first baffle 110
Open up probe groove 114, the probe groove 114 be set to the pressure probe interface 113 and kerosene outlet 112 it
Between.
In order to keep cavity to seal and convenient for unpicking and washing, the company of first baffle 110 and second baffle 140 and heating piston cavity
It is connected in flange seal connection, this mode also may make baffle in the intracavitary accessible sliding of whole process.Pressure on first baffle 110 is visited
Head interface 113, temp probe interface 111 and kerosene outlet 112 are respectively used to survey the discharge of pressure, thermometric and kerosene.Survey pressure and coal
The groove of temperature probe is set in the interior sidewall surface between oil export 112, baffle is avoided to cause to damage to probe in moving process
Evil.
Preferably, nitrogen inlet 141 is opened up on the second baffle 140.Driving piston rod is accessed by nitrogen inlet 141
Nitrogen, thus only need adjust nitrogen pressure, kerosene can be made to be maintained at pressure constant state.
Preferably, the first baffle 110 and the heating piston cavity joint, the second baffle 140 with it is described
Piston cavity joint, the piston rod and the 140 hole joint of second baffle are heated, is to be tightly connected.
Preferably, described to be tightly connected to be connected by fluororubber O-type ring.
Using temperature up to 250 DEG C.Heating for overcritical cracking state kerosene, the ability of level-one heating can be into one
Step is promoted.
Preferably, the first baffle 110 and the heating piston cavity joint, the second baffle 140 with it is described
It heats piston cavity joint, be metal wound gasket circle；The piston rod and the 140 hole joint of second baffle are metal
C-type sealing ring.
Being sealed setting by this can make use temperature upper limit reach 450-500 DEG C.
Piston rod is as shown in Figure 3, comprising: piston baffle 131 and baffle connection rod 132, baffle connection rod 132 pass through second baffle
140.Piston baffle 131 is set to one end of baffle connection rod 132.
The above is only several embodiments of the utility model, not does any type of limitation to the utility model,
Although the utility model is disclosed as above with preferred embodiment, any to be familiar with this profession not to limit the utility model
Technical staff made using the technology contents of the disclosure above a little in the range of not departing from technical solutions of the utility model
Variation or modification be equal to equivalence enforcement case, belong in technical proposal scope.
Claims (10)
1. a kind of aviation kerosine equipressure second level electric heater unit characterized by comprising level-one heating component and second level heating
Section,
The level-one heating component includes: heating plunger shaft and piston rod, and one end of the piston rod, which accommodates, is installed on described add
In hot plunger shaft, the piston rod is slided in the heating plunger shaft along the heating plunger shaft lateral shaft；
One end pipeline connection of the heating plunger shaft and the second level bringing-up section；
After the aviation kerosine heats up in the level-one heating component, the second level bringing-up section is promoted by the piston rod constant pressure
In continue to heat.
2. aviation kerosine equipressure second level electric heater unit according to claim 1, which is characterized in that described aviation kerosine etc.
Pressing second level electric heater unit includes: nitrogen source, the nitrogen source and the level-one heating component pipeline connection, the nitrogen source and described two
Grade bringing-up section pipeline connection；
The nitrogen source drives the piston rod to move in the heating plunger shaft.
3. aviation kerosine equipressure second level electric heater unit according to claim 2, which is characterized in that described aviation kerosine etc.
Pressing second level electric heater unit includes: filter house, third high temperature valve and counterbalance valve, the other end and recoverer of the second level bringing-up section
Inlet end pipeline connection；
The third high temperature valve is installed on the inlet end of the filter house；
The counterbalance valve is installed on the outlet side of the filter house.
4. aviation kerosine equipressure second level electric heater unit according to claim 1, which is characterized in that the level-one heats structure
Part includes: heating piston cavity, first baffle and second baffle, and the first baffle is installed on the one of the heating piston cavity
On end；
The second baffle is installed in the second end of the heating piston cavity；
The piston rod passes through second baffle sliding setting.
5. aviation kerosine equipressure second level electric heater unit according to claim 4, which is characterized in that on the first baffle
Interval opens up pressure probe interface, kerosene outlet and temp probe interface；The kerosene outlet and the second level bringing-up section pipeline
Connection；
Probe groove is opened up on the inner surface of the first baffle, the probe groove is set to the pressure probe interface and institute
It states between kerosene outlet.
6. aviation kerosine equipressure second level electric heater unit according to claim 4, which is characterized in that on the second baffle
Open up nitrogen inlet.
7. aviation kerosine equipressure second level electric heater unit according to claim 4, which is characterized in that the first baffle with
The heating piston cavity joint is to be tightly connected；
The second baffle and the heating piston cavity joint are to be tightly connected；
The mounting hole joint opened up on the piston rod and the second baffle is sealed connection.
8. aviation kerosine equipressure second level electric heater unit according to claim 7, which is characterized in that described aviation kerosine etc.
Pressure second level electric heater unit includes: cooling recovery pipe and transfer pipeline, and the transfer pipeline is for being up to predetermined temperature
Kerosene is delivered to next section；
The cooling recovery pipe is used to carry out the aviation kerosine of not up to predetermined temperature cooling recycling；
The cooling recovery pipe and the transfer pipeline are connected with the oil outlet of the second level bringing-up section respectively.
9. aviation kerosine equipressure second level electric heater unit according to claim 7, which is characterized in that the first baffle with
The heating piston cavity joint is equipped with metal wound gasket circle；
The second baffle and the heating piston cavity joint are equipped with metal wound gasket circle；
The mounting hole joint opened up on the piston rod and the second baffle is equipped with metal c-type sealing ring.
10. aviation kerosine equipressure second level electric heater unit according to claim 3, which is characterized in that the aviation kerosine
Isobaric second level electric heater unit includes: the first high-temperature valve, the second high-temperature valve, third high temperature valve and the 4th high-temperature valve, and described first
High-temperature valve is set on the pipeline that the level-one heating component is connected with the second level bringing-up section；
Second high-temperature valve is set to the pipeline that the level-one heating component is connected with the nitrogen source；
The third high temperature valve is set on the pipeline that the second level bringing-up section is connected with the filter house；
On the pipeline for the discharge section that 4th high-temperature valve is set to the second level bringing-up section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822045278.7U CN209115220U (en) | 2018-12-06 | 2018-12-06 | Constant-pressure two-stage electric heating device for aviation kerosene |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822045278.7U CN209115220U (en) | 2018-12-06 | 2018-12-06 | Constant-pressure two-stage electric heating device for aviation kerosene |
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| Publication Number | Publication Date |
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| CN209115220U true CN209115220U (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404162A (en) * | 2018-12-06 | 2019-03-01 | 中国人民解放军国防科技大学 | Constant-pressure two-stage electric heating device for aviation kerosene |
-
2018
- 2018-12-06 CN CN201822045278.7U patent/CN209115220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404162A (en) * | 2018-12-06 | 2019-03-01 | 中国人民解放军国防科技大学 | Constant-pressure two-stage electric heating device for aviation kerosene |
| CN109404162B (en) * | 2018-12-06 | 2023-12-15 | 中国人民解放军国防科技大学 | Aviation kerosene isobaric secondary electric heating device |
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