CN211695479U - Refrigerating device for aviation oil - Google Patents
Refrigerating device for aviation oil Download PDFInfo
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- CN211695479U CN211695479U CN201922087433.6U CN201922087433U CN211695479U CN 211695479 U CN211695479 U CN 211695479U CN 201922087433 U CN201922087433 U CN 201922087433U CN 211695479 U CN211695479 U CN 211695479U
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Abstract
The utility model discloses a refrigerating plant of aviation oil, including the vacuum pressure oil tank, vacuum pump and low temperature refrigeration unit, be provided with temperature-sensing ware in the vacuum pressure oil tank, low temperature refrigeration unit passes through oil pipe and vacuum pressure oil tank formation cyclic connection, low temperature refrigeration unit includes the compressor that connects gradually through the circulating line, the condenser, the liquid storage pot, expansion valve and evaporimeter, the liquid storage pot is including parallelly connected ethylene glycol or glycerine liquid storage pot and the freon liquid storage pot that sets up, the output of condenser is connected with tee bend electronic regulating valve, ethylene glycol or glycerine liquid storage pot are connected to tee bend electronic regulating valve's one end, freon liquid storage pot is connected to the other end, the output of ethylene glycol or glycerine liquid storage pot and freon liquid storage pot is connected to the expansion valve. The utility model provides a refrigerating plant of aviation oil has simple structure, effectively solves current refrigerating plant and takes place to block up easily, leads to the unable heat exchange of carrying on of evaporimeter and then can not reach the characteristics of required test temperature.
Description
Technical Field
The utility model belongs to the oil feeding system field, concretely relates to refrigerating plant of aviation oil.
Background
With the continuous development of aviation technology, the requirements on technical indexes such as reliability and weather resistance of some devices (such as electromagnetic valves, plunger pumps, valves and the like) of an aviation aircraft are higher and higher, a ground-to-high altitude simulation test is often performed on the designed or produced devices, and the designed or produced devices are further optimized according to data obtained by the test, wherein the devices such as the electromagnetic valves, the plunger pumps, the valves and the like are mainly used for conveying various aviation fuels (such as aviation fuel, aviation lubricating oil, aviation refrigerating fluid and the like) in the aviation aircraft, and the temperature of the fuels can undergo wide range change in the conveying process from +200 ℃ to +160 ℃ to-45 ℃ to-60 ℃, so that the devices are required to be capable of resisting the temperature change. Such tests are typically performed by an aircraft fuel simulation test system.
Whether a constant flow, constant temperature oil can be provided in such tests is critical to the ability of the test to be performed; in the prior art, a method for providing low-temperature oil is to place the oil in an insulation box, and simultaneously place an evaporator of a low-temperature system in the insulation box, so that the evaporator and the oil can exchange heat, the oil and the evaporator are installed in an oil tank, and the oil is connected with a tester of a user through an oil inlet and an oil outlet. Such an oil groove can be used marginally under low pressure, low oil viscosity and short equipment operation time, but is not suitable for use under high pressure, low temperature, long operation time and high oil viscosity conditions of a tester, because the viscosity of the liquid increases at low temperature, and the viscosity of the liquid increases greatly under extremely low temperature conditions (the viscosity of the fuel is 3.7mPas at 25 ℃, the viscosity of the liquid is 480mPas at-60 ℃, the viscosity of the liquid is 59mPas at 25 ℃, and the viscosity of the liquid is 20000mPas at-40 ℃); like this at the in-process of cooling, because the copper pipe wall in the evaporimeter is at first followed the cooling, this oil that just leads to being close to copper pipe wall in the evaporimeter easily forms the one deck oil film in the inside of copper pipe wall, and the oil film on copper pipe wall surface can be more and more thick in the evaporimeter along with the lapse of time, finally makes to lead to copper pipe wall to be blockked up, and then makes this evaporimeter can't carry out the defect that the heat exchange reaches required experimental temperature.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses a main aim at provides a refrigerating plant of aviation oil, aims at solving current refrigerating plant and takes place to block up easily, leads to the unable heat exchange of carrying out of evaporimeter and then can not reach the problem of required test temperature.
The utility model aims at realizing through the following technical scheme:
the utility model provides a refrigerating plant of aviation oil, includes vacuum pressure oil tank, vacuum pump and low temperature refrigeration unit, be provided with the temperature-sensing ware in the vacuum pressure oil tank, the vacuum pump with the vacuum pressure oil tank is connected, low temperature refrigeration unit pass through oil pipe with the vacuum pressure oil tank forms the circulation connection, low temperature refrigeration unit includes compressor, condenser, liquid storage pot, expansion valve and the evaporimeter that connects gradually through circulating line, the liquid storage pot is including parallelly connected ethylene glycol or glycerine liquid storage pot and the freon liquid storage pot that sets up, the output of condenser is connected with tee bend electronic regulating valve, tee bend electronic regulating valve's one end is connected ethylene glycol or glycerine liquid storage pot, freon liquid storage pot are connected to the other end, the output of ethylene glycol or glycerine liquid storage pot and freon liquid storage pot is connected to the expansion valve.
Preferably, the evaporator comprises a shell and a plurality of heat exchange tubes, an oil inlet and an oil outlet are respectively arranged at two ends of the shell, and a heat exchange medium inlet and a heat exchange medium outlet are respectively arranged at two ends of the side wall of the shell; the heat exchange tubes are arranged in the shell in parallel, two ends of each heat exchange tube are communicated with the oil inlet and the oil outlet respectively, and the oil inlet and the oil outlet are in circulating connection with the vacuum pressure tank through oil pipes.
Preferably, the heat exchange tube is made of brass or red copper material.
Preferably, an electric control valve is arranged on an oil pipe between an oil inlet of an evaporator in the low-temperature refrigerating unit and the vacuum pressure tank.
Preferably, the refrigerator further comprises a controller, and the vacuum pump, the temperature sensor, the low-temperature refrigerating unit, the two-way regulating valve and the electric regulating valve are all electrically connected with the controller.
Preferably, the execution module of the three-way electronic control valve is an automatic switch, when the temperature of the oil in the vacuum pressure oil tank reaches or is lower than a set temperature P1, the automatic switch automatically closes a pipeline passage between the condenser and the ethylene glycol or glycerin liquid storage tank, and simultaneously automatically opens a pipeline passage between the condenser and the freon liquid storage tank, and the three-way electronic control valve is in a closed state in a power-off state.
Preferably, the three-way electronic regulating valve further comprises a manual switch for controlling the three-way electronic regulating valve to be opened or closed and a switching device for switching between the automatic switch and the manual switch.
Preferably, the controller is embedded in a control box, a control button and a control screen are installed on the control box, and the control button and the control screen are electrically connected with the controller.
Compared with the prior art, the utility model discloses at least, following advantage has:
the utility model provides a refrigerating plant of aviation fuel, learn the temperature of the interior oil of jar through the temperature-sensing ware that sets up in vacuum pressure oil jar, at first open the pipeline between condenser and ethylene glycol or glycerine liquid storage pot through tee bend electronic regulating valve, let heat transfer medium ethylene glycol or glycerine circulate in the circulating pipeline of low temperature refrigeration unit, and when carrying out the heat transfer cooling to the oil in the vacuum pressure oil jar to P1, close the pipeline between condenser and ethylene glycol or glycerine liquid storage pot, open the pipeline between condenser and freon liquid storage pot through tee bend electronic regulating valve simultaneously, let heat transfer medium freon circulate in the circulating pipeline of low temperature refrigeration unit, and carry out the heat transfer cooling to the oil in the jar to required temperature P2 of experiment; this application carries out the stage cooling to the oil through adopting different heat transfer medium, and then has avoided the oil rapid cooling in low temperature refrigeration unit, leads to being close to the oil in the copper pipe wall of evaporimeter because the problem of the crystallization formation oil film that cooling rate leads to too fast, and then makes the flow of oil in low temperature refrigeration unit go on smoothly, for the temperature that can further cool off the oil provides probably, has effectively improved the availability factor and the life of evaporimeter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the refrigeration device provided by the present invention;
fig. 2 is a schematic structural diagram of an evaporator in a first cycle refrigerating unit of the refrigerating apparatus provided by the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The description in this application as relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Example 1
As shown in fig. 1, the aviation fuel refrigeration device comprises an oil storage tank (not shown in the figure), a vacuum pressure oil tank 1, a vacuum pump 2 and a low-temperature refrigeration unit, wherein a temperature sensor 4 is arranged in the vacuum pressure oil tank 1, the temperature sensor 4 can be a digital display temperature sensor, and an operator can directly read corresponding temperature data from the digital display temperature sensor; the oil storage tank is connected with the vacuum pressure oil tank 1 through an oil pipe, and a switch valve is arranged on the oil pipe between the oil storage tank and the vacuum pressure oil tank and used for controlling oil in the oil storage tank to be input into the vacuum pressure oil tank; vacuum pump 2 is connected with vacuum pressure oil tank 1, be connected with oil output tube 5 on the vacuum pressure oil tank 1, the oil reflux pipe, low temperature refrigeration unit passes through oil pipe and vacuum pressure oil tank 1 and forms the circulation connection, low temperature refrigeration unit includes compressor 31 through the circulating line connection in proper order, condenser 32, the liquid storage pot, expansion valve 34 and evaporimeter 35, the liquid storage pot includes parallelly connected ethylene glycol or glycerine liquid storage pot 331 and freon liquid storage pot 332 that sets up, the output of condenser 35 is connected with tee bend electronic control valve 6, ethylene glycol or glycerine liquid storage pot 331 is connected to tee bend electronic control valve 6's one end, freon liquid storage pot 332 is connected to the other end, the output of ethylene glycol or glycerine liquid storage pot 331 and freon liquid storage pot 332 is connected to expansion valve.
When the device is used, the temperature of oil in the tank is read at any time through a temperature sensor arranged in the vacuum pressure oil tank; opening a switch valve, inputting a specified amount of oil from the oil storage tank into the vacuum pressure oil tank, then closing the switch valve, opening a pipeline between the vacuum pump and the condenser and the ethylene glycol or glycerol liquid storage tank, and carrying out heat exchange circulating cooling on the oil in the tank and a heat exchange medium of the ethylene glycol or glycerol until the temperature of the oil in the tank is reduced to P1; then closing a pipeline between the condenser and the ethylene glycol or glycerol liquid storage tank, simultaneously opening the pipeline between the condenser and the freon liquid storage tank, and carrying out heat exchange circulating cooling on the oil material with the temperature reduced to P1 and a heat exchange medium of freon again until the temperature of the oil material in the tank is reduced to P2; taking the aviation fuel oil needing to be cooled to-55 ℃ as an example, the aviation fuel oil in the oil storage tank is input into a vacuum pressure oil tank, a vacuum pump and a pipeline between a condenser and an ethylene glycol or glycerin storage tank are started, and the oil in the tank and a heat exchange medium of the ethylene glycol or glycerin are subjected to heat exchange circulating cooling until the temperature of the oil in the tank is reduced to-10 ℃; then closing a pipeline between the condenser and the ethylene glycol or glycerol liquid storage tank, simultaneously opening the pipeline between the condenser and the Freon liquid storage tank, and performing heat exchange circulating cooling on the oil material with the temperature reduced to minus 10 ℃ and a heat exchange medium of Freon until the temperature of the oil material in the tank is reduced to minus 55 ℃, then closing the pipeline between the condenser and the Freon liquid storage tank, and outputting the oil material meeting the test temperature requirement through an oil material output pipe 5 to perform the next test operation;
compared with the prior art that the circulating cooling unit directly adopts Freon as a coolant to cool the oil in the vacuum pressure oil tank (when the temperature of the oil in the vacuum pressure oil tank is cooled to-38 ℃, the oil cannot flow, so that a low-temperature cooling test cannot be normally carried out); the cooling device of this application not only can make the oil reach lower cooling temperature, has also guaranteed the availability factor and the life of evaporimeter simultaneously, provides technical support for the safe handling of oil.
As shown in fig. 2, wherein the evaporator includes a housing 351 and a plurality of heat exchange tubes 352, the heat exchange tubes 352 are constructed of brass or copper material; an oil inlet 353 and an oil outlet 354 are respectively arranged at two ends of the shell 351, and a heat exchange medium inlet 355 and a heat exchange medium outlet 356 are respectively arranged at two ends of the side wall of the shell 351; the heat exchange tube 352 is arranged in the shell 351 in parallel, two ends of the heat exchange tube 351 are respectively communicated with the oil inlet 353 and the oil outlet 354, and the oil inlet 353 and the oil outlet 354 are in circulating connection with the vacuum pressure tank 1 through oil tubes;
example 2
Referring to fig. 1 again, on the basis of embodiment 1, the refrigeration device further includes a controller 8, the controller 8 is embedded in a control box, and a control button and a control screen are installed on the control box; in addition, an electric regulating valve 7 is arranged on an oil pipe between an oil inlet of the evaporator 35 and the vacuum pressure tank 1 in the low-temperature refrigerating unit, and the electric regulating valve 7 is used for opening or closing the input of the oil in the vacuum pressure tank 1 and the evaporator 35; the control button, the control screen, the vacuum pump 2, the temperature sensor 4, the low-temperature refrigerating unit, the three-way electronic regulating valve 6 and the electric regulating valve 7 are all electrically connected with the controller 8, and the controller provides technical support for intelligent automation and convenience and practicability of the refrigerating device.
The Controller may be an integrated circuit including a Micro Controller Unit (MCU). As is well known to those skilled in the art, a microcontroller may include a Central Processing Unit (CPU), a Read-Only Memory (ROM), a Random Access Memory (RAM), a timing module, a digital-to-analog conversion (a/D Converter), and several input/output ports. Of course, the control device may also be an integrated circuit in other forms, such as an Application Specific Integrated Circuit (ASIC) or a Field Programmable Gate Array (FPGA).
In addition, other parts such as a vacuum pump, a temperature sensor, a low-temperature refrigerating unit, a three-way electronic regulating valve, an expansion valve, a control box, a control button, a control screen and the like in the specification are not specially described and can be purchased and obtained from commercial sources.
Preferably, in a preferred technical solution of this embodiment, the execution module of the three-way electronic control valve 6 is an automatic switch, when the temperature of the oil in the vacuum pressure oil tank 1 reaches or is lower than the set temperature P1, the automatic switch automatically closes the pipeline between the condenser and the ethylene glycol or glycerin storage tank, and simultaneously automatically opens the pipeline between the condenser and the freon storage tank, and the three-way electronic control valve is in a closed state in the power-off state, wherein the set temperature of P1 can be set automatically according to the type of the oil actually tested, and is generally set to-5 to-20 ℃.
Preferably, in another preferred technical solution of this embodiment, the refrigeration system further includes a manual switch for controlling the three-way electronic control valve 6 to open or close and a switching device for switching between an automatic switch and the manual switch, the manual switch for controlling the three-way electronic control valve 6 to open or close is electrically connected to the controller 8, the vacuum pump 2, the temperature sensor 4, and the like, and is disposed on the control box, the manual switch can control the electric control valve to open or close, and when the controller, the vacuum pump, or the temperature sensor fails, the switching device can switch the opening or closing mode of the electric control valve to the manual switch, so that the electric control valve is opened or closed by the manual switch, and technical support is provided for ensuring safe operation of the refrigeration device.
In the operation process of the refrigerating device, the amount of oil entering the circulating cooling unit can be controlled through the electric regulating valve, the circulating amount of a heat exchange medium is controlled through the expansion valve and the three-way electronic regulating valve, the purpose of well controlling the cooling speed of the oil is achieved, the temperature of the oil in the heat exchange tube and the temperature of the heat exchange medium are adjusted to be always in the temperature difference T1 according to the type of the actual oil, and then technical support is provided for further improving the cooling temperature of the oil.
The above description is only for the preferred embodiment 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 should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The aviation fuel refrigerating device is characterized by comprising a vacuum pressure oil tank, a vacuum pump and a low-temperature refrigerating unit, a temperature sensor is arranged in the vacuum pressure oil tank, the vacuum pump is connected with the vacuum pressure oil tank, the low-temperature refrigerating unit is in circulating connection with the vacuum pressure oil tank through an oil pipe, the low-temperature refrigerating unit comprises a compressor, a condenser, a liquid storage tank, an expansion valve and an evaporator which are sequentially connected through a circulating pipeline, the liquid storage tank comprises a glycol or glycerin liquid storage tank and a Freon liquid storage tank which are arranged in parallel, the output end of the condenser is connected with a three-way electronic regulating valve, one end of the three-way electronic regulating valve is connected with the ethylene glycol or glycerin liquid storage tank, the other end of the three-way electronic regulating valve is connected with the freon liquid storage tank, and the output ends of the ethylene glycol or glycerin liquid storage tank and the freon liquid storage tank are connected to the expansion valve.
2. The aviation oil refrigeration unit of claim 1, wherein said evaporator comprises a housing and a plurality of heat exchange tubes, said housing having an oil inlet and an oil outlet at each end, and said housing having a heat exchange medium inlet and a heat exchange medium outlet at each end of a sidewall; the heat exchange tubes are arranged in the shell in parallel, two ends of each heat exchange tube are communicated with the oil inlet and the oil outlet respectively, and the oil inlet and the oil outlet are in circulating connection with the vacuum pressure tank through oil pipes.
3. An aviation oil refrigeration unit as claimed in claim 2 wherein said heat exchange tube is constructed of brass or copper material.
4. An aviation oil refrigeration unit as claimed in claim 3, wherein an electrically operated control valve is provided in the oil line between the oil inlet of the evaporator and the vacuum pressure tank in the cryogenic refrigeration unit.
5. The aviation oil refrigeration unit of claim 4 further comprising a controller, wherein said vacuum pump, temperature sensor, cryogenic refrigerator unit, two-way regulator valve and electrically operated regulator valve are electrically connected to said controller.
6. The aircraft oil refrigeration device according to claim 5, wherein the execution module of the three-way electronic control valve is an automatic switch, the automatic switch automatically closes the pipeline passage between the condenser and the ethylene glycol or glycerin storage tank and simultaneously automatically opens the pipeline passage between the condenser and the freon storage tank when the temperature of the oil in the vacuum pressure oil tank reaches or is lower than a set temperature P1, and the three-way electronic control valve is in a closed state in a power-off state.
7. An aviation oil refrigeration unit as claimed in claim 6, further comprising a manual switch for controlling the opening or closing of said three-way electronically controlled valve and switching means for switching between said automatic switch and said manual switch.
8. An aviation oil refrigeration unit as claimed in claim 7 wherein said controller is housed in a control box, said control box having control buttons and a control panel mounted thereon, said control buttons and said control panel being electrically connected to said controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922087433.6U CN211695479U (en) | 2019-11-28 | 2019-11-28 | Refrigerating device for aviation oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922087433.6U CN211695479U (en) | 2019-11-28 | 2019-11-28 | Refrigerating device for aviation oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211695479U true CN211695479U (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922087433.6U Active CN211695479U (en) | 2019-11-28 | 2019-11-28 | Refrigerating device for aviation oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211695479U (en) |
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2019
- 2019-11-28 CN CN201922087433.6U patent/CN211695479U/en active Active
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