Pod wind-liquid conversion device

Abstract

The invention discloses a nacelle wind-liquid conversion device which is installed in an external nacelle of an aircraft with the flight Mach number of 0.5-0.8 and the flight height of 5000-8000 m in a built-in mode, and the nacelle wind-liquid conversion device comprises a nacelle body structural part with an air entraining opening and an exhaust opening. An air-liquid heat exchanger, a liquid filter, an expansion type liquid storage tank, a micro liquid pump and an air-liquid conversion system data acquisition and upper computer communication box are arranged in the cabin body structural member. Compared with an existing reverse boosting type air circulation system and an evaporation circulation system, accessories such as a turbine and a compressor do not exist in the system, cold air introduced from a pod stamping opening is directly used for cooling cooling liquid, and although no ground cooling capacity exists, the refrigeration performance and the temperature control accuracy are lower than those of an evaporation refrigeration circulation system, and the cooling performance and the temperature control accuracy are not lower than those of the evaporation refrigeration circulation system. The application range is limited to a certain extent, but the device is simple in structure, low in cost and good in reliability, and still has wide application scenes on more nacelles or airborne electronic equipment.

Description

Technical Field

[0001] The invention belongs to an environmental control subsystem of an aircraft electronic mission pod, and specifically relates to a device in which the mission pod mainly uses liquid cooling for heat dissipation but the aircraft cannot provide a liquid cooling circuit, and the system cooling function is realized only by the pod itself. Background Art

[0002] A pod is a piece of equipment mounted on the outside of an aircraft, mostly equipped on fighter jets, which can greatly enhance the tactical capabilities of the aircraft. For pods equipped with electronic equipment, temperatures that are too high or too low are not conducive to the normal operation of the equipment, and too high a temperature may even cause equipment failure. Therefore, due to restrictions on the installation position in the pod, the in-flight environmental control system cannot directly provide low-temperature air or low-temperature coolant for the pod. Therefore, an independent environmental control system is required for the electronic pod. At present, the pod environmental control systems developed domestically and abroad mainly include two categories: reverse boost air circulation systems and evaporative circulation systems.

[0003] Reverse boost air circulation system: The ram air first expands and cools through the turbine, and the low-temperature air flows through the electronic equipment to absorb heat. The air after absorbing heat is sucked by the compressor and discharged out of the pod after boosting. Due to the suction effect of the compressor, the turbine exhaust pressure is less than the ambient static pressure, thus achieving the effect of increasing the turbine expansion ratio. The refrigerant for cooling the electronic equipment is the air cooled by the turbine. The refrigeration capacity of the turbine will increase with the increase of the flight Mach number. The core component is the turbine, and the key design is the design and arrangement of the pod ram port and the air inlet. The bleed air flow and pressure directly affect the turbine efficiency.

[0004] Evaporative refrigeration cycle system: After the refrigerant is compressed by the compressor, it evaporates in the evaporator to absorb heat to cool the liquid (refrigerant), and then the cooled refrigerant absorbs the heat load of the electronic equipment in the electronic pod. The condenser uses ram air as the cold source. The refrigerant for cooling the electronic equipment is the refrigerant that has been cooled by the evaporator. Summary of the invention

[0005] In order to overcome the defects existing in the existing reverse boost air circulation system and evaporative circulation system, the present invention aims to provide a pod air-to-liquid conversion device, which realizes the heat dissipation of the pod with a new architecture according to the technical index requirements of the pod, and is simpler than the reverse boost air circulation system and the evaporative circulation system, with a simple device structure, high reliability and low cost.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A pod air-liquid conversion device is installed in an external pod of an aircraft with a flight Mach number of 0.5 to 0.8 and a flight altitude of 5000 to 8000 m in a built-in form, and the pod air-liquid conversion device includes a pod structure with an air inlet and an exhaust port, and the pod structure is provided with:

[0008] An air-liquid heat exchanger, wherein the cold side inlet of the air-liquid heat exchanger is connected to the air bleed port, and the cold side outlet of the air-liquid heat exchanger is connected to the external environment of the aircraft through the exhaust port;

[0009] A liquid filter, wherein the inlet of the liquid filter is connected to the hot side outlet of the air-liquid heat exchanger, the outlet of the liquid filter is connected to the liquid outlet of the air-liquid conversion system, and a pressure sensor and a temperature sensor are also provided between the outlet of the liquid filter and the liquid outlet of the air-liquid conversion system;

[0010] An expansion type liquid storage tank, wherein the inlet of the expansion type liquid storage tank is connected to the inlet of the liquid path of the air-liquid conversion system, a pressure sensor and a temperature sensor are further provided between the inlet of the expansion type liquid storage tank and the inlet of the liquid path of the air-liquid conversion system, and a liquid injection port of the air-liquid conversion system is also provided on the expansion type liquid storage tank;

[0011] A micro liquid pump, the micro liquid pump being arranged between the outlet of the expansion type liquid storage tank and the hot side inlet of the air-liquid heat exchanger;

[0012] The air-liquid conversion system data acquisition and host computer communication box are respectively connected to the pressure sensor, the temperature sensor and the host computer.

[0013] As an option, the cabin structure is cylindrical, and the air inlet and exhaust port on the cabin structure are connected to the cold side inlet and cold side outlet of the air-liquid heat exchanger through a ram air interface hose and a clamp.

[0014] As an option, the air-liquid heat exchanger is one of a shell and tube heat exchanger, a plate-fin heat exchanger or a tube-fin heat exchanger. The air-liquid heat exchanger includes a ram air inlet and outlet cover, a heat exchanger core assembly and a liquid side inlet and outlet cover. The cold side inlet and cold side outlet of the heat exchanger core assembly are connected to the air inlet and exhaust port respectively through the ram air inlet and outlet cover, and the hot side inlet and hot side outlet of the heat exchanger core assembly are connected to the micro liquid pump and liquid filter respectively through the liquid side inlet and outlet cover.

[0015] As an option, the expansion liquid storage tank is integrated with a pressure sensor mounting seat, a temperature sensor mounting seat, an air-liquid conversion system liquid path outlet mounting seat, an air-liquid conversion system liquid path inlet mounting seat, an air-liquid conversion system liquid injection port mounting seat, a micro liquid pump mounting seat and a liquid filter mounting seat.

[0016] As an option, the micro liquid pump is a liquid gear pump driven by a brushless DC motor.

[0017] As an option, the expansion type liquid storage tank is a pull rope type liquid storage tank, including an expansion tank shell with a liquid level gauge, an expansion tank end cover is installed at one end of the expansion tank shell, a pull rope mounting seat is installed on the outer surface of the expansion tank end cover, a dust cover is installed on the outer side of the pull rope mounting seat, a pull rope pulley is arranged between the pull rope mounting seat and the dust cover, an expansion spring and an expansion piston are arranged in the inner cavity of the expansion tank shell, one end of the expansion spring is close to the expansion piston, and the other end is close to the expansion tank end cover, one end of the liquid level pull rope is connected to the expansion piston, and the other end extends into the liquid level gauge through the pull rope pulley and is connected to the liquid level gauge display plug.

[0018] As an option:

[0019] The air-liquid heat exchanger and the micro liquid pump are connected via a pump diffuser assembly;

[0020] The air-liquid heat exchanger and the liquid filter are connected via a bulk filter tube assembly;

[0021] The liquid filter and the liquid outlet of the air-liquid conversion system are connected via a filter outlet pipe assembly;

[0022] The pump diffuser pipe assembly, diffuser filter pipe assembly and filter outlet pipe assembly are all pipe fittings with flange structures at both ends.

[0023] As an option, the liquid filter includes a liquid filter seat, which is provided with a liquid inlet and a liquid outlet, a liquid filter pressure difference signal device is installed at one end of the liquid filter seat, a liquid filter housing is installed at the other end of the liquid filter seat, a liquid filter element assembly is installed in the inner cavity of the liquid filter housing, one end of the liquid filter element assembly is a liquid filter bypass valve, and a liquid filter maintenance valve and a liquid filter maintenance valve spring are arranged in the liquid filter seat and between the liquid outlet and the liquid filter element assembly.

[0024] As an option, the air-to-liquid conversion system liquid path outlet, the air-to-liquid conversion system liquid path inlet and the air-to-liquid conversion system liquid injection port are fluid connectors.

[0025] As an option, the air-to-liquid conversion system data acquisition and host computer communication box includes a CAN interface circuit and is connected to the host computer via a CAN bus.

[0026] Compared with the evaporative refrigeration cycle system and the reverse boost air circulation system in the prior art, the pod air-to-liquid conversion device of the present invention directly uses ram air as a cold source to cool the refrigerant, and then absorbs the heat load of the electronic equipment in the electronic pod through the cooled refrigerant. After evaluations such as preliminary structural design, optimized structural design, performance strength simulation, and process realization, the present invention has been able to meet the technical indicators of the pod, has low requirements for cooling the electronic equipment, and can operate within a certain flight envelope. The design of the present invention can meet the requirements of a simple pod system, high reliability, and low cost.

[0027] The present invention integrates an expansion liquid storage tank, a micro liquid pump, an air-liquid heat exchanger, a liquid filter, a temperature and pressure sensor and a differential pressure sensor in a limited space, and uses a data acquisition and host computer communication box to perform health management on the pod air-liquid conversion device. The micro liquid pump consumes 100W of power and uses 24V DC power transmission. The power supply used is consistent with that of data acquisition, temperature, pressure, differential pressure sensors, data acquisition and host computer communication, and no repeated power conversion is required.

[0028] The present invention is essentially different from the current reverse boost air circulation system and evaporative circulation system. The present invention does not have accessories such as turbines and compressors, and directly uses the cold air introduced by the pod stamping port to cool the coolant. Although it does not have ground cooling capacity, the refrigeration performance and temperature control accuracy are not as good as the evaporative refrigeration cycle system, and the scope of use is subject to certain restrictions, it has a simple structure, low cost, and good reliability, and still has a wide range of application scenarios in the use of more pods or airborne electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the installation space dimensions provided by the pod for the air-to-liquid conversion device;

[0030] In the figure: φA is the maximum outer diameter of the pod, φB is the maximum inner diameter of the pod, L is the maximum axial installation dimension provided by the pod for the air-liquid conversion device, 1-expansion type liquid storage tank, 2-micro liquid pump, 3-pump diffuser assembly, 4-air-liquid heat exchanger, 5-diffusion filter assembly, 6-liquid filter, 7-filter outlet pipe assembly, 8-air-liquid conversion system liquid outlet, 9-temperature sensor, 10-pressure sensor, 11-air-liquid conversion system liquid inlet, 12-air-liquid conversion system liquid injection port, 13-air-liquid conversion system data acquisition and upper computer communication box, 14-rammed air interface hose, 15-clamp, 16-cabin structure, 1601-air inlet, 1602-exhaust port;

[0031] Figure 2 This is a schematic diagram of the composition of the pod air-liquid conversion device of the present invention;

[0032] Figure 3This is a basic schematic diagram of the core component of the present invention, the air-liquid heat exchanger;

[0033] In the figure: 4001-ram air inlet and outlet cover, 4002-air side sealing gasket, 4003-liquid side inlet and outlet cover, 4004-heat exchanger core assembly, 4005-heat exchanger air side flange;

[0034] Figure 4 It is a schematic diagram of the basic components of the expansion type liquid storage tank of the present invention;

[0035] In the figure: 1001-expansion tank housing, 1002-expansion tank end cover, 1003-pull rope mounting seat, 1004-dust cover, 1005-pull rope pulley, 1006-liquid level pull rope, 1007-expansion spring, 1008-expansion piston, 1009-liquid level gauge compression spring, 1010-liquid level gauge display plug;

[0036] Figure 5 is a schematic diagram of a micro liquid pump;

[0037] In the picture: 2001- DC brushless motor, 2002- gear pump head;

[0038] Figure 6 It is a schematic diagram of liquid filtration in the present invention;

[0039] In the figure: 6001-liquid filter pressure difference signal device, 6002-liquid filter seat, 6003-liquid filter housing, 6004-elastic retaining ring for hole, 6005-liquid filter bypass valve, 6006-liquid filter element assembly, 6007-liquid filter maintenance valve; 6008-liquid filter maintenance valve spring;

[0040] Figure 7 It is a schematic diagram of the pump diffuser assembly of the present invention;

[0041] In the figure: 3001- pump connection flange, 3002- pump bulk pipe, 3003- bulk connection flange;

[0042] Figure 8 It is a schematic diagram of the scattered filter tube assembly in the present invention;

[0043] In the figure: 3003- bulk connection flange, 5001- bulk filter tube, 5002- filter connection flange;

[0044] Fig. 9 is a schematic diagram of a filtrate pipe assembly in the present invention;

[0045] In the figure: 5002-filter connection flange, 7001-filtrate pipe;

[0046] Fig.10 It is a schematic diagram of the installation base plate of the hollow-liquid heat exchanger and the expansion type liquid storage tank of the present invention;

[0047] Fig.11 This is the basic functional block diagram of the data acquisition and host computer communication box of the present invention;

[0048] Fig.12 It is a schematic diagram of the fluid connector selected for the supply / return / injection port of the present invention;

[0049] In the figure: 17 - supply / return fluid connector, 18 - injection fluid connector;

[0050] Fig.13 It is a schematic diagram of the pod air-liquid conversion device assembly in the present invention. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0052] like Figure 1 As shown, a pod air-liquid conversion device designed for the present invention includes an expansion liquid storage tank 1, a micro liquid pump 2, a pump diffuser assembly 3, an air-liquid heat exchanger 4, a diffuser filter assembly 5, a liquid filter 6, a filter outlet pipe assembly 7, an air-liquid conversion system liquid outlet 8, a temperature sensor 9, a pressure sensor 10, an air-liquid conversion system liquid inlet 11, an air-liquid conversion system liquid injection port 12, an air-liquid conversion system data acquisition and upper computer communication box 13, a ram air interface hose 14, a clamp 15 and a cabin structure 16. The architecture of the device is the focus of the present invention.

[0053] like Figure 1 As shown, the pod air-liquid conversion device is designed according to the maximum system arrangement space that the pod can provide: pod outer diameter φA, inner diameter: φB, axial dimension: L. Under the premise of ensuring the requirements of interface, performance, strength, weight, etc., the pod space needs to be fully utilized. Based on the above ideas, the functional performance allocation and design of the pod air-liquid conversion device are carried out. Figure 2 The function and principle of the pod air-to-liquid conversion device are demonstrated.

[0054] 1. First, the performance calculation of the air-liquid heat exchanger 4 in the pod air-liquid conversion device is completed. By comparing the shell and tube type, plate-fin type, tube-fin type and other structures, the plate-fin type structure is preferred. The performance calculation of the air-liquid heat exchanger 4 is completed under the following conditions:

[0055] Cold side inlet conditions: flight Mach number is 0.5-0.8; flight altitude is 5000-8000m. Flight altitude determines air density and temperature. Flight Mach number and windward surface area of ​​pod ram air bleed port 1601 directly affect cold side inlet flow. Among the flow influencing factors, in addition to these three factors, the combined resistance of the cold side ram air inlet and exhaust duct of the heat exchanger is also a key factor affecting the bleed air flow, which requires iterative calculation.

[0056] Hot side inlet conditions: coolant is 65# coolant; system cooling capacity required ≮3.6kw; hot side flow rate: 3L / min;

[0057] The hot edge outlet temperature is required to be ≤60℃;

[0058] Through the heat exchanger calculation software, it can be obtained that the basic volume of the heat exchanger core is approximately 130mmX90mmX100mm, and the specifications of the cold and hot side fins are determined. The weight is 1.2kg, which can meet the demand of cooling capacity ≮3.6kW.

[0059] Combination Figure 1 The installation space provided by the middle nacelle completes the basic structural design of the air-liquid heat exchanger 4. Figure 3 shown.

[0060] 2. After the basic structure of the air-liquid heat exchanger 4 is locked, the basic installation form of the air-liquid heat exchanger 4 in the nacelle is established, and then the remaining space is used to design the expansion liquid storage tank 1. The following points should be noted in the design of the expansion liquid storage tank 1:

[0061] The expansion tank 1 is mainly used as a reserve container for providing coolant to the system, taking into account the various postures of the pod in the flight envelope, to ensure that the air-to-liquid conversion system can always provide coolant to the electronic equipment and is not affected by the flight posture.

[0062] In addition to being a coolant storage container, the expansion tank 1 also needs to be integrated as much as possible into the system schematic diagram Figure 2 It has functions such as liquid supply / return (temperature sensor, pressure sensor) mounting seat, liquid supply / return / injection interface mounting seat, micro liquid pump 2 and filter (liquid filter 6) installation.

[0063] In addition to ensuring the above requirements, it is also necessary to store as much liquid as possible in a limited space. Through calculation, the effective available liquid capacity of the expandable liquid storage tank 1 is 0.85L. Within this capacity range, the amount of liquid added to the expandable liquid storage tank 1 needs to have a display function. Finally, the present invention adopts a pull-cord capacity display mechanism to meet this requirement. The structure of the expandable liquid storage tank 1 is shown in detail. Figure 4 .

[0064] 3. According to the requirements of the air-liquid conversion device, the micro liquid pump 2 selects a 24V DC motor driven liquid gear pump to meet the liquid supply flow rate: 3L / min, pump pressure rise 1Mpa. Power consumption is 100w. And the volume and weight of the micro liquid pump 2 are as small as possible. The micro liquid pump 2 is mainly composed of a DC brushless drive motor and a gear pump body. For details, see Figure 5 shown.

[0065] 4. Before the low-temperature coolant cooled by the air-liquid heat exchanger 4 is provided to the pod electronic system for cooling, the coolant fluid needs to be filtered to ensure that the fluid provided to the electronic system for cooling is clean. A dedicated liquid filter 6 is designed according to the system flow, working pressure, medium type, system interface, etc. The following points should be noted when designing the liquid filter 6:

[0066] The preliminary requirements for liquid filter 6 are as follows: filtration accuracy: 10μm, flow rate: 3L / min, working pressure ≤1Mpa, filtration flow resistance less than 150kpa, and the bypass valve, maintenance shut-off valve and pressure differential signaler need to be integrated in the liquid filter 6. See details Figure 6 shown.

[0067] 5. The above-mentioned expansion liquid storage tank 1, micro liquid pump 2, air-liquid heat exchanger 4 and liquid filter 6 are connected by pipes and screws, and the seals between the accessories are sealed by O-rings. A mounting base is designed between the air-liquid heat exchanger 4 and the expansion liquid storage tank 1 to ensure that the air-liquid heat exchanger 4 is securely installed on the expansion liquid storage tank 1. See details. Figure 7 , 8 , 9 and 10.

[0068] 6. In the pod air-liquid conversion device, supply / return liquid temperature and pressure sensors are arranged, and a differential pressure sensor is set on the filter (liquid filter 6). These sensors are mature products. For the collection of these data signals and host computer communication, it is necessary to design a data collection and host computer communication box (i.e., air-liquid conversion system data collection and host computer communication box 13). For specific components, see Fig.11 The box has the following functions:

[0069] With 2-way temperature and 2-way pressure measurement and solution functions;

[0070] Equipped with 1-channel pressure difference signal detection function;

[0071] Equipped with 1-way isolated CAN interface circuit to achieve communication with the upper system;

[0072] With power-on self-test function;

[0073] The design is specifically based on sensor selection, host computer communication protocol, power supply requirements, electrical interface, etc.

[0074] 7. In the pod air-liquid conversion device, the supply / return / injection port selects mature fluid connectors according to the system medium, flow, pressure, flow resistance and other indicators to solve the problems of quick disassembly and quick installation. See details Fig.12 .

[0075] like Figure 1 As shown: These are the installation constraints imposed by the aircraft electronic pod on this system. This system needs to be designed within the range where φA is the maximum outer diameter of the pod, φB is the maximum inner diameter of the pod, and length L is the maximum axial installation dimension.

[0076] like Figure 2 As shown: Combined with the technical requirements of the pod for the air-to-liquid conversion device, the composition and working principle of the device are formed, the components and accessories of the air-to-liquid conversion device are sorted out, and the functions, performance and other indicators of the air-to-liquid conversion device are decomposed into the components and accessories.

[0077] like Figure 3 As shown: After analyzing, selecting and calculating the functions and performance indicators of the air-to-liquid conversion device after decomposing it into the heat exchanger, an aluminum alloy plate-fin heat exchanger structure is adopted, and the structural design of the heat exchanger is carried out in combination with the pod installation interface, and finally the Figure 3 The air-liquid heat exchanger 4 in the embodiment includes a ram air inlet and outlet cover 4001, an air side sealing gasket 4002, a liquid side inlet and outlet cover 4003, a heat exchanger core assembly 4004 and a heat exchanger air side flange 4005. The cold side inlet and cold side outlet of the heat exchanger core assembly 4004 are respectively connected to the air inlet 1601 and the exhaust port 1602 through the ram air inlet and outlet cover 4001, and the hot side inlet and hot side outlet of the heat exchanger core assembly 4004 are respectively connected to the micro liquid pump 2 and the liquid filter 6 through the liquid side inlet and outlet cover 4003. The ram air inlet and outlet cover 4001 is made of carbon fiber composite material, connected to the heat exchanger air side flange 4005 by screws, and sandwiched with an air side sealing gasket 4002, which isolates the air entering the heat exchanger cavity from the pod to prevent the air with moisture from entering the pod and affecting the operation of other electronic devices.

[0078] like Figure 4As shown: after the structure of the air-liquid heat exchanger 4 is basically locked, the remaining space in the nacelle is used to carry out the structural design of the expansion liquid storage tank 1. The expansion type liquid storage tank 1 includes an expansion tank shell 1001 with a liquid level gauge, an expansion tank end cover 1002 is installed at one end of the expansion tank shell 1001, a rope mounting seat 1003 is installed on the outer surface of the expansion tank end cover 1002, a dust cover 1004 is installed on the outer side of the rope mounting seat 1003, a rope pulley 1005 is arranged between the rope mounting seat 1003 and the dust cover 1004, an expansion spring 1007 and an expansion piston 1008 are arranged in the inner cavity of the expansion tank shell 1001, one end of the expansion spring 1007 is close to the expansion piston 1008, and the other end is close to the expansion tank end cover 1002, one end of the liquid level rope 1006 is connected to the expansion piston 1008, and the other end extends into the liquid level gauge through the rope pulley 1005 and is connected to the liquid level gauge display plug 1010, and a liquid level gauge compression spring 1009 is designed in the liquid level gauge to cooperate with the liquid level gauge display plug 1010. In order to ensure that the pod can supply liquid in various postures within the flight envelope, the available liquid must be immersed in the pump suction port to ensure that the micro liquid pump 2 can always suck liquid when in operation. Therefore, the expansion piston 1008 plus the expansion spring 1007 are used to press the liquid in the tank into the pump suction port. Through the maximum structural design, the inner diameter of the expansion liquid storage tank 1 is φ85mm, and the axial sliding distance of the expansion piston 1008 is 150.5mm. Finally, the effective liquid volume of the expansion liquid storage tank 1 is determined to be 0.85L. Figure 2 In the system block diagram, components of the device such as the liquid supply / return port, the liquid filter 6, the micro liquid pump 2, and the mounting structure of the air-liquid heat exchanger 4 are all integrated on the expansion type liquid storage tank 1.

[0079] like Figure 5 As shown, a micro liquid pump 2 is mainly composed of a DC brushless motor 2001 and a gear pump head 2002. Figure 2 According to the decomposition index requirements of the functional block diagram, select mature pump products that meet the requirements of the device's liquid supply pressure, flow rate, power consumption and other indicators.

[0080] like Figure 6As shown, for the coolant that has been cooled, it is necessary to filter the coolant before providing it to the pod electronic system for use to ensure that the coolant does not contaminate other accessories in the electronic system. Therefore, a liquid filter 6 is designed, and the liquid filter 6 includes a liquid filter seat 6002. The liquid filter seat 6002 is provided with a liquid inlet and a liquid outlet. A liquid filter pressure difference signal device 6001 is installed at one end of the liquid filter seat 6002, and a liquid filter housing 6003 is installed at the other end of the liquid filter seat 6002. A liquid filter element assembly 6006 is installed in the inner cavity of the liquid filter housing 6003. One end of the liquid filter element assembly 6006 is a liquid filter bypass valve 6005. A liquid filter maintenance valve 6007 and a liquid filter maintenance valve spring 6008 are provided in the liquid filter seat 6002 and between the liquid outlet and the liquid filter element assembly 6006. The liquid filter element assembly 6006 is a key component of the liquid filter 6, and adopts a stainless steel wire mesh pleated filter structure. After the component is installed in the liquid filter 6, the liquid filter maintenance valve 6007 will be pressed down to connect the liquid outlet with the inside of the liquid filter 6, and the inlet liquid will pass through the liquid filter element assembly 6006 from the inside to the outside ( Figure 6 The liquid is filtered along the direction of the arrow in the middle, and pollutants remain inside the filter element of the liquid filter element assembly 6006. The clean liquid after filtration flows out of the liquid filter 6 through the liquid filter maintenance valve 6007 channel. When the content capacity of the filter element reaches a certain level, the pressure difference between the front and rear of the liquid filter element assembly 6006 will increase. When the alarm threshold of the liquid filter pressure difference signal device 6001 is reached, an alarm signal is output. Remind to maintain the liquid filter element assembly 6006. After disassembling the liquid filter element assembly 6006, the liquid filter maintenance valve 6007 slides axially under the elastic force of the liquid filter maintenance valve spring 6008 to block the liquid outlet, preventing the liquid in the air-to-liquid conversion device pipeline from flowing out and polluting the pod environment.

[0081] like Figures 7-10 As shown, the system pipelines and mounting brackets for connecting the various accessories of the present invention are shown. The flange structures in the pump diffuser assembly 3, diffuser filter assembly 5 and filter outlet assembly 7 are designed as uniformly as possible to avoid the types of parts and reduce the types of sealing rings. Figure 7 In the embodiment, the pump bulk pipe assembly 3 includes a pump connecting flange 3001 , a pump bulk pipe 3002 and a bulk connecting flange 3003 . Figure 8 In the embodiment, the bulk filter tube assembly 5 includes a bulk connection flange 3003, a bulk filter tube 5001 and a filter connection flange 5002. Fig. 9 In the figure, the filter outlet pipe assembly 7 includes a filter connection flange 5002 and a filtrate pipe 7001.

[0082] like Fig.11, is a basic functional block diagram of a data acquisition and host computer communication box (air-liquid conversion system data acquisition and host computer communication box 13), which consists of a pressure sensor 10, a temperature sensor 9, a liquid filter pressure difference signal device 6001, a control box, and software solidified in the control box.

[0083] The power supply circuit is used to convert the input +12VDC into a +5VDC power supply voltage to power the microcontroller box CAN transceiver and other components. The rectifier diode IN4001 is used in the power supply circuit design to implement the reverse connection protection design. In terms of EMI design, the LC filter circuit composed of inductors and capacitors can effectively filter out interference on the power line and reduce electromagnetic interference caused by conduction.

[0084] The pressure sensor uses an output type pressure sensor 10, (the voltage signal of 0.5~4.5V is converted into a digital quantity by the A / D converter on the box microcontroller, and then calculated into a pressure value by the microcontroller;

[0085] The temperature sensor uses a PT1000 platinum resistance temperature sensor 9. The box platinum resistance conditioning circuit is used to condition the resistance signal of the external PT1000 temperature sensor into a voltage signal, which is converted into a digital signal by the A / D converter on the single-chip microcomputer and is resolved into a temperature value by the single-chip microcomputer;

[0086] The liquid filter pressure difference signal device 6001 is used to sense the internal and external pressures of the liquid filter 6. When the internal and external pressure difference of the liquid filter 6 reaches a certain value, an alarm signal is output (the +5V voltage signal is sent to the I / O pin of the microcontroller).

[0087] The pressure value signal, temperature value signal and differential pressure signal are checked in the single chip microcomputer. Finally, according to the communication protocol requirements, the pressure value data, temperature value data, status information, version information, etc. are packaged and sent to the host computer through the CAN bus.

[0088] Fig.12 It is a mature fluid connector selected according to the system fluid medium, flow rate, flow resistance, working pressure and other indicators in the present invention, including the supply / return fluid connector 17 and the injection fluid connector 18, both of which are installed in the pod air-liquid conversion device circuit, and play the function of supplying liquid and returning liquid to the outside of the system and filling liquid in the pod air-liquid conversion device itself.

[0089] The supply / return fluid connector 17 adopts a TSA5 socket, and the injection fluid connector 18 adopts a TSA3 socket.

[0090] Fig.13This is a stereoscopic diagram of the pod air-to-liquid conversion device assembly finally delivered by the present invention. During the flight of the aircraft, the flight Mach number is 0.5-0.8, the flight altitude is 5000-8000m, and a certain flow of low-temperature air is introduced through the ram air bleed port 1601 on the cabin structure 16. The coldness of the low-temperature air is extracted through the pod air-to-liquid conversion device to cool the pod mission system. The pod air-to-liquid conversion device has a maximum diameter of φA (excluding the bleed cat ears of the cabin structure 16), an effective axial length of L, and a cooling capacity of 3.6kW. Under severe conditions, the cooling liquid temperature provided to the pod mission system is ≤60℃, the liquid supply flow rate is 3L / min, the liquid supply pressure is 0.6Mpa, and the abnormal situation is 1Mpa.

[0091] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A nacelle air-liquid conversion device, characterized in that: The pod air-liquid conversion device is installed in an external pod of an aircraft with a flight Mach number of 0.5 to 0.8 and a flight altitude of 5000 to 8000 m in a built-in manner, and comprises a pod structure (16) with an air inlet (1601) and an exhaust port (1602), and the pod structure (16) is provided with: An air-liquid heat exchanger (4), wherein the cold side inlet of the air-liquid heat exchanger (4) is connected to the air inlet (1601), and the cold side outlet of the air-liquid heat exchanger (4) is connected to the external environment of the aircraft through the exhaust port (1602); A liquid filter (6), wherein the inlet of the liquid filter (6) is connected to the hot side outlet of the air-liquid heat exchanger (4), the outlet of the liquid filter (6) is connected to the liquid path outlet (8) of the air-liquid conversion system, and a pressure sensor and a temperature sensor are also provided between the outlet of the liquid filter (6) and the liquid path outlet (8) of the air-liquid conversion system; An expansion type liquid storage tank (1), wherein the inlet of the expansion type liquid storage tank (1) is connected to the liquid path inlet (11) of the air-liquid conversion system, a pressure sensor and a temperature sensor are provided between the inlet of the expansion type liquid storage tank (1) and the liquid path inlet (11) of the air-liquid conversion system, and the expansion type liquid storage tank (1) is also provided with a liquid injection port (12) of the air-liquid conversion system; A micro liquid pump (2), the micro liquid pump (2) being arranged between the outlet of the expansion liquid storage tank (1) and the hot side inlet of the air-liquid heat exchanger (4); The air-liquid conversion system data acquisition and host computer communication box (13) is respectively connected to the pressure sensor, the temperature sensor and the host computer.

2. A pod air-liquid conversion device according to claim 1, characterized in that: The cabin structure (16) is cylindrical, and the air inlet (1601) and the air outlet (1602) on the cabin structure (16) are respectively connected to the cold side inlet and the cold side outlet of the air-liquid heat exchanger (4) through the ram air interface hose (14) and the clamp (15).

3. A pod air-liquid conversion device according to claim 1, characterized in that: The air-liquid heat exchanger (4) is one of a shell and tube heat exchanger, a plate-fin heat exchanger or a tube-fin heat exchanger. The air-liquid heat exchanger (4) comprises a ram air inlet and outlet cover (4001), a heat exchanger core assembly (4004) and a liquid side inlet and outlet cover (4003). The cold side inlet and the cold side outlet of the heat exchanger core assembly (4004) are respectively connected to the air inlet (1601) and the exhaust port (1602) through the ram air inlet and outlet cover (4001), and the hot side inlet and the hot side outlet of the heat exchanger core assembly (4004) are respectively connected to the micro liquid pump (2) and the liquid filter (6) through the liquid side inlet and outlet cover (4003).

4. A pod air-liquid conversion device according to claim 1, characterized in that: The expansion type liquid storage tank (1) is integrated with a pressure sensor mounting seat, a temperature sensor mounting seat, an air-liquid conversion system liquid path outlet mounting seat, an air-liquid conversion system liquid path inlet mounting seat, an air-liquid conversion system liquid injection port mounting seat, a micro liquid pump mounting seat and a liquid filter mounting seat.

5. The nacelle air-liquid conversion device according to claim 1, characterized in that: The micro liquid pump (2) is a liquid gear pump driven by a brushless DC motor.

6. A pod air-liquid conversion device according to claim 1, characterized in that: The expansion type liquid storage tank (1) is a rope-drawing type liquid storage tank, comprising an expansion tank shell (1001) with a liquid level gauge, an expansion tank end cover (1002) being installed at one end of the expansion tank shell (1001), a rope-drawing mounting seat (1003) being installed on the outer surface of the expansion tank end cover (1002), a dust cover (1004) being installed on the outer side of the rope-drawing mounting seat (1003), and a rope-drawing pulley (1003) being arranged between the rope-drawing mounting seat (1003) and the dust cover (1004). 1005), an expansion spring (1007) and an expansion piston (1008) are arranged in the inner cavity of the expansion box shell (1001), one end of the expansion spring (1007) is in close contact with the expansion piston (1008), and the other end is in close contact with the expansion box end cover (1002), one end of the liquid level pull rope (1006) is connected to the expansion piston (1008), and the other end extends to the liquid level meter through the pull rope pulley (1005) and is connected to the liquid level meter display plug (1010).

7. The nacelle air-liquid conversion device according to claim 1, characterized in that: The air-liquid heat exchanger (4) and the micro liquid pump (2) are connected via a pump diffuser assembly (3); The air-liquid heat exchanger (4) and the liquid filter (6) are connected via a filter tube assembly (5); The liquid filter (6) and the liquid outlet (8) of the air-liquid conversion system are connected via a filter outlet pipe assembly (7); The pump diffuser pipe assembly (3), the diffuser filter pipe assembly (5) and the filter outlet pipe assembly (7) are all pipe fittings with flange structures at both ends.

8. The nacelle air-liquid conversion device according to claim 1, characterized in that: The liquid filter (6) comprises a liquid filter seat (6002), the liquid filter seat (6002) is provided with a liquid inlet and a liquid outlet, a liquid filter pressure difference signal device (6001) is installed at one end of the liquid filter seat (6002), a liquid filter housing (6003) is installed at the other end of the liquid filter seat (6002), a liquid filter element assembly (6006) is installed in the inner cavity of the liquid filter housing (6003), one end of the liquid filter element assembly (6006) is a liquid filter bypass valve (6005), and a liquid filter maintenance valve (6007) and a liquid filter maintenance valve spring (6008) are arranged in the liquid filter seat (6002) and between the liquid outlet and the liquid filter element assembly (6006).

9. The nacelle air-liquid conversion device according to claim 1, characterized in that: The air-liquid conversion system liquid path outlet (8), the air-liquid conversion system liquid path inlet (11) and the air-liquid conversion system liquid injection port (12) are fluid connectors.

10. The nacelle air-liquid conversion device according to claim 1, characterized in that: The air-liquid conversion system data acquisition and host computer communication box (13) comprises a CAN interface circuit and is connected to the host computer via a CAN bus.

Images