Airborne pod environment control system

Abstract

The utility model discloses an airborne pod environment control system, and relates to the technical field of airborne pod environment control systems. The device comprises a liquid supply assembly, the liquid supply assembly comprises a self-pressurization oil tank and a shielding type motor pump, and the self-pressurization oil tank comprises a front end cover, a small shell, a large shell and a rear end cover; a small piston is arranged in the small shell, a large piston is arranged in the large shell, and the small piston and the large piston are connected through a piston rod; the shielding type motor pump comprises a motor shell, a pump shell, a pump, a motor rotor assembly and a motor stator assembly. A shielding sleeve is arranged between the motor rotor assembly and the motor stator assembly. The problems of heat dissipation, leakage and the like caused by cavitation, pressure fluctuation and pump flow reduction can be avoided, the filling efficiency of cooling liquid is improved, and a system is guaranteed to be easy to maintain; and meanwhile, the purposes of self-pressurization, reliable sealing and controllable temperature can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of airborne pod environmental control systems, and more specifically to an airborne pod environmental control system. Background Art

[0002] The shortcomings of existing airborne pod environmental control systems are as follows:

[0003] 1) The purpose of existing airborne pod environmental control systems is usually to cool and dissipate heat for high-power electronic equipment, and its function is a single refrigeration function. With the rapid development of optoelectronic pods, the single refrigeration function often cannot meet the accuracy requirements of optical equipment. When the temperature is too high or too low, the accuracy of optical equipment is usually greatly reduced, which will affect the tactical performance of the optoelectronic pod and the mission completion of the fighter.

[0004] 2) Most of the existing airborne pod environmental control systems are closed systems that use spring-loaded pressurized oil tanks to store liquid. In order to meet the expansion requirements of the coolant in the tank at high temperatures, the pressurized spring needs to reserve a certain amount of compression to ensure that the coolant has enough expansion space; at this time, the pressurized spring often occupies a large space and weight; at the same time, when the aircraft is flying at high altitudes, the external air pressure decreases, which will cause insufficient pressurization pressure in the tank, affecting the oil suction of the pump, leading to cavitation, pressure fluctuations, and reduced pump flow affecting heat dissipation.

[0005] 3) The existing airborne pod environmental control system usually uses a rotary seal (dynamic and static ring seal or metal skeleton oil seal) to seal between the pump and the motor. After working for a period of time, this sealing method will inevitably cause coolant leakage, pollution and corrosion, and may even cause other electronic equipment to contact the coolant, resulting in insulation degradation or short circuit, causing the electronic equipment to fail.

[0006] 4) The airborne pod environmental control system is usually a closed system. In order to reduce the impact of air on the system, the existing technology generally evacuates the system first and then fills the coolant. The ground support equipment is relatively complex and it takes a long time to complete the filling of the coolant. The efficiency of filling the coolant is low and the support and maintenance are complicated.

[0007] In summary, the existing airborne pod environmental control system has a single function, is large in size and weight, and also has problems such as cavitation, pressure fluctuations, reduced pump flow affecting heat dissipation, and leakage. The efficiency of refilling coolant is low and maintenance is complex.

[0008] Therefore, it is necessary to develop an airborne pod environmental control system that is small in size, light in weight, has high efficiency in cooling liquid filling, is simple to maintain, can achieve self-pressurization, has reliable sealing, and can achieve temperature control. Summary of the invention

[0009] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide an airborne pod environmental control system.

[0010] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: an airborne pod environmental control system, characterized in that: it includes a liquid supply component, the liquid supply component includes a self-pressurizing oil tank and a shielded motor pump, the self-pressurizing oil tank includes a front end cover, a small shell, a large shell and a rear end cover connected in sequence;

[0011] A small piston is arranged in the small shell, and a large piston is arranged in the large shell. The small piston and the large piston are connected by a piston rod. A first low-pressure chamber A is formed between the side of the small shell close to the front end cover and the small piston, a high-pressure chamber B is formed between the side of the small shell away from the front end cover and the small piston, a second low-pressure chamber C is formed between the side of the large shell close to the front end cover and the large piston, and an expandable space D is formed between the side of the large shell close to the rear end cover and the large piston.

[0012] The shielded motor pump includes a motor housing installed on the front end cover, a pump housing connected to the motor housing, a pump located in the pump housing, a motor rotor assembly connected to the pump main shaft and located in the motor housing, and a motor stator assembly matching the motor rotor assembly; a shielding sleeve is arranged between the motor rotor assembly and the motor stator assembly, the pump outlet is connected to the high-pressure chamber B, and the first low-pressure chamber A and the second low-pressure chamber C are connected to the oil suction port of the pump.

[0013] In the above technical solution, a pressure sensor and a temperature sensor are installed on the pump; heaters are installed on the outside of the small shell located on the first low-pressure chamber A and the outside of the large shell located on the second low-pressure chamber C.

[0014] In the above technical solution, the heater is fixed by a heat-insulating shell.

[0015] In the above technical solution, a pollution alarm sensor is provided on the small housing, a liquid level sensor is installed on the rear end cover, and the motor housing is connected to a controller.

[0016] In the above technical solution, an exhaust valve is arranged on the top of the small shell; and the pump outlet is connected to the high-pressure chamber B through a high-pressure pipe.

[0017] In the above technical solution, it also includes an air-liquid heat exchanger, a solenoid valve and a cold plate;

[0018] The solenoid valve is installed on the air-liquid heat exchanger, the coolant inlet of the air-liquid heat exchanger is connected to the first interface of the solenoid valve, and the coolant outlet of the air-liquid heat exchanger and the second interface of the solenoid valve are both connected to the liquid return port of the liquid supply component;

[0019] The oil outlet of the pump is connected to the cold plate coolant inlet, and the cold plate coolant outlet is connected to the third interface of the solenoid valve.

[0020] In the above technical solution, the motor rotor assembly and the pump main shaft are connected by a flat key; the motor housing and the pump housing are sealed by an O-ring.

[0021] Compared with the prior art, the utility model has the following advantages.

[0022] 1) The utility model can avoid cavitation, pressure fluctuation, reduced pump flow affecting heat dissipation, leakage and other problems, improve the efficiency of coolant filling, and simplify system maintenance; at the same time, it can achieve the purpose of self-pressurization, reliable sealing and controllable temperature.

[0023] 2) The utility model provides circulating coolant for the system through a shielded motor pump, and utilizes the ram air provided by the carrier to exchange heat with the air-liquid heat exchanger to cool down the electronic equipment.

[0024] 3) When the temperature is lower than the set value, the utility model uses the solenoid valve to adjust so that the coolant flow through the air-liquid heat exchanger is reduced, or the oil circuit is cut off so that the coolant no longer flows through the air-liquid heat exchanger, and the oil tank is heated at the same time, so as to achieve the purpose of temperature control and ensure the ambient temperature requirements for the operation of electronic equipment.

[0025] 4) The utility model installs sensors such as temperature, pressure, liquid level, pollution alarm, etc. in the system to monitor the working status of the system in real time.

[0026] 5) The utility model realizes the pressurization of the motor pump inlet through the self-pressurizing oil tank, which not only provides space for the coolant to expand at high temperature, but also is not affected by the low air pressure at high altitude, thus avoiding the problems of insufficient tank pressurization pressure, cavitation, pressure fluctuation, reduced pump flow affecting heat dissipation when the aircraft is flying at high altitude; at the same time, it also reduces the size and weight of the system.

[0027] 6) The utility model adopts a shielded motor pump, which eliminates the rotary seal between the motor rotor assembly and the pump main shaft, avoiding problems such as pollution, corrosion, and electronic equipment failure caused by leakage.

[0028] 7) The utility model dissipates heat from the coolant through an air-liquid heat exchanger and heats the coolant through a heater. The function is no longer a single refrigeration function, and the purpose of controllable system temperature is achieved.

[0029] 8) The utility model does not need to be vacuumed before adding coolant, thereby reducing the complexity of ground support equipment, shortening the time for adding coolant, and ensuring good system maintainability and high efficiency in adding coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model.

[0031] Figure 2 It is a structural schematic diagram of the liquid supply component.

[0032] Figure 3 A cross-sectional view of the liquid supply assembly.

[0033] Figure 4 It is a schematic diagram of the structure of a canned motor pump.

[0034] Figure 5 This is a system diagram of the utility model.

[0035] Among them, 1-liquid supply assembly, 11-self-pressurized oil tank, 111-front end cover, 112-small shell, 113-large shell, 114-rear end cover, 115-small piston, 116-large piston, 117-piston rod, 12-shielded motor pump, 121-motor housing, 122-pump housing, 1221-pump, 123-motor rotor assembly, 124-motor stator assembly, 125-shielding sleeve, 126-pressure sensor, 127-temperature sensor, 13-heater, 131-insulation shell, 14-pollution alarm sensor, 15-liquid level sensor, 16-controller, 17-exhaust valve, 18-high-pressure pipe, 2-air-liquid heat exchanger, 3-solenoid valve, 31-first interface, 32-second interface, 33-third interface, 4-cold plate, A-first low-pressure chamber, B-high-pressure chamber, C-second low-pressure chamber, D-expandable space. DETAILED DESCRIPTION

[0036] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0037] Referring to the attached drawings, it can be seen that: an airborne pod environmental control system is characterized by comprising a liquid supply component 1, the liquid supply component 1 comprising a self-pressurizing oil tank 11 and a shielded motor pump 12, the self-pressurizing oil tank 11 comprising a front end cover 111, a small shell 112, a large shell 113 and a rear end cover 114 connected in sequence;

[0038] A small piston 115 is arranged in the small shell 112, and a large piston 116 is arranged in the large shell 113. The small piston 115 and the large piston 116 are connected by a piston rod 117. A first low-pressure chamber A is formed between the side of the small shell 112 close to the front end cover 111 and the small piston 115, a high-pressure chamber B is formed between the side of the small shell 112 away from the front end cover 111 and the small piston 115, a second low-pressure chamber C is formed between the side of the large shell 113 close to the front end cover 111 and the large piston 116, and an expandable space D is formed between the side of the large shell 113 close to the rear end cover 114 and the large piston 116.

[0039] The shielded motor pump 12 includes a motor housing 121 installed on the front end cover 111, a pump housing 122 connected to the motor housing 121, a pump 1221 located in the pump housing 122, a motor rotor assembly 123 connected to the main shaft of the pump 1221 and located in the motor housing 121, and a motor stator assembly 124 matching the motor rotor assembly 123; a shielding sleeve 125 is arranged between the motor rotor assembly 123 and the motor stator assembly 124, the outlet of the pump 1221 is connected to the high-pressure chamber B, and the first low-pressure chamber A and the second low-pressure chamber C are connected to the oil suction port of the pump 1221.

[0040] The pump 1221 is installed with a pressure sensor 126 and a temperature sensor 127; a heater 13 is installed on the outside of the small shell 112 located on the first low-pressure chamber A and on the outside of the large shell 113 located on the second low-pressure chamber C.

[0041] The heater 13 is fixed by a heat-insulating shell 131 .

[0042] The small housing 112 is integrated with a pollution alarm sensor 14, which can output a pollution alarm signal when the coolant in the system is contaminated; the rear end cover 114 is installed with a liquid level sensor 15, which can monitor the liquid level changes of the system in real time; the motor housing 121 is connected to the controller 16;

[0043] An exhaust valve 17 is provided at the top of the small shell 112, and its function is to discharge the air in the system when the coolant is added. Since the air density is much lower than the coolant density, installing it at the top is conducive to the discharge of the system air; the outlet of the pump 1221 is connected to the high-pressure chamber B through the high-pressure pipe 18.

[0044] It also includes an air-liquid heat exchanger 2, a solenoid valve 3 and a cold plate 4;

[0045] The solenoid valve 3 is installed on the air-liquid heat exchanger 2, the coolant inlet of the air-liquid heat exchanger 2 is connected to the first interface 31 of the solenoid valve 3, and the coolant outlet of the air-liquid heat exchanger 2 and the second interface 32 of the solenoid valve 3 are both connected to the liquid return port of the liquid supply component 1;

[0046] The oil outlet of the pump 1221 is connected to the coolant inlet of the cold plate 4 , and the coolant outlet of the cold plate 4 is connected to the third interface 33 of the solenoid valve 3 .

[0047] The motor rotor assembly 123 and the main shaft of the pump 1221 are connected by a flat key to transmit the rotation speed and torque; the motor housing 121 and the pump housing 122 are sealed by an O-ring.

[0048] In actual use, the high-pressure chamber B introduces pressure from the outlet of the pump 1221 through the high-pressure pipe 18, and the first low-pressure chamber A and the second low-pressure chamber C are pressurized through the difference in cooling liquid action area between the first low-pressure chamber A and the second low-pressure chamber C and the high-pressure chamber B; when the coolant in the system expands due to heat, the expandable space D provides it with expandable space.

[0049] The shielding sleeve 125 is used to isolate the motor stator assembly 124 to prevent the motor stator assembly 124 from contacting the coolant and causing a short circuit; by reasonably designing the air gap between the motor stator assembly 124 and the motor rotor assembly 123 and the thickness of the shielding sleeve 125, the processing accuracy of the parts is improved, so that the motor can still have a higher efficiency.

[0050] The pump 1221 is equipped with an oil outlet connector, a pressure sensor 126 and a temperature sensor 127. The pressure sensor 126 and the temperature sensor 127 can monitor the changes in the outlet pressure and temperature of the pump 1221 in real time. The controller 16 is used to control the operation of the motor, and at the same time, it summarizes the pressure, temperature, liquid level and pollution alarm signals, and outputs them to the upper system through the signal electrical connector.

[0051] When the system temperature detected by the temperature sensor 127 is too low, the heater 13 starts to work, heats the coolant in the first low-pressure chamber A and the second low-pressure chamber C, and circulates it to the cold plate 4 through the shielded motor pump 12, ensuring that the ambient temperature of the electronic equipment is maintained within a certain range; when the heater 13 is working, the thermal insulation shell 131 can reduce heat loss and improve heating efficiency.

[0052] The coolant exchanges heat with the electronic equipment through the cold plate 4, and circulates to the air-liquid heat exchanger 2 through the shielded motor pump 12; the air-liquid heat exchanger 2 uses the ram air of the carrier to exchange heat with the coolant inside the air-liquid heat exchanger 2 to ensure that the ambient temperature of the electronic equipment is maintained within a certain range.

[0053] The solenoid valve 3 is used to control the liquid flow through the air-liquid heat exchanger 2; when the system temperature is higher than a certain set value, the coolant flow through the air-liquid heat exchanger 2 increases, and the temperature is reduced through the air-liquid heat exchanger 2; when the system temperature is lower than a certain set value, the coolant flow through the air-liquid heat exchanger 2 decreases until the flow is zero, and at the same time the heater 13 starts to work to heat the system.

[0054] The utility model adopts self-pressurizing oil tank technology: by introducing the outlet pressure of the pump 1221 into the high-pressure chamber B, the difference in cooling liquid action area between the high-pressure chamber B and the first low-pressure chamber A and the second low-pressure chamber C is utilized to realize the self-pressurizing function of the oil tank.

[0055] The utility model adopts a shielded motor pump 12: a shielding sleeve 125 is installed between a motor stator assembly 124 and a motor rotor assembly 123, so that the motor stator assembly 124 is isolated from the coolant to achieve zero leakage.

[0056] The utility model adopts an air-liquid heat exchanger 2 for heat dissipation, adjusts the flow of coolant entering the air-liquid heat exchanger 2 by a solenoid valve 3, and heats the coolant by a heater 13, thereby realizing the temperature controllable function of the environmental control system.

[0057] The coolant used in the existing airborne pod environmental control system is generally No. 65 coolant (in compliance with GJB 6100-2007 or GJB 6100A-2021), which is conductive and corrosive. The existing technical solution usually uses a rotary seal to separate the coolant in the motor and the pump. After working for a period of time, the rotary seal will inevitably leak.

[0058] After adopting the utility model, the shielding sleeve 125 of the utility model separates the motor stator assembly 124 from the coolant, there is no rotating seal between the motor and the pump 1221, and a static seal is used between the motor housing 121 and the pump housing 122, thereby achieving the goal of zero leakage.

[0059] Other parts not described belong to the prior art.

Claims

1. An airborne pod environmental control system, characterized in that: The invention comprises a liquid supply assembly (1), wherein the liquid supply assembly (1) comprises a self-pressurizing oil tank (11) and a shielded motor pump (12), wherein the self-pressurizing oil tank (11) comprises a front end cover (111), a small shell (112), a large shell (113) and a rear end cover (114) which are connected in sequence; A small piston (115) is arranged in the small housing (112), and a large piston (116) is arranged in the large housing (113). The small piston (115) and the large piston (116) are connected via a piston rod (117). A first low-pressure chamber (A) is formed between the side of the small housing (112) close to the front end cover (111) and the small piston (115), a high-pressure chamber (B) is formed between the side of the small housing (112) away from the front end cover (111) and the small piston (115), a second low-pressure chamber (C) is formed between the side of the large housing (113) close to the front end cover (111) and the large piston (116), and an expandable space (D) is formed between the side of the large housing (113) close to the rear end cover (114) and the large piston (116); The shielded motor pump (12) comprises a motor housing (121) mounted on a front end cover (111), a pump housing (122) connected to the motor housing (121), a pump (1221) located in the pump housing (122), a motor rotor assembly (123) connected to the main shaft of the pump (1221) and located in the motor housing (121), and a motor stator assembly (124) matched with the motor rotor assembly (123); a shielding sleeve (125) is provided between the motor rotor assembly (123) and the motor stator assembly (124); the outlet of the pump (1221) is connected to the high-pressure chamber (B), and the first low-pressure chamber (A) and the second low-pressure chamber (C) are connected to the oil suction port of the pump (1221).

2. An airborne pod environmental control system according to claim 1, characterized in that: The pump (1221) is installed with a pressure sensor (126) and a temperature sensor (127); a heater (13) is installed on the outside of the small shell (112) located on the first low-pressure chamber (A) and on the outside of the large shell (113) located on the second low-pressure chamber (C).

3. An airborne pod environmental control system according to claim 2, characterized in that: The heater (13) is fixed by a heat-insulating shell (131).

4. The airborne pod environmental control system according to claim 2, characterized in that: The small housing (112) is provided with a pollution alarm sensor (14), the rear end cover (114) is installed with a liquid level sensor (15), and the motor housing (121) is connected to a controller (16).

5. The airborne pod environmental control system according to claim 1, characterized in that: An exhaust valve (17) is provided at the top of the small housing (112); the outlet of the pump (1221) is connected to the high-pressure chamber (B) via a high-pressure pipe (18).

6. The airborne pod environmental control system according to claim 4, characterized in that: It also includes an air-liquid heat exchanger (2), a solenoid valve (3) and a cold plate (4); The solenoid valve (3) is installed on the air-liquid heat exchanger (2), the coolant inlet of the air-liquid heat exchanger (2) is connected to the first interface (31) of the solenoid valve (3), and the coolant outlet of the air-liquid heat exchanger (2) and the second interface (32) of the solenoid valve (3) are both connected to the liquid return port of the liquid supply component (1); The oil outlet of the pump (1221) is connected to the cooling liquid inlet of the cold plate (4), and the cooling liquid outlet of the cold plate (4) is connected to the third interface (33) of the solenoid valve (3).

7. The airborne pod environmental control system according to claim 1, characterized in that: The motor rotor assembly (123) and the main shaft of the pump (1221) are connected by a flat key; and the motor housing (121) and the pump housing (122) are sealed by an O-ring.

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