A twin-engine aircraft engine oil sealing device

Abstract

This invention proposes a novel oil sealing device for twin-engine aircraft engines, relating to the field of aviation ground protection equipment technology. The first oil sealing system includes an oil tank, a motor-pump assembly, a check valve, and a solenoid valve. A heater is installed inside the oil tank. The oil tank, motor-pump assembly, and solenoid valve are connected sequentially along the oil flow direction via oil sealing pipelines. The check valve is connected in parallel with the motor-pump assembly via the oil sealing pipelines. The end of the oil sealing pipeline is connected to the self-circulation interface of a self-circulation pipeline unit, which is connected to the oil tank via a self-circulation pipeline. The pneumatic oil sealing system includes a gas source pipeline, on which an air inlet, a gas source switch, a pressure regulating valve, and a pneumatic oil sealing switch are sequentially arranged along the gas flow direction. A nitrogen cylinder is connected externally to the air inlet. The second oil sealing system has the same structure as the first oil sealing system, and both the first and second oil sealing systems are connected to the pneumatic oil sealing system. This invention employs a dual oil sealing system, integrating heating and oil sealing, and can use different oil media.

Description

Technical Field

[0001] This invention relates to the field of aviation ground protection equipment technology, and more specifically, to a novel oil sealing device for twin-engine aircraft engines. Background Technology

[0002] Most existing aircraft engine oil sealing devices are designed for single engines, using a single oil medium and employing a single sealing method (pneumatic or electric). However, some aircraft engines consist of a main engine and a secondary engine, with different oils used for the two engines' oil seals. The hydraulic system for the oil seals uses two different oil media, so a single sealing method cannot meet the needs of dual engines. Furthermore, it requires manual operation and is complex.

[0003] Most oil sealing equipment on the market separates oil heating and oil sealing into two separate devices. In operation, the oil is first heated to the designated oil sealing temperature using the heating device, then injected into the oil sealing device, which in turn injects the oil into the aircraft engine requiring oil sealing. Existing equipment is complex to operate, and all processes are manually controlled, resulting in numerous drawbacks:

[0004] 1. Manual or semi-automatic equipment requires highly skilled operators and is prone to misoperation.

[0005] 2. The oil seal fluid is a single oil medium.

[0006] 3. Use a single oil seal (pneumatic or electric).

[0007] 4. Heating and oil sealing are two separate devices, making their operation relatively complex.

[0008] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a new type of twin-engine aircraft engine oil sealing device that can solve the problems mentioned in the background art. Summary of the Invention

[0009] The purpose of this invention is to provide a novel oil sealing device for twin-engine aircraft, which addresses the shortcomings of existing technologies by providing a solution. This oil sealing device is a dual-system oil sealing device that integrates heating and oil sealing, and has a higher degree of automation.

[0010] Embodiments of the present invention provide a novel oil sealing device for a twin-engine aircraft engine, comprising a first oil sealing system, a second oil sealing system, and a pneumatic oil sealing system;

[0011] The first oil seal system includes an electric oil seal pipeline unit and a self-circulation pipeline unit. The electric oil seal pipeline unit includes an oil tank, a motor pump set, a check valve, and a solenoid valve. The oil tank is equipped with a heater, which is connected to a PLC controller. The oil tank, the motor pump set, and the solenoid valve are connected sequentially along the oil flow direction through the oil seal pipeline. The check valve is connected in parallel with the motor pump set through the oil seal pipeline. The end of the oil seal pipeline is connected to the self-circulation interface of the self-circulation pipeline unit through an oil outlet. The self-circulation pipeline unit is connected to the oil tank through a self-circulation pipeline. A third filter is installed on the self-circulation pipeline, and the third filter is connected to the oil tank.

[0012] The pneumatic oil seal system includes a gas source pipeline connected to the oil tank. The gas source pipeline is provided with an air inlet, a gas source switch, a pressure regulating valve and a pneumatic oil seal switch in sequence along the gas flow direction. The air inlet is connected to a nitrogen cylinder.

[0013] The second oil seal system has the same structure as the first oil seal system, and both the first oil seal system and the second oil seal system are connected to the pneumatic oil seal system.

[0014] In some embodiments of the present invention, the pneumatic oil seal system further includes a spare gas cylinder, a pressure gauge, a pressure relief valve, a pressure relief switch, and a fourth filter. The fourth filter is located at the air inlet. The spare gas cylinder is located between the air source switch and the fourth filter. The pressure gauge is located on the air source pipeline and is connected to the spare gas cylinder and the air inlet. The pressure relief valve and the pressure relief switch are respectively located between the pressure regulating valve and the pneumatic oil seal switch through interconnected air source pipelines.

[0015] In some embodiments of the present invention, the first oil seal system, the second oil seal system, the pneumatic oil seal system, and the PLC controller are all mounted on the vehicle frame.

[0016] In some embodiments of the present invention, the oil tank is further provided with a temperature sensor and a level gauge, and the temperature sensor is connected to a PLC controller.

[0017] In some embodiments of the present invention, the fuel tank is provided with a filling port, an air filter is provided at the filling port, and a filling valve is provided between the air filter and the fuel tank.

[0018] In some embodiments of the present invention, a pressure control valve is provided on the electric oil seal pipeline, and the pressure control valve is connected to the self-circulation pipeline.

[0019] In some embodiments of the present invention, the oil seal pipeline is further provided with a pressure sensor and a pressure gauge, and the pressure gauge and the pressure sensor are connected.

[0020] In some embodiments of the present invention, the oil seal pipeline is further provided with a first filter and a second filter, which are connected sequentially along the oil flow direction.

[0021] In some embodiments of the present invention, the self-circulating pipeline unit further includes a sampling port and an air cooler, both of which are disposed on the self-circulating pipeline, and a sampling valve is provided at the sampling port.

[0022] In some embodiments of the present invention, the electric oil seal pipeline is further provided with a hose reel, which is located near the end of the electric oil seal pipeline.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0024] This invention utilizes a first oil seal system, a second oil seal system, and a pneumatic oil seal system. The first oil seal system includes an electric oil seal pipeline unit and a self-circulating pipeline unit. The electric oil seal pipeline unit includes an oil tank, a motor pump unit, a check valve, and a solenoid valve. A heater is installed inside the oil tank and is connected to a PLC controller. The oil tank, the motor pump unit, and the solenoid valve are sequentially connected along the oil flow direction via oil seal pipelines. The check valve is connected in parallel with the motor pump unit via an oil seal pipeline. The end of the oil seal pipeline is connected to the self-circulating pipeline unit via an oil outlet. The system has a self-circulating interface connection, and the self-circulating pipeline unit is connected to the oil tank through the self-circulating pipeline. The self-circulating pipeline is equipped with a third filter, which is connected to the oil tank. The pneumatic oil seal system includes a gas source pipeline connected to the oil tank. The gas source pipeline is provided with an air inlet, a gas source switch, a pressure regulating valve, and a pneumatic oil seal switch in sequence along the gas flow direction. The air inlet is connected to a nitrogen cylinder. The second oil seal system has the same structure as the first oil seal system, and both the first oil seal system and the second oil seal system are connected to the pneumatic oil seal system. The oil sealing device of this invention, by setting up two oil sealing systems, can use two different oil media to meet the different needs of dual engines. A heater in the oil tank removes water from the oil medium at high temperature. The oil outlet is connected to a self-circulation unit, and the filter in the self-circulation unit enables self-circulation purification of the oil. After purification, the oil outlet and self-circulation interface are disconnected and connected to the engine oil circuit interface for oil sealing. Specifically, a motor pump unit delivers the oil medium from the oil tank to the engine via a solenoid valve for oil sealing, where the solenoid valve controls oil interruption. A pneumatic oil sealing system enables emergency oil sealing in the event of a power outage. An external nitrogen cylinder is connected, and the pressure in the nitrogen cylinder is reduced to the oil tank, pressurizing the tank and forcing the oil out through a check valve and a solenoid valve to the engine for oil sealing. The oil sealing device of this invention adopts a dual oil sealing system, integrating heating and oil sealing, which can meet the needs of different sizes of dual engines using different oil media. The added pneumatic oil sealing system realizes both electric oil sealing and pneumatic oil sealing functions, and the self-circulation pipeline unit can realize the self-circulation and purification of the oil media. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the novel twin-engine aircraft engine oil sealing device in an embodiment of the present invention.

[0027] Attached reference numerals: 1. First oil seal system; 2. Second oil seal system; 3. Pneumatic oil seal system; 300. Air source pipeline; 301. Air inlet; 302. Air source switch; 303. Pressure regulating valve; 304. Pneumatic oil seal switch; 305. Spare gas cylinder; 306. Pressure gauge; 307. Pressure relief valve; 308. Pressure relief switch; 309. Fourth filter; 100. Oil tank; 101. Motor pump set; 102. Check valve; 103. Solenoid valve; 104. Pressure sensor; 105. 106. Pressure gauge; 107. Pressure control valve; 108. First filter; 109. Second filter; 100. Oil seal pipeline; 111. Oil outlet port; 112. Self-circulation port; 113. Self-circulation pipeline; 114. Third filter; 115. Heater; 116. Temperature sensor; 117. Level gauge; 118. Air filter; 119. Filling valve; 120. Sampling valve; 121. Oil drain valve; 122. Tubing reel; 123. Air cooler; 124. Vent valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances. Example

[0034] Reference Figure 1 , Figure 1 This is a schematic diagram of the overall structure of the novel twin-engine aircraft engine oil sealing device in an embodiment of the present invention;

[0035] A novel oil sealing device for a twin-engine aircraft engine, specifically comprising: a first oil sealing system 1, a second oil sealing system 2, and a pneumatic oil sealing system 3;

[0036] The first oil seal system 1 includes an electric oil seal pipeline unit 109 and a self-circulation pipeline unit 112. The electric oil seal pipeline unit 109 includes an oil tank 100, a motor pump unit 101, a one-way valve 102, and a solenoid valve 103. The oil tank 100 is equipped with a heater 114, which is connected to a PLC controller. The oil tank 100, the motor pump unit 101, and the solenoid valve 103 are connected sequentially along the oil flow direction through the oil seal pipeline 109. The one-way valve 102 is connected in parallel with the motor pump unit 101 through the oil seal pipeline 109. The end of the oil seal pipeline 109 is connected to the self-circulation interface 111 of the self-circulation pipeline unit 112 through an oil outlet interface 110. The self-circulation pipeline unit 112 is connected to the oil tank 100 through the self-circulation pipeline 112. A third filter 113 is provided on the self-circulation pipeline 112, and the third filter 113 is connected to the oil tank 100.

[0037] The pneumatic oil seal system 3 includes an air source pipeline 300 connected to the oil tank 100. An air inlet 301, an air source switch 302, a pressure regulating valve 303 and a pneumatic oil seal switch 304 are sequentially arranged on the air source pipeline 300 along the gas flow direction. The air inlet 301 is connected to a nitrogen cylinder.

[0038] The second oil seal system 2 has the same structure as the first oil seal system 1, and both the first oil seal system 1 and the second oil seal system 2 are connected to the pneumatic oil seal system 3.

[0039] This invention utilizes a first oil seal system 1, a second oil seal system 2, and a pneumatic oil seal system 3. The first oil seal system 1 includes an electric oil seal pipeline unit 109 and a self-circulating pipeline unit 112. The electric oil seal pipeline unit 109 includes an oil tank 100, a motor pump unit 101, a check valve 102, and a solenoid valve 103. A heater 114 is installed inside the oil tank 100 and is connected to a PLC controller. The oil tank 100, the motor pump unit 101, and the solenoid valve 103 are connected sequentially along the oil flow direction through the oil seal pipeline 109. The check valve 102 is connected in parallel with the motor pump unit 101 through the oil seal pipeline 109. The end of the oil seal pipeline 109 is connected to the self-circulating pipeline unit 112 through an oil outlet port 110. The self-circulation interface 111 of the loop pipeline 112 unit is connected, and the self-circulation pipeline 112 unit is connected to the oil tank 100 through the self-circulation pipeline 112. The self-circulation pipeline 112 is equipped with a third filter 113, which is connected to the oil tank 100. The pneumatic oil seal system 3 includes an air source pipeline 300 connected to the oil tank 100. The air source pipeline 300 is provided with an air inlet 301, an air source switch 302, a pressure regulating valve 303, and a pneumatic oil seal switch 304 in sequence along the gas flow direction. The air inlet 301 is connected to a nitrogen cylinder. The second oil seal system 2 has the same structure as the first oil seal system 1, and both the first oil seal system 1 and the second oil seal system 2 are connected to the pneumatic oil seal system 3. The oil sealing device of this invention, by setting up two oil sealing systems, can use two different oil media to meet the different needs of dual engines. The oil media is dehydrated at high temperature by the heater 114 in the oil tank 100. It is connected to the self-circulation unit through the oil outlet 110. The oil is purified by self-circulation through the filter in the self-circulation unit. After purification, the oil outlet 110 and the self-circulation interface 111 are disconnected and connected to the engine oil circuit interface to perform oil sealing. Specifically, the oil media in the oil tank 100 is delivered to the engine for oil sealing by the motor pump 101 through the solenoid valve 103, where the solenoid valve 103 is used to control the interruption of oil supply. By setting up the pneumatic oil sealing system 3, emergency oil sealing can be performed in special cases where there is no electricity. By connecting an external nitrogen cylinder, the nitrogen cylinder is depressurized to the oil tank 100, which is pressurized. The pressurized oil is forced out and delivered to the engine through the one-way valve 102 and the solenoid valve 103, thereby performing oil sealing. The oil sealing device of the present invention adopts a dual oil sealing system, integrating heating and oil sealing, which can meet the needs of different sizes of dual engines using different oil media. The added pneumatic oil sealing system 3 realizes both electric oil sealing and pneumatic oil sealing functions, and the self-circulation pipeline 112 unit can realize the self-circulation and purification of oil media.

[0040] The following will further describe a novel twin-engine aircraft engine oil sealing device in this exemplary embodiment.

[0041] In one embodiment of this invention, the oil sealing device includes a first oil sealing system 1, a second oil sealing system 2, and a pneumatic oil sealing system 3. The first oil sealing system 1 and the second oil sealing system 2 have the same structure and are both connected to the pneumatic oil sealing system 3. The first oil sealing system 1, the second oil sealing system 2, and the pneumatic oil sealing system 3 are all installed in the frame. The bottom of the frame is equipped with rollers for easy movement. Since the first oil sealing system 1 and the second oil sealing system 2 have the same structure, the specific oil sealing structure will be described below with reference to the first oil sealing system 1.

[0042] In one embodiment of this invention, the first oil seal system 1 includes an electric oil seal pipeline unit 109 and a self-circulating pipeline unit 112. The electric oil seal pipeline unit 109 includes an oil tank 100, a motor pump unit 101, a one-way valve 102, and a solenoid valve 103. The one-way valve 102 allows oil to pass through in one direction, and the solenoid valve 103 controls the flow of oil. The oil tank 100 has a filler port, and an air filter 117 is installed at the filler port. A filler valve 118 is installed between the air filter 117 and the oil tank 100. The bottom of the oil tank 100 has an oil outlet, and a drain valve 120 is installed at the oil outlet. The filler valve 118 and the drain valve 120 are respectively used for… For controlling refueling and discharging, the aforementioned fuel tank 100 is equipped with a heater 114, which is connected to a PLC controller housed within the vehicle frame. The fuel tank 100 also contains a temperature sensor 115 and a level gauge 116. The temperature sensor 115, connected to the PLC controller, is primarily used for high-temperature dehydration of the fuel. The heater 114 heats the fuel medium, allowing the water in the fuel in the tank 100 to fully vaporize and precipitate, reducing the water content. The temperature sensor 115 detects the fuel temperature and transmits the signal to the PLC controller, which then controls the heating temperature of the heater 114, achieving automated high-temperature dehydration. The level gauge 116 is located on the side wall of the fuel tank 100 and detects the fuel content within the tank, displaying the fuel level externally for easy observation of the remaining fuel level and timely refueling. The aforementioned oil tank 100 is also provided with a vent hole, and a vent valve 123 is provided at the vent hole. The vent valve 123 controls the opening and closing of the vent hole for the oil tank 100 to vent.

[0043] In one specific implementation, heater 114 heats the oil to above 100°C and continues for a period of time, allowing the water in the oil in tank 100 to fully vaporize and precipitate, thus reducing the water content in the oil. The entire process only requires pressing the dewatering button, which is located outside the PLC controller and connected to it. The temperature sensor 115 of tank 100 feeds back the temperature to the PLC to control the start and stop of heater 114. The PLC automatically controls the oil temperature, and the equipment automatically shuts off the dewatering function after the dewatering is completed.

[0044] The oil tank 100, motor pump set 101 and solenoid valve 103 are connected in sequence along the oil flow direction through oil seal pipeline 109. The check valve 102 is connected in parallel with motor pump set 101 through oil seal pipeline 109. The oil seal pipeline 109 is also provided with a first filter 107 and a second filter 108. The first filter 107 and the second filter 108 are connected in sequence along the oil flow direction and are located between solenoid valve 103 and check valve 102. The filters are mainly used to filter oil and improve the oil's contamination level of solid particles. The end of the aforementioned oil seal pipeline 109 is connected to the self-circulation interface 111 of the self-circulation pipeline 112 unit via an oil outlet interface 110. The self-circulation pipeline 112 unit is connected to the oil tank 100 via the self-circulation pipeline 112. A third filter 113 is provided on the self-circulation pipeline 112, and the third filter 113 is connected to the oil tank 100. The self-circulation pipeline 112 unit also includes a sampling port and an air cooler 122, both of which are located on the self-circulation pipeline 112. A sampling valve 119 is provided at the sampling port. The air cooler 122 is located on the self-circulation pipeline 112. Specifically, the air cooler 122 may include heat sinks and a cooling fan. The heat sinks are located on the self-circulation pipeline 112. The self-circulation pipeline 112 unit is mainly used to perform self-circulation purification of the oil medium before oil sealing, ensuring the purity of the oil medium during oil sealing.

[0045] It should be noted that electric oil seals are used under normal power conditions, and are generally used after high-temperature dehydration and self-circulation are completed.

[0046] In one specific implementation, the oil outlet 110 of the oil seal pipeline 109 and the self-circulation interface 111 of the self-circulation pipeline 112 are connected (manual connection). The motor pump unit 101 is started, and the oil medium in the oil tank 100 is circulated sequentially through the motor pump unit 101, solenoid valve 103, oil outlet 110, self-circulation interface 111, and third filter 113 before being transported back to the oil tank 100. The third filter 113 filters and purifies the oil. After self-circulation in the oil seal pipeline 109 and self-circulation pipeline 112 for 2-4 hours, a sample is taken through the sampling valve 119 and sent to the laboratory for testing. If the oil medium contamination level meets the standard, the oil seal can be performed. When performing electric oil sealing, disconnect the oil outlet 110 and the self-circulation interface 111, connect the oil outlet 110 of the oil seal pipeline 109 to the engine oil circuit interface (manual connection), and start the motor pump set 101 to perform engine oil sealing. Specifically, the motor pump set 101 draws oil from the oil tank 100, filters it through the first filter 107 and the second filter 108, and flows it to the engine through the solenoid valve 103 to perform oil sealing on the engine.

[0047] In one embodiment of this invention, the oil seal pipeline 109 is provided with a pressure control valve 106, which is connected to the self-circulation pipeline 112. The pressure control valve 106 is used for pressure control of the equipment oil seal system.

[0048] In one embodiment of this invention, the oil seal pipeline 109 is further equipped with a pressure sensor 104 and a pressure gauge 306, with the pressure gauge 306 connected to the pressure sensor 104. The pressure sensor 104 is used to detect the oil pressure in the oil seal pipeline 109 and displays it through the pressure gauge 306, i.e., to display the oil seal pressure.

[0049] In one embodiment of this invention, the oil seal pipeline 109 is further provided with a hose reel 121, which is located near the end of the electric oil seal pipeline 109 and is used for coiling the oil seal pipeline 109.

[0050] In one embodiment of this invention, the pneumatic oil seal system 3 includes a gas source pipeline 300 connected to the oil tank 100. The gas source pipeline 300 is provided with an air inlet 301, a gas source switch 302, a pressure regulating valve 303 and a pneumatic oil seal switch 304 in sequence along the gas flow direction. The air inlet 301 is connected to a nitrogen cylinder.

[0051] It should be noted that the above-mentioned pneumatic oil seal system 3 is used for emergency oil seal in special circumstances where there is no power. By connecting an external nitrogen cylinder, the nitrogen cylinder is depressurized to the oil tank 100, which in turn increases the pressure of the oil tank 100, and the increased pressure forces the oil to the engine.

[0052] As an example, the merchant's pneumatic oil seal system 3 also includes a spare gas cylinder 305, a pressure gauge 306, a pressure relief valve 307, a pressure relief switch 308, and a fourth filter 309. The fourth filter 309 is located at the air inlet 301. The spare gas cylinder 305 is located between the gas source switch 302 and the fourth filter 309, and the spare gas cylinder 305 stores spare gas. The pressure gauge 306 is located on the gas source pipeline 300 and is connected to the spare gas cylinder 305 and the air inlet 301. The pressure relief valve 307 and the pressure relief switch 308 are respectively located between the pressure regulating valve 303 and the pneumatic oil seal switch 304 through the interconnected gas source pipeline 300. The pressure relief valve 307 is used to limit the maximum pressure of the gas injected into the oil tank 100, and the pressure relief switch 308 is used to release the pressure of the gas system.

[0053] In one specific implementation, the pneumatic oil seal switch 304 and the air source switch 302 are turned on. Nitrogen gas from the external nitrogen cylinder is filtered by the fourth filter 309 and then the gas pressure is regulated by the pressure regulating valve 303 before being delivered to the oil tank 100, thus pressurizing the oil tank 100. Under the pressure in the oil tank 100, the oil is forced out to the oil seal pipeline 109, and flows into the engine through the one-way valve 102, the first filter 107, the second filter 108, and the solenoid valve 103, ultimately performing engine oil sealing. The aforementioned spare gas cylinder 305 is used when it is inconvenient to connect an external nitrogen cylinder, so that the starting oil seal system can promptly perform engine oil sealing in emergency situations.

[0054] It should be noted that the second oil seal system 2 has the same structure as the first oil seal system 1, and is symmetrically arranged in the frame with the first oil seal system 1. Both are connected to the starting oil seal system, that is, each controls the opening and closing of the air supply pipeline 300 through a pneumatic oil seal switch 304. The two oil seal systems can be controlled independently and sealed separately, which is highly flexible and highly automated.

[0055] The beneficial effects of this invention are:

[0056] By setting up two oil sealing systems, a dual-system oil sealing is achieved, which allows the use of two different oil media to meet the needs of dual engines.

[0057] By combining the pneumatic oil seal system 3 with the electric oil seal, both functions of electric and pneumatic oil seals can be achieved. The pneumatic oil seal serves as a backup oil seal system, providing emergency oil sealing when there is no power.

[0058] The heater 114 and temperature sensor 115 installed inside the oil tank 100 integrate heating and oil sealing, and have an automated high-temperature water removal function.

[0059] Physical safety valves, such as the pressure control valve 106 on the oil seal pipeline 109 and the pressure regulating valve 303 and pressure limiting valve 307 on the air source pipeline 300, are used to ensure that the equipment oil tank 100 does not exceed the pressure in closed mode, thus ensuring the safety of the oil seal.

[0060] The PLC controller automatically controls the high-temperature dewatering process and the operation of the motor pump unit 101, improving equipment automation and simplifying equipment operation.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A twin aircraft engine oil seal apparatus, characterized by, The first oil seal system, the second oil seal system and the pneumatic oil seal system are provided. The first oil seal system comprises an electric oil seal pipeline unit and a self-circulation pipeline unit, the electric oil seal pipeline unit comprises an oil tank, a motor pump group, a check valve and an electromagnetic valve, a heater is arranged in the oil tank, the heater is connected with a PLC controller, the oil tank, the motor pump group and the electromagnetic valve are connected in sequence through an oil seal pipeline along an oil flow direction, and the check valve is arranged in parallel with the motor pump group through the oil seal pipeline; an oil outlet interface is arranged at the end of the oil seal pipeline and connected with a self-circulation interface of the self-circulation pipeline unit, the self-circulation pipeline unit is connected with the oil tank through a self-circulation pipeline, and a third filter is arranged on the self-circulation pipeline and communicated with the oil tank. The pneumatic oil seal system comprises a gas source pipeline communicated with the oil tank, an air inlet, a gas source switch, a pressure regulating valve and a pneumatic oil seal switch are arranged in sequence on the gas source pipeline along a gas flow direction, and the air inlet is connected with a nitrogen cylinder; the pneumatic oil seal system further comprises a standby gas cylinder, a pressure gauge, a pressure limiting valve, a pressure relief switch and a fourth filter, the fourth filter is arranged at the air inlet, the standby gas cylinder is arranged between the gas source switch and the fourth filter, the pressure gauge is arranged on the gas source pipeline and communicated with the standby gas cylinder and the air inlet, and the pressure limiting valve and the pressure relief switch are arranged between the pressure regulating valve and the pneumatic oil seal switch through gas source pipelines communicated with each other. The second oil seal system has the same structure as the first oil seal system, and the first oil seal system and the second oil seal system are both connected with the pneumatic oil seal system; the first oil seal system, the second oil seal system, the pneumatic oil seal system and the PLC controller are all arranged on a vehicle frame.

2. The twin aircraft engine oil seal apparatus of claim 1, wherein, A temperature sensor and a liquid level gauge are further arranged in the oil tank, and the temperature sensor is connected with the PLC controller.

3. The twin aircraft engine oil seal apparatus of claim 1, wherein, An oil filling port is arranged on the oil tank, an air filter is arranged at the oil filling port, and an oil filling valve is arranged between the air filter and the oil tank.

4. The twin aircraft engine oil seal apparatus of claim 1, wherein, A pressure control valve is arranged on the oil seal pipeline and communicated with the self-circulation pipeline.

5. The twin aircraft engine oil seal apparatus of claim 1, wherein, A pressure sensor and a pressure gauge are further arranged on the oil seal pipeline, and the pressure gauge and the pressure sensor are connected.

6. The twin aircraft engine oil seal apparatus of claim 1, wherein, A first filter and a second filter are further arranged on the oil seal pipeline and connected in sequence along the oil flow direction.

7. The twin aircraft engine oil seal apparatus of claim 1, wherein, The self-circulation pipeline unit further comprises a sampling port and an air cooler, and the sampling port and the air cooler are both arranged on the self-circulation pipeline, and a sampling valve is arranged at the sampling port.

8. The twin aircraft engine oil seal apparatus of claim 1, wherein, A pipe winding device is further arranged on the oil seal pipeline and close to the end of the electric oil seal pipeline.

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