Flight outfield engine ground oil seal system

Abstract

The invention relates to a flight outfield engine ground oil seal system, and belongs to the technical field of flight outfield guarantee. A flight outfield engine ground oil seal system comprises an APU test bed, an auxiliary oil tank, an engine, an APU control board and an oil seal vehicle. The APU body is fixed on the rack by the APU test bed; the auxiliary fuel tank is communicated with the nitrogen charging vehicle, fuel in the auxiliary fuel tank is pressurized by nitrogen pressure provided by the nitrogen charging vehicle, and fuel is supplied to the APU and the engine; the engine and APU console 5 is connected with the APU to control the working states of the APU and the engine; oil seal pipe connectors of the oil seal vehicle are connected with oil seal connectors of the left engine and the right engine respectively. Compared with the prior art, the method has the following advantages that related resources of a flight outfield are utilized, manpower resources are saved, loss of an aircraft and an engine in the engine disassembling and assembling process is avoided, and unnecessary working time of the engine is shortened; the oil sealing work does not need to be completed specially by stopping an airplane, and the oil sealing cost of an engine returned to a factory is also saved.

Description

TECHNICAL FIELD

[0001] The application relates to a flight outfield engine ground oil sealing system and belongs to the technical field of flight outfield support. BACKGROUND

[0002] In order to ensure the completion of the flight task according to the node, the engine is immediately replaced and the fault is eliminated when the engine fault occurs in the flight outfield. The disassembled fault engine is not internally sealed and is only allowed to stay for one month. After one month, the engine needs to be reinstalled on the airplane for regular maintenance work. If the engine fault cannot be eliminated or the airplane needs to continuously perform the flight task, the engine often cannot complete the regular maintenance work of the engine on time. The internal oil sealing work of the engine is to connect the oil sealing vehicle with the oil sealing interface of the engine, and then perform false starting (starting without ignition of the combustion chamber). The oil sealing oil is provided by the oil sealing vehicle. At this time, the internal combustion chamber and pipeline of the engine are filled with oil sealing oil, which can protect the engine from rusting during long-term storage. However, the outfield does not have a special test bench of the engine manufacturing plant, and the oil sealing work of the engine must be performed by false starting of the engine. Therefore, the outfield usually uses the airplane as the oil sealing platform of the engine, that is, the airplane is used as the oil sealing platform of the engine. The engine to be sealed is installed on the airplane, and then the original engine is restored to the airplane. The disassembly and assembly of the engine is a complex work that needs to be completed by a team. First, the connections of the electrical connection, the fuel pipeline, the hydraulic pipeline and the engine fixing point with the airplane are disconnected. During the disassembly and assembly process, multiple people need to work together for several hours. The oil sealing work of the fault engine needs to be performed twice. After the disassembly and assembly work is completed, the hydraulic oil pollution degree detection, the fuel pollution degree detection, the engine level measurement and the engine test and other related inspection work need to be performed. Not only a large amount of human resources is consumed, but also a large amount of oil (fuel, hydraulic oil and lubricating oil) is consumed.

[0003] Since the airplane platform is needed in the outfield to complete the oil sealing work, a special airplane must be selected to complete the work, which will inevitably cause the airplane to be grounded and delay the flight task. Moreover, there is a risk of damage to the airplane body, the fixed mounting point of the engine, the pipeline and the cable connector during the disassembly and assembly of the engine. More importantly, after the original engine is reassembled, the engine test and inspection work need to be performed, which wastes the service life of the engine. SUMMARY

[0004] The application aims to provide a flight outfield engine ground oil sealing system which can save manpower, reduce disassembly and assembly damage and reduce unnecessary working time of the engine.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a flight field engine ground oil sealing system, comprising an APU test bench, a sub-oil tank, an engine and APU control platform, and an oil sealing vehicle; the APU test bench fixes the APU body on the bench; the sub-oil tank is communicated with the nitrogen charging vehicle, and the nitrogen pressure provided by the nitrogen charging vehicle is used to pressurize the fuel in the sub-oil tank to supply oil to the APU and the engine; the engine and APU control platform 5 is connected with the APU to control the working state of the APU and the engine; the oil sealing vehicle oil sealing pipe interface is respectively connected with the left engine and right engine oil sealing interface.

[0006] Further, the oil lever and the oil angle are further included, the oil lever is connected with the oil angle, the oil angle is changed by changing the oil lever, and the oil lever is used to control the change of the oil amount in the engine combustion chamber to change the state of the engine.

[0007] Preferably, the APU starting button and the APU emergency stop switch are arranged on the engine and APU control platform; the APU starting button sends a starting signal to the APU control box, the APU control box sends an instruction according to the internal operation logic to control the APU state change; and the APU emergency stop switch is used to shut down the APU.

[0008] Preferably, the engine control button is arranged on the engine and APU control platform, the engine control button sends a starting signal to the ECU, the ECU sends an instruction according to the internal operation logic to control the working state change of the engine.

[0009] Preferably, the main mounting section for mounting the APU, the left mounting bracket, and the right mounting bracket are arranged on the APU test bench; the APU is communicated with the left engine and the right engine through the fuel oil pipeline and the engine bleed air pipe.

[0010] Preferably, the oil feeding control switch is arranged on the engine and APU control platform, and after being turned on, the fuel oil pipeline starts to supply oil to the engine.

[0011] Preferably, the engine mounting vehicle for transporting the engine is further included, and the bottom of the engine mounting vehicle is provided with wheels and ground anchors.

[0012] Preferably, the gas inlet of the nitrogen charging vehicle is communicated with the sub-oil tank gravity oil inlet through a pressure gauge, and the sub-oil tank fuel outlet is communicated with the engine and the APU test bench through the fuel oil pipeline.

[0013] Working Principle: This invention utilizes existing field resources: auxiliary fuel tank, throttle control system, engine onboard cables, APU onboard cables, ECU, APU control box, fuel system supply lines, and a self-made APU test stand, engine, and APU control console. The auxiliary fuel tank uses nitrogen pressure provided by a nitrogen-filling vehicle to pressurize and supply fuel. The engine and APU control console control the APU's operating status via the APU emergency stop switch and APU start button. After the APU starts, pressurized gas is supplied to the left and right engines through the engine bleed air pipe. Because the engine only performs a dummy start during the unsealing and oil sealing process, its combustion chamber does not ignite, so the thrust generated by the left and right engines is almost zero. Therefore, the engine can be placed on the engine mounting vehicle, and the engine mounting vehicle can be secured by lifting the mounting brackets. The engine and APU control console can simultaneously control the left and right engines to perform a dummy start. The engine unsealing and oil sealing work is completed using the same operating method as for aircraft.

[0014] Compared with the prior art, the present invention has the following advantages: 1. It utilizes relevant resources at the flight field, saves human resources, avoids damage to the aircraft and engine during engine disassembly and assembly, and reduces unnecessary engine operating time. 2. There is no need to ground the aircraft to complete the oil sealing work, which also saves the cost of returning the engine to the factory for oil sealing. Attached Figure Description

[0015] Figure 1 This is a general working framework diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the APU control principle framework in an embodiment of the present invention; Figure 3 This is a schematic diagram of the engine control principle in an embodiment of the present invention; Figure 4 This is a schematic diagram of the engine fuel control principle in an embodiment of the present invention; Figure 5 This is a schematic diagram of the auxiliary fuel tank structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal installation of the APU test bench body in an embodiment of the present invention; Figure 7 This is a schematic diagram of the engine mounting vehicle structure in an embodiment of the present invention; Figure 8 This is a schematic diagram of the overall fuel supply pipeline of the small engine and the engine in an embodiment of the present invention; Figure 9 This is a schematic diagram of the connection of the small-scale air duct in an embodiment of the present invention; Figure 10 This is a schematic diagram of the engine and APU control console switch buttons in an embodiment of the present invention; Figure 1 The components are: 1. Engine; 2. APU test bench; 3. Throttle angle; 4. Throttle lever; 5. Engine and APU control panel; 6. Auxiliary fuel tank; 7. Nitrogen-filled vehicle. Figure 2 In the middle, 8. APU control box; 9. APU operating status changes; Figure 3 In the middle, 10. ECU; 11. Changes in engine operating status; Figure 4 12. Changes in fuel quantity in the engine combustion chamber; Figure 5 In the middle, 13. Fuel outlet of auxiliary fuel tank; 14. Gravity refueling port of auxiliary fuel tank; Figure 6 In the middle, 15. Main mounting section; 16. Left mounting support; 17. Right mounting support; Figure 7 In the middle, 18, the foot of the ground; 19, the foot of the ground; Figure 8 In the middle, 20, small hair; 21, left hair; 22, right hair; Figure 9 In the middle, 23, left-hand ATS; 24, right-hand ATS; Figure 10 In the middle, 25. Left fuel pump switch; 26. Right fuel pump switch; 27. Left engine cold run switch; 28. Right engine cold run switch; 29. ​​APU start button; 30. APU emergency stop switch; 31. Left engine start button; 32. Right engine start button. Detailed Implementation

[0016] The following is in conjunction with the appendix Figures 1-10 The present invention is further described in detail as follows: A ground oil sealing system for an engine in flight field includes an APU test stand 2, an auxiliary fuel tank 6, an engine bleed air pipe, a fuel supply line, an engine control cable, an APU control cable, an engine and APU control console 5, and an engine installation vehicle.

[0017] Ground oil seal system usage steps: Step 1: Assembly Tool Connection. Push the engine mounting vehicle to the test drive area, raise the four mounting feet 18 and 19 of the engine mounting vehicle, and securely fix the engine mounting vehicle. According to... Figures 8-9 Complete the connection of the pipelines and fuel lines between engine 1 and APU, and connect the ECU and APU control cables according to... Figure 10The control panel switches are connected. Pressing the APU start button on the engine and APU control panel 5 sends a start signal to the APU control box 8. The APU control box 8, according to its internal operating logic, issues commands to control the APU state changes 9. Pressing the engine control button on the engine and APU control panel 5 sends a start signal to the ECU 10. The ECU 10, according to its internal operating logic, issues commands to control the engine's operating state changes 11. Changing the throttle angle 3 by adjusting the throttle lever 4 controls the fuel quantity in the engine combustion chamber 12, thus changing the engine state. Figure 6 As shown, the APU test stand 2 secures the APU body, left engine, and right engine to the stand via the main mounting section 15, left mounting bracket 16, and right mounting bracket 17, respectively. For example... Figure 8 As shown, the APU body is connected to the small engine 20 via a fuel line, and the left and right engines are connected to the left and right engines respectively via fuel lines. Install the auxiliary fuel tank pressure gauge onto the auxiliary fuel tank gravity filler port 14, and connect the nitrogen filling port on the nitrogen filling vehicle to the adapter on the auxiliary fuel tank pressure gauge. Step 2: Engine Unsealing. Turn on the nitrogen filling switch on the nitrogen filling vehicle 7. Nitrogen gas is used to pressurize the fuel in the auxiliary fuel tank. The nitrogen pressure then supplies fuel to the APU (Auxiliary Power Unit, consisting of the APU body, APU control box, and APU cables) and engine through the fuel outlet 13 and fuel lines. Figure 9 As shown, after the APU starts working, the generated gas passes through... Figure 9 The pipelines supply fuel to the left engine ATS 23 and right engine ATS 24, which are the installation locations of the air turbine starters for the left and right engines, respectively. The air turbine starters of the left and right engines are driven by the gas generated during APU operation. This gas is then transmitted through gears within the starters to the output shafts of the left and right engines, causing the fans and turbines of the left and right engines to rotate. After the fans and turbines reach a certain speed, the combustion chambers of the left and right engines ignite, and the engines begin to operate. The starting process is then autonomously controlled by the ECU (Electronic Control Unit) internal control logic. Step 3: Turn on the left fuel pump control switch 25 and the right fuel pump control switch 26 on the engine and APU control panel to the operating position. The fuel supply lines begin supplying fuel to the engines. Step 4: Move the APU emergency stop switch 30 on the engine and APU control panel forward to the working position, press the APU start button 29, and the APU will start working. If the APU or oil seal system malfunctions during the APU's operation, the APU emergency switch 30 can be moved to the emergency stop position to shut down the APU in an emergency. Step 5: Set the left engine cold start switch 27 and the right engine cold start switch 28 on the engine and APU control panel to the cold start position. Set the throttle angle of the left and right engines to the maximum throttle angle through the throttle angle setting in the ECU program. Press the left engine start button 31 and the right engine start button 32 respectively to perform a fake start on the left and right engines in sequence, and complete the opening of the left and right engines. Step 6: After the unsealing work is completed, turn the APU emergency stop switch 30 on the engine and APU control panel to the parking position. The APU will stop. Then turn the left fuel pump control switch 25 and the right fuel pump control switch 26 to the off position. Step 7: Begin oil sealing work. Connect the oil seal pipe interface of the oil seal vehicle to the oil seal interfaces of the left and right engines respectively. Start the oil seal vehicle, move the APU emergency stop switch 30 on the engine and APU control panel forward to the working position, press the APU start button 29, and the APU will start working. Move the left engine cold run switch 27 and the right engine cold run switch 28 to the cold run position. Set the throttle angle of the left and right engines to the maximum throttle angle through the throttle angle setting in the ECU program. Press the left engine start button 31 and the right engine start button 32 respectively to perform a fake start on the left and right engines in sequence, and complete the oil sealing work of the left and right engines. Step 8: After the oil sealing work is completed, move the APU emergency stop switch 30 on the engine and APU control panel to the parking position, and the APU will stop. Step 9: Disconnect the fuel supply lines and engine cables between the engine and the APU, loosen the engine mounting feet, and return the engine to the warehouse for storage. Step 10: Disconnect the auxiliary fuel tank pressure gauge adapter installed on the auxiliary fuel tank gravity filling port 14 from the nitrogen filling vehicle, remove the auxiliary fuel tank pressure gauge, direct the nitrogen filling vehicle to evacuate, and reinstall the auxiliary fuel tank on the aircraft or push it back to the warehouse.

[0018] This invention makes full use of relevant resources in the flight field, which can effectively save costs such as human resources and oil resources, reduce the risk of damage to the aircraft and engine body caused by engine disassembly and assembly, reduce unnecessary wear and tear on engine life, eliminate the need to ground the aircraft to use as an engine oil sealing platform, ensure the effective execution of flight missions, reduce the transportation costs of returning the engine to the factory for oil sealing, and avoid the risk of transportation damage.

Claims

1. An out-of-flight field engine ground oil seal system characterized by: It includes APU test bench, sub-tank, engine and APU console, oil seal vehicle; APU test bench fixes APU body on the bench; sub-tank is communicated with nitrogen filling vehicle, and uses nitrogen pressure provided by nitrogen filling vehicle to pressurize fuel in sub-tank, and provides oil for APU and engine; engine and APU console 5 are connected with APU, and control working state of APU and engine; oil seal vehicle oil seal pipe interface is respectively connected with left engine and right engine oil seal interface.

2. The flight line engine ground oil seal system of claim 1, wherein: It also includes throttle lever and throttle angle, the throttle lever is connected with the throttle angle, the throttle angle is changed by changing the throttle lever, and is used for controlling the change of oil quantity in the engine combustion chamber, so that the state of the engine is changed.

3. The flight line engine ground oil seal system of claim 1, wherein: APU start button and APU emergency stop switch are arranged on the engine and APU console; the APU start button sends a start signal to the APU control box, the APU control box sends an instruction according to its internal operation logic to control the change of APU state; the APU emergency stop switch is used to turn off the APU.

4. The flight line engine oil seal system of claim 1, wherein: Engine control button is arranged on the engine and APU console, the engine control button sends a start signal to the ECU, and the ECU sends an instruction according to its internal operation logic to control the change of working state of the engine.

5. The flight line engine oil seal system of claim 1, wherein: Main mounting section for mounting APU, left mounting bracket and right mounting bracket are arranged on the APU test bench; APU is communicated with left engine and right engine through fuel oil pipeline and engine bleed air pipe.

6. The flight line engine oil seal system of claim 1, wherein: Oil supply control switch is arranged on the engine and APU console, after being turned on, the fuel oil pipeline starts to supply oil to the engine.

7. The flight line engine oil seal system of claim 1, wherein: It also includes engine mounting vehicle for conveying the engine, and the bottom of the engine mounting vehicle is provided with wheels and ground anchors.

8. The flight line engine oil seal system of claim 1, wherein: The gas inlet of the nitrogen filling vehicle is communicated with the gravity oil filling port of the sub-tank through a pressure gauge, and the fuel outlet of the sub-tank is communicated with the engine and APU test bench through the fuel oil pipeline.

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