Oil sealing method for aero-engine

Abstract

The invention discloses an oil sealing method for an aero-engine, the oil sealing method adopts ground power oil sealing equipment to perform oil sealing on an engine to be subjected to oil sealing, and the oil sealing method comprises the following steps: S1, heating oil sealing oil, and dehydrating the heated oil sealing oil; s2, cooling the oil seal oil; and S3, the engine to be subjected to oil sealing is subjected to oil sealing. By the adoption of the oil sealing method, the requirement for ground oil sealing of the aero-engine can be met by configuring the vehicle body assembly, and through the hydraulic control system and the electric control system installed in the vehicle body assembly, the requirements for oil seal oil self-circulation filtering cleaning, heating dehydration, cooling and oil sealing can be met; and the requirements for nitrogen charging and oil removal can be met, the operation convenience and maintenance efficiency of maintenance personnel are greatly improved, the working intensity and the oil seal cost are reduced, and the device is suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular to an oil sealing method for an aero-engine. Background Art

[0002] According to the maintenance regulations of aircraft engines, engines that are not used for a long time must be oil-sealed before being sealed. The main function of the oil seal is to inject aviation lubricating oil into the entire fuel system of the engine and fill it with the oil seal oil sprayed out during the oil seal to seal the surfaces of the combustion chamber, turbine components, and diffuser components to prevent the surfaces of the components in the fuel system from rusting and causing system failures. When the aircraft engine needs to be used, the engine is unsealed and the fuel system of the engine is flushed with fuel to remove the lubricating oil left after the oil seal. At the same time, the air in the engine fuel system is removed and the system sealing is checked. The oil sealing and unsealing operations can ensure the integrity of the engine during the storage period and ensure that the engine can be used normally after unsealing.

[0003] For engines that have been stored in ground warehouses for a long time, according to the relevant maintenance standards of the engine, the engine needs to be oil-sealed again every 6 months. At present, there are roughly two methods for oil sealing of domestic aviation engines. One is to reassemble the engine to be oil-sealed to the aircraft performing the mission for oil sealing, and the other is to send it to the repair shop for oil sealing. The existing oil sealing methods have different defects. If the oil sealing is done on the aircraft, the engine that is in good working condition needs to be dragged off the aircraft performing the mission, and then the engine to be oil-sealed is installed in the aircraft for oil sealing. After the oil sealing is completed, the original engine is installed and worked. In this way, the engine needs to be disassembled and assembled at least four times to complete the oil sealing work. The workload is large and the cycle is long. The oil sealing time of each engine is about 2 to 3 days, and the engine is assembled and disassembled on the aircraft many times, which may cause unnecessary damage to the engine. When there are many engines on the ground, the working aircraft will be occupied for a long time for oil sealing work, which seriously restricts the aircraft attendance rate. For oil sealing sent to the repair shop, the engine is loaded and transported to the repair shop, and it needs to be transported back after the oil sealing is completed. Not only is the cycle long, but the cost is also expensive. The oil sealing time of each engine is about 20 days. The engine needs to be transported and assembled and disassembled twice on the test bench, which may cause damage. In addition, each engine needs to be properly allocated for testing, which not only affects the oil seal work, but also affects the normal work progress of the repair shop.

[0004] After searching, the patent document with application publication number CN118242437A discloses a ground oil sealing method for an aircraft engine, while the patent document with application publication number CN 117550542 A discloses an aircraft engine oil sealing vehicle and an oil sealing method. From the contents disclosed in the two retrieved patent documents, it can be seen that a method for oil sealing an engine is provided from different angles. In order to be able to meet the oil sealing work of the engine on the ground, there is no need to perform it on a test bench or an aircraft, thereby reducing the oil sealing cost and cycle, thereby providing an oil sealing method different from that disclosed in the prior art, so as to meet the oil sealing work of the engine on the ground. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the problems existing in the background technology. In order to meet the oil sealing work of the engine on the ground, an oil sealing method is provided. By configuring a ground power oil sealing device, there is no need to perform oil sealing operations on a test bench or an aircraft. This can not only improve work efficiency, but also reduce oil sealing costs and cycles, so as to meet the use requirements of the engine. Specifically, it is an oil sealing method for aircraft engines.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an oil sealing method for an aircraft engine, wherein the oil sealing method uses a ground power oil sealing device to seal the engine to be oil-sealed, and comprises the following process: S1. Dehydrating the oil seal oil after heating; S2. Cooling the oil seal oil; S3. Oil seal the oil-sealed engine; The ground power oil seal equipment includes a vehicle body component and a hydraulic control system installed in the vehicle body component. The hydraulic control system includes an oil tank, an oil pump, a quick-change joint, an oil injection hose, an oil inlet hose, an air charging joint and a control valve. The control valve includes a solenoid valve, a check valve and a throttle valve. A heating device for heating and dehydrating the oil seal oil is provided in the oil tank. The outlet end of the oil tank is provided with a main pipeline, and the inlet end of the oil tank is provided with an oil return socket, and in the main pipeline, a solenoid valve A, a solenoid valve B, a throttle valve and a check valve A are sequentially connected in series along the conveying direction of the oil seal oil, the oil pump is installed on the main pipeline between the solenoid valve A and the solenoid valve B, the quick-change joint is installed on the output end of the oil injection hose, the input end of the oil injection hose is connected to the main pipeline at the output end of the check valve A, the quick-change joint is detachably connected to the engine to be oil-sealed or the oil return socket, and the quick-change joint is used to realize oil sealing of the engine to be oil-sealed, or realize self-circulation filtration and cleaning of the oil seal oil in the oil tank; The hydraulic control system also includes an oil inlet pipeline, a cooling pipeline and a nitrogen filling and oil removal pipeline which are in communication with the main pipeline, wherein: The input end of the oil inlet pipeline is connected to the main pipeline between the solenoid valve A and the throttle valve, and the output end is connected to the solenoid valve B. The oil inlet hose is connected to the oil inlet pipeline through an oil pump, and an oil source for oil seal is externally connected through the oil inlet hose to inject oil seal oil into the oil tank to achieve oil seal oil filling; The input end of the cooling pipeline is connected to the solenoid valve A, and the output end thereof is detachably connected to the oil return socket. A heat sink is installed in the cooling pipeline, and a one-way valve B is connected in series in the cooling pipeline at the front end of the heat sink. The heat sink is used to cool the oil seal oil in the oil tank to achieve temperature reduction and cooling. The output end of the nitrogen-filled and oil-removing pipeline is connected to the main pipeline of the output end of the one-way valve A, the charging joint is installed at the input end of the nitrogen-filled and oil-removing pipeline, and a one-way valve C is also installed in the nitrogen-filled and oil-removing pipeline. The charging joint is connected to an external nitrogen source to discharge the oil in the engine to be oil-sealed, thereby realizing nitrogen-filled and oil-removing.

[0007] Furthermore, an oil sealing method for an aircraft engine according to the present invention is adopted, and an oil filter device is also installed in the main pipeline, and the oil filter device includes a filter A and a filter B, and the filter A and the filter B are both stainless steel filter mesh filters, and the filter element thereof is a stainless steel mesh with a filtration accuracy of 5 μm; wherein the filter A is installed on the main pipeline between the solenoid valve A and the throttle valve, and the filter B is installed on the main pipeline between the oil pump and the solenoid valve B; The input end of the oil inlet pipeline is connected to the main pipeline between the filter A and the throttle valve, and the output end of the oil inlet hose is connected to the main pipeline between the solenoid valve B and the filter B. A control valve is also installed at the input end of the oil inlet hose. The control valve is a ball valve, and a refueling connector is configured in the ball valve. The oil inlet hose is connected to an oil source for oil seals through the refueling connector. Under the action of the oil pump, oil seal oil is injected into the oil tank through the oil inlet pipeline; wherein, the solenoid valve A and the solenoid valve B both adopt two-position three-way explosion-proof solenoid valves.

[0008] Furthermore, in an oil sealing method for an aircraft engine described in the present invention, a control valve is also installed in the main pipeline, the control valve is a sampling valve, and the sampling valve is installed on the main pipeline at the output end of the one-way valve A; the nitrogen filling and oil removal pipeline is connected to the main pipeline at the rear end of the sampling valve.

[0009] Furthermore, an oil sealing method for an aircraft engine described in the present invention is adopted, and an air filter device and two control valves are sequentially connected in series in the nitrogen filling and oil removal pipeline along the gas flow direction, and the two control valves are respectively a pressure reducing valve and a reversing valve, and the pressure reducing valve and the reversing valve are sequentially installed in the nitrogen filling and oil removal pipeline along the gas flow direction, and an external nitrogen source is connected through the charging joint, and the nitrogen in the nitrogen source passes through the air filter device, the pressure reducing valve, the reversing valve and the one-way valve C in sequence, and is finally connected to the engine to be oil-sealed through a quick-change joint, and the nitrogen transported by the nitrogen filling and oil removal pipeline is used to discharge the oil in the engine to be oil-sealed, so as to realize nitrogen filling and oil removal of the engine to be oil-sealed; wherein, the air filter device adopts a gas filter, and the reversing valve adopts a two-position two-way electromagnetic reversing valve.

[0010] Furthermore, an oil sealing method for an aircraft engine described in the present invention is adopted, wherein the heating device is a heating tube, and the heating tube is composed of three groups of annular heating tubes connected in parallel, and the three groups of heating tubes are arranged in parallel in the middle and lower part of the inner wall of the oil tank; the heat dissipation device is a radiator, and the radiator includes heat dissipation fins and a convection fan located on one side of the heat dissipation fins, and the radiator is installed in a cooling pipeline connected to the solenoid valve A, and a cooling pipe joint is provided in the cooling pipeline at the output end of the one-way valve B, and the cooling pipeline is detachably connected to the return oil socket through the cooling pipe joint, and the radiator is used to cool the oil seal oil in the oil tank.

[0011] Furthermore, an oil sealing method for an aircraft engine described in the present invention is adopted, the hydraulic control system also includes a pressure relief pipeline communicated with the main pipeline, the pressure relief pipeline includes a first pressure relief pipeline and a second pressure relief pipeline, the inlet end of the first pressure relief pipeline is connected to the main pipeline at the outlet end of the oil pump, and the inlet end of the second pressure relief pipeline is connected to the main pipeline at the output end of the throttle valve, and pressure relief pipe joints are provided at the outlet ends of the first pressure relief pipeline and the second pressure relief pipeline, the first pressure relief pipeline and the second pressure relief pipeline are detachably connected to the return oil socket through corresponding pressure relief pipe joints; a control valve is installed in the first pressure relief pipeline and the second pressure relief pipeline respectively, the control valve is a relief valve, and the relief valve includes a first relief valve and a second relief valve; wherein the first relief valve is installed in the first pressure relief pipeline, and the second relief valve is installed in the second pressure relief pipeline.

[0012] Furthermore, an oil sealing method for an aircraft engine described in the present invention is adopted, wherein the vehicle body assembly includes a frame body, two fixed wheels and two universal wheels installed at the bottom of the frame body, and a normally open door and a maintenance door arranged on the side of the frame body, and a traction rod is also installed at the front end of the frame body; the hydraulic control system is installed in the frame body, and a control valve is arranged at the bottom of the oil tank, and the control valve is an oil drain ball valve, which is used to drain the residual oil seal oil in the oil tank.

[0013] Furthermore, using the oil sealing method for aircraft engines described in the present invention, the ground power oil sealing device also includes an electrical control system installed in the vehicle body assembly, the electrical control system includes a power supply system, a control system, a collection system and an operation panel, the power supply system is electrically connected to the control system, the collection system and the operation panel respectively, and is used to provide working power to the control system, the collection system and the operation panel; wherein, The acquisition system includes an integrator and sensors, the sensors include a pressure sensor, a temperature sensor, a liquid level sensor and a flow sensor, the pressure sensor, the temperature sensor, the liquid level sensor and the flow sensor are electrically connected to the integrator respectively, the pressure sensor includes a first pressure sensor arranged in the main pipe at the outlet position of the solenoid valve A, and a second pressure sensor arranged in the main pipe at the outlet position of the check valve A; the temperature sensor and the liquid level sensor are respectively installed in the oil tank; and the flow sensor is installed in the main pipe between the check valve A and the throttle valve; The acquisition system detects the oil state and the oil seal state in real time through a pressure sensor, a temperature sensor, a liquid level sensor and a flow sensor, and feeds back to the control system through an integrator. The control system controls the oil pump, the heating device, the heat dissipation device and the control valve through the feedback value of the acquisition system; The control system includes a manual control system, a programmable PLC control system and a switching module. The manual control system and the programmable PLC control system can be switched to a manual or automatic mode through the switching module. The control system is respectively connected to the oil pump, the heating device, the heat dissipation device and the control valve; The operation panel includes a human-computer interaction touch interface, an operation switch, an integrator display screen, an indicator light and an audible and visual alarm. The operation switch includes a power switch, an emergency stop button and a toggle switch. The integrator display screen is electrically connected to the integrator in the acquisition system. The control system is electrically connected to the operation panel. The human-computer interaction touch interface in the operation panel is used to display the feedback value of the acquisition system and perform human-computer interaction operations. The audible and visual alarm sends out audible and visual alarm prompts according to the feedback value of the acquisition system.

[0014] Furthermore, using the oil sealing method for an aircraft engine described in the present invention, in the process S1, the specific method of heating and then dehydrating the oil seal oil is: Connect the oil source to the refueling joint, inject the oil seal oil into the oil tank, power on the entire ground power oil seal equipment, press the operation switch on the operation panel, and perform the dehydration operation in manual or automatic mode under the control of the control system; The oil level sensor in the oil tank is used to monitor the oil level information, and the level value is fed back to the control system and displayed in the human-machine interactive touch interface of the operation panel; If the oil in the tank is insufficient and the liquid level is low, the sound and light alarm will sound an alarm and the heating device will not start; If there is enough oil in the tank and the water content of the oil does not meet the oil seal requirements, that is, the water content of the oil is greater than 300ppm, the heating device is started to heat the oil seal oil in the tank; the temperature sensor is used to monitor the oil temperature in the tank, and the monitoring value is fed back to the control system; when the oil temperature reaches the set value of 105℃, the heating device is turned off, the heating is stopped, and the water in the oil is evaporated by high temperature to ensure that the water content of the oil meets the oil seal requirements; at the same time, the indicator light flashes green to indicate that the oil is qualified, and the human-computer interactive touch interface prompts that the dehydration is completed; when the oil temperature exceeds 120℃, the indicator light flashes red, and an over-temperature alarm is issued through the sound and light alarm, and the temperature information is displayed on the human-computer interactive touch interface, and the heating device is disconnected at the same time; If the water content of the oil meets the oil seal requirements, that is, the water content of the oil is not more than 300ppm, the heating device is started to heat the oil seal oil in the oil tank to 40℃~80℃; In the process S2, the specific method for cooling the oil seal oil is: Press the operation switch on the operation panel and, under the control of the control system, perform the cooling operation in manual or automatic mode; The control system controls the solenoid valve A and the solenoid valve B to be in an open state; uses a liquid level sensor in the oil tank to monitor the oil level information; and uses a temperature sensor to monitor the oil temperature information in the oil tank, and feeds the monitoring value back to the control system and displays it on the human-computer interactive touch interface; If the oil level in the oil tank is low, the indicator light flashes yellow to indicate low oil level, and the oil temperature and level information are displayed on the human-machine interactive touch interface, and the oil pump and cooling device are not started; If the oil volume is sufficient and the oil temperature is ≤80℃, the indicator light flashes yellow to indicate that the oil temperature is low; the oil temperature is displayed on the human-machine interactive touch interface, and the oil pump and cooling device are not started; If the oil volume is sufficient and the oil temperature is greater than 80°C, start the oil pump, the heat sink and the one-way valve B, so that the oil in the oil tank passes through the solenoid valve A, the filter B, the oil pump, the solenoid valve B and the heat sink in sequence, and finally returns to the oil tank through the one-way valve B, realizing continuous circulation cooling. When the oil temperature in the oil tank is 40°C≤oil temperature≤80°C, turn off the oil pump and the heat sink, the indicator light flashes green to indicate that the cooling is completed, and the display on the human-machine interactive touch interface shows that the cooling is completed; In the process S3, the specific method of oil sealing the oil-sealed engine is as follows: Press the operation switch on the operation panel and operate the oil seal in manual or automatic mode under the control of the control system; The control system controls the solenoid valve A and the solenoid valve B to be in an open state; The oil level information is monitored by using the level sensor in the oil tank; the oil temperature in the oil tank is monitored by using the temperature sensor; the oil pressure in the main pipeline is monitored by using the first pressure sensor and the second pressure sensor, and the monitoring values ​​are fed back to the control system; at the same time, they are displayed on the human-computer interactive touch interface; If the oil level in the oil tank is low, the indicator light flashes yellow to indicate the low oil level; the oil level information is displayed on the human-machine interactive touch interface, and the oil pump does not start; When the oil volume is sufficient and the oil temperature is less than 40°C or greater than 80°C, the indicator light flashes yellow to indicate abnormal oil temperature, and the oil temperature is displayed on the human-machine interactive touch interface, but the oil pump does not start; When the oil volume is sufficient and the oil temperature is between 40℃≤≤80℃, insert the quick-release connector into the engine oil filling port, start the oil pump, throttle valve and one-way valve A, and allow the oil in the fuel tank to pass through the solenoid valve A, filter B, oil pump, solenoid valve B, filter A and throttle valve in sequence, and then enter the oil filling hose through the one-way valve A, and finally be injected into the engine through the quick-release connector to complete the oil sealing operation.

[0015] Furthermore, using the oil sealing method for an aircraft engine according to the present invention, in the process S1, the specific method of injecting the oil sealing oil into the oil tank is: Press the operating switch on the operating panel and, under the control of the control system, perform refueling in manual or automatic mode; The control system controls the solenoid valve A and the solenoid valve B to be in an open state; First, connect the oil barrel to the refueling joint, start the oil pump and ball valve, and let the oil in the oil barrel pass through the ball valve, oil inlet hose, filter B, oil pump, solenoid valve B and filter A in sequence, and finally be injected into the oil tank through the oil inlet pipeline and solenoid valve A until the injected oil reaches the liquid level requirement, thereby realizing the refueling operation of the oil tank; Meanwhile, in the process S1, before the oil seal oil is heated and dehydrated, if the oil quality of the oil seal oil in the oil tank does not meet the oil seal requirements, the oil seal oil needs to be filtered and cleaned. The specific method of the filtering and cleaning process is: Press the operation switch on the operation panel and, under the control of the control system, perform the filter cleaning operation in manual or automatic mode; The control system controls the solenoid valve A and the solenoid valve B to be in an open state; First, insert the quick-release connector into the oil return socket, start the oil pump, throttle valve and check valve A, so that the oil in the oil tank passes through the solenoid valve A, filter B, oil pump, solenoid valve B, filter A, throttle valve and check valve A in sequence, and finally flows back to the oil tank through the oil filling hose. Through continuous circulation filtration, until the oil quality of the oil seal oil meets the oil seal requirements, use the filter B and filter A in the main line to achieve self-circulation filtration and cleaning of the oil seal oil in the oil tank; In addition, in the process S3, before the oil-sealed engine is oil-sealed, if the original oil-sealing oil in the engine does not meet the requirements, it is necessary to discharge the original oil-sealing oil in the engine to be oil-sealed to avoid mixing the injected oil-sealing oil with the original oil-sealing oil, thereby affecting the engine. The oil in the engine to be oil-sealed is discharged by nitrogen filling and deoiling. The specific method of nitrogen filling and deoiling is: Press the operation switch on the operation panel and, under the control of the control system, perform nitrogen filling and oil removal operation in manual or automatic mode; The control system controls the one-way valve C, the reversing valve and the pressure reducing valve to be in an open state; First, insert the quick-release joint into the engine to be oil-sealed, then connect the nitrogen source externally through the inflation joint, and finally start the external nitrogen source, so that the nitrogen in the nitrogen source passes through the air filter device, the pressure reducing valve, the reversing valve and the one-way valve C in the air injection pipeline in turn, and finally is injected into the engine through the quick-release joint in the oil injection hose, so as to discharge the oil in the engine to be oil-sealed and realize nitrogen filling and oil removal.

[0016] Compared with the prior art, the oil sealing method for aircraft engines described in the present invention has the following beneficial effects: through the configured ground power oil sealing equipment, the hydraulic control system and the electrical control system can be installed in the vehicle body assembly, which can meet the oil sealing work of the engine on the ground, without the need to be performed on the test bench or the aircraft, thereby reducing the oil sealing cost and cycle; at the same time, through the configured electrical control system, real-time measurement and intelligent control of pressure and temperature are realized, which greatly improves the working efficiency of ground oil sealing of aircraft engines. It can be seen that the oil sealing method described in the present invention can meet the needs of ground oil sealing of aircraft engines by configuring the vehicle body assembly, and through the hydraulic control system and the electrical control system installed in the vehicle body assembly, it can not only meet the requirements of self-circulation filtration and cleaning, heating and dehydration, cooling and oil sealing of oil seals, but also meet the requirements of nitrogen filling and oil removal, which greatly improves the convenience and maintenance efficiency of maintenance personnel, reduces work intensity and oil sealing costs, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the connection of various components in the ground power oil seal device of the present invention; Figure 2 It is a schematic block diagram of the structure of the electrical control system of the present invention; Figure 3 It is a power supply principle diagram of the power supply system described in the present invention; Figure 4 is a control flow chart of the acquisition system described in the present invention; Figure 5 It is an electrical control principle diagram of the electrical control system of the present invention; Figure 6 is a flow chart of the oil sealing process of the control system in the automatic mode of the present invention; Figure 7 It is a layout structure diagram of the human-computer interaction interface described in the present invention; Figure 8 It is a panel structure diagram of the display screen of the integrator described in the present invention; Fig. 9 It is the real object of the vehicle body assembly described in the present invention Figure 1 ; Fig.10 It is the real object of the vehicle body assembly described in the present invention Figure 2 ; Fig.11 It is the real object of the vehicle body assembly described in the present invention Figure 3 ; Fig.12 It is the real object of the vehicle body assembly described in the present invention Figure 4 .

[0019] As shown in the figure: 1-quick-change connector, 2-oil filling hose, 3-second pressure sensor, 4-sampling valve, 5-check valve A, 6-flow sensor, 7-second relief valve, 8-throttle valve, 9-filter A, 10-heat dissipation device, 11-first pressure sensor, 12-solenoid valve A, 13-check valve B, 14-oil pump, 15-first relief valve, 16-filter B, 17-ball valve, 18-oil inlet hose, 19-oil return socket, 20-solenoid valve B, 21-oil tank, 23-check valve C, 24-reversing valve, 25-pressure reducing valve, 26-air filter device, 27-inflating connector. DETAILED DESCRIPTION

[0020] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0021] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0024] like Figures 1 to 12 As shown, the present invention provides an oil sealing method for an aircraft engine, wherein the oil sealing method uses a ground power oil sealing device to seal the engine to be oil-sealed, and includes the following process: S1. Dehydrating the oil seal oil after heating; S2. Cooling the oil seal oil; S3. Oil seal the oil-sealed engine.

[0025] Specific combination Figure 1 , Figures 9 to 12As shown, the ground power oil seal equipment includes a vehicle body assembly and a hydraulic control system installed in the vehicle body assembly, the vehicle body assembly includes a vehicle frame, two fixed wheels and two universal wheels installed at the bottom of the vehicle frame, and a normally open door and a maintenance door arranged on the side of the vehicle frame, and a traction rod is also installed at the front end of the vehicle frame; the hydraulic control system includes an oil tank 21, an oil pump 14, a quick-change joint 1, an oil filling hose 2, an oil inlet hose 18, an air charging joint 27 and a control valve, and the control valve includes a solenoid valve, a one-way valve and a throttle valve 8; and a heating device for heating and dehydrating the oil seal oil is provided in the oil tank 21, and a control valve is provided at the bottom of the oil tank 21, and the control valve is an oil drain ball valve 22, through which the residual oil seal oil in the oil tank 21 is drained; The outlet end of the oil tank 21 is provided with a main pipeline, and the inlet end of the oil tank 21 is provided with an oil return socket 19, and in the main pipeline, a solenoid valve A12, a solenoid valve B20, a throttle valve 8 and a one-way valve A5 are sequentially connected in series along the conveying direction of the oil seal oil, the oil pump 14 is installed on the main pipeline between the solenoid valve A12 and the solenoid valve B20, the quick-change connector 1 is installed on the output end of the oil injection hose 2, the input end of the oil injection hose 2 is connected to the main pipeline of the output end of the one-way valve A5, the quick-change connector 1 is detachably connected to the engine to be oil-sealed or the oil return socket 19, and the quick-change connector 1 is used to realize oil sealing of the engine to be oil-sealed, or realize self-circulation filtration and cleaning of the oil seal oil in the oil tank 21; The hydraulic control system also includes an oil inlet pipeline, a cooling pipeline and a nitrogen filling and oil removal pipeline which are in communication with the main pipeline, wherein: The input end of the oil inlet pipeline is connected to the main pipeline between the solenoid valve A12 and the throttle valve 8, and the output end thereof is connected to the solenoid valve B20. The oil inlet hose 18 is connected to the oil inlet pipeline through the oil pump 14. The oil source for oil seal is externally connected through the oil inlet hose 18 to inject oil seal oil into the oil tank 21 to realize oil seal oil filling. The input end of the cooling pipeline is connected to the solenoid valve A12, and the output end thereof is detachably connected to the oil return socket 19. A heat sink 10 is installed in the cooling pipeline, and a one-way valve B13 is connected in series in the cooling pipeline at the front end of the heat sink 10. The heat sink 10 is used to cool the oil seal oil in the oil tank 21 to achieve temperature reduction and cooling. The output end of the nitrogen-filled and oil-removing pipeline is connected to the main pipeline of the output end of the one-way valve A5, the charging connector 27 is installed at the input end of the nitrogen-filled and oil-removing pipeline, and a one-way valve C23 is also installed in the nitrogen-filled and oil-removing pipeline. The charging connector 27 is connected to an external nitrogen source to discharge the oil in the engine to be oil-sealed to achieve nitrogen-filled and oil-removing; wherein the solenoid valve A12 and the solenoid valve B20 both adopt two-position three-way explosion-proof solenoid valves, and the two-position three-way explosion-proof solenoid valves include PA and PB output ends.

[0026] Furthermore, an oil sealing method for an aircraft engine according to the present invention is adopted, and an oil filter device is also installed in the main pipeline, and the oil filter device includes a filter A9 and a filter B16, and the filter A9 and the filter B16 are both stainless steel filter mesh filters, and the filter element thereof is a stainless steel mesh with a filtration accuracy of 5 μm; wherein the filter A9 is installed on the main pipeline between the solenoid valve A12 and the throttle valve 8, and the filter B16 is installed on the main pipeline between the oil pump 14 and the solenoid valve B20; The input end of the oil inlet pipeline is connected to the main pipeline between the filter A9 and the throttle valve 8, and the output end of the oil inlet hose 18 is connected to the main pipeline between the solenoid valve B20 and the filter B16. A control valve is also installed at the input end of the oil inlet hose 18. The control valve is a ball valve 17, and a refueling connector is configured in the ball valve 17. The oil inlet hose 18 is connected to an oil source for oil seals through the refueling connector. Under the action of the oil pump 14, the oil is used to inject oil seal oil into the oil tank 21 through the oil inlet pipeline; wherein the solenoid valve A12 and the solenoid valve B20 both adopt two-position three-way explosion-proof solenoid valves.

[0027] Furthermore, in the oil sealing method of the present invention, a control valve is further installed in the main pipeline, and the control valve is a sampling valve 4, which is installed on the main pipeline at the output end of the one-way valve A5; the nitrogen filling and oil removal pipeline is connected to the main pipeline at the rear end of the sampling valve 4. The sampling valve 4 installed on the main pipeline facilitates sampling and testing of the oil seal oil in the oil tank 21.

[0028] Furthermore, the oil sealing method described in the present invention is adopted, and an air filter device 26 and two control valves are sequentially connected in series in the nitrogen filling and oil removal pipeline along the gas flow direction. The two control valves are a pressure reducing valve 25 and a reversing valve 24, respectively. The pressure reducing valve 25 and the reversing valve 24 are sequentially installed in the nitrogen filling and oil removal pipeline along the gas flow direction, and an external nitrogen source is connected through the charging connector 27. The nitrogen in the nitrogen source sequentially passes through the air filter device 26, the pressure reducing valve 25, the reversing valve 24 and the one-way valve C23, and is finally connected to the engine to be oil-sealed through the quick-change connector 1. The nitrogen transported by the nitrogen filling and oil removal pipeline is used to discharge the oil in the engine to be oil-sealed, thereby realizing nitrogen filling and oil removal of the engine to be oil-sealed; wherein, the air filter device 26 adopts a gas filter, and the reversing valve 24 adopts a two-position two-way electromagnetic reversing valve. Through the reserved inflation joint 27, an air filter device 26 is provided at the front end of the air connection, and the air filter device 26 is used to filter possible solid particulate impurities. The pressure in the nitrogen filling and oil removal pipeline mainly comes from the external air pump or gas cylinder. In order to meet the engine nitrogen filling and oil removal pressure requirements (0.85MPa~0.95MPa), a pressure reducing valve 25 and a reversing valve 24 are also installed in the nitrogen filling and oil removal pipeline. This can meet the need for pressure regulation. When the pressure meets the requirements, nitrogen is injected into the engine through the quick-change joint 1, and the nitrogen filling and oil removal work can be completed in 10 to 15 seconds; therefore, the time can be controlled in this range.

[0029] Furthermore, the oil sealing method described in the present invention is adopted, and the heating device is a heating tube, and the heating tube is composed of three groups of annular heating tubes in parallel, and the three groups of heating tubes are arranged in parallel in the middle and lower part of the inner wall of the oil tank 21. The three groups of annular heating tubes composed of parallel connection can be heated together or individually, so that a heating source can be effectively and evenly provided for the oil; the heat dissipation device 10 is a radiator, and the radiator includes heat dissipation fins and a convection fan located on one side of the heat dissipation fins. The radiator is installed in a cooling pipeline connected to the solenoid valve A12, and a cooling pipe joint is provided in the cooling pipeline at the output end of the one-way valve B13, and the cooling pipeline is detachably connected to the return oil socket 19 through the cooling pipe joint, and the radiator is used to cool the oil seal oil in the oil tank 21.

[0030] Further, using the oil sealing method described in the present invention, the hydraulic control system also includes a pressure relief pipeline connected to the main pipeline, the pressure relief pipeline includes a first pressure relief pipeline and a second pressure relief pipeline, the inlet end of the first pressure relief pipeline is connected to the main pipeline at the outlet end of the oil pump 14, and the inlet end of the second pressure relief pipeline is connected to the main pipeline at the output end of the throttle valve 8, and pressure relief pipe joints are provided at the outlet ends of the first pressure relief pipeline and the second pressure relief pipeline, and the first pressure relief pipeline and the second pressure relief pipeline are detachably connected to the return oil socket 19 through corresponding pressure relief pipe joints; a control valve is installed in the first pressure relief pipeline and the second pressure relief pipeline respectively, the control valve is a relief valve, and the relief valve includes a first relief valve 15 and a second relief valve 7; wherein, the first relief valve 15 is installed in the first pressure relief pipeline, and the second relief valve 7 is installed in the second pressure relief pipeline. Through the two sets of pressure relief pipelines, when the pressure in the main pipeline exceeds a preset value during oil sealing of the engine, the pressure is relieved through the relief valve, and the oil seal oil after pressure relief flows back into the oil tank 21 without leaking out.

[0031] Specific combination Figures 2 to 8 As shown, using the oil sealing method of the present invention, the ground power oil sealing device also includes an electrical control system installed in the vehicle body assembly, the electrical control system includes a power supply system, a control system, a collection system and an operation panel, the power supply system is electrically connected to the control system, the collection system and the operation panel respectively, and is used to provide working power to the control system, the collection system and the operation panel; wherein, The acquisition system includes an integrator and sensors, the sensors include a pressure sensor, a temperature sensor, a liquid level sensor and a flow sensor 6, the pressure sensor, the temperature sensor, the liquid level sensor and the flow sensor 6 are electrically connected to the integrator respectively, the pressure sensor includes a first pressure sensor 11 arranged in the main pipe at the outlet position of the solenoid valve A12, and a second pressure sensor 3 arranged in the main pipe at the outlet position of the check valve A5; the temperature sensor and the liquid level sensor are respectively installed in the oil tank 21; and the flow sensor 6 is installed in the main pipe between the check valve A5 and the throttle valve 8; The acquisition system detects the oil seal oil state and the oil seal state in real time through the pressure sensor, temperature sensor, liquid level sensor and flow sensor 6, and feeds back to the control system, and the control system controls the oil pump 14, the heating device, the heat sink 10 and the control valve through the feedback value of the acquisition system; The control system includes a manual control system, a programmable PLC control system and a switching module. The manual control system and the programmable PLC control system can be switched to a manual or automatic mode through the switching module. The control system is respectively connected to the oil pump 14, the heating device, the heat dissipation device 10 and the control valve control; The operation panel includes a human-machine interactive touch interface, an operation switch, an integrator display screen, an indicator light, and an audible and visual alarm. The operation switch includes a power switch, an emergency stop button, and a toggle switch. The integrator display screen is electrically connected to the pressure sensor, temperature sensor, liquid level sensor, and flow sensor 6 in the acquisition system. The control system is electrically connected to the operation panel. The human-machine interactive touch interface in the operation panel is used to display the feedback value of the acquisition system and perform human-machine interactive operations. The audible and visual alarm issues an audible and visual alarm prompt according to the feedback value of the acquisition system. Among them, the human-machine interactive touch interface is used as a human-machine interactive touch interface to display the feedback value of the acquisition system and perform human-machine interactive operations. An audible and visual alarm can be set next to the human-machine interactive touch interface. The human-machine interactive touch interface is located on the top side of the frame body so that the operator can monitor the equipment parameters and engine status at the same time to improve the efficiency and safety of the oil seal.

[0032] Using the oil sealing method of the present invention, in a specific application process, such as Figure 2 and Figure 3 As shown, since the power supply system provides power support and protection for the entire power system oil seal equipment, this power supply system adopts a three-phase three-wire 380V / 50HZ AC power supply. The switching power supply converts AC380V into DC24V control power supply. The power supply system has functions such as phase loss protection, overload protection and automatic phase change protection. This can ensure the normal operation of the system, enable smooth transmission of electric energy, and normal operation of the electrical system. At the same time, separate grounding protection is adopted in the circuit, and the electrical system is connected to the power connector to achieve shielding grounding and protective grounding of the electrical system to prevent interference caused by circuit operation from affecting the performance of the equipment and damaging the electrical system; the metal shell of the vehicle body is provided with a grounding column, and the grounding column is equipped with a grounding mark. Protective grounding is achieved by connecting an external grounding wire to the grounding pile to avoid circuit aging causing the vehicle body to be electrified and electric shock accidents. As shown Figure 4 As shown, the acquisition system consists of an integrator and temperature sensors, pressure sensors, flow sensors, and flow sensors, etc. The sensor transmits the relevant collected current signal input to the integrator, and the integrator then transmits the data to the programmable PLC controller to complete the data information acquisition.

[0033] In addition, if Figure 5 As shown in the figure, the control system uses a programmable controller as the brain, which is responsible for electrical system control and calculation functions. The acquisition system includes pressure sensors, temperature sensors and flow sensors, which are responsible for collecting parameters such as temperature and pressure required by the system and communicating the parameters to the control system. The operation panel can display various system information in real time, including control mode and working status.

[0034] The control system is powered by DC24v, with a programmable controller as the central processing unit, controlling the peripheral I / O modules and communicating with the instrument to achieve the following functions of the equipment: Power-on self-test: The device has the function of automatically detecting faults.

[0035] Automatic / Manual: It has two modes: manual mode and automatic mode. Automatic: When the equipment is in automatic mode, it can realize the "one-button oil seal" function. Manual: When the equipment is in manual mode, it can realize the functions of oil tank heating, oil filtration cycle, oil heating and water removal, oil heat dissipation, oil sealing and nitrogen filling and oil removal.

[0036] Data collection function: including temperature, pressure, flow rate data, etc. The data is displayed in digital form, which is clear and easy to read.

[0037] Sound and light alarm function: alarm or fault prompt when the equipment temperature, oil pressure, or solenoid valve is working abnormally.

[0038] Emergency stop function: In any case, the power supply of the equipment will be cut off immediately and the equipment will stop working to prevent damage to the equipment or injury to personnel.

[0039] Since the control system has the function of automatically detecting whether the equipment circuits and components are faulty when powered on, when a fault is detected by self-detection, it can point out the fault point and provide troubleshooting tips.

[0040] The device realizes I / O port and line self-check by collecting I / O signals, and realizes system self-check data collection by judging whether the data format is correct through MODBUS communication with the collection instrument.

[0041] In the specific operation process, since the control system has two control modes, automatic / manual, the mode can be switched through the touch screen or the manual / automatic switch. When the manual / automatic switch is turned to the manual gear or the touch screen is clicked to switch to the manual mode, the equipment switches to the manual mode, and the touch screen working status bar displays the manual mode. In this mode, the switch functions such as the panel and touch screen oil seal switch and heating switch are effective. By enabling the switch, the corresponding actuators such as relays and contactors are driven to realize the equipment oil tank heating, oil filtration cycle, oil heating and water removal, oil heat dissipation, oil sealing, and nitrogen filling and oil removal functions.

[0042] like Figure 6 As shown, the automatic control mode can be adopted to realize the one-key oil seal operation of the equipment. The specific operation method is: In the process S1, the specific method of heating and then dehydrating the oil seal oil is as follows: Connect the oil source to the oil tank 21 through the refueling joint, inject the oil seal oil into the oil tank 21, and power on the entire ground power oil seal equipment, press the operation switch in the operation panel, and under the control of the control system, take manual or automatic mode to perform dehydration operation; The liquid level sensor in the oil tank 21 is used to monitor the oil level information, and the liquid level value is fed back to the control system and displayed in the human-machine interactive touch interface in the operation panel; If the oil in the oil tank 21 is insufficient and the liquid level is low, the sound and light alarm is controlled to issue an alarm, and the heating device is not started; If the oil in the oil tank 21 is sufficient and the water content of the oil does not meet the oil seal requirements, that is, the water content of the oil is greater than 300ppm, the heating device is started to heat the oil seal oil in the oil tank 21; the temperature sensor is used to monitor the oil temperature in the oil tank 21, and the monitoring value is fed back to the control system; when the oil temperature reaches the set value of 105℃, the heating device is turned off, the heating is stopped, and the high temperature is used to evaporate the water in the oil to ensure that the water content of the oil meets the oil seal requirements; at the same time, the indicator light flashes green to indicate that the oil is qualified, and the human-computer interactive touch interface prompts that the dehydration is completed; when the oil temperature exceeds 120℃, the indicator light flashes red, and an over-temperature alarm is issued through the sound and light alarm, and the temperature information is displayed on the human-computer interactive touch interface, and the heating device is disconnected at the same time; If the water content of the oil meets the oil seal requirement, that is, the water content of the oil is not greater than 300 ppm, the heating device is started to heat the oil seal oil in the oil tank 21 to heat the oil to 40°C to 80°C; In the process S2, the specific method for cooling the oil seal oil is: Press the operation switch on the operation panel and, under the control of the control system, perform the cooling operation in manual or automatic mode; The control system controls the solenoid valve A20 and the solenoid valve B12 to be in an open state; uses the liquid level sensor in the oil tank 21 to monitor the oil level information; and uses the temperature sensor to monitor the oil temperature information in the oil tank, and feeds the monitoring value back to the control system and displays it on the human-computer interactive touch interface; If the oil level in the oil tank 21 is low, the indicator light flashes yellow to indicate low oil level, and the oil temperature and oil level information are displayed on the human-machine interactive touch interface, and the oil pump 14 and the heat sink 10 are not started; If the oil volume is sufficient and the oil temperature is ≤80°C, the indicator light flashes yellow to indicate that the oil temperature is low; the oil temperature is displayed on the human-machine interactive touch interface, and the oil pump 14 and the heat dissipation device 10 are not started; If the oil volume is sufficient and the oil temperature is greater than 80°C, start the oil pump 14, the heat sink 10 and the one-way valve B13, so that the oil in the oil tank 21 passes through the PB end of the solenoid valve A20, the filter B16, the oil pump 14, the PB end of the solenoid valve B12 and the heat sink 10 in sequence, and finally returns to the oil tank 21 through the one-way valve B13, so as to achieve continuous circulation cooling. When the oil temperature in the oil tank 21 is 40°C≤oil temperature≤80°C, the oil pump 14 and the heat sink 10 are turned off, the indicator light flashes green to indicate that the cooling is completed, and the cooling completion is displayed on the human-machine interactive touch interface; In the process S3, the specific method of oil sealing the oil-sealed engine is as follows: Press the operation switch on the operation panel and operate the oil seal in manual or automatic mode under the control of the control system; The control system controls the solenoid valve A20 and the solenoid valve B12 to be in an open state; The oil level information is monitored by the level sensor in the oil tank 21; the oil temperature in the oil tank 21 is monitored by the temperature sensor, and the oil pressure of the main pipeline is monitored by the first pressure sensor 11 and the second pressure sensor 3, and the monitoring value is fed back to the control system; at the same time, it is displayed on the human-computer interactive touch interface; If the oil level in the oil tank 21 is low, the indicator light flashes yellow to indicate the low oil level; the oil level information is displayed on the human-machine interactive touch interface, and the oil pump 14 does not start; When the oil volume is sufficient and the oil temperature is less than 40°C or the oil temperature is greater than 80°C, the indicator light flashes yellow to indicate that the oil temperature is abnormal, and the oil temperature is displayed on the human-machine interactive touch interface, and the oil pump 14 does not start; When the oil quantity is sufficient and the oil temperature is between 40℃≤oil temperature≤80℃, insert the quick-release connector 1 into the engine oil filling port, start the oil pump 14, the throttle valve 8 and the one-way valve A5, so that the oil in the oil tank 21 passes through the PA end of the solenoid valve A20, the filter B16, the oil pump 14, the PB end of the solenoid valve B12, the filter A9 and the throttle valve 8 in turn, and then enters the oil filling hose 2 through the one-way valve A5, and finally is injected into the engine through the quick-release connector 1 to complete the oil sealing operation.

[0043] Furthermore, using the oil sealing method of the present invention, in the process S1, the specific method of injecting the oil sealing oil into the oil tank 21 is: Press the operating switch on the operating panel and, under the control of the control system, perform refueling in manual or automatic mode; The control system controls the solenoid valve A20 and the solenoid valve B12 to be in an open state; First, connect the oil barrel to the refueling joint, start the oil pump 14 and the ball valve 17, and let the oil in the oil barrel pass through the ball valve 17, the oil inlet hose 18, the filter B16, the oil pump 14, the PA end of the solenoid valve B12 and the filter A9 in sequence, and finally be injected into the oil tank 21 through the oil inlet pipeline and the PA end of the solenoid valve A20 until the injected oil reaches the liquid level requirement, thereby realizing the refueling operation of the oil tank 21.

[0044] Further, using the oil sealing method of the present invention, in the process S1, before the oil sealing oil is heated and dehydrated, if the oil quality of the oil sealing oil in the oil tank 21 does not meet the oil sealing requirements, the oil sealing oil needs to be filtered and cleaned. The specific method of the filtering and cleaning process is: Press the operation switch on the operation panel and, under the control of the control system, perform the filter cleaning operation in manual or automatic mode; The control system controls the solenoid valve A20 and the solenoid valve B12 to be in an open state; First, insert the quick-release connector 1 into the oil return socket 19, start the oil pump 14, the throttle valve 8 and the one-way valve A5, so that the oil in the oil tank 21 passes through the PB end of the solenoid valve A20, the filter B16, the oil pump 14, the PA end of the solenoid valve B12, the filter A9, the throttle valve 8 and the one-way valve A5 in sequence, and finally flows back to the oil tank 21 through the oil filling hose 2. Through continuous circulation filtration, until the oil quality of the oil seal oil meets the oil seal requirements, the filter B16 and the filter A9 in the main line are used to realize the self-circulation filtration and cleaning of the oil seal oil in the oil tank 21; In the specific application process, the oil seal oil adopts lubricating oil that meets the GJB420B-7 level. In order to ensure that the oil contamination of the lubricating oil at the outlet of the quick-release joint 1 is better than the GJB420B-7 level, the lubricating oil needs to be filtered. At the same time, in order to ensure that the equipment better meets various indicators and does not increase redundant repetitive structural design, a return oil socket 19 is specially designed to form a closed-loop structure with the oil tank 21, the oil pump 14, the oil filter device and the oil filling hose 2. The oil in the oil tank 21 is continuously filtered through circulation, thereby effectively ensuring that the lubricating oil contamination is better than the GJB420B-7 level requirement. At the same time, an oil sampling port is also provided on the main pipeline, and a sampling valve 4 is configured at the sampling port. The sampling valve 4 adopts the form of a knob ball valve, which can facilitate personnel operation and rapid sampling, and can also effectively prevent the oil in the oil tank from being contaminated by the outside world.

[0045] In addition, using the oil sealing method of the present invention, in the process S3, before the oil sealing of the engine to be oil-sealed, if the original oil sealing oil in the engine to be oil-sealed does not meet the requirements, it is necessary to discharge the original oil sealing oil in the engine to be oil-sealed to avoid mixing the injected oil sealing oil with the original oil sealing oil, thereby affecting the engine, and nitrogen filling and deoiling are adopted to discharge the oil in the engine to be oil-sealed. The specific method of nitrogen filling and deoiling is: Press the operation switch on the operation panel and, under the control of the control system, perform nitrogen filling and oil removal operation in manual or automatic mode; The control system controls the one-way valve C23, the reversing valve 24 and the pressure reducing valve 25 to be in an open state; First, insert the quick-release connector 1 into the engine to be oil-sealed, then connect the nitrogen source to the outside through the inflation connector 27, and finally start the external nitrogen source, so that the nitrogen in the nitrogen source passes through the air filter device 26, the pressure reducing valve 25, the reversing valve 24 and the one-way valve C23 in the air injection pipeline in turn, and finally is injected into the engine through the quick-release connector 1 in the oil injection hose 2, so as to discharge the oil in the engine to be oil-sealed and realize nitrogen filling and oil removal.

[0046] By adopting the oil sealing method of the present invention, the hydraulic control system and the electrical control system can be installed in the vehicle body assembly through the configured ground power oil sealing equipment, so as to realize the automation of the whole oil sealing process. The whole system is highly integrated and designed as a whole, and multiple functions are realized synchronously. The real-time measurement and intelligent control of pressure and temperature are realized through the acquisition system and the control system, and the measured temperature, pressure and flow are displayed. In addition, when recording and collecting the operation process data of the oil sealing device, if an abnormality is found, an alarm prompt can be given in time through the indicator light and the sound and light alarm, which greatly improves the safety. At the same time, it can also be operated in manual or automatic mode. Through the automatic mode, one-button oil sealing operation can be realized, which greatly improves the working efficiency of ground oil sealing of aircraft engines.

[0047] In addition, the oil sealing method described in the present invention, various control valves installed in the main pipeline, various sensors used in the collection system, and heating devices, heat dissipation devices, pipe joints and other equipment are all commonly used equipment in the prior art and can be directly purchased on the existing market without involving any changes to their structures. They are applied to the present invention for the purpose of achieving convenient control, and therefore there are no requirements for their specific models or specifications, as long as they match each other and meet the use requirements.

[0048] In summary, the oil sealing method described in the present invention can meet the needs of ground oil sealing of aircraft engines by configuring the body components, and through the hydraulic control system and electrical control system installed in the body components, not only can the oil seal oil self-circulation filtration and cleaning, heating dehydration, cooling and oil sealing requirements be met, but also the nitrogen filling and oil removal requirements can be achieved, which greatly improves the convenience and maintenance efficiency of maintenance personnel, reduces work intensity and oil sealing costs, and is suitable for promotion and application.

[0049] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0050] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the present invention and does not limit the present invention. Any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. An oil sealing method for an aircraft engine, characterized in that: The oil sealing method uses ground power oil sealing equipment to seal the engine to be oil sealed, including the following process: S1. Dehydrating the oil seal oil after heating; S2. Cooling the oil seal oil; S3. Oil seal the oil-sealed engine; The ground power oil seal device comprises a vehicle body component and a hydraulic control system installed in the vehicle body component, wherein the hydraulic control system comprises an oil tank (21), an oil pump (14), a quick-change joint (1), an oil injection hose (2), an oil inlet hose (18), an air charging joint (27) and a control valve, wherein the control valve comprises a solenoid valve, a check valve and a throttle valve (8); and a heating device for heating and dehydrating the oil seal oil is provided in the oil tank (21); The outlet end of the oil tank (21) is provided with a main pipeline, and the inlet end of the oil tank (21) is provided with an oil return socket (19), and in the main pipeline, a solenoid valve A (12), a solenoid valve B (20), a throttle valve (8) and a check valve A (5) are sequentially connected in series along the conveying direction of the oil seal oil, the oil pump (14) is installed on the main pipeline between the solenoid valve A (12) and the solenoid valve B (20), the quick-change connector (1) is installed on the output end of the oil injection hose (2), the input end of the oil injection hose (2) is connected to the main pipeline of the output end of the check valve A (5), the quick-change connector (1) is detachably connected to the engine to be oil-sealed or the oil return socket (19), and the quick-change connector (1) is used to realize oil sealing of the engine to be oil-sealed, or to realize self-circulation filtration and cleaning of the oil seal oil in the oil tank (21); The hydraulic control system also includes an oil inlet pipeline, a cooling pipeline and a nitrogen filling and oil removal pipeline which are in communication with the main pipeline, wherein: The input end of the oil inlet pipeline is connected to the main pipeline between the solenoid valve A (12) and the throttle valve (8), and the output end is connected to the solenoid valve B (20). The oil inlet hose (18) is connected to the oil inlet pipeline through the oil pump (14). The oil source for oil seal is connected to the oil inlet hose (18) to inject oil seal oil into the oil tank (21) to achieve oil seal oil filling. The input end of the cooling pipeline is connected to the electromagnetic valve A (12), and the output end thereof is detachably connected to the oil return socket (19). A heat sink (10) is installed in the cooling pipeline, and a one-way valve B (13) is connected in series in the cooling pipeline at the front end of the heat sink (10). The heat sink (10) is used to cool the oil seal in the oil tank (21) to achieve temperature reduction and cooling. The output end of the nitrogen-filled deoiling pipeline is connected to the main pipeline of the output end of the one-way valve A (5), the gas charging connector (27) is installed at the input end of the nitrogen-filled deoiling pipeline, and a one-way valve C (23) is also installed in the nitrogen-filled deoiling pipeline. The gas charging connector (27) is connected to an external nitrogen source to discharge the oil in the engine to be oil-sealed, thereby realizing nitrogen-filled deoiling.

2. The oil sealing method for an aircraft engine according to claim 1, characterized in that: An oil filter device is also installed in the main pipeline, and the oil filter device includes a filter A (9) and a filter B (16). The filter A (9) and the filter B (16) are both stainless steel filter mesh filters, and their filter elements are stainless steel mesh with a filtration accuracy of 5 μm. The filter A (9) is installed on the main pipeline between the solenoid valve A (12) and the throttle valve (8), and the filter B (16) is installed on the main pipeline between the oil pump (14) and the solenoid valve B (20). The input end of the oil inlet pipeline is connected to the main pipeline between the filter A (9) and the throttle valve (8), and the output end of the oil inlet hose (18) is connected to the main pipeline between the solenoid valve B (20) and the filter B (16). A control valve is also installed at the input end of the oil inlet hose (18), and the control valve is a ball valve (17). A refueling connector is arranged in the ball valve (17). The oil inlet hose (18) is connected to an oil source for oil seals through the refueling connector. Under the action of the oil pump (14), oil seal oil is injected into the oil tank (21) through the oil inlet pipeline. The solenoid valve A (12) and the solenoid valve B (20) are both two-position three-way explosion-proof solenoid valves.

3. The oil sealing method for an aircraft engine according to claim 2, characterized in that: A control valve is also installed in the main pipeline. The control valve is a sampling valve (4). The sampling valve (4) is installed on the main pipeline at the output end of the one-way valve A (5). The nitrogen filling and oil removal pipeline is connected to the main pipeline at the rear end of the sampling valve (4).

4. The oil sealing method for an aircraft engine according to claim 3, characterized in that: In the nitrogen filling and oil removal pipeline, an air filter device (26) and two control valves are sequentially connected in series along the gas flow direction. The two control valves respectively include a pressure reducing valve (25) and a reversing valve (24). The pressure reducing valve (25) and the reversing valve (24) are sequentially installed in the nitrogen filling and oil removal pipeline along the gas flow direction. An external nitrogen source is connected through the air filling joint (27). Nitrogen in the nitrogen source sequentially passes through the air filter device (26), the pressure reducing valve (25), the reversing valve (24) and the one-way valve C (23), and is finally connected to the engine to be oil-sealed through the quick-change joint (1). The nitrogen transported by the nitrogen filling and oil removal pipeline is used to discharge the oil in the engine to be oil-sealed, thereby achieving nitrogen filling and oil removal of the engine to be oil-sealed. The air filter device (26) adopts a gas filter, and the reversing valve (24) adopts a two-position two-way electromagnetic reversing valve.

5. The oil sealing method for an aircraft engine according to claim 1, characterized in that: The heating device is a heating tube, which is composed of three groups of annular heating tubes connected in parallel. The three groups of heating tubes are arranged in parallel at the middle and lower part of the inner wall of the oil tank (21); the heat dissipation device (10) is a radiator, which includes heat dissipation fins and a convection fan located on one side of the heat dissipation fins. The radiator is installed in a cooling pipeline connected to the solenoid valve A (12), and a cooling pipe joint is provided in the cooling pipeline at the output end of the one-way valve B (13). The cooling pipeline is detachably connected to the return oil socket (19) through the cooling pipe joint. The radiator is used to cool the oil seal oil in the oil tank (21).

6. The oil sealing method for an aircraft engine according to claim 1, characterized in that: The hydraulic control system also includes a pressure relief pipeline connected to the main pipeline, the pressure relief pipeline includes a first pressure relief pipeline and a second pressure relief pipeline, the inlet end of the first pressure relief pipeline is connected to the main pipeline at the outlet end of the oil pump (14), and the inlet end of the second pressure relief pipeline is connected to the main pipeline at the output end of the throttle valve (8), and pressure relief pipe joints are provided at the outlet ends of the first pressure relief pipeline and the second pressure relief pipeline, and the first pressure relief pipeline and the second pressure relief pipeline are detachably connected to the return oil socket (19) through corresponding pressure relief pipe joints; a control valve is installed in the first pressure relief pipeline and the second pressure relief pipeline respectively, the control valve is a relief valve, and the relief valve includes a first relief valve (15) and a second relief valve (7); wherein the first relief valve (15) is installed in the first pressure relief pipeline, and the second relief valve (7) is installed in the second pressure relief pipeline.

7. The oil sealing method for an aircraft engine according to claim 1, characterized in that: The vehicle body assembly comprises a vehicle frame, two fixed wheels and two universal wheels installed at the bottom of the vehicle frame, and a normally open door and a maintenance door arranged on the side of the vehicle frame, and a traction rod is also installed at the front end of the vehicle frame; the hydraulic control system is installed in the vehicle frame, and a control valve is arranged at the bottom of the oil tank (21), and the control valve is an oil drain ball valve (22), which is used to drain the residual oil seal oil in the oil tank (21).

8. An oil sealing method for an aircraft engine according to any one of claims 1 to 7, characterized in that: The ground power oil seal equipment also includes an electrical control system installed in the vehicle body assembly, the electrical control system includes a power supply system, a control system, a collection system and an operation panel, the power supply system is electrically connected to the control system, the collection system and the operation panel respectively, and is used to provide working power to the control system, the collection system and the operation panel; wherein, The acquisition system comprises an integrator and sensors, wherein the sensors comprise a pressure sensor, a temperature sensor, a liquid level sensor and a flow sensor (6), wherein the pressure sensor, the temperature sensor, the liquid level sensor and the flow sensor (6) are respectively electrically connected to the integrator, wherein the pressure sensor comprises a first pressure sensor (11) arranged in a main pipe at an outlet position of a solenoid valve A (12), and a second pressure sensor (3) arranged in a main pipe at an outlet position of a check valve A (5); the temperature sensor and the liquid level sensor are respectively installed in an oil tank (21); and the flow sensor (6) is installed in a main pipe between the check valve A (5) and a throttle valve (8); The acquisition system detects the oil state and the oil seal state in real time through a pressure sensor, a temperature sensor, a liquid level sensor and a flow sensor (6), and feeds back to the control system through an integrator. The control system controls the oil pump (14), the heating device, the heat dissipation device (10) and the control valve through the feedback value of the acquisition system; The control system comprises a manual control system, a programmable PLC control system and a switching module. The manual control system and the programmable PLC control system can be switched to a manual or automatic mode via the switching module. The control system is respectively connected to the oil pump (14), the heating device, the heat dissipation device (10) and the control valve; The operation panel includes a human-computer interaction touch interface, an operation switch, an integrator display screen, an indicator light and an audible and visual alarm. The operation switch includes a power switch, an emergency stop button and a toggle switch. The integrator display screen is electrically connected to the integrator in the acquisition system. The control system is electrically connected to the operation panel. The human-computer interaction touch interface in the operation panel is used to display the feedback value of the acquisition system and perform human-computer interaction operations. The audible and visual alarm sends out audible and visual alarm prompts according to the feedback value of the acquisition system.

9. The oil sealing method for an aircraft engine according to claim 8, characterized in that: In the process S1, the specific method of heating and then dehydrating the oil seal oil is as follows: An external oil source is connected to the refueling joint to inject oil seal oil into the oil tank (21), and the entire ground power oil seal device is powered on, and the operation switch in the operation panel is pressed, and under the control of the control system, a manual or automatic mode is adopted to perform the dehydration operation; Using a liquid level sensor in the oil tank (21) to monitor the oil level information, and feeding back the liquid level value to the control system, and displaying it in a human-machine interactive touch interface in the operation panel; If the oil in the oil tank (21) is insufficient and the liquid level is low, the sound and light alarm is controlled to sound an alarm and the heating device is not started; If the amount of oil in the oil tank (21) is sufficient and the water content of the oil does not meet the oil seal requirements, that is, the water content of the oil is greater than 300 ppm, the heating device is started to heat the oil seal oil in the oil tank (21); the temperature sensor is used to monitor the oil temperature in the oil tank (21), and the monitoring value is fed back to the control system; when the oil temperature reaches the set value of 105° C., the heating device is turned off, the heating is stopped, and the water in the oil is evaporated by high temperature to ensure that the water content of the oil meets the oil seal requirements; at the same time, the indicator light flashes green to indicate that the oil is qualified, and the human-machine interactive touch interface prompts that the dehydration is completed; when the oil temperature exceeds 120° C., the indicator light flashes red, and an over-temperature alarm is issued through the sound and light alarm, and the temperature information is displayed on the human-machine interactive touch interface, and the heating device is disconnected at the same time; If the water content of the oil meets the oil seal requirement, that is, the water content of the oil is not greater than 300 ppm, the heating device is started to heat the oil seal oil in the oil tank (21) until the oil is heated to 40°C to 80°C; In the process S2, the specific method for cooling the oil seal oil is: Press the operation switch on the operation panel and, under the control of the control system, perform the cooling operation in manual or automatic mode; The control system controls the electromagnetic valve A (20) and the electromagnetic valve B (12) to be in an open state; uses a liquid level sensor in the oil tank (21) to monitor the oil level information; and uses a temperature sensor to monitor the oil temperature information in the oil tank, and feeds the monitoring value back to the control system and displays it on the human-computer interactive touch interface; If the oil level in the oil tank (21) is low, the indicator light flashes yellow to indicate the low level, and the oil temperature and level information are displayed on the human-machine interactive touch interface, and the oil pump (14) and the heat dissipation device (10) are not started; If the oil volume is sufficient and the oil temperature is ≤80°C, the indicator light flashes yellow to indicate that the oil temperature is low; the oil temperature is displayed on the human-machine interactive touch interface, and the oil pump (14) and the heat dissipation device (10) are not started; If the oil volume is sufficient and the oil temperature is greater than 80°C, the oil pump (14), the heat sink (10) and the one-way valve B (13) are started, so that the oil in the oil tank (21) passes through the solenoid valve A (20), the filter B (16), the oil pump (14), the solenoid valve B (12) and the heat sink (10) in sequence, and finally returns to the oil tank (21) through the one-way valve B (13), so as to achieve continuous circulation cooling. When the oil temperature in the oil tank (21) is 40°C≤oil temperature≤80°C, the oil pump (14) and the heat sink (10) are turned off, the indicator light flashes green to indicate that the cooling is completed, and the cooling completion is displayed on the human-machine interactive touch interface; In the process S3, the specific method of oil sealing the oil-sealed engine is as follows: Press the operation switch on the operation panel and operate the oil seal in manual or automatic mode under the control of the control system; The control system controls the solenoid valve A (20) and the solenoid valve B (12) to be in an open state; The liquid level sensor in the oil tank (21) is used to monitor the oil level information; the temperature sensor is used to monitor the oil temperature in the oil tank (21); and the first pressure sensor (11) and the second pressure sensor (3) are used to monitor the oil pressure of the main pipeline, and the monitoring values ​​are fed back to the control system; at the same time, they are displayed on the human-machine interactive touch interface; If the oil level in the oil tank (21) is low, the indicator light flashes yellow to indicate the low oil level; the oil level information is displayed on the human-machine interactive touch interface, and the oil pump (14) does not start; When the oil volume is sufficient and the oil temperature is less than 40°C or the oil temperature is greater than 80°C, the indicator light flashes yellow to indicate that the oil temperature is abnormal, and the oil temperature is displayed on the human-machine interactive touch interface, and the oil pump (14) does not start; When the oil volume is sufficient and the oil temperature is 40°C≤oil temperature≤80°C, the quick-release joint (1) is inserted into the engine oil filling port, the oil pump (14), the throttle valve (8) and the one-way valve A (5) are started, and the oil in the oil tank (21) passes through the solenoid valve A (20), the filter B (16), the oil pump (14), the solenoid valve B (12), the filter A (9) and the throttle valve (8) in sequence, and then enters the oil filling hose (2) through the one-way valve A (5), and finally is injected into the engine through the quick-release joint (1), completing the oil sealing operation.

10. The oil sealing method for an aircraft engine according to claim 9, characterized in that: In the process S1, the specific method of injecting the oil seal oil into the oil tank (21) is as follows: Press the operating switch on the operating panel and, under the control of the control system, perform refueling in manual or automatic mode; The control system controls the solenoid valve A (20) and the solenoid valve B (12) to be in an open state; First, an oil barrel is connected to the refueling joint, and the oil pump (14) and the ball valve (17) are started, so that the oil in the oil barrel passes through the ball valve (17), the oil inlet hose (18), the filter B (16), the oil pump (14), the solenoid valve B (12) and the filter A (9) in sequence, and finally is injected into the oil tank (21) through the oil inlet pipeline and the solenoid valve A (20) until the injected oil reaches the liquid level requirement, thereby realizing the refueling operation of the oil tank (21); Meanwhile, in the process S1, before the oil seal oil is heated and dehydrated, if the oil quality of the oil seal oil in the oil tank (21) does not meet the oil seal requirements, the oil seal oil needs to be filtered and cleaned. The specific method of the filtering and cleaning process is as follows: Press the operation switch on the operation panel and, under the control of the control system, perform the filter cleaning operation in manual or automatic mode; The control system controls the solenoid valve A (20) and the solenoid valve B (12) to be in an open state; First, the quick-release connector (1) is inserted into the oil return socket (19), and the oil pump (14), the throttle valve (8) and the check valve A (5) are started, so that the oil in the oil tank (21) passes through the solenoid valve A (20), the filter B (16), the oil pump (14), the solenoid valve B (12), the filter A (9), the throttle valve (8) and the check valve A (5) in sequence, and finally flows back to the oil tank (21) through the oil filling hose (2), and is continuously circulated and filtered until the oil quality of the oil seal meets the oil seal requirements, and the filter B (16) and the filter A (9) in the main pipeline are used to realize self-circulation filtration and cleaning of the oil seal oil in the oil tank (21); In addition, in the process S3, before the oil-sealed engine is oil-sealed, if the original oil-sealing oil in the engine does not meet the requirements, it is necessary to discharge the original oil-sealing oil in the engine to be oil-sealed to avoid mixing the injected oil-sealing oil with the original oil-sealing oil, thereby affecting the engine. The oil in the engine to be oil-sealed is discharged by nitrogen filling and deoiling. The specific method of nitrogen filling and deoiling is: Press the operation switch on the operation panel and, under the control of the control system, perform nitrogen filling and oil removal operation in manual or automatic mode; The control system controls the one-way valve C (23), the reversing valve (24) and the pressure reducing valve (25) to be in an open state; First, the quick-release joint (1) is inserted into the engine to be oil-sealed, then an external nitrogen source is connected via the air charging joint (27), and finally the external nitrogen source is started, so that the nitrogen in the nitrogen source passes through the air filter device (26), the pressure reducing valve (25), the reversing valve (24) and the one-way valve C (23) in the air injection pipeline in sequence, and finally is injected into the engine via the quick-release joint (1) in the oil injection hose (2), so as to discharge the oil in the engine to be oil-sealed and realize nitrogen charging and oil removal.

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