Device and method for controlling lubricating oil interruption test of aero-engine

Abstract

The invention relates to a device and method for controlling a lubricating oil interruption test of an aero-engine, and the device comprises a valve assembly which is communicated with an oil supply pump of the aero-engine to be tested; and a controller electrically coupled to the valve assembly, the controller for: causing the valve assembly to supply gas to the oil feed pump to initiate a grease interrupt test; when the lubricating oil interruption duration is close to the lubricating oil interruption duration set value, the valve assembly supplies gas to the oil supply pump and compensates the oil supply pump with lubricating oil at the same time; and when the lubricating oil interruption duration reaches the lubricating oil interruption duration set value, the valve assembly supplies the lubricating oil and stops supplying the gas.

Description

Technical Field

[0001] The present invention relates to the field of aero-engine test research, and more particularly to a device and method for controlling a lubricating oil interruption test of an aero-engine. Background Art

[0002] The aero-engine lubrication system mainly undertakes functions such as lubrication, cooling, cleaning, and providing working media for other systems, and is crucial for the normal operation of the aero-engine. During the use of an aero-engine, it may encounter negative acceleration. At this time, the lubricating oil flow rate decreases or even completely interrupts. Components such as bearings and gears are prone to situations such as shaft seizure or jamming when working under the condition of no lubricating oil or residual lubricating oil, resulting in the loss of engine thrust and seriously endangering the safety of the aircraft when the engine catches fire. Lubricating oil interruption is an expected operating environment of the aero-engine. The aero-engine must have a certain working ability under the condition of lubricating oil interruption. Therefore, during the design of the aero-engine, it is necessary to carry out verification of the working ability under lubricating oil interruption. There are requirements for carrying out lubricating oil interruption verification in both military and civil aviation fields. GJB242A-2018 "General Specification for Aero-Turboprop and Turbo-Shaft Engines" stipulates that the engine can operate at intermediate power for 30 s without supplying oil to the inlet of the lubricating oil pump. During the lubricating oil interruption period and within 30 min after the subsequent restoration of normal lubrication, the engine should be able to operate normally without damage. The civil aviation airworthiness regulation CCAR33.71(a) requires that each lubrication system must be able to operate normally under the flight attitudes and atmospheric conditions expected for the aircraft, which implicitly requires the ability to operate normally in the event of lubricating oil interruption caused by situations such as negative acceleration. To demonstrate compliance with the lubricating oil interruption requirements, conducting a lubricating oil interruption test is the mainstream compliance method. Therefore, a set of test devices that can meet the requirements of military / civil aviation regulations is needed.

[0003] The existing aero-engine lubricating oil interruption test device conducts lubricating oil interruption by installing a three-way valve, without considering the pressure loss problem caused by installing the three-way valve. If the pressure loss is too large, the lubricating oil cannot smoothly reach the inlet of the oil supply pump at the normal flow rate and pressure, resulting in insufficient oil supply pressure in the lubricating oil system, and cavitation may also occur in the oil supply pump. For the current control of the lubricating oil interruption test, the lubricating oil interruption test is mainly implemented by manually controlling the lubricating oil interruption. The control process is relatively cumbersome and difficult, and the control accuracy is affected by the operator, and it is easy to cause delays in the start and stop of the lubricating oil interruption due to human reasons, resulting in the actual lubricating oil interruption duration exceeding the required duration, ultimately strengthening the assessment of the lubricating oil system, not conforming to the actual working state of the aero-engine, and bringing an additional burden to the enterprise.

[0004] In addition, manual control of lubricating oil interruption is not precise enough for controlling test risks. It requires manual identification of abnormalities in various parameters during the test and taking corresponding measures, which is difficult and risky, not conducive to test risk control, and brings potential hazards to the enterprise. For the existing automatic control methods of the lubricating oil interruption test device for aeroengines, generally, multiple devices (such as adding a host computer and a controller) are added for automatic control, and the process is cumbersome and complex, increasing a certain degree of complexity and cost for the lubricating oil interruption test. In addition, the existing lubricating oil interruption test device for aeroengines does not mention the control method for the oil supply recovery duration, so it often causes an increase in the duration of the lubricating oil interruption test due to a relatively long oil supply recovery duration.

[0005] Therefore, in order to solve the problems of complex control, low precision, and poor risk control ability during the lubricating oil interruption test, while reducing the influence of human errors, as well as reducing the deviation between the test operating conditions and the actual operating conditions caused by pressure loss and the problem of strengthening test assessment caused by a long oil supply recovery time, the present invention proposes a device and method for controlling the lubricating oil interruption test of an aeroengine. By introducing a Programmable Logic Controller (PLC) and combining it with the monitoring parameters of the Engine Electronic Controller (EEC) of the aeroengine, the lubricating oil interruption test is automatically controlled throughout the process, achieving precise control of the lubricating oil interruption time, real-time risk control, and simple operation. At the same time, an S-shaped buffer hose is integrated into the three-way valve to relieve the impact of lubricating oil or gas on the three-way valve, and a lubricating oil compensation channel is introduced to reduce the oil supply recovery time. Moreover, by setting the lubricating oil input end and output end of the three-way valve on a straight line, the pressure loss caused by adding the three-way valve is reduced. Summary of the Invention

[0006] The present invention provides a device and method for controlling the lubricating oil interruption test of an aeroengine, which can precisely control the lubricating oil interruption time, real-time control risks, and have simple operation.

[0007] According to one aspect of the present invention, there is provided a device for controlling the lubricating oil interruption test of an aeroengine, wherein the device includes: a valve assembly communicated with the oil supply pump of the aeroengine to be tested; and a controller electrically coupled to the valve assembly, and the controller is configured to: supply gas to the oil supply pump through the valve assembly to start the lubricating oil interruption test; when the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration, supply lubricating oil to the oil supply pump through the valve assembly while supplying gas; and when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, supply lubricating oil through the valve assembly and stop supplying gas.

[0008] The device as described above, wherein the controller is further configured to: complete a lubricating oil interruption test when the duration of the lubricating oil interruption reaches a set value of the duration of the lubricating oil interruption.

[0009] The device as described in any one of the above, wherein the controller includes: a timer and / or a counter, configured to: detect whether the duration of the lubricating oil interruption is close to the set value of the duration of the lubricating oil interruption; and / or detect whether the duration of the lubricating oil interruption reaches the set value of the duration of the lubricating oil interruption.

[0010] The device as described in any one of the above, wherein the device further includes: a changeover switch, which is electrically connected to the controller and the valve assembly, and the changeover switch is controlled by the controller to control the valve assembly.

[0011] The device as described in any one of the above, wherein the valve assembly includes: a ball valve, and a lubricating oil input channel, an output channel, and a gas input channel that communicate with the ball valve.

[0012] The device as described in any one of the above, wherein the ball valve includes a lubricating oil compensation channel, and the controller is configured to compensate for lubricating oil through the lubricating oil compensation channel.

[0013] The device as described in any one of the above, wherein the controller compensating for lubricating oil through the lubricating oil compensation channel includes: the controller is configured to, when the duration of the lubricating oil interruption is close to the set value of the duration of the lubricating oil interruption, make the ball valve in a state of partially opening the channel.

[0014] The device as described in any one of the above, wherein the output channel and the lubricating oil input channel are on the same straight line.

[0015] The device as described in any one of the above, wherein the valve assembly further includes: a hose, which is arranged in the lubricating oil input channel and the gas input channel.

[0016] The device as described in any one of the above, wherein the controller is a programmable logic controller PLC.

[0017] According to another aspect of the present invention, there is provided a method for controlling a lubricating oil interruption test of an aeroengine, wherein the method includes: making a valve assembly communicating with an oil supply pump of the aeroengine to be tested supply gas to the oil supply pump to start the lubricating oil interruption test; when the duration of the lubricating oil interruption is close to the set value of the duration of the lubricating oil interruption, making the valve assembly supply lubricating oil to the oil supply pump while supplying gas to the oil supply pump; and when the duration of the lubricating oil interruption reaches the set value of the duration of the lubricating oil interruption, making the valve assembly supply lubricating oil and stop supplying gas.

[0018] The method as described above, wherein the method further includes: completing the lubricating oil interruption test when the duration of the lubricating oil interruption reaches the set value of the duration of the lubricating oil interruption.

[0019] The method according to any one of the above, wherein the method further comprises: detecting whether the duration of the lubricating oil interruption is close to a set value of the duration of the lubricating oil interruption; and detecting whether the duration of the lubricating oil interruption reaches the set value of the duration of the lubricating oil interruption.

[0020] The method according to any one of the above, wherein detecting whether the duration of the lubricating oil interruption is close to a set value of the duration of the lubricating oil interruption and detecting whether the duration of the lubricating oil interruption reaches the set value of the duration of the lubricating oil interruption comprises: using a timer and / or a counter.

[0021] The method according to any one of the above, wherein the valve assembly comprises: a ball valve, and a lubricating oil input channel, a lubricating oil output channel, and a gas input channel that communicate with the ball valve.

[0022] The method according to any one of the above, wherein the valve assembly comprises a lubricating oil compensation channel, and compensating the lubricating oil to the oil supply pump while supplying gas to the oil supply pump by the valve assembly comprises: compensating the lubricating oil through the lubricating oil compensation channel.

[0023] The method according to any one of the above, wherein the output channel and the lubricating oil input channel are on the same straight line.

[0024] The method according to any one of the above, wherein causing the valve assembly communicating with the oil supply pump of the aero-engine to be tested to supply gas to the oil supply pump to initiate a lubricating oil interruption test comprises: initiating the lubricating oil interruption test in response to the rotational speed of the aero-engine to be tested reaching the test rotational speed.

[0025] The method according to any one of the above, wherein when the duration of the lubricating oil interruption is close to the set value of the duration of the lubricating oil interruption, compensating the lubricating oil to the oil supply pump while supplying gas to the oil supply pump by the valve assembly comprises: initiating a timer for timing and / or initiating a counter for counting in response to the lubricating oil supply pressure dropping to a specified minimum lubricating oil pressure limit value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, wherein:

[0027] Figure 1 is a schematic diagram showing an apparatus for controlling a lubricating oil interruption test of an aero-engine connected to the aero-engine according to an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram showing further details of an apparatus for controlling a lubricating oil interruption test of an aero-engine connected to the aero-engine according to an embodiment of the present invention;

[0029] Figure 3is a perspective view of a three-way valve according to an embodiment of the present invention and a schematic diagram of three working states of the three-way valve;

[0030] Figure 4 is a schematic diagram of a changeover switch according to an embodiment of the present invention;

[0031] Figure 5 is a flowchart of a method for controlling a lubricating oil interruption test of an aeroengine according to an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the logic for controlling a lubricating oil interruption test of an aeroengine according to an embodiment of the present invention. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is clearly capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0034] In the following description, it should be understood that the terms "upper", "lower", "left", "middle", "right", "clockwise", etc. used in the present disclosure indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention. In addition, the drawings are only examples and are not drawn under the condition of equal scale, and should not be used to limit the actual protection scope required by the present invention.

[0035] Figure 1 is a schematic diagram of a device 1000 for controlling a lubricating oil interruption test of an aeroengine connected to an aeroengine 1100 according to an embodiment of the present invention.

[0036] As Figure 1 shown, the device 1000 for controlling a lubricating oil interruption test of an aeroengine may include: a controller 1001 and a valve assembly 1003. The valve assembly 1003 is communicated with an oil supply pump (not shown) of the aeroengine 1100 to be tested. In some embodiments, the device 1000 may further include a changeover switch.

[0037] As Figure 1As shown, the controller 1001 can be electrically coupled to the valve assembly 1003, and the controller 1001 and the valve assembly 1003 can also be electrically coupled to the aeroengine 1100. The controller 1001 can be used to: supply gas to the oil supply pump by the valve assembly 1003 to initiate a lubricating oil interruption test; when the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration (for example, 4 seconds, 5 seconds, 6 seconds, etc. before the set value of the lubricating oil interruption duration), make the valve assembly 1003 compensate the lubricating oil to the oil supply pump while supplying gas to the oil supply pump; and when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, make the valve assembly 1003 supply lubricating oil and stop supplying gas.

[0038] In some embodiments, the controller 1001 can be further used to: complete the lubricating oil interruption test when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration. In some embodiments, the controller 1001 can be further used to: detect whether the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration; and / or detect whether the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration.

[0039] In some embodiments, the controller 1001 can be electrically coupled to the switching switch 1002, and the switching switch 1002 can then be electrically coupled to the valve assembly 1003. That is to say, the switching switch 1002 can be electrically connected to the controller 1001 and the valve assembly 1003, and the switching switch 1002 can be controlled by the controller 1001 for controlling the valve assembly 1003.

[0040] In some embodiments, the valve assembly 1003 can include a ball valve and a lubricating oil input channel, an output channel, and a gas input channel that communicate with the ball valve. The ball valve includes a lubricating oil compensation channel, and the controller 1001 is used to compensate the lubricating oil through the lubricating oil compensation channel. In some embodiments, the controller 1001 is used to compensate the lubricating oil through the lubricating oil compensation channel includes: the controller 1001 is used to make the ball valve partially open the channel in response to the lubricating oil interruption duration being close to the set value of the lubricating oil interruption duration. In some embodiments, the output channel and the lubricating oil input channel are on the same straight line to reduce the pressure loss of the lubricating oil caused by the change in flow direction. In some embodiments, the controller 1001 can be a programmable logic controller (PLC).

[0041] In some embodiments, the valve assembly 1003 can include a hose, and the hose is arranged in the lubricating oil input channel and the gas input channel. This reduces the impact force generated by the switching between the lubricating oil and the gas, thereby protecting the structural safety of the three-way valve and reducing the impact of the switching-generated impact phenomenon on the lubricating oil interruption test. In some embodiments, the hose can be an S-shaped hose.

[0042] Figure 2It is a schematic diagram showing further details of a device for controlling a lubricating oil interruption test connected to an aeroengine 1 according to an embodiment of the present invention.

[0043] As Figure 2 shown, the components of the aeroengine 1 related to the lubricating oil system mainly may include: an electronic engine controller (EEC) 101, a front bearing chamber 102, a middle bearing chamber 103, a rear bearing chamber 104, a lubricating oil radiator 105, a scavenge pump 106, a pressure pump 107, a gearbox 108, and a lubricating oil tank 109.

[0044] The flow paths of the lubricating oil and gas during the lubricating oil interruption test are as follows:

[0045] Before the lubricating oil interruption test, the lubricating oil flow path is from the lubricating oil tank 109 - three-way valve 2 - pressure pump 107 - lubricating oil radiator 105 - front bearing chamber 102 / middle bearing chamber 103 / rear bearing chamber 104 / gearbox 108 - scavenge pump 106 - lubricating oil tank 109.

[0046] During the lubricating oil interruption test, the lubricating oil flow path is that the lubricating oil input port 203 of the three-way valve 2 from the lubricating oil tank 109 is blocked and no longer flows; the gas flow path is from the three-way valve 2 - pressure pump 107 - lubricating oil radiator 105 - front bearing chamber 102 / middle bearing chamber 103 / rear bearing chamber 104 / gearbox 108 - scavenge pump 106 - lubricating oil tank 109.

[0047] Continuing to refer to Figure 2 , Figure 2 the programmable logic controller PLC 4 in Figure 1 may be the controller 1001 described above in connection with Figure 2 the change-over switch 3 in Figure 1 may be the change-over switch 1002 described above in connection with Figure 2 the three-way valve 2 in Figure 1 may be the valve assembly 1003 described above in connection with

[0048] As Figure 2 shown, the programmable logic controller PLC 4 may be electrically coupled to the three-way valve 2, and the programmable logic controller PLC 4 and the three-way valve 2 may also be electrically coupled to the aeroengine 1. The programmable logic controller PLC 4 may be used to: cause the three-way valve 2 to supply gas to the pressure pump to start the lubricating oil interruption test; when the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration (for example, 4 seconds, 5 seconds, 6 seconds, etc. before the set value of the lubricating oil interruption duration), cause the three-way valve 2 to supply lubricating oil to the pressure pump while supplying gas; and when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, cause the three-way valve 2 to supply lubricating oil and stop supplying gas.

[0049] In some embodiments, the programmable logic controller 4 can further be configured to: complete a lubricating oil interruption test when the duration of the lubricating oil interruption reaches a set value of the lubricating oil interruption duration.

[0050] In some embodiments, the programmable logic controller 4 can further include: a timer and / or a counter (not shown), which is used to detect whether the duration of the lubricating oil interruption is close to the set value of the lubricating oil interruption duration and / or detect whether the duration of the lubricating oil interruption reaches the set value of the lubricating oil interruption duration.

[0051] In some embodiments, the programmable logic controller PLC 4 can be electrically coupled to a switching switch 3, and the switching switch 3 can in turn be electrically coupled to a three-way valve 2. That is to say, the switching switch 3 can be electrically connected to the programmable logic controller PLC 4 and the three-way valve 2, and the switching switch 3 can be controlled by the programmable logic controller PLC 4 to control the three-way valve 2.

[0052] Specifically, the three-way valve 2 can be located between the outlet of the lubricating oil tank 109 and the inlet of the oil supply pump 107, and is used to switch the supply of lubricating oil or gas, and its fail-safe position is the fully closed position (that is, only lubricating oil is supplied and no gas is supplied). The upper end of the switching switch 3 can be connected to the three-way valve 2 to control the switching of the lubricating oil and gas inputs of the three-way valve, and the lower end can be connected to the programmable logic controller 4 and thus be controlled by the controller. One end of the programmable logic controller 4 can be connected to the aero-engine electronic controller EEC 101 to read parameters such as lubricating oil pressure, temperature, and vibration in the electronic controller 101; the other end can be connected to the switching switch 3 to control the switching switch channel.

[0053] In some embodiments, the three-way valve 2 can include a ball valve and a lubricating oil input channel, an output channel, and a gas input channel that communicate with the ball valve. The ball valve includes a lubricating oil compensation channel, and the PLC 4 is used to compensate the lubricating oil through the lubricating oil compensation channel. In some embodiments, the PLC 4 is used to compensate the lubricating oil through the lubricating oil compensation channel includes: the PLC 4 is used to make the ball valve in a partially open channel in response to the duration of the lubricating oil interruption approaching the set value of the lubricating oil interruption duration. In some embodiments, the output channel and the lubricating oil input channel are on the same straight line to reduce the pressure loss of the lubricating oil caused by the change in flow direction.

[0054] In some embodiments, the three-way valve 2 can include a hose, and the hose is arranged in the lubricating oil input channel and the gas input channel. This reduces the impact force generated by the switching between the lubricating oil and the gas, thereby protecting the structural safety of the three-way valve, and at the same time reducing the impact of the switching-generated impact phenomenon on the lubricating oil interruption test. In some embodiments, the hose can be an S-shaped hose.

[0055] In some embodiments, the controller (such as Figure 1The controller 1001 shown and as Figure 2 shown, the PLC 4) is built - in with a manual start / stop lubricating oil interruption test button to control the lubricating oil interruption, and is built - in with a timer and a counter to record parameters such as the duration of a single lubricating oil interruption, the number of times, and the running duration after a single oil supply recovery. The controller can set parameters such as the duration of a single lubricating oil interruption, the number of times, and the running duration after a single oil supply recovery, automatically calculate parameters such as the total cumulative duration of lubricating oil interruption and the total cumulative running duration after oil supply recovery, and has a data storage function to save the above - mentioned data.

[0056] Figure 3 FIG. 6 is a perspective view of a three - way valve 300 according to an embodiment of the present invention and schematic diagrams of three working states of the three - way valve 300.

[0057] Figure 3 The three - way valve 300 in [reference] can be the valve assembly 1003 described above in connection with Figure 1 or can be the three - way valve 2 described above in connection with Figure 2 .

[0058] Figure 3 Part (a) of [reference] shows a perspective view of the three - way valve 300, Figure 3 Part (b) of [reference] shows the state of the three - way valve 300 in the fully - closed position before the lubricating oil interruption, Figure 3 Part (c) of [reference] shows the state of the three - way valve 300 in the fully - open position during the lubricating oil interruption, Figure 3 Part (d) of [reference] shows the state of the three - way valve 300 in a partially - open channel when the lubricating oil interruption time is about to reach the requirement.

[0059] As Figure 3 shown in parts (b) to (d) of [reference], the three - way valve 300 may include a ball valve 305, a lubricating oil input channel 301 communicating with the ball valve 305, an output channel 306, and a gas input channel 303. The lubricating oil input channel 301 can be connected to the outlet pipeline of a lubricating oil tank (such as the lubricating oil tank 109 shown in Figure 2 ) to introduce lubricating oil into the three - way valve 300. The output channel 306 can be connected to the inlet pipeline of an oil supply pump (such as the oil supply pump 107 shown in Figure 2 ) to transfer the lubricating oil to the inlet of the oil supply pump 107.

[0060] In some embodiments, the output channel 306 can be on the same straight line as the lubricating oil input channel 301 to reduce the pressure loss of the lubricating oil caused by the change in flow direction.

[0061] In some embodiments, the ball valve 305 may include a lubricating oil compensation channel 302, and the controller is configured to compensate for the lubricating oil through the lubricating oil compensation channel 302. In some embodiments, the controller's compensating for the lubricating oil through the lubricating oil compensation channel 302 includes: the controller is configured to cause the ball valve to be in a partially open state in response to the lubricating oil interruption duration approaching a set value of the lubricating oil interruption duration (e.g., 4 seconds, 5 seconds, 6 seconds, etc. before the set value of the lubricating oil interruption duration). Since the lubricating oil compensation channel 302 is provided in the ball valve 305 of the three-way valve 300, part of the lubricating oil can enter the oil supply pump under specific conditions to increase the oil supply pressure, thereby reducing the oil supply pressure recovery time.

[0062] In some embodiments, the three-way valve 300 may further include hoses 304 and 307. The hose 307 may be disposed in the lubricating oil input channel 301 and the hose 304 may be disposed in the gas input channel 303 to reduce the impact on the three-way valve 300 caused by the switching between the lubricating oil and the gas. In some embodiments, the hoses 304 and 307 may be S-shaped hoses. In some embodiments, the three-way valve 300 may further include a housing 308.

[0063] As Figure 3 shown in part (b) of

[0064] As Figure 3 shown in part (c) of

[0065] As Figure 3As shown in part (d), when the lubricating oil interruption time is about to meet the requirement (i.e., reach the set value of the lubricating oil duration), the ball valve 305 is in the partially open channel, that is, the ball valve 305 rotates a specific angle clockwise based on the fully open position, so that the lubricating oil compensation channel 302 is connected to the lubricating oil input channel 301, ensuring a certain lubricating oil flow rate to increase the oil supply pressure. The remaining channels of the ball valve 305 are respectively connected to the gas input channel 303 and the output channel 306. At this time, there is a situation where both lubricating oil and air exist in the output channel 306. By setting up the lubricating oil compensation channel 302 in the ball valve 305, part of the lubricating oil can enter the oil supply pump under specific conditions (such as Figure 2 the oil supply pump 107 shown) to increase the oil supply pressure and thus reduce the oil supply pressure recovery time.

[0066] Figure 4 FIG. is a schematic diagram showing a change-over switch 400 according to an embodiment of the present invention.

[0067] As Figure 4 shown, the change-over switch 400 may include three channels, namely a fully closed channel 401 (i.e., only lubricating oil is supplied), a partially open channel 402 (i.e., both lubricating oil and gas are supplied), and a fully open channel 403 (i.e., only gas is supplied).

[0068] In some embodiments, a controller (such as Figure 1 the controller 1001 shown and such as Figure 2 the PLC 4 shown) controls the change-over switch 400 to switch to the fully closed channel 401. The change-over switch 400 then positions the ball valve 305 in the fully open position. At this time, only the lubricating oil input channel 301 is in communication with the output channel 306 (i.e., only lubricating oil is supplied).

[0069] In some embodiments, a controller (such as Figure 1 the controller 1001 shown and such as Figure 2 the PLC 4 shown) controls the change-over switch 400 to switch to the partially open channel 402. The change-over switch 400 then positions the ball valve 305 in the partially open channel. At this time, only the lubricating oil compensation channel 302 and the gas input channel 303 are in communication with the output channel 306 (i.e., both lubricating oil and gas are supplied).

[0070] In some embodiments, a controller (such as Figure 1 the controller 1001 shown and such as Figure 2 the PLC 4 shown) controls the change-over switch 400 to switch to the fully open channel 403. The change-over switch 400 then positions the ball valve 305 in the fully open position. At this time, only the gas input channel 303 is in communication with the output channel 306 (i.e., only gas is supplied).

[0071] Figure 5It is a flowchart showing a method 500 for controlling a lubricating oil interruption test of an aeroengine according to an embodiment of the present invention.

[0072] As Figure 5 shown, the method 500 may include: step S0, where step S0 is: causing a valve assembly connected to the oil supply pump of the aeroengine to be tested to supply gas to the oil supply pump to start the lubricating oil interruption test. Optionally, the method 500 may further include step S1, where step S1 is: detecting whether the lubricating oil interruption duration is close to a set value t1 of the lubricating oil interruption duration. The method 500 may further include step S2, where step S2 is: when the lubricating oil interruption duration is close to the set value t1 of the lubricating oil interruption duration (for example, 4 seconds, 5 seconds, 6 seconds, etc. before the set value of the lubricating oil interruption duration), causing the valve assembly to compensate the lubricating oil to the oil supply pump while supplying gas to the oil supply pump. Optionally, the method 500 may further include step S3, where step S3 is: detecting whether the lubricating oil interruption duration reaches the set value t1 of the lubricating oil interruption duration. The method 500 may further include step S4, where step S4 is: when the lubricating oil interruption duration reaches the set value t1 of the lubricating oil interruption duration, causing the valve assembly to supply lubricating oil and stop supplying gas. Optionally, the method 500 may further include step S5, where step S5 is: when the lubricating oil interruption duration reaches the set value t1 of the lubricating oil interruption duration, completing the lubricating oil interruption test.

[0073] In some embodiments, detecting whether the lubricating oil interruption duration is close to the set value t1 of the lubricating oil interruption duration and detecting whether the lubricating oil interruption duration reaches the set value t1 of the lubricating oil interruption duration include: using a timer and / or a counter.

[0074] In some embodiments, the valve assembly includes: a ball valve and a lubricating oil input channel, a lubricating oil output channel, and a gas input channel connected to the ball valve. The valve assembly includes a lubricating oil compensation channel, and causing the valve assembly to compensate the lubricating oil to the oil supply pump while supplying gas to the oil supply pump includes: compensating the lubricating oil through the lubricating oil compensation channel. In some embodiments, the output channel and the lubricating oil input channel are on the same straight line to reduce the pressure loss of the lubricating oil caused by the change in flow direction.

[0075] In some embodiments, causing a valve assembly connected to the oil supply pump of the aeroengine to be tested to supply gas to the oil supply pump to start the lubricating oil interruption test includes: starting the lubricating oil interruption test in response to the speed of the aeroengine to be tested reaching the test speed.

[0076] Figure 6 It is a schematic diagram showing a logic 600 for controlling a lubricating oil interruption test of an aeroengine according to an embodiment of the present invention.

[0077] As Figure 6 shown, the automatic control logic 600 of the lubricating oil interruption test is as follows:

[0078] Before starting the lubricating oil interruption test, the controller (such as the controller 1001 shown in Figure 1 and the PLC 4 shown in Figure 2 ) sets the single lubricating oil interruption duration (t1), the number of interruptions, and the single oil supply recovery operation duration (t2). Manually press the start lubricating oil interruption test button. In response to the engine speed reaching the test speed (such as the speed corresponding to the maximum continuous thrust), by controlling the switching switch (such as the switching switch 1002 shown in Figure 1 or the switching switch 3 shown in Figure 2 ), the control valve assembly (such as the valve assembly 1003 shown in Figure 1 or the three-way valve 2 shown in Figure 2 ) is brought to the fully open position, so that the valve assembly changes from lubricating oil inflow to gas inflow. Otherwise, the start lubricating oil interruption test signal is invalid, and continue to wait for the engine speed to meet the requirements, and give relevant signal information for waiting for the speed to reach the test speed.

[0079] After a period of time (such as 2 seconds - 30 seconds) when the valve assembly changes from lubricating oil inflow to gas inflow, judge whether the lubricating oil supply pressure drops to the specified minimum lubricating oil pressure limit value. If the required lubricating oil pressure has been reached, give a prompt sound, and at the same time, the built-in timer of the PLC starts timing and the counter starts counting. If the required lubricating oil pressure has not been reached yet, control the three-way valve to reach the fully closed position, so that the three-way valve changes from gas input to lubricating oil input, and the test terminates.

[0080] When the lubricating oil interruption duration is close to the single lubricating oil interruption duration setting value (t1) (for example, 4 seconds before t1, 5 seconds before t1, 6 seconds before t1, etc.), control the switching switch to reach the partially open position, so that part of the lubricating oil enters the ball valve through the lubricating oil compensation channel and then flows into the oil supply pump, making the lubricating oil supply pressure close to the minimum lubricating oil pressure limit value.

[0081] When the lubricating oil interruption duration reaches t1 (if multiple interruptions need to be carried out and the single interruption duration and the operation duration after lubricating oil recovery are inconsistent, the duration can be dynamically adjusted), give a prompt sound, and control the switching switch to reach the fully closed position, so that the valve assembly changes from gas inflow to lubricating oil inflow, and at the same time, the built-in memory of the PLC records t1.

[0082] When the duration of the lubricating oil interruption reaches the single fuel supply restoration operation duration (t2), the built-in counter of the PLC increments by 1. At the same time, the built-in memory of the PLC records t2 and the value of the counter, and the timer and counter are turned off. Determine whether it is necessary to conduct the interruption test again. If so, return to the step of judging whether the engine speed has reached the test speed (such as the speed corresponding to the maximum continuous thrust). If not, receive the signal to turn off the manual start of the lubricating oil interruption test. At the same time, the PLC gives the single lubricating oil interruption duration, the number of interruptions, the operation duration after single fuel supply restoration, the cumulative lubricating oil interruption duration, and the cumulative operation duration after fuel supply restoration, and the test ends.

[0083] It should be noted that during the entire lubricating oil test process, the controller monitors in real time online whether the lubricating oil temperature, vibration, magnetic plug, speed, etc. are abnormal. If any abnormality occurs, the control switch is switched to the fully closed position, causing the three-way valve to change from gas inflow to lubricating oil inflow, and the test terminates.

[0084] The embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that the description in the specification is illustrative rather than restrictive, and the scope of the present invention is defined by the appended claims.

Claims

1. A device for controlling a lubricating oil interruption test of an aeroengine, characterized in that, the device comprises: a valve assembly communicated with an oil supply pump of the aeroengine to be tested; and a controller, the controller being electrically coupled with the valve assembly, and the controller being configured to: cause the valve assembly to supply gas to the oil supply pump to initiate the lubricating oil interruption test; when the lubricating oil interruption duration is close to a set value of the lubricating oil interruption duration, cause the valve assembly to supply lubricating oil to the oil supply pump while supplying gas to the oil supply pump; and when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, cause the valve assembly to supply lubricating oil and stop supplying gas.

2. The device according to claim 1, characterized in that, the controller is further configured to: complete the lubricating oil interruption test when the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration.

3. The device according to claim 1, characterized in that, the controller comprises: a timer and / or a counter, configured to: detect whether the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration; and / or detect whether the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration.

4. The device according to claim 1, characterized in that, the device further comprises: a changeover switch, the changeover switch being electrically connected with the controller and the valve assembly, and the changeover switch being controlled by the controller to control the valve assembly.

5. The device according to claim 1, characterized in that, the valve assembly comprises: a ball valve and a lubricating oil input channel, an output channel and a gas input channel communicated with the ball valve.

6. The device according to claim 5, characterized in that, the ball valve comprises a lubricating oil compensation channel, and the controller is configured to compensate the lubricating oil through the lubricating oil compensation channel.

7. The device according to claim 6, characterized in that, the controller compensating the lubricating oil through the lubricating oil compensation channel comprises: the controller is configured to cause the ball valve to be in a state of partially opening the channel in response to the lubricating oil interruption duration being close to the set value of the lubricating oil interruption duration.

8. The device according to claim 5, characterized in that, the output channel and the lubricating oil input channel are on the same straight line.

9. The device according to claim 5, characterized in that, the valve assembly further comprises: a hose, the hose being arranged in the lubricating oil input channel and the gas input channel.

10. The device according to claim 1, characterized in that, the controller is a programmable logic controller PLC.

11. A method for controlling a lubricating oil interruption test of an aeroengine, characterized in that, the method comprises: causing a valve assembly communicated with an oil supply pump of the aeroengine to be tested to supply gas to the oil supply pump to initiate the lubricating oil interruption test; when the lubricating oil interruption duration is close to a set value of the lubricating oil interruption duration, causing the valve assembly to supply lubricating oil to the oil supply pump while supplying gas to the oil supply pump; and When the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, make the valve assembly supply lubricating oil and stop supplying gas.

12. The method according to claim 11, wherein, the method further comprises: When the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration, complete the lubricating oil interruption test.

13. The method according to claim 11, wherein, the method further comprises: detecting whether the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration; and detecting whether the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration.

14. The method according to claim 13, wherein, detecting whether the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration and detecting whether the lubricating oil interruption duration reaches the set value of the lubricating oil interruption duration include: using a timer and / or a counter.

15. The method according to claim 11, wherein, the valve assembly includes: a ball valve and a lubricating oil input channel, a lubricating oil output channel, and a gas input channel that communicate with the ball valve.

16. The method according to claim 15, wherein, the valve assembly includes a lubricating oil compensation channel, and making the valve assembly compensate the lubricating oil to the fuel supply pump while supplying gas to the fuel supply pump includes: compensating the lubricating oil through the lubricating oil compensation channel.

17. The method according to claim 16, wherein, the output channel and the lubricating oil input channel are on the same straight line.

18. The method according to claim 11, wherein, making the valve assembly that communicates with the fuel supply pump of the aircraft engine to be tested supply gas to the fuel supply pump to start the lubricating oil interruption test includes: starting the lubricating oil interruption test in response to the speed of the aircraft engine to be tested reaching the test speed.

19. The method according to claim 11, wherein, when the lubricating oil interruption duration is close to the set value of the lubricating oil interruption duration, making the valve assembly compensate the lubricating oil to the fuel supply pump while supplying gas to the fuel supply pump includes: starting a timer for timing and / or starting a counter for counting in response to the lubricating oil supply pressure dropping to the specified minimum lubricating oil pressure limit value.

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