Rain supply regulating device for aero turboshaft engine and control method thereof

Abstract

The application provides a rainwater supply adjusting device suitable for an aviation turboshaft engine and a control method thereof. The device comprises a test bench electrical control system, a control system, a first water tank and a second water tank. The bottoms of the first water tank and the second water tank are respectively connected with an input end of a filter through a first adjusting valve and a second adjusting valve. An output end of the filter is sequentially connected with an adjusting device, a pressure gauge, a pressure sensor, a flowmeter, a connecting pipeline, a quick connector, a connecting hose and an on-off valve through a connecting pipeline. The test bench electrical control system is signal connected with the on-off valve, and is used for controlling the on-off valve to realize quick on-off of rainwater supply. The control system is signal connected with the adjusting device, the pressure sensor, the flowmeter and the test bench electrical control system, and is used for realizing accurate control of steady-state supply of rainwater and dynamic real-time adjustment of rainwater supply. The application has the functions of simple operation, accurate control, strong applicability, accurate control of steady-state supply of rainwater and dynamic real-time adjustment of supply.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aero-engine testing, in particular, to a rainwater supply adjusting device suitable for aero-turboshaft engines and a control method thereof. BACKGROUND

[0002] In order to ensure that the engine can reliably operate in rainy days and will not adversely affect the operation of the engine, the Civil Aviation Administration of China Airworthiness Regulation "Aero-engine Airworthiness Regulation" (CCAR-33-R2) clearly stipulates the airworthiness requirements for aero-engine rainwater absorption. The 33.78(b) of the regulation makes detailed provisions for the verification requirements of the engine rainwater absorption of the rotorcraft:

[0003] (1) Under the condition of no rainwater absorption, the engine is operated at take-off power for a normal period of time, and then immediately starts to absorb rainwater for 3 minutes at take-off power;

[0004] (2) Continuously absorb rainwater during rapid deceleration to minimum idle speed;

[0005] (3) Continuously absorb rainwater during the operation of the engine at the minimum idle power state for 3 minutes;

[0006] (4) Continuously absorb rainwater during rapid acceleration to take-off power.

[0007] At present, there is no self-innovated civil aviation engine in China that has obtained an airworthiness certificate, and there is little public information about the rainwater absorption airworthiness compliance verification technology. How to supply the engine with rainwater that meets the requirements during the engine take-off power state, minimum idle state, and rapid deceleration and rapid acceleration dynamic process according to the airworthiness clauses is an important condition for the civil aviation turboshaft engine airworthiness rainwater absorption compliance verification work. SUMMARY

[0008] To solve the above technical problems, the present application provides a rainwater supply adjusting device suitable for aero-turboshaft engines.

[0009] The technical scheme adopted by the present application is as follows:

[0010] The rainwater supply adjusting device suitable for aviation turboshaft engine comprises a test bench electrical control system, a control system, a first water tank and a second water tank, the bottoms of the first water tank and the second water tank are connected with the input end of a filter through a first adjusting valve and a second adjusting valve respectively, the output end of the filter is connected with an adjusting device, a pressure gauge, a pressure sensor, a flow meter, a connecting pipeline, a quick connector, a connecting hose and an on-off valve in sequence through the connecting pipeline, the on-off valve is connected with a rainwater spraying device close to the engine inlet, the test bench electrical control system is signal connected with the on-off valve, and the on-off valve is used for realizing the quick on-off of the rainwater supply; the control system is signal connected with the adjusting device, the pressure sensor, the flow meter and the test bench electrical control system respectively, and is used for realizing the remote feedback control operation of the adjusting device according to the engine control lever control signal sent by the test bench electrical control system, so that the rainwater supply changes synchronously with the state of the engine, and the accurate control of the rainwater steady-state supply and the dynamic real-time adjustment of the rainwater supply are realized.

[0011] Further, first air filters and second air filters are further arranged on the first water tank and the second water tank respectively.

[0012] Further, water supplement devices are further arranged on the first water tank and the second water tank respectively, the water supplement devices are connected with the control system circuit respectively, and the control system controls the water supplement devices to supplement the first water tank and the second water tank in real time according to the current liquid levels of the first water tank and the second water tank.

[0013] Further, first discharge valves and second discharge valves are arranged on the bottoms of the first water tank and the second water tank respectively.

[0014] Further, the adjusting device adopts an adjusting pump, an adjusting valve or a combination of the two.

[0015] Another aspect of the present application further provides a control method of the rainwater supply adjusting device suitable for aviation turboshaft engine, comprising the following steps:

[0016] adjusting a control lever for controlling the state of the engine through the test bench electrical control system, obtaining the control lever signal including the operation angle and the operation speed and the engine state response characteristic;

[0017] driving the rainwater supply adjusting device to adjust the rainfall based on the control lever signal through the control system, obtaining the rainwater response characteristic;

[0018] comparing the rainwater response characteristic with the engine state response characteristic, calculating the advance or lag of the rainfall adjustment and the rainwater adjustment factor, so that the rainfall in the dynamic process automatically matches the state change of the engine.

[0019] Further, the engine state response characteristic comprises a detected engine intake flow rate change time T2 and an engine intake flow rate change slope after outputting the joystick signal.

[0020] Further, the rainwater response characteristic comprises a detected rainwater flow rate change time T1 and a rainwater flow rate change slope after outputting the joystick signal.

[0021] Further, the comparison of the rainwater response characteristic and the engine state response characteristic is used to calculate an advance or lag of rainwater adjustment and a rainwater adjustment factor, so that the rainwater in a dynamic process is automatically matched with the state change of the engine, and the specific steps comprise:

[0022] If T1>T2, the joystick signal is sent to the engine with a lag of |T1-T2| time, so that the rainwater flow rate change time T1 is consistent with the engine intake flow rate change time T2.

[0023] If T1<T2, the joystick signal is sent to the rainwater supply adjustment device with a lag of |T1-T2| time, so that the rainwater flow rate change time T1 is consistent with the engine intake flow rate change time T2.

[0024] Further, the comparison of the rainwater response characteristic and the engine state response characteristic is used to calculate an advance or lag of rainwater adjustment and a rainwater adjustment factor, so that the rainwater in a dynamic process is automatically matched with the state change of the engine, and the specific steps further comprise:

[0025] According to the engine intake flow rate change slope, the rainwater adjustment factor is set, the joystick signal sent to the rainwater supply adjustment device is separately preprocessed in segments, the change slope of the joystick signal sent to the rainwater supply adjustment device is changed in segments, and the rainwater flow rate change slope is fitted to the intake flow rate slope of the engine.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] 1) The application can realize the functions of real-time adjustment and supply of maximum state and large flow rate, minimum state and small flow rate, and dynamic change flow rate in the process of rapid deceleration and rapid acceleration between the two states.

[0028] 2) The application uses the method of remote driving the flow regulation of the rainwater supply regulating device by the joystick associated with the joystick controlling the engine state, and the joystick signal is collected and calculated by the rainwater supply regulating device control system, and the output rainwater flow demand target is controlled, so that the rainwater regulation follows the state change of the engine. At the same time, the dynamic process calculation sets a pretreatment, calculates the advance or lag of the rainwater regulation and the rainwater regulation factor according to the characteristics of the rainwater response, and adjusts and intervenes the rainwater spray regulation in advance or lag, so that the rainwater regulation matches the state change of the engine, and the pressure feedback signal is analyzed and compensated, so that the control is accurate, the regulation range is large, the operation is simple, and the applicability is strong;

[0029] 3) The application adopts a double-tank structure, has a large storage capacity, and has a liquid level control function, can connect a water replenishing device in real time according to the type demand, and has strong applicability;

[0030] 4) The application adopts a quick connector to realize quick connection and disassembly, facilitates replacement of subsequent connecting pipelines or equipment according to the type demand, and has strong applicability;

[0031] 5) The application sets the on-off valve near the inlet of the engine flow channel, and directly remotely controls the on-off of the on-off valve by the test bench electrical control system, realizes rapid supply and cut-off of the test rainwater, makes the test examination more strict, and improves the test safety.

[0032] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein for purposes of explanation and not of limitation. In the drawings:

[0034] Figure 1 The rainwater supply regulating device suitable for an aviation turboshaft engine of the preferred embodiment of the application is shown in the schematic diagram.

[0035] Figure 2 The control method flowchart of the rainwater supply regulating device suitable for an aviation turboshaft engine of the preferred embodiment of the application is shown in the schematic diagram.

[0036] As shown in the figure: 1, the first air filter; 2, the second air filter; 3, the first water tank; 4, the second water tank; 5, the first discharge valve; 6, the first regulating valve; 7, the control system; 8, the second regulating valve; 9, the second discharge valve; 10, the filter; 11, the regulating device; 12, the pressure gauge; 13, the pressure sensor; 14, the flow meter; 15, the connecting pipeline; 16, the quick connector; 17, the connecting hose; 18, the on-off valve; 19, the test bench electrical control system. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Reference Figure 1 The preferred embodiment of the present application provides a rainwater supply regulating device suitable for aviation turboshaft engines, comprising a test bench electrical control system 19, a control system 7, a first water tank 3, and a second water tank 4. The bottoms of the first water tank 3 and the second water tank 4 are respectively connected with the input end of a filter 10 through a first regulating valve 6 and a second regulating valve 8. The output end of the filter 10 is connected with a regulating device 11, a pressure gauge 12, a pressure sensor 13, a flow meter 14, a connecting pipeline 15, a quick connector 16, a connecting hose 17, and an on-off valve 18 in sequence through the connecting pipeline 15. The on-off valve 18 is connected with a rainwater injection device close to the engine inlet. The test bench electrical control system 19 is signal connected with the on-off valve 18 for controlling the on-off valve 18 to realize the rapid on-off of rainwater supply. The control system 7 is signal connected with the regulating device 11, the pressure sensor 13, the flow meter 14, and the test bench electrical control system 19 respectively for performing remote feedback control operation on the regulating device 11 according to the engine control lever control signal sent by the test bench electrical control system 19, so that the rainwater supply changes synchronously with the state of the engine, and the precise control of rainwater steady-state supply and the dynamic real-time adjustment of rainwater supply are realized.

[0039] Compared with the prior art, the present embodiment has the following beneficial effects:

[0040] 1) The present embodiment can realize the functions of maximum state large flow, minimum state small flow, and dynamic change flow real-time adjustment supply in the process of rapid deceleration and rapid acceleration between the two states;

[0041] 2) This embodiment uses a joystick that controls the engine status to remotely drive the flow regulation of the rainwater supply regulating device. The rainwater supply regulating device control system collects and processes the joystick signals, then outputs the rainwater flow demand target, so that the rainwater regulation follows the engine status changes. Simultaneously, the dynamic process calculation includes preprocessing. Based on the characteristics of the rainwater response, it calculates the advance or lag amount of rainwater regulation and the rainwater regulation factor, adjusting the rainwater ahead or behind and intervening in the rainwater spray regulation. This ensures that the rainwater regulation matches the engine status changes. Furthermore, it integrates pressure feedback signal analysis and compensation, resulting in precise control, a wide adjustment range, simple operation, and strong applicability.

[0042] 3) This embodiment adopts a dual-tank structure, which has a large storage capacity and a liquid level control function. It can be connected to a water replenishment device to replenish water in real time according to the model requirements, making it highly applicable.

[0043] 4) This embodiment uses quick connectors to achieve quick connection and disassembly, making it convenient to replace subsequent connection pipes or equipment according to model requirements, and has strong applicability;

[0044] 5) In this embodiment, the on / off valve 18 is set near the engine flow channel inlet and is directly and remotely controlled by the test bench electrical control system to realize the rapid supply and cut-off of test rainwater, making the test assessment more rigorous and improving test safety.

[0045] Preferably, the first water tank 3 and the second water tank 4 are also respectively equipped with a first air filter 1 and a second air filter 2 to prevent external impurities from entering the water tank and causing pipe blockage.

[0046] Preferably, the first water tank 3 and the second water tank 4 are also equipped with water replenishment devices, which are respectively connected to the control system 7. The control system 7 controls the water replenishment devices to replenish the first water tank 3 and the second water tank 4 in real time according to the current liquid level of the first water tank 3 and the second water tank 4.

[0047] During operation, the rainwater supply regulation device in this embodiment can connect to a water replenishment device according to the water demand of the model. The control system 7 controls the liquid levels of the first water tank 3 and the second water tank 4 to achieve real-time water replenishment, meet different rainwater demand, and has a wide range of applications.

[0048] Preferably, the bottom of the first water tank 3 and the second water tank 4 are respectively provided with a first discharge valve 5 and a second discharge valve 9 to facilitate the discharge of water from the first water tank 3 and the second water tank 4.

[0049] Preferably, the regulating device 11 is a regulating pump, a regulating valve, or a combination of both.

[0050] The control system 7 realizes rainwater flow closed-loop control with the regulating device 11, the flow meter 14 and the pressure sensor 13. The control system 7 gives rainwater flow demand setting according to the joystick signal, the regulating device 11 executes flow regulation, and the control system 7 gives regulating instructions to the regulating device 11 according to the real-time flow feedback value measured by the flow meter 14 and the pressure feedback value measured by the pressure sensor 13, so as to constantly change the regulating demand until the rainwater demand target is met. The regulating method is applicable to flow demands of different types of engines. Since the regulating capacity of the regulating device 11 changes with the decrease of the storage tank liquid level after the rainwater supply starts, the real-time pressure value measured by the pressure sensor 13 is used as a compensation factor for controlling flow regulation. The on-off valve 18 is arranged near the engine flow passage inlet, and the pipeline can be filled before the test, and the on-off valve 18 is directly and remotely controlled by the test bench electrical control system, so as to realize rapid supply of test rainwater, make the test more rigorous, and quickly cut off to improve test safety.

[0051] As shown in Figure 2 Another preferred embodiment of the present application also provides a control method of the rainwater supply regulating device suitable for aviation turboshaft engines, comprising the steps of:

[0052] S1, adjusting the joystick for controlling the engine state through the test bench electrical control system 19 to obtain the joystick signal including the operation angle and operation speed, and the engine state response characteristic;

[0053] S2, remotely driving the rainwater supply regulating device to adjust the rainfall based on the joystick signal through the control system 7 to obtain the rainwater response characteristic;

[0054] S3, calculating the advance or lag of rainfall adjustment and the rainwater regulating factor by comparing the rainwater response characteristic with the engine state response characteristic, so as to automatically match the rainfall change in the dynamic process with the state change of the engine.

[0055] The lever of the embodiment controls the engine state in the test bench electrical control system 19, which is used to change the engine state. The larger the lever angle, the higher the engine state, and the faster the operation speed, the faster the engine state changes. The lever signal is connected to the control system 7 of the rainwater supply device, and remotely drives the flow adjustment of the rainwater supply adjustment device. After the control system 7 collects and calculates the lever signal, the control output rainwater flow demand target is obtained. The larger the lever angle, the greater the rainwater demand flow, and the faster the operation speed, the faster the rainwater demand flow changes, so as to follow the state change of the engine. In order to make the control more accurate, during the rapid deceleration and rapid acceleration process between the maximum state and the minimum state, the related operation increases the pretreatment setting. According to the comparison between the rainwater response characteristic and the engine state response characteristic, the advance or lag of the rainwater adjustment and the rainwater adjustment factor are calculated, and the rainwater is adjusted in advance or lagged, and the rainwater ejection adjustment is intervened, so as to make the rainfall in the dynamic process match the state change of the engine.

[0056] Preferably, the engine state response characteristic comprises a detected engine intake flow change time T2 and an engine intake flow change slope after outputting the lever signal.

[0057] Preferably, the rainwater response characteristic comprises a detected rainwater flow change time T1 and a rainwater flow change slope after outputting the lever signal.

[0058] Preferably, the comparison between the rainwater response characteristic and the engine state response characteristic is used to calculate the advance or lag of the rainfall adjustment and the rainwater adjustment factor, so as to automatically match the rainfall in the dynamic process with the state change of the engine. Specifically, the steps include:

[0059] S301, if T1>T2, the lever signal is sent to the engine with a lag of ∣T1-T2∣ time, so that the rainwater flow change time T1 is consistent with the engine intake flow change time T2;

[0060] S302, if T1<T2, the lever signal is sent to the rainwater supply adjustment device with a lag of ∣T1-T2∣ time, so that the rainwater flow change time T1 is consistent with the engine intake flow change time T2.

[0061] The embodiment compares the rainwater response characteristic with the engine state response characteristic, finds the difference between the detected rainwater flow change time T1 and the detected engine intake flow change time T2, and adjusts the rainwater flow change time T1 to be consistent with the engine intake flow change time T2 by setting the advance or lag, so as to match the rainfall in the dynamic process with the state change process of the engine, control accurately, applicability strong, operation simple, and can meet the rain absorption verification needs of different types of civil aviation turboshaft engines.

[0062] Preferably, the advance or lag of the rain amount is calculated and the rain amount adjustment factor is calculated by comparing the rainwater response characteristic with the engine state response characteristic, so that the rain amount in the dynamic process is automatically matched with the state change of the engine, and the steps further comprise:

[0063] S311, according to the engine intake flow rate change slope, setting the rainwater adjustment factor, separately segmenting the joystick signal sent to the rainwater supply adjustment device, segmenting the change slope of the joystick signal sent to the rainwater supply adjustment device, so that the rainwater flow rate change slope is fitted to the engine intake flow rate slope.

[0064] In the embodiment, the rainwater flow rate change slope is fitted to the engine intake flow rate slope by segment fitting, so that the rainwater flow rate change slope is consistent with the engine intake flow rate slope, thereby better realizing precise control of the maximum state large flow rate, the minimum state small flow rate, and the dynamic change flow rate in the rapid deceleration and rapid acceleration process between the two states, so that the rain amount is matched with the engine state and automatically controlled following the engine state change.

[0065] In the above embodiment, the control system 7 and the adjustment device 11, the flow meter 14 and the pressure sensor 13 realize rainwater flow closed-loop control, the control system 7 gives the rainwater flow demand given value according to the joystick signal, the adjustment device 11 executes flow adjustment, and the control system 7 gives the adjustment device 11 adjustment instructions according to the real-time flow feedback value measured by the flow meter 14 and the pressure feedback value measured by the pressure sensor 13, so as to constantly change the adjustment demand until the rainwater demand target is met. The adjustment method is applicable to the flow demand of different types of engines. Since the water tank liquid level decreases after the rain starts, the adjustment capacity of the adjustment device 11 changes accordingly, and the real-time pressure value measured by the pressure sensor 13 is used as a compensation factor for controlling flow adjustment. The on-off valve 18 is arranged near the inlet of the engine flow passage, the pipeline can be filled before the test, and the on-off valve can be directly and remotely controlled by the test bench electrical control system, so as to realize rapid supply of test rainwater, make the test more rigorous, and quickly cut off to improve test safety.

[0066] The application has been applied to the whole machine rain absorption airworthiness test of a certain civil aviation turboshaft engine, and the rainwater in the whole rain absorption process (including the take-off state, the minimum idle state, and the rapid acceleration and deceleration dynamic process) meets the test requirements.

[0067] The above only describes the preferred embodiments of the application and is not used to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A control method for a rainwater supply regulating device suitable for an aviation turboshaft engine, the rainwater supply regulating device comprising a test bench electrical control system (19), a control system (7), a first water tank (3), a second water tank (4), the bottom of the first water tank (3) and the second water tank (4) being connected to the input end of a filter (10) through a first regulating valve (6) and a second regulating valve (8) respectively, the output end of the filter (10) being connected to a regulating device (11), a pressure gauge (12), a pressure sensor (13), a flow meter (14), a connecting pipeline (15), a quick connector (16), a connecting hose (17), and an on-off valve (18) in sequence through the connecting pipeline (15), the on-off valve (18) being connected to a rainwater injection device near the engine inlet, the test bench electrical control system (19) being signal connected to the on-off valve (18) for controlling the on-off valve (18) to realize the rapid on-off of the rainwater supply; the control system (7) being signal connected to the regulating device (11), the pressure sensor (13), the flow meter (14), and the test bench electrical control system (19) respectively for remote feedback control operation of the regulating device (11) according to the engine control lever control signal sent by the test bench electrical control system (19) to make the rainwater supply change synchronously with the state of the engine, realize the precise control of the rainwater steady-state supply, and dynamically and real-time regulate the rainwater supply; characterized in that, The method comprises the steps of: adjusting a control lever for controlling engine state through a test bench electrical control system (19), obtaining a control lever signal including operation angle and operation speed, and an engine state response characteristic; driving a rainwater supply adjusting device remotely based on the control lever signal through a control system (7) to adjust rainwater, obtaining a rainwater response characteristic; comparing the rainwater response characteristic with the engine state response characteristic, calculating an advance or lag of rainwater adjustment and a rainwater adjustment factor, so that rainwater in a dynamic process automatically matches the state change of the engine; the engine state response characteristic includes a detected engine intake air flow change time T2 and a detected engine intake air flow change slope after outputting the control lever signal; the rainwater response characteristic includes a detected rainwater flow change time T1 and a detected rainwater flow change slope after outputting the control lever signal; comparing the rainwater response characteristic with the engine state response characteristic, calculating an advance or lag of rainwater adjustment and a rainwater adjustment factor, so that rainwater in a dynamic process automatically matches the state change of the engine, specifically comprising the steps of: if T1>T2, sending the control lever signal to the engine with a lag of |T1-T2| time, so that the rainwater flow change time T1 is consistent with the engine intake air flow change time T2; if T1 2. The control method according to claim 1, characterized by, comparing the rainwater response characteristic with the engine state response characteristic, calculating an advance or lag of rainwater adjustment and a rainwater adjustment factor, so that rainwater in a dynamic process automatically matches the state change of the engine, specifically further comprising the steps of: according to the engine intake air flow change slope, setting a rainwater adjustment factor, separately segmenting and preprocessing the control lever signal sent to the rainwater supply adjusting device, and segmenting and changing the change slope of the control lever signal sent to the rainwater supply adjusting device, so that the rainwater flow change slope fits the intake air flow slope of the engine.

3. The control method according to claim 1, characterized by, The first water tank (3) and the second water tank (4) are respectively provided with first air filters (1) and second air filters (2).

4. The control method according to claim 1, characterized by, The first water tank (3) and the second water tank (4) are respectively provided with water supplementing devices, the water supplementing devices are respectively connected with the control system (7) in an electrical circuit, and the control system (7) controls the water supplementing devices to supplement the first water tank (3) and the second water tank (4) in real time according to the current liquid levels of the first water tank (3) and the second water tank (4).

5. The control method according to claim 4, characterized by The bottoms of the first water tank (3) and the second water tank (4) are respectively provided with first discharge valves (5) and second discharge valves (9).

6. The control method according to claim 4, characterized by The adjusting device (11) is an adjusting pump, an adjusting valve or a combination of the two.

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