Nozzle batch testing device for aircraft auxiliary power unit

Abstract

The application relates to the technical field of aviation devices, and discloses a nozzle batch testing device of an auxiliary power device of an airplane, which comprises an oil supply module, a control module, an isolation bin, a control terminal and a wireless communication module. The oil supply module comprises a first oil supply pipeline, a second oil supply pipeline and a plurality of output ports, any output port is used for connecting a nozzle, the first oil supply pipeline and the second oil supply pipeline are connected with a first oil path and a second oil path through the output ports respectively, the first oil supply pipeline is provided with a first valve, and the second oil supply pipeline is provided with a second valve. The control terminal is located outside the isolation bin, the control module is in communication connection with the output ports, the first valve and the second valve respectively, the control module is controlled by the control terminal to control the on-off of any output port, and the opening degrees of the first valve and the second valve are adjusted to control the flow rates of the first oil supply pipeline and the second oil supply pipeline. Independent testing of the double-oil-path nozzles is realized, and the flexibility and accuracy of the testing are improved.

Description

Technical Field

[0001] This application relates to the field of aviation equipment technology, and in particular to a nozzle batch testing device for an aircraft auxiliary power unit. Background Technology

[0002] The fuel nozzles of an aircraft's auxiliary power unit (APU) are typically designed with a dual fuel line structure. Nozzle testing is a crucial part of APU maintenance, and establishing a more accurate, safe, and efficient nozzle testing platform has become an urgent technical challenge. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] This application proposes a batch testing device for nozzles of an aircraft auxiliary power unit. The nozzle includes a first oil line and a second oil line. The device comprises a fuel supply module, a control module, an isolation chamber, a control terminal, and a wireless communication module. The fuel supply module includes a first fuel supply line, a second fuel supply line, and multiple output ports. Any output port is used to connect to a nozzle. The first and second fuel supply lines are connected to the first and second oil lines respectively through the output ports. The first fuel supply line is equipped with a first valve, and the second fuel supply line is equipped with a second valve. The control terminal is located outside the isolation chamber. The control module is communicatively connected to the output ports, the first valve, and the second valve. The control module is controlled by the control terminal to control the on / off state of any output port and to adjust the opening degree of the first and second valves to control the flow rate of the first and second fuel supply lines. The nozzle is located inside the isolation chamber. The wireless communication module is communicatively connected to both the control module and the control terminal. The wireless communication module is used to establish a wireless data transmission link between the control module and the control terminal.

[0005] In some technical solutions provided in this application, the first valve includes a first servo valve and a first manual valve, the second valve includes a second servo valve and a second manual valve, and the control module includes a servo adjustment unit and a manual adjustment unit. The servo adjustment unit is communicatively connected to both the first servo valve and the second servo valve, and is used to control the opening degree of both valves. The manual adjustment unit is also communicatively connected to both the first manual valve and the second manual valve, and is used to control their opening degrees.

[0006] In some technical solutions provided in this application, the servo adjustment unit includes: a servo driver and a pressure sensor. The servo driver is communicatively connected to the first servo valve and the second servo valve, respectively. The pressure sensor is respectively installed in the first oil supply line and the second oil supply line. The pressure sensor is used to collect the real-time pressure of the first oil supply line and the second oil supply line and feed it back to the servo driver. The servo driver is used to control the opening degree of the first servo valve and the second servo valve according to the real-time pressure and the preset target pressure, so as to realize closed-loop servo pressure regulation.

[0007] In some technical solutions provided in this application, the manual adjustment unit is used to control the opening degree of the first manual valve and the second manual valve based on the manual adjustment command. The control terminal includes: an operating component and a touch screen. The operating component is used to generate a pulse signal through movement. The pulse signal is used to generate a manual adjustment command. The touch screen is used to display a virtual control. The virtual control is used to generate a digital signal when touched. The digital signal is used to form a manual adjustment command.

[0008] In some of the technical solutions provided in this application, the control module also includes a fault detection unit. When the servo adjustment unit malfunctions, the fault detection unit sends an alarm signal to the control terminal and switches to the manual adjustment unit for testing.

[0009] In some technical solutions provided in this application, the first oil supply pipeline includes: a first manual pipeline and a first servo pipeline. The first manual pipeline is connected to the first oil circuit, and a first manual valve is located on the first manual pipeline. Both ends of the first servo pipeline are connected to the first manual pipeline and the first oil circuit, respectively, and a first servo valve is located on the first servo pipeline. The second oil supply pipeline includes: a second manual pipeline and a second servo pipeline. The second manual pipeline is connected to the second oil circuit, and a second manual valve is located on the second manual pipeline. Both ends of the second servo pipeline are connected to the second manual pipeline and the second oil circuit, respectively, and a second servo valve is located on the second servo pipeline.

[0010] In some of the technical solutions provided in this application, the control module further includes: a pressure gauge, which is installed on the first manual pipeline and the second manual pipeline respectively, and the pressure gauge is used to display the pressure of the first manual pipeline and the second manual pipeline.

[0011] In some of the technical solutions provided in this application, an explosion-proof monitoring component is provided inside the isolation chamber. The explosion-proof monitoring component includes an oil and gas concentration sensor and an exhaust fan. The oil and gas concentration sensor is used to detect the gas concentration inside the isolation chamber. The exhaust fan is communicatively connected to the control module. The control module is also used to activate the exhaust fan and close the first valve and the second valve when the gas concentration exceeds the safety threshold.

[0012] In some technical solutions provided in this application, the oil supply module further includes: two oil pumps and two drive units. The two oil pumps are respectively connected to the first oil supply pipeline and the second oil supply pipeline. The two drive units are respectively connected to the first valve and the second valve. The drive units are used to receive the opening signal from the control module and control the opening degree of the first valve or the second valve.

[0013] In some of the technical solutions provided in this application, the nozzle batch testing device further includes: an oil tank, an oil collection trough, and a return oil pipeline. The oil tank is connected to the oil supply module and is used to hold the test oil. The oil collection trough is located on the outlet side of the nozzle and is used to receive the test oil sprayed out by the nozzle. The two ends of the return oil pipeline are connected to the oil collection trough and the oil tank, respectively.

[0014] Compared with related technologies, the present invention has at least the following beneficial effects: The nozzle batch testing device connects to the nozzle's dual oil circuits via dual oil supply lines, simulating the nozzle's real-world usage on the APU. Compared to traditional single-channel testing devices, this improves APU nozzle compatibility, enabling independent oil supply testing of the nozzle's dual oil circuits and enhancing the flexibility and accuracy of nozzle testing. Furthermore, the multiple output ports allow for simultaneous or batch testing of multiple nozzles, enabling testers to uniformly install nozzles in batches, simplifying the installation and replacement process for different nozzles and significantly improving testing efficiency. The wireless communication module, working in conjunction with an external control terminal, isolates the nozzle from the operator, enabling remote control and preventing operator exposure to hazardous testing environments, thus improving testing safety. This safer testing method extends operator working time, allowing for extended batch nozzle testing and further improving testing efficiency, resulting in comprehensive optimization of nozzle testing in multiple aspects. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of some embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 One of the schematic diagrams of a nozzle batch testing device provided in this application; Figure 2 This is a second schematic diagram of the structure of a nozzle batch testing device according to an embodiment of this application.

[0016] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows: 110. First oil supply line; 111. First valve; 1111. First servo valve; 1112. First manual valve; 120. Second oil supply line; 121. Second valve; 1211. Second servo valve; 1212. Second manual valve; 130. First manual line; 140. Second manual line; 150. First servo line; 160. Second servo line; 170. Oil pump; 180. Flow meter; 190. Oil outlet line; 200. Control module; 210. Servo adjustment unit; 211. Pressure sensor; 220. Manual adjustment unit; 221. Pressure gauge; 300. Control terminal; 310. Operating component; 320. Touch screen display; 400. Oil tank; 500. Oil collection trough; 600. Return line; 20. Nozzle; 21. First oil circuit; 22. Second oil circuit. Detailed Implementation

[0017] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0018] Embodiments of this application provide a batch testing device for nozzles of aircraft auxiliary power units, such as... Figure 1 and Figure 2 As shown, the nozzle 20 includes a first oil passage 21 and a second oil passage 22. The nozzle batch testing device includes an oil supply module, a control module 200, an isolation chamber, a control terminal 300, and a wireless communication module. The oil supply module includes a first oil supply line 110, a second oil supply line 120, and multiple output ports. Any output port is used to connect to the nozzle 20. The first oil supply line 110 and the second oil supply line 120 are respectively connected to the first oil passage 21 and the second oil passage 22 through the output ports. The first oil supply line 110 is equipped with a first valve 111, and the second oil supply line 120 is equipped with a second valve 121. The control terminal 300 is located outside the isolation chamber. The control module 200 is communicatively connected to the output ports, the first valve 111, and the second valve 121. The control module 200 is controlled by the control terminal 300 to control the on / off state of any output port and to adjust the opening degree of the first valve 111 and the second valve 121 to control the flow rate of the first oil supply line 110 and the second oil supply line 120. Nozzle 20 is located inside the isolation chamber. The wireless communication module is connected to both the control module 200 and the control terminal 300. The wireless communication module is used to establish a wireless data transmission link between the control module 200 and the control terminal 300.

[0019] In this embodiment, the nozzle 20 can be a fuel nozzle. The first oil passage 21 and the second oil passage 22 of the nozzle 20 form a dual oil passage structure with different pressure requirements (high and low pressure). Multiple output ports of the fuel supply module are connected to multiple nozzles 20 to be tested, enabling simultaneous or batch testing of multiple nozzles 20. For example, the number of output ports is 10. The first fuel supply line 110 and the second fuel supply line 120 are respectively connected to the first oil passage 21 and the second oil passage 22 of the nozzle 20 through output ports. The first fuel supply line 110 and the second fuel supply line 120 are independent of each other. The output pressure of the first fuel supply line 110 is greater than the output pressure of the second fuel supply line 120. The first fuel supply line 110 delivers high-pressure test oil to the nozzle 20 through the first oil passage 21, and the second fuel supply line 120 delivers low-pressure test oil to the nozzle 20 through the second oil passage 22. The first fuel supply line 110 and the second fuel supply line 120 are respectively equipped with a first valve 111 and a second valve 121.

[0020] The control module 200, the oil supply module, and the control terminal 300 are communicatively connected. For example, the control terminal 300 can be a console, and the control module 200 can be a PLC (Programmable Logic Controller). The operator generates control commands through the control terminal 300. After receiving the control commands from the control terminal 300, the control module 200 connects to the output port corresponding to the nozzle 20 to be tested, putting the nozzle 20 into the testing state. The control module 200 controls the test oil flow rate in the first oil supply line 110 by adjusting the opening of the first valve 111, and controls the test oil flow rate in the second oil supply line 120 by adjusting the opening of the second valve 121, enabling the nozzle batch testing device to independently control the test oil pressure in the first oil line 21 and the second oil line 22.

[0021] It should be noted that the test oil for the APU nozzle 20 is mostly a toxic, harmful, and volatile liquid containing benzene and sulfides. The isolation chamber provides a separate testing space for the nozzle 20, separating the control terminal 300 from the testing environment. The control terminal 300 transmits control commands to the control module 200 via a wireless data transmission link formed by the wireless communication module. This remote control mode isolates the operator from the hazardous testing environment, eliminating the risks of chemical inhalation and skin contact. The wireless communication module includes at least one of the following: a WiFi module, a Bluetooth module, a ZigBee module, or a 4G / 5G cellular communication module.

[0022] The nozzle batch testing device connects to the dual oil circuits of nozzle 20 via dual oil supply lines, simulating the actual usage of nozzle 20 on the APU. Compared to traditional single-channel testing devices, this improves the compatibility of APU nozzle 20, enabling independent oil supply testing of nozzle 20's dual oil circuits, thus enhancing the flexibility and accuracy of nozzle 20 testing. Furthermore, the multiple output ports allow for simultaneous or batch testing of multiple nozzles 20, enabling testers to uniformly install nozzles 20 for batch testing, simplifying the installation and replacement process for different nozzles 20 and significantly improving testing efficiency. The wireless communication module, in conjunction with the external control terminal 300, isolates the nozzle 20 from the operator, enabling remote control and preventing operator exposure to hazardous testing environments, thus improving testing safety. This safer testing method extends operator working time, allowing for extended batch testing of nozzle 20, further improving testing efficiency. This comprehensive optimization addresses various aspects of nozzle 20 testing for aircraft auxiliary power units.

[0023] In some embodiments provided in this application, such as Figure 1 As shown, the first valve 111 includes a first servo valve 1111 and a first manual valve 1112, and the second valve 121 includes a second servo valve 1211 and a second manual valve 1212. The control module 200 includes a servo adjustment unit 210 and a manual adjustment unit 220. The servo adjustment unit 210 is communicatively connected to the first servo valve 1111 and the second servo valve 1211, and is used to control the opening degree of the first servo valve 1111 and the second servo valve 1211. The manual adjustment unit 220 is communicatively connected to the first manual valve 1112 and the second manual valve 1212, and is used to control the opening degree of the first manual valve 1112 and the second manual valve 1212.

[0024] In this embodiment, the control module 200 is specified to have dual-mode control functions of servo and manual operation. The first oil supply line 110 is equipped with a first servo valve 1111 and a first manual valve 1112, and the second oil supply line 120 is equipped with a second servo valve 1211 and a second manual valve 1212. These two sets of valves constitute the actuators for the dual-mode control of the two oil supply lines. The servo valves and manual valves are adapted to different test scenarios, balancing the efficiency of automated testing with the flexibility of manual adjustment, and adapting to multi-condition testing requirements. For example, the first servo valve 1111 and the second servo valve 1211 can be electro-hydraulic servo valves, characterized by fast response speed and high adjustment accuracy. The first manual valve 1112 and the second manual valve 1212 can be electric manual regulating valves, balancing the stability of mechanical adjustment with the convenience of remote control.

[0025] The servo adjustment unit 210 and manual adjustment unit 220 of the control module 200 operate independently and mutually exclusively. When the control module 200 is in automatic test mode, it activates the servo adjustment unit 210 to dynamically adjust the opening of the first servo valve 1111 and the second servo valve 1211. When the control module 200 is in manual test mode, it activates the manual adjustment unit 220 to control the opening of the first manual valve 1112 and the second manual valve 1212. The two sets of adjustment units independently control their corresponding valves, achieving redundant control mode settings and improving the flexibility and reliability of nozzle 20 testing.

[0026] Servo valves and manual valves are deployed independently, with two sets of regulating units independently driving the corresponding valves, reducing control complexity. Compared to a dual-control mode with a single valve, this avoids the need to design signal switching and anti-interference logic, reduces the risk of control signal conflicts, makes control commands more direct, and improves regulation response speed. Furthermore, it prevents test interruptions caused by a single valve failure, significantly improving the reliability of the testing process.

[0027] In some embodiments provided in this application, such as Figure 1 As shown, the servo adjustment unit 210 includes a servo driver and a pressure sensor 211. The servo driver is communicatively connected to the first servo valve 1111 and the second servo valve 1211, respectively. The pressure sensor 211 is respectively installed in the first oil supply line 110 and the second oil supply line 120. The pressure sensor 211 is used to collect the real-time pressure of the first oil supply line 110 and the second oil supply line 120 and feed it back to the servo driver. The servo driver is used to control the opening degree of the first servo valve 1111 and the second servo valve 1211 according to the real-time pressure and the preset target pressure, so as to realize closed-loop servo pressure regulation.

[0028] In this embodiment, the operator issues a control command containing the target pressure via the control terminal 300. The pressure sensor 211 collects the real-time pressure of the test oil in the first oil supply line 110 and the second oil supply line 120. After receiving the real-time pressure, the servo driver compares the target pressure with the real-time pressure fed back by the pressure sensor 211. Based on the comparison result, the servo driver dynamically adjusts the opening of the first servo valve 1111 and the second servo valve 1211 to make the real-time pressure the same as the target pressure. Specifically, when the real-time pressure is lower than the target pressure, the servo driver increases the valve opening to increase the oil supply flow and raise the line pressure; when the real-time pressure is higher than the target pressure, the servo driver decreases the valve opening to reduce the flow and lower the line pressure.

[0029] A closed-loop control circuit is constructed through a cyclic feedback mechanism to compensate for pipeline pressure fluctuations in real time, ensuring stable pressure parameters during the test, improving the accuracy and repeatability of test data, avoiding subjective bias and operational errors caused by manual operation, and ensuring that the pressure of the two oil supply pipelines remains stable at the target value, thus meeting the stringent test pressure requirements of the Civil Aviation APU Nozzle 20.

[0030] In some embodiments provided in this application, such as Figure 2 As shown, the manual adjustment unit 220 is used to control the opening degree of the first manual valve 1112 and the second manual valve 1212 based on the manual adjustment command. The control terminal 300 includes: an operating element 310 and a touch screen 320. The operating element 310 is used to generate a pulse signal through movement. The pulse signal is used to generate a manual adjustment command. The touch screen 320 is used to display a virtual control. When the virtual control is touched, it generates a digital signal. The digital signal is used to form a manual adjustment command.

[0031] In this embodiment, the operation mode of the control terminal 300 is clearly defined. The operating component 310 can be a physical knob, which acts as a pulse generator, generating a pulse signal for each rotation. The touch screen 320 is located on the host computer, and the virtual controls can be buttons or sliders on the host computer interface. Operators generate digital commands through the virtual controls. The control module 200 receives manual adjustment commands formed by pulse signals or digital commands, calculates the opening degree of the first valve 111 or the second valve 121 through its internal program, and sets opening thresholds for the first valve 111 and the second valve 121. The opening thresholds include a maximum threshold and a minimum threshold to avoid mechanical overload. The operating component 310 and the touch screen 320 form a dual-redundant control mode, serving as backups for each other to prevent single control path failures, meet the usage habits of different operators, and improve the convenience of remote manual adjustment.

[0032] For example, when the operator rotates the knob by one increment, the knob generates one pulse. The control module 200 accumulates the number of pulses, the program calculates the target opening degree to be 30°, the control module 200 outputs 30 pulses, the drive unit rotates 30 steps, and the valve opening degree is adjusted by 5%.

[0033] For example, the operator inputs a target pressure of 100 PSI into the host computer, and the control module 200 calls the opening mapping table to calculate and send 30 pulses to drive the valve to adjust the opening.

[0034] For example, the control module 200 transmits real-time data of parameters such as valve opening and system pressure back to the control terminal 300 for display.

[0035] In some embodiments provided in this application, the control module 200 further includes a fault detection unit. When the servo adjustment unit 210 malfunctions, the fault detection unit sends an alarm signal to the control terminal 300 and switches to the manual adjustment unit 220 for testing.

[0036] In this embodiment, when the fault detection unit confirms that the servo adjustment unit 210 is in a faulty state, it sends an alarm signal to the control terminal 300. The alarm signal includes audible and visual signals to facilitate a quick response from the operator. Furthermore, the fault detection unit automatically switches to the manual adjustment unit 220 to continue testing, ensuring seamless testing and meeting the high continuity requirements of civil aviation equipment testing. This prevents test interruptions or damage to the nozzle 20 caused by servo unit failure.

[0037] In some embodiments provided in this application, such as Figure 1 As shown, the first oil supply line 110 includes: a first manual line 130 and a first servo line 150. The first manual line 130 is connected to the first oil passage 21. A first manual valve 1112 is located in the first manual line 130. The two ends of the first servo line 150 are connected to the first manual line 130 and the first oil passage 21, respectively. A first servo valve 1111 is located in the first servo line 150. The second oil supply line 120 includes: a second manual line 140 and a second servo line 160. The second manual line 140 is connected to the second oil passage 22. A second manual valve 1212 is located in the second manual line 140. The two ends of the second servo line 160 are connected to the second manual line 140 and the second oil passage 22, respectively. A second servo valve 1211 is located in the second servo line 160.

[0038] In this embodiment, the inlet ends of the first manual pipeline 130 and the second manual pipeline 140 are used to input test oil, and their outlet ends are connected to the first oil circuit 21 and the second oil circuit 22, respectively. The two ends of the first servo pipeline 150 are connected to the first manual pipeline 130 and the first oil circuit 21, respectively. The inlet end of the first servo pipeline 150 is located upstream of the first manual valve 1112. The first manual pipeline 130 and the first servo pipeline 150 are connected in parallel to form a dual control branch of the first oil circuit 21. The two ends of the second servo pipeline 160 are connected to the second manual pipeline 140 and the second oil circuit 22, respectively. The inlet end of the second servo pipeline 160 is located upstream of the second manual valve 1212. The second manual pipeline 140 and the second servo pipeline 160 are connected in parallel to form a dual control branch of the second oil circuit 22.

[0039] When the control module 200 activates the manual control mode, the first manual pipeline 130 and the second manual pipeline 140 are connected, while the first servo pipeline 150 and the second servo pipeline 160 are closed. Test oil enters the nozzle 20 through the manual pipeline. When the control module 200 activates the automatic control mode, the first manual pipeline 130 and the second manual pipeline 140 are closed, while the first servo pipeline 150 and the second servo pipeline 160 are connected. Test oil enters the nozzle 20 through the servo pipeline.

[0040] The manual and servo pipelines are arranged independently and operate mutually exclusively, eliminating the mixing of high and low pressure oils from the pipeline structure, ensuring the pressure independence of the first oil line 21 and the second oil line 22, and ensuring the independence and reliability of the dual oil supply pipeline control.

[0041] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the control module 200 also includes a pressure gauge 221, which is installed on the first manual pipeline 130 and the second manual pipeline 140 respectively. The pressure gauge 221 is used to display the pressure of the first manual pipeline 130 and the second manual pipeline 140.

[0042] In this embodiment, by setting a pressure gauge 221 in the manual pipeline, the real-time pressure of the first manual pipeline 130 and the second manual pipeline 140 in manual adjustment mode can be displayed intuitively, providing a visual reference for the operator's manual adjustment, improving the accuracy of manual adjustment, and improving the reliability of the device.

[0043] In some embodiments provided in this application, such as Figure 2 As shown, the isolation chamber is equipped with an explosion-proof monitoring component, which includes an oil and gas concentration sensor and an exhaust system. The oil and gas concentration sensor is used to detect the gas concentration in the isolation chamber. The exhaust system is communicatively connected to the control module 200. The control module 200 is also used to activate the exhaust system and close the first valve 111 and the second valve 121 when the gas concentration exceeds the safety threshold.

[0044] In this embodiment, the gas concentration is the concentration of harmful gases. An oil-gas concentration sensor is used to detect the content of harmful gases in the isolation chamber in real time. The control module 200 receives the gas concentration data collected by the oil-gas concentration sensor to monitor the test status within the isolation chamber. When the gas concentration exceeds a safety threshold, it indicates a leak has occurred in the isolation chamber. The control module 200 activates the exhaust system and pushes an over-limit alarm signal to the control terminal 300. Simultaneously, it closes the first valve 111 and the second valve 121 to achieve explosion-proof safety protection during the test process.

[0045] In some embodiments provided in this application, such as Figure 1 and Figure 2As shown, the oil supply module also includes two oil pumps 170 and two drive units. The two oil pumps 170 are respectively connected to the first oil supply line 110 and the second oil supply line 120. The two drive units are respectively connected to the first valve 111 and the second valve 121. The drive units are used to receive the opening signal from the control module 200 and control the opening of the first valve 111 or the second valve 121.

[0046] In this embodiment, two oil pumps 170 supply test oil to the first oil supply line 110 and the second oil supply line 120 respectively through the first manual line 130 and the second manual line 140. The oil pumps 170 receive switching signals from the control module 200 to ensure the supply of test oil. The two oil pumps 170 provide power to the first oil supply line 110 and the second oil supply line 120 respectively, achieving independent supply and regulation of the two pressure lines.

[0047] The driving component can be a stepper motor, connected to the valve core of the first valve 111 or the second valve 121. Upon receiving a pulse signal, the driving component rotates slightly, for example, by an angle of 1.8°. This rotation drives the valve core to change the opening degree of the first valve 111 or the second valve 121, controlling the oil flow and pressure. Configuring a dedicated driving component to control the valve opening degree improves the response speed and control accuracy of valve adjustment, ensuring the stability of valve opening adjustment.

[0048] For example, the outlets of the two oil pumps 170 are connected to the oil outlet pipeline 190, and the output ends of the oil outlet pipeline 190 are respectively connected to the first manual pipeline 130 and the second manual pipeline 140. The high-pressure test oil and the low-pressure test oil are independently transported in two independent channels separated within the oil outlet pipeline 190. The oil outlet pipeline 190 is equipped with a flow meter 180 for collecting the flow rate of the test oil, and the flow meter 180 can be a turbine flow meter.

[0049] In some embodiments provided in this application, such as Figure 2 As shown, the nozzle batch testing device also includes: an oil tank 400, an oil collection trough 500, and a return oil pipeline 600. The oil tank 400 is connected to the oil supply module and is used to hold the test oil. The oil collection trough 500 is located on the outlet side of the nozzle 20 and is used to receive the test oil sprayed out by the nozzle 20. The two ends of the return oil pipeline 600 are connected to the oil collection trough 500 and the oil tank 400, respectively.

[0050] In this embodiment, the test oil in the oil tank 400 is pumped to the oil supply module by the oil pump 170, sprayed out through the nozzle 20, falls into the oil collection tank 500, and returns to the oil tank 400 through the return oil pipeline 600, forming a closed-loop oil circuit to achieve the recycling of test oil and reduce the consumption cost of test oil. Furthermore, the oil collection tank 500 receives the oil sprayed from the nozzle 20, preventing oil leakage and contamination of the testing environment, and also facilitates the collection of oil samples after spraying, aiding in the assessment of the atomization effect and flow characteristics of the nozzle 20.

[0051] In some embodiments provided in this application, the maximum output pressure of the first oil supply line 110 is 1000 PSI, and the maximum output pressure of the second oil supply line 120 is 300 PSI.

[0052] In this embodiment, the dual oil supply pressure range of the oil supply module is clearly defined, accurately matching the working pressure requirements of the dual oil circuit of the civil aviation APU nozzle 20, realizing the simulation test of the nozzle 20 under all working conditions, and enabling the nozzle batch testing device to be compatible with the testing requirements of various mainstream civil aviation APU models, and applicable to the testing scenarios of different models of civil aviation / military aircraft APUs or engines.

[0053] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] The above are merely some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A batch testing device for nozzles of an aircraft auxiliary power unit, characterized in that, The nozzle includes a first oil passage and a second oil passage, and the nozzle batch testing device includes: The oil supply module includes: a first oil supply line, a second oil supply line, and multiple output ports. Any one of the output ports is used to connect to a nozzle. The first oil supply line and the second oil supply line are respectively connected to the first oil circuit and the second oil circuit through the output port. The first oil supply line is provided with a first valve, and the second oil supply line is provided with a second valve. An isolation chamber, wherein the nozzle is located inside the isolation chamber; The control terminal is located outside the isolation chamber; The control module is communicatively connected to the output port, the first valve, and the second valve, respectively. The control module is controlled by the control terminal to control the on / off state of any of the output ports and to adjust the opening degree of the first valve and the second valve to control the flow rate of the first oil supply line and the second oil supply line. The wireless communication module is communicatively connected to both the control module and the control terminal, and is used to establish a wireless data transmission link between the control module and the control terminal.

2. The nozzle batch testing device for aircraft auxiliary power units according to claim 1, characterized in that, The first valve includes a first servo valve and a first manual valve, the second valve includes a second servo valve and a second manual valve, and the control module includes: A servo control unit is communicatively connected to the first servo valve and the second servo valve, respectively, and the servo control unit is used to control the opening degree of the first servo valve and the second servo valve; The manual adjustment unit is communicatively connected to the first manual valve and the second manual valve, respectively, and is used to control the opening degree of the first manual valve and the second manual valve.

3. The nozzle batch testing device for aircraft auxiliary power units according to claim 2, characterized in that, The servo adjustment unit includes: A servo driver is communicatively connected to the first servo valve and the second servo valve, respectively. Pressure sensors are respectively installed in the first oil supply line and the second oil supply line. The pressure sensors are used to collect the real-time pressure of the first oil supply line and the second oil supply line and feed it back to the servo driver. The servo driver is used to control the opening degree of the first servo valve and the second servo valve according to the real-time pressure and the preset target pressure to realize closed-loop servo pressure regulation.

4. The nozzle batch testing device for aircraft auxiliary power units according to claim 2, characterized in that, The manual adjustment unit is used to control the opening degree of the first manual valve and the second manual valve based on manual adjustment commands, and the control terminal includes: An operating element, the operating element being used to generate a pulse signal through motion, the pulse signal being used to generate the manual adjustment command; A touch display screen is used to display virtual controls, which generate digital signals when touched, and the digital signals are used to form the manual adjustment command.

5. The nozzle batch testing device for aircraft auxiliary power units according to claim 2, characterized in that, The control module also includes: When the servo adjustment unit malfunctions, the fault detection unit sends an alarm signal to the control terminal and switches to the manual adjustment unit for testing.

6. The nozzle batch testing device for aircraft auxiliary power units according to claim 2, characterized in that, The first oil supply line includes: The first manual pipeline is connected to the first oil circuit, and the first manual valve is located on the first manual pipeline; The first servo pipeline has its two ends connected to the first manual pipeline and the first oil circuit, respectively, and the first servo valve is located in the first servo pipeline. The second oil supply line includes: The second manual pipeline is connected to the second oil circuit, and the second manual valve is located on the second manual pipeline; The second servo pipeline has its two ends connected to the second manual pipeline and the second oil circuit, respectively, and the second servo valve is located in the second servo pipeline.

7. The nozzle batch testing device for aircraft auxiliary power units according to claim 6, characterized in that, The control module also includes: Pressure gauges are installed on the first manual pipeline and the second manual pipeline, respectively, and the pressure gauges are used to display the pressure of the first manual pipeline and the second manual pipeline.

8. The nozzle batch testing apparatus for aircraft auxiliary power units according to any one of claims 1 to 7, characterized in that, The isolation chamber is equipped with an explosion-proof monitoring component, which includes: An oil and gas concentration sensor is used to detect the gas concentration inside the isolation chamber; The exhaust fan is communicatively connected to the control module, which is also used to activate the exhaust fan and close the first and second valves when the gas concentration exceeds a safety threshold.

9. The nozzle batch testing apparatus for aircraft auxiliary power units according to any one of claims 1 to 7, characterized in that, The oil supply module also includes: Two oil pumps are connected to the first oil supply line and the second oil supply line, respectively; Two actuators are connected to the first valve and the second valve respectively. The actuators are used to receive the opening signal from the control module and control the opening degree of the first valve or the second valve.

10. The nozzle batch testing apparatus for aircraft auxiliary power units according to any one of claims 1 to 7, characterized in that, Also includes: An oil tank, connected to the oil supply module, is used to hold test oil. An oil collection tank is provided on the outlet side of the nozzle, and the oil collection tank is used to collect the test oil sprayed out by the nozzle; The return oil pipeline has its two ends connected to the oil collection tank and the oil tank, respectively.

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