A turbo-propeller aircraft propeller slip accessory detection device and detection method

Abstract

The present application belongs to the field of aviation technology test flight test, and particularly relates to a turbo propeller aircraft propeller accessory detection device and a detection method. The device comprises a power module, an output display module, a logic control module and a connecting device. The power module is connected with the output display module, the logic control module and the connecting device. The output display module is connected with the logic control module and the connecting device. The logic control module is connected with the connecting device. The present application can simulate the working condition of electrical control equipment in the actual test process, and can determine the working condition of the propeller system electrical accessory through the corresponding indicator light and display without test. The accessory is non-off-site checked. The device can find the working state of the equipment before the first test inspection, so that the safety accidents can be reduced to a certain extent.

Description

Technical Field

[0001] This invention belongs to the field of aviation technology flight test, specifically relating to a device and method for detecting feathering accessories of turboprop aircraft. Background Technology

[0002] The power of a turboprop aircraft mainly comes from the thrust generated by the rotation and pitch change of the propeller blades. The magnitude of the thrust depends on the size of the blade pitch angle. In emergencies, such as engine failure causing in-flight shutdown, if the blade angle is too small, the faulty engine blades will generate enormous drag, causing uneven power distribution on both sides of the aircraft. This seriously endangers flight safety and can easily lead to a crash. Therefore, the proper functioning of the engine feathering system is crucial to flight safety.

[0003] Engine feathering system function checks are generally performed according to prescribed procedures during ground engine testing. The checks typically include two aspects: 1. Feathering control system function check (referred to as feathering check), which only checks the electrical control components (without stopping the engine or feathering); 2. Engine feathering check, which includes four feathering methods: negative thrust feathering, manual feathering, automatic feathering, and emergency feathering. The first three feathering methods are primarily performed by the electrical control components, while the fourth is a mechanical mode.

[0004] The testing and inspection of the feathering system requires a high level of professional competence from the operators. Improper operation can cause the engine to overheat and be damaged. Testing necessitates collaboration among multiple trades and specialties, demanding excellent teamwork and coordination. Faults in the control system, delayed personnel response, and operational errors during testing can easily lead to engine damage. Summary of the Invention

[0005] The purpose of this invention

[0006] This invention overcomes the shortcomings of existing inspection technologies and provides a device and method for simulating the feathering accessory inspection of turboprop aircraft under test conditions, without test runs and with accessories in place. This invention can determine the operational status of the feathering system's electrical accessories by simulating the operation of electrical control equipment during actual test runs, using corresponding indicator lights and displays. This eliminates the need for test runs and ensures the accessories are not removed from their positions. The device can detect the equipment's operational status early in the initial test run inspection, allowing for proactive intervention and reducing the occurrence of safety accidents to some extent.

[0007] Technical solution

[0008] A feathering accessory detection device for turboprop aircraft includes a power module, an output display module, a logic control module, and a connection device. The power module is connected to the output display module, the logic control module, and the connection device. The output display module is connected to the logic control module and the connection device. The logic control module is connected to the connection device.

[0009] Furthermore, the power module includes: a battery capacity display module, a busbar, fuses, a circuit breaker, and a battery pack. One end of the battery capacity display module is connected to the busbar, and the other end of the battery capacity display module is grounded. The busbar is connected to fuses No. 1 to No. 5. The busbar is connected to one end of the battery pack through the circuit breaker, and the other end of the battery pack is grounded.

[0010] The busbar supplies power to the normally open terminal of switch 72, the common terminal of switch 137, the second common terminal of switch 134, the common terminal of some feathering switches, the common terminal of the negative tension / pressure signal switch, the common terminal of the timing mechanism self-test switch, the coil of time delay relay A1, the coil of time delay relay A2, the common terminal of the first and third pairs of contacts of relay J7, the common terminal of the first pair of contacts of relay J8, and the positive terminal of the coil of relay J9 through fuse No. 1.

[0011] The busbar supplies power to the common terminal of the tester self-test switch, the common terminal of the four pairs of contacts of relay J4, the common terminal of the third pair of contacts of relay J5, the current-limiting resistor, and the common terminal of the second pair of contacts of relay J6 in the logic control module via fuse No. 2.

[0012] The busbar supplies power to the CZ1 connector in the connection device via fuse No. 3;

[0013] The busbar supplies power to the common terminal of the third pair of contacts of relay J6 in the logic control module via fuse No. 4;

[0014] The busbar supplies power to the delay relays A1 and A2 and the timer in the logic control module via fuse No. 5.

[0015] Furthermore, the output display module includes signal indicator lights XD1-XD10, a front panel, a timing display module, XD1, XD4, XD6, and XD8 as red positioning indicator lights, XD2 as a blue positioning indicator light, XD3, XD9, and XD10 as green positioning indicator lights, and XD5 as a white positioning indicator light. The signal indicator lights XD1-XD10 are arranged sequentially on the front panel of the detection device. One end of signal indicator light XD1 is connected to pin 12 of connector CZ1 in the connection device and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module via a signal isolation diode. Signal indicator light XD1... One end of the signal indicator XD2 is grounded; one end of the signal indicator XD2 is connected to pin 16 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of the signal indicator XD2 is grounded; one end of the signal indicator XD3 is connected to pin 15 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of the signal indicator XD3 is grounded; one end of the signal indicator XD4 is connected to pin 17 of connector CZ1 in the connection device, and is connected to the normally open terminal of relay J4 in the logic control module through a signal isolation diode. The normally open terminals of the second pair of contacts of relay J4 are connected, and the other end of signal indicator XD4 is grounded; one end of signal indicator XD5 is connected to pin 5 of connector CZ1 in the connecting device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD5 is grounded; one end of signal indicator XD6 is connected to the normally open contact of switch 72 in the logic control module, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD6 is grounded; one end of signal indicator XD7 is connected to the logic control module through a signal isolation diode. The normally open terminals of the second pair of contacts of relay J4 in the logic control module are connected to the CZ4 connector in the connection device, and the other end of the signal indicator XD7 is grounded; one end of the signal indicator XD8 is connected to the normally open terminal of the first pair of contacts of relay J7 in the logic control module through a signal isolation diode, and the other end is grounded; one end of the signal indicator XD9 is connected to the normally open terminal of the third pair of contacts of relay J3 in the logic control module, and the other end is grounded; one end of the signal indicator XD10 is connected to the positive terminal of the coil of relay J2 in the logic control module through a signal isolation diode, and is connected to the output terminal of the time delay relay A1 in the logic control module, and the other end is grounded;

[0016] The timing display module is also located on the front panel. The positive power supply terminal of the timing display module is connected to fuse No. 5, the negative power supply terminal of the timing display module is grounded, the positive voltage trigger terminal of the timing display module is connected to fuse No. 5, the negative voltage trigger terminal of the timing display module is connected to the common terminal of the third pair of contacts of relay J8 in the logic control module, the positive current trigger terminal of the timing display module is connected to the normally open terminal of the third pair of contacts of relay J6 in the logic control module, and the negative current trigger terminal of the timing display module is connected to the common terminal of the first pair of contacts of relay J6 in the logic control module.

[0017] Furthermore, the connection device includes connectors CZ1 to CZ4. Connecting holes numbered 1 to 22 are provided on connector CZ1. Hole 1 of connector CZ1 is connected to fuse #3 in the power module; hole 2 of connector CZ1 is connected to the 56° endpoint of the throttle angle switch in the logic control module; hole 3 of connector CZ1 is connected to the 30kg terminal of the torque feathering sensor switch in the logic control module; hole 4 of connector CZ1 is connected to the 10kg terminal of the torque feathering sensor switch in the logic control module; hole 6 of connector CZ1 is connected to the first normally open terminal of switch 137 in the logic control module; and hole 7 of connector CZ1 is connected to the normally open terminals of some feathering switches in the logic control module. The CZ1 connector is connected in the following ways: pin 7 is connected to the first and second normally open terminals of switch 137 in the logic control module via diodes; pin 8 is connected to the first normally open terminal of switch 134 in the logic control module; pin 9 is connected to the first normally closed contact of relay J2 in the logic control module; pin 10 is connected to the positive terminal of relay J1 coil in the logic control module; pin 10 is also connected to the second normally open terminal of switch 137 in the logic control module via diodes; pins 11, 18, and 22 of the CZ1 connector are grounded; pin 13 of the CZ1 connector is connected to the oil in the logic control module. The common terminal of the door angle switch is connected; pin 14 of the CZ1 connector is connected to the second normally open terminal of switch 134 in the logic control module, and the second normally open terminal of switch 134 is connected to the first common terminal; pin 19 of the CZ1 connector is connected to the first pair of normally open contacts of relay J3 in the logic control module; pin 19 of the CZ1 connector is also connected to the second pair of normally open contacts of relay J3 in the logic control module via a diode; pin 19 of the CZ1 connector is connected to the third pair of normally open contacts of relay J7 in the logic control module; pin 19 of the CZ1 connector is also connected to the signal indicator XD4 via a diode; pin 20 of the CZ1 connector is connected to the negative tension pressure signal of the logic control module. The normally open terminal of the device is connected; pin 21 of the CZ1 connector is connected to the negative terminal of the coil of relay J9 in the logic control module, and pins 21 and 22 of the CZ1 connector are shorted; the CZ2 connector has connection holes numbered 1 to 4, pin 1 of the CZ2 connector is grounded, pin 2 of the CZ2 connector is connected to the positive terminal of the coil of relay J8 in the logic control module and the normally open terminal of the first pair of contacts of relay J8, pin 2 of the CZ2 connector is connected to the normally open terminal of the self-test switch of the timing mechanism; pin 3 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J6 in the logic control module; pin 4 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J5 in the logic control module.The CZ3 connector has connection holes numbered 1 to 2. Hole 1 of the CZ3 connector is connected to the positive terminal of the battery pack in the power module via fuse 6 to charge the battery pack. Hole 2 of the CZ3 connector is grounded. The CZ4 connector also has connection holes numbered 1 to 2, and hole 2 of the CZ4 connector is grounded.

[0018] Furthermore, the logic control module includes: switches 72, 137, and 134; a throttle angle switch; a partial feathering switch; a torque feathering sensor switch; a negative tension pressure signal switch; a tester self-test switch; a timing mechanism self-test switch; time delay relays A1 and A2; relays J1 to J9; and a current-limiting resistor. The 0° terminal of the throttle angle switch is connected to the common terminal of the second pair of contacts of relay J3; the 40° terminal of the throttle angle switch is connected to the common terminal of the first pair of contacts of J3; and the 56°, 82°, and 105° terminals of the throttle angle switch are all connected to the torque... The common terminal of the feathering sensor switch is connected; the normally open terminal of the tester self-test switch is connected to the common terminal of relay J9; the normally closed terminal of relay J9 is connected to pin 2 of connector CZ2 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J1 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J4 via a diode and to the normally open terminal of the first set of contacts; the signal trigger A terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1; the signal trigger B terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1. The normally open terminals of time delay relay A2 are connected as follows: the positive terminal of time delay relay A2 is connected to fuse #5 of the power module, the negative terminal of time delay relay A2 is grounded, the coil D terminal of time delay relay A2 is connected to fuse #1, the coil C terminal of time delay relay A2 is connected to the positive terminal of the coil of relay J7, and the coil negative terminal of relay J7 is grounded. The signal trigger A terminal of time delay relay A1 is connected to the common terminal of the first pair of contacts of relay J1, the signal trigger B terminal of time delay relay A1 is connected to the normally open terminal of the first pair of contacts of relay J1, and the positive terminal of time delay relay A1 is connected to fuse #5 of the power module. The negative terminal of relay A1 is grounded. The coil D terminal of time delay relay A1 is connected to fuse No. 1. The coil C terminal of time delay relay A1 is connected to the positive terminal of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the common terminal of the second pair of contacts of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the normally open terminal of the third pair of contacts of relay J4 through a diode. The coil C terminal of time delay relay A1 is also connected to the positive terminal of relay J3 through a diode. The negative terminals of the coils of relays J1, J2, J3, J5, and J6 are grounded.

[0019] The common terminal of the first pair of contacts of relay J2 is grounded; the normally open terminal of the second pair of contacts of relay J2 is connected to the common terminal of the third pair of contacts of relay J3; the normally open terminal of the third pair of contacts of relay J3 is connected to the indicator light XD9; the negative terminal of the coil of relay J4 is connected to the common terminal of the second pair of contacts of relay J7; the normally open terminal of the second pair of contacts of relay J4 is connected to the indicator lights XD1 to XD8 via eight diodes; the normally open terminal of the fourth pair of contacts of relay J4 is connected to the positive terminal of the coil of relay J5; the normally open terminals of the first and second pairs of contacts of relay J5 are connected; the common terminal of the first pair of contacts of relay J5 is connected to the negative terminal of the coil of relay J8; the common terminal of the second pair of contacts of relay J5 is grounded; the normally open terminal of the third pair of contacts of relay J5 is connected to the positive terminal of the coil of relay J6; the normally open terminal of the first pair of contacts of relay J6 is grounded; the normally open terminal of the second pair of contacts of relay J7 is grounded; and the common terminal of the second pair of contacts of relay J8 is grounded.

[0020] The detection methods of the detection device include a method for detecting the feathering relay box using the detection device and a method for detecting the feathering timing mechanism using the detection device.

[0021] The testing method for the feathering relay box using a testing device includes:

[0022] (1) Test method for automatic torque feathering function: Set the throttle angle switch to 56°, set the automatic torque feathering sensor switch to 30Kg, and the positive power from the feathering relay box to the CZ1 connector 13 hole to power the throttle angle switch. The positive power from the throttle angle switch 56° to the CZ1 connector 2 hole to power the feathering relay box. The positive power from the feathering relay box through the CZ1 connector 15 hole to the signal indicator XD3. The signal indicator XD3 is lit, which indicates that the feathering ready function in the feathering relay box is normal.

[0023] Set the automatic torque feathering sensor switch to 10Kg. Positive current flows from the 56° endpoint of the throttle angle switch to the common terminal and the 10Kg terminal of the automatic torque feathering sensor switch, then to the 4 pins of the CZ1 connector, and finally to the feathering relay box, triggering the feathering circuit inside the feathering relay box.

[0024] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0025] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0026] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0027] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0028] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0029] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0030] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0031] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above phenomena are met, it indicates that the automatic feathering torque circuit of the feathering relay box is functioning correctly.

[0032] (2) Negative tension feathering function test method:

[0033] Set the throttle angle switch to 40° and press the negative thrust feathering sensor switch;

[0034] Positive current flows through the negative thrust feathering sensor switch to the coil of relay J3, activating relay J3. The current travels from the 40° throttle angle switch to the common and normally open terminals of the first pair of contacts of relay J3, then through pin 19 of connector CZ1 to the feathering relay box, triggering the negative thrust feathering signal.

[0035] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0036] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0037] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0038] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0039] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0040] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0041] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0042] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above phenomena are met, it indicates that the negative force feathering function circuit is functioning correctly.

[0043] (3) Partial feathering function test method

[0044] Press the partial feathering button, and positive power will flow from the partial feathering button switch to pin 7 of the CZ1 connector. At this time, you can hear the feathering contactor in the feathering relay box clicking, and the signal indicator XD2 will light up. If the above phenomena are met, it can be confirmed that the partial feathering function in the feathering relay box is normal.

[0045] (4) Test method for artificial feathering function

[0046] When switch 137 is switched to the feathering position, the positive current is split into two paths through the common terminal and the second normally open terminal of switch 137 via diodes. One path goes to pin 7 of connector CZ1. At this time, you can hear the feathering contactor clicking in the feathering relay box, and the signal indicator XD2 lights up.

[0047] Another path leads to pin 10 of the CZ1 connector, which then passes through pin 12 of the CZ1 connector to signal indicator XD1, causing XD1 to illuminate.

[0048] The feathering relay passes through pins 17 and 12 of the CZ1 connector, and the feathering relay box passes through pin 17 of the CZ1 connector to the signal indicator XD4. When the XD4 light is on, it indicates that the relevant circuit for the engine fault signal is normal.

[0049] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0050] If the above requirements are met, it can be confirmed that the manual feathering function in the feathering relay box is normal.

[0051] (5) Test method for automatic feathering torque check function

[0052] Set the throttle angle switch to 56° and the automatic feathering torque sensor switch to the 30Kg end. Positive power flows from the feathering relay box to pin 13 of the CZ1 connector to power the throttle angle switch. Positive power then flows through the 56° end of the throttle angle switch to pin 2 of the CZ1 connector to power the feathering relay box. Positive power then flows through the feathering relay box to pin 15 of the CZ1 connector and finally to indicator light XD3. When indicator light XD3 is lit, it indicates that the feathering ready function in the feathering relay box is working properly.

[0053] With the automatic feathering torque check switch 134 engaged and held, a positive current flows from the second common terminal and normally open terminal of switch 134 to pin 14 of connector CZ1, activating the feathering relay check in the feathering relay box. The feathering relay box supplies power to indicator light XD5 through pin 5 of connector CZ1, causing XD5 to illuminate while XD1 remains off.

[0054] Another positive current flows from the first normally open terminal and common terminal of switch 134 to the 8-hole connector of CZ1, causing the feathering ready relay in the feathering relay box to remain self-locking.

[0055] Set the automatic torque feathering sensor switch to the 10kg end. Positive current flows from the throttle angle switch to the 56° end, through the common terminal of the automatic torque feathering sensor switch, the 10kg end, to the 4th pin of the CZ1 connector, and then to the feathering relay box, triggering the feathering circuit inside the feathering relay box.

[0056] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0057] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0058] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0059] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0060] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0061] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0062] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above conditions are met, the automatic torque feathering check function inside the feathering relay box can be confirmed to be normal.

[0063] (6) Test method for negative tension and feathering function inspection

[0064] Set the throttle angle switch to 0° and press the negative pull feathering sensor switch; positive power flows from pin 20 of the CZ1 connector to the feathering relay box, and the feathering relay box supplies power to the indicator light XD4 through pin 17 of the CZ1 connector, causing XD4 to light up; if the above requirements are met, it can be confirmed that the negative pull feathering check function in the feathering relay box is normal.

[0065] The testing method for the feathering timing mechanism using a testing device is as follows:

[0066] Connect the detection device to the feathering timing mechanism using the CZ2 connector. Press the timing mechanism self-test button, and positive electricity will flow from the timing mechanism self-test button through the two holes of the CZ2 connector to the timing mechanism as a trigger signal for the timing mechanism to work.

[0067] Positive current flows through the common terminal and normally closed terminal of the third pair of contacts of relay J6 to the positive and negative terminals of the timing module current trigger. Then, it flows through the common terminal and normally closed terminal of the first pair of contacts of relay J6 to the 3rd pin of connector CZ2. The 3rd pin of connector CZ2 supplies power to the timing mechanism. The timing mechanism returns to negative through the 1st pin of connector CZ2, causing the timing mechanism to work. The current trigger terminal of the timing module detects the current and starts timing and displays the duration.

[0068] Positive current flows from the coil of relay J8 through the common terminal and normally closed terminal of the first pair of contacts of relay J5 to the 4th hole of connector CZ2, powering the micro switch of the timing mechanism. Positive current flows through the common terminal and normally closed terminal of the first pair of contacts of relay J8 to the coil of relay J8, and then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to the 4th hole of connector CZ2. The 4th hole of connector CZ2 powers the feathering timing mechanism. Positive current returns to negative from the 1st hole of connector CZ2, causing relay J8 to self-lock. Positive current flows through the voltage trigger terminal of the timing module to the normally open terminal and common terminal of relay J8, returning to negative. The voltage trigger terminal of the timer starts timing. The timer display module shows "U" duration 12±1s and "I" duration 15±1s. If the current is within the range of 0.8A to 1.5A, it indicates that the timing mechanism is working normally.

[0069] Before performing the testing methods for the featherer relay box and the featherer timing mechanism, the testing device is self-tested. The self-test method is as follows:

[0070] During device self-test, disconnect connectors CZ1 to CZ3, short-circuit pins 21 and 22 of connector CZ1, activate relay J9 in the logic control module, disable the tester's self-test switch function, and prevent the test device from damaging or misjudging the tested feathering relay box and feathering timing mechanism during self-test.

[0071] When the tester self-test switch is turned on, positive power flows through the busbar, fuse 2, and the tester self-test switch to the common and normally closed terminals of relay J9, dividing into three paths:

[0072] The first path goes through the diode to relay J1, making J1 work. After J1 works, the signal trigger points A and B of time delay relay A1 are shorted, and the signal trigger points A and B of A2 are shorted, making the two time delay relays start working.

[0073] After the time-delay relay A2 is activated, the coil terminals C and D are engaged for 12 seconds and then disconnected. Positive current flows from the coil terminal D through terminal C to the relay J7 coil, then returns to negative, and the relay J7 is activated for 12 seconds.

[0074] The second path goes through the diode to the coil of relay J8, then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to the common terminal and normally open terminal of the second pair of contacts of relay J5, returning to the negative direction, so that relay J8 can work.

[0075] The third path goes through the diode to the coil of relay J4, and then through the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to the negative direction to make relay J4 work.

[0076] The J4 relay has a self-locking function. Positive current flows through the common terminal and normally open terminal of the first pair of contacts of J4 to the J4 coil, and then to the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to negative. The self-locking time depends on the working time of relay J7, which is controlled by the time delay relay A2.

[0077] After relay J4 is activated, positive current flows from the common terminal and normally open terminal of the second pair of contacts of relay J4 to the diode and then to the indicator lights XD1 to XD8, illuminating the eight indicator lights to determine whether the eight indicator lights are working properly.

[0078] Signal indicator XD10 is the working indicator for time delay relay A1. When A1 is working, positive current flows from terminal D of the coil of A1 to terminal C and then to signal indicator XD10. When signal indicator XD10 is lit, it indicates that the signal light is working normally.

[0079] After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J2, returning to negative, and relay J2 is activated.

[0080] After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J3, activating relay J3. Positive current also flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, through the common terminal and normally open terminal of the third pair of contacts of relay J3, to the signal indicator XD9. The illumination of signal indicator XD9 indicates that relays J1-J8 and signal indicator XD9 are working normally. The illumination time of signal indicator XD9 is controlled by time delay relay A2, therefore signal indicator XD9 is used as the working indicator of time delay relay A2.

[0081] Positive current flows from the common terminal and normally open terminal of the fourth pair of contacts of relay J4 to the coil of relay J5, causing relay J5 to operate; positive current flows from the common terminal and normally open terminal of the third pair of contacts of relay J5 to the coil of relay J6, causing relay J6 to operate.

[0082] After relay J6 is activated, the positive current flows through the current-limiting resistor to the common terminal and normally open terminal of the second pair of contacts of relay J6, then to the current trigger terminal of the timing module, and finally to the common terminal and normally open terminal of the first pair of contacts of relay J6, returning to the negative, causing the timing module to start timing. The timing duration is controlled by the time delay relay A2.

[0083] After the time delay relay A1 is activated, the coil terminals C and D are energized for 12 seconds and then disengaged for 3 seconds. Positive current flows from the coil terminal C of the time delay relay A1 to the coils of relays J2 and J3, causing relays J2 and J3 to activate. The indicator light XD9 is off for the first 12 seconds, then illuminates for 3 seconds and then goes out, indicating that the time delay relay A1 is in the working state.

[0084] The self-test duration is controlled by time delay relays A1 and A2. The self-test process checks the functions of relays J1 to J8, as well as the functions of time delay relays A1 and A2, timing modules, and signal indicator lights.

[0085] Beneficial effects

[0086] This invention provides a testing device and method for feathering accessories of turboprop aircraft. Powered by a lithium battery pack, it is portable, requiring no removal of the tested equipment, and facilitates onboard operation. Before engine testing, it allows for pre-testing to determine the functionality of the feathering accessories, preventing potential serious consequences from malfunctions during testing. If a malfunction is detected during feathering inspection, the device can also provide a basis for diagnosing faults in the electrical control section of the feathering system. This device simulates the actual operation of the feathering electrical accessories as closely as possible, enabling simulation testing. The device also has a self-test function to determine its normal operating condition. Attached Figure Description

[0087] Figure 1 This is a structural principle block diagram of the device of the present invention;

[0088] Figure 2 This is a schematic diagram of the electrical structure of the present invention. Detailed Implementation

[0089] The invention will now be further described with reference to the accompanying drawings, such as... Figure 1 As shown, a feathering accessory detection device for turboprop aircraft is provided, including a power module, an output display module, a logic control module, and a connection device. The power module is connected to the output display module, the logic control module, and the connection device, respectively. The output display module is connected to the logic control module and the connection device, respectively. The logic control module is connected to the connection device.

[0090] The power module includes: a battery capacity display module, a busbar, fuses, a circuit breaker, and a battery pack. One end of the battery capacity display module is connected to the busbar, and the other end of the battery capacity display module is grounded. The busbar is connected to fuses No. 1 to No. 5. The busbar is connected to one end of the battery pack through the circuit breaker, and the other end of the battery pack is grounded.

[0091] The busbar supplies power to the normally open terminal of switch 72, the common terminal of switch 137, the second common terminal of switch 134, the common terminal of some feathering switches, the common terminal of the negative tension / pressure signal switch, the common terminal of the timing mechanism self-test switch, the coil of time delay relay A1, the coil of time delay relay A2, the common terminal of the first and third pairs of contacts of relay J7, the common terminal of the first pair of contacts of relay J8, and the positive terminal of the coil of relay J9 through fuse No. 1.

[0092] The busbar supplies power to the common terminal of the tester self-test switch, the common terminal of the four pairs of contacts of relay J4, the common terminal of the third pair of contacts of relay J5, the current-limiting resistor, and the common terminal of the second pair of contacts of relay J6 in the logic control module via fuse No. 2.

[0093] The busbar supplies power to the CZ1 connector in the connection device via fuse No. 3;

[0094] The busbar supplies power to the common terminal of the third pair of contacts of relay J6 in the logic control module via fuse No. 4;

[0095] The busbar supplies power to the delay relays A1 and A2 and the timer in the logic control module via fuse No. 5.

[0096] In this invention, the output display module includes signal indicator lights XD1 to XD10, a front panel, a timing display module, XD1, XD4, XD6, and XD8 as red indicator lights, XD2 as a blue indicator light, XD3, XD9, and XD10 as green indicator lights, and XD5 as a white indicator light. The signal indicator lights XD1 to XD10 are arranged sequentially on the front panel of the detection device. One end of signal indicator light XD1 is connected to pin 12 of connector CZ1 in the connection device and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module via a signal isolation diode. 1. The other end is grounded; one end of signal indicator XD2 is connected to pin 16 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD2 is grounded; one end of signal indicator XD3 is connected to pin 15 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD3 is grounded; one end of signal indicator XD4 is connected to pin 17 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode. The normally open terminal of the second pair of contacts of electrical appliance J4 is connected, and the other end of signal indicator XD4 is grounded; one end of signal indicator XD5 is connected to pin 5 of connector CZ1 in the connecting device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD5 is grounded; one end of signal indicator XD6 is connected to the normally open contact of switch 72 in the logic control module, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of signal indicator XD6 is grounded; one end of signal indicator XD7 is connected to the logic control module through a signal isolation diode. The normally open terminals of the second pair of contacts of relay J4 in the logic control module are connected to the CZ4 connector in the connection device, and the other end of the signal indicator XD7 is grounded; one end of the signal indicator XD8 is connected to the normally open terminal of the first pair of contacts of relay J7 in the logic control module through a signal isolation diode, and the other end is grounded; one end of the signal indicator XD9 is connected to the normally open terminal of the third pair of contacts of relay J3 in the logic control module, and the other end is grounded; one end of the signal indicator XD10 is connected to the positive terminal of the coil of relay J2 in the logic control module through a signal isolation diode, and is connected to the output terminal of the time delay relay A1 in the logic control module, and the other end is grounded;

[0097] The timing display module is also located on the front panel. The positive power supply terminal of the timing display module is connected to fuse No. 5, the negative power supply terminal of the timing display module is grounded, the positive voltage trigger terminal of the timing display module is connected to fuse No. 5, the negative voltage trigger terminal of the timing display module is connected to the common terminal of the third pair of contacts of relay J8 in the logic control module, the positive current trigger terminal of the timing display module is connected to the normally open terminal of the third pair of contacts of relay J6 in the logic control module, and the negative current trigger terminal of the timing display module is connected to the common terminal of the first pair of contacts of relay J6 in the logic control module.

[0098] In this invention, the connecting device includes CZ1 to CZ4 connectors. The CZ1 connector has connection holes numbered 1 to 22. Hole 1 of the CZ1 connector is connected to fuse #3 in the power module; hole 2 of the CZ1 connector is connected to the 56° endpoint of the throttle angle switch in the logic control module; hole 3 of the CZ1 connector is connected to the 30kg terminal of the torque feathering sensor switch in the logic control module; hole 4 of the CZ1 connector is connected to the 10kg terminal of the torque feathering sensor switch in the logic control module; hole 6 of the CZ1 connector is connected to the first normally open terminal of switch 137 in the logic control module; and hole 7 of the CZ1 connector is connected to a portion of the feathering switches in the logic control module. The normally open terminals of the CZ1 connector are connected, and pin 7 is also connected to the first and second normally open terminals of switch 137 in the logic control module via diodes; pin 8 of the CZ1 connector is connected to the first normally open terminal of switch 134 in the logic control module; pin 9 of the CZ1 connector is connected to the first normally closed terminal of relay J2 in the logic control module; pin 10 of the CZ1 connector is connected to the positive terminal of the coil of relay J1 in the logic control module; pin 10 of the CZ1 connector is also connected to the second normally open terminal of switch 137 in the logic control module via diodes; pins 11, 18, and 22 of the CZ1 connector are grounded; pin 13 of the CZ1 connector is connected to the normally closed terminal of relay J2 in the logic control module. The common terminal of the throttle angle switch is connected; pin 14 of the CZ1 connector is connected to the second normally open terminal of switch 134 in the logic control module, and the second normally open terminal of switch 134 is connected to the first common terminal; pin 19 of the CZ1 connector is connected to the first pair of normally open contacts of relay J3 in the logic control module; pin 19 of the CZ1 connector is also connected to the second pair of normally open contacts of relay J3 in the logic control module via a diode; pin 19 of the CZ1 connector is connected to the third pair of normally open contacts of relay J7 in the logic control module; pin 19 of the CZ1 connector is also connected to the signal indicator XD4 via a diode; pin 20 of the CZ1 connector is connected to the negative tension pressure signal of the logic control module. The normally open terminal of the device is connected; pin 21 of the CZ1 connector is connected to the negative terminal of the coil of relay J9 in the logic control module, and pins 21 and 22 of the CZ1 connector are shorted; the CZ2 connector has connection holes numbered 1 to 4, pin 1 of the CZ2 connector is grounded, pin 2 of the CZ2 connector is connected to the positive terminal of the coil of relay J8 in the logic control module and the normally open terminal of the first pair of contacts of relay J8, pin 2 of the CZ2 connector is connected to the normally open terminal of the self-test switch of the timing mechanism; pin 3 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J6 in the logic control module; pin 4 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J5 in the logic control module.The CZ3 connector has connection holes numbered 1 to 2. Hole 1 of the CZ3 connector is connected to the positive terminal of the battery pack in the power module via fuse 6 to charge the battery pack. Hole 2 of the CZ3 connector is grounded. The CZ4 connector also has connection holes numbered 1 to 2, and hole 2 of the CZ4 connector is grounded.

[0099] In this invention, the logic control module includes: switch 72, switch 137, switch 134, throttle angle switch, partial feathering switch, torque feathering sensor switch, negative tension pressure signal switch, tester self-test switch, timing mechanism self-test switch, time delay relays A1 and A2, relays J1 to J9, and current limiting resistor; the 0° terminal of the throttle angle switch is connected to the common terminal of the second pair of contacts of relay J3, the 40° terminal of the throttle angle switch is connected to the common terminal of the first pair of contacts of J3, and the 56°, 82°, and 105° terminals of the throttle angle switch are all connected to... The common terminal of the torque feathering sensor switch is connected; the normally open terminal of the tester self-test switch is connected to the common terminal of relay J9; the normally closed terminal of relay J9 is connected to pin 2 of connector CZ2 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J1 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J4 via a diode and to the normally open terminal of the first set of contacts; the signal trigger A terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1; the signal trigger B terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1. The normally open contacts of time delay relay A2 are connected. The positive terminal of time delay relay A2 is connected to fuse #5 of the power module, and the negative terminal of time delay relay A2 is grounded. The coil D terminal of time delay relay A2 is connected to fuse #1, and the coil C terminal of time delay relay A2 is connected to the positive terminal of the coil of relay J7. The coil negative terminal of relay J7 is grounded. The signal trigger A terminal of time delay relay A1 is connected to the common terminal of the first pair of contacts of relay J1, and the signal trigger B terminal of time delay relay A1 is connected to the normally open terminals of the first pair of contacts of relay J1. The positive terminal of time delay relay A1 is connected to fuse #5 of the power module. The negative terminal of relay A1 is grounded. The coil D terminal of time delay relay A1 is connected to fuse No. 1. The coil C terminal of time delay relay A1 is connected to the positive terminal of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the common terminal of the second pair of contacts of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the normally open terminal of the third pair of contacts of relay J4 through a diode. The coil C terminal of time delay relay A1 is also connected to the positive terminal of relay J3 through a diode. The negative terminals of the coils of relays J1, J2, J3, J5, and J6 are grounded.

[0100] The common terminal of the first pair of contacts of relay J2 is grounded; the normally open terminal of the second pair of contacts of relay J2 is connected to the common terminal of the third pair of contacts of relay J3; the normally open terminal of the third pair of contacts of relay J3 is connected to the indicator light XD9; the negative terminal of the coil of relay J4 is connected to the common terminal of the second pair of contacts of relay J7; the normally open terminal of the second pair of contacts of relay J4 is connected to the indicator lights XD1 to XD8 via eight diodes; the normally open terminal of the fourth pair of contacts of relay J4 is connected to the positive terminal of the coil of relay J5; the normally open terminals of the first and second pairs of contacts of relay J5 are connected; the common terminal of the first pair of contacts of relay J5 is connected to the negative terminal of the coil of relay J8; the common terminal of the second pair of contacts of relay J5 is grounded; the normally open terminal of the third pair of contacts of relay J5 is connected to the positive terminal of the coil of relay J6; the normally open terminal of the first pair of contacts of relay J6 is grounded; the normally open terminal of the second pair of contacts of relay J7 is grounded; and the common terminal of the second pair of contacts of relay J8 is grounded.

[0101] The present invention also provides a detection method using the detection device, including a method for detecting a feathering relay box using the detection device and a method for detecting a feathering timing mechanism using the detection device.

[0102] The method for testing the feathering relay box using a testing device includes:

[0103] (1) Test method for automatic torque feathering function: Set the throttle angle switch to 56°, set the automatic torque feathering sensor switch to 30Kg, and the positive power from the feathering relay box to the CZ1 connector 13 hole to power the throttle angle switch. The positive power from the throttle angle switch 56° to the CZ1 connector 2 hole to power the feathering relay box. The positive power from the feathering relay box through the CZ1 connector 15 hole to the signal indicator XD3. The signal indicator XD3 is lit, which indicates that the feathering ready function in the feathering relay box is normal.

[0104] Set the automatic torque feathering sensor switch to 10Kg. Positive current flows from the 56° endpoint of the throttle angle switch to the common terminal and the 10Kg terminal of the automatic torque feathering sensor switch, then to the 4 pins of the CZ1 connector, and finally to the feathering relay box, triggering the feathering circuit inside the feathering relay box.

[0105] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0106] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0107] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0108] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0109] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0110] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0111] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0112] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above phenomena are met, it indicates that the automatic feathering torque circuit of the feathering relay box is functioning correctly.

[0113] (2) Negative tension feathering function test method:

[0114] Set the throttle angle switch to 40° and press the negative thrust feathering sensor switch;

[0115] Positive current flows through the negative thrust feathering sensor switch to the coil of relay J3, activating relay J3. The current travels from the 40° throttle angle switch to the common and normally open terminals of the first pair of contacts of relay J3, then through pin 19 of connector CZ1 to the feathering relay box, triggering the negative thrust feathering signal.

[0116] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0117] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0118] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0119] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0120] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0121] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0122] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0123] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above phenomena are met, it indicates that the negative force feathering function circuit is functioning correctly.

[0124] (3) Partial feathering function test method

[0125] Press the partial feathering button, and positive power will flow from the partial feathering button switch to pin 7 of the CZ1 connector. At this time, you can hear the feathering contactor in the feathering relay box clicking, and the signal indicator XD2 will light up. If the above phenomena are met, it can be confirmed that the partial feathering function in the feathering relay box is normal.

[0126] (4) Test method for artificial feathering function

[0127] When switch 137 is switched to the feathering position, the positive current is split into two paths through the common terminal and the second normally open terminal of switch 137 via diodes. One path goes to pin 7 of connector CZ1. At this time, you can hear the feathering contactor clicking in the feathering relay box, and the signal indicator XD2 lights up.

[0128] Another path leads to pin 10 of the CZ1 connector, which then passes through pin 12 of the CZ1 connector to signal indicator XD1, causing XD1 to illuminate.

[0129] The feathering relay passes through pins 17 and 12 of the CZ1 connector, and the feathering relay box passes through pin 17 of the CZ1 connector to the signal indicator XD4. When the XD4 light is on, it indicates that the relevant circuit for the engine fault signal is normal.

[0130] The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal.

[0131] If the above requirements are met, it can be confirmed that the manual feathering function in the feathering relay box is normal.

[0132] (5) Test method for automatic feathering torque check function

[0133] Set the throttle angle switch to 56° and the automatic feathering torque sensor switch to the 30Kg end. Positive power flows from the feathering relay box to pin 13 of the CZ1 connector to power the throttle angle switch. Positive power then flows through the 56° end of the throttle angle switch to pin 2 of the CZ1 connector to power the feathering relay box. Positive power then flows through the feathering relay box to pin 15 of the CZ1 connector and finally to indicator light XD3. When indicator light XD3 is lit, it indicates that the feathering ready function in the feathering relay box is working properly.

[0134] With the automatic feathering torque check switch 134 engaged and held, a positive current flows from the second common terminal and normally open terminal of switch 134 to pin 14 of connector CZ1, activating the feathering relay check in the feathering relay box. The feathering relay box supplies power to indicator light XD5 through pin 5 of connector CZ1, causing XD5 to illuminate while XD1 remains off.

[0135] Another positive current flows from the first normally open terminal and common terminal of switch 134 to the 8-hole connector of CZ1, causing the feathering ready relay in the feathering relay box to remain self-locking.

[0136] Set the automatic torque feathering sensor switch to the 10kg end. Positive current flows from the throttle angle switch to the 56° end, through the common terminal of the automatic torque feathering sensor switch, the 10kg end, to the 4th pin of the CZ1 connector, and then to the feathering relay box, triggering the feathering circuit inside the feathering relay box.

[0137] There is a clicking sound from the feather pump contactor inside the feather relay box;

[0138] The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally.

[0139] The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal.

[0140] The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1.

[0141] The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends.

[0142] When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally.

[0143] After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out. If the above conditions are met, the automatic torque feathering check function inside the feathering relay box can be confirmed to be normal.

[0144] (6) Test method for negative tension and feathering function inspection

[0145] Set the throttle angle switch to 0° and press the negative pull feathering sensor switch; positive power flows from pin 20 of the CZ1 connector to the feathering relay box, and the feathering relay box supplies power to the indicator light XD4 through pin 17 of the CZ1 connector, causing XD4 to illuminate; if the above requirements are met, it can be confirmed that the negative pull feathering check function in the feathering relay box is normal.

[0146] The testing method for the feathering timing mechanism using a testing device is as follows:

[0147] Connect the detection device to the feathering timing mechanism using the CZ2 connector. Press the timing mechanism self-test button, and positive electricity will flow from the timing mechanism self-test button through the two holes of the CZ2 connector to the timing mechanism as a trigger signal for the timing mechanism to work.

[0148] Positive current flows through the common terminal and normally closed terminal of the third pair of contacts of relay J6 to the positive and negative terminals of the timing module current trigger. Then, it flows through the common terminal and normally closed terminal of the first pair of contacts of relay J6 to the 3rd pin of connector CZ2. The 3rd pin of connector CZ2 supplies power to the timing mechanism. The timing mechanism returns to negative through the 1st pin of connector CZ2, causing the timing mechanism to work. The current trigger terminal of the timing module detects the current and starts timing and displays the duration.

[0149] Positive current flows from the coil of relay J8 through the common terminal and normally closed terminal of the first pair of contacts of relay J5 to the 4th hole of connector CZ2, powering the micro switch of the timing mechanism. Positive current flows through the common terminal and normally closed terminal of the first pair of contacts of relay J8 to the coil of relay J8, and then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to the 4th hole of connector CZ2. The 4th hole of connector CZ2 powers the feathering timing mechanism. Positive current returns to negative from the 1st hole of connector CZ2, causing relay J8 to self-lock. Positive current flows through the voltage trigger terminal of the timing module to the normally open terminal and common terminal of relay J8, returning to negative. The voltage trigger terminal of the timer starts timing. The timer display module shows "U" duration 12±1s and "I" duration 15±1s. If the current is within the range of 0.8A to 1.5A, it indicates that the timing mechanism is working normally.

[0150] In addition, before performing the testing methods for the feathering relay box and the feathering timing mechanism, the testing device shall be self-tested. The self-test method is as follows:

[0151] During device self-test, disconnect connectors CZ1 to CZ3, short-circuit pins 21 and 22 of connector CZ1, activate relay J9 in the logic control module, disable the tester's self-test switch function, and prevent the test device from damaging or misjudging the tested feathering relay box and feathering timing mechanism during self-test.

[0152] When the tester self-test switch is turned on, positive power flows through the busbar, fuse 2, and the tester self-test switch to the common and normally closed terminals of relay J9, dividing into three paths:

[0153] The first path goes through the diode to relay J1, making J1 work. After J1 works, the signal trigger points A and B of time delay relay A1 are shorted, and the signal trigger points A and B of A2 are shorted, making the two time delay relays start working.

[0154] After the time-delay relay A2 is activated, the coil terminals C and D are engaged for 12 seconds and then disconnected. Positive current flows from the coil terminal D through terminal C to the relay J7 coil, then returns to negative, and the relay J7 is activated for 12 seconds.

[0155] The second path goes through the diode to the coil of relay J8, then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to the common terminal and normally open terminal of the second pair of contacts of relay J5, returning to the negative direction, so that relay J8 can work.

[0156] The third path goes through the diode to the coil of relay J4, and then through the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to the negative direction to make relay J4 work.

[0157] The J4 relay has a self-locking function. Positive current flows through the common terminal and normally open terminal of the first pair of contacts of J4 to the J4 coil, and then to the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to negative. The self-locking time depends on the working time of relay J7, which is controlled by the time delay relay A2.

[0158] After relay J4 is activated, positive current flows from the common terminal and normally open terminal of the second pair of contacts of relay J4 to the diode and then to the indicator lights XD1 to XD8, illuminating the eight indicator lights to determine whether the eight indicator lights are working properly.

[0159] Signal indicator XD10 is the working indicator for time delay relay A1. When A1 is working, positive current flows from terminal D of the coil of A1 to terminal C and then to signal indicator XD10. When signal indicator XD10 is lit, it indicates that the signal light is working normally.

[0160] After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J2, returning to negative, and relay J2 is activated.

[0161] After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J3, activating relay J3. Positive current also flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, through the common terminal and normally open terminal of the third pair of contacts of relay J3, to the signal indicator XD9. The illumination of signal indicator XD9 indicates that relays J1-J8 and signal indicator XD9 are working normally. The illumination time of signal indicator XD9 is controlled by time delay relay A2, therefore signal indicator XD9 is used as the working indicator of time delay relay A2.

[0162] Positive current flows from the common terminal and normally open terminal of the fourth pair of contacts of relay J4 to the coil of relay J5, causing relay J5 to operate; positive current flows from the common terminal and normally open terminal of the third pair of contacts of relay J5 to the coil of relay J6, causing relay J6 to operate.

[0163] After relay J6 is activated, the positive current flows through the current-limiting resistor to the common terminal and normally open terminal of the second pair of contacts of relay J6, then to the current trigger terminal of the timing module, and finally to the common terminal and normally open terminal of the first pair of contacts of relay J6, returning to the negative, causing the timing module to start timing. The timing duration is controlled by the time delay relay A2.

[0164] After the time delay relay A1 is activated, the coil terminals C and D are energized for 12 seconds and then disengaged for 3 seconds. Positive current flows from the coil terminal C of the time delay relay A1 to the coils of relays J2 and J3, causing relays J2 and J3 to activate. The indicator light XD9 is off for the first 12 seconds, then illuminates for 3 seconds and then goes out, indicating that the time delay relay A1 is in the working state.

[0165] The self-test duration is controlled by time delay relays A1 and A2. The self-test process checks the functions of relays J1 to J8, as well as the functions of time delay relays A1 and A2, timing modules, and signal indicator lights.

Claims

1. A feathering accessory detection device for turboprop aircraft, characterized in that, The device includes a power module, an output display module, a logic control module, and a connection device. The power module is connected to the output display module, the logic control module, and the connection device. The output display module is connected to the logic control module and the connection device. The logic control module is connected to the connection device. The power module includes a battery capacity display module, a busbar, fuses, a circuit breaker, and a battery pack. One end of the battery capacity display module is connected to the busbar, and the other end of the battery capacity display module is grounded. The busbar is connected to fuses numbered 1 to 5. The busbar is connected to one end of the battery pack through the circuit breaker, and the other end of the battery pack is grounded. The busbar supplies power to the normally open terminal of switch 72, the common terminal of switch 137, the second common terminal of switch 134, the common terminal of some feathering switches, the common terminal of the negative tension / pressure signal switch, the common terminal of the timing mechanism self-test switch, the coil of time delay relay A1, the coil of time delay relay A2, the common terminal of the first and third pairs of contacts of relay J7, the common terminal of the first pair of contacts of relay J8, and the positive terminal of the coil of relay J9 through fuse No.

1. The busbar supplies power to the common terminal of the tester self-test switch, the common terminal of the four pairs of contacts of relay J4, the common terminal of the third pair of contacts of relay J5, the current-limiting resistor, and the common terminal of the second pair of contacts of relay J6 in the logic control module via fuse No.

2. The busbar supplies power to the CZ1 connector in the connection device via fuse No. 3; The busbar supplies power to the common terminal of the third pair of contacts of relay J6 in the logic control module via fuse No. 4; The busbar supplies power to the delay relays A1 and A2 and the timer in the logic control module via fuse No.

5.

2. The feathering accessory detection device for turboprop aircraft according to claim 1, characterized in that, The output display module includes signal indicator lights XD1~XD10, a front panel, a timing display module, red positioning indicator lights XD1, XD4, XD6, and XD8, blue positioning indicator light XD2, green positioning indicator lights XD3, XD9, and XD10, and white positioning indicator light XD5. The signal indicator lights XD1~XD10 are arranged sequentially on the front panel of the detection device. One end of signal indicator light XD1 is connected to pin 12 of connector CZ1 in the connection device and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode. The other end of signal indicator light XD1 is connected to... One end of signal indicator XD2 is connected to pin 16 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode; the other end of signal indicator XD2 is grounded. One end of signal indicator XD3 is connected to pin 15 of connector CZ1 in the connection device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode; the other end of signal indicator XD3 is grounded. One end of signal indicator XD4 is connected to pin 17 of connector CZ1 in the connection device, and is connected to the normally open terminal of relay J4 in the logic control module through a signal isolation diode.

4. The normally open terminals of the second pair of contacts are connected, and the other end of the signal indicator XD4 is grounded; one end of the signal indicator XD5 is connected to pin 5 of connector CZ1 in the connecting device, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of the signal indicator XD5 is grounded; one end of the signal indicator XD6 is connected to the normally open contact of switch 72 in the logic control module, and is connected to the normally open terminal of the second pair of contacts of relay J4 in the logic control module through a signal isolation diode, and the other end of the signal indicator XD6 is grounded; one end of the signal indicator XD7 is connected to the normally open contact of the logic control module through a signal isolation diode. The normally open terminal of the second pair of contacts of relay J4 is connected to pin 1 of connector CZ4 in the connection device, and the other end of indicator light XD7 is grounded; one end of indicator light XD8 is connected to the normally open terminal of the first pair of contacts of relay J7 in the logic control module through a signal isolation diode, and the other end is grounded; one end of indicator light XD9 is connected to the normally open terminal of the third pair of contacts of relay J3 in the logic control module, and the other end is grounded; one end of indicator light XD10 is connected to the positive terminal of the coil of relay J2 in the logic control module through a signal isolation diode, and is connected to the output terminal of time delay relay A1 in the logic control module, and the other end is grounded; The timing display module is also located on the front panel. The positive power supply terminal of the timing display module is connected to fuse No. 5, the negative power supply terminal of the timing display module is grounded, the positive voltage trigger terminal of the timing display module is connected to fuse No. 5, the negative voltage trigger terminal of the timing display module is connected to the common terminal of the third pair of contacts of relay J8 in the logic control module, the positive current trigger terminal of the timing display module is connected to the normally open terminal of the third pair of contacts of relay J6 in the logic control module, and the negative current trigger terminal of the timing display module is connected to the common terminal of the first pair of contacts of relay J6 in the logic control module.

3. The feathering accessory detection device for turboprop aircraft according to claim 2, characterized in that, The connection device includes connectors CZ1 to CZ4. Connecting holes numbered 1 to 22 are provided on connector CZ1. Hole 1 of connector CZ1 connects to fuse #3 in the power module; hole 2 of connector CZ1 connects to the 56° endpoint of the throttle angle switch in the logic control module; hole 3 of connector CZ1 connects to the 30kg terminal of the torque feathering sensor switch in the logic control module; hole 4 of connector CZ1 connects to the 10kg terminal of the torque feathering sensor switch in the logic control module; hole 6 of connector CZ1 connects to the first set of normally open terminals of switch 137 in the logic control module; and hole 7 of connector CZ1 connects to the normally open terminals of some feathering switches in the logic control module. Furthermore, pin 7 of the CZ1 connector is connected to the first and second normally open contacts of switch 137 in the logic control module via diodes; pin 8 of the CZ1 connector is connected to the first normally open contact of switch 134 in the logic control module; pin 9 of the CZ1 connector is connected to the first normally closed contact of relay J2 in the logic control module; pin 10 of the CZ1 connector is connected to the positive terminal of the coil of relay J1 in the logic control module; pin 10 of the CZ1 connector is also connected to the second normally open contact of switch 137 in the logic control module via a diode; pins 11, 18, and 22 of the CZ1 connector are grounded; and pin 13 of the CZ1 connector is connected to the throttle angle in the logic control module. The common terminal of the switch is connected; pin 14 of the CZ1 connector is connected to the second normally open terminal of switch 134 in the logic control module, and the second normally open terminal of switch 134 is connected to the first common terminal; pin 19 of the CZ1 connector is connected to the first pair of normally open contacts of relay J3 in the logic control module, pin 19 of the CZ1 connector is also connected to the second pair of normally open contacts of relay J3 in the logic control module through a diode, pin 19 of the CZ1 connector is connected to the third pair of normally open contacts of relay J7 in the logic control module, pin 19 of the CZ1 connector is also connected to the signal indicator XD4 through a diode; pin 20 of the CZ1 connector is connected to the negative tension / pressure signal device of the logic control module. The normally open terminals are connected; pin 21 of the CZ1 connector is connected to the negative terminal of the coil of relay J9 in the logic control module, and pins 21 and 22 of the CZ1 connector are shorted; the CZ2 connector has connection holes numbered 1 to 4, pin 1 of the CZ2 connector is grounded, pin 2 of the CZ2 connector is connected to the positive terminal of the coil of relay J8 in the logic control module and the normally open terminal of the first pair of contacts of relay J8, pin 2 of the CZ2 connector is connected to the normally open terminal of the self-test switch of the timing mechanism; pin 3 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J6 in the logic control module; pin 4 of the CZ2 connector is connected to the normally closed terminal of the first pair of contacts of relay J5 in the logic control module.The CZ3 connector has connection holes numbered 1 to 2. Hole 1 of the CZ3 connector is connected to the positive terminal of the battery pack in the power module via fuse 6 to charge the battery pack. Hole 2 of the CZ3 connector is grounded. The CZ4 connector also has connection holes numbered 1 to 2, and hole 2 of the CZ4 connector is grounded.

4. The feathering accessory detection device for turboprop aircraft according to claim 3, characterized in that, The logic control module includes: switches 72, 137, and 134; a throttle angle switch; a partial feathering switch; a torque feathering sensor switch; a negative tension pressure signal switch; a tester self-test switch; a timing mechanism self-test switch; time delay relays A1 and A2; relays J1 to J9; and a current-limiting resistor. The 0° terminal of the throttle angle switch is connected to the common terminal of the second pair of contacts of relay J3; the 40° terminal of the throttle angle switch is connected to the common terminal of the first pair of contacts of J3; and the 56°, 82°, and 105° terminals of the throttle angle switch are all connected to the torque feathering sensor. The common terminal of the sensor switch is connected; the normally open terminal of the tester self-test switch is connected to the common terminal of relay J9; the normally closed terminal of relay J9 is connected to pin 2 of connector CZ2 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J1 via a diode; the normally closed terminal of relay J9 is also connected to the positive terminal of the coil of relay J4 via a diode and to the normally open terminal of the first set of contacts; the signal trigger A terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1; the signal trigger B terminal of time delay relay A2 is connected to the common terminal of the second pair of contacts of relay J1. Initial connection: The positive terminal of time delay relay A2 is connected to fuse #5 of the power module; the negative terminal of time delay relay A2 is grounded; the coil D terminal of time delay relay A2 is connected to fuse #1; the coil C terminal of time delay relay A2 is connected to the positive terminal of the coil of relay J7; the coil negative terminal of relay J7 is grounded. The signal trigger A terminal of time delay relay A1 is connected to the common terminal of the first pair of contacts of relay J1; the signal trigger B terminal of time delay relay A1 is connected to the normally open terminal of the first pair of contacts of relay J1; the positive terminal of time delay relay A1 is connected to fuse #5 of the power module. The negative terminal of appliance A1 is grounded. The coil D terminal of time delay relay A1 is connected to fuse No.

1. The coil C terminal of time delay relay A1 is connected to the positive terminal of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the common terminal of the second pair of contacts of relay J2 through a diode. The coil C terminal of time delay relay A1 is also connected to the normally open terminal of the third pair of contacts of relay J4 through a diode. The coil C terminal of time delay relay A1 is also connected to the positive terminal of relay J3 through a diode. The negative terminals of the coils of relays J1, J2, J3, J5, and J6 are grounded. The common terminal of the first pair of contacts of relay J2 is grounded; the normally open terminal of the second pair of contacts of relay J2 is connected to the common terminal of the third pair of contacts of relay J3; the normally open terminal of the third pair of contacts of relay J3 is connected to the indicator light XD9; the negative terminal of the coil of relay J4 is connected to the common terminal of the second pair of contacts of relay J7; the normally open terminal of the second pair of contacts of relay J4 is connected to the indicator lights XD1~XD8 respectively through 8 diodes; the normally open terminal of the fourth pair of contacts of relay J4 is connected to the positive terminal of the coil of relay J5; the normally open terminals of the first and second pairs of contacts of relay J5 are connected; the common terminal of the first pair of contacts of relay J5 is connected to the negative terminal of the coil of relay J8; the common terminal of the second pair of contacts of relay J5 is grounded; the normally open terminal of the third pair of contacts of relay J5 is connected to the positive terminal of the coil of relay J6; the normally open terminal of the first pair of contacts of relay J6 is grounded; the normally open terminal of the second pair of contacts of relay J7 is grounded; and the common terminal of the second pair of contacts of relay J8 is grounded.

5. The detection method of the detection device according to any one of claims 1-4, characterized in that, This includes methods for testing feathering relay boxes using testing devices and methods for testing feathering timing mechanisms using testing devices.

6. The detection method according to claim 5, characterized in that, The testing method for the feathering relay box using a testing device includes: (1) Test method for automatic torque feathering function: set the throttle angle switch to the 56° end, set the automatic torque feathering sensor switch to the 30 Kg end, and supply power from the feathering relay box to the 13th hole of the CZ1 connector to the throttle angle switch. The positive power goes through the 56° end of the throttle angle switch to the 2nd hole of the CZ1 connector to supply power to the feathering relay box. The positive power goes through the 15th hole of the CZ1 connector to the signal indicator XD3. When the signal indicator XD3 lights up, it indicates that the feathering ready function in the feathering relay box is normal. When the torque automatic feathering sensor switch is set to the 10Kg end, positive electricity flows from the 56° end of the throttle angle switch to the common end and the 10Kg end of the torque automatic feathering sensor switch, then to the 4 holes of the CZ1 connector, and finally to the feathering relay box, triggering the feathering circuit inside the feathering relay box. There is a clicking sound from the feather pump contactor inside the feather relay box; The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally. The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal. The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal. The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1. The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends. When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally. After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out, indicating that the automatic feathering torque circuit of the feathering relay box is functioning correctly. (2) Test method for negative thrust feathering function: Set the throttle angle switch to the 40° position and press the negative thrust feathering sensor switch; Positive current flows through the negative thrust feathering sensor switch to the coil of relay J3, activating relay J3. The current flows from the 40° terminal of the throttle angle switch to the common and normally open terminals of the first pair of contacts of relay J3, then through pin 19 of connector CZ1 to the feathering relay box, triggering the negative thrust feathering signal. There is a clicking sound from the feather pump contactor inside the feather relay box; The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally. The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal. The feeder relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal. The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1. The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends. When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally. After time-delay relay A1 is activated, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, activating relays J2 and J3. The positive current flows through the common and normally open terminals of the second pair of contacts of relay J2, to the common and normally open terminals of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop working, all indicator lights go out, indicating that the negative force feathering function circuit is functioning correctly. (3) Partial feathering function test method Pressing the partial feathering button sends positive current from the partial feathering button switch to pin 7 of the CZ1 connector. At this time, you will hear the feathering contactor in the feathering relay box click, and the indicator light XD2 will light up, indicating that the partial feathering function in the feathering relay box is normal. (4) Test method for artificial feathering function When switch 137 is switched to the feathering position, the positive current is split into two paths through the common terminal and the second normally open terminal of switch 137 via diodes. One path goes to pin 7 of connector CZ1. At this time, you will hear the feathering contactor click in the feathering relay box, and the signal indicator XD2 will light up. Another path leads to pin 10 of the CZ1 connector, which then passes through pin 12 of the CZ1 connector to signal indicator XD1, causing XD1 to illuminate. The feathering relay passes through pins 17 and 12 of the CZ1 connector, and the feathering relay box passes through pin 17 of the CZ1 connector to the signal indicator XD4. When the XD4 light is on, it indicates that the relevant circuit for the engine fault signal is normal. The feathering relay box connects to signal indicator XD1 via pin 12 of connector CZ1. When XD1 is lit, it indicates that the circuit related to the parking solenoid valve is normal, which means that the manual feathering function inside the feathering relay box is normal. (5) Test method for automatic feathering torque check function With the throttle angle switch set to 56° and the automatic feathering torque sensor switch set to 30 kg, positive power flows from the feathering relay box to pin 13 of the CZ1 connector to power the throttle angle switch. Positive power then flows through the 56° end of the throttle angle switch to pin 2 of the CZ1 connector to power the feathering relay box. Positive power then flows through the feathering relay box to pin 15 of the CZ1 connector and finally to indicator light XD3. When indicator light XD3 is lit, it indicates that the feathering ready function in the feathering relay box is working properly. With the automatic feathering torque check switch 134 engaged and held, a positive current flows from the second common terminal and normally open terminal of switch 134 to pin 14 of connector CZ1, activating the feathering relay check in the feathering relay box. The feathering relay box supplies power to indicator light XD5 through pin 5 of connector CZ1, causing XD5 to illuminate while XD1 remains off. Another positive current flows from the first normally open terminal and common terminal of switch 134 to the 8 pins of connector CZ1, causing the feathering ready relay in the feathering relay box to remain self-locking. When the torque automatic feathering sensor switch is set to the 10 kg end, positive electricity flows from the 56° end of the throttle angle switch through the common end of the torque automatic feathering sensor switch, the 10 kg end to the 4 holes of the CZ1 connector, and then to the feathering relay box, triggering the feathering circuit inside the feathering relay box. There is a clicking sound from the feather pump contactor inside the feather relay box; The feathering relay box connects to signal indicator XD2 via pin 16 of connector CZ1. When signal indicator XD2 is lit, it indicates that the feathering pump circuit is working normally. The feathering relay box connects to signal indicator XD4 via pin 17 of connector CZ1. When XD4 is lit, it indicates that the relevant circuit for the engine fault signal is normal. The feeder relay box connects to the positive terminal of the relay J1 coil via pin 10 of connector CZ1. After the coil returns to negative, relay J1 operates, shorting terminals A and B of time delay relays A1 and A2, thus activating time delay relays A1 and A2. Terminals A and B of time delay relay A1 are signal trigger terminals. After a 12-second delay following the shorting of terminals A and B, terminals C and D of the coil are engaged. After 3 seconds of engagement, the coils disengage, ending the operation of time delay relay A1. The A and B terminals of the time delay relay A2 are signal trigger terminals; when the A and B terminals are short-circuited, the C and D terminals of the coil are engaged for 12 seconds and then disengaged, and the operation of the time delay relay A2 ends. When time delay relay A2 is activated, relay J7 operates for 12 seconds. Positive current flows through the normally open terminal and common terminal of the third pair of contacts of J7 to signal indicator XD4, causing indicator XD4 to light up, indicating an engine malfunction. Positive current also continuously supplies power to pin 10 of connector CZ1 for 12 seconds. Positive current also flows through the normally open terminal and common terminal of the first pair of contacts of relay J7 to signal indicator XD8, causing XD8 to light up, indicating that the time delay relay is working normally. After time-delay relay A1 operates, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J1, through the coil, and back to negative. Similarly, the positive current at terminals C and D of coil A1 flows from terminal C to the positive terminal of coil J3, through the coil, and back to negative, causing relays J2 and J3 to operate. The positive current flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, to the common terminal and normally open terminal of the third pair of contacts of relay J3, and then to indicator light XD9, causing XD9 to illuminate. XD9 does not illuminate for 12 seconds after indicator light XD8 illuminates. After 12 seconds, indicator light XD9 illuminates for 3 seconds, confirming that the entire feathering operation lasts 15 seconds, consistent with the actual test run. The negative return circuit inside the feathering relay box returns to negative through pins 11 and 18 of connector CZ1. After time-delay relays A1 and A2 stop operating, all indicator lights go out, indicating that the automatic torque feathering check function inside the feathering relay box is normal. (6) Negative tension feathering function test method With the throttle angle switch set to 0°, press the negative pull feathering sensor switch; positive power flows from pin 20 of the CZ1 connector to the feathering relay box, and the feathering relay box supplies power to the indicator light XD4 via pin 17 of the CZ1 connector. The XD4 light illuminates, indicating that the negative pull feathering check function inside the feathering relay box is normal.

7. The detection method according to claim 6, characterized in that, The testing method for the feathering timing mechanism using a testing device is as follows: Connect the detection device to the feathering timing mechanism using the CZ2 connector. Press the timing mechanism self-test button, and positive electricity will flow from the timing mechanism self-test button through the two holes of the CZ2 connector to the timing mechanism as a trigger signal for the timing mechanism to work. Positive current flows through the common terminal and normally closed terminal of the third pair of contacts of relay J6 to the positive and negative terminals of the timing module current trigger. Then, it flows through the common terminal and normally closed terminal of the first pair of contacts of relay J6 to the 3rd pin of connector CZ2. The 3rd pin of connector CZ2 supplies power to the timing mechanism. The timing mechanism returns to negative through the 1st pin of connector CZ2, causing the timing mechanism to work. The current trigger terminal of the timing module detects the current and starts timing and displays the duration. Positive current flows from the coil of relay J8 through the common terminal and normally closed terminal of the first pair of contacts of relay J5 to pin 4 of connector CZ2, powering the micro switch of the timing mechanism. Positive current then flows through the common terminal and normally closed terminal of the first pair of contacts of relay J8 to the coil of relay J8, and then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to pin 4 of connector CZ2. Pin 4 of connector CZ2 powers the feathering timing mechanism. Positive current returns to negative from pin 1 of connector CZ2, causing relay J8 to self-lock. Positive current then flows through the voltage trigger terminal of the timing module to the normally open terminal and common terminal of relay J8, returning to negative. The voltage trigger terminal of the timer starts timing. The timer display module shows "U" duration 12±1 s and "I" duration 15±1 s. If the current is within the range of 0.8A to 1.5A, it indicates that the timing mechanism is working normally.

8. The detection method according to claim 7, characterized in that, Before performing the testing methods for the featherer relay box and the featherer timing mechanism, the testing device is self-tested. The self-test method is as follows: During device self-test, disconnect connectors CZ1 to CZ3, short-circuit pins 21 and 22 of connector CZ1, activate relay J9 in the logic control module, disable the tester's self-test switch function, and prevent the test device from damaging or misjudging the tested feathering relay box and feathering timing mechanism during self-test. When the tester self-test switch is turned on, positive power flows through the busbar, fuse 2, and the tester self-test switch to the common and normally closed terminals of relay J9, dividing into three paths: The first path goes through the diode to relay J1, making J1 work. After J1 works, the signal trigger points A and B of time delay relay A1 are shorted, and the signal trigger points A and B of A2 are shorted, making the two time delay relays start working. After the time-delay relay A2 is activated, the coil terminals C and D are engaged for 12 seconds and then disconnected. Positive current flows from the coil terminal D through terminal C to the relay J7 coil, then returns to negative, and the relay J7 is activated for 12 seconds. The second path goes through the diode to the coil of relay J8, then through the common terminal and normally open terminal of the first pair of contacts of relay J5 to the common terminal and normally open terminal of the second pair of contacts of relay J5, returning to the negative direction, so that relay J8 can work. The third path goes through the diode to the coil of relay J4, and then through the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to the negative direction to make relay J4 work. The J4 relay has a self-locking function. Positive current flows through the common terminal and normally open terminal of the first pair of contacts of J4 to the J4 coil, and then to the common terminal and normally open terminal of the second pair of contacts of relay J7, returning to negative. The self-locking time depends on the working time of relay J7, which is controlled by the time delay relay A2. After relay J4 is activated, positive current flows from the common terminal and normally open terminal of the second pair of contacts of relay J4 to the diode and then to the indicator lights XD1 to XD8, illuminating the eight indicator lights to determine whether the eight indicator lights are working properly. Signal indicator XD10 is the working indicator for time delay relay A1. When A1 is working, positive current flows from terminal D of the coil of A1 to terminal C and then to signal indicator XD10. When signal indicator XD10 is lit, it indicates that the signal light is working normally. After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J2, returning to negative, and relay J2 is activated. After relay J4 is activated, positive current flows through the common terminal and normally open terminal of the third pair of contacts of relay J4 to the coil of relay J3, activating relay J3. Positive current also flows through the common terminal and normally open terminal of the second pair of contacts of relay J2, through the common terminal and normally open terminal of the third pair of contacts of relay J3, to the signal indicator XD9. The illumination of signal indicator XD9 indicates that relays J1-J8 and signal indicator XD9 are working normally. The illumination time of signal indicator XD9 is controlled by time delay relay A2, therefore signal indicator XD9 is used as the working indicator of time delay relay A2. Positive current flows from the common terminal and normally open terminal of the fourth pair of contacts of relay J4 to the coil of relay J5, causing relay J5 to operate; positive current flows from the common terminal and normally open terminal of the third pair of contacts of relay J5 to the coil of relay J6, causing relay J6 to operate. After relay J6 is activated, the positive current flows through the current-limiting resistor to the common terminal and normally open terminal of the second pair of contacts of relay J6, then to the current trigger terminal of the timing module, and finally to the common terminal and normally open terminal of the first pair of contacts of relay J6, returning to the negative, causing the timing module to start timing. The timing duration is controlled by the time delay relay A2. After the time delay relay A1 is activated, the coil terminals C and D are energized for 12 seconds and then disengaged for 3 seconds. Positive current flows from the coil terminal C of the time delay relay A1 to the coils of relays J2 and J3, causing relays J2 and J3 to activate. The indicator light XD9 is off for the first 12 seconds, then illuminates for 3 seconds and then goes out, indicating that the time delay relay A1 is in the working state. The self-test duration is controlled by time delay relays A1 and A2. The self-test process checks the functions of relays J1 to J8, as well as the functions of time delay relays A1 and A2, timing modules, and signal indicator lights.

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