A helicopter rotor heating resistance testing device

Abstract

This utility model relates to a helicopter rotor heating resistance testing device, comprising a first housing, a power supply, a first resistance meter, a second resistance meter, a first rotary gear selector, a second rotary gear selector, a third rotary gear selector, a testing port, and a testing cable. The power supply terminal of the power supply is connected in parallel with the first and second resistance meters. The testing terminals of both the first and second resistance meters are also connected in parallel with the testing port. The first and second rotary gear selectors are connected in parallel on the first resistance meter-test port circuit. A pin selector switch is connected in series on a branch of the second rotary gear selector. The third rotary gear selector is located on the second resistance meter-test port circuit. One end of the testing cable has a testing terminal connector. The power supply terminal of the power supply also has a power switch. This utility model achieves rapid connection to the heating circuit on the helicopter through the testing port and testing cable, thereby significantly improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of resistance value detection technology for heating resistance wires of helicopter rotors, specifically a device for detecting the resistance of heating resistance wires of helicopter rotors. Background Technology

[0002] To ensure safety during flight, helicopters incorporate a heating system within their rotor blades to prevent icing in low-temperature conditions. During routine maintenance and troubleshooting, it's necessary to test the resistance of the heating resistors in the heating circuit. The original method involved using a multimeter to measure the heating resistance between corresponding pins, and a megohmmeter to test the insulation resistance between pin 5 of the basic helicopter rotor blade heating circuit connector and the housing, or the insulation resistance between pins 11 and 12 of the improved helicopter rotor blade heating circuit connector and the housing. Using a megohmmeter required frequently changing the contacts of the two test leads, making the testing process cumbersome and time-consuming. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a helicopter rotor heating resistance detection device to address the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A helicopter rotor heating resistance testing device includes a first housing, a power supply, a first resistance meter, a second resistance meter, a first rotary gear selector, a second rotary gear selector, a third rotary gear selector, a testing port, and a testing cable. The power supply, the first resistance meter, the second resistance meter, the first rotary gear selector, the second rotary gear selector, the third rotary gear selector, and the testing port are all mounted on an operation panel inside the first housing. The power supply terminal of the power supply is connected in parallel with the first resistance meter and the second resistance meter. The testing terminals of the first resistance meter and the second resistance meter are also connected in parallel with the testing port. The first rotary gear selector and the second rotary gear selector are connected in parallel on the first resistance meter-test port circuit. The first rotary gear selector and the second rotary gear selector are respectively used to connect heating resistance wires between different pins in the basic heating circuit and the improved heating circuit to the first resistance meter-test port circuit. A pin selection switch for controlling the testing gear of the second rotary gear selector is connected in series on a branch of the second resistance meter-test port circuit. A third rotary gear selector is provided. This third rotary gear selector is used to connect different grounding pins in the basic heating circuit and the improved heating circuit to the corresponding helicopter rotor leading edge sheathing iron, and to the second resistance meter-detection port circuit to detect the insulation resistance between the different grounding pins and the corresponding helicopter rotor leading edge sheathing iron. One end of the detection cable is provided with a detection end connector for connecting to the detection port. The other end of the detection cable is provided with a basic heating circuit connector and an improved heating circuit connector, both electrically connected to the detection end connector. The basic heating circuit connector and the improved heating circuit connector are used to connect to the basic heating circuit connection port of the basic helicopter rotor or the improved heating circuit connection port of the improved helicopter rotor. The detection port is provided with multiple independent contacts, each electrically connected to the pins of the basic heating circuit and the improved heating circuit. These contacts are electrically connected to the corresponding gear contacts on the first rotary gear selector, the second rotary gear selector, and the third rotary gear selector via the detection cable. The power supply terminal is also equipped with a power switch.

[0006] Furthermore, the basic heating circuit connection port has 7 pins, of which pins 1, 2, 3, and 4 are connected to the heating resistance wire, and pin 5 is the common ground terminal. The first rotary switch 4 includes 1-5, 2-5, 3-5, 4-5 and an insulation position. The 1-5, 2-5, 3-5, and 4-5 positions are respectively used to measure the heating resistance value between pins 1, 2, 3, 4 and pin 5 on the basic heating circuit connection port.

[0007] Furthermore, the improved heating circuit connection port has twelve pins, of which pins 1, 2, 3, 4, 5, and 9 are connected to the heating resistance wire, pin 12 is the common ground terminal of pins 1 and 2, and pin 11 is the common ground terminal of pins 3, 4, 5, and 9. The second rotary gear selector includes 1-12, 2-12, 3-11, 4-11, 5-11, 9-11 positions and an insulation position. Positions 1-12 and 2-12 are used to measure the heating resistance values ​​between pins 1 and 2 and pin 12 on the improved heating circuit connection port, respectively. Positions 3-11, 4-11, 5-11, and 9-11 are used to measure the heating resistance values ​​between pins 3, 4, 5, and 9 and pin 11 on the improved heating circuit connection port, respectively.

[0008] Furthermore, the third rotary gear selector includes 5-shell, 11-shell, and 12-shell positions. The 5-shell position is used to measure the insulation resistance between pin 5 of the basic heating circuit connection port and the leading edge sheath of the basic helicopter rotor. When the third rotary gear selector uses the 5-shell position to measure the resistance value, the first rotary gear selector rotates to the insulation position. The 11-shell and 12-shell positions are used to measure the insulation resistance between pin 11 and pin 12 of the improved heating circuit connection port and the leading edge sheath of the improved helicopter rotor, respectively. When the third rotary gear selector uses the 11-shell and 12-shell positions to measure the resistance value, the second rotary gear selector rotates to the insulation position.

[0009] Furthermore, the pin selection switch includes an 11-pin position and a 12-pin position. When using the second rotary selector, the 11-pin position and the 12-pin position are used to connect the 11-pin or 12-pin pin to the first resistance meter-detection port circuit, respectively.

[0010] Furthermore, the detection cable is stored inside the second housing.

[0011] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0012] This invention enables rapid connection to the heating circuit on a helicopter via a detection port and detection cable, avoiding the tedious process of frequently changing test probe contacts required when using a megohmmeter, thus significantly improving detection efficiency. The device uses a rotary switch to quickly switch between different pin combinations, allowing operators to easily select the resistance or insulation resistance value to be measured without manual adjustment of the test probes, simplifying the operation process. This device is designed with dedicated detection settings for basic and improved helicopter rotor heating circuits, meeting the detection needs of different helicopter models and improving the device's versatility and flexibility.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a circuit connection diagram of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the testing cable.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. First housing; 2. First ohmmeter; 3. Second ohmmeter; 4. First rotary gear selector; 5. Second rotary gear selector; 6. Third rotary gear selector; 7. Detection port; 8. Detection cable; 801. Detection terminal connector; 802. Basic heating circuit connector; 803. Improved heating circuit connector; 9. Pin selector switch; 10. Second housing; 11. Power switch. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1-3As shown, a helicopter rotor heating resistance testing device includes a first housing 1, a power supply, a first resistance meter 2, a second resistance meter 3, a first rotary gear selector 4, a second rotary gear selector 5, a third rotary gear selector 6, a testing port 7, and a testing cable 8. The power supply, the first resistance meter 2, the second resistance meter 3, the first rotary gear selector 4, the second rotary gear selector 5, the third rotary gear selector 6, and the testing port 7 are all installed on the operation panel inside the first housing 1. The power supply terminal of the power supply is connected in parallel with the first resistance meter 2 and the second resistance meter 3. The detection terminals of the second resistance meter 3 are all connected in parallel with the detection port 7. A first rotary speed selector 4 and a second rotary speed selector 5 are connected in parallel on the circuit of the first resistance meter 2-detection port 7. The first rotary speed selector 4 and the second rotary speed selector 5 are respectively used to connect the heating resistance wires between different pins in the basic heating circuit and the improved heating circuit to the circuit of the first resistance meter 2-detection port 7. A pin selection switch 9 for controlling the detection range of the second rotary speed selector 5 is connected in series on the branch of the second rotary speed selector 5. The second resistance meter 3-detection port 7... A third rotary switch 6 is provided on the circuit. This third rotary switch 6 is used to connect different grounding pins and corresponding helicopter rotor leading edge sheaths in the basic and improved heating circuits to the circuit of the second resistance meter 3-detection port 7, detecting the insulation resistance between the different grounding pins and the corresponding helicopter rotor leading edge sheaths. One end of the detection cable 8 is provided with a detection terminal connector 801 for connecting to the detection port 7. The other end of the detection cable 8 is connected in parallel with a basic heating circuit connector 802 and a modified heating circuit connector 802, both electrically connected to the detection terminal connector 801. The improved heating circuit connector 803, along with the basic heating circuit connector 802 and the improved heating circuit connector 803, are used to connect to the basic heating circuit connection port of the basic helicopter rotor or the improved heating circuit connection port of the improved helicopter rotor. The detection port 7 is provided with multiple independent contacts, each for electrical connection to the pins of the basic and improved heating circuits. These contacts are electrically connected to corresponding gear contacts on the first rotary gear selector 4, the second rotary gear selector 5, and the third rotary gear selector 6 via the detection cable 8. The power supply terminal is also equipped with a power switch 11.

[0022] In one implementation, the basic heating circuit connection port is provided with 7 pins, of which pins 1, 2, 3, and 4 are connected to the heating resistance wire, and pin 5 is the common ground terminal. The first rotary switch 4 includes 1-5, 2-5, 3-5, 4-5 and an insulation position. The 1-5, 2-5, 3-5, and 4-5 positions are respectively used to measure the heating resistance value between pins 1, 2, 3, 4 and pin 5 on the basic heating circuit connection port.

[0023] In one implementation, the improved heating circuit connection port has twelve pins, of which pins 1, 2, 3, 4, 5, and 9 are connected to the heating resistance wire, pin 12 is the common ground terminal of pins 1 and 2, and pin 11 is the common ground terminal of pins 3, 4, 5, and 9. The second rotary gear selector 5 includes 1-12, 2-12, 3-11, 4-11, 5-11, 9-11 positions and an insulation position. Positions 1-12 and 2-12 are used to measure the heating resistance values ​​between pins 1 and 2 and pin 12 on the improved heating circuit connection port, respectively. Positions 3-11, 4-11, 5-11, and 9-11 are used to measure the heating resistance values ​​between pins 3, 4, 5, and 9 and pin 11 on the improved heating circuit connection port, respectively.

[0024] In one embodiment, the third rotary gear selector 6 includes 5-shell, 11-shell, and 12-shell positions. The 5-shell position is used to measure the insulation resistance between pin 5 of the basic heating circuit connection port and the leading edge cladding of the basic helicopter rotor. When the third rotary gear selector 6 uses the 5-shell position to measure the resistance value, the first rotary gear selector 4 rotates to the insulation position. The 11-shell and 12-shell positions are used to measure the insulation resistance between pin 11 and pin 12 of the improved heating circuit connection port and the leading edge cladding of the improved helicopter rotor, respectively. When the third rotary gear selector 6 uses the 11-shell and 12-shell positions to measure the resistance value, the second rotary gear selector 5 rotates to the insulation position.

[0025] In one implementation, the pin selection switch 9 includes an 11-pin position and a 12-pin position. When using the second rotary gear selector 5, the 11-pin position and the 12-pin position are used to connect the 11-pin or 12-pin pin to the circuit of the first resistance meter 2-detection port 7, respectively.

[0026] In one embodiment, the detection cable 8 is stored inside the second housing 10.

[0027] In this invention, the first ohmmeter 2 has a range of 0-10Ω and a standard value range of 7.8-8.3Ω, while the second ohmmeter 3 has a range of 0-200KΩ and a standard value range of ≥50KΩ. The power supply is a 5V lithium battery. A Type-C charging port is also provided on the control panel.

[0028] The working process of this utility model is as follows: Turn on the power switch 11. The first resistance meter 2 and the second resistance meter 3 will display "E.EEE" and "EEE.E" respectively, proving that the testing equipment is working normally. Then turn off the power switch 11. Confirm that the power switch 11 is in the off position. Take out the testing cable 8, connect the testing end connector 801 of the testing cable 8 to the testing port 7, and connect the basic heating circuit connector 802 or the improved heating circuit connector 803 to the corresponding helicopter rotor heating circuit connection port.

[0029] Basic heating circuit resistance value detection procedure:

[0030] I. Heating resistance value detection

[0031] Set the first rotary gear selector (knob 4) to positions 1-5; set the remaining knobs to any position.

[0032] Turn on the power switch 11, read the value on the first resistance meter 2, and obtain the resistance value between pin 1 and pin 5 of the basic heating circuit connection port.

[0033] Sequentially set the first rotary gear selector 4 to positions 2-5, 3-5, and 4-5, read the value on the first resistance meter 2, obtain the resistance values ​​between pins 2 and 5, pins 3 and 5, and pins 4 and 5 of the basic heating circuit connection port, and then turn off the power switch 11.

[0034] Check if the resistance value is within the specified range of 7.8 to 8.5 Ω. If the first resistance meter 2 displays E.EEE, it indicates that the circuit resistance value exceeds the range of the first resistance meter 2, and the rotor end circuit resistance value does not meet the quality requirements.

[0035] II. Insulation resistance value testing

[0036] Set the first rotary gear selector 4 to the insulated position; set the third rotary gear selector 6 to the 5-shell position; and set the remaining knobs to any position.

[0037] Turn on the power switch 11, read the value on the second resistance meter 3. If it displays EEE.E, it means that the resistance is outside the detection range of the second resistance meter 3. Otherwise, read the corresponding value to obtain the insulation resistance value between pin 5 of the basic heating circuit connection port and the rotor leading edge iron. Then turn off the power switch 11.

[0038] Check if the resistance value is within the specified range of ≥50KΩ. If the second resistance meter 3 displays EEE.E, it indicates that the rotor insulation resistance is greater than the maximum range of 200KΩ of the second resistance meter 3, which meets the quality requirements.

[0039] Improved heating circuit resistance detection process:

[0040] I. Heating resistance value detection

[0041] Set the pin selection switch 9 to the selection position 12; set the second knob shifter 5 to the 1-12 position; set the remaining knobs to any position.

[0042] Turn on the power switch 11, read the value on the first resistance meter 2, and obtain the resistance value between pin 1 and pin 12 of the improved heating circuit connection port.

[0043] Set the second rotary gear selector 5 to the 2-12 position to obtain the resistance value between pin 2 and pin 12 of the improved heating circuit connection port.

[0044] Set the pin selection switch 9 to the 11 position; set the second rotary switch 5 to the 3-11 position to obtain the resistance value between pin 3 and pin 11 of the improved heating circuit connection port.

[0045] Keep the pin selection switch 9 in position 11, and sequentially turn the second rotary switch 5 to positions 4-11, 5-11, and 9-11 to obtain the resistance values ​​between pins 4 and 11, pins 5 and 11, and pins 9 and 11 of the improved heating circuit connection port.

[0046] Check if the resistance value is within the specified range of 7.8 to 8.5 Ω, and turn off the power switch 11.

[0047] If the first resistance meter 2 displays E.EEE, it means that the circuit resistance value exceeds the range of the first resistance meter 2, and the heating resistance value of the heating circuit does not meet the quality requirements.

[0048] II. Insulation resistance value testing

[0049] Set pin selector switch 9 to select position 11; set the second rotary knob 5 to the insulation position; set the third rotary knob 6 to position 11-shell; set the remaining knobs to any position.

[0050] Turn on the power switch 11 and read the value on the second resistance meter 3. If it displays EEE.E, it means that the resistance is outside the detection range of the second resistance meter 3. Otherwise, read the corresponding value to obtain the insulation resistance value between pin 11 of the improved heating circuit connection port and the rotor leading edge iron.

[0051] Set the pin selection switch 9 to the selection position 12; set the third rotary knob shifter 6 to the 12-shell position;

[0052] Read the value on the second resistance meter 3. If it displays EEE.E, it means that the resistance is outside the detection range of the second resistance meter. Otherwise, read the corresponding value to obtain the insulation resistance between pin 12 of the improved heating circuit connection port and the rotor leading edge iron. Then turn off the power switch 11.

[0053] Check if the resistance value is within the specified range of ≥50KΩ. If the second resistance meter 3 displays EEE.E, it means that the rotor insulation resistance is greater than the maximum range of 200KΩ of the second resistance meter 3, which meets the quality requirements.

[0054] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A helicopter rotor heating resistance testing device, characterized in that, The system includes a first housing (1), a power supply, a first resistance meter (2), a second resistance meter (3), a first rotary gear selector (4), a second rotary gear selector (5), a third rotary gear selector (6), a detection port (7), and a detection cable (8). The power supply, the first resistance meter (2), the second resistance meter (3), the first rotary gear selector (4), the second rotary gear selector (5), the third rotary gear selector (6), and the detection port (7) are all installed on the operation panel inside the first housing (1). The power supply terminal of the power supply is connected in parallel with the first resistance meter (2) and the second resistance meter (3). The first resistance meter (2) and the second resistance meter (3)... The detection terminals are also connected in parallel with the detection port (7). A first rotary shifter (4) and a second rotary shifter (5) are connected in parallel on the circuit of the first resistance meter (2) - detection port (7). The first rotary shifter (4) and the second rotary shifter (5) are respectively used to connect the heating resistance wires between different pins in the basic heating circuit and the improved heating circuit to the circuit of the first resistance meter (2) - detection port (7). A pin selection switch (9) for controlling the detection gear of the second rotary shifter (5) is connected in series on the branch of the second rotary shifter (5). The circuit of the second resistance meter (3) - detection port (7) is equipped with There is a third rotary gear selector (6), which is used to connect different grounding pins and corresponding helicopter rotor leading edge sheaths in the basic heating circuit and the improved heating circuit to the second resistance meter (3) - detection port (7) circuit to detect the insulation resistance between different grounding pins and corresponding helicopter rotor leading edge sheaths. One end of the detection cable (8) is provided with a detection end connector (801) for connecting to the detection port (7), and the other end of the detection cable (8) is provided with a basic heating circuit connector (802) and an improved heating circuit connector (803) that are both electrically connected to the detection end connector (801). 03), the basic heating circuit connector (802) and the improved heating circuit connector (803) are used to connect to the basic heating circuit connection port of the basic helicopter rotor or the improved heating circuit connection port of the improved helicopter rotor. The detection port (7) is provided with multiple independent contacts that are electrically connected to the pins of the basic heating circuit and the improved heating circuit respectively. The multiple contacts are electrically connected to the corresponding gear contacts on the first rotary gear selector (4), the second rotary gear selector (5) and the third rotary gear selector (6) respectively through the detection cable (8). The power supply end of the power supply is also provided with a power switch (11).

2. The helicopter rotor heating resistance testing device according to claim 1, characterized in that, The basic heating circuit connection port has 7 pins, of which pins 1, 2, 3, and 4 are connected to the heating resistance wire, and pin 5 is the common ground terminal. The first rotary switch (4) includes 1-5, 2-5, 3-5, 4-5 and insulation positions. The 1-5, 2-5, 3-5 and 4-5 positions are used to measure the heating resistance value between pins 1, 2, 3, 4 and pin 5 on the basic heating circuit connection port.

3. The helicopter rotor heating resistance testing device according to claim 1, characterized in that, The improved heating circuit connection port has twelve pins, of which pins 1, 2, 3, 4, 5, and 9 are connected to the heating resistance wire, pin 12 is the common grounding terminal of pins 1 and 2, and pin 11 is the common grounding terminal of pins 3, 4, 5, and 9. The second rotary gear selector (5) includes 1-12, 2-12, 3-11, 4-11, 5-11, 9-11 positions and an insulation position. Positions 1-12 and 2-12 are used to measure the heating resistance values ​​between pins 1 and 2 and pin 12 on the improved heating circuit connection port, respectively. Positions 3-11, 4-11, 5-11, and 9-11 are used to measure the heating resistance values ​​between pins 3, 4, 5, and 9 and pin 11 on the improved heating circuit connection port, respectively.

4. A helicopter rotor heating resistance testing device according to claim 2 or 3, characterized in that, The third rotary gear selector (6) includes 5-shell, 11-shell and 12-shell positions. The 5-shell position is used to measure the insulation resistance between pin 5 of the basic heating circuit connection port and the leading edge iron of the basic helicopter rotor. When the third rotary gear selector (6) uses the 5-shell position to measure the resistance value, the first rotary gear selector (4) is rotated to the insulation position. The 11-shell and 12-shell positions are used to measure the insulation resistance between pin 11 and pin 12 of the improved heating circuit connection port and the leading edge iron of the improved helicopter rotor, respectively. When the third rotary gear selector (6) uses the 11-shell and 12-shell positions to measure the resistance value, the second rotary gear selector (5) is rotated to the insulation position.

5. The helicopter rotor heating resistance testing device according to claim 1, characterized in that, The pin selection switch (9) includes an 11-pin position and a 12-pin position. When using the second rotary gear selector (5), the 11-pin position and the 12-pin position are used to connect the 11-pin or 12-pin to the circuit of the first resistance meter (2) - detection port (7).

6. The helicopter rotor heating resistance testing device according to claim 1, characterized in that, The detection cable (8) is stored inside the second housing (10).

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