A balanced medicine box for agricultural aircraft
By designing the split medicine box and control circuit that dynamically adjusts the flow of medicine liquid, the flight instability caused by changes in the center of gravity of small agricultural aircraft is solved, and the handling and stability are improved, ensuring flight safety.
Patent Information
- Application Number
- CN201910946305.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-04
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2039-10-04
AI Technical Summary
Small agricultural spray aircraft have low flight altitude, large airflow changes and severe bumps, which leads to extremely unstable aircraft. Changes in spraying drugs and oil weights destroy the balance of the aircraft and affect handling and stability.
Design a balanced medicine box consisting of three split medicine boxes, dynamically adjust the outflow position of the medicine fluid through a three-position six-way solenoid valve and control circuit to realize dynamic adjustment of the center of gravity of the aircraft, and use the pilot's control button to control the solenoid and relay. Automatically or manually control the outflow of the drug liquid to ensure that the aircraft remains stable under different flight attitudes.
By dynamically adjusting the center of gravity of the aircraft, the maneuverability and stability of the aircraft are improved, flight safety is ensured, and flight instability problems caused by changes in the center of gravity are avoided.
Smart Images
Figure CN110476942B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of agricultural aircraft, in particular to a balancing medicine box for agricultural aircraft. Background Art
[0002] In addition to having enough lift to balance gravity, enough thrust to overcome forward resistance, and good flight performance, an airplane must also have good stability and maneuverability to fly in the air. The factor that has the greatest and most direct impact on flight maneuverability and stability is the center of gravity.
[0003] Generally, the center of gravity of an aircraft is in front of the point where lift is applied. The fore-and-aft limit range of a transport aircraft, that is, the allowable center of gravity variation range, is approximately 20% MAC (mean aerodynamic chord length).
[0004] During normal flight, the center of gravity of the entire aircraft is generally maintained near the middle of the front and rear center of gravity limits. The impact of changes in the center of gravity within the allowable range on the aircraft's attitude and handling characteristics will be eliminated by the pilot through methods such as adjusting the elevator.
[0005] Small agricultural spraying aircraft, however, are extremely unstable in flight due to their low flying altitude, large airflow changes, severe turbulence, and the weight of sprayed drugs and fuel changes at any time, which can destroy the balance of the aircraft at any time. Therefore, it is required that the center of gravity of the carried objects can be changed to adapt to the dynamic balance of the aircraft in flight. Summary of the invention
[0006] The purpose of the present invention is to solve the above existing problems and provide a balanced medicine box for agricultural aircraft.
[0007] The above purpose is achieved by the following technical scheme: a balanced medicine box for agricultural aircraft, which is composed of three split medicine boxes and is placed near the center of gravity of the aircraft. A ventilation cover is set at the highest point of each split medicine box, and a liquid outlet is set at the lowest point of the split medicine box. The three liquid outlets are respectively connected to the three inlets of a three-position six-way solenoid valve through infusion tubes, and the three-position six-way solenoid valve is controlled by a control circuit. The three outlets of the three-position six-way solenoid valve are connected to the three inlets of a collector. An electric valve is set at the outlet of the collector, and the electric valve is connected to the medicine outlet.
[0008] The medicine boxes can be combined together or placed separately at the front, middle and tail of the agricultural aircraft.
[0009] The three-position six-way solenoid valve includes a valve body, a valve core and an electromagnet. The valve core slides left and right in the valve body under the action of the electromagnet and has three positions in the valve body: left, middle and right. Each position has only one inlet and one outlet connected. The electromagnet is controlled by a control circuit. The control button SB1 and the control button SB2 are set on the control rudder of the agricultural aircraft and are manually controlled by the driver.
[0010] The control circuit includes a power supply, an electromagnet, a relay KM1, a relay KM2, a control button SB1, and a control button SB2. The control button SB1 and the normally closed contacts of the relay KM2 are connected in series with the coil of the relay KM1, and the control button SB2 and the normally closed contacts of the relay KM1 and the coil of the relay KM2 are connected in series. The series circuit of the control button SB1, the normally closed contacts of the relay KM2 and the coil of the relay KM1 is connected in parallel with the series circuit of the control button SB2, the normally closed contacts of the relay KM1 and the coil of the relay KM2 and then connected to the positive and negative ends of the power supply; the power supply is electrically connected to the electromagnet on the left side of the three-position six-way solenoid valve 2 through the normally open contact of the relay KM1, the power supply is electrically connected to the electromagnet on the right side of the three-position six-way solenoid valve through the normally open contact of the relay KM2, and the normally closed contact of the relay KM1 and the normally closed contact of the relay KM2 constitute an interlocking circuit.
[0011] The control method of the balanced medicine box of the agricultural aircraft is as follows: the pilot controls the outflow of the medicine liquid of the three separate medicine boxes by operating the control button SB1 and the control button SB2 arranged on the control rudder. When the aircraft is tilted up, the pilot presses the control button SB1, the relay KM1 is energized, the normally open contact KM1 of the relay KM1 is closed, and the electromagnet on the left side of the three-position six-way solenoid valve 2 is energized, so that the medicine liquid in the separate medicine box 3 placed at the tail of the agricultural aircraft flows out; when the aircraft is tilted down, the pilot presses the control button SB2, the relay KM2 is energized, the normally open contact KM2 of the relay KM2 is closed, and the electromagnet (203) on the right side of the three-position six-way solenoid valve 2 is energized, so that the medicine liquid in the separate medicine box 1 102 placed at the front of the agricultural aircraft flows out; when the aircraft is flying normally, the medicine liquid in the separate medicine box 2 103 placed in the middle of the agricultural aircraft flows out.
[0012] The beneficial effects are: dynamically adjusting the center of gravity of the aircraft, improving the maneuverability and stability of the aircraft, and ensuring flight safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the connection between the agricultural aircraft and the balanced medicine box;
[0014] Figure 2 It is a schematic diagram of a split balanced medicine box;
[0015] Figure 3 It is the solenoid valve control circuit diagram;
[0016] Figure 4 This is a schematic diagram of a three-position six-way solenoid valve;
[0017] Figure 5 This is a schematic diagram of the valve core of a three-position six-way solenoid valve.
[0018] As can be seen from the figure: medicine box 1, ventilation cover 101, separate medicine box one 102, separate medicine box two 103, separate medicine box three 104, infusion tube 105, three-position six-way solenoid valve 2, valve body 201, valve core 202, electromagnet 203, collector 3, electric valve 4, medicine liquid outlet 5. DETAILED DESCRIPTION
[0019] The general concept of the present invention is to achieve dynamic balance of agricultural aircraft by changing the center of gravity of the aircraft. Because the center of gravity of the aircraft is too far forward, it may not be able to pull up normally, and the force applied to the horizontal tail is greater, and it is impossible to maintain a normal attitude cruise; if the center of gravity of the aircraft is too far back, it may cause the aircraft to have a tendency to lift up before accelerating to the take-off speed (risk of tail strike). Several embodiments are introduced below in conjunction with the accompanying drawings.
[0020] The first embodiment, as Figure 1 As shown, a balanced medicine box for agricultural aircraft is characterized in that the medicine box 1 is composed of three separate medicine boxes, which are placed near the center of gravity of the aircraft, a ventilation cover 101 is set at the highest point of each separate medicine box, and a liquid outlet is set at the lowest point of the separate medicine box, and the three liquid outlets are respectively connected to the three inlets of the three-position six-way solenoid valve 2 through the infusion tube 105, and the three-position six-way solenoid valve 2 is controlled by the control circuit, the three outlets of the three-position six-way solenoid valve 2 are connected to the three inlets of the collector 3, and an electric valve 4 is set at the outlet of the collector 3, and the electric valve 4 is connected to the liquid medicine outlet 5.
[0021] The second embodiment, as Figure 2 As shown, based on the first embodiment, the medicine boxes 1 can be combined together or placed separately at the front, middle and tail of the agricultural aircraft.
[0022] The third embodiment, as Figure 4 , 5 As shown, on the basis of the above embodiment, the three-position six-way solenoid valve 2 includes a valve body 201, a valve core 201 and an electromagnet 203. The valve core 201 slides left and right in the valve body 201 under the action of the electromagnet 203, and has three positions of left, middle and right in the valve body 201, and each position has only one inlet and one outlet connected; the electromagnet 203 is controlled by a control circuit, and the control button SB1 and the control button SB2 are set on the control rudder of the agricultural aircraft and are manually controlled by the driver.
[0023] The fourth embodiment, as Figure 3As shown, based on the third embodiment, the control circuit comprises a power supply, an electromagnet (203), a relay KM1, a relay KM2, a control button SB1, and a control button SB2; the control button SB1, the normally closed contact of the relay KM2 and the coil of the relay KM1 are connected in series; the control button SB2, the normally closed contact of the relay KM1 and the coil of the relay KM2 are connected in series; the series circuit of the control button SB1, the normally closed contact of the relay KM2 and the coil of the relay KM1 and the series circuit of the control button SB2, the normally closed contact of the relay KM1 and the coil of the relay KM2 are connected in parallel and then connected to the positive and negative ends of the power supply; the power supply is electrically connected to the electromagnet (203) on the left side of the three-position six-way solenoid valve 2 through the normally open contact of the relay KM1; the power supply is electrically connected to the electromagnet (203) on the right side of the three-position six-way solenoid valve 2 through the normally open contact of the relay KM2; the normally closed contact of the relay KM1 and the normally closed contact of the relay KM2 form an interlocking circuit.
[0024] There are multiple control circuits as above. Pressure sensors are respectively arranged under the medicine box 1 102 and the medicine box 3 104 placed at the front and rear of the agricultural aircraft. The three-position six-way solenoid valve 2 is controlled by a voltage comparator and a signal amplifier to automatically select and control the outflow of the medicine liquid from the medicine box.
[0025] In the fifth embodiment, the control method of the balanced medicine box of the agricultural aircraft is as follows: the pilot controls the outflow of the medicine liquid of the three separate medicine boxes by operating the control button SB1 and the control button SB2 set on the control rudder. When the aircraft is tilted up, the pilot presses the control button SB1, the relay KM1 is energized, the normally open contact KM1 of the relay KM1 is closed, and the electromagnet 203 on the left side of the three-position six-way solenoid valve 2 is energized, so that the medicine liquid in the divided medicine box 3 104 placed at the tail of the agricultural aircraft flows out; when the aircraft is lowered, the pilot presses the control button SB2, the relay KM2 is energized, the normally open contact KM2 of the relay KM2 is closed, and the electromagnet 203 on the right side of the three-position six-way solenoid valve 2 is energized, so that the medicine liquid in the divided medicine box 1 102 placed at the front of the agricultural aircraft flows out; when the aircraft is flying normally, the medicine liquid in the divided medicine box 2 103 placed in the middle of the agricultural aircraft flows out.
Claims
1. A balancing medicine box for agricultural aircraft, characterized in that: The medicine box (1) is composed of three separate medicine boxes, each of which is provided with a ventilation cover (101) at the highest point, and a liquid outlet at the lowest point. The three liquid outlets are respectively connected to three inlets of a three-position six-way solenoid valve (2) through infusion tubes (105), and the three-position six-way solenoid valve (2) is controlled by a control circuit. The three outlets of the three-position six-way solenoid valve (2) are connected to three inlets of a collector (3). An electric valve (4) is provided at the outlet of the collector (3), and the electric valve (4) is connected to the medicine liquid outlet (5); The split medicine boxes are respectively placed at the front, middle and tail of the agricultural aircraft; The three-position six-way solenoid valve (2) comprises a valve body (201), a valve core (202) and an electromagnet (203); the valve core (202) slides left and right in the valve body (201) under the action of the electromagnet (203) and has three positions in the valve body (201): left, middle and right; each position has only one inlet and one outlet connected; the electromagnet (203) is controlled by a control circuit; a control button SB1 and a control button SB2 are arranged on the control rudder of the agricultural aircraft and are manually controlled by the pilot; The control circuit comprises a power supply, an electromagnet (203), a relay KM1, a relay KM2, a control button SB1, and a control button SB2; the control button SB1, the normally closed contact of the relay KM2, and the coil of the relay KM1 are connected in series; the control button SB2, the normally closed contact of the relay KM1, and the coil of the relay KM2 are connected in series; the series circuit of the control button SB1, the normally closed contact of the relay KM2, and the coil of the relay KM1 is connected in parallel with the series circuit of the control button SB2, the normally closed contact of the relay KM1, and the coil of the relay KM2, and then connected to the positive and negative terminals of the power supply; the power supply is electrically connected to the electromagnet (203) on the left side of the three-position six-way solenoid valve (2) through the normally open contact of the relay KM1; the power supply is electrically connected to the electromagnet (203) on the right side of the three-position six-way solenoid valve (2) through the normally open contact of the relay KM2; the normally closed contact of the relay KM1 and the normally closed contact of the relay KM2 form an interlocking circuit; The control method of the agricultural aircraft balanced medicine box includes: The driver controls the outflow of liquid medicine from the three separate medicine boxes by operating the control buttons SB1 and SB2 set on the control rudder; When the aircraft tilts its head up, the pilot presses the control button SB1, the relay KM1 is energized, the normally open contact KM1 of the relay KM1 is closed, and the electromagnet (203) on the left side of the three-position six-way solenoid valve (2) is energized, causing the liquid medicine in the split medicine box three (104) placed at the tail of the agricultural aircraft to flow out; When the aircraft lowers its head, the pilot presses the control button SB2, the relay KM2 is energized, the normally open contact KM2 of the relay KM2 is closed, and the electromagnet (203) on the right side of the three-position six-way solenoid valve (2) is energized, causing the liquid medicine in the split medicine box (102) placed at the front of the agricultural aircraft to flow out; When the aircraft is flying normally, the liquid medicine in the split medicine box 2 (103) placed in the middle of the agricultural aircraft flows out.