A retractable water-drawing structure for seaplanes under high-speed and heavy-load conditions

Abstract

The present application provides a retractable water-drawing structure for a seaplane under high-speed and high-load conditions, belonging to the technical field of design of water fire-fighting aircraft mission systems. The structure comprises a water-drawing bucket shell, a bucket body, a hydraulic actuator, a rotating shaft and a rocker arm, wherein the rotating shaft is connected to the water-drawing bucket shell through a bearing; the bucket body, the rocker arm and the rotating shaft are fixedly connected; one end of the hydraulic actuator is hingedly connected to the bearing of the rocker arm, and the hydraulic actuator drives the rotating shaft and the bucket body to rotate by driving the rocker arm to retract or lower the bucket body. The structure is simple, light in weight, reliable in function and highly safe, and meets the requirements of airworthiness clauses.

Description

Technical Field

[0001] The present application belongs to the technical field of design of water fire-fighting aircraft mission systems, and in particular relates to a retractable water-drawing structure of a seaplane under high-speed and high-load conditions. Background Art

[0002] Seaplanes can take off and land on the water surface and are used for firefighting. They have the characteristics of high speed and high firefighting efficiency. They can draw water by high-speed gliding in the waters near the fire area and quickly fly to the fire area to perform water-dropping and firefighting tasks. They are highly maneuverable and flexible and are currently widely used. In order to achieve the water-drawing of aircraft gliding on the water, a device is needed that can quickly guide water into the aircraft. When the aircraft is flying in the air or gliding on the water, it can be folded up without affecting the performance of the aircraft; when performing the water-drawing task, it can be put down to achieve rapid water-drawing when the aircraft is gliding at high speed; when encountering overspeed water-drawing or collision with floating objects, the water-drawing bucket load is overloaded, and it can be automatically folded up to reduce the impact on the aircraft's gliding posture on the water.

[0003] There are few domestic seaplanes used for firefighting. Their water-drawing devices are retractable and retractable, with heavy structures, simple functions, and low safety, making it difficult to meet the requirements of airworthiness clauses. Summary of the invention

[0004] In order to solve the problem that the water-drawing device in the related art has a heavy structure, simple functions, low safety, and is difficult to meet the requirements of airworthiness clauses, the present invention provides a retractable water-drawing structure for seaplanes under high speed and heavy load conditions, and the technical solution is as follows:

[0005] A retractable water-drawing structure for a seaplane under high-speed and heavy-load conditions comprises: a water-drawing bucket shell 1, a bucket body 2, a hydraulic actuator 3, a rotating shaft 4 and a rocker arm 5.

[0006] Among them, the rotating shaft 4 is connected to the water-drawing bucket shell 1 through a bearing; the bucket body 2 is fixed on the rotating shaft 4, and the bucket body 2 can rotate with the rotating shaft 4, and the rocker arm 5 is fixed at the end of the rotating shaft 4; one end of the hydraulic actuator 3 is hingedly connected to the rocker arm 5 bearing, and the hydraulic actuator 3 drives the rotating shaft 4 and the bucket body 2 to rotate by driving the rocker arm 5 to make the bucket body 2 folded or lowered.

[0007] Optionally, the water drawing bucket housing 1 is provided with a first compartment capable of accommodating the bucket body 2, and a second compartment capable of accommodating the rocker arm 5, and the first compartment and the second compartment are isolated.

[0008] Optionally, the rotating shaft 4 is connected to the water bucket housing 1 through a first bearing 41 and a second bearing 42 .

[0009] Optionally, the first bearing 41 is limited and sealed by a first blocking cover 44 , and the second bearing 42 is limited and sealed by a second blocking cover 45 .

[0010] Optionally, the ear piece of the bucket body 2 is connected to the rotating shaft 4 through a polygonal sleeve.

[0011] Optionally, the cross section of the bucket body 2 is sector-shaped, and the center of the cross section of the rotating shaft 4 coincides with the center of the arc of the cross section of the bucket body 2 .

[0012] Optionally, the other end of the hydraulic actuator 3 is connected to a supporting joint on the aircraft.

[0013] Optionally, the hopper housing 1 is located at the rear of the seaplane bottom step, and is connected to the bottom wall plate 11 in front of the step and the bottom wall plate 12 behind the step through fixing parts.

[0014] Optionally, when flying in the air, the hydraulic actuator 3 is retracted and locked under the action of hydraulic pressure, driving the rocker arm 5 to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is retracted and enters the first compartment of the water-drawing bucket shell 1; when performing a water-drawing task, the hydraulic actuator 3 is extended under the action of hydraulic pressure, driving the rocker arm 5 to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is lowered to draw water, and after completing the water drawing, the hydraulic actuator 3 drives the rocker arm 5 to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is retracted and enters the first compartment.

[0015] Optionally, during the water drawing process, when the bucket body 2 collides with floating objects on the water surface or other unexpected conditions occur, the bucket body 2 generates an additional torsional load on the rotating shaft 4, which is transmitted to the hydraulic actuator 3 through the rocker arm 5 fixed on the rotating shaft 4. When the load exceeds the maximum output force of the hydraulic actuator 3, the hydraulic actuator 3 is reversely retracted under the action of the external load. When the hydraulic actuator 3 reaches the retracted position, the rocker arm 5 is driven to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is retracted and enters the first cabin.

[0016] The present invention provides a retractable water-drawing structure for a seaplane under high-speed and heavy-load conditions. The structure comprises a water-drawing bucket shell, a bucket body, a hydraulic actuator, a rotating shaft and a rocker arm. The rotating shaft is connected to the water-drawing bucket shell through a bearing; the bucket body and the rocker arm are fixedly connected to the rotating shaft; one end of the hydraulic actuator is hingedly connected to the bearing of the rocker arm, and the hydraulic actuator drives the rotating shaft and the bucket body to rotate by driving the rocker arm to retract or lower the bucket body. The structure is simple, light, reliable, and highly safe, and meets the requirements of airworthiness clauses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a retractable water-drawing structure of a seaplane provided in an embodiment of the present application in a retracted state under high speed and heavy load conditions;

[0018] Figure 2 A schematic diagram of the interior of a retractable water-drawing structure of a seaplane under high-speed and heavy-load conditions provided in an embodiment of the present application;

[0019] Figure 3A schematic diagram of a retractable water-drawing structure of a seaplane provided in an embodiment of the present application in a lowered state under high speed and heavy load conditions;

[0020] Figure 4 A schematic diagram of the installation of a retractable water-drawing structure of a seaplane under high-speed and heavy-load conditions provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of two compartments of a water hopper housing provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of the connection between the rotating shaft and the water bucket housing provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of the connection between the rotating shaft and the bucket body provided in an embodiment of the present application;

[0024] Figure 8 This is a schematic diagram of the coincidence of the rotating shaft and the center of the bucket provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The present application is further described in detail below through specific implementation methods and drawings.

[0026] The present invention provides a retractable water-drawing structure for a seaplane under high-speed and heavy-load conditions, such as Figure 1 and Figure 2 As shown, the structure is fixed to the bottom of the seaplane, and includes a water scoop housing 1, a scoop body 2, a hydraulic actuator 3, a rotating shaft 4 and a rocker arm 5.

[0027] The rotating shaft 4 is connected to the water-drawing bucket shell 1 through a bearing; the bucket body 2 and the rocker arm 5 are fixedly connected to the rotating shaft 4; one end of the hydraulic actuator 3 is hinged to the rocker arm 5 bearing, and the hydraulic actuator 3 drives the rotating shaft 4 and the bucket body 2 to rotate by driving the rocker arm 5 to make the bucket body 2 fold up or down.

[0028] The water scoop housing 1 can be fixed to the rear of the bottom step of the seaplane, and can be connected to the bottom wall plate 11 in front of the step and the bottom wall plate 12 behind the step by fixing members such as bolts, such as Figure 4 shown.

[0029] like Figure 5 As shown, the water hopper housing 1 is provided with two compartments, compartment 1 (also called the first compartment) is used to store the bucket body 2, and compartment 2 (also called the second compartment) is used to store the rocker arm 5, and compartment 1 and compartment 2 are isolated. When the bucket body 2 is folded, the interior of the water hopper housing 1 can be fully entered.

[0030] The rotating shaft 4 is arranged on the water-drawing bucket shell 1, and the rotating shaft 4 is connected to the water-drawing bucket shell 1 through two bearings; the rotating shaft 4 can rotate around the two bearings.

[0031] Specifically, Figure 6 As shown, the rotating shaft 4 is connected to the water bucket housing 1 through a first bearing 41 and a second bearing 42 . The first bearing 41 is limited and sealed by a first blocking cover 44 , and the second bearing 42 is limited and sealed by a second blocking cover 45 .

[0032] The bucket body 2 is fixed on the rotating shaft 4, and the bucket body 2 can rotate with the rotating shaft 4. Specifically, the ear piece of the bucket body 2 is connected to the rotating shaft 4 through a polygonal sleeve, which plays a role in limiting and transmitting the large load of water pumping. The rotating shaft 4 limits the position of the bucket body 2 in the length direction of the rotating shaft 4 through its own boss and bushing 43, such as Figure 6 shown.

[0033] like Figure 7 and Figure 8 As shown, the cross section of the bucket body 2 is fan-shaped, and the center of the cross section of the rotating shaft 4 coincides with the center of the arc of the cross section of the bucket body 2. When the water pressure is theoretically uniformly distributed, the direction of the resultant force of the water pressure passes through the center of the rotating shaft 4, which can reduce the torque generated by the water pressure load acting on the rotating shaft 4.

[0034] The rocker arm 5 is fixed to the end of the rotating shaft 4. One end of the hydraulic actuator 3 is connected to the bearing hinge of the rocker arm 5, and the other end is connected to the support joint on the aircraft.

[0035] The present invention provides a retractable water-drawing structure for a seaplane under high speed and heavy load conditions. The working principle is as follows: when flying in the air, a hydraulic actuator 3 is retracted and locked under the action of hydraulic pressure, driving a rocker arm 5, driving a rotating shaft 4 and a bucket body 2 to rotate, so that the bucket body 2 is retracted and enters a cabin 1 of a water-drawing bucket shell 1, as shown in FIG. Figure 1 As shown, the bucket body 2 is in the retracted state; when performing the water-drawing task, the hydraulic actuator 3 is extended under the action of the hydraulic pressure, driving the rocker arm 5, driving the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is lowered, as shown in FIG. Figure 3 As shown, water is drawn. After the water is drawn, the hydraulic actuator 3 drives the rocker arm 5 to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is retracted and enters the first cabin; during the water drawing process, when the bucket body 2 collides with floating objects on the water surface or other unexpected conditions occur, the bucket body 2 generates an additional torsional load on the rotating shaft 4, and transmits it to the hydraulic actuator 3 through the rocker arm 5 fixed on the rotating shaft 4. When the load exceeds the maximum output force of the hydraulic actuator 3, the hydraulic actuator 3 is reversely retracted under the action of the external load, and the hydraulic actuator 3 reaches the retracted position, driving the rocker arm 5 to drive the rotating shaft 4 and the bucket body 2 to rotate, so that the bucket body 2 is retracted and enters the cabin 1 of the water drawing bucket shell 1, and the bucket body 2 is in a retracted state.

[0036] The present invention provides a retractable water-drawing structure for a seaplane under high-speed and heavy-load conditions. The structure comprises a water-drawing bucket shell, a bucket body, a hydraulic actuator, a rotating shaft and a rocker arm. The rotating shaft is connected to the water-drawing bucket shell through a bearing; the bucket body and the rocker arm are fixedly connected to the rotating shaft; one end of the hydraulic actuator is hingedly connected to the bearing of the rocker arm, and the hydraulic actuator drives the rotating shaft and the bucket body to rotate by driving the rocker arm to retract or lower the bucket body. The structure is simple, light, reliable, and highly safe, and meets the requirements of airworthiness clauses.

[0037] The above only expresses the implementation methods of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A retractable water-drawing structure for a seaplane under high-speed and heavy-load conditions, characterized in that: include: A water pump housing (1), a bucket body (2), a hydraulic actuator (3), a rotating shaft (4) and a rocker arm (5), The rotating shaft (4) is connected to the water-drawing bucket shell (1) through a bearing; the bucket body (2) is fixed on the rotating shaft (4), and the bucket body (2) can rotate along with the rotating shaft (4); the rocker arm (5) is fixed to the end of the rotating shaft (4); one end of the hydraulic actuator (3) is hingedly connected to the bearing of the rocker arm (5), and the hydraulic actuator (3) drives the rotating shaft (4) and the bucket body (2) to rotate by driving the rocker arm (5) so that the bucket body (2) is folded up or lowered; The ear piece of the bucket body (2) is connected to the rotating shaft (4) through a polygonal sleeve; the rotating shaft (4) limits the position of the bucket body (2) in the length direction of the rotating shaft (4) through its own boss and bushing (43); The cross section of the bucket body (2) is fan-shaped, and the center of the cross section of the rotating shaft (4) coincides with the center of the arc of the cross section of the bucket body (2); The water-drawing bucket shell (1) is provided with a first chamber capable of accommodating the bucket body (2) and a second chamber capable of accommodating the rocker arm (5), and the first chamber and the second chamber are isolated from each other; The rotating shaft (4) is connected to the water bucket housing (1) via a first bearing (41) and a second bearing (42); The first bearing (41) is limited in position and sealed by a first blocking cover (44), and the second bearing (42) is limited in position and sealed by a second blocking cover (45); The water scoop housing (1) is located at the rear of the seaplane bottom step and is connected to the bottom wall plate (11) in front of the step and the bottom wall plate (12) behind the step respectively through fixing parts; When flying in the air, the hydraulic actuator (3) is moved to the retracted position and locked under the action of hydraulic pressure, driving the rocker arm (5) to drive the rotating shaft (4) and the bucket body (2) to rotate, so that the bucket body (2) is retracted and enters the first compartment of the water-drawing bucket shell (1); when performing a water-drawing task, the hydraulic actuator (3) is moved to the extended position under the action of hydraulic pressure, driving the rocker arm (5) to drive the rotating shaft (4) and the bucket body (2) to rotate, so that the bucket body (2) is lowered to draw water, and after the water-drawing is completed, the hydraulic actuator (3) drives the rocker arm (5) to drive the rotating shaft (4) and the bucket body (2) to rotate, so that the bucket body (2) is retracted and enters the first compartment; During the water-drawing process, when the bucket body (2) collides with floating objects on the water surface or other unexpected conditions occur, the bucket body (2) generates an additional torsional load on the rotating shaft (4), which is transmitted to the hydraulic actuator (3) through the rocker arm (5) fixed on the rotating shaft (4). When the load exceeds the maximum output force of the hydraulic actuator (3), the hydraulic actuator (3) is reversely retracted under the action of the external load. When the hydraulic actuator (3) reaches the retracted position, the rocker arm (5) is driven to drive the rotating shaft (4) and the bucket body (2) to rotate, so that the bucket body (2) is retracted and enters the first compartment.

2. The retractable water-drawing structure for seaplanes at high speed and with high load according to claim 1 is characterized in that: The other end of the hydraulic actuator (3) is connected to a supporting joint on the aircraft.

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