Nacelle structure for hydrogen fuel cell stack of unmanned aerial vehicle

Abstract

The utility model relates to unmanned aerial vehicle hydrogen fuel cell stack's pod structure, including the cabin body of boat type, the cabin body includes the cabin shell, and the middle, front portion of cabin shell is fixedly connected with a plurality of cross bulkheads respectively, and the top of cross bulkhead and cabin shell is fixedly connected with the cabin cover of arc shape, and the rear portion of cabin shell is surrounded and is formed with fuel bin, and the middle, front portion of cabin shell is surrounded and is formed with a plurality of battery bin, and the battery bin is distributed between cross bulkhead and is provided with fuel cell stack, and the fuel bin is provided with the horizontal gas cylinder of storage, the fuel cell stack is placed in the slow shock base of rectangular ring, and the slow shock base is fixed on the inner bottom surface of cabin shell, and the front, rear end of fuel cell stack two side walls is fixedly connected with battery mounting support through bolt respectively, and battery mounting support is fixedly connected on cross bulkhead respectively. This pod structure is simple and compact, can accommodate multiple groups of fuel cell stack and corresponding gas cylinder, has effective shock attenuation effect simultaneously, protects fuel cell stack and gas cylinder, and has better security and anticorrosive performance.

Description

Technical Field

[0001] This utility model relates to the technical field of pods, and more specifically to the pod structure of hydrogen fuel cell stacks for unmanned aerial vehicles. Background Technology

[0002] A drone pod is a streamlined, short section installed under the fuselage or wings of a drone. Existing drone pods generally integrate payloads such as optoelectronic devices, electronic equipment, or weapons, serving as functional modules for target search, identification, tracking, positioning, and performing specific tasks. Current drones are typically powered by batteries, but battery charging takes a considerable amount of time. Therefore, some have proposed using hydrogen fuel cells to power drones, as hydrogen refueling is relatively fast and produces less pollution. However, due to limited space within the drone fuselage, it is impossible to install the corresponding fuel cell device. An external pod structure is a suitable load-bearing structure, thus requiring the design of a pod structure with a reasonable layout for the fuel cell device. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a pod structure for hydrogen fuel cell stacks in unmanned aerial vehicles (UAVs). The pod structure is simple and compact, capable of accommodating multiple fuel cell stacks and corresponding gas storage cylinders. It also has effective shock absorption, protects the fuel cell stacks and gas cylinders, and offers good safety and corrosion resistance.

[0004] The pod structure of the unmanned aerial vehicle (UAV) hydrogen fuel cell stack includes a boat-shaped hull, which includes a shell. Several transverse bulkheads are fixed to the middle and front parts of the shell. An arc-shaped hatch is fixed to the top of the transverse bulkheads and the shell. A fuel tank is formed in the rear of the shell. Several battery compartments are formed in the middle and front of the shell. The battery compartments are distributed between the transverse bulkheads and contain fuel cell stacks. Horizontal gas storage cylinders are installed inside the fuel compartments.

[0005] The fuel cell stack is placed on a rectangular ring-shaped shock-absorbing base, which is fixed to the inner bottom surface of the cabin. Battery mounting brackets are bolted to the front and rear ends of the two side walls of the fuel cell stack, and the battery mounting brackets are fixed to the transverse cabin walls. Ventilation windows opposite to the fuel cell stack are formed on the side walls of the cabin on both sides of the battery compartment. A power socket opposite the ventilation window is formed on the side wall of one side of the fuel cell stack. A rectangular heat dissipation window is formed on the bottom plate of the cabin in the middle of the shock-absorbing base. Several sets of cooling fans are arranged in an array at the bottom of the fuel cell stack and are opposite to the heat dissipation window.

[0006] A Z-shaped front support plate is welded and fixed between the front of the fuel tank and the transverse bulkhead. A rear support plate is welded and fixed to the bottom of the tank near the rear end. The rear support plate has a downwardly recessed rear placement groove in the middle, and the front support plate has a downwardly recessed front placement groove in the middle. The gas cylinder is placed in the rear placement groove of the rear support plate and the front placement groove of the front support plate and is fixed to the rear support plate and the front support plate by a semi-circular clamp. The tail of the gas cylinder abuts against the front support plate, and the head of the cylinder is fixedly connected to a hydrogen cylinder combination valve. A filling pipe and a supply pipe are fixedly connected to the hydrogen cylinder combination valve. The supply pipe has several branch pipes, and the ends of the branch pipes are fixedly connected to the hydrogen interface of the fuel cell stack. The end of the filling pipe is fixedly connected to a filling connector. The rear wall of the rear end of the tank has an adjustment window opposite to the hydrogen cylinder combination valve.

[0007] The outer surfaces of the transverse bulkhead, the front support plate, the rear support plate, the lower surface of the hatch cover, and the inner surface of the hull are all coated with an anti-corrosion coating; hydrogen leak sensors are fixedly connected to the fuel compartment and battery compartment of the hull.

[0008] Preferably, a shock-absorbing pad is fixedly connected to the upper surface of the hatch.

[0009] Preferably, an inflation port is formed on the side wall of the rear of the hatch, and an inflation connector is inserted into and fixed inside the inflation port and fitted with a protective cap.

[0010] Preferably, a front reinforcing base plate and a rear reinforcing base plate are fixed to the lower surfaces of the front and rear ends of the hull, respectively; the rear bearing support plate and the front bearing support plate are welded and fixed to the inner walls on both sides of the hull.

[0011] Preferably, the shock-absorbing base includes two sets of front and rear insulated horizontal support beams, which are made of rubber. The insulated horizontal support beams are formed with positioning grooves that are opposite to the fuel cell stack. A longitudinal support beam is provided between the ends of the two sets of insulated horizontal support beams. The longitudinal support beams are welded and fixed to the inner walls on both sides of the cabin. The insulated horizontal support beams are clamped between the longitudinal support beams and the transverse cabin walls, and the lower end face of the insulated horizontal support beams abuts against the inner bottom surface of the cabin.

[0012] Preferably, an electromagnetic valve is fixedly connected to the gas supply pipeline between the gas storage cylinder and the fuel cell stack;

[0013] The stern end of the cabin is fixedly connected to a sealing cover plate that covers the adjustment window, and a safety valve is installed and fixedly connected to the sealing cover plate.

[0014] The beneficial effects of this utility model are as follows:

[0015] This pod has a simple and compact structure, which can accommodate multiple fuel cell stacks and corresponding gas cylinders. It also has effective shock absorption, protects the fuel cell stacks and gas cylinders, and has good safety and corrosion resistance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a structural schematic diagram of the present invention viewed from below;

[0018] Figure 3 This is a three-dimensional structural diagram of the internal compartments of this utility model;

[0019] Figure 4 This is a top view of the internal compartment structure of this utility model;

[0020] Figure 5 This is a side view of the internal shell-less structure of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the internal shock-absorbing base of this utility model.

[0022] In the diagram: 1. Cabin; 11. Shell; 12. Cover; 13. Transverse bulkhead; 14. Battery mounting bracket; 15. Shock-absorbing base; 16. Front support bracket plate; 17. Rear support bracket plate; 18. Clamp; 19. Front reinforced base plate; 110. Rear reinforced base plate; 2. Fuel cell stack; 21. Power socket; 22. Cooling fan; 3. Gas storage cylinder; 4. Gas supply pipeline; 5. Gas filling connector; 6. Hydrogen cylinder combination valve. Detailed Implementation

[0023] Example: See Figures 1 to 5 As shown, the pod structure of the UAV hydrogen fuel cell stack includes a boat-shaped hull 1, which is fixed to the lower surface of the UAV fuselage and used as a pod. The hull 1 includes a shell 11, with several transverse bulkheads 13 fixed to the middle and front parts of the shell 11. An arc-shaped hatch 12 is fixed to the top of the transverse bulkheads 13 and the shell 11. A fuel compartment b is formed in the rear part of the shell 11. Several battery compartments a are formed in the middle and front parts of the shell 11. The battery compartments a are distributed between the transverse bulkheads 13 and have fuel cell stacks 2 installed. A horizontal gas storage cylinder 3 is installed in the fuel compartment b.

[0024] The fuel cell stack 2 is placed on a rectangular ring-shaped shock-absorbing base 15, which is fixed to the inner bottom surface of the housing 11. Battery mounting brackets 14 are bolted to the front and rear ends of the two side walls of the fuel cell stack 2, and the battery mounting brackets 14 are fixed to the transverse bulkhead 13. Ventilation windows 111 opposite to the fuel cell stack 2 are formed on the side walls of the housing 11 on both sides of the battery compartment a. A power socket 21 opposite to the ventilation window 111 is formed on one side wall of the fuel cell stack 2. A power socket 21 is connected to the power socket 21, and the power supply cable is used to power the UAV. A rectangular heat dissipation window 112 is formed on the bottom plate of the housing 11 in the middle of the shock-absorbing base 15. Several sets of cooling fans 22 are arranged in an array at the bottom of the fuel cell stack 2 and are opposite to the heat dissipation window 112.

[0025] A Z-shaped front support plate 16 is welded and fixed between the front hull 11 and the transverse bulkhead 13 of the fuel tank b. A rear support plate 17 is welded and fixed to the bottom of the hull 11 near the rear end. The rear support plate 17 has a downwardly recessed rear placement groove 171 in the middle, and the front support plate 16 has a downwardly recessed front placement groove 161 in the middle. The gas cylinder 3 is placed in the rear placement groove 171 of the rear support plate 17 and the front placement groove 161 of the front support plate 16 and is held in place by a semi-circular clamp. Hoop 18 is fixedly connected to the rear support plate 17 and the front support plate 16. The tail of the gas storage cylinder 3 abuts against the front support plate 16, and the head of the cylinder is fixedly connected to a hydrogen cylinder combination valve 6. A filling pipe and a gas supply pipe 4 are fixedly connected to the hydrogen cylinder combination valve 6. The gas supply pipe 4 is provided with several branch pipes, and the ends of the branch pipes are respectively fixedly connected to the hydrogen interface of the fuel cell stack 2. A filling connector 5 is fixedly connected to the end of the filling pipe. The rear wall of the tail end of the housing 11 is formed with an adjustment window 113 opposite to the hydrogen cylinder combination valve 6.

[0026] The outer surface of the transverse bulkhead 13, the outer surface of the front support plate 16, the outer surface of the rear support plate 17, the lower surface of the hatch cover 12, and the inner surface of the hull 11 are all coated with an anti-corrosion coating; hydrogen leakage sensors are fixedly connected to the fuel compartment b and the battery compartment a of the hull 1.

[0027] A shock-absorbing pad is fixedly connected to the upper surface of the canopy 12. When the UAV lands, the vibration of the fuselage is transmitted to the pod. The shock-absorbing pad can weaken the vibration and reduce the vibration of the pod.

[0028] An inflation port 114 is formed on the side wall at the rear of the hatch 12. An inflation connector 5 is inserted into and fixed inside the inflation port 114 and fitted with a protective cap, so that hydrogen can be filled into the gas cylinder 3 from the outside of the cabin 1. At the same time, the inflation connector 5 also blocks the inflation port 114.

[0029] The front and rear reinforcing base plates 19 and 110 are respectively fixed on the lower surfaces of the front and rear ends of the hull 11; the rear bearing support plate 17 and the front bearing support plate 16 are respectively welded and fixed to the inner walls on both sides of the hull 11. The above structure can provide strength to the hull 1.

[0030] See Figure 6 As shown, the shock-absorbing base 15 includes two sets of front and rear insulated horizontal support beams 151, which are made of rubber. The insulated horizontal support beams 151 have positioning grooves 1511 formed on them, which are opposite to the fuel cell stack 2. A longitudinal support beam 152 is provided between the ends of the two sets of insulated horizontal support beams 151, and the longitudinal support beams 152 are welded and fixed to the inner walls on both sides of the cabin 11. The insulated horizontal support beams 151 are clamped between the longitudinal support beams 152 and the transverse cabin wall 13, and the lower end face of the insulated horizontal support beams 151 abuts against the inner bottom surface of the cabin 11. The above structure is the specific structure of the shock-absorbing base 15, which facilitates the installation of the shock-absorbing base 15 and can provide shock absorption protection for the fuel cell stack 2.

[0031] An electromagnetic valve is fixedly connected to the gas supply pipeline 4 between the gas storage cylinder 3 and the fuel cell stack 2; the gas storage cylinder 3 supplies gas to the fuel cell stack 2 and cuts off the gas supply based on the opening and closing of the electromagnetic valve.

[0032] The tail end of the cabin 1 is fixedly connected to a sealing cover plate covering the adjustment window 113, and a safety valve is installed and fixedly connected to the sealing cover plate; the fuel tank b with the sealing cover plate is a sealed cavity, and when the gas storage cylinder 3 leaks, the leaked hydrogen is discharged by opening the safety valve to improve safety.

[0033] Working principle: This structure is a pod structure for a hydrogen fuel cell stack for a drone. The pod structure has a fuel cell stack 2 at the front and a gas storage cylinder 3 at the rear. The gas storage cylinder 3 can supply hydrogen to the fuel cell stack 2 through a gas supply pipeline 4. The fuel cell stack 2 generates electricity by reacting the hydrogen with the air input through the ventilation windows 111 on both sides of the casing 11, and the generated electricity is supplied to the drone. At the bottom of the casing 11, there is a heat dissipation window 112 for the fuel cell stack 2 to dissipate heat in a timely manner.

[0034] Meanwhile, the shock-absorbing base 15 based on the combination of rubber and metal can reduce the vibration of the fuel cell stack 2, protect the fuel cell stack 2, and reduce the impact of vibration.

[0035] Furthermore, the interior of chamber 1 is equipped with an anti-corrosion coating, which can reduce the corrosion of chamber 1 by hydrogen in the event of a hydrogen leak.

[0036] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A pod structure for a hydrogen fuel cell stack for an unmanned aerial vehicle (UAV), comprising a boat-shaped hull (1), the hull (1) comprising a shell (11), wherein several transverse bulkheads (13) are fixedly connected to the middle and front parts of the shell (11), and an arc-shaped hatch (12) is fixedly connected to the top of the transverse bulkheads (13) and the shell (11), characterized in that: The rear part of the cabin (11) is enclosed by a fuel tank (b), and the middle and front parts of the cabin (11) are enclosed by several battery tanks (a). The battery tanks (a) are distributed between the transverse cabin walls (13) and are equipped with fuel cell stacks (2). The fuel tank (b) is equipped with a horizontal gas storage cylinder (3). The fuel cell stack (2) is placed on a rectangular ring-shaped shock-absorbing base (15). The shock-absorbing base (15) is fixed to the inner bottom surface of the housing (11). The front and rear ends of the two side walls of the fuel cell stack (2) are respectively fixed with battery mounting brackets (14) by bolts. The battery mounting brackets (14) are respectively fixed to the transverse housing wall (13). Ventilation windows (111) opposite to the fuel cell stack (2) are formed on the side walls of the housing (11) on both sides of the battery compartment (a). A power socket (21) opposite to the ventilation window (111) is formed on the side wall of one side of the fuel cell stack (2). A rectangular heat dissipation window (112) is formed on the bottom plate of the housing (11) in the middle of the shock-absorbing base (15). Several sets of arrayed cooling fans (22) are arranged at the bottom of the fuel cell stack (2) and are opposite to the heat dissipation window (112). A Z-shaped front support plate (16) is welded and fixed between the front hull (11) and the transverse bulkhead (13) of the fuel tank (b). A rear support plate (17) is welded and fixed to the bottom of the hull (11) near the rear end. A downwardly recessed rear placement groove (171) is formed in the middle of the rear support plate (17), and a downwardly recessed front placement groove (161) is formed in the middle of the front support plate (16). The gas cylinder (3) is placed in the rear placement groove (171) of the rear support plate (17) and the front placement groove (161) of the front support plate (16) and passes through a semi-circular... The clamp (18) is fixed to the rear support plate (17) and the front support plate (16). The tail of the gas storage cylinder (3) abuts against the front support plate (16), and the head of the cylinder is fixedly connected to the hydrogen cylinder combination valve (6). The hydrogen cylinder combination valve (6) is fixedly connected to the filling pipe and the gas supply pipe (4). The gas supply pipe (4) is provided with several branch pipes, and the ends of the branch pipes are fixedly connected to the hydrogen interface of the fuel cell stack (2). The end of the filling pipe is fixedly connected to the filling connector (5). The rear wall of the tail end of the cabin (11) is formed with the adjustment window (113) opposite to the hydrogen cylinder combination valve (6). The outer surface of the transverse bulkhead (13), the outer surface of the front support plate (16), the outer surface of the rear support plate (17), the lower surface of the hatch cover (12), and the inner surface of the hull (11) are all coated with an anti-corrosion coating; hydrogen leakage sensors are fixedly connected to the fuel tank (b) and battery tank (a) of the hull (1).

2. The pod structure of the UAV hydrogen fuel cell stack according to claim 1, characterized in that: A shock-absorbing pad is fixedly connected to the upper surface of the hatch (12).

3. The pod structure of the UAV hydrogen fuel cell stack according to claim 1, characterized in that: An air inlet (114) is formed on the side wall at the rear of the hatch (12), and an air inlet connector (5) is inserted into the air inlet (114) and fitted with a protective cap.

4. The pod structure of the UAV hydrogen fuel cell stack according to claim 1, characterized in that: The front and rear reinforcing base plates (19 and 110) are respectively fixed on the lower surfaces of the front and rear ends of the hull (11); the rear bearing support plate (17) and the front bearing support plate (16) are respectively welded and fixed to the inner walls on both sides of the hull (11).

5. The pod structure of the UAV hydrogen fuel cell stack according to claim 3, characterized in that: The shock-absorbing base (15) includes two sets of front and rear insulated horizontal support beams (151), which are made of rubber. The insulated horizontal support beams (151) are formed with positioning grooves (1511) opposite to the fuel cell stack (2). A longitudinal support beam (152) is provided between the ends of the two sets of insulated horizontal support beams (151). The longitudinal support beams (152) are welded and fixed to the inner walls on both sides of the cabin (11). The insulated horizontal support beams (151) are sandwiched between the longitudinal support beams (152) and the transverse cabin wall (13). The lower end face of the insulated horizontal support beams (151) abuts against the inner bottom surface of the cabin (11).

6. The pod structure of the UAV hydrogen fuel cell stack according to claim 1, characterized in that: A solenoid valve is fixedly connected to the gas supply pipeline (4) between the gas storage cylinder (3) and the fuel cell stack (2); The tail end of the cabin (1) is fixedly connected to a sealing cover plate covering the adjustment window (113), and a safety valve is installed and fixedly connected to the sealing cover plate.

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