Oil tank

Abstract

The utility model discloses an oil tank, which belongs to the technical field of aircraft equipment, and comprises a tank body and a flow guide part, a first oil cavity is formed in the tank body, the tank body is provided with a first interface, a second interface and a third interface, and the first interface, the second interface and the third interface are respectively communicated with the first oil cavity; the first interface is arranged at the upper end of the box body, the second interface is arranged at the lower end of the box body, and the first interface and the second interface are oppositely arranged; the flow guide part is mounted in the first oil cavity; the flow guide piece is arranged between the first connector and the second connector. When oil of the first connector is extracted, the oil flows into or impacts on the flow guide part from the first connector, the oil of the first connector cannot act on the bottom of the first oil cavity at the first time, the oil is buffered through the flow guide part and then flows into the second connector, the oil of the first connector cannot directly act on the second connector, and oil mixed with air is prevented from flowing into the second connector; therefore, oil with air can be prevented from entering the engine, and the engine is prevented from stopping working after sucking air.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft equipment, in particular to a fuel tank. BACKGROUND

[0002] When the fixed-wing aircraft flies in the air, due to the vibration of the aircraft body and the deflection of the attitude, air bubbles will be generated in the fuel tank, and the air in the air bubbles will enter the engine with the oil supply system, which will cause the engine of the aircraft to run out of oil and cause the engine to stall, resulting in the risk of crashing. Although some anti-bubble fuel tanks are disclosed, most of these fuel tanks have unreasonable structure design, and the anti-bubble effect is not ideal. SUMMARY

[0003] The utility model aims at improving the problem that the existing fuel tank is not ideal in preventing air bubbles or eliminating air bubbles, and provides a fuel tank.

[0004] The technical scheme for achieving the above-mentioned purpose comprises the following:

[0005] The fuel tank comprises:

[0006] A tank body is formed in the tank body, and the tank body has a first interface, a second interface and a third interface, which are respectively communicated with the first oil cavity; the first interface is arranged at the upper end of the tank body, the second interface is arranged at the lower end of the tank body, and the first interface and the second interface are oppositely arranged;

[0007] A flow guide piece is installed in the first oil cavity; wherein the flow guide piece is arranged between the first interface and the second interface.

[0008] In one embodiment, the flow guide piece is arranged close to the first interface or the second interface, an oil passage is formed between the first interface and the second interface, and the flow guide piece is arranged on the oil passage.

[0009] In one embodiment, the flow guide piece is arranged close to the first interface, the flow guide piece is concave to form a flow guide groove, the flow guide groove has a reflective bottom wall, and the reflective bottom wall is arranged towards the first interface.

[0010] In one embodiment, the first interface is located at the top end of the fuel tank, and the second interface and the third interface are located at the bottom end of the fuel tank.

[0011] In one embodiment, the fuel tank further comprises a filter piece, a second oil cavity is formed in the filter piece, the filter piece has a filter hole, the filter piece is installed in the first oil cavity, the first oil cavity is communicated with the second oil cavity through the filter hole, and the second oil cavity is communicated with the second interface;

[0012] The flow guide piece is installed at the top end of the filter piece.

[0013] In one of the embodiments, the top end of the filter has an exhaust hole, and the second oil cavity is communicated with the first oil cavity and the first interface through the exhaust hole.

[0014] In one of the embodiments, the box body comprises a first cover, an outer shell, a second cover and two sealing rings, the first cover and the second cover are oppositely provided with clamping grooves, the two sealing rings are respectively arranged in the clamping grooves of the first cover and the second cover, and the two ends of the outer shell are respectively arranged in the clamping grooves of the first cover and the second cover.

[0015] In one of the embodiments, the oil tank comprises at least two groups of fixing assemblies, the two groups of fixing assemblies are arranged on the circumference of the box body and oppositely arranged, and the two ends of the fixing assembly are respectively fixed with the first cover and the second cover.

[0016] In one of the embodiments, the fixing assembly comprises a connecting rod and two fasteners, the two ends of the connecting rod are respectively provided with mounting holes, the first cover and the second cover are respectively provided with through holes, the first ends of the fasteners pass through the through holes, so that the first cover and the second cover are fixed with the two ends of the connecting rod through the fasteners, the fasteners are threadedly connected with the mounting holes, and the second ends of the fasteners abut against the first cover and the second cover.

[0017] In one of the embodiments, the oil tank comprises a first joint, a second joint and a third joint, the first joint has a first interface, the second joint has a second interface, and the third joint has a third interface.

[0018] The first joint, the second joint and the third joint are respectively detachably connected with the box body.

[0019] The technical scheme provided by the utility model has the following advantages and effects:

[0020] When the engine works, the second interface starts to draw oil at the bottom end of the box body, and because the aircraft is in an inclined or vibrating state during flight, the oil and air in the storage main tank are easy to flow into the first oil cavity through the first interface. By arranging the flow guide between the first interface and the second interface, when the oil in the first interface is drawn, the oil flows into or impacts on the flow guide, and the oil in the first interface cannot act on the bottom of the first oil cavity at the first time, the oil is buffered by the flow guide and then flows into the second interface, and the oil in the first interface cannot directly act on the second interface, so as to avoid the oil mixed with air flowing into the second interface, thereby preventing the oil with air from entering the engine, avoiding the engine from stopping working due to air suction, and avoiding the risk of aircraft crash. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0022] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0023] Figure 1 This is a schematic diagram of the fuel tank in one embodiment of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the fuel tank in one embodiment of the utility model. Figure 2 ;

[0025] Figure 3 It is a cross-sectional view of a fuel tank in one embodiment of the present utility model;

[0026] Description of reference numerals:

[0027] 100. Fuel tank;

[0028] 1. Box body; 11. Housing; 111. First oil chamber; 12. First cover; 13. Second cover; 14. Sealing ring;

[0029] 2. First connector; 21. First interface;

[0030] 3. Second connector; 31. Second interface;

[0031] 4. Third connector; 41. Third interface;

[0032] 5. Fixing assembly; 51. Connecting rod; 511. Mounting hole; 52. Fastener;

[0033] 6. Filter element; 61. Second oil chamber; 62. Filter hole; 63. Exhaust hole;

[0034] 7. Flow guide; 71. Flow guide groove. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0036] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0037] The term "and / or," as used herein, unless otherwise specified and / or as is customary under the circumstances, is to be interpreted to mean either one or all of the associated listed items.

[0038] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or intervening elements can also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present; when an element is referred to as being "mounted" to another element, it can be directly mounted to the other element or intervening elements can also be present. When an element is referred to as being "disposed" in another element, it can be directly disposed in the other element or intervening elements can also be present.

[0039] The utility model provides a kind of oil tank 100, as shown in Figures 1 to 3 The first oil cavity 111 is formed in the tank body 1, and the tank body 1 has a first interface 21, a second interface 31 and a third interface 41, which are in communication with the first oil cavity 111 respectively. The first interface 21 is arranged at the upper end of the tank body 1, the second interface 31 is arranged at the lower end of the tank body 1, and the first interface 21 and the second interface 31 are arranged oppositely. The flow guide 7 is installed in the first oil cavity 111. The flow guide 7 is arranged between the first interface 21 and the second interface 31.

[0040] Specifically, the first interface 21 is used for communication with the main oil tank, the second interface 31 is used for communication with the oil pipeline of the engine, and the third interface 41 is used for communication with the oil filler or oil pipeline. Since the first interface 21 is arranged at the upper end of the tank body 1, the second interface 31 is arranged at the lower end of the tank body 1, and the third interface 41 can be arranged at the side or bottom of the tank body 1. When the refueling equipment fills oil through the third interface 41 towards the first oil cavity 111, the engine is in a stopped working state, the second interface 31 cannot pump oil from the first oil cavity 111, the oil in the first oil cavity 111 is slowly delivered and filled by the third interface 41, and the air in the first oil cavity 111 is squeezed and discharged into the main oil tank. Since the first interface 21 is located at the upper end of the tank body 1, when the first oil cavity 111 is filled with oil, the air in the first oil cavity 111 will be completely discharged into the main oil tank.

[0041] When the engine works, the second interface 31 starts to pump oil at the bottom end of the tank 1. Because the aircraft is in the process of flight, the storage main tank is in a state of tilt or vibration, the oil and air of the storage main tank is easy to flow into the first oil cavity 111 from the first interface 21. By setting the flow guide piece 7 between the first interface 21 and the second interface 31, when the oil of the first interface 21 is pumped, the oil of the first interface 21 flows or impacts on the flow guide piece 7, the oil of the first interface 21 cannot act on the bottom of the first oil cavity 111 at the first time, the oil is buffered by the flow guide piece 7 and then flows into the second interface 31, the oil of the first interface 21 cannot directly act on the second interface 31, avoiding the oil mixed with air flowing into the second interface 31, which can prevent the oil with air from entering the engine, avoid the engine from stopping working after sucking air, and avoid the risk of the aircraft crashing.

[0042] In addition, when the first oil cavity 111 pumps oil, the oil of the second interface 31 is transported into the engine, even if the first oil cavity 111 has bubbles, because the air in the bubbles has a smaller density than the oil, that is, the first oil cavity 111 has bubbles, the bubbles also float on the surface of the oil, and the bubbles are away from the second interface 31. Therefore, when the second interface 31 pumps oil, the bubbles will not enter the second interface 31 with the oil.

[0043] Preferably, the flow guide piece 7 is arranged close to the first interface 21 or the second interface 31, an oil path channel is formed between the first interface 21 and the second interface 31, and the flow guide piece 7 is arranged on the oil path channel. Specifically, when the oil tank 100 is vertically placed, and the first interface 21 pumps oil, the oil flows from the first interface 21 to the second interface 31, the first interface 21 and the second interface 31 form an oil path channel, and the flow guide piece 7 is arranged on the oil path channel. When the oil impacts on the flow guide piece 7, the flow guide piece 7 blocks the oil, avoiding the oil of the first interface 21 directly impacting and flowing to the second interface 31, and further avoiding the air mixed in the oil from entering the second interface 31.

[0044] When the oil tank 100 is in an inclined state, in order to avoid the oil of the first interface 21 directly impacting and falling into the first oil cavity 111, the flow guide piece 7 is arranged close to the first interface 21, the distance between the flow guide piece 7 and the first interface 21 is close, so that the oil of the first interface 21 is more likely to impact on the flow guide piece 7, improving the adaptability of the flow guide piece 7. When the flow guide piece 7 is arranged close to the second interface 31, the flow guide piece 7 blocks the second interface 31, avoiding the oil of the first interface 21 directly impacting or acting on the second interface 31.

[0045] Preferably, the flow guide 7 is arranged close to the first interface 21, the flow guide 7 is concave to form a flow guide groove 71, the flow guide groove 71 has a reflective bottom wall, the reflective bottom wall is arranged towards the first interface 21. Specifically, when the flow guide 7 is arranged close to the first interface 21, the oil of the first interface 21 impacts on the reflective bottom wall, the reflective bottom wall is used to reflect the oil to the upper end of the tank 1, so that the oil flows or drips into the first oil cavity 111 from the upper end of the tank 1 after being reflected, which realizes the buffering of the oil into the first oil cavity 11 and further avoids the air mixed with the oil from entering the second interface 31.

[0046] Preferably, the first interface 21 is located at the topmost end of the oil tank 100, the second interface 31 and the third interface 41 are located at the bottommost end of the oil tank 100, and the first interface 21 is arranged staggered with the second interface 31. Specifically, since the second interface 31 and the third interface 41 are at the lowest end, the pressure at the bottom of the oil tank 100 is the largest, and the oil is more easily sucked into the engine; moreover, after the aircraft is used, the oil in the first oil cavity can be sucked through the third interface 41, avoiding the oil remaining in the first oil cavity 111. Moreover, the first interface 21 is arranged staggered with the second interface 31, which can increase the distance of the oil passage, further buffering the oil of the first interface 21 into the second interface 31.

[0047] Preferably, the flow guide groove 71 has at least two, and the bottom wall of the flow guide groove 71 has an inner arc surface. In this embodiment, due to the flight attitude of the aircraft, the oil tank 100 can be in an inclined state, the number of flow guide grooves 71 is set to four, and the four flow guide grooves 71 are distributed below the first interface 21. The oil of the first interface 21 flows to any one of the flow guide grooves 71, and any one of the flow guide grooves 71 plays a certain buffering role for the oil of the first interface 21.

[0048] In some embodiments, the oil tank 100 also has a filter 6, the filter 6 forms a second oil cavity 61 therein, the filter 6 has a filter hole 62, the filter 6 is installed in the first oil cavity 111, the first oil cavity 111 communicates with the second oil cavity 61 through the filter hole 62, the second oil cavity 61 communicates with the second interface 31; and the flow guide 7 is installed at the top end of the filter 6. Specifically, the filter 6 is used to filter impurities in the oil, avoiding impurities in the first oil cavity 111 from entering the second oil cavity 61, so that the gasoline flowing into the engine through the second interface 31 is more pure; moreover, the flow guide 7 is installed at the top end of the filter 6, which can set the flow guide 7 and the filter 6 as an integrated structure, or use the top of the filter 6 as the flow guide 7, avoiding additional processing and installation of the flow guide 7, and improving the utilization efficiency of each component.

[0049] Preferably, the top of the filter element 6 has an exhaust hole 63, and the second oil chamber 61 is connected to the first oil chamber 111 and the first interface 21 through the exhaust hole 63. Specifically, when the third interface 41 is refueling, oil enters the first oil chamber 111 from the third interface 41, and the oil first fills the bottom of the fuel tank 100. The oil then enters the second oil chamber 63 through the filter hole 62. As the second oil chamber 63 gradually fills, the air in the second oil chamber 61 is discharged into the first oil chamber 111 through the exhaust hole 63. When the first oil chamber 111 is filled, the air in the first oil chamber 111 is discharged through the first interface 21, thereby preventing air from remaining in the first oil chamber 111 and the second oil chamber 61 of the tank body 1 when the fuel tank 100 is refueling.

[0050] In addition, fuel tank 100 also contains a liquid level sensor, which is electrically connected to the aircraft and is typically located at the bottom of tank body 1. This sensor is used to monitor the liquid level within tank body 1. When the oil in first oil chamber 111 reaches a preset level, indicating that the gasoline in the main fuel tank has been depleted and that the gasoline in tank body 1 is also about to be depleted, the liquid level sensor will send an electrical signal to the aircraft's flight control system, which will control the aircraft to land safely, thereby avoiding the risk of a crash due to the engine running out of gasoline.

[0051] In some embodiments, to improve the sealing performance of the first oil chamber 111, the housing 1 includes a first cover 12, an outer shell 11, a second cover 13, and two sealing rings 14. The first cover 12 and the second cover 13 are provided with opposing slots, and the two sealing rings 14 are respectively disposed in the slots of the first cover 12 and the second cover 13. The ends of the outer shell 11 are respectively disposed in the slots of the first cover 12 and the second cover 13. The first cover 12 and the outer shell 11, as well as the second cover 13 and the outer shell 11, are sealed by the sealing rings 14. The first oil chamber 111 is formed between the first cover 12, the outer shell 11, and the second cover 13. Specifically, the two sealing rings 14 are used to seal the first cover 12 with the first end of the outer shell 11, and the second cover 13 with the second end of the outer shell 11, thereby improving the sealing performance of the first oil chamber 111. Furthermore, the second cover 13 has a fixing hole through which the housing 1 can be fixed to the aircraft. The housing 11 is at least partially disposed in the slots of the first cover 12 and the second cover 13 , which can improve the stability of the connection between the housing 11 and the first cover 12 and the second cover 13 .

[0052] In order to further improve the overall stability of the oil tank 100, preferably, the oil tank 100 comprises at least two sets of fixing assemblies 5, which are arranged on the circumference of the tank body 1 and oppositely arranged; the two ends of the fixing assembly 5 are fixed with the first cover 12 and the second cover 13 respectively. By arranging two sets of fixing assemblies 5, the fixing assembly 5 can improve the stability of the connection between the first cover 12 and the second cover 13 and the two ends of the shell 11, and when the fixing assembly 5 drives the first cover 12 and the second cover 13 to extrude the two ends of the shell 11, the sealing ring 14 is also extruded by the two ends of the shell 11, which can further improve the sealing performance of the first oil cavity 111.

[0053] Preferably, the fixing assembly 5 comprises a connecting rod 51 and two fasteners 52, both ends of the connecting rod 51 are provided with mounting holes 511, the first cover 12 and the second cover 13 are both provided with through holes, the first end of the fastener 52 passes through the through hole, so that the first cover 12 and the second cover 13 are fixed with the two ends of the connecting rod 51 through the fastener 52, the fastener 52 is screwed with the mounting hole 511, and the second end of the fastener 52 abuts against the first cover 12 and the second cover 13. Specifically, the first end of the fastener 52 passes through the through hole and is screwed with the mounting hole 511, and rotating the fastener 52 can make the first cover 12 and the second cover 13 close to each other, thereby improving the sealing performance of the first cover 12 and the second cover 13 with the two ends of the shell 11 respectively.

[0054] In some embodiments, the oil tank 100 comprises a first joint 2, a second joint 3 and a third joint 4, the first joint 2 has a first interface 21, the second joint 3 has a second interface 31, and the third joint 4 has a third interface 41; the first joint 2, the second joint 3 and the third joint 4 are detachably connected with the tank body 1. Specifically, the first interface 21, the second interface 31 and the third interface 41 are arranged on the first joint 2, the second joint 3 and the third joint 4 respectively, which can be individually arranged on each interface according to the required direction, thereby improving the adaptability; and the first joint 2, the second joint 3 and the third joint 4 are detachably connected with the tank body 1, which facilitates the separate processing and assembly of each part.

[0055] When referring to the drawings, the new features appearing are described; in order to avoid the description being not concise due to repeated reference to the drawings, the features that have been described are not repeatedly referred to the drawings.

[0056] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical scheme of the present application, and to completely describe the technical scheme, purpose and effect of the present application, which is to make the public understand the disclosure of the present application more thoroughly and comprehensively, and does not limit the protection scope of the present application.

[0057] The above embodiments are not exhaustive enumeration based on the utility model, in addition, there can be a plurality of other embodiments not listed. Any replacement and improvement made without violating the concept of the utility model is within the scope of protection of the utility model.

Claims

1. Fuel tank, characterized in that, include: A box body, wherein a first oil chamber is formed in the box body, and the box body has a first interface, a second interface, and a third interface, wherein the first interface, the second interface, and the third interface are respectively connected to the first oil chamber; the first interface is arranged at the upper end of the box body, and the second interface is arranged at the lower end of the box body, and the first interface and the second interface are arranged opposite each other; and a flow guide member, which is installed in the first oil chamber; wherein the flow guide member is arranged between the first interface and the second interface.

2. The fuel tank according to claim 1, wherein The flow guide is arranged close to the first interface or the second interface, an oil passage is formed between the first interface and the second interface, and the flow guide is arranged on the oil passage.

3. The fuel tank according to claim 1, wherein: The guide member is arranged close to the first interface, and the guide member is concave to form a guide groove. The guide groove has a reflective bottom wall, and the reflective bottom wall is arranged toward the first interface.

4. The fuel tank according to claim 1, wherein The first interface is located at the top of the fuel tank, and the second interface and the third interface are located at the bottom of the fuel tank. The first interface and the second interface are staggered.

5. The fuel tank according to any one of claims 1 to 4, characterized in that The oil tank further comprises a filter element, a second oil chamber is formed in the filter element, the filter element has a filter hole, the filter element is installed in the first oil chamber, the first oil chamber is connected to the second oil chamber through the filter hole, and the second oil chamber is connected to the second port; The flow guide is installed on the top of the filter.

6. The fuel tank according to claim 5, characterized in that The top end of the filter element is provided with an exhaust hole, and the second oil chamber is communicated with the first oil chamber and the first interface through the exhaust hole.

7. The fuel tank according to any one of claims 1 to 4, characterized in that The box body includes a first cover body, an outer shell, a second cover body, and two sealing rings. The first cover body and the second cover body are provided with grooves opposite to each other, and the two sealing rings are respectively arranged in the grooves of the first cover body and the second cover body. The two ends of the outer shell are respectively arranged in the grooves of the first cover body and the second cover body. The first cover body and the outer shell, and the second cover body and the outer shell are sealed by the sealing rings. The first oil chamber is formed between the first cover body, the outer shell, and the second cover body.

8. The fuel tank according to claim 7, wherein: The oil tank includes at least two groups of fixing components, which are arranged on the circumference of the tank body and are arranged opposite to each other; two ends of the fixing components are respectively fixed to the first cover body and the second cover body.

9. The fuel tank according to claim 8, wherein The fixing assembly includes a connecting rod and two fasteners. Both ends of the connecting rod are provided with mounting holes. Both the first cover body and the second cover body are provided with through holes. The through holes are for the first ends of the fasteners to pass through, so that the first cover body and the second cover body are fixed to the two ends of the connecting rod by the fasteners. The fasteners are threadedly connected to the mounting holes, and the second ends of the fasteners are against the first cover body and the second cover body.

10. The fuel tank according to any one of claims 1 to 4, characterized in that The fuel tank includes a first joint, a second joint, and a third joint, wherein the first joint has a first interface, the second joint has a second interface, and the third joint has a third interface; The first connector, the second connector and the third connector are respectively detachably connected to the box body.

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