Lubricating oil tank for unmanned aerial vehicle engine

Abstract

The lubricating oil tank comprises a tank body provided with an oil storage cavity, a lubricating oil filling port and a ventilation port are formed in the upper portion of the tank body, a lubricating oil outflow port is formed in the lower portion of the tank body, and a transverse partition plate and a vertical partition plate which are connected with the inner wall of the tank body are arranged in the tank body. And oil through holes are formed in the transverse partition plate and the vertical partition plate in a penetrating manner. According to the scheme, the problem that in the prior art, a lubricating oil tank is prone to oil spilling is solved.

Description

Technical Field

[0001] The invention relates to a lubrication system of an unmanned aircraft engine, in particular to a lubricating oil tank used for the unmanned aircraft engine. Background Art

[0002] The lubricating oil tank for the engine of an unmanned aerial vehicle is a device for storing and supplying lubricating oil to the engine of an unmanned aerial vehicle. The existing lubricating oil tank includes a box body provided with an oil storage cavity, a lubricating oil filling port for filling the oil storage cavity with lubricating oil is provided at the top, and a lubricating oil outflow port for the oil storage cavity to discharge the lubricating oil by gravity is provided at the bottom; the box body is detachably connected to a box cover with a vent hole at the lubricating oil filling port, so that after the oil filling of the lubricating oil tank is completed, the lubricating oil filling port is sealed by the box cover and at the same time, the oil storage cavity maintains air pressure balance with the external environment of the box body through the vent hole.

[0003] However, when the existing lubricating oil tank is used for some unmanned aerial vehicles, such as when the lubricating oil tank is used for cruise missiles, during the flight of the cruise missile, the lubricating oil tank will be subjected to nearly 100 times the acceleration of gravity, and will also be subjected to large amplitude and high frequency vibration, causing the lubricating oil in the lubricating oil tank to overflow from the vent hole of the tank cover, resulting in a significant increase in the consumption of lubricating oil, thereby causing the engine of the unmanned aerial vehicle to fail due to the inability to obtain lubrication for a specified period of time, resulting in a significant reduction in the flight time of the unmanned aerial vehicle. In addition, some unmanned aerial vehicles will take off by high-speed launch, such as some cruise missiles that take off by high-speed launch, and the lubricating oil tanks used in these types of unmanned aerial vehicles are not only prone to oil overflow from the vent hole, but also to crack and leak oil, which greatly increases the consumption of lubricating oil, thereby causing the engine to fail due to the inability to obtain lubrication for a specified period of time, and further causing the flight time of the unmanned aerial vehicle to be seriously insufficient.

[0004] Chinese patent document CN117231366A discloses a static oil mist separation tank, comprising a shell, which forms a cavity for containing oil; a rotary plate centrifugal separator, which is arranged in the shell, and the rotary plate centrifugal separator is connected to the lubricating oil inlet through a lubricating oil pipeline; a partition, which is arranged above the rotary plate centrifugal separator, and a plurality of radial partitions are arranged between the partition and the top of the tank shell, so as to form a plurality of layers of annular channels from the outside to the inside, and a plurality of filtering devices are arranged in each layer of the annular channel; wherein, a gap is arranged at the edge of the outermost annular channel to connect the cavity, and the oil mist in the cavity is filtered along the filtering devices of the annular channel layer by layer after passing through the gap, and finally discharged from the exhaust outlet of the exhaust cap installed on the shell. The static oil mist separator of the prior art solution can meet the lubricating oil consumption requirements of the gas turbine, save the layout space, and reduce the maintenance cycle and maintenance cost. However, the technical solution needs to add a plurality of filtering devices in the lubricating oil tank, which will lead to the problems of complex structure, increased weight, reduced volume and greatly increased cost of the lubricating oil tank, and therefore is not suitable for adoption. Summary of the invention

[0005] The object of the present invention is to provide a lubricating oil tank for an unmanned aerial vehicle engine, so as to solve the problem that the lubricating oil tank in the prior art is prone to oil overflow.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a lubricating oil tank for an unmanned aerial vehicle engine, including a box body provided with an oil storage cavity, the upper part of the box body is provided with a lubricating oil filling port and a vent, the lower part of the box body is provided with a lubricating oil outflow port, the interior of the box body is provided with a transverse partition and a vertical partition connected to the inner wall of the box body, and the transverse partition and the vertical partition are both penetrated by an oil through hole.

[0007] The beneficial effects of this basic scheme are: by arranging vertical partitions, transverse partitions and oil holes inside the box body, the vertical partitions and transverse partitions divide the oil storage chamber into a plurality of interconnected small chambers, so that the lubricating oil cannot form a violent surge phenomenon in the oil storage chamber, thereby greatly reducing the phenomenon of lubricating oil overflowing from the vent, and greatly reducing the consumption of lubricating oil; at the same time, the transverse partitions and vertical partitions can well disperse the forces acting on the box body of the lubricating oil tank, thereby greatly reducing the rupture and oil leakage of the lubricating oil tank on the unmanned aerial vehicle launched at high speed. Compared with the prior art, the adoption of this scheme can greatly reduce the overflow and leakage of the lubricating oil tank, thereby greatly reducing the lubricating oil consumption of the unmanned aerial vehicle, thereby ensuring the normal operation of the unmanned aerial vehicle engine and meeting the flight time requirements of the unmanned aerial vehicle, especially the flight time requirements of the unmanned aerial vehicle that adopts high-speed launch and high-acceleration operation.

[0008] Preferably, the transverse partition and the vertical partition are fixedly connected to each other. With such an arrangement, the transverse partition and the vertical partition support each other, so that the transverse partition, the vertical partition and the box body can better disperse the force of the lubricating oil inside the box body on the lubricating oil box and the force when the outside of the lubricating oil box is impacted, thereby further reducing the occurrence of rupture and oil leakage of the lubricating oil box.

[0009] Preferably, the transverse partition is integrally formed with the vertical partition. More preferably, the transverse partition and the vertical partition are integrally formed with the box body. With such a configuration, the transverse partition, the vertical partition and the box body are integrally formed, thereby reducing the subsequent connection operations and other processes, which is beneficial to improving the bearing capacity of the lubricating oil box against internal and external effects while reducing the processing cost.

[0010] Preferably, the oil holes are distributed along the edges of the transverse partitions and the edges of the vertical partitions. With such an arrangement, when the lubricating oil is squeezed toward the partitions, the lubricating oil is dispersed around the partitions under the action of the oil holes, thereby helping to reduce the force on the partitions and further improving the structural stability of the lubricating oil tank.

[0011] Preferably, a labyrinth passage is provided inside the box, and the vent is connected to the oil storage chamber through the labyrinth passage. With such a configuration, the labyrinth passage can further reduce the situation where the lubricating oil overflows from the vent, thereby further reducing the consumption of the lubricating oil.

[0012] Preferably, a baffle is provided on the top of the box body, a buffer cavity is formed between the baffle and the top wall of the box body, a first communication port is provided between the buffer cavity and the labyrinth passage, and a second communication port connected to the oil storage cavity is provided at a position of the buffer cavity away from the first communication port. With such a configuration, the lubricating oil in the oil storage cavity can be better reduced from gathering toward the vent, thereby further reducing the occurrence of lubricating oil overflowing from the vent, thereby reducing the consumption of lubricating oil.

[0013] Preferably, an oil shield is provided in the oil storage cavity to cover the oil outlet, and oil guide holes are provided on the top and bottom of the oil shield. With such a configuration, the squeezing effect of the oil in the oil storage cavity on the oil outlet can be reduced, thereby avoiding the occurrence of excessive pressure at the oil outlet.

[0014] The oil shield is integrally formed with the box body, which is helpful to simplify the manufacturing process and reduce the processing cost.

[0015] The present invention has the following beneficial effects:

[0016] Compared with the prior art, the present invention provides vertical partitions, transverse partitions and oil holes inside the box body, so that the vertical partitions and transverse partitions divide the oil storage chamber into a plurality of interconnected small chambers, thereby preventing the lubricating oil from forming a violent surge in the oil storage chamber, thereby greatly reducing the phenomenon of lubricating oil overflowing from the vent, and greatly reducing the consumption of lubricating oil; at the same time, the transverse partitions and vertical partitions can form a pulling effect between the inner walls of the box body of the lubricating oil tank, thereby well dispersing the force acting on the box body, thereby greatly reducing the rupture and oil leakage of the lubricating oil tank on the unmanned aerial vehicle launched at high speed, and greatly reducing the overflow and leakage of the lubricating oil tank, thereby greatly reducing the lubricating oil consumption of the unmanned aerial vehicle, thereby ensuring the normal operation of the unmanned aerial vehicle engine and meeting the flight time requirements of the unmanned aerial vehicle, especially the flight time requirements of the unmanned aerial vehicle that adopts high-speed launch and high-acceleration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an oil tank embodiment of an unmanned aerial vehicle engine according to the present invention;

[0018] Figure 2 for Figure 1 BB section view in;

[0019] Figure 3 for Figure 1 A-direction view in the figure;

[0020] Figure 4 for Figure 3 CC section view in. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The figure marks in the drawings of the specification include: lubricating oil filling port 1, air vent 2, lubricating oil outflow pipe 3, box body 4, first connecting port 5, buffer chamber 6, second connecting port 7, labyrinth passage 8, baffle 9, transverse partition 10, vertical partition 11, oil through hole 12, oil shield 13, oil guide hole 14.

[0023] The embodiment is basically as shown in the attached Figures 1 to 4 As shown: A lubricating oil tank for an unmanned aerial vehicle engine includes a box body 4, an oil filling port 1 and a vent 2 are provided at the upper portion of the box body 4, and an oil outlet is provided at the lower portion of the box body 4. In this embodiment, the oil outlet extends downward to form an oil outlet pipe 3. The box body 4 is provided with a transverse partition 10 and a vertical partition 11 connected to the inner wall of the box body 4, and both the transverse partition 10 and the vertical partition 11 are penetrated with an oil through hole 12.

[0024] In this embodiment, the transverse partition 10 and the vertical partition 11 are fixedly connected to each other. Preferably, the transverse partition 10, the vertical partition 11 and the box body 4 are integrally formed, so as to improve the integrity of the entire lubricating oil box. In this embodiment, the oil holes 12 are distributed along the edges of the transverse partition 10 and the edges of the vertical partition 11, so that when the lubricating oil is squeezed toward the partition, the lubricating oil is dispersed toward the surroundings of the partition under the action of the oil holes 12, so as to reduce the force on the partition; and when the lubricating oil box is tilted, the lubricating oil in the box body 4 will gather at the edge of the partition. By setting the oil holes 12 at the edge of the partition, it is beneficial for the lubricating oil to quickly pass through the partition and gather at the lowest point of the box body 4.

[0025] In this embodiment, a labyrinth passage 8 is provided inside the box body 4, and the vent 2 is connected to the oil storage chamber through the labyrinth passage 8. In this embodiment, a baffle 9 is provided at the top of the box body 4, and a buffer chamber 6 is formed between the baffle 9 and the top wall of the box body 4. A first connecting port 5 is provided between the buffer chamber 6 and the labyrinth passage 8, and a second connecting port 7 connected to the oil storage chamber is provided at a position of the buffer chamber 6 away from the first connecting port 5. In this embodiment, the second connecting port 7 is preferably provided at the edge of the baffle 9. The lubricating oil filling port 1 is connected to the top of the buffer chamber 6.

[0026] In this embodiment, an oil shield 13 is provided in the oil storage cavity to cover the oil outlet, and oil guide holes 14 are provided through the top and bottom of the oil shield 13. The oil shield 13 can reduce the squeezing effect of the oil in the oil storage cavity on the oil outlet, thereby avoiding the occurrence of excessive pressure at the oil outlet. In this embodiment, the oil shield 13 is integrally formed with the box body 4.

[0027] In this solution, vertical partitions 11, transverse partitions 10 and oil holes 12 are arranged inside the box body 4, so that the vertical partitions 11 and the transverse partitions 10 divide the oil storage chamber into a plurality of small chambers interconnected with each other, so that the lubricating oil cannot form a violent surge phenomenon in the oil storage chamber, thereby greatly reducing the phenomenon of lubricating oil overflowing from the vent 2, and greatly reducing the consumption of lubricating oil; at the same time, the transverse partitions 10 and the vertical partitions 11 can well disperse the force acting on the box body 4 of the lubricating oil tank, thereby greatly reducing the rupture and oil leakage of the lubricating oil tank on the unmanned aerial vehicle launched at high speed, and greatly reducing the overflow and leakage of the lubricating oil tank, thereby greatly reducing the lubricating oil consumption of the unmanned aerial vehicle, thereby ensuring the normal operation of the unmanned aerial vehicle engine and meeting the flight time requirements of the unmanned aerial vehicle, especially the flight time requirements of the unmanned aerial vehicle that adopts high-speed launch and high-acceleration operation.

[0028] By testing and comparing the lubricating oil tank of this scheme with the lubricating oil tank before improvement, the following comparative data are obtained:

[0029] (a) Anti-riot performance test

[0030] The specific test process is: seal the air vent and oil filling port of the oil tank, fill in compressed air from the oil outflow port, record the rupture location and number of the oil tank under pressurization for 1 minute, and record the pressure of the compressed air at this time.

[0031] The test results of the lubricating oil box of the present invention and the lubricating oil box before improvement are shown in the following table.

[0032]

[0033] From the results of the above anti-burst performance test, it can be seen that the ultimate bursting pressure of the oil tank of the present invention is 260 kPa, which is much higher than the ultimate bursting pressure of 80 kPa of the oil tank before improvement, thereby concluding that the anti-burst performance of the oil tank of the present invention is significantly improved.

[0034] (b) Oil spill prevention test

[0035] The specific test process is: assemble two types of lubricating oil tanks on engines of the same model, and then use the same test bench to test the engines with different lubricating oil tanks respectively, and simulate the representative working state of the unmanned aerial vehicle through the test bench and continue to work for a period of time; read the lubricating oil consumption in the engine ECU by using INCA software, and convert it to the theoretical lubricating oil consumption per hour; measure the actual weight difference of the lubricating oil in the lubricating oil tank in the same time period, and convert it to the actual lubricating oil consumption per hour. The test results of the lubricating oil tank of the present invention and the lubricating oil tank before improvement are shown in the following table.

[0036]

[0037] It can be seen from the above table that the actual lubricating oil consumption of the engine using the improved lubricating oil tank is about 10 times the theoretical lubricating oil consumption, while the actual lubricating oil consumption of the engine using the lubricating oil tank of the present invention is about 2 times the theoretical lubricating oil consumption. It can be concluded that the use of the lubricating oil tank of the present invention can greatly reduce the actual lubricating oil consumption of the unmanned aerial vehicle engine, that is, the unmanned aerial vehicle engine has a longer flight time with the same amount of lubricating oil.

[0038] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A lubricating oil tank for an unmanned aerial vehicle engine, comprising a box body provided with an oil storage cavity, an oil filling port and a vent provided at the upper portion of the box body, and an oil outflow port provided at the lower portion of the box body, characterized in that: The interior of the box body is provided with a transverse partition and a vertical partition connected to the inner wall of the box body, and the transverse partition and the vertical partition are both penetrated with oil holes.

2. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 1, characterized in that: The transverse partition and the vertical partition are fixedly connected to each other.

3. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 2, characterized in that: The transverse partition and the vertical partition are integrally formed.

4. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 3, characterized in that: The transverse partitions and the vertical partitions are both integrally formed with the box body.

5. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 4, characterized in that: The oil holes are distributed along the edge of the transverse partition and the edge of the vertical partition.

6. The lubricating oil tank for an unmanned aerial vehicle engine according to any one of claims 1 to 5, characterized in that: A labyrinth passage is arranged inside the box body, and the vent is communicated with the oil storage cavity through the labyrinth passage.

7. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 6, characterized in that: A baffle is provided on the top of the box body, a buffer cavity is formed between the baffle and the top wall of the box body, a first connecting port is provided between the buffer cavity and the labyrinth passage, and a second connecting port connecting the buffer cavity and the oil storage cavity is provided on the baffle away from the first connecting port.

8. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 7, characterized in that: An oil shield covering the lubricating oil outlet is arranged in the oil storage cavity, and oil guide holes are penetrated through the top and bottom of the oil shield.

9. The lubricating oil tank for an unmanned aerial vehicle engine according to claim 8, characterized in that: The oil shield is integrally formed with the box body.

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